CN201072358Y - Intelligent sensor for diagnosis - Google Patents
Intelligent sensor for diagnosis Download PDFInfo
- Publication number
- CN201072358Y CN201072358Y CNU2007201251375U CN200720125137U CN201072358Y CN 201072358 Y CN201072358 Y CN 201072358Y CN U2007201251375 U CNU2007201251375 U CN U2007201251375U CN 200720125137 U CN200720125137 U CN 200720125137U CN 201072358 Y CN201072358 Y CN 201072358Y
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Abstract
The utility model discloses an intelligent transducer used for diagnosis and comprises an electrical transducer, a processing circuit and a micro controller circuit. The utility model is characterized in that an analog output and digital conversion control circuit is arranged between an output end of the processing circuit and an analog quantity input end of the micro controller circuit, the communication interface output end of the micro controller circuit is connected with a driving circuit of the communication interface; the signal between the micro controller circuit and the communication interface driving circuit is transmitted in two ways and when analog signal is needed to be output from the intelligent transducer, the analog signal is output through the analog output and digital conversion control circuit and when digital signal is needed to be output from the intelligent transducer, the analog signal is input to the micro controller circuit through the analog output and digital conversion control circuit and changed into the digital signal to be output in the micro controller circuit. The utility model has intelligent function of filtrating waves according to requirements and outputting the needed signals.
Description
Technical field
The utility model relates to intelligence sensor, is specifically related to have simultaneously the diagnosis intelligence sensor of simulating signal output and digital signal output.
Background technology
In Industry Control and monitoring system, sensor application is more and more, existing piezoelectric sensor is because the internal impedance of piezoelectric sensitivity device itself is very high, make piezoelectric device be difficult to directly use general amplifier, and must carry out preposition impedance conversion, simultaneously because the burr that bearing processing is produced, certain high frequency interference that sensor is installed and factor such as environmental interference will superpose on sensor output signal, and original signal is through transmission, amplify, processing procedures such as conversion, also can sneak into various multi-form noises, thereby can influence measuring accuracy, simultaneously, existing sensor output signal is single, normally, bring inconvenience to commercial Application only with analog quantity output or only with digital quantity output.
The utility model content
Technical problem to be solved in the utility model is to provide that a kind of circuit is simple, precision is high, has the diagnosis intelligence sensor of simulating signal output and digital signal output simultaneously.
In order to solve the problems of the technologies described above, a technical scheme of the present utility model is, a kind of diagnosis intelligence sensor is provided, and comprises piezoelectric sensor, treatment circuit, microcontroller circuit, wherein,
Piezoelectric sensor: convert vibration signal to charge signal and be input to treatment circuit;
Treatment circuit: receive the charge signal of piezoelectric sensor output, charge signal is handled back output;
Between the analog quantity input end of the output terminal of treatment circuit and microcontroller circuit, be connected simulation output and digital conversion control circuit, and the communication interface output terminal of microcontroller circuit is connected to the communication interface driving circuit, signal between microcontroller circuit and the communication interface driving circuit is a transmitted in both directions, when intelligence sensor need be exported simulating signal, simulating signal is by simulation output and the output of digital conversion control circuit, when intelligence sensor need be exported digital signal, simulating signal is imported microcontroller circuit by simulation output and digital conversion control circuit, finishes by microcontroller circuit analog signal conversion is become digital signal output.
According to a preferred version of the present utility model, described treatment circuit is made up of charge amplifier, filtering circuit, normalization amplifier, described charge amplifier receives the charge signal of piezoelectric sensor output, output to filtering circuit after converting charge signal to voltage signal, described filtering circuit carries out every direct sum filtering voltage signal, output to the normalization amplifier, microcontroller circuit is exported or be input to described normalization amplifier with simulating signal by simulation output and digital conversion control circuit.
