CN206638242U - A kind of interface circuit of Campatible sensor - Google Patents
A kind of interface circuit of Campatible sensor Download PDFInfo
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- CN206638242U CN206638242U CN201720389292.1U CN201720389292U CN206638242U CN 206638242 U CN206638242 U CN 206638242U CN 201720389292 U CN201720389292 U CN 201720389292U CN 206638242 U CN206638242 U CN 206638242U
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Abstract
The utility model discloses a kind of interface circuit of Campatible sensor, including sensor detection circuit, differential amplifier circuit and signal output apparatus, sensor detection circuit includes test using capacitance sensor module and resistance sensor detection module, sensor detection circuit connects differential amplifier circuit, differential amplifier circuit connects signal output apparatus, the utility model structural principle is simple, strong antijamming capability, the sensor detection circuit accuracy of detection of use is high, can compatible resistance-type and capacitance type sensor, improve the reliability and stability of circuit.
Description
Technical field
The present invention relates to technical field of motors, specially a kind of interface circuit of Campatible sensor.
Background technology
Capacitance type sensor utilizes capacitor principle, and non electrical quantity to be measured in external environment is converted into capacitance, then will
The change of capacitance is converted to the output quantities such as voltage, frequency, is widely used in pressure, humidity, acceleration, displacement, gas
Deng in detection.Dynamometry that resistance sensor forms with corresponding measuring circuit, pressure measurement, weigh, displacement, acceleration, moment of torsion
It is that the departments such as metallurgy, electric power, traffic, petrochemical industry, business, biomedicine and national defence are weighed automatically, process is examined etc. measuring instrumentss
Survey and realize one of indispensable instrument of Automation of Manufacturing Process.Sensor interface circuitry compatibility performance of the prior art
Difference, cause detection efficiency low.
The content of the invention
It is an object of the invention to provide a kind of interface circuit of Campatible sensor, to solve to carry in above-mentioned background technology
The problem of going out.
To achieve the above object, the present invention provides following technical scheme：A kind of interface circuit of Campatible sensor, bag
Sensor detection circuit, differential amplifier circuit and signal output apparatus are included, the sensor detection circuit passes including condenser type
Sensor detection module and resistance sensor detection module, the sensor detection circuit connect differential amplifier circuit, the difference
Divide amplifying circuit connection signal output apparatus.
Preferably, the test using capacitance sensor module include the first field-effect transistor, the second field-effect transistor,
3rd field-effect transistor and the 4th field-effect transistor, the first field-effect transistor source electrode connect the 3rd field effect transistor
Pipe drains, and the 3rd field effect transistor gate connects clock detection module, and source electrode connects one input of amplifier respectively
With electric capacity A one end, electric capacity A other ends ground connection, electric capacity A both ends parallel resistance A, first field-effect transistor drain electrode connection the
Two field-effect transistors drain, and the second field-effect transistor source electrode connects the 4th field-effect transistor and drained, and the described 4th
Field effect transistor gate connects clock detection module, and source electrode connects another input of amplifier and electric capacity B one end, electric capacity respectively
The B other ends are grounded, electric capacity B both ends parallel resistance B, amplifier out connection AD conversion module.
Preferably, the resistance sensor detection module includes triode, analog-digital converter and microprocessor, three poles
Pipe emitter stage connects power end, and colelctor electrode connects thermistor one end and analog-digital converter vdd terminal, the thermistor respectively
The other end connects resistance D one end and analog-digital converter IN- ends, resistance D other ends ground connection, the analog-digital converter IN+ respectively
End connection vdd terminal, the analog-digital converter REF ends connection IN- ends, the analog-digital converter SCLK ends connection microprocessor SCK
End, analog-digital converter DOUT ends connection microprocessor I/O2 ends, analog-digital converter CNVST ends connection microprocessor MISO ends, mould
Number converter GND ends connection microprocessor GND ends, microprocessor I/01 ends connection resistance C one end, resistance C other ends connection three
Pole pipe base stage, electric capacity C is accessed between the microprocessor GND ends and vdd terminal.
Preferably, the differential amplifier circuit includes the first integrated transporting discharging, the second integrated transporting discharging, the 3rd integrated transporting discharging and the
Four integrated transporting dischargings, the first integrated transporting discharging negative input connect signal input part, and electrode input end connects resistance E mono- respectively
End, resistance F one end and the second integrated transporting discharging negative input, it is another that the first integrated transporting discharging output end connects resistance E respectively
One end, electric capacity D one end, electric capacity D other ends connection resistance G one end, it is defeated that the resistance G other ends connect the 3rd integrated transporting discharging negative pole respectively
Enter end and resistance I one end, the second integrated transporting discharging electrode input end ground connection, output end connects the resistance F other ends and electricity respectively
Hold E one end, electric capacity E other ends connection resistance H one end, the resistance H other ends connect respectively the 3rd integrated transporting discharging electrode input end and
Resistance L one end, resistance L other ends ground connection, the 3rd integrated transporting discharging output end connect the resistance I other ends and the 4th and integrated respectively
Amplifier electrode input end, the 4th integrated transporting discharging negative input connect resistance J one end and resistance K one end respectively, and resistance J is another
One end is grounded, and the resistance K other ends connect the 4th integrated transporting discharging output end and connect signal output part.
Compared with prior art, the beneficial effects of the invention are as follows：
（1）Structural principle of the present invention is simple, strong antijamming capability, and the sensor detection circuit accuracy of detection of use is high, energy
Enough compatible resistance-types and capacitance type sensor, improve the reliability and stability of circuit.
（2）The test using capacitance sensor module and resistance sensor detection module that the present invention uses, its accuracy of detection
High, low in energy consumption, reliability is high.
（3）The differential amplifier circuit strong antijamming capability that the present invention uses, can be amplified to small-signal, improve
Signal output efficiency.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the test using capacitance sensor module principle figure of the present invention；
Fig. 3 is the resistance sensor detection module schematic diagram of the present invention；
Fig. 4 is the differential amplifier circuit schematic diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1-4 are referred to, the present invention provides a kind of technical scheme：A kind of interface circuit of Campatible sensor, including pass
Sensor detection circuit 1, differential amplifier circuit 2 and signal output apparatus 3, the sensor detection circuit 1 pass including condenser type
Sensor detection module 4 and resistance sensor detection module 5, the sensor detection circuit 1 connect differential amplifier circuit 2, institute
State differential amplifier circuit 2 and connect signal output apparatus 3.
In the present embodiment, test using capacitance sensor module 4 includes the first field-effect transistor 6, the second field effect transistor
Pipe 7, the 3rd field-effect transistor 8 and the 4th field-effect transistor 9, the source electrode of the first field-effect transistor 6 connect the 3rd
Effect transistor 8 drains, and the grid of the 3rd field-effect transistor 8 connection clock detection module 10, source electrode connects amplification respectively
11 1 inputs of device and electric capacity A1b one end, electric capacity A1b other ends ground connection, electric capacity A1b both ends parallel resistance A1a, described first
Drain electrode the second field-effect transistor 7 of connection of field-effect transistor 6 drains, the source electrode of the second field-effect transistor 7 connection the 4th
Field-effect transistor 9 drains, and the grid of the 4th field-effect transistor 9 connection clock detection module 10, source electrode connects put respectively
Big 11 another input of device and electric capacity B2b one end, electric capacity B2b other ends ground connection, electric capacity B2b both ends parallel resistance B2a, amplifier
11 output ends connect AD conversion module 12.
In the present embodiment, resistance sensor detection module 5 includes triode 13, analog-digital converter 14 and microprocessor
15, the emitter stage of triode 13 connection power end, colelctor electrode connects the one end of thermistor 16 and the VDD of analog-digital converter 14 respectively
End, the other end of thermistor 16 connects resistance D4a one end respectively and the IN- ends of analog-digital converter 14, resistance D4a are another
End ground connection, the IN+ ends of analog-digital converter 14 connect vdd terminal, the REF ends of the analog-digital converter 14 connection IN- ends, the mould
The SCLK ends of number converter 14 connection microprocessor 15 SCK ends, the DOUT ends of analog-digital converter 14 connection microprocessor 15 I/O2
End, the CNVST ends of analog-digital converter 14 connection microprocessor 15 MISO ends, the GND ends of analog-digital converter 14 connection microprocessor 15
GND ends, the I/01 ends of microprocessor 15 connection resistance C3a one end, the base stage of resistance C3a other ends connecting triode 13, micro- place
Manage and electric capacity C3b is accessed between the GND ends of device 15 and vdd terminal.
The test using capacitance sensor module and resistance sensor detection module that the present invention uses, its accuracy of detection height,
Low in energy consumption, reliability is high.
In addition, in the present embodiment, differential amplifier circuit 2 includes the first integrated transporting discharging 16, the second integrated transporting discharging the 17, the 3rd collects
Into the integrated transporting discharging 19 of amplifier 18 and the 4th, the negative input of the first integrated transporting discharging 16 connects signal input part, positive pole input
End connects resistance E5a one end, resistance F6a one end and the negative input of the second integrated transporting discharging 17, the described first integrated fortune respectively
Put 16 output ends and connect the resistance E5a other ends, electric capacity D4b one end, electric capacity D4b other ends connection resistance G7a one end, resistance respectively
The G7a other ends connect the negative input of the 3rd integrated transporting discharging 18 and resistance I9a one end, the positive pole of the second integrated transporting discharging 17 respectively
Input end grounding, output end connect the resistance F6a other ends and electric capacity E5b one end, electric capacity E5b other ends connection resistance H8a respectively
One end, the resistance H8a other ends connect the electrode input end of the 3rd integrated transporting discharging 18 and resistance L12a one end respectively, and resistance L12a is another
End ground connection, the output end of the 3rd integrated transporting discharging 18 connect the resistance I9a other ends and the input of the positive pole of the 4th integrated transporting discharging 19 respectively
End, the negative input of the 4th integrated transporting discharging 19 connect resistance J10a one end and resistance K11a one end respectively, and resistance J10a is another
One end is grounded, and the resistance K11a other ends connection output end of the 4th integrated transporting discharging 19 simultaneously connects signal output part, using symmetrical more
Level differential amplifier circuit, influence of the individual devices to circuit is reduced as far as possible；In addition using broadband, the integrated transporting discharging core of low noise
Piece, 10 three-stage amplifier is approximately equal to reference to every grade of multiplication factor, so as to ensure that circuit reaches in the multiplication factor of broad frequency band
To more than 1000 times, the differential amplifier circuit strong antijamming capability of the invention used, small-signal can be amplified, improved
Signal output efficiency.
Structural principle of the present invention is simple, strong antijamming capability, and the sensor detection circuit accuracy of detection of use is high, Neng Goujian
Hold resistance-type and capacitance type sensor, improve the reliability and stability of circuit.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of interface circuit of Campatible sensor, including sensor detection circuit, differential amplifier circuit and signal output
Circuit, it is characterised in that：The sensor detection circuit includes test using capacitance sensor module and resistance sensor detects
Module, the sensor detection circuit connect differential amplifier circuit, and the differential amplifier circuit connects signal output apparatus.
A kind of 2. interface circuit of Campatible sensor according to claim 1, it is characterised in that：The capacitive sensing
Device detection module includes the first field-effect transistor, the second field-effect transistor, the 3rd field-effect transistor and the 4th field-effect
Transistor, the first field-effect transistor source electrode connect the drain electrode of the 3rd field-effect transistor, the 3rd field-effect transistor
Grid connects clock detection module, and source electrode connects one input of amplifier and electric capacity A one end respectively, and the electric capacity A other ends are grounded,
Electric capacity A both ends parallel resistance A, the first field-effect transistor drain electrode connection the second field-effect transistor drain electrode, described second
Field-effect transistor source electrode connects the drain electrode of the 4th field-effect transistor, and the 4th field effect transistor gate connects clock detection
Module, source electrode connect another input of amplifier and electric capacity B one end, electric capacity B other ends ground connection, electric capacity B both ends electricity in parallel respectively
Hinder B, amplifier out connection AD conversion module.
A kind of 3. interface circuit of Campatible sensor according to claim 1, it is characterised in that：The resistance-type sensing
Device detection module includes triode, analog-digital converter and microprocessor, transistor emitter connection power end, colelctor electrode difference
Connection thermistor one end and analog-digital converter vdd terminal, the thermistor other end connect resistance D one end and mould respectively
Number converter IN- ends, resistance D other ends ground connection, the analog-digital converter IN+ ends connect vdd terminal, the analog-digital converter REF
End connection IN- ends, the analog-digital converter SCLK ends connection microprocessor SCK ends, analog-digital converter DOUT ends connection microprocessor
Device I/O2 ends, analog-digital converter CNVST ends connection microprocessor MISO ends, analog-digital converter GND ends connection microprocessor GND
End, microprocessor I/01 ends connection resistance C one end, resistance C other end connecting triode base stages, the microprocessor GND ends with
Electric capacity C is accessed between vdd terminal.
A kind of 4. interface circuit of Campatible sensor according to claim 1, it is characterised in that：The differential amplification electricity
Road includes the first integrated transporting discharging, the second integrated transporting discharging, the 3rd integrated transporting discharging and the 4th integrated transporting discharging, and first integrated transporting discharging is born
Pole input connection signal input part, electrode input end connect resistance E one end, resistance F one end and the second integrated transporting discharging respectively
Negative input, the first integrated transporting discharging output end connect the resistance E other ends, electric capacity D one end respectively, and the electric capacity D other ends connect
Connecting resistance G one end, the resistance G other ends connect the 3rd integrated transporting discharging negative input and resistance I one end respectively, and described second is integrated
Amplifier electrode input end is grounded, and output end connects the resistance F other ends and electric capacity E one end, electric capacity E other ends connection resistance H respectively
One end, the resistance H other ends connect the 3rd integrated transporting discharging electrode input end and resistance L one end, resistance L other ends ground connection, institute respectively
State the 3rd integrated transporting discharging output end and connect the resistance I other ends and the 4th integrated transporting discharging electrode input end respectively, the described 4th is integrated
Amplifier negative input connects resistance J one end and resistance K one end respectively, resistance J other ends ground connection, resistance K other ends connection the
Four integrated transporting discharging output ends simultaneously connect signal output part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389292.1U CN206638242U (en) | 2017-04-14 | 2017-04-14 | A kind of interface circuit of Campatible sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389292.1U CN206638242U (en) | 2017-04-14 | 2017-04-14 | A kind of interface circuit of Campatible sensor |
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| Publication Number | Publication Date |
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| CN206638242U true CN206638242U (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720389292.1U Expired - Fee Related CN206638242U (en) | 2017-04-14 | 2017-04-14 | A kind of interface circuit of Campatible sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834982A (en) * | 2017-11-15 | 2018-03-23 | 中国电子科技集团公司第四十研究所 | It is a kind of effectively to suppress device caused by spuious broadband signal |
-
2017
- 2017-04-14 CN CN201720389292.1U patent/CN206638242U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834982A (en) * | 2017-11-15 | 2018-03-23 | 中国电子科技集团公司第四十研究所 | It is a kind of effectively to suppress device caused by spuious broadband signal |
| CN107834982B (en) * | 2017-11-15 | 2020-12-01 | 中国电子科技集团公司第四十一研究所 | Device for effectively inhibiting stray broadband signal generation |
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Granted publication date: 20171114 Termination date: 20180414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |