CN109613201B - Signal compensation circuit of pipeline corrosion degree measuring instrument - Google Patents
Signal compensation circuit of pipeline corrosion degree measuring instrument Download PDFInfo
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- CN109613201B CN109613201B CN201811634495.8A CN201811634495A CN109613201B CN 109613201 B CN109613201 B CN 109613201B CN 201811634495 A CN201811634495 A CN 201811634495A CN 109613201 B CN109613201 B CN 109613201B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
Abstract
The invention discloses a signal compensation circuit of a pipeline corrosion degree measuring instrument, which comprises a frequency acquisition circuit, a push-pull buffer circuit and a compensation output circuit, wherein the frequency acquisition circuit acquires the analog signal frequency when the pipeline corrosion degree measuring instrument works, the push-pull buffer circuit comprises a triode Q3, a triode Q4, a triode Q5, a diode D4 and a diode D3 and processes signals, the buffer circuit comprising a resistor R8, a capacitor C4 and a triode Q6 buffers the signals, the triode Q7 feeds back an output signal of an operational amplifier AR1 to an emitter of the triode Q5, finally the operational amplifier AR2 amplifies the signals in phase and inputs the signals into the compensation output circuit, the compensation output circuit divides the voltage by a variable resistor RW2 by using a power supply +10V and outputs the signals by a compensation operational amplifier AR2, and the resistor R16, the resistor R17, the capacitor C5 and the capacitor C6 form an RC circuit which outputs after filtering, the frequency of the analog signal can be converted into a compensation signal of the analog signal of the pipeline corrosion degree measuring instrument.
Description
Technical Field
The invention relates to the technical field of signal calibration, in particular to a signal compensation circuit of a pipeline corrosion degree measuring instrument.
Background
The pipeline corrosion detection refers to the detection in a pipeline aiming at detecting metal loss such as pipe wall corrosion and the like, and is used for knowing the condition that the pipeline in service is damaged in a working environment, so as to ensure that defects and damage are detected before serious problems occur to the pipeline, and a signal compensation circuit of a pipeline corrosion measuring instrument calibrates acquired signals, so that the measurement precision of the pipeline corrosion measuring instrument is improved.
The present invention provides a new solution to this problem.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a signal compensation circuit for a pipeline corrosion degree measuring instrument, which has the characteristics of ingenious design and humanized design, can convert the analog signal frequency into a compensation signal of the analog signal of the pipeline corrosion degree measuring instrument, and can automatically calibrate the signal and stabilize the signal frequency.
The technical scheme includes that the signal compensation circuit of the pipeline corrosion degree measuring instrument comprises a frequency acquisition circuit, a push-pull buffer circuit and a compensation output circuit, wherein the frequency acquisition circuit acquires the frequency of an analog signal when the pipeline corrosion degree measuring instrument works, the analog signal is a signal received by a control terminal of the pipeline corrosion degree measuring instrument, a switching circuit consisting of a triode Q1 and a triode Q2 is used for isolating a low-level signal, the push-pull buffer circuit performs signal processing by using a push-pull circuit consisting of a triode Q3, a triode Q4, a triode Q5, a diode D4 and a diode D3, the load capacity of the circuit is improved, the switching speed is improved, meanwhile, a buffer circuit consisting of a resistor R8, a capacitor C4 and a triode Q6 is used for buffering the signal, an operational amplifier AR1 is used for feeding back the signal to an emitter of the triode Q5, the signal conduction value of the push-pull circuit is adjusted, finally, the operational amplifier AR2 amplifies signals in phase and then inputs the signals into a compensation output circuit, the compensation output circuit applies a power supply +10V to compensate the signals output by the operational amplifier AR2 after voltage division through a variable resistor RW2, and an RC circuit consisting of a resistor R16, a resistor R17, a capacitor C5 and a capacitor C6 is used for filtering and outputting the signals, namely analog signals when the compensation pipeline corrosion degree measuring instrument works;
