CN208313847U - A kind of detector circuit for piston cleanliness detection - Google Patents
A kind of detector circuit for piston cleanliness detection Download PDFInfo
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- CN208313847U CN208313847U CN201820888598.6U CN201820888598U CN208313847U CN 208313847 U CN208313847 U CN 208313847U CN 201820888598 U CN201820888598 U CN 201820888598U CN 208313847 U CN208313847 U CN 208313847U
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Abstract
A kind of detector circuit for piston cleanliness detection, photoelectric converter including measured optical signal to be converted into current signal, the current signal that photoelectric converter generates is converted into the current-voltage conversion module of voltage signal, the voltage signal filter module of noise reduction process is carried out to the voltage signal after conversion, filtered voltage signal is subjected to the voltage signal pressure stabilizing amplification module of pressure stabilizing amplification and inhibits temperature change to the temperature compensation module of output signal generation drift effect, the photoelectric converter is connect with the input terminal of current-voltage conversion module, the utility model provides a kind of detector circuit for piston cleanliness detection, the drift for inhibiting temperature change and leading to detection circuit output signal is played while detection, reach detection simply and easily purpose.
Description
Technical field
The utility model relates to fields of measurement, and in particular to a kind of detector circuit for piston cleanliness detection.
Background technique
Piston will carry out cleannes detection to it after finalization of the manufacture, and common contaminant has grease, dust, fingerprint etc., existing
Have and be generally non-contact detection in technology, it mainly detects optical signalling using electronic technology, photoelectric detecting technology
Non electrical quantity information to be detected is transformed into the optical information convenient for receiving by optical system, then utilizes photodetector
Optical information is become electricity by part, and further across circuit enhanced processing, is achieved the purpose that with electric signal output.
Current light intensity electro-detection implementation has two major classes: one kind is generated using after photodiode detection optical signal
Electric current detects light intensity by electric current manner of comparison；Another kind of is to generate electric current using after photodiode detection optical signal, is led to
Overcurrent flows through resistance and is converted to the mode of voltage to detect light intensity.
But for faint optical signal, the signal of photodiode output is easy to be embedded in noise, directlys adopt electric current
The method detection light intensity compared is relatively difficult, and the method for using detectable voltage signals can make detection more easy, however to make
The voltage signal that light intensity detection circuit generates can be by subsequent processing, it is necessary to which light intensity detection circuit can make voltage signal have conjunction
Suitable output amplitude, in addition, the output of photoelectric detective circuit can be made after photodiode and electronic component are influenced by temperature
Signal generates the phenomenon that drift.
Summary of the invention
To solve the above problems, the utility model provides a kind of detector circuit for piston cleanliness detection, detection
While play and inhibit temperature change and lead to the drift of detection circuit output signal, reach detection simply and easily purpose.
The technical scheme adopted by the utility model is a kind of detector circuit for piston cleanliness detection, including
Measured optical signal is converted into the photoelectric converter of current signal, the current signal that photoelectric converter generates is converted into voltage
The current-voltage conversion module of signal, will be filtered the voltage signal filter module that noise reduction process is carried out to the voltage signal after conversion
Voltage signal after wave carries out the voltage signal pressure stabilizing amplification module of pressure stabilizing amplification and temperature change is inhibited to generate output signal
The temperature compensation module of drift effect, the photoelectric converter are connect with the input terminal of current-voltage conversion module, the electricity
Stream-voltage signal conversion module output end is connect with the input terminal of voltage signal filter module, and the voltage signal filters mould
Block is connect with the input terminal of voltage signal pressure stabilizing amplification module, the voltage signal pressure stabilizing amplification module and temperature compensation module
Input terminal connection.
As the further preferred of the utility model, the electrooptical device is silicon photoelectric diode, is located in circuit
In reverse-biased operating mode.
As the further preferred of the utility model, the current-voltage conversion module includes resistance R1-R2, capacitor C1-
C2, operational amplifier U1, the resistance R1 are connected in parallel between the reverse side and output end of operational amplifier U1, and the capacitor C1 is simultaneously
The both ends of resistance R1 are associated in, the in-phase end of the operational amplifier is grounded by resistance R2, and the capacitor C2 is connected in parallel on resistance R2
On, the cathode of the silicon photoelectric diode connects the reverse side of operational amplifier, the output termination voltage letter of the operational amplifier
The input terminal of number filter module.
As the further preferred of the utility model, the voltage signal filter module includes resistance R3-R4, capacitor C3-
The output end of one termination operational amplifier U1 of the circuit after C4, the resistance R3 and resistance R4 series connection, another termination voltage letter
The input terminal of number pressure stabilizing amplifying circuit, on the circuit between terminating resistor a R3 and R4 of the capacitor C3, other end ground connection, institute
State the output end of a terminating resistor R4 of capacitor C4, other end ground connection.
As the further preferred of the utility model, the voltage signal pressure stabilizing amplification module include zener diode D2,
Resistance R5-R8, operational amplifier U2, triode Q1, the resistance R7 are variable resistance, a terminating resistor of the resistance R5
R4, the in-phase end of another termination operational amplifier U2, the cathode of the zener diode D2 connect the in-phase end of operational amplifier U2,
Other end ground connection, one end of a terminating resistor R6 of the resistance R7, the other end ground connection of resistance R6, another termination of resistance R7
One end of resistance R8, the reverse side of the variable resistance termination operational amplifier U2 of the resistance R7, the base stage of the triode Q1 connect fortune
The output end of amplifier is calculated, the input terminal of the collector connecting resistance R5 of triode Q1, triode Q1's exports terminating resistor R8's
The other end.
As the further preferred of the utility model, the temperature compensation module include capacitor C5-C7, resistance R9-R12,
Circuit on one side after diode D3, triode Q2, the resistance R9-D10 and diode D3 series connection connects external power, another termination
Ground, the diode D3 just connect, and the capacitor C5 mono- terminates the output end of triode Q1, another terminating resistor R9 and diode D3
Between, the one of the resistance R11 terminates external power, the collector of another termination triode Q2, and the output end of triode Q2 passes through
Resistance R12 ground connection, the capacitor C6 is connected in parallel on resistance R12, between the base stage connecting resistance R9 and diode D3 of triode Q2, institute
The collector of a termination triode Q2 of capacitor C7 is stated, the other end is as signal output end.
The utility model is the utility model has the advantages that the utility model is simple and practical in structure, and the output of light intensity detection circuit is convenient for
Subsequent processing, voltage signal filter module are introduced into the noise reduced in initial signal, and voltage signal pressure stabilizing amplifying circuit is stablized
Voltage signal in circuit, improves circuit anti-interference ability, and last temperature-compensation circuit inhibits light caused by temperature change
The output signal of power detection circuit is drifted about.
Detailed description of the invention
Fig. 1 is the circuit flow diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
The utility model is further described below in conjunction with Figure of description and specific preferred embodiment, but not because
This and limit the protection scope of the utility model.
As shown in Figure 1, a kind of detector circuit for piston cleanliness detection of the present embodiment, including by measured light
Signal is converted into the photoelectric converter 101 of current signal, the current signal that photoelectric converter generates is converted into voltage signal
Current-voltage conversion module 102, will be filtered the voltage signal filter module 103 that noise reduction process is carried out to the voltage signal after conversion
Voltage signal after wave carries out the voltage signal pressure stabilizing amplification module 104 of pressure stabilizing amplification and temperature change is inhibited to produce output signal
The input terminal of the temperature compensation module 105 of raw drift effect, the photoelectric converter 101 and current-voltage conversion module 102 connects
It connects, the output end of the current-voltage signal conversion module 102 is connect with the input terminal of voltage signal filter module 103, described
Voltage signal filter module 103 is connect with the input terminal of voltage signal pressure stabilizing amplification module 104, the voltage signal pressure stabilizing amplification
Module 104 is connect with the input terminal of temperature compensation module 105.
Preferably, electrooptical device 101 is silicon photoelectric diode, is in reverse-biased operating mode in circuit.
