CN106096591B - Hand exercise signal acquiring system based on flexible circuit - Google Patents
Hand exercise signal acquiring system based on flexible circuit Download PDFInfo
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- CN106096591B CN106096591B CN201610573696.6A CN201610573696A CN106096591B CN 106096591 B CN106096591 B CN 106096591B CN 201610573696 A CN201610573696 A CN 201610573696A CN 106096591 B CN106096591 B CN 106096591B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/20—Movements or behaviour, e.g. gesture recognition
- G06V40/28—Recognition of hand or arm movements, e.g. recognition of deaf sign language
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/30—Noise filtering
-
- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
- G16H50/20—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems
Abstract
In order to realize the accurate measurements of high-precision hand slight amplitude signal with lower cost, the present invention provides a kind of hand exercise signal acquiring system based on flexible circuit, comprising: flexible detection circuit and Signal Pretreatment unit；Wherein the Signal Pretreatment unit includes small signals amplification unit, to amplify to the signal obtained by Phase Processing.The present invention can be improved signal-to-noise ratio when small signals amplification processing, and reduce the power consumption of small signals amplification interlock circuit.
Description
Technical field
The present invention relates to Technique of Weak Signal Detection fields, transport more particularly, to a kind of hand based on flexible circuit
Dynamic signal acquiring system.
Background technique
During rehabilitation medical, the hand exercise signal pickup assembly of the usually used external import of researcher, to people
The hand exercise ability of body carries out real-time monitoring, but due to most rehabilitation medicals during, for hand bending, digital flexion etc.
The lesser situation of amplitude, the signal monitored is very faint, and be highly susceptible to human peripheral to be detected other medical treatment
The white noise acoustic jamming of instrument generates distortion in phase, therefore is often difficult to accurately reflect in the signal that the initial stage monitors
The accurate hand recovery of subjects.
In addition, the hand exercise signal pickup assembly of external import (such as adopt by the medical signal of the companies such as Siemens, Toshiba
Collecting system) it is often expensive, so that the acquisition and monitoring of hand exercise signal are at high price, to hinder rehabilitation medical
Development.
Summary of the invention
In order to realize that (so-called " slight amplitude " of the invention is often referred to high-precision hand slight amplitude with lower cost
Motion amplitude of the position to be monitored in its direction of motion is greater than 2mm and less than the accurate measurements of 15mm) signal, and the present invention provides
A kind of hand exercise signal acquiring system based on flexible circuit, comprising:
Flexible detection circuit, wherein acquisition hand exercise signal；
Signal Pretreatment unit, for being pre-processed to the analog signal.
Further, the flexible detection circuit includes motion detection sensing unit, for detecting hand exercise generation
Analog signal.
Further, the motion detection sensing unit includes that list is opened in motor message detection unit and motor message detection
Member, the motor message detects opening unit and exports START signal to the small signals amplification unit, and wherein the signal is pre-
Processing unit includes small signals amplification unit, to amplify to the signal obtained by Phase Processing.
Further, the motor message detection unit includes:
Move distance sensor array, for the traveling detection detected part movement in the movement direction of array away from
From.
Further, the motor message detection opening unit includes:
Acceleration transducer array, for detecting the acceleration information of detected part in an array manner；
Angular transducer array, for detecting the angle change information of detected part in an array manner.
Further, the Signal Pretreatment unit includes small signals amplification unit and A/D converting unit, and the A/D turns
Change unit for process pretreated analog signal be converted into digital signal.
Further, the small signals amplification unit includes two-stage signal amplifying unit, two-stage phasing unit and two
Grade signal filter unit.
Further, the small signals amplification unit includes:
First signal filter unit, for carrying out first order filtering processing to the analog signal；
First signal amplification unit, for carrying out first order enhanced processing to the analog signal；
First phase adjustment unit, for by first order filtering processing and the obtained signal of first order enhanced processing into
Row first order phase adjustment；
Second signal filter unit, for carrying out second level filtering to the signal obtained by first order phase adjustment；
Second signal amplifying unit, for the signal by first order filtering and the signal filtered by the second level
Carry out second level enhanced processing.
Further, the move distance sensor array includes infrared displacement sensor array.
Further, the A/D converting unit uses ADS7825.
Further, the acceleration transducer array uses three dimension acceleration sensor.
The invention has the benefit that
(1) it can be reduced in small-signal amplification process based on phase transition and signal processing, it may be as caused by noise
Interference, to improve signal-to-noise ratio when small signals amplification processing.