the push-pull buffer circuit comprises a diode D4, the cathode of the diode D4 is connected with the anode of a diode D3, the cathode of a diode D3 is connected with the base of a triode Q5, the anode of a diode D4 is connected with the base of a triode Q3 and one end of a resistor R2, the collector of a triode Q3 is connected with +5V, one end of a resistor R2, the collector of a triode Q2 and the non-inverting input end of an operational amplifier AR2, the base of the triode Q2 is connected with the emitter of the triode Q2 and the collector of the triode Q2, the base of the triode Q2 is connected with the cathode of the diode D2, the emitter of the triode Q2 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with ground, the inverting input end of the operational amplifier AR2 is connected with one end of the resistor R2 and one end of the resistor R2, the other end of the negative end of the voltage regulator D2 and one end of a capacitor C2, and the output end of the operational amplifier AR, The other end of the resistor R and the other end of the resistor R are connected with the emitting electrode of the triode Q, the other end of the resistor R is connected with the emitting electrode of the operational amplifier AR, the inverting input end of the operational amplifier AR is connected with one end of the resistor R and the resistor R, and the other end of the resistor R is connected with the other end of the resistor R, the output end of the operational amplifier AR2 is connected with the other end of the resistor R14.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. the signal is processed by using a push-pull circuit consisting of a triode Q3, a triode Q4, a triode Q5, a diode D4 and a diode D3, the load capacity of the circuit is improved, the switching speed is also improved, in addition, an operational amplifier AR1 is used for amplifying signals in phase, in order to prevent the signals from being directly input into the in-phase input end of an operational amplifier AR2, a buffer circuit consisting of a resistor R8, a capacitor C4 and a triode Q6 is used for buffering the signals, so that the signals are smoothly input into the in-phase input end of the operational amplifier AR2, and the stability of the signals is ensured;
2. the triode Q7 is used for feeding back an output signal of the operational amplifier AR1 to an emitter of the triode Q5, when the potential of the output signal of the operational amplifier AR1 is too high, the triode Q7 is conducted, a signal is fed back to an emitter of the triode Q5, the potential of the emitter of the triode Q5 is increased, namely the conducting potential of a base of the trigger triode Q4 is reduced, the effect of reducing the signal conducting value of a push-pull circuit is achieved, and automatic calibration of the signal is achieved;
3. the potential of the compensation signal can be changed by adjusting the resistance potential of the variable resistor RW2, because the potential value of the push-pull buffer circuit is not enough to compensate the analog signal when the pipeline corrosion degree measuring instrument works, the base potential of the output signal of the operational amplifier AR2 is obtained after the voltage of the external power supply +10V is divided by the variable resistor RW2, and the resistor R16, the resistor R17, the capacitor C5 and the capacitor C6 are used to form an RC circuit for filtering and outputting, namely the analog signal when the pipeline corrosion degree measuring instrument works is compensated, so that the signal distortion caused by the insufficient signal power is prevented.
Drawings
FIG. 1 is a block diagram of a signal compensation circuit of the pipeline corrosion meter according to the present invention.
FIG. 2 is a schematic diagram of a signal compensation circuit of the pipeline corrosion meter according to the present invention.
FIG. 3 is a schematic diagram of a push-pull buffer circuit in the signal compensation circuit of the pipeline corrosion meter according to the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
In the first embodiment, the signal compensation circuit of the pipeline corrosion degree measuring instrument comprises a frequency acquisition circuit, a push-pull buffer circuit and a compensation output circuit, wherein the frequency acquisition circuit acquires the frequency of an analog signal when the pipeline corrosion degree measuring instrument works, the analog signal is a signal received by a control terminal of the pipeline corrosion degree measuring instrument, a switch circuit consisting of a triode Q1 and a triode Q2 is used for isolating a low-level signal, the push-pull buffer circuit uses a push-pull circuit consisting of a triode Q3, a triode Q4, a triode Q5, a diode D4 and a diode D3 for processing the signal, the load capacity of the circuit is improved, the switching speed is improved, meanwhile, a buffer circuit consisting of a resistor R8, a capacitor C4 and a triode Q6 is used for buffering the signal, the triode Q7 is used for feeding back an operational amplifier AR1 to output the signal to an emitter of the triode Q5, the signal conduction value of the push-pull circuit is adjusted, and finally, the operational amplifier, finally, the compensation output circuit applies a power supply of +10V to output a signal after voltage division through a variable resistor RW2 and then compensates an operational amplifier AR2, and applies a resistor R16, a resistor R17, a capacitor C5 and a capacitor C6 to form an RC circuit for filtering and outputting, namely, the RC circuit is an analog signal when the compensation pipeline corrosion degree measuring instrument works;
the push-pull buffer circuit utilizes a push-pull circuit composed of a triode Q3, a triode Q4, a triode Q5, a diode D4 and a diode D3 to process signals, so that the load capacity of the circuit is improved, the switching speed is improved, in addition, an operational amplifier AR1 in-phase amplification signal is utilized, in order to prevent the signals from being directly input into the in-phase input end of the operational amplifier AR2, a buffer circuit composed of a resistor R8, a capacitor C4 and a triode Q6 is utilized to buffer the signals, so that the signals are gently input into the in-phase input end of the operational amplifier AR2, in order to further stabilize the signals at the in-phase input end of the operational amplifier AR2, a triode Q7 is utilized to feed back the operational amplifier AR1 to output signals to the emitter 92 of the triode Q5, when the output signal potential of the operational amplifier AR1 is too high, the triode Q7 is conducted, the feedback signals are also namely the emitter of the, the function of reducing the signal conduction value of a push-pull circuit is realized, wherein a resistor R9 and a capacitor C3 are filter circuits, finally an operational amplifier AR2 amplifies signals in phase and inputs the signals into a compensation output circuit, the in-phase input end of the operational amplifier AR2 is two-way signal input, one way is signal potential output by an operational amplifier AR1, the other way is signals buffered by a buffer circuit, the operational amplifier AR2 plays a role of an addition circuit, the negative electrode of a diode D4 is connected with the positive electrode of a diode D3, the negative electrode of a diode D3 is connected with the base electrode of a triode Q5, the positive electrode of a diode D4 is connected with the base electrode of a triode Q3 and one end of a resistor R2, the collector electrode of a triode Q3 is connected with a power supply +5V, one end of the resistor R2 and the collector electrode of a triode Q4 and the in-phase input end of the operational amplifier AR1, the base electrode of a triode Q4 is connected with the emitter electrode of a triode Q3 and the collector electrode of a triode Q5, the, the other end of the resistor R6 is grounded, the inverting input end of the operational amplifier AR 6 is connected with one end of the resistor R6 and one end of the resistor R6, the other end of the resistor R6 is grounded, the output end of the operational amplifier AR 6 is connected with the other end of the resistor R6, one end of the resistor R6 and the negative electrode of the voltage regulator tube D6, one end of the capacitor C6, the positive electrode of the diode D6 and the positive electrode of the diode D6, the collector of the transistor Q6 and the negative electrode of the diode D6 are grounded, the other end of the capacitor C6 is connected with one end of the capacitor C6, the other end of the capacitor C6 is connected with the positive electrode of the diode D6, the emitter of the transistor Q6 and one end of the resistor R6, the base of the transistor Q6 is connected with the negative electrode of the diode D6 and the collector of the transistor R6, the emitter of the transistor Q6 is connected with the cathode of the voltage regulator tube D6, and one end of the capacitor C6 and the voltage regulator tube D6 are connected with the anode of the voltage, the other ends of the resistor R9 and the capacitor C3 are connected with one end of a resistor R4, the other end of the resistor R4 is connected with an emitter of a triode Q5, the other ends of the resistor R10 and the resistor R11 are connected with a non-inverting input end of an operational amplifier AR2, an inverting input end of the operational amplifier AR2 is connected with one ends of a resistor R12 and a resistor R14, the other end of the resistor R12 is grounded, and the output end of the operational amplifier AR2 is connected with the other end of a resistor R14.
In the second embodiment, on the basis of the first embodiment, the compensation output circuit applies a power supply +10V to compensate the output signal of the operational amplifier AR2 after being divided by the variable resistor RW2, the potential of the compensation signal can be changed by adjusting the resistance potential of the variable resistor RW2, because the potential value of the push-pull buffer circuit is not enough to compensate the analog signal when the pipeline corrosion meter operates, the external power supply +10V is applied to be divided by the variable resistor RW2 to be the base potential of the output signal of the operational amplifier AR2, and the resistor R16, the resistor R17, the capacitor C5 and the capacitor C6 are applied to form an RC circuit to be filtered and then output, that is, the analog signal when the pipeline corrosion meter operates, one end of the resistor R16 is connected to one end of the capacitor C5 and the negative electrode of the diode D12, the positive electrode of the diode D12 is connected to the contact 2 of the variable resistor RW2, the contact 1 of the variable resistor RW 48 is connected to the negative electrode of the diode D11, and one end of the positive electrode of, the other end of the resistor R15 is connected with one end of a resistor R13 and the anode of a diode D10, the contact 3 of the variable resistor RW2 and the cathode of the diode D10 are grounded, the other end of the resistor R13 is connected with a power supply +10V, the other end of the capacitor C5 is grounded, the other end of the resistor R16 is connected with one ends of the resistor R17 and the capacitor C6, the other end of the capacitor C6 is grounded, and the other end of the resistor R17 is connected with a signal output port.
Third, on the basis of the first embodiment, the frequency acquisition circuit selects a frequency collector J1 with the model of SJ-ADC to acquire the frequency of the analog signal when the pipeline corrosion meter works, the analog signal is a signal received by the control terminal of the pipeline corrosion meter, a triode Q1 and a triode Q2 are used to form a switch circuit to isolate a low-level signal, when the signal is at a low level, the triode Q2 is not enough to be conducted, so that the effect of isolating the low-level signal is realized, the power supply of the frequency collector J1 is connected with one end of a capacitor C1 and a power supply of +5V, the grounding end of a frequency collector J1 is grounded, the output end of the frequency collector J1 is connected with the other end of the capacitor C1, the negative electrode of a voltage regulator D1, one end of a resistor R1, the collector electrode of the triode Q1 and the collector electrode of the triode Q2, the positive electrode of the voltage regulator D1 is grounded, the base electrode of the triode Q1, the anode of the voltage regulator tube D2 is grounded, the emitter of the triode Q1 is connected with the base of the triode Q2, and the emitter of the triode Q2 is connected with the anode of the diode D3.
When the invention is used in concrete, the signal compensation circuit of the pipeline corrosion degree measuring instrument comprises a frequency acquisition circuit, a push-pull buffer circuit and a compensation output circuit, wherein the frequency acquisition circuit acquires the frequency of an analog signal when the pipeline corrosion degree measuring instrument works, the analog signal is a signal received by a control terminal of the pipeline corrosion degree measuring instrument, a switching circuit consisting of a triode Q1 and a triode Q2 is used for isolating a low-level signal, the push-pull buffer circuit uses a push-pull circuit consisting of a triode Q3, a triode Q4, a triode Q5, a diode D4 and a diode D3 for signal processing, the load capacity of the circuit is improved, the switching speed is improved, an operational amplifier AR1 is used for amplifying a signal in phase, in order to prevent the signal from being directly input into the in-phase input end of an operational amplifier AR2, a buffer circuit consisting of a resistor R8, a capacitor C4 and a triode Q6 is used for signal buffering, so that the signal, in order to further stabilize the signal at the non-inverting input terminal of the operational amplifier AR2, the transistor Q7 is used to feed back the output signal of the operational amplifier AR1 to the emitter of the transistor Q5, when the output signal of the operational amplifier AR1 is too high, the transistor Q7 is turned on, the feedback signal is fed to the emitter of the transistor Q5, the emitter of the transistor Q5 is raised in potential, that is, the conducting potential of the base of the transistor Q4 is lowered, so as to reduce the signal conducting value of the push-pull circuit, wherein the resistor R9 and the capacitor C3 are filter circuits, finally the non-inverting amplified signal of the operational amplifier AR2 is input into the compensation output circuit, the non-inverting input terminal of the operational amplifier AR2 is two-way signal input, one way is the signal potential output by the operational amplifier AR1, the other way is the signal buffered by the buffer circuit, the operational amplifier AR2 functions as an adder circuit, finally the compensation output circuit compensates the operational amplifier AR2 output signal, and a resistor R16, a resistor R17, a capacitor C5 and a capacitor C6 are used for forming an RC circuit which outputs after filtering, namely, the RC circuit is an analog signal when the compensation pipeline corrosion degree measuring instrument works.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (3)
1. The signal compensation circuit of the pipeline corrosion degree measuring instrument comprises a frequency acquisition circuit, a push-pull buffer circuit and a compensation output circuit, and is characterized in that the frequency acquisition circuit acquires the frequency of an analog signal when the pipeline corrosion degree measuring instrument works, the analog signal is a signal received by a control terminal of the pipeline corrosion degree measuring instrument, a switch circuit comprising a triode Q1 and a triode Q2 is used for isolating a low-voltage signal, the push-pull buffer circuit processes the signal by using a push-pull circuit comprising a triode Q3, a triode Q4, a triode Q5, a diode D4 and a diode D3, the load capacity of the circuit is improved, the switching speed is improved, meanwhile, the buffer circuit comprising a resistor R8, a capacitor C4 and a triode Q6 is used for buffering the signal, an operational amplifier AR1 is used for feeding back the triode Q7 to output the signal to an emitter of the triode Q5, and the signal push-pull conduction value of, finally, the operational amplifier AR2 amplifies signals in phase and then inputs the signals into a compensation output circuit, the compensation output circuit applies a power supply +10V to compensate the signals output by the operational amplifier AR2 after voltage division through a variable resistor RW2, and an RC circuit consisting of a resistor R16, a resistor R17, a capacitor C5 and a capacitor C6 is used for filtering and outputting the signals, namely analog signals when the compensation pipeline corrosion degree measuring instrument works;