The following are the specific structures of the utility model embodiment, but the protection scope of the utility model is not limited to following realities
Apply example.
As shown in Fig. 2, current-voltage conversion module 102 includes resistance R1-R2, capacitor C1-C2, operational amplifier U1, institute
Resistance R1 is stated to be connected in parallel between the reverse side and output end of operational amplifier U1, the capacitor C1 is connected in parallel on the both ends of resistance R1,
The in-phase end of the operational amplifier is grounded by resistance R2, and the capacitor C2 is connected in parallel on resistance R2, two pole of silicon photoelectricity
The cathode of pipe connects the reverse side of operational amplifier, and the output of the operational amplifier terminates the defeated of voltage signal filter module 103
Enter end.
As shown in Fig. 2, voltage signal filter module 103 includes resistance R3-R4, capacitor C3-C4, the resistance R3 and resistance
The output end of one termination operational amplifier U1 of the circuit after R4 series connection, the input of another termination voltage signal pressure stabilizing amplifying circuit
It holds, on the circuit between terminating resistor a R3 and R4 of the capacitor C3, other end ground connection, a terminating resistor of the capacitor C4
The output end of R4, other end ground connection.
As shown in Fig. 2, voltage signal pressure stabilizing amplification module 104 includes zener diode D2, resistance R5-R8, operation amplifier
Device U2, triode Q1, the resistance R7 are variable resistance, a terminating resistor R4 of the resistance R5, another termination operation amplifier
The in-phase end of device U2, the cathode of the zener diode D2 connect the in-phase end of operational amplifier U2, other end ground connection, the resistance
One end of a terminating resistor R6 of R7, the other end ground connection of resistance R6, one end of another terminating resistor R8 of resistance R7, the electricity
The reverse side of the variable resistance termination operational amplifier U2 of R7 is hindered, the base stage of the triode Q1 connects the output end of operational amplifier, and three
The input terminal of the collector connecting resistance R5 of pole pipe Q1, the other end of the output terminating resistor R8 of triode Q1.
As shown in Fig. 2, temperature compensation module 105 includes capacitor C5-C7, resistance R9-R12, diode D3, triode Q2,
Circuit on one side after the resistance R9-D10 and diode D3 series connection connects external power, other end ground connection, and the diode D3 just connects,
The capacitor C5 mono- terminates the output end of triode Q1, between another terminating resistor R9 and diode D3, the one of the resistance R11
External power, the collector of another termination triode Q2 are terminated, the output end of triode Q2 is grounded by resistance R12, the capacitor
C6 is connected in parallel on resistance R12, between the base stage connecting resistance R9 and diode D3 of triode Q2, three poles of termination of the capacitor C7
The collector of pipe Q2, the other end is as signal output end.
As described above, although the utility model has been indicated and described referring to specific preferred embodiment, it must not
It is construed to the limitation to the utility model itself, in the spirit and scope for not departing from the utility model that appended claims define
Under the premise of, it can various changes can be made in the form and details to it.
Claims (6)
1. a kind of detector circuit for piston cleanliness detection, which is characterized in that including measured optical signal to be converted into
The photoelectric converter of current signal, the current-voltage that the current signal that photoelectric converter generates is converted into voltage signal are converted
Module carries out the voltage signal filter module of noise reduction process to the voltage signal after conversion, carries out filtered voltage signal
The voltage signal pressure stabilizing amplification module and inhibition temperature change of pressure stabilizing amplification generate the temperature-compensating of drift effect to output signal
Module, the photoelectric converter are connect with the input terminal of current-voltage conversion module, the current-voltage signal conversion module
Output end connect with the input terminal of voltage signal filter module, the voltage signal filter module and voltage signal pressure stabilizing are amplified
The input terminal of module connects, and the input terminal of the voltage signal pressure stabilizing amplification module and temperature compensation module connects.
2. a kind of detector circuit for piston cleanliness detection according to claim 1, which is characterized in that the light
Power conversion device is silicon photoelectric diode, is in reverse-biased operating mode in circuit.
3. a kind of detector circuit for piston cleanliness detection according to claim 2, which is characterized in that the electricity
Stream-voltage transformation module includes that resistance R1-R2, capacitor C1-C2, operational amplifier U1, the resistance R1 are connected in parallel on operation amplifier
Between the reverse side and output end of device U1, the capacitor C1 is connected in parallel on the both ends of resistance R1, the in-phase end of the operational amplifier
It is grounded by resistance R2, the capacitor C2 is connected in parallel on resistance R2, and the cathode of the silicon photoelectric diode connects operational amplifier
Reverse side, the input terminal of the output termination voltage signal filter module of the operational amplifier.
4. a kind of detector circuit for piston cleanliness detection according to claim 3, which is characterized in that the electricity
Pressure signal filter module includes a termination of the circuit after resistance R3-R4, capacitor C3-C4, the resistance R3 and resistance R4 series connection
The output end of operational amplifier U1, the input terminal of another termination voltage signal pressure stabilizing amplifying circuit, a termination of the capacitor C3
On circuit between resistance R3 and R4, other end ground connection, the output end of a terminating resistor R4 of the capacitor C4, another termination
Ground.
5. a kind of detector circuit for piston cleanliness detection according to claim 4, which is characterized in that the electricity
Pressing signal pressure stabilizing amplification module includes zener diode D2, resistance R5-R8, operational amplifier U2, triode Q1, the resistance R7
For variable resistance, a terminating resistor R4 of the resistance R5, the in-phase end of another termination operational amplifier U2, two pole of pressure stabilizing
The cathode of pipe D2 connects the in-phase end of operational amplifier U2, other end ground connection, one end of a terminating resistor R6 of the resistance R7, electricity
The other end ground connection of R6 is hindered, the variable resistance of one end of another terminating resistor R8 of resistance R7, the resistance R7 terminates operational amplifier
The reverse side of U2, the base stage of the triode Q1 connect the output end of operational amplifier, the collector connecting resistance R5's of triode Q1
Input terminal, the other end of the output terminating resistor R8 of triode Q1.
6. a kind of detector circuit for piston cleanliness detection according to claim 5, which is characterized in that the temperature
Spending compensating module includes capacitor C5-C7, resistance R9-R12, diode D3, triode Q2, the resistance R9-D10 and diode D3
Circuit on one side after series connection connects external power, other end ground connection, and the diode D3 just connects, and the capacitor C5 mono- terminates triode Q1
Output end, between another terminating resistor R9 and diode D3, the resistance R11 one termination external power, three poles of another termination
The output end of the collector of pipe Q2, triode Q2 is grounded by resistance R12, and the capacitor C6 is connected in parallel on resistance R12, triode
Between the base stage connecting resistance R9 and diode D3 of Q2, the collector of a termination triode Q2 of the capacitor C7, other end conduct
Signal output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820888598.6U CN208313847U (en) | 2018-06-08 | 2018-06-08 | A kind of detector circuit for piston cleanliness detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820888598.6U CN208313847U (en) | 2018-06-08 | 2018-06-08 | A kind of detector circuit for piston cleanliness detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208313847U true CN208313847U (en) | 2019-01-01 |
Family
ID=64709739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820888598.6U Expired - Fee Related CN208313847U (en) | 2018-06-08 | 2018-06-08 | A kind of detector circuit for piston cleanliness detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208313847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218999A (en) * | 2021-03-22 | 2021-08-06 | 东莞理工学院 | Detector and detection device for weakening root surface iron membrane and promoting wetland plants to absorb heavy metals |
-
2018
- 2018-06-08 CN CN201820888598.6U patent/CN208313847U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218999A (en) * | 2021-03-22 | 2021-08-06 | 东莞理工学院 | Detector and detection device for weakening root surface iron membrane and promoting wetland plants to absorb heavy metals |
| CN113218999B (en) * | 2021-03-22 | 2022-12-13 | 东莞理工学院 | Detector and detection device for weakening root surface iron membrane and promoting wetland plants to absorb heavy metals |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 Termination date: 20200608 |
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| CF01 | Termination of patent right due to non-payment of annual fee |