US20180073973A1 - Particulate matters sensor device and manufacturing method of sensor unit provided in this - Google Patents
Particulate matters sensor device and manufacturing method of sensor unit provided in this Download PDFInfo
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- US20180073973A1 US20180073973A1 US15/372,297 US201615372297A US2018073973A1 US 20180073973 A1 US20180073973 A1 US 20180073973A1 US 201615372297 A US201615372297 A US 201615372297A US 2018073973 A1 US2018073973 A1 US 2018073973A1
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- detecting
- exhaust gas
- particulate matters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
- G01N15/1031—Investigating individual particles by measuring electrical or magnetic effects thereof, e.g. conductivity or capacity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/028—Circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4602—Manufacturing multilayer circuits characterized by a special circuit board as base or central core whereon additional circuit layers are built or additional circuit boards are laminated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/05—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a particulate sensor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
- F01N2560/20—Sensor having heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/14—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N2015/0042—Investigating dispersion of solids
- G01N2015/0046—Investigating dispersion of solids in gas, e.g. smoke
Definitions
- the present invention relates to a particulate matters sensor device including a sensing unit which precisely senses particulate matters included in exhaust gas and a manufacturing method of a sensor unit provided in this.
- a diesel particulate filter for reducing particulates is applied to diesel vehicles and a differential pressure sensor is adopted to sense the quantity of particulates collected in the diesel particulate filter (DPF).
- DPF diesel particulate filter
- FIG. 7 is a schematic configuration diagram of a general exhaust line.
- exhaust gas flows in the exhaust line 700 and particulate matters 710 are included in the exhaust gas.
- the particulate matters 710 pass adjacent to a particulate matters (PM) sensor 720 and as the particulate matters 710 pass, the PM sensor 720 generates a signal.
- PM particulate matters
- the signal generated by the PM sensor 720 is generated due to electric charges induced to the PM sensor 720 when charged particulate matters pass.
- Various aspects of the present invention are directed to providing a particulate matters sensor device which stably and accurately detects particulate matters included in exhaust gas regardless of an installation direction and a manufacturing method of a sensor device provided in this.
- a particulate matters sensor device detecting particulate matters (PM) included in exhaust gas, including a detecting device having detecting electrodes formed on an external peripheral surface of a base having a bar shape with a circular cross section at a predetermined interval in a predetermined direction to sense the particulate matters included in the exhaust gas.
- PM particulate matters
- the detecting electrodes may be formed in a flow direction of the exhaust gas.
- a temperature electrode configured to sense a temperature and a heating electrode configured to generate heat may be formed in the base based on the detecting electrodes.
- the particulate matters sensor device may further include a first tube into which the detecting device is inserted in a longitudinal direction, and a first passage through which the exhaust gas is discharged may be formed at an end portion corresponding to an end portion of the detecting device and a second passage through which the exhaust gas flows from the external surface to the internal surface of the first tube at an opposite side to the first passage based on the detecting electrode may be formed.
- the particulate matters sensor device may further include a second tube having an internal peripheral surface corresponding to the external peripheral surface of the first tube, and a third tube through which the exhaust gas flows in from the outside to the inside may be formed on an end surface of the second tube.
- the detecting electrodes may be formed in the longitudinal direction of the base.
- the particulate matters sensor device may further include the first tube into which the detecting device is inserted in the longitudinal direction, and the first and second passages through which the exhaust gas flows in or out may be formed at least at both sides of a position corresponding to the detecting electrode in the first tube and the guides which guide the exhaust gas passing through the first and second passages to flow on the circumference of the detecting device may be formed on the internal surface of the first tube.
- the detecting electrodes may be formed in the circumferential direction of the base.
- the particulate matters sensor device may further include the first tube into which the detecting device is inserted in the longitudinal direction, and the first passage through which the exhaust gas is discharged may be formed at the end portion corresponding to the end portion of the detecting device and the second passage through which the exhaust gas flows from the external surface to the internal surface of the first tube at the opposite side to the first passage based on the detecting electrode may be formed, and the guides may be formed on the internal surface of the second passage so that the exhaust gas is discharged through the first passage while rotating along the external peripheral surface of the detecting device.
- the detecting electrodes may be formed in a screw shape to rotate along the external peripheral surface of the detecting device from the first passage to the second passage.