A preferred version of the present utility model, described charge amplifier is by capacitor C
1, C
2And resistance R
1, R
2, amplifier A
1Form, the charge signal of described piezoelectric sensor output passes through capacitor C
2And resistance R
2Be added to amplifier A
1Anti-phase amplification end, feedback capacity C
1Be connected amplifier A
1Output terminal and the output terminal of piezoelectric sensor between, resistance R
1Be connected amplifier A
1Output terminal and inverting input between, amplifier A simultaneously
1In-phase input end ground connection.
According to a preferred version of the present utility model, described filtering circuit is the filter circuit that adopts single operational amplifier to constitute, and circuit is the circuit of positive feedback.
According to a preferred version of the present utility model, described simulation output and digital conversion control circuit are by relay K M
1, KM
2, stop button SB
1, A/D conversion and control button SB
2, simulation output button SB
3Form, wherein relay K M
2Normally opened contact be connected the output terminal of normalization amplifier, relay K M
1Normally opened contact be connected between the input end of the output terminal of normalization amplifier and microcontroller circuit; A/D conversion and control button SB
2Normally opened contact and relay K M
1Normally opened contact be connected in parallel the back with relay K M
1Coil, relay K M
2Normally closed contact, simulation output button SB
3Normally closed contact, stop button SB
1Normally closed contact be connected in series, simultaneously, simulation output button SB
3Normally opened contact and relay K M
2Normally opened contact be connected in parallel the back with relay K M
2Coil, relay K M
1Normally closed contact, A/D conversion and control button SB
2Normally closed contact, stop button SB
1Normally closed contact be connected in series stop button SB
1An end of normally closed contact connect power supply, relay K M
1Coil and relay K M
2An end ground connection of coil.
Described microcontroller circuit has storer and A/D control module.
Diagnosis described in the utility model with the beneficial effect of intelligence sensor is, obtain temperature by sensor, pressure, flow, rotating speed, displacement, speed, acceleration, signals such as acoustic emission signal, and vibration signal amplified, filtering, conversion, computing, two kinds of output forms of analog quantity and digital quantity are arranged, intelligent functions with filtering on request and output desired signal, can make data acquisition link Highgrade integration, improved the strong noise environment authenticity of extraction Weak fault signal down, reduce the possibility of data acquisition link faults itself, dwindle the volume of fault diagnosis front end significantly, can realize the intelligent multipoint parallel monitoring neatly.
Description of drawings
Fig. 1 is the theory diagram of diagnosis described in the utility model with intelligence sensor.
Fig. 2 is the circuit diagram of diagnosis described in the utility model with intelligence sensor.
Fig. 3 is the main program flow block diagram of the single-chip microcomputer of packing into described in the utility model.
Fig. 4 is the interrupt routine FB(flow block) of the single-chip microcomputer of packing into described in the utility model.
Embodiment
Referring to Fig. 1, diagnosis described in the utility model is made up of with digital conversion control circuit 6, communication interface driving circuit 7 piezoelectric sensor 1, charge amplifier 2, filtering circuit 3, normalization amplifier 4, treatment circuit 8, microcontroller circuit 5, simulation output with intelligence sensor, and wherein said charge amplifier 2, filtering circuit 3, normalization amplifier 4 are formed treatment circuit 8; The output terminal of piezoelectric sensor 1 is connected to the input end of charge amplifier 2, the output terminal of charge amplifier 2 connects the input end of filtering circuit 3, the output terminal of filtering circuit 3 connects the input end of normalization amplifier 4, the output terminal of normalization amplifier 4 connects simulation output and digital conversion control circuit 6, simulation output is connected the analog quantity input end of microcontroller circuit 5 with an output terminal of digital conversion control circuit 6, the serial communication interface output terminal of microcontroller circuit 5 connects communication interface driving circuit 7, wherein, piezoelectric sensor 1 converts vibration signal to charge signal and is input to charge amplifier 2, described charge amplifier 2 receives the charge signal of piezoelectric sensor 1 output, output to filtering circuit 3 after the Charge Source of high internal resistance being converted to the voltage source of low internal resistance, 3 pairs of voltage signals of described filtering circuit carry out every direct sum filtering, output to normalization amplifier 4, after normalized is carried out in the requirement of the simulating signal peace measurement range that described normalization amplifier 4 is later with filtering, the simulating signal of its output can be input to microcontroller circuit 5 with 6 outputs of digital conversion control circuit or by simulation output with digital conversion control circuit 6 by simulation output, and microcontroller circuit 5 is realized the UART serial communication by communication interface driving circuit 7.
