CN110011651A - A kind of ground line extension tears wireless collection electronic switch shielding system and its working method open - Google Patents
A kind of ground line extension tears wireless collection electronic switch shielding system and its working method open Download PDFInfo
- Publication number
- CN110011651A CN110011651A CN201910308656.2A CN201910308656A CN110011651A CN 110011651 A CN110011651 A CN 110011651A CN 201910308656 A CN201910308656 A CN 201910308656A CN 110011651 A CN110011651 A CN 110011651A
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- Prior art keywords
- electronic switch
- open
- tears
- ground wire
- state
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
- H03K17/168—Modifications for eliminating interference voltages or currents in composite switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/18—Modifications for indicating state of switch
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a kind of ground line extensions to tear wireless collection electronic switch shielding system and its working method open, ground line real-time status is acquired by state of ground wire acquisition device, state of earth wire is transferred to Intelligent earth wire electronic switch contact output device by wired or wireless transmission mode, ground wire extension is depicted respectively and is torn open state and ground wire pile No. information and sends anti-error host to by electronic switch output+24V voltage or " 0 " and " 1 " that communicates without output two states come analogue data for Intelligent earth wire electronic switch contact output device.Both the requirement of data communication one-way transmission had been met, electronic switch is isolated between in turn ensuring device, communication data information high safety.
Description
Technical field
The invention belongs to electric power management system field, it is related to a kind of ground line extension and tears wireless collection electronic switch shielding system open
And its working method.
Background technique
Electric power temporary ground wire is a kind of power generation safety appliance.Since it is with low in cost, principle is simple and reliable,
Using the advantages that convenient is operated, it is widely used in the inspection operation of power equipment at present, for the equipment or line to maintenance
Road carries out ground protection, prevents unexpected send a telegram here from causing personal injury or equipment damage.But just due to temporary ground wire mounting
The property taken and provisional, it is easy to which the leakage that temporary ground wire occurs is hung or situation is torn in leakage open, so as to cause human casualty accident generation.It wants
Prevent or prevent the occurrence of violating the regulations from technological means, it is important to reliably realize that temporary ground wire mounts/dismounting state
Automatic collection.According to the mounting of temporary ground wire/dismounting state and anti-mis-logical, computer anti-misoperation and lockout technology can be passed through
Means prevent the leakage extension of temporary ground wire or leakage from tearing open, so as to prevent the hair of misoperation fault relevant to temporary ground wire
It is raw.
It is current to realize that temporary ground wire mounts/removes the automatic collection common method of state and is, by acquisition controller with
Anti-error host is connected and communicates, and realizes the transmission of state of ground wire data, i.e., directly carries out between acquisition controller and anti-error host
Data interaction.The shortcomings that this system and method is that system is unable to reach high security requirement in terms of the network information security.It is another
Kind method is that reversed physical isolation apparatus is installed between acquisition controller and anti-error host, to meet user to network security
Requirement, still, physical isolation apparatus price is very high.
The shortcomings that both the above system and method is that safety is low or with high costs.Therefore a kind of inexpensive, Gao Ke is proposed
It is hung by property ground line and tears wireless collection electronic switch shielding system and working method open.
Summary of the invention
The present invention provides a kind of ground line extension and tears wireless collection electronic switch shielding system open, including anti-error host, intelligently
Line electronic switch contact input device, Intelligent earth wire electronic switch contact output device, state of ground wire acquisition device, the ground wire
State of ground wire data are transferred to the Intelligent earth wire electronic switch contact output device, the Intelligent earth wire by state collecting device
Collected state of ground wire data are converted the output of electronic switch contact, the Intelligent earth wire by electronic switch contact output device
Electronic switch contact input device receives the state of ground wire data from the Intelligent earth wire electronic switch contact output device, and
State of ground wire data are transferred to the anti-error host.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the state of ground wire data include ground
Line extension tears status data and ground wire pile No. information data open.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the Intelligent earth wire electronic switch connects
Point inputting device includes that ground wire extension tears state open entry loop terminal and ground wire pile No. information open entry loop terminal open, is acquired by the intelligence
The ground wire extension that energy ground wire electronic switch contact output device provides tears state and ground wire pile No. information data open.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the Intelligent earth wire electronic switch connects
Point output device includes that ground wire hangs the state of tearing open and outputs loop terminals and ground wire pile No. information outputs loop terminals.