- Various aspects of the present invention are directed to providing a manufacturing method of a detecting device, including: preparing a base having a shape corresponding to an external peripheral surface of a cylinder; preparing a sheet in which detecting electrodes detecting particulate matters extend in a predetermined direction at a predetermined interval; attaching the sheet onto the external peripheral surface of the base; and sintering the sheet at a predetermined temperature to fix the sheet to the base.
- the method may further include: forming a temperature electrode for detecting a temperature on the sheet; and forming a heating electrode on the sheet, and the detecting electrodes may be formed on the temperature electrode or the heating electrode and the detecting electrodes may be exposed to the outside.
- the detecting electrodes may extend in the longitudinal direction of the base and be arrayed at a predetermined interval in the circumferential direction of the base.
- the detecting electrodes may extend in the circumferential direction of the base and be arrayed at a predetermined interval in the longitudinal direction of the base.
- the detecting electrodes may be formed to have a screw shape on the external peripheral surface of the detecting device.
- the detecting electrode may include one of jewelry materials and the base and the sheet may include one of ceramic materials.
- the detecting electrode may include at least one of W, MO, and Pt and the base and the base and the sheet may include one of Al 2 O 3 , Zirconia, AIN, and SiN.
- sensitivity can be enhanced by increasing a detecting area of a detecting electrode and detecting precision of the detecting electrode can be enhanced regardless of an installation direction of the detecting device.
- FIG. 1 is a schematic configuration diagram illustrating a manufacturing order of a detecting device according to an exemplary embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view illustrating a cross section of the detecting device according to the exemplary embodiment of the present invention.
- FIG. 3 is a flowchart of a manufacturing method of a detecting device according to an exemplary embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a particulate matters sensor device including a detecting device according to the exemplary embodiment of the present invention.
- FIG. 5 is a cross-sectional view of a particulate matters sensor device including a detecting device according to another exemplary embodiment of the present invention.
- FIG. 6 is a cross-sectional view of a particulate matters sensor device including a detecting device according to yet another exemplary embodiment of the present invention.
- FIG. 7 is a schematic configuration diagram of a general exhaust line.
- FIG. 1 is a schematic configuration diagram illustrating a manufacturing order of a detecting device according to an exemplary embodiment of the present invention.
- a detecting electrode 110 is formed along a line set on a ceramic sheet 105 .
- the detecting electrode 110 includes a cathode line and an anode lie and in the detecting electrode 110 , the cathode line and the anode line are alternately arrayed at a predetermined interval.
- the base 100 has a cylindrical shape (alternatively, a bar shape) in which a cross section is circular and the sheet 105 in which the detecting electrode 110 is formed is sequentially attached onto an external peripheral surface of the base 100 .
- the ceramic sheet 105 is sintered at a predetermined temperature to be fixed to the base 100 .
- FIG. 2 is a schematic cross-sectional view illustrating a cross section of the detecting device according to the exemplary embodiment of the present invention.
- the detecting electrode 110 is formed outside the detecting device 150 , a temperature electrode 210 is formed inside the detecting electrode 110 , and a heating electrode is formed inside the temperature electrode 210 .
- the heating electrode 200 may be formed on the sheet 105 , the temperature electrode 210 may be formed thereon, and the detecting electrode 110 may be formed thereon.
- the sheet 105 in which the heating electrode 200 , the temperature electrode 210 , and the detecting electrode 110 are sequentially stacked may be attached onto the external peripheral surface of the base 100 .
- FIG. 3 is a flowchart of a manufacturing method of a detecting device according to another exemplary embodiment of the present invention.
- the ceramic sheet 105 is prepared and in S 310 , the heating electrode 200 is stacked on the ceramic sheet 105 .
- the temperature electrode 210 is stacked on the heating electrode 200 and in S 330 , the detecting electrode 110 is stacked.
- the temperature electrode 210 and the heating electrode 200 may be selectively adopted.
- the heating electrode 200 , the temperature electrode 210 , and the detecting electrode 110 are attached onto the external peripheral surface of the base 100 having the bar shape with the circular cross section, in S 350 , the sheet 105 is sintered at a predetermined temperature to be fixed to the base 100 , and in S 360 , the detecting device 150 is completed.
- FIG. 4 is a cross-sectional view of a particulate matters sensor device including a detecting device according to the exemplary embodiment of the present invention.
- a first tube 400 is disposed and the detecting device 150 is inserted into the first tube 400 in a longitudinal direction.
- the external peripheral surface of the detecting device 150 and the internal peripheral surface of the first tube 400 are formed at a predetermined interval from each other.