Referring to Fig. 2, diagnosis intelligence sensor described in the utility model, described charge amplifier 2 is by capacitor C
1, C
2And resistance R
1, R
2, amplifier A
1Form, the charge signal of described piezoelectric sensor 1 output passes through capacitor C
2And resistance R
2Be added to amplifier A
1Anti-phase amplification end, feedback capacity C
1Be connected amplifier A
1Output terminal and the output terminal of piezoelectric sensor 1 between, resistance R
1Be connected amplifier A
1Output terminal and inverting input between, amplifier A simultaneously
1In-phase input end ground connection.
The filter circuit that described filtering circuit 3 adopts single operational amplifier to constitute, circuit adopts the method for designing of positive feedback, the effect with isolated DC component and low-pass filtering.Filtering circuit 3 is by amplifier A in the present embodiment
2, capacitor C
3, C
4, C
5, resistance R
3, R
4, R
5Form, wherein the input end of filtering circuit 3 links to each other with the output terminal of charge amplifier 2, and the input end of filtering circuit 3 passes through by capacitor C
3And resistance R
5The block isolating circuit of forming passes through resistance R then
3, resistance R
4Be added to amplifier A
2Homophase amplify end, amplifier A simultaneously
2Homophase amplify end and capacitor C
5An end be connected capacitor C
5The direct ground connection of the other end, feedback capacity C
4An end be connected amplifier A
2Output terminal, the other end is connected resistance R
3And resistance R
4Connected node on, amplifier A
2Anti-phase amplification end link to each other with its output terminal.
Described normalization amplifier 4 is by amplifier A
3, resistance R
6, R
7, R
8, potentiometer W
1Form, wherein, the normalization amplifier input terminal links to each other with the output terminal of its signal filter circuit, and voltage signal is adjusted potentiometer W through input circuit
1And resistance R
6Be added to amplifier A
3Anti-phase amplification end, and amplifier A
3Homophase amplify end by compensating resistance R
7Ground connection, feedback resistance R
8Be connected amplifier A
3Output terminal and inverting input between.
Comprise single-chip microcomputer IC1 and reseting circuit chip IC 3 in the described microcontroller circuit 5, wherein the model of single-chip microcomputer IC1 employing can be selected AD μ C812 for use, reseting circuit chip IC 3 can adopt ADM810, system communication can be used the RS-485 bus, also can adopt RS-232 to realize the UART serial communication.
Described communication interface driving circuit 7 mainly is made up of communication interface chip for driving IC2, utilizes communication interface driving circuit 7 realizing the UART serial communication, and obtains communication distance far away and noiseproof feature preferably, and chip for driving IC2 can adopt 7MAX485.
When system came into operation, to the relevant timer of single-chip microcomputer IC1, register and interruption etc. carried out initialization earlier, judge then whether single-chip microcomputer IC1 port ADC0 is high level, if high level has then illustrated the signal input, then carry out the collection of data, low level then continues to judge to be waited for; After data begin to gather, whether the TF0 position of judging timer T0 simultaneously is 1, when being the acquisition time that 1 explanation arrives setting, stop to gather, be that maximal value after the voltage signal conversion compares with the data that collect with leaving vibratory output limit value among the single-chip microcomputer IC1 in again, light the LED lamp if the data that collect surpass the vibratory output limit value and report to the police, utilize timer T1 to produce simultaneously and interrupt; If the data that collect do not surpass the vibratory output limit value then data storage is arrived the external data storage district, then carry out next time again and gather.
The workflow of interrupt service routine is: have no progeny in the generation, the timeing closing device interrupts, and the data that surpass the vibratory output limit value are transmitted, and opens interruption then, interrupts returning.
Diagnosis described in the utility model with the principle of work of intelligence sensor is: the Charge Source of the high internal resistance of piezoelectric sensor 1 output converts the voltage source of low internal resistance to through charge amplifier 2, to realize impedance matching, and the output voltage of charge amplifier 2 is directly proportional with the input electric charge, the voltage signal of output is wave circuit 3 after filtration again, the processing of normalization amplifier 4, realize the simulation of signal is exported by simulation output and digital conversion control circuit 6, and by linking to each other with microcontroller circuit 5, finish the automatic control to the Analog signals'digital conversion, microcontroller circuit 5 is realized the UART serial communication by communication interface driving circuit 7 simultaneously.
In simulation output and digital conversion control circuit 6, press A/D conversion and control button SB
2, relay K M
1Coil " get ", its normally opened contact closure makes signal import AD μ C812 chip into, carries out A/D conversion.Press stop button SB
1, relay K M
1Coil " dead electricity ", the transmission of signal is interrupted.When pressing signal imitation output button SB
3The time, relay K M
2Coil " get ", its normally opened contact closure, signal no longer imports AD μ C812 chip into and directly exports with emulation mode.With relay K M
1And KM
2Normally closed contact connect with the other side's coil respectively, can guarantee relay K M
1And KM
2Coil not simultaneously " getting ", this safety practice is called as " interlocking " in relay circuit.In addition, operation also is provided with " button interlocking " for convenience, is about to relay K M
1Coil and signal imitation output button SB
3Normally closed contact series connection, with relay K M
2Coil and A/D conversion and control button SB
2Normally closed contact series connection.When signal is in the process of A/D conversion, if want to convert to the simulating signal output state, can be not according to stop button SB
1Export button SB and directly press simulation
3, relay K M
2Coil " get " simulation output button SB simultaneously
3Normally closed contact disconnect relay K M
1Coil " dead electricity ", enter the simulating signal output state.Signal from analog signal output state can pass through A/D conversion and control button SB to the conversion of A/D transition status
2Directly finish.
Claims (6)
1. a diagnosis intelligence sensor comprises piezoelectric sensor (1), treatment circuit (8), microcontroller circuit (5), wherein:
Piezoelectric sensor (1): convert vibration signal to charge signal and be input to treatment circuit (8);
Treatment circuit (8): receive the charge signal of piezoelectric sensor (1) output, charge signal is handled back output;
It is characterized in that: between the analog quantity input end of the output terminal of treatment circuit (8) and microcontroller circuit (5), be connected simulation output and digital conversion control circuit (6), and the communication interface output terminal of microcontroller circuit (5) is connected to communication interface driving circuit (7), signal between microcontroller circuit (5) and the communication interface driving circuit (7) is a transmitted in both directions, when intelligence sensor need be exported simulating signal, simulating signal is by simulation output and digital conversion control circuit (6) output, when intelligence sensor need be exported digital signal, simulating signal is imported microcontroller circuit (5) by simulation output and digital conversion control circuit (6), finishes by microcontroller circuit (5) analog signal conversion is become digital signal output.
2. diagnosis intelligence sensor according to claim 1, it is characterized in that: described treatment circuit (8) is made up of charge amplifier (2), filtering circuit (3), normalization amplifier (4), the output charge signal that is input as piezoelectric sensor (1) of described charge amplifier (2), charge amplifier (2) output to filtering circuit (3) after converting charge signal to voltage signal; Filtering circuit (3) carries out every direct sum filtering voltage signal, outputs to normalization amplifier (4); Described normalization amplifier (4) will carry out normalization by the requirement of measurement range every the filtered signal of direct sum and amplify, and microcontroller circuit (5) is exported or be input to the simulating signal of its output by simulation output with digital conversion control circuit (6).
3. diagnosis intelligence sensor according to claim 2 is characterized in that: described charge amplifier (2) is by capacitor C
1, C
2And resistance R
1, R
2, amplifier A
1Form, the charge signal of described piezoelectric sensor (1) output passes through capacitor C
2And resistance R
2Be added to amplifier A
1Anti-phase amplification end, feedback capacity C
1Be connected amplifier A
1Output terminal and the output terminal of piezoelectric sensor (1) between, resistance R
1Be connected amplifier A
1Output terminal and inverting input between, amplifier A simultaneously
1In-phase input end ground connection.
4. diagnosis intelligence sensor according to claim 3 is characterized in that: filtering circuit adopts single operational amplifier to constitute, and circuit is the active second-order low-pass filter circuit with isolated DC effect.
5. according to claim 1 or 2 or 3 or 4 described diagnosis intelligence sensors, it is characterized in that: simulation output and digital conversion control circuit (6) are by relay K M
1, KM
2, stop button SB
1, A/D conversion and control button SB
2, simulation output button SB
3Form, wherein relay K M
2Normally opened contact be connected the output terminal of normalization amplifier (4), relay K M
1Normally opened contact be connected between the input end of the output terminal of normalization amplifier (4) and microcontroller circuit (5); A/D conversion and control button SB
2Normally opened contact and relay K M
1Normally opened contact be connected in parallel the back with relay K M
1Coil, relay K M
2Normally closed contact, simulation output button SB
3Normally closed contact, stop button SB
1Normally closed contact be connected in series, simultaneously, simulation output button SB
3Normally opened contact and relay K M
2Normally opened contact be connected in parallel the back with relay K M
2Coil, relay K M
1Normally closed contact, A/D conversion and control button SB
2Normally closed contact, stop button SB
1Normally closed contact be connected in series stop button SB
1An end of normally closed contact connect power supply, relay K M
1Coil and relay K M
2An end ground connection of coil.
6. diagnosis intelligence sensor according to claim 5 is characterized in that: described microcontroller circuit (5) is the control module with storage and A/D conversion and serial communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201251375U CN201072358Y (en) | 2007-09-05 | 2007-09-05 | Intelligent sensor for diagnosis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201251375U CN201072358Y (en) | 2007-09-05 | 2007-09-05 | Intelligent sensor for diagnosis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072358Y true CN201072358Y (en) | 2008-06-11 |
Family
ID=39550916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201251375U Expired - Fee Related CN201072358Y (en) | 2007-09-05 | 2007-09-05 | Intelligent sensor for diagnosis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201072358Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571710A (en) * | 2015-12-11 | 2016-05-11 | 中国航空工业集团公司西安航空计算技术研究所 | Acquisition circuit of airborne vibration signals of engine |
| CZ306889B6 (en) * | 2011-08-26 | 2017-08-30 | Viditech Spol. S R. O. | A method of securing machines against vibrations and a device for implementing this method |
| CN110221561A (en) * | 2019-06-14 | 2019-09-10 | 国网新疆电力有限公司电力科学研究院 | A kind of power grid acoustic array wireless sensor based on MEMS technology |
| CN113008275A (en) * | 2021-03-01 | 2021-06-22 | 上海木西电子科技有限公司 | Capacitive analog quantity signal output sensor |
| CN116046147A (en) * | 2023-02-22 | 2023-05-02 | 浙江省计量科学研究院 | Intelligent noise sensor |
-
2007
- 2007-09-05 CN CNU2007201251375U patent/CN201072358Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ306889B6 (en) * | 2011-08-26 | 2017-08-30 | Viditech Spol. S R. O. | A method of securing machines against vibrations and a device for implementing this method |
| CN105571710A (en) * | 2015-12-11 | 2016-05-11 | 中国航空工业集团公司西安航空计算技术研究所 | Acquisition circuit of airborne vibration signals of engine |
| CN110221561A (en) * | 2019-06-14 | 2019-09-10 | 国网新疆电力有限公司电力科学研究院 | A kind of power grid acoustic array wireless sensor based on MEMS technology |
| CN113008275A (en) * | 2021-03-01 | 2021-06-22 | 上海木西电子科技有限公司 | Capacitive analog quantity signal output sensor |
| CN116046147A (en) * | 2023-02-22 | 2023-05-02 | 浙江省计量科学研究院 | Intelligent noise sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080611 Termination date: 20160905 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |