CN109738671A - A kind of acceleration transducer self-checking circuit - Google Patents
A kind of acceleration transducer self-checking circuit Download PDFInfo
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- CN109738671A CN109738671A CN201811492156.0A CN201811492156A CN109738671A CN 109738671 A CN109738671 A CN 109738671A CN 201811492156 A CN201811492156 A CN 201811492156A CN 109738671 A CN109738671 A CN 109738671A
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- acceleration transducer
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Abstract
The invention belongs to acceleration transducer design fields, and in particular to a kind of acceleration transducer self-checking circuit.Common self-checking circuit uses relay switching circuit, influences the correctness of the output signal of acceleration transducer；In the self-test time, acceleration transducer is operated intermittently, and influences live signal output.Self-checking circuit of the invention includes computing circuit, self-test driving circuit and the self-test output circuit of serial connection, the differential output signal of the computing circuit acquisition acceleration transducer, and exports the deviation with reference voltage；The forward path of the self-test driving circuit or backward channel are connected according to the deviation or are not turned on；The self-test output circuit exports fault-signal in the case where forward path or negative sense access are connected.The interference signal disturbing acceleration signal generated when can prevent self-checking circuit from switching, influences the correctness of the output signal of acceleration transducer；The malfunction monitoring of on-line checking acceleration core may be implemented.
Description
Technical field
The invention belongs to acceleration transducer design fields, and in particular to a kind of acceleration transducer self-checking circuit.
Background technique
Acceleration transducer is a kind of acceleration signal to be converted to proportional voltage signal using acceleration sensitive core
A kind of sensor.For the quality for judging acceleration sensitive core, self-test is usually carried out to acceleration, traditional acceleration passes
When sensor self-test can only by judging the correctness of output voltage come self-test, cannot position acceleration core be out of order or
Signal processing circuit is out of order, thus cannot carry out On-line self-diagnosis to acceleration core.
Common self-checking circuit uses relay switching circuit, will test voltage input circuit to be checked, one side relay
Switching circuit can import interference signal, influence the correctness of the output signal of acceleration transducer；On the other hand in the self-test time
In, circuit cisco unity malfunction to be checked causes acceleration transducer to operate intermittently, and influences live signal output.
Summary of the invention
The purpose of the present invention is to propose to it is a kind of it is anti-interference, can on-line real-time measuremen, high reliablity acceleration transducer from
Examine circuit.
Acceleration transducer self-checking circuit of the invention, the self-checking circuit include the computing circuit of serial connection, self-test drive
Dynamic circuit and self-test output circuit, the differential output signal of the computing circuit acquisition acceleration transducer, and output and benchmark
The deviation of voltage；The forward path of the self-test driving circuit or backward channel are connected according to the deviation or do not lead
It is logical；The self-test output circuit exports fault-signal in the case where forward path or negative sense access are connected.
The computing circuit includes operational amplifier U1, and positive input passes through resistance R1, R2 respectively and acceleration passes
The differential output signal of sensor is in parallel, and reverse input end is connect by resistance R3 with reference voltage, and capacitor C1 is in parallel with resistance R4
It is connected between the reverse input end and output end of operational amplifier U1 afterwards.
The backward channel of the self-test driving circuit includes photoelectrical coupler N1A, and the first pin of input terminal connects signal ground
SGND, the second pin are connect by resistance R5 with the anode of switching diode V1, the cathode and operation amplifier of switching diode V1
The output end of device U1 connects, and the first pin of output end of photoelectrical coupler N1A connects 5V voltage, and the second pin is defeated after resistance R7
Out；The forward path includes photoelectrical coupler N1B, and the first pin of input terminal connect with the cathode of switching diode V2, opens
The anode for closing diode V2 is connect with the output end of operational amplifier U1, and the second pin is followed by signal ground SGND by resistance R6,
The first pin of output end of photoelectrical coupler N1B connects 5V voltage, and the second pin exports after resistance R9.
The self-test output circuit includes photoelectrical coupler N2A, the first pin of input terminal and the two of self-test driving circuit
The connection of road output end, the second pin meet signal ground SGND, and the first pin of output end connects 28V voltage, and the second pin passes through resistance R11
Output detection voltage afterwards, the detection voltage output end connect with capacitor C2, resistance R12 and adjustment diode D1 respectively and are followed by signal
Ground SGND, the adjustment diode D1 Opposite direction connection.
The second pin of output end of the photoelectrical coupler N1A also passes through resistance R8 and is followed by signal ground SGND；The photoelectricity
The second pin of coupler N1B also passes through resistance R10 and is followed by signal ground SGND.