- a first passage 424 through which exhaust gas is discharged is formed at the center of the bottom of the first tube 400 and a second passage 422 is formed from one internal surface to one external surface of the first tube 400 at an opposite side to the first passage 424 based on the detecting electrode 110 .
- the exhaust gas is supplied to the inside of the first tube 400 through the second passage 422 , and the exhaust gas which enters the inside of the first tube 400 moves down and is discharged down through the first passage 424 .
- the detecting electrode 110 of the detecting device 150 detects particulate matters (PM) included in the exhaust gas.
- the cathode line and the anode line of the detecting electrode 110 extend in the longitudinal direction of the detecting device 150 and are arrayed at a predetermined interval in a circumferential direction.
- the first tube 400 is inserted into a second tube 410 and the detecting device 150 is inserted into the first tube 400 in the longitudinal direction.
- the external peripheral surface of the detecting device 150 and the internal peripheral surface of the first tube 400 are formed at a predetermined interval from each other.
- the first passage 424 through which the exhaust gas is discharged is formed at the center of the bottom of the first tube 400 and the second passage 422 is formed from one internal surface to one external surface of the first tube 400 at the opposite side to the first passage 424 based on the detecting electrode 110 .
- a third passage 426 through which the exhaust gas flows in is formed on the bottom of the second tube 410 . Accordingly, the exhaust gas is supplied to the inside of the second tube 410 through the third passage 426 and supplied to the inside of the first tube 400 through the second passage 422 , and the exhaust gas which enters the inside of the first tube 400 moves down.
- the detecting electrode 110 of the detecting device 150 detects the particulate matters (PM) included in the exhaust gas and the exhaust gas is discharged down through the first passage 424 .
- the cathode line and the anode line of the detecting electrode 110 extend in the longitudinal direction of the detecting device 150 and are arrayed at a predetermined interval in the circumferential direction.
- FIG. 5 is a cross-sectional view of a particulate matters sensor device including a detecting device according to another exemplary embodiment of the present invention.
- the first tube 400 is disposed and the detecting device 150 is inserted into the first tube 400 in the longitudinal direction.
- the external peripheral surface of the detecting device 150 and the internal peripheral surface of the first tube 400 are formed at a predetermined interval from each other.
- the first passage 424 is formed from one internal surface to one external surface of the first tube 400
- the second passage 422 is formed from the other internal surface to the other external surface
- the first passage 424 and the second passage 424 are formed at positions corresponding to the detecting electrode 110 of the detecting device 150 .
- the exhaust gas which enters the inside of the first tube 400 through the second passage 422 is discharged through the first passage 424 by passing through the periphery of the detecting device 150 .
- guides 500 are formed on one side and the other side of the internal surface of the first tube 400 and the guides 500 control the flow direction of the exhaust gas which flows in through the second passage 422 to allow the exhaust gas to flow onto one external peripheral surface of the detecting device 150 .
- the guides 500 guide the flow of the exhaust gas so that the exhaust gas is easily discharged through the first passage 424 .
- the first passage 424 and the second passage 422 may be formed at a predetermined interval along the circumference of the first tube 400 .
- the cathode line and the anode line of the detecting electrode 110 extend in the circumferential direction of the detecting device 150 and are arrayed at a predetermined interval in the longitudinal direction.
- FIG. 6 is a cross-sectional view of a particulate matters sensor device including a detecting device according to yet another exemplary embodiment of the present invention.
- the first tube 400 is disposed and the detecting device 150 is inserted into the first tube 400 in the longitudinal direction.
- the external peripheral surface of the detecting device 150 and the internal peripheral surface of the first tube 400 are formed at a predetermined interval from each other.
- the first passage 424 through which the exhaust gas is discharged is formed at the center of the bottom of the first tube 400 and the second passage 422 is formed from one internal surface to one external surface of the first tube 400 at the opposite side to the first passage 424 based on the detecting electrode 110 .
- the exhaust gas is supplied to the inside of the first tube 400 through the second passage 422 and the exhaust gas which enters the inside of the first tube 400 moves down.
- the detecting electrode 110 detects the particulate matters (PM) included in the exhaust gas and the exhaust gas is discharged down through the first passage 424 .
- the guides 500 which moves the exhaust gas down while rotating the exhaust gas are formed to extend on the internal surface of the first tube 400 in the second passage 422 .
- the exhaust gas which enters the inside of the first tube 400 through the second passage 422 moves down while rotating in a screw shape along the external peripheral surface of the detecting device 150 and the internal peripheral surface of the first tube 400 to be discharged down through the first passage 424 .
- the cathode line and the anode line of the detecting electrode 110 extend in the screw shape from the top portion to the bottom on the external peripheral surface of the detecting device 150 in a movement direction of the exhaust gas.
- the second passage 422 may be formed on the circumference of the first tube 400 at a predetermined interval or consecutively formed within a predetermined angle range.
- the detecting electrode may include one of jewelry materials and the base and the sheet may include one of ceramic materials.
- the detecting electrode may include at least one of W, MO, and Pt and the base and the sheet may include one of Al 2 O 3 , Zirconia, AIN, and SiN.
Abstract
Disclosed is a particulate matters sensor device detecting particulate matters (PM) included in exhaust gas, including: a detecting device having detecting electrodes formed on an external peripheral surface of a base having a bar shape with a circular cross section at a predetermined interval in a predetermined direction to sense the particulate matters included in the exhaust gas.
Description
- The present application claims priority to Korean Patent Application No. 10-2016-0117548 filed on Sep. 12, 2016, the entire contents of which is incorporated herein for all purposes by this reference.
- The present invention relates to a particulate matters sensor device including a sensing unit which precisely senses particulate matters included in exhaust gas and a manufacturing method of a sensor unit provided in this.
- A diesel particulate filter for reducing particulates is applied to diesel vehicles and a differential pressure sensor is adopted to sense the quantity of particulates collected in the diesel particulate filter (DPF).
- In the future, it may be impossible to prevent the diesel particulate filter from being damaged and precision deteriorates by using the existing differential pressure sensor according to an exhaust gas regulation.
-
FIG. 7 is a schematic configuration diagram of a general exhaust line. - Referring to
FIG. 7 , exhaust gas flows in theexhaust line 700 andparticulate matters 710 are included in the exhaust gas. - The
particulate matters 710 pass adjacent to a particulate matters (PM)sensor 720 and as theparticulate matters 710 pass, thePM sensor 720 generates a signal. - The signal generated by the
PM sensor 720 is generated due to electric charges induced to thePM sensor 720 when charged particulate matters pass. - Meanwhile, sensitivity of the sensor deteriorates according to an installation direction of the PM sensor and the sensitivity of the sensor deteriorates according to a flow direction of the exhaust gas. Therefore, a research for solving the problems has been progressed. Moreover, a research into a manufacturing method for the PM sensor to achieve such a purpose has been simultaneously progressed.
- The information disclosed in this Background of the Invention section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
- Various aspects of the present invention are directed to providing a particulate matters sensor device which stably and accurately detects particulate matters included in exhaust gas regardless of an installation direction and a manufacturing method of a sensor device provided in this.
- Various aspects of the present invention are directed to providing a particulate matters sensor device detecting particulate matters (PM) included in exhaust gas, including a detecting device having detecting electrodes formed on an external peripheral surface of a base having a bar shape with a circular cross section at a predetermined interval in a predetermined direction to sense the particulate matters included in the exhaust gas.
- The detecting electrodes may be formed in a flow direction of the exhaust gas.
- A temperature electrode configured to sense a temperature and a heating electrode configured to generate heat may be formed in the base based on the detecting electrodes.
- The particulate matters sensor device may further include a first tube into which the detecting device is inserted in a longitudinal direction, and a first passage through which the exhaust gas is discharged may be formed at an end portion corresponding to an end portion of the detecting device and a second passage through which the exhaust gas flows from the external surface to the internal surface of the first tube at an opposite side to the first passage based on the detecting electrode may be formed.
- The particulate matters sensor device may further include a second tube having an internal peripheral surface corresponding to the external peripheral surface of the first tube, and a third tube through which the exhaust gas flows in from the outside to the inside may be formed on an end surface of the second tube.
- The detecting electrodes may be formed in the longitudinal direction of the base.
- The particulate matters sensor device may further include the first tube into which the detecting device is inserted in the longitudinal direction, and the first and second passages through which the exhaust gas flows in or out may be formed at least at both sides of a position corresponding to the detecting electrode in the first tube and the guides which guide the exhaust gas passing through the first and second passages to flow on the circumference of the detecting device may be formed on the internal surface of the first tube.
- The detecting electrodes may be formed in the circumferential direction of the base.
