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Pipeline corrosion measuring instrument signal calibration device

A calibration device and technology of corrosion degree, applied in the field of signal calibration, can solve the problems of signal distortion, frequency hopping, uncontrollable working environment of pipeline corrosion detector, etc., and achieve the effect of improving switching speed and load capacity.

Active Publication Date: 2019-04-12
河南鑫安利安全科技股份有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Pipeline corrosion detection refers to the in-pipeline inspection for the purpose of detecting metal loss such as pipe wall corrosion. The signal calibration device of the corrosion degree measuring instrument is to calibrate the collected signal and improve the measurement accuracy of the pipeline corrosion degree measuring instrument. However, in practice, the working environment of the pipeline corrosion measuring instrument is uncontrollable. The analog signal received by the instrument control terminal will hop frequency, and even the signal will be distorted due to insufficient signal power during transmission, which will seriously affect the measurement accuracy of the pipeline corrosion degree measuring instrument

Method used

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  • Pipeline corrosion measuring instrument signal calibration device
  • Pipeline corrosion measuring instrument signal calibration device

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Embodiment 1

[0014] Embodiment 1, a signal calibration device for a pipeline corrosion degree measuring instrument, including a frequency acquisition circuit, a frequency division feedback circuit and a buffer output circuit, the frequency acquisition circuit collects the frequency of an analog signal when the pipeline corrosion degree measuring instrument is working, and the analog signal is the pipeline The corrosion degree measuring instrument controls the signal received by the terminal, and uses the triode Q1, diode D3 and triac VTL1 to filter out abnormal signals. The frequency division feedback circuit uses the inductor L1, capacitor C4, and capacitor C5 to form a frequency division circuit to collect frequency The output signal of the circuit is frequency-divided, and then the push-pull circuit composed of transistor Q3, transistor Q2, transistor Q4, diode D4, and diode D5 is used to process the signal, which not only improves the load capacity of the circuit, but also improves the s...

Embodiment 2

[0016] Embodiment 2, on the basis of Embodiment 1, the buffer output circuit uses the RCD buffer circuit to buffer the signal, which can make the signal smoothly compensate the analog signal when the pipeline corrosion degree measuring instrument is working, so that the signal will not be abnormal, and the resistance One end of R16 is connected to the output end of operational amplifier AR3, the anode of diode D10 and the cathode of diode D11, and the collector of transistor Q5. The other end of resistor R16 is connected to the cathode of diode D10 and one end of capacitor C8. The other end of capacitor C8 is connected to The anode of the diode D11, one end of the resistor R17 and the emitter of the transistor Q5, the base of the transistor Q5 are connected to the cathode of the diode D9, and the other end of the resistor R17 is connected to the signal output port.

[0017]Implementation three, on the basis of embodiment one, the frequency acquisition circuit selects the freque...

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Abstract

The invention discloses a pipeline corrosion measuring instrument signal calibration device. The pipeline corrosion measuring instrument signal calibration device comprises a frequency acquisition circuit, a frequency division feedback circuit and a buffer output circuit. The frequency acquisition circuit collects analog signal frequency when a pipeline corrosion measuring instrument works. The frequency division feedback circuit uses an inductor L1, a capacitor C4 and a capacitor C5 to form a frequency division circuit to conduct frequency demultiplication on an output signal of the frequencyacquisition circuit, then a push-pull circuit composed of an audion Q3, an audion Q2, an audion Q4, a diode D4 and a diode D5 is adopted to process the signal, the signal is input into the buffer output circuit after voltage stabilization by a constant voltage circuit composed of an operational amplifier AR1 and an operational amplifier AR3, an operational amplifier AR2 is used for feeding back the signal to an eemitter potential of the audion Q2, at last, a resistance R16, a capacitor C8 and an audion Q5 are adopted to form a buffer circuit to buffer the signal by the buffer output circuit,and the signal is output. The analog signal frequency can be converted into a compensation signal of the analog signal of the pipeline corrosion measuring instrument, and the signal can be automatically calibrated.

Description

technical field [0001] The invention relates to the technical field of signal calibration, in particular to a signal calibration device for a pipeline corrosion degree measuring instrument. Background technique [0002] Pipeline corrosion detection refers to the in-pipeline inspection for the purpose of detecting metal loss such as pipe wall corrosion. The signal calibration device of the corrosion degree measuring instrument is to calibrate the collected signal and improve the measurement accuracy of the pipeline corrosion degree measuring instrument. However, in practice, the working environment of the pipeline corrosion measuring instrument is uncontrollable. The analog signal received by the instrument control terminal will hop frequency, and even the signal will be distorted due to insufficient signal power during transmission, which seriously affects the measurement accuracy of the pipeline corrosion degree measuring instrument. [0003] So the present invention provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/20H03M1/12
CPCG01N33/20H03M1/1245
Inventor 赵荣华杨蕊侯艳红丁积仓朱俊涛许盈盈师燕滑郑朝晖张现增
Owner 河南鑫安利安全科技股份有限公司
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