Ground line according to the present invention extension tears wireless collection electronic switch shielding system open, ground wire hang the state of tearing open output circuit and
Ground wire pile No. information outputs circuit using electronic switch.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the electronic switch includes pressure stabilizing two
Pole pipe, triode, metal-oxide-semiconductor and resistance-capacitance circuit, by realizing that ground is linear by the electronic switch output+24V voltage or without output
The transmission of state.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, passes through the Intelligent earth wire electronic cutting
The I/O output level of MCU in coila output device controls the electronic switch output+24V voltage or without output.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, metal-oxide-semiconductor in the electronic switch
Drain series forward diode.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the Intelligent earth wire electronic switch connects
Point output device tears shape open using any one electronic switch contact in 1 to 6 electronic switch contact to describe the extension of ground wire
State.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the Intelligent earth wire electronic switch connects
Point output device tears state open using 3 electronic switch contacts to describe the extension of ground wire.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the Intelligent earth wire electronic switch connects
Point output device describes ground wire pile No. information using at least 6 electronic switch contacts.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system open, and the Intelligent earth wire electronic switch connects
Point output device describes ground wire pile No. information using 12 electronic switch contacts.
The present invention also provides a kind of ground line extensions to tear wireless collection electronic switch shielding system working method open, including passes through ground
Line state collecting device acquisition ground line real-time status, is transferred to intelligence for state of earth wire by wired or wireless transmission mode
Ground wire electronic switch contact output device, the Intelligent earth wire electronic switch contact output device is by collected state of ground wire number
According to the output of electronic switch contact is converted into, the Intelligent earth wire electronic switch contact input device is received from the Intelligent earth wire
The state of ground wire data of electronic switch contact output device, and state of ground wire data are transferred to the anti-error host, it is described anti-
Accidentally linear state carries out logic judgment to the anti-mis-logical of host foundation system setting over the ground, issues to the ground wire for not meeting logical requirements
Alarm signal.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the state of ground wire number open
Status data and ground wire pile No. information data are torn open according to including ground wire extension.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the Intelligent earth wire electricity open
Sub switch contact input device includes that ground wire extension tears state open entry loop terminal and ground wire pile No. information open entry loop terminal open, is acquired
The ground wire extension provided by the Intelligent earth wire electronic switch contact output device tears state and ground wire pile No. information data open.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the Intelligent earth wire electricity open
Sub switch contact output device includes that ground wire hangs the state of tearing open and outputs loop terminals and ground wire pile No. information outputs loop terminals.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method open, and ground wire is hung the state of tearing open and opened
Circuit and ground wire pile No. information output circuit using electronic switch out.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the electronic switch packet open
Zener diode, triode, metal-oxide-semiconductor and resistance-capacitance circuit are included, by by the electronic switch output+24V voltage or without output reality
The transmission of existing state of ground wire.
Ground line according to the present invention extension tears wireless collection electronic switch shielding system working method open, by it is described intelligently
The I/O output level of MCU in line electronic switch contact output device controls the electronic switch output+24V voltage or without defeated
Out.
Ground line according to the present invention, which is hung, tears wireless collection electronic switch shielding system working method open, in the electronic switch
The drain series forward diode of metal-oxide-semiconductor.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the Intelligent earth wire electricity open
Sub switch contact output device describes ground wire using any one electronic switch contact in 1 to 6 electronic switch contact
Extension tear state open.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the Intelligent earth wire electricity open
Sub switch contact output device tears state open using 3 electronic switch contacts to describe the extension of ground wire.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the Intelligent earth wire electricity open
Sub switch contact output device describes ground wire pile No. information using at least 6 electronic switch contacts.