- The particulate matters sensor device may further include the first tube into which the detecting device is inserted in the longitudinal direction, and the first passage through which the exhaust gas is discharged may be formed at the end portion corresponding to the end portion of the detecting device and the second passage through which the exhaust gas flows from the external surface to the internal surface of the first tube at the opposite side to the first passage based on the detecting electrode may be formed, and the guides may be formed on the internal surface of the second passage so that the exhaust gas is discharged through the first passage while rotating along the external peripheral surface of the detecting device.
- The detecting electrodes may be formed in a screw shape to rotate along the external peripheral surface of the detecting device from the first passage to the second passage.
- Various aspects of the present invention are directed to providing a manufacturing method of a detecting device, including: preparing a base having a shape corresponding to an external peripheral surface of a cylinder; preparing a sheet in which detecting electrodes detecting particulate matters extend in a predetermined direction at a predetermined interval; attaching the sheet onto the external peripheral surface of the base; and sintering the sheet at a predetermined temperature to fix the sheet to the base.
- The method may further include: forming a temperature electrode for detecting a temperature on the sheet; and forming a heating electrode on the sheet, and the detecting electrodes may be formed on the temperature electrode or the heating electrode and the detecting electrodes may be exposed to the outside.
- The detecting electrodes may extend in the longitudinal direction of the base and be arrayed at a predetermined interval in the circumferential direction of the base.
- The detecting electrodes may extend in the circumferential direction of the base and be arrayed at a predetermined interval in the longitudinal direction of the base.
- The detecting electrodes may be formed to have a screw shape on the external peripheral surface of the detecting device.
- The detecting electrode may include one of jewelry materials and the base and the sheet may include one of ceramic materials.
- The detecting electrode may include at least one of W, MO, and Pt and the base and the base and the sheet may include one of Al2O3, Zirconia, AIN, and SiN.
- According to exemplary embodiments of the present invention, sensitivity can be enhanced by increasing a detecting area of a detecting electrode and detecting precision of the detecting electrode can be enhanced regardless of an installation direction of the detecting device.
- The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention.
-
FIG. 1 is a schematic configuration diagram illustrating a manufacturing order of a detecting device according to an exemplary embodiment of the present invention. -
FIG. 2 is a schematic cross-sectional view illustrating a cross section of the detecting device according to the exemplary embodiment of the present invention. -
FIG. 3 is a flowchart of a manufacturing method of a detecting device according to an exemplary embodiment of the present invention. -
FIG. 4 is a cross-sectional view of a particulate matters sensor device including a detecting device according to the exemplary embodiment of the present invention. -
FIG. 5 is a cross-sectional view of a particulate matters sensor device including a detecting device according to another exemplary embodiment of the present invention. -
FIG. 6 is a cross-sectional view of a particulate matters sensor device including a detecting device according to yet another exemplary embodiment of the present invention. -
FIG. 7 is a schematic configuration diagram of a general exhaust line. - It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.
- In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.
- Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
- Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.
- However, since size and thickness of each component illustrated in the drawings are arbitrarily represented for convenience in explanation, the present invention is not particularly limited to the illustrated size and thickness of each component and the thickness is enlarged and illustrated to clearly express various parts and areas.
- However, parts not associated with description are omitted for clearly describing the exemplary embodiment of the present invention and like reference numerals designate like elements throughout the specification.
- In the following description, names of components, which are in the same relationship, are divided into “the first”, “the second”, and the like to distinguish the components, but the present invention is not limited to the order.
