CN209102205U - Axis vibration sensor protects circuit - Google Patents
Axis vibration sensor protects circuit Download PDFInfo
- Publication number
- CN209102205U CN209102205U CN201821852417.0U CN201821852417U CN209102205U CN 209102205 U CN209102205 U CN 209102205U CN 201821852417 U CN201821852417 U CN 201821852417U CN 209102205 U CN209102205 U CN 209102205U
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- triode
- operational amplifier
- voltage signal
- voltage
- circuit
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Abstract
A kind of axis vibration sensor of the utility model protects circuit, and the circuit includes: voltage follower circuit, the voltage detection signal SI that vibration voltage signal SIG enhances through voltage follower output loading driving capability；Benchmark comparison circuit, for being compared to vibration voltage signal SIG and reference voltage signal VCC and exporting comparison voltage signal SV；Operational amplifier, the output end VOUT of operational amplifier exports measured signal, the positive input of voltage detection signal SI input operational amplifier, the output end of the operational amplifier is connected to its reverse input end, the base stage of triode Q1 and triode Q2, the emitter difference resistance grounded of triode Q1 and triode Q2 are inputted after comparison voltage signal SV sub-resistance partial pressure respectively；Output end of the collector of triode Q1 through resistance access operational amplifier, the positive input of the collector access amplifier of triode Q2.A kind of axis vibration sensor of the utility model protects circuit, can effectively be protected to axis vibration sensor and monitor its state.
Description
Technical field
The utility model relates to a kind of protection circuit, more particularly, to a kind of for being protected to axis vibration sensor
Circuit.
Background technique
Axis vibration sensor is a kind of non-contact measurement sensor, it be by sensor end and testee it
Between distance change measure the vibration displacement or amplitude of object: when the distance between tested metal and probe change
When, the signal processing circuit on coil and circuit board in sensor probe forms LCR oscillating circuit, to generate oscillation electricity
Pressure, and this is converted to voltage (electricity by detection, filtering, linear compensation, amplification normalization with the oscillating voltage of distance change
Stream) variation, it is finally completed mechanical displacement (gap) and is converted into industrial voltage (electric current).
Currently, the axis vibration sensor of domestic market is in industry spot use process, sensor probe it is possible that
Measured object is loosened or deviates, at this point, the gap voltage of axis vibration sensor output is higher, close to power supply voltage, electric current
It also can be therewith close to saturation.If wiring board inside chip and component element long period are in hard service, shaft vibration can be caused
The damage of leading sensor device part.
Summary of the invention
Purpose of the utility model is to overcome the above-mentioned shortcomings and provide a kind of axis vibration sensors to protect circuit, can
Effectively axis vibration sensor is protected and monitors its state.
Purpose of the utility model is realized as follows:
A kind of axis vibration sensor protection circuit, the circuit includes:
Voltage follower circuit, plays the role of impedance matching, and vibration voltage signal SIG drives through voltage follower output loading
The voltage detection signal SI of ability enhancing；
Benchmark comparison circuit compares for vibration voltage signal SIG and reference voltage signal VCC to be compared and exported
Voltage signal SV；
Operational amplifier, the output end VOUT of operational amplifier export measured signal, and voltage detection signal SI inputs operation
The positive input of amplifier, the output end of the operational amplifier are connected to its reverse input end, and comparison voltage signal SV divides
Input the base stage of triode Q1 and triode Q2 after electric resistance partial pressure respectively, the emitter of triode Q1 and triode Q2 are respectively through electricity
Resistance ground connection；Output end of the collector of triode Q1 through resistance access operational amplifier, the collector of triode Q2 access amplification
The positive input of device.
A kind of axis vibration sensor of the utility model protects circuit, and vibration voltage signal SIG is after the filtering of RC filter circuit
Following by inputting voltages circuit.
A kind of axis vibration sensor of the utility model protects circuit, and the benchmark comparison circuit includes operational amplifier
U2A, based on the inverting input terminal of voltage signal VCC input operational amplifier U2A, the reverse phase of operational amplifier U2A is through electricity respectively
Resistance and capacity earth, vibration voltage signal SIG are connected to the non-inverting input terminal of operational amplifier U2A through resistance, and the operation is put
The input terminal of big device U2A exports comparison voltage signal SV through voltage-stabiliser tube and resistance, and comparison voltage signal SV is through respectively through capacitor
It is grounded with another voltage-stabiliser tube.
A kind of axis vibration sensor of the utility model protects circuit, and comparison voltage signal SV is respectively via two groups of concatenated electricity
The base stage of the voltage after dividing to triode Q1 and triode Q2 is exported after resistance bleeder circuit.
Compared with prior art, the utility model has the beneficial effects that
After the utility model circuit: when vibration voltage signal SIG (gap voltage) output exports just in sensor
When in the normal range of linearity, sensor is normally exported；When gap voltage output is beyond Sensor output linearity region, sensor is defeated
It is zeroed out, so that it is guaranteed that the stabilization of sensor performance, meanwhile, user judges sensor according to this characteristic scene of can also carrying out
Whether performance is normal, avoids secondary detachable maintaining.
Detailed description of the invention
Fig. 1 is the circuit diagram that a kind of axis vibration sensor of the utility model protects circuit.
Specific embodiment
Referring to Fig. 1, the utility model relates to a kind of axis vibration sensor protect circuit, the circuit includes:
Voltage follower circuit, plays the role of impedance matching, and vibration voltage signal SIG drives through voltage follower output loading
The voltage detection signal SI of ability enhancing；
Benchmark comparison circuit compares for vibration voltage signal SIG and reference voltage signal VCC to be compared and exported
Voltage signal SV；
Operational amplifier, the output end VOUT of operational amplifier export measured signal, and voltage detection signal SI inputs operation
The positive input of amplifier, the output end of the operational amplifier are connected to its reverse input end, and comparison voltage signal SV divides
Input the base stage of triode Q1 and triode Q2 after electric resistance partial pressure respectively, the emitter of triode Q1 and triode Q2 are respectively through electricity
Resistance ground connection；Output end of the collector of triode Q1 through resistance access operational amplifier, the collector of triode Q2 access amplification
The positive input of device；
The principles of the present invention are that will set reference voltage signal VCC, when benchmark comparison circuit detects vibration electricity
When signal SIG being pressed to be greater than the load voltage value of reference voltage signal VCC, triode Q1 and triode Q2 conducting, thus by operation
It is 0 that the output end VOUT output measured signal of amplifier, which is drawn, at this time subsequent vibrating sensor circuit, that is, knowable front end sensors
Deviate actually detected position, and effectively prevents excessive voltage from damaging back-end circuit；When vibration voltage signal SIG is less than in advance
If load voltage value when, triode Q1 and triode Q2 stop working, the output end VOUT of operational amplifier normally export to
Survey signal；
Concretely:
Vibration voltage signal SIG following by inputting voltages circuit after the filtering of RC filter circuit；
Benchmark comparison circuit includes operational amplifier U2A, based on the anti-of voltage signal VCC input operational amplifier U2A
The reverse phase of phase input terminal, operational amplifier U2A is connected to through resistance and capacity earth, vibration voltage signal SIG respectively through resistance
The input terminal of the non-inverting input terminal of operational amplifier U2A, the operational amplifier U2A exports comparison voltage through voltage-stabiliser tube and resistance
Signal SV, and comparison voltage signal SV is grounded through capacitor and another voltage-stabiliser tube respectively；
Comparison voltage signal SV is respectively via the voltage after output partial pressure after two groups of concatenated resistor voltage divider circuits to three poles
The base stage of pipe Q1 and triode Q2；
In addition: it should be noted that above-mentioned specific embodiment is only a prioritization scheme of this patent, the skill of this field
Any change or improvement that art personnel are done according to above-mentioned design, within the protection domain of this patent..
Claims (4)
1. a kind of axis vibration sensor protects circuit, it is characterised in that: the circuit includes:
Voltage follower circuit, plays the role of impedance matching, and vibration voltage signal SIG is by voltage follower output loading driving capability
The voltage detection signal SI of enhancing；
Benchmark comparison circuit, for being compared to vibration voltage signal SIG and reference voltage signal VCC and exporting comparison voltage
Signal SV；
Operational amplifier, the output end VOUT of operational amplifier export measured signal, and voltage detection signal SI inputs operation amplifier
The positive input of device, the output end of the operational amplifier are connected to its reverse input end, comparison voltage signal SV sub-resistance
Input the base stage of triode Q1 and triode Q2 after partial pressure respectively, the emitter of triode Q1 and triode Q2 connect through resistance respectively
Ground；Output end of the collector of triode Q1 through resistance access operational amplifier, the collector access amplifier of triode Q2
Positive input.
2. a kind of axis vibration sensor protects circuit as described in claim 1, it is characterised in that: vibration voltage signal SIG is through RC
Following by inputting voltages circuit after filter circuit filtering.
3. a kind of axis vibration sensor protects circuit as described in claim 1, it is characterised in that: the benchmark comparison circuit includes
There is operational amplifier U2A, based on the inverting input terminal of voltage signal VCC input operational amplifier U2A, operational amplifier U2A's
Reverse phase is connected to the homophase input of operational amplifier U2A through resistance through resistance and capacity earth, vibration voltage signal SIG respectively
The input terminal at end, the operational amplifier U2A exports comparison voltage signal SV, and comparison voltage signal SV through voltage-stabiliser tube and resistance
It is grounded respectively through capacitor and another voltage-stabiliser tube.
4. a kind of axis vibration sensor protects circuit as described in claim 1, it is characterised in that: comparison voltage signal SV is passed through respectively
By the base stage for exporting the voltage after dividing to triode Q1 and triode Q2 after two groups of concatenated resistor voltage divider circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821852417.0U CN209102205U (en) | 2018-11-09 | 2018-11-09 | Axis vibration sensor protects circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821852417.0U CN209102205U (en) | 2018-11-09 | 2018-11-09 | Axis vibration sensor protects circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209102205U true CN209102205U (en) | 2019-07-12 |
Family
ID=67159061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821852417.0U Active CN209102205U (en) | 2018-11-09 | 2018-11-09 | Axis vibration sensor protects circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209102205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156341A (en) * | 2021-03-11 | 2021-07-23 | 南京高速齿轮制造有限公司 | Detection circuit and device for vibration sensor of gear box |
-
2018
- 2018-11-09 CN CN201821852417.0U patent/CN209102205U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156341A (en) * | 2021-03-11 | 2021-07-23 | 南京高速齿轮制造有限公司 | Detection circuit and device for vibration sensor of gear box |
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