The invention has the advantages that first: will be with the acceleration core output circuit and self-test detected using photoelectrical coupler
Circuit separates, the interference signal disturbing acceleration signal generated when on the one hand can prevent self-checking circuit from switching, influences acceleration biography
The correctness of the output signal of sensor；On the other hand in the self-test time, acceleration core output circuit and self-checking circuit are simultaneously
It works normally, does not interfere with each other, ensure that the real-time continuous output of acceleration signal.Second: the self-checking circuit passes through monitoring acceleration
The acceleration voltage signal of core and threshold voltage, the malfunction monitoring of on-line checking acceleration core may be implemented.
Detailed description of the invention
Fig. 1 is the schematic diagram of self-checking circuit of the present invention.
Specific embodiment
The present invention is described in further details below.With reference to Fig. 1, a kind of acceleration transducer self-checking circuit, including string
Computing circuit, self-test driving circuit and the self-test output circuit of connection, computing circuit by operational amplifier U1, resistance R1, R2, R3,
R4, capacitor C1 are constituted；Self-test driving circuit by photoelectrical coupler N1A, N1B, switching diode V1, V2, resistance R5, R6, R7,
R8, R9, R10 are constituted；Self-test output circuit is made of adjustment diode D1, N2A, resistance R11, R12, capacitor C2.
4 feet of operational amplifier U1 meet -15V, and 8 feet meet+15V, and 5 feet connect the right pin of R1 and the right pin of R2, and 6 feet meet R3
Right pin, the left pin of R4 and the left pin of C1,7 feet connect the right pin of the right pin of R4, C1；The left pin of resistance R1, which connects, to be added
The V- foot of speed core；The left pin of resistance R2 connects the V+ foot of acceleration core；The left pin of resistance R3 meets+5Vref.
The cathode of switching diode V1 and the anode of V2 are connect with 7 feet of operational amplifier U1 jointly；Photoelectrical coupler N1A
1 foot meet signal ground SGND, the right pin of 2 foot connecting resistance R5, resistance R5 is connect with the anode of switching diode V1, photoelectric coupling
The 8 foot connection+5V of device N1A, the upper pin of 7 foot connecting resistance R8 and the left pin of resistance R7, the right pin and photoelectricity coupling of resistance R7
1 foot of clutch N2A connects, and the lower pin of resistance R8 meets signal ground SGND.3 feet of photoelectrical coupler N1B connect switching diode
Cathode, the right pin of 4 foot connecting resistance R6, the left pin of resistance R6 connect signal ground SGND, the upper pin and electricity of 5 foot connecting resistance R10
The left pin of R9 is hindered, the right pin of resistance R9 is connect with 1 foot of photoelectrical coupler N2A, and the lower pin of R10 meets signal ground SGND,
6 feet of photoelectrical coupler N1B and 8 feet of photoelectrical coupler N1A meet+5V.
2 feet of photoelectrical coupler N2A meet signal ground SGND, the upper pin of 7 foot connecting resistance R11, and 8 feet meet+28V；Adjustment two
The positive and lower pin of resistance R12, the lower pin of capacitor C2 of pole pipe D1 is in parallel to meet signal ground SGND, and cathode is with resistance R12's
Upper pin, capacitor C2 upper pin parallel connection connecting resistance R11 lower pin.
Claims (5)
1. a kind of acceleration transducer self-checking circuit, it is characterised in that: the self-checking circuit include serial connection computing circuit, from
Examine driving circuit and self-test output circuit, the differential output signal of the computing circuit acquisition acceleration transducer, and export with
The deviation of reference voltage；The forward path of the self-test driving circuit or backward channel be connected according to the deviation or
It is not turned on；The self-test output circuit exports fault-signal in the case where forward path or negative sense access are connected.
2. acceleration transducer self-checking circuit according to claim 1, it is characterised in that: the computing circuit includes operation
Amplifier U1, it is in parallel with the differential output signal of acceleration transducer that positive input passes through resistance R1, R2 respectively, reversed defeated
Enter end to connect by resistance R3 with reference voltage, the reversed input of operational amplifier U1 is connected to after capacitor C1 is in parallel with resistance R4
Between end and output end.
3. acceleration transducer self-checking circuit according to claim 2, it is characterised in that: the self-test driving circuit it is anti-
It include photoelectrical coupler N1A to access, the first pin of input terminal meets signal ground SGND, and the second pin is by resistance R5 and switch
The anode connection of diode V1, the cathode of switching diode V1 are connect with the output end of operational amplifier U1, photoelectrical coupler N1A
The first pin of output end connect 5V voltage, the second pin exports after resistance R7；The forward path includes photoelectrical coupler
N1B, the first pin of input terminal are connect with the cathode of switching diode V2, anode and the operational amplifier U1 of switching diode V2
Output end connection, the second pin is followed by signal ground SGND by resistance R6, and the first pin of output end of photoelectrical coupler N1B connects
5V voltage, the second pin export after resistance R9.
4. acceleration transducer self-checking circuit according to claim 3, it is characterised in that: the self-test output circuit includes
Photoelectrical coupler N2A, the first pin of input terminal are connect with the two-way output end of self-test driving circuit, and the second pin connects signal ground
SGND, the first pin of output end connect 28V voltage, and the second pin exports detection voltage, the detection voltage output after resistance R11
End connect with capacitor C2, resistance R12 and adjustment diode D1 respectively and is followed by signal ground SGND, and the adjustment diode D1 reversely connects
It connects.
5. acceleration transducer self-checking circuit according to claim 2, it is characterised in that: the photoelectrical coupler N1A's
The second pin of output end also passes through resistance R8 and is followed by signal ground SGND；Second pin of photoelectrical coupler N1B also passes through resistance
R10 is followed by signal ground SGND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811492156.0A CN109738671B (en) | 2018-12-07 | 2018-12-07 | Acceleration sensor self-checking circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811492156.0A CN109738671B (en) | 2018-12-07 | 2018-12-07 | Acceleration sensor self-checking circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109738671A true CN109738671A (en) | 2019-05-10 |
| CN109738671B CN109738671B (en) | 2021-04-23 |
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ID=66358617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811492156.0A Active CN109738671B (en) | 2018-12-07 | 2018-12-07 | Acceleration sensor self-checking circuit |
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| Country | Link |
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| CN (1) | CN109738671B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077819A (en) * | 2019-12-06 | 2020-04-28 | 武汉航空仪表有限责任公司 | Frequency starting circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD267805A1 (en) * | 1987-12-08 | 1989-05-10 | Elektroprojekt Anlagenbau Veb | window |
| CN201852880U (en) * | 2010-09-03 | 2011-06-01 | 深圳创维数字技术股份有限公司 | Voltage detection and alarm module |
| CN102279335A (en) * | 2010-06-11 | 2011-12-14 | 山特电子（深圳）有限公司 | Device and method for online detection on short troubles of thyristor |
| CN203376387U (en) * | 2013-06-19 | 2014-01-01 | 山东朗进科技股份有限公司 | Over-voltage detection circuit and PFC circuit using the same |
| CN107085124A (en) * | 2017-04-25 | 2017-08-22 | 湘潭大学 | A kind of fully differential dynamic balance pattern MEMS acceleration transducer signals process circuits |
| CN207601191U (en) * | 2017-12-13 | 2018-07-10 | 广东电网有限责任公司肇庆供电局 | A kind of relay protection outlet pulse-detecting circuit |
-
2018
- 2018-12-07 CN CN201811492156.0A patent/CN109738671B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD267805A1 (en) * | 1987-12-08 | 1989-05-10 | Elektroprojekt Anlagenbau Veb | window |
| CN102279335A (en) * | 2010-06-11 | 2011-12-14 | 山特电子（深圳）有限公司 | Device and method for online detection on short troubles of thyristor |
| CN201852880U (en) * | 2010-09-03 | 2011-06-01 | 深圳创维数字技术股份有限公司 | Voltage detection and alarm module |
| CN203376387U (en) * | 2013-06-19 | 2014-01-01 | 山东朗进科技股份有限公司 | Over-voltage detection circuit and PFC circuit using the same |
| CN107085124A (en) * | 2017-04-25 | 2017-08-22 | 湘潭大学 | A kind of fully differential dynamic balance pattern MEMS acceleration transducer signals process circuits |
| CN207601191U (en) * | 2017-12-13 | 2018-07-10 | 广东电网有限责任公司肇庆供电局 | A kind of relay protection outlet pulse-detecting circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077819A (en) * | 2019-12-06 | 2020-04-28 | 武汉航空仪表有限责任公司 | Frequency starting circuit |
| CN111077819B (en) * | 2019-12-06 | 2021-06-01 | 武汉航空仪表有限责任公司 | Frequency starting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109738671B (en) | 2021-04-23 |
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