-
FIG. 1 is a schematic configuration diagram illustrating a manufacturing order of a detecting device according to an exemplary embodiment of the present invention. - Referring to
FIG. 1 , a detectingelectrode 110 is formed along a line set on aceramic sheet 105. The detectingelectrode 110 includes a cathode line and an anode lie and in the detectingelectrode 110, the cathode line and the anode line are alternately arrayed at a predetermined interval. - Prior art is referred for a method of forming the detecting
electrode 110 on theceramic sheet 105 and detailed description thereof is omitted. - In addition, the
base 100 has a cylindrical shape (alternatively, a bar shape) in which a cross section is circular and thesheet 105 in which the detectingelectrode 110 is formed is sequentially attached onto an external peripheral surface of thebase 100. In addition, theceramic sheet 105 is sintered at a predetermined temperature to be fixed to thebase 100. -
FIG. 2 is a schematic cross-sectional view illustrating a cross section of the detecting device according to the exemplary embodiment of the present invention. - Referring to
FIG. 2 , the detectingelectrode 110 is formed outside the detectingdevice 150, atemperature electrode 210 is formed inside the detectingelectrode 110, and a heating electrode is formed inside thetemperature electrode 210. - In the exemplary embodiment of the present invention, the
heating electrode 200 may be formed on thesheet 105, thetemperature electrode 210 may be formed thereon, and the detectingelectrode 110 may be formed thereon. - In addition, the
sheet 105 in which theheating electrode 200, thetemperature electrode 210, and the detectingelectrode 110 are sequentially stacked may be attached onto the external peripheral surface of thebase 100. -
FIG. 3 is a flowchart of a manufacturing method of a detecting device according to another exemplary embodiment of the present invention. - Referring to
FIG. 3 , in S300, theceramic sheet 105 is prepared and in S310, theheating electrode 200 is stacked on theceramic sheet 105. - In S320, the
temperature electrode 210 is stacked on theheating electrode 200 and in S330, the detectingelectrode 110 is stacked. Herein, thetemperature electrode 210 and theheating electrode 200 may be selectively adopted. - In addition, in S340, the
heating electrode 200, thetemperature electrode 210, and the detectingelectrode 110 are attached onto the external peripheral surface of the base 100 having the bar shape with the circular cross section, in S350, thesheet 105 is sintered at a predetermined temperature to be fixed to thebase 100, and in S360, the detectingdevice 150 is completed. -
FIG. 4 is a cross-sectional view of a particulate matters sensor device including a detecting device according to the exemplary embodiment of the present invention. - Referring to
FIG. 4A , afirst tube 400 is disposed and the detectingdevice 150 is inserted into thefirst tube 400 in a longitudinal direction. Herein, the external peripheral surface of the detectingdevice 150 and the internal peripheral surface of thefirst tube 400 are formed at a predetermined interval from each other. - A
first passage 424 through which exhaust gas is discharged is formed at the center of the bottom of thefirst tube 400 and asecond passage 422 is formed from one internal surface to one external surface of thefirst tube 400 at an opposite side to thefirst passage 424 based on the detectingelectrode 110. - The exhaust gas is supplied to the inside of the
first tube 400 through thesecond passage 422, and the exhaust gas which enters the inside of thefirst tube 400 moves down and is discharged down through thefirst passage 424. - Herein, the detecting
electrode 110 of the detectingdevice 150 detects particulate matters (PM) included in the exhaust gas. In addition, the cathode line and the anode line of the detectingelectrode 110 extend in the longitudinal direction of the detectingdevice 150 and are arrayed at a predetermined interval in a circumferential direction. - Referring to
FIG. 4B , thefirst tube 400 is inserted into asecond tube 410 and the detectingdevice 150 is inserted into thefirst tube 400 in the longitudinal direction. - Herein, the external peripheral surface of the detecting
device 150 and the internal peripheral surface of thefirst tube 400 are formed at a predetermined interval from each other. - The
first passage 424 through which the exhaust gas is discharged is formed at the center of the bottom of thefirst tube 400 and thesecond passage 422 is formed from one internal surface to one external surface of thefirst tube 400 at the opposite side to thefirst passage 424 based on the detectingelectrode 110. - In addition, a
third passage 426 through which the exhaust gas flows in is formed on the bottom of thesecond tube 410. Accordingly, the exhaust gas is supplied to the inside of thesecond tube 410 through thethird passage 426 and supplied to the inside of thefirst tube 400 through thesecond passage 422, and the exhaust gas which enters the inside of thefirst tube 400 moves down. - Herein, the detecting
electrode 110 of the detectingdevice 150 detects the particulate matters (PM) included in the exhaust gas and the exhaust gas is discharged down through thefirst passage 424. - As illustrated in
FIG. 4 , the cathode line and the anode line of the detectingelectrode 110 extend in the longitudinal direction of the detectingdevice 150 and are arrayed at a predetermined interval in the circumferential direction. -
FIG. 5 is a cross-sectional view of a particulate matters sensor device including a detecting device according to another exemplary embodiment of the present invention. - Referring to
FIG. 5A , thefirst tube 400 is disposed and the detectingdevice 150 is inserted into thefirst tube 400 in the longitudinal direction. Herein, the external peripheral surface of the detectingdevice 150 and the internal peripheral surface of thefirst tube 400 are formed at a predetermined interval from each other. - The
first passage 424 is formed from one internal surface to one external surface of thefirst tube 400, thesecond passage 422 is formed from the other internal surface to the other external surface, and thefirst passage 424 and thesecond passage 424 are formed at positions corresponding to the detectingelectrode 110 of the detectingdevice 150. - Accordingly, the exhaust gas which enters the inside of the
first tube 400 through thesecond passage 422 is discharged through thefirst passage 424 by passing through the periphery of the detectingdevice 150. - In the exemplary embodiment of the present invention, guides 500 are formed on one side and the other side of the internal surface of the
first tube 400 and theguides 500 control the flow direction of the exhaust gas which flows in through thesecond passage 422 to allow the exhaust gas to flow onto one external peripheral surface of the detectingdevice 150. - Further, the
guides 500 guide the flow of the exhaust gas so that the exhaust gas is easily discharged through thefirst passage 424. Moreover, thefirst passage 424 and thesecond passage 422 may be formed at a predetermined interval along the circumference of thefirst tube 400. - As illustrated in
FIG. 5 , the cathode line and the anode line of the detectingelectrode 110 extend in the circumferential direction of the detectingdevice 150 and are arrayed at a predetermined interval in the longitudinal direction. -
FIG. 6 is a cross-sectional view of a particulate matters sensor device including a detecting device according to yet another exemplary embodiment of the present invention. - Referring to
FIG. 6 , thefirst tube 400 is disposed and the detectingdevice 150 is inserted into thefirst tube 400 in the longitudinal direction. Herein, the external peripheral surface of the detectingdevice 150 and the internal peripheral surface of thefirst tube 400 are formed at a predetermined interval from each other. - The
first passage 424 through which the exhaust gas is discharged is formed at the center of the bottom of thefirst tube 400 and thesecond passage 422 is formed from one internal surface to one external surface of thefirst tube 400 at the opposite side to thefirst passage 424 based on the detectingelectrode 110. - The exhaust gas is supplied to the inside of the
first tube 400 through thesecond passage 422 and the exhaust gas which enters the inside of thefirst tube 400 moves down. - In addition, the detecting
electrode 110 detects the particulate matters (PM) included in the exhaust gas and the exhaust gas is discharged down through thefirst passage 424. - Meanwhile, the
guides 500 which moves the exhaust gas down while rotating the exhaust gas are formed to extend on the internal surface of thefirst tube 400 in thesecond passage 422. - The exhaust gas which enters the inside of the
first tube 400 through thesecond passage 422 moves down while rotating in a screw shape along the external peripheral surface of the detectingdevice 150 and the internal peripheral surface of thefirst tube 400 to be discharged down through thefirst passage 424. - As illustrated in
FIG. 6 , the cathode line and the anode line of the detectingelectrode 110 extend in the screw shape from the top portion to the bottom on the external peripheral surface of the detectingdevice 150 in a movement direction of the exhaust gas. - In addition, the
second passage 422 may be formed on the circumference of thefirst tube 400 at a predetermined interval or consecutively formed within a predetermined angle range. - In the exemplary embodiment of the present invention, the detecting electrode may include one of jewelry materials and the base and the sheet may include one of ceramic materials.
- In addition, the detecting electrode may include at least one of W, MO, and Pt and the base and the sheet may include one of Al2O3, Zirconia, AIN, and SiN.
- While this invention has been described in connection with what is presently considered to be practical example embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. On the contrary, it is intended to cover various modifications and equivalent claims as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.”
- For convenience in explanation and accurate definition in the appended claims, the terms “upper”, “lower”, “inner”, “outer”, “up”, “down”, “upper”, “lower”, “upwards”, “downwards”, “front”, “rear”, “back”, “inside”, “outside”, “inwardly”, “outwardly”, “interior”, “exterior”, “inner”, “outer”, “forwards”, and “backwards” are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures.
- The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.
Claims (17)
1. A particulate matters sensor device detecting particulate matters (PM) included in exhaust gas, comprising:
a detecting device having detecting electrodes formed on an external peripheral surface of a base having a bar shape with a circular cross section at a predetermined interval in a predetermined direction to sense the particulate matters included in the exhaust gas.
2. The particulate matters sensor device of claim 1 , wherein the detecting electrodes are formed in a flow direction of the exhaust gas.
3. The particulate matters sensor device of claim 1 , wherein based on the detecting electrodes, in the base, a temperature electrode configured to sense a temperature, and a heating electrode configured to generate heat are formed.
4. The particulate matters sensor device of claim 2 , further including:
a first tube into which the detecting device is inserted in a longitudinal direction thereof,
wherein a first passage through which the exhaust gas is discharged is formed at an end portion thereof corresponding to an end portion of the detecting device and a second passage through which the exhaust gas flows from an external surface to an internal surface of the first tube at an opposite side to the first passage based on the detecting electrodes is formed.
5. The particulate matters sensor device of claim 4 , further including:
a second tube having an internal peripheral surface corresponding to the external surface of the first tube,
wherein a third tube through which the exhaust gas flows in from an outside to an inside thereof is formed on an end surface of the second tube.
6. The particulate matters sensor device of claim 4 , wherein the detecting electrodes are formed in a longitudinal direction of the base.
7. The particulate matters sensor device of claim 4 , further including:
the first tube into which the detecting device is inserted in the longitudinal direction thereof,
wherein the first and second passages through which the exhaust gas flows in or out are formed at least at a first side and a second side of a position corresponding to the detecting electrodes in the first tube, and
guides which guide the exhaust gas passing through the first and second passages to flow on a circumference of the detecting device are formed on the internal surface of the first tube.
8. The particulate matters sensor device of claim 7 , wherein the detecting electrodes are formed in a circumferential direction of the base.
9. The particulate matters sensor device of claim 2 , further including:
the first tube into which the detecting device is inserted in the longitudinal direction thereof,
wherein the first passage through which the exhaust gas is discharged is formed at an end portion corresponding to an end portion of the detecting device and the second passage through which the exhaust gas flows from an external surface to an internal surface of the first tube at an opposite side to the first passage based on the detecting electrode is formed, and
guides are formed on an internal surface of the second passage wherein the exhaust gas is discharged through the first passage while rotating along an external peripheral surface of the detecting device.
10. The particulate matters sensor device of claim 9 , wherein
the detecting electrodes are formed in a screw shape to rotate along the external peripheral surface of the detecting device from the first passage to the second passage.
11. A manufacturing method of a detecting device, comprising:
preparing a base having a shape corresponding to an external peripheral surface of a cylinder;
preparing a sheet in which detecting electrodes detecting particulate matters extend in a predetermined direction at a predetermined interval;
attaching the sheet onto the external peripheral surface of the base; and
sintering the sheet at a predetermined temperature to fix the sheet to the base.
12. The method of claim 11 , further including:
forming a temperature electrode for detecting a temperature on the sheet; and
forming a heating electrode on the sheet,
wherein the detecting electrodes are formed on the temperature electrode or the heating electrode and the detecting electrodes are exposed to an outside thereof.
13. The method of claim 11 , wherein the detecting electrodes are configured to extend in the longitudinal direction of the base and are arrayed at a predetermined interval in a circumferential direction of the base.
14. The method of claim 11 , wherein the detecting electrodes extend in the circumferential direction of the base and are arrayed at a predetermined interval in the longitudinal direction of the base.
15. The method of claim 11 , wherein the detecting electrodes are formed to have a screw shape on an external peripheral surface of the detecting device.
16. The method of claim 11 , wherein the detecting electrode includes one of jewelry materials, and the base and the sheet include one of ceramic materials.
17. The method of claim 16 , wherein the detecting electrode includes at least one of W, MO, and Pt and the base, and the base and the sheet include one of Al2O3, Zirconia, AIN, and SiN.
Priority Applications (1)
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US16/201,752 US10962466B2 (en) | 2016-09-12 | 2018-11-27 | Particulate matters sensor device and manufacturing method of sensor unit provided in this |
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KR10-2016-0117548 | 2016-09-12 | ||
KR20160117548 | 2016-09-12 |
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US16/201,752 Division US10962466B2 (en) | 2016-09-12 | 2018-11-27 | Particulate matters sensor device and manufacturing method of sensor unit provided in this |
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US15/372,297 Abandoned US20180073973A1 (en) | 2016-09-12 | 2016-12-07 | Particulate matters sensor device and manufacturing method of sensor unit provided in this |
US16/201,752 Active 2037-05-24 US10962466B2 (en) | 2016-09-12 | 2018-11-27 | Particulate matters sensor device and manufacturing method of sensor unit provided in this |
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US (2) | US20180073973A1 (en) |
CN (1) | CN107817197B (en) |
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2016
- 2016-12-07 US US15/372,297 patent/US20180073973A1/en not_active Abandoned
- 2016-12-21 CN CN201611195474.1A patent/CN107817197B/en not_active Expired - Fee Related
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CN107817197B (en) | 2021-08-24 |
US10962466B2 (en) | 2021-03-30 |
DE102017210184A1 (en) | 2018-03-15 |
CN107817197A (en) | 2018-03-20 |
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