(2) judge whether detected part is really subjected to displacement or angle according to moving relevant sensor output signal summation
Change, and using this signal as the switching signal of small signals amplification device, so that the power consumption of small signals amplification interlock circuit is reduced,
The service life of instrumentation amplifier is extended, and then extends the use of the entirely hand exercise signal acquiring system based on flexible circuit
Service life.
Detailed description of the invention
Fig. 1 shows the composition block diagram of the hand exercise signal acquiring system according to the present invention based on flexible circuit.
Fig. 2 shows the circuit diagrams of small signals amplification unit according to the present invention.
Specific embodiment
As shown in Figure 1, preferred embodiment in accordance with the present invention, the hand exercise signal acquiring system packet based on flexible circuit
It includes:
Flexible detection circuit, wherein acquisition hand exercise signal；
Signal Pretreatment unit, for being pre-processed to the analog signal.
The flexibility detection circuit includes motion detection sensing unit, for detecting the analog signal of hand exercise generation.
Preferred embodiment in accordance with the present invention, the motion detection sensing unit include motor message detection unit and movement
Signal detection opening unit, the motor message detect opening unit and export START signal to the small signals amplification unit, and
Wherein the Signal Pretreatment unit includes small signals amplification unit, to put to the signal obtained by Phase Processing
Greatly.
The motor message detection unit includes move distance sensor array, for detecting portion to be measured with the traveling of array
The move distance of position in the movement direction.The move distance sensor is for example, by using infrared displacement sensor, to detect finger etc.
The moving distance of detected part.The move distance sensor array is made of with a matrix type multiple move distance sensors,
For detected parts with different geometries and size such as detection finger, wrist, waists.
Preferred embodiment in accordance with the present invention, the starting of the motor message detection unit is by specific open signal
Control.Specifically, which is generated by motor message detection opening unit, and motor message detection opening unit includes:
Acceleration transducer array, for detecting the acceleration information of detected part in an array manner；
Angular transducer array, for detecting the angle change information of detected part in an array manner；
Comparison circuit, for determining that the output signal of the acceleration transducer array and the angular transducer array is
No is more than preset threshold；
AND gate circuit, for the output signal according to the comparison circuit, to the acceleration transducer array and described
The output signal of angular transducer array carries out and operation.
Above-mentioned acceleration transducer array and angular transducer array are respectively by multiple acceleration transducers and multiple angles
Sensor is constituted in an array manner.The specific structure of its matrix form can be according to the different geometries and ruler of detected part
Very little formation.Preferably, the acceleration transducer array uses three dimension acceleration sensor, and the angular transducer uses top
Spiral shell instrument angularly sensor.
Compare when comparison circuit passes through, determines what the acceleration transducer array and the angular transducer array exported
When acceleration value and angle change value are more than preset threshold (for example, 2 ° of acceleration > 0, angle change >), motor message inspection
The AND gate circuit for surveying opening unit will be exported to Signal Pretreatment unit is greater than 0.7V DC voltage as START signal.
The Signal Pretreatment unit includes small signals amplification unit and A/D converting unit, and the A/D converting unit is used for
Digital signal is converted into pretreated analog signal is passed through.Preferred embodiment in accordance with the present invention, the A/D converting unit are adopted
Use ADS7825.
The small signals amplification unit includes two-stage signal amplifying unit, two-stage phasing unit and two-stage signal filtering
Unit.Specifically, the circuit diagram of the small signals amplification unit is as shown in Figure 2, comprising:
First signal filter unit, for carrying out first order filtering processing to the analog signal；
First signal amplification unit, for carrying out first order enhanced processing to the analog signal；
First phase adjustment unit, for by first order filtering processing and the obtained signal of first order enhanced processing into
Row first order phase adjustment；
Second signal filter unit, for carrying out second level filtering to the signal obtained by first order phase adjustment；
Second signal amplifying unit, for the signal by first order filtering and the signal filtered by the second level
Carry out second level enhanced processing.
The move distance sensor array includes infrared displacement sensor array.
As shown in Fig. 2, the small signals amplification unit includes: 15k Ω resistance, 20k Ω resistance, 50k Ω resistance, 1M Ω electricity
Resistance, 90 ° of phase shifters, 180 ° of phase shifters, the first operational amplifier, second operational amplifier, third operational amplifier, the 4th operation
Amplifier, the 5th operational amplifier, the first transistor, second transistor, third transistor, the 4th transistor, the 5th transistor,
6th transistor, the 7th transistor, the 8th transistor, the 9th transistor, the tenth transistor, first capacitor device, the second capacitor,
Third capacitor, the 4th capacitor, the first nor gate, the second nor gate, the first NAND gate and the second NAND gate, wherein institute
The signal input part for stating small signals amplification unit connects the first end of the 15k Ω resistance and the input terminal of 90 ° of phase shifters,
The second end connection inverting input terminal of second operational amplifier of 15k Ω resistance, the normal phase input end of the first operational amplifier, the
The first end of one capacitor and the base stage of the first transistor, the second end ground connection of the first capacitor device, the first operation amplifier
The output end of device connects the first input end of the first NAND gate and the first input end of the first nor gate, the hair of the first transistor
Emitter-base bandgap grading connects the collector of second transistor, the collector of the emitter connection third transistor of second transistor, third crystal
The base stage of pipe and the emitter of third transistor connect, the anti-phase input of the base stage connection third operational amplifier of second transistor
End, the emitter of second transistor connect the inverting input terminal of the first operational amplifier, the emitter connection of third transistor the
Second input terminal of one NAND gate and the second input terminal of the first nor gate, and connect the first end of 50k Ω resistance, 50k Ω electricity
The second end of resistance connects the first end of the second capacitor, the second end ground connection of the second capacitor, and the first end of the second capacitor connects
Connect the base stage of the 5th transistor, the collector of the first transistor connects the emitter and third operational amplifier of the 8th transistor
Inverting input terminal, the output end of the first NAND gate connect the collector of the 4th transistor, and the emitter of the 4th transistor connects respectively
Two input terminals of the second nor gate are connect, the output end of the first nor gate connects the collector of the 5th transistor, the 5th transistor
Emitter connect the second NAND gate two input terminals, the first nor gate output end connection third capacitor first end and
The normal phase input end of second operational amplifier, the second end ground connection of third capacitor, the output end of the second NAND gate connect third
The first end of the normal phase input end of operational amplifier and the 4th capacitor, the second end ground connection of the 4th capacitor, the second operation are put
The output end of big device connects the collector of the 7th transistor and the normal phase input end of four-operational amplifier, third operation amplifier
The output end of device connects the collector of the 6th transistor and the inverting input terminal of the 5th operational amplifier, the 6th transistor and the 7th
The base stage of transistor is connected with each other, and the inverting input terminal of the emitter connection four-operational amplifier of the 6th transistor, the 7th is brilliant
The emitter of body pipe connects the normal phase input end of the 5th operational amplifier, and the output end of four-operational amplifier connects the 9th crystal
The first end of pipe, the base stage of the 8th transistor connect power end, and the collector of the 8th transistor passes through 20k Ω resistance eutral grounding, the
The collector of eight transistors connects the output end of the 5th operational amplifier, the output end of four-operational amplifier by 1M Ω resistance
Connect the collector of the 9th transistor, the base stage of the 9th transistor connects the output end and 180 ° of phase shifters of 90 ° of phase shifters
Input terminal, the emitter of the 9th transistor connect the collector of the tenth transistor, and the output end connection the tenth of 180 ° of phase shifters is brilliant
The base stage of body pipe, the emitter of the tenth transistor connect the signal output end of the small signals amplification unit, the 4th crystal
The base stage of pipe connects START signal.
Preferred embodiment in accordance with the present invention, the first capacitor device are 0.1uF capacitor, and second capacitor is
0.22uF capacitor, the third capacitor are 0.47uF capacitor, and the 4th capacitor is 0.31uF capacitor, the electricity
Source is+5V DC power supply VCC.Above-mentioned each operational amplifier uses instrumentation amplifier.
Above for the purpose that narration made by presently preferred embodiments of the present invention is to illustrate, and it is not intended to limit essence of the invention
Really it is disclosed form, learns and make an amendment or change to be possible based on above introduction or from the embodiment of the present invention
, embodiment is to explain the principle of the present invention and those skilled in the art being allowed to exist with various embodiments using the present invention
It is selected in practical application and narration, technical idea attempt of the invention is determined by claim and its equalization.
Claims (4)
1. a kind of hand exercise signal acquiring system based on flexible circuit, comprising:
Flexible detection circuit, wherein acquisition hand exercise signal；
The flexibility detection circuit includes motion detection sensing unit, for detecting the analog signal of hand exercise generation；
Signal Pretreatment unit, for being pre-processed to the analog signal；
The motion detection sensing unit includes motor message detection unit and motor message detection opening unit, and wherein described
Signal Pretreatment unit includes small signals amplification unit and A/D converting unit, and the small signals amplification unit is to by phase
The signal that position processing obtains amplifies, and the motor message detection opening unit is exported to the small signals amplification unit
START signal；
The motor message detection unit includes:
Move distance sensor array, for the move distance with the traveling detection detected part of array in the movement direction；
The motor message detects opening unit
Acceleration transducer array, for detecting the acceleration information of detected part in an array manner；
Angular transducer array, for detecting the angle change information of detected part in an array manner；
The Signal Pretreatment unit includes small signals amplification unit, and the small signals amplification unit includes that two-stage signal amplification is single
Member, two-stage phasing unit and two-stage signal filter unit；
The small signals amplification unit includes:
First signal filter unit, for carrying out first order filtering processing to the analog signal；
First signal amplification unit, for carrying out first order enhanced processing to the analog signal；
First phase adjustment unit, for carrying out the to by first order filtering processing and the obtained signal of first order enhanced processing
First order phase adjustment；
Second signal filter unit, for carrying out second level filtering to the signal obtained by first order phase adjustment；
Second signal amplifying unit, for being carried out to the signal by first order filtering and by the signal that the second level filters
Second level enhanced processing；
It is characterized in that, the small signals amplification unit include: 15k Ω resistance, 20k Ω resistance, 50k Ω resistance, 1M Ω resistance,
90 ° of phase shifters, 180 ° of phase shifters, the first operational amplifier, second operational amplifier, third operational amplifier, the 4th operation are put
Big device, the 5th operational amplifier, the first transistor, second transistor, third transistor, the 4th transistor, the 5th transistor, the
Six transistors, the 7th transistor, the 8th transistor, the 9th transistor, the tenth transistor, first capacitor device, the second capacitor,
Three capacitors, the 4th capacitor, the first nor gate, the second nor gate, the first NAND gate and the second NAND gate, wherein described
The signal input part of small signals amplification unit connects the first end of the 15k Ω resistance and the input terminal of 90 ° of phase shifters, 15k
The second end of Ω resistance connects the inverting input terminal of second operational amplifier, the normal phase input end of the first operational amplifier, first
The first end of capacitor and the base stage of the first transistor, the second end ground connection of the first capacitor device, the first operational amplifier
Output end connect the first NAND gate first input end and the first nor gate first input end, the transmitting of the first transistor
Pole connects the collector of second transistor, the collector of the emitter connection third transistor of second transistor, third transistor
Base stage and the emitter of third transistor connect, the anti-phase input of the base stage of second transistor connection third operational amplifier
End, the emitter of second transistor connect the inverting input terminal of the first operational amplifier, the emitter connection of third transistor the
Second input terminal of one NAND gate and the second input terminal of the first nor gate, and connect the first end of 50k Ω resistance, 50k Ω electricity
The second end of resistance connects the first end of the second capacitor, the second end ground connection of the second capacitor, and the first end of the second capacitor connects
Connect the base stage of the 5th transistor, the collector of the first transistor connects the emitter and third operational amplifier of the 8th transistor
Inverting input terminal, the output end of the first NAND gate connect the collector of the 4th transistor, and the emitter of the 4th transistor connects respectively
Two input terminals of the second nor gate are connect, the output end of the first nor gate connects the collector of the 5th transistor, the 5th transistor
Emitter connect the second NAND gate two input terminals, the first nor gate output end connection third capacitor first end and
The normal phase input end of second operational amplifier, the second end ground connection of third capacitor, the output end of the second NAND gate connect third
The first end of the normal phase input end of operational amplifier and the 4th capacitor, the second end ground connection of the 4th capacitor, the second operation are put
The output end of big device connects the collector of the 7th transistor and the normal phase input end of four-operational amplifier, third operation amplifier
The output end of device connects the collector of the 6th transistor and the inverting input terminal of the 5th operational amplifier, the 6th transistor and the 7th
The base stage of transistor is connected with each other, and the inverting input terminal of the emitter connection four-operational amplifier of the 6th transistor, the 7th is brilliant
The emitter of body pipe connects the normal phase input end of the 5th operational amplifier, and the output end of four-operational amplifier connects the 9th crystal
The first end of pipe, the base stage of the 8th transistor connect power end, and the collector of the 8th transistor passes through 20k Ω resistance eutral grounding, the
The collector of eight transistors connects the output end of the 5th operational amplifier, the output end of four-operational amplifier by 1M Ω resistance
Connect the collector of the 9th transistor, the base stage of the 9th transistor connects the output end and 180 ° of phase shifters of 90 ° of phase shifters
Input terminal, the emitter of the 9th transistor connect the collector of the tenth transistor, and the output end connection the tenth of 180 ° of phase shifters is brilliant
The base stage of body pipe, the emitter of the tenth transistor connect the signal output end of the small signals amplification unit, the 4th crystal
The base stage of pipe connects START signal；
The first capacitor device is 0.1uF capacitor, and second capacitor is 0.22uF capacitor, and the third capacitor is
0.47uF capacitor, the 4th capacitor are 0.31uF capacitor, and the power supply is+5V DC power supply VCC；Above-mentioned each operation
Amplifier uses instrumentation amplifier.
2. the hand exercise signal acquiring system according to claim 1 based on flexible circuit, which is characterized in that the fortune
Dynamic range sensor array includes infrared displacement sensor array.
3. the hand exercise signal acquiring system according to claim 2 based on flexible circuit, which is characterized in that the A/
D conversion unit uses ADS7825.
4. the hand exercise signal acquiring system according to claim 3 based on flexible circuit, which is characterized in that described to add
Velocity sensor array uses three dimension acceleration sensor.
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| CN201610573696.6A CN106096591B (en) | 2016-07-20 | 2016-07-20 | Hand exercise signal acquiring system based on flexible circuit |
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| CN106096591B true CN106096591B (en) | 2019-04-16 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102138860A (en) * | 2011-01-10 | 2011-08-03 | 西安交通大学 | Intelligentized rehabilitation training equipment for hand functions of patients suffering from cerebral injury |
| CN102499690A (en) * | 2011-10-11 | 2012-06-20 | 江苏德长医疗科技有限公司 | Gait detection device of foot drop corrector |
| CN102927899A (en) * | 2012-10-08 | 2013-02-13 | 东南大学 | Flexible shoulder joint motion sensor and measurement method thereof |
| CN103479362A (en) * | 2013-09-05 | 2014-01-01 | 南京邮电大学 | Motor function rehabilitation monitoring system based on wireless body area network |
| CN203786666U (en) * | 2014-02-11 | 2014-08-20 | 浙江大学医学院附属第一医院 | Acquisition and transmission system for hand motion signals |
| CN104215363A (en) * | 2014-09-05 | 2014-12-17 | 浙江大学 | Soft tactile-slip sensation composite sensing array based on pressure-sensitive conductive rubber |
| CN105004453A (en) * | 2015-08-04 | 2015-10-28 | 安德润普科技开发（深圳）有限公司 | Pressure monitoring method and pressure monitoring system for intelligent pressure pads |
| CN105326513A (en) * | 2015-12-01 | 2016-02-17 | 岳凯 | Real-time monitoring system and method for lower-limb rehabilitation movement |
-
2016
- 2016-07-20 CN CN201610573696.6A patent/CN106096591B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102138860A (en) * | 2011-01-10 | 2011-08-03 | 西安交通大学 | Intelligentized rehabilitation training equipment for hand functions of patients suffering from cerebral injury |
| CN102499690A (en) * | 2011-10-11 | 2012-06-20 | 江苏德长医疗科技有限公司 | Gait detection device of foot drop corrector |
| CN102927899A (en) * | 2012-10-08 | 2013-02-13 | 东南大学 | Flexible shoulder joint motion sensor and measurement method thereof |
| CN103479362A (en) * | 2013-09-05 | 2014-01-01 | 南京邮电大学 | Motor function rehabilitation monitoring system based on wireless body area network |
| CN203786666U (en) * | 2014-02-11 | 2014-08-20 | 浙江大学医学院附属第一医院 | Acquisition and transmission system for hand motion signals |
| CN104215363A (en) * | 2014-09-05 | 2014-12-17 | 浙江大学 | Soft tactile-slip sensation composite sensing array based on pressure-sensitive conductive rubber |
| CN105004453A (en) * | 2015-08-04 | 2015-10-28 | 安德润普科技开发（深圳）有限公司 | Pressure monitoring method and pressure monitoring system for intelligent pressure pads |
| CN105326513A (en) * | 2015-12-01 | 2016-02-17 | 岳凯 | Real-time monitoring system and method for lower-limb rehabilitation movement |
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