Cathode protection parameter detection method and equipment for buried pipeline and storage medium

Abstract

The embodiment of the invention discloses a cathode protection parameter detection method and device for a buried pipeline and a storage medium, and the method comprises the steps: carrying out the frequency division of a pipeline potential signal of the buried pipeline through a high-pass filter, and obtaining a power frequency AC interference signal; performing frequency division on the pipeline potential signal by adopting a low-pass filter to obtain a composite signal of a direct-current signal and an extremely-low-frequency alternating-current interference signal; frequency division is carried out on the composite signal by adopting a digital filtering technology, so that a direct-current signal and an extremely-low-frequency alternating-current interference signal are obtained through separation; performing frequency division on the composite signal by adopting a power-off measurement method to obtain an effective direct-current protection potential signal; determining a direct-current interference signal according to the difference between the direct-current signal and the effective direct-current protection potential signal; power frequency alternating current interference signals, extremely low frequency alternating current interference signals, effective direct current protection potential signals and direct current interference signals are detected and output at the same time. The method has the advantages of convenience, rapidness, accuracy, comprehensiveness and wide application range, and can be widely applied to the field of buried pipeline protection.

Description

technical field [0001] The invention relates to the technical field of buried pipeline protection, in particular to a method, equipment and storage medium for detecting cathodic protection parameters of buried pipelines. Background technique [0002] Accurate measurement of protection parameters such as cathodic protection potential of underground metal pipelines is a basic means to control pipeline corrosion and ensure pipeline operation safety. At present, the operating environment of the urban underground pipeline network is becoming more and more complex, and the underground pipeline network is more and more seriously affected by stray currents. The cathodic protection potential of buried pipelines shows a complex form of weak effective signals and strong interference signals, which may It will make the effective signal submerged in the interference signal, and it is difficult to complete the correct detection of the pipeline potential. [0003] At present, the detectio...

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Problems solved by technology

[0004] The disadvantage of the direct measurement method is: in the face of a complex stray current environment, the cathodic protection potential of the pipeline is a complex signal composed of a weak effective signal and a strong interference signal. When the direct measurement method is used for detection, the reading of the meter often shows Large fluctuations, resulting in the inability to read the accurate value of the pipeline protection potential and determine the correctness of the data

[0005] The principle of the polarization probe detection method is to use a circular polarized test piece, place the reference electrode in the center of the circular test piece, shield the interference current and then detect it. Its main disadvantage is that it needs to wait for the test piece to complete polarization during measurement , it takes a long time and the measurement efficiency is very low; in the case of serious stray current interference, the test piece of the polarization probe cannot form a stable polarization state, and the current shielding effect becomes poor at this time, and the reliability of the measurement results Not guaranteed, sometimes not even complete measurements

[0006] The power-off potential detection method is a method of measuring the pipeline potential while cutting off the power supply by cutting off the power supply on the pipeline. Its main disadvantage is that the interference source on the pipeline cannot usually be cut off in engineering practice, which leads to the failure of this measurement method

[0007] The polarized test piece electric potential detection method is to use the polarization potential substitution principle of the polarized test piece to measure. In the case of serious current interference, the polarization process of the polarized test piece is unstable, resulting in a large randomness of the measurement results

[0008] None of the above detection methods can realize convenient, fast, accurate and comprehensive detection of complex protection potential signals composed of weak effective signals and strong interference signals of buried pipelines, and the scope of application is not wide

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