Ground line extension according to the present invention tears wireless collection electronic switch shielding system working method, the Intelligent earth wire electricity open
Sub switch contact output device describes ground wire pile No. information using 12 electronic switch contacts.
Beneficial effects of the present invention:
Technical solution of the present invention is applied to be had on mounting/dismounting condition detecting system of intelligent management temporary ground wire
Clearly the advantages of.The system structure principle is very simple, and circuit is reliably easily realized, because of the specific amplitude using electronic switch
Have higher anti-interference ability with timing transmission state, by electronic switch output+24V voltage or without output two states come
Ground wire extension is depicted respectively and tears state and ground wire pile No. information open and sends anti-error host to for " 0 " and " 1 " of analogue data communication.
Both the requirement of data communication one-way transmission had been met, electronic switch is isolated between in turn ensuring device, communication data information high safety.
Technical solution of the present invention can be applied in other state-detection occasions for needing to carry out electronic switch isolation.
Detailed description of the invention
Fig. 1 ground line, which is hung, tears state wireless collection electronic switch shielding system architecture diagram open；
Fig. 2 ground line, which is hung, tears state wireless collection electronic switch shielding system work flow diagram open；
Fig. 3 electronic switch internal circuit diagram.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that embodiment be merely to illustrate the present invention without
For limiting the scope of the invention.Furthermore, it is to be understood that after having read content disclosed in this invention, this field skill
Art personnel can make various changes or modifications the present invention, and such equivalent forms equally fall within protection scope defined by the present invention
Within.
State of ground wire acquisition system acquires ground wire real-time status by state of ground wire acquisition device with wireless transmission method, and
State of ground wire data are transferred to Intelligent earth wire electronic switch contact output device by wired or wireless transmission mode.The intelligence
Energy ground wire electronic switch output device is rack device, is equipped with front panel and postposition panel, and front panel is equipped with LED and shows
Screen is used to indicate system mode, power supply status, communication state, and electronic switch outputs state, and postposition panel is equipped with DC24V power supply
Input terminal, the state of tearing open outputs loop terminals to ground wire extension, ground wire pile No. information outputs loop terminals, system mode open entry loop end
Son and RS485 communication terminal, RS232 communication terminal and RS422 communication terminal.Intelligent earth wire electronic switch contact output dress
It sets and is additionally provided with MCU data processing unit.Intelligent earth wire electronic switch contact output device inputs 24V direct current for device hardware electricity
Road work.
The ground wire extension state of tearing open outputs circuit and ground wire pile No. information is outputed circuit and designed using electronic switch, electronic switch packet
Zener diode, triode, metal-oxide-semiconductor and resistance-capacitance circuit are included, physical circuit figure is referring to Fig. 3.In Fig. 3, DZ1 is zener diode,
R497 is current-limiting resistance, and C142 is filter capacitor, and D147 is diode of releasing, and R1071 is that transistor base and emitter are connected
Resistance.
MCU controls I/O mouthfuls of output low and high level electron switches, first passes through reversed zener diode when exporting high level
DZ1, driving triode Q238 is connected after current-limiting resistance R497 after reverse breakdown, in metal-oxide-semiconductor G1 after triode Q238 conducting
Grid and source electrode formed pressure difference conducting contact output+24V voltage (being equivalent to data 1)；The reversed pressure stabilizing when exporting low level
Diode DZ1 is not turned on, and triode Q238 base stage and emitter do not have pressure difference to be not turned on, and the grid and source electrode of metal-oxide-semiconductor G1 can not
It forms effective pressure difference to be not turned on, contact passes through the electronic switch output+24V voltage or nothing without output (being equivalent to data 0)
Output two states are to realize the output of data 0 and 1.The I/O mouth of MCU only exports effective high level, i.e. voltage is greater than
3V and it is specific when a length of 100mS square wave, could drive metal-oxide-semiconductor output+24V voltage, it is anti-using zener diode DZ1 in this circuit
It connects, be connected using the stabilizing voltage characteristic driving triode Q238 after Zener breakdown and further drive metal-oxide-semiconductor G1 conducting output specific
The 24V level of Shi Changwei 100mS, common interference, i.e. level are less than 3V or duration is not that continuous 100mS square wave then exports
In vain, data isolation degree is substantially increased, in addition guarantees system level in the forward diode D288 of the drain series of metal-oxide-semiconductor G1
It can only unidirectionally export, be further ensured that system data information high security.
System mode open entry loop is designed using optical coupling isolation circuit, acquires Intelligent earth wire electronic switch contact input device
Working condition.Intelligent earth wire electronic switch contact output device passes through RS485 communication terminal, RS232 communication terminal, RS422
Communication terminal obtains the state of ground wire data that state of ground wire acquisition device provides.
The Intelligent earth wire electronic switch contact input device is rack device, is equipped with front panel and postposition panel,
Front panel is equipped with LED display, is used to indicate system mode, power supply status and communication state, postposition panel band AC220V electricity
Source input terminal, DC24V output terminal, ground wire extension tear state open entry loop terminal open, ground wire pile No. information open entry loop terminal, are
System working condition output loop terminal, ethernet communication interface, RS485 communication terminal, RS232 communication terminal, RS422 communication terminal
Son and wireless communication antenna interface.Intelligent earth wire electronic switch contact input device inputs AC220V power supply for device hardware electricity
Road work, and DC24V is exported by terminal and supplies Intelligent earth wire electronic switch contact output device.Ground wire hang the state of tearing open open into return
Road and ground wire pile No. information open entry loop are designed using optical coupling isolation circuit, acquire Intelligent earth wire electronic switch contact output device
The ground wire extension of offer tears state and ground wire pile No. information data open.Working state of system output loop is designed using electronic switch, is led to
It crosses electronic switch isolation output+24V (data 1) or without exporting hanging (data 0), description Intelligent earth wire electronic switch contact is defeated
Four working conditions of apparatus system out are respectively as follows: normal operation, misoperation, system reset, system data resetting.Intelligence
Ground wire electronic switch contact input device collects state of ground wire and ground wire pile No. information data is transferred to by ethernet communication
Anti-error host.
Linear state and ground wire pile No. information carry out logic judgment to the anti-mis-logical of anti-error host foundation system setting over the ground, and
Real-time image display ground wire extension tears state and ground wire pile No. information open, issues alarm signal to the ground wire for not meeting logical requirements, mentions
The operator that wakes up carries out defect elimination processing, and only ground wire extension tears state open and ground wire pile No. information complies fully with anti-error host system setting
Anti-error logical requirements after, ground wire extension tears operation task open and just calculates completion.
Intelligent earth wire electronic switch contact output device describes ground using any one in 1 to 6 electronic switch
The extension of line tears state open, selectable, and Intelligent earth wire electronic switch contact output device describes a ground using 3 electronic switches
The extension of line tears state open, and first electronic switch state indicates enabled and output ground wire pile No., and rear two electronic switch states indicate ground
Line extension tears state open, is described in detail below shown:
000 expression ground wire is to tear state open；
001 indicates that ground wire is extension state, and ground wire pile No. is constant；
010 indicates that ground wire is extension state, and ground wire pile No. is constant；
011 indicates that state of ground wire is abnormal；
100 expression ground wires are to tear state open；
101 indicate that ground wire is extension state, and ground wire pile No. changes；
110 indicate that ground wire is extension state, and ground wire pile No. changes；
111 indicate that state of ground wire is abnormal.
Intelligent earth wire electronic switch contact output device describes ground wire pile No. information using at least 6 electronic switches, can
Selection, Intelligent earth wire electronic switch contact output device describes ground wire pile No. information using 12 electronic switches, at most may be used
To describe 4096 ground wire pile No..Earth wire is realized by above system and its working method hang tear the isolation of state open and adopt
Collection, while being grounded linear state intelligent management, reduces costs, improves the network information security.
More than, embodiments of the present invention are illustrated.But the present invention is not limited to above embodiment.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (24)
1. a kind of ground line extension tears wireless collection electronic switch shielding system open, including anti-error host, Intelligent earth wire electronic switch connect
Point inputting device, Intelligent earth wire electronic switch contact output device, state of ground wire acquisition device, the state of ground wire acquisition device
State of ground wire data are transferred to the Intelligent earth wire electronic switch contact output device, the Intelligent earth wire electronic switch contact
Collected state of ground wire data are converted the output of electronic switch contact, the Intelligent earth wire electronic switch contact by output device
Input unit receives the state of ground wire data from the Intelligent earth wire electronic switch contact output device, and by state of ground wire number
According to being transferred to the anti-error host.
2. ground line extension according to claim 1 tears wireless collection electronic switch shielding system open, which is characterized in that describedly
Line state data packets include ground wire extension and tear status data and ground wire pile No. information data open.
3. ground line extension according to claim 2 tears wireless collection electronic switch shielding system open, which is characterized in that the intelligence
Energy ground wire electronic switch contact input device includes that ground wire extension tears state open entry loop terminal and ground wire pile No. information open entry loop open
Terminal acquires the ground wire extension provided by the Intelligent earth wire electronic switch contact output device and tears state and ground wire pile No. Information Number open
According to.
4. ground line extension according to claim 2 or 3 tears wireless collection electronic switch shielding system open, which is characterized in that institute
Stating Intelligent earth wire electronic switch contact output device includes that ground wire hangs the state of tearing open and outputs loop terminals and ground wire pile No. information is outputed
Loop terminals.
5. ground line extension according to claim 4 tears wireless collection electronic switch shielding system open, which is characterized in that ground wire is hung
The state of tearing open outputs circuit and ground wire pile No. information outputs circuit using electronic switch.
6. ground line extension according to claim 5 tears wireless collection electronic switch shielding system open, which is characterized in that the electricity
Sub switch includes zener diode, triode, metal-oxide-semiconductor and resistance-capacitance circuit, by by the electronic switch output+24V voltage or
The transmission of state of ground wire is realized without output.
7. ground line extension according to claim 6 tears wireless collection electronic switch shielding system open, which is characterized in that pass through institute
The I/O output level for stating the MCU in Intelligent earth wire electronic switch contact output device controls the electronic switch output+24V electricity
It presses or without output.
8. ground line extension according to claim 6 or 7 tears wireless collection electronic switch shielding system open, which is characterized in that institute
State the drain series forward diode of metal-oxide-semiconductor in electronic switch.
9. ground line extension according to claim 1 to 8 tears wireless collection electronic switch shielding system, feature open
It is, the Intelligent earth wire electronic switch contact output device is torn open using 1 to 6 electronic switch contact to describe the extension of ground wire
State.
10. ground line extension according to claim 1 to 8 tears wireless collection electronic switch shielding system, feature open
It is, the Intelligent earth wire electronic switch contact output device tears state open using 3 electronic switch contacts to describe the extension of ground wire.
11. ground line extension according to claim 1 to 10 tears wireless collection electronic switch shielding system open, special
Sign is that the Intelligent earth wire electronic switch contact output device describes ground wire pile No. using at least 6 electronic switch contacts
Information.
12. ground line extension according to claim 1 to 10 tears wireless collection electronic switch shielding system open, special
Sign is that the Intelligent earth wire electronic switch contact output device describes ground wire pile No. letter using 12 electronic switch contacts
Breath.
13. a kind of ground line extension tears wireless collection electronic switch shielding system working method open, including is acquired and filled by state of ground wire
Acquisition ground line real-time status is set, state of earth wire is transferred to by Intelligent earth wire electronic switch by wired or wireless transmission mode
Collected state of ground wire data are converted electronics by contact output device, the Intelligent earth wire electronic switch contact output device
Make and break contact output, the Intelligent earth wire electronic switch contact input device are received from the Intelligent earth wire electronic switch contact
The state of ground wire data of output device, and state of ground wire data are transferred to the anti-error host, the anti-error host is according to system
Uniting, linear state carries out logic judgment to the anti-mis-logical being arranged over the ground, issues alarm signal to the ground wire for not meeting logical requirements.
14. ground line extension according to claim 13 tears wireless collection electronic switch shielding system working method, feature open
It is, the state of ground wire data include that ground wire extension tears status data and ground wire pile No. information data open.
15. ground line extension according to claim 14 tears wireless collection electronic switch shielding system working method, feature open
It is, the Intelligent earth wire electronic switch contact input device includes that ground wire extension tears state open entry loop terminal and ground wire pile No. letter open
Open entry loop terminal is ceased, the ground wire extension provided by the Intelligent earth wire electronic switch contact output device is provided and tears state and ground wire open
Pile No. information data.
16. ground line extension according to claim 14 or 15 tears wireless collection electronic switch shielding system working method open,
It is characterized in that, the Intelligent earth wire electronic switch contact output device includes that the ground wire extension state of tearing open outputs loop terminals and earth wire pile
Number information outputs loop terminals.
17. ground line extension according to claim 16 tears wireless collection electronic switch shielding system working method, feature open
It is, the ground wire extension state of tearing open outputs circuit and ground wire pile No. information outputs circuit using electronic switch.
18. ground line extension according to claim 17 tears wireless collection electronic switch shielding system working method, feature open
It is, the electronic switch includes zener diode, triode, metal-oxide-semiconductor and resistance-capacitance circuit, by being exported by the electronic switch
+ 24V voltage or the transmission that state of ground wire is realized without output.
19. ground line extension according to claim 18 tears wireless collection electronic switch shielding system working method, feature open
It is, the electronic switch is controlled by the I/O output level of the MCU in the Intelligent earth wire electronic switch contact output device
Output+24V voltage or without output.
20. the extension of ground line described in 8 or 19 tears wireless collection electronic switch shielding system working method open according to claim 1,
It is characterized in that, the drain series forward diode of metal-oxide-semiconductor in the electronic switch.
21. the extension of ground line described in any one of 3-20 tears the work of wireless collection electronic switch shielding system open according to claim 1
Method, which is characterized in that the Intelligent earth wire electronic switch contact output device is retouched using 1 to 6 electronic switch contact
The extension for stating ground wire tears state open.
22. the extension of ground line described in any one of 3-21 tears the work of wireless collection electronic switch shielding system open according to claim 1
Method, which is characterized in that the Intelligent earth wire electronic switch contact output device describes ground wire using 3 electronic switch contacts
Extension tear state open.
23. the extension of ground line described in any one of 3-22 tears the work of wireless collection electronic switch shielding system open according to claim 1
Method, which is characterized in that the Intelligent earth wire electronic switch contact output device is described using at least 6 electronic switch contacts
Ground wire pile No. information.
24. the extension of ground line described in any one of 3-23 tears the work of wireless collection electronic switch shielding system open according to claim 1
Method, which is characterized in that the Intelligent earth wire electronic switch contact output device describes ground using 12 electronic switch contacts
Line pile No. information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308656.2A CN110011651A (en) | 2019-04-17 | 2019-04-17 | A kind of ground line extension tears wireless collection electronic switch shielding system and its working method open |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308656.2A CN110011651A (en) | 2019-04-17 | 2019-04-17 | A kind of ground line extension tears wireless collection electronic switch shielding system and its working method open |
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