the push-pull buffer circuit comprises a diode D4, the cathode of the diode D4 is connected with the anode of a diode D3, the cathode of a diode D3 is connected with the base of a triode Q5, the anode of a diode D4 is connected with the base of a triode Q3 and one end of a resistor R2, the collector of a triode Q3 is connected with +5V, one end of a resistor R2, the collector of a triode Q2 and the non-inverting input end of an operational amplifier AR2, the base of the triode Q2 is connected with the emitter of the triode Q2 and the collector of the triode Q2, the base of the triode Q2 is connected with the cathode of the diode D2, the emitter of the triode Q2 is connected with one end of a resistor R2, the other end of the resistor R2 is connected with ground, the inverting input end of the operational amplifier AR2 is connected with one end of the resistor R2 and one end of the resistor R2, the other end of the negative end of the voltage regulator D2 and one end of a capacitor C2, and the output end of the operational amplifier AR, The anode of the diode D6, the collector of the transistor Q6, the cathode of the diode D6, the other end of the capacitor C6 is grounded, the other end of the resistor R6 and the cathode of the diode D6 are connected to one end of the capacitor C6, the other end of the capacitor C6 is connected to the anode of the diode D6, the emitter of the transistor Q6 and one end of the resistor R6, the base of the transistor Q6 is connected to the cathode of the diode D6, one end of the resistor R6, the other end of the resistor R6 and the collector of the transistor Q6, the emitter of the transistor Q6 is connected to the cathode of the regulator D6, the anode of the regulator D6 is connected to one end of the resistor R6, the resistor R6 and the other end of the capacitor C6, the other end of the resistor R6 is connected to one end of the in-phase input end of the resistor R6, and the anti-phase amplifier R6 are connected to the in-phase input end of the resistor R6 and the anti-phase amplifier 6. The other end of the resistor R12 is grounded, and the output end of the operational amplifier AR2 is connected with the other end of the resistor R14.
2. The pipeline corrosivity measuring instrument signal compensation circuit as claimed in claim 1, wherein the compensation output circuit comprises a resistor R16, one end of the resistor R16 is connected with one end of a capacitor C5 and the negative electrode of a diode D12, the positive electrode of a diode D12 is connected with a contact 2 of a variable resistor RW2, a contact 1 of the variable resistor RW2 is connected with the negative electrode of a diode D11, the positive electrode of a diode D11 is connected with one end of a resistor R15, the other end of a resistor R15 is connected with one end of a resistor R13 and the positive electrode of a diode D10, a contact 3 of the variable resistor RW2 and the negative electrode of a diode D10 are grounded, the other end of the resistor R13 is connected with +10V of a power supply, the other end of a capacitor C5 is grounded, the other end of the resistor R16 is connected with one end of a resistor R17 and one end of a capacitor C6, the other end of the.
3. The signal compensation circuit of the pipeline corrosion meter according to claim 1, wherein the frequency acquisition circuit comprises a frequency collector J1 with the model number SJ-ADC, a power supply of the frequency collector J1 is connected with one end of a capacitor C1 and a power supply of +5V, a grounding end of the frequency collector J1 is grounded, an output end of the frequency collector J1 is connected with the other end of a capacitor C1 and a negative electrode of a voltage regulator tube D1, one end of a resistor R1 and a collector electrode of a triode Q1 and a triode Q2, an anode of the voltage regulator tube D1 is grounded, a base electrode of a triode Q1 is connected with the other end of a resistor R1 and the negative electrode of a voltage regulator tube D2, a positive electrode of a voltage regulator tube D2 is grounded, an emitter electrode of a triode Q1 is connected with a base electrode of a triode Q2, and an emitter electrode of a triode Q.
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| CN110176851A (en) * | 2019-05-14 | 2019-08-27 | 郑州工业应用技术学院 | A kind of electric power regulation device |
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| CN110417433B (en) * | 2019-08-30 | 2020-03-27 | 黄河科技学院 | Agricultural greenhouse data transmission system |
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| CN110968012A (en) * | 2019-12-26 | 2020-04-07 | 郑州科技学院 | Electronic signal compensation device |
| CN111245427B (en) * | 2020-01-14 | 2021-03-30 | 武汉大数据产业发展有限公司 | Big data real-time monitoring system |
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