Failure detection device of cathode protection sensor and detection method thereof

By designing a failure detection device for cathode protection sensors, using the current judgment method of the comparison test piece and the monitoring test piece, the problem of sensor failure monitoring in the prior art requires manual judgment and inability to distinguish the failure of the reference electrode and the test piece is achieved, and the effect of remote monitoring and accurate distinction is achieved.

CN119716346APending Publication Date: 2025-03-28QINGDAO YAHE SCI & TECH DEV
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Patent Information

Application Number
CN202510019639.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-07
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The failure monitoring of existing cathode protection monitoring sensors requires manual judgment and cannot distinguish between reference electrode failure and test piece failure, resulting in increased monitoring difficulty and work burden.

Method used

A failure detection device for cathode protection sensor is designed. By setting the comparison test piece and the monitoring test piece to connect to the same line, both are connected to the protected pipe and polarized. When the polarization connection is disconnected, a test ammeter is used to determine whether there is a current reading flowing from the monitoring test piece to the comparison test piece and exceeding the threshold, thereby determining whether the monitoring test piece is invalid.

Benefits of technology

Remote monitoring of whether the negative and insurance monitoring sensor is invalid is realized, and it can accurately distinguish between reference electrode failure and test piece failure, reducing the difficulty and work burden of monitoring, and solving the problem of manual judgment and distinction difficulties.

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Abstract

A failure detection device of a cathode protection sensor comprises a monitoring terminal, a monitoring sensor, a polarized wire, a reference test piece and a test ampere meter, and the test ampere meter is arranged on the polarized wire and located between an electrical connection point of the reference test piece and an electrical connection point of the monitoring test piece. And the test ampere meter judges whether the monitoring test piece fails or not according to the current reading when the main circuit switch is switched off. The invention discloses a failure detection method. The method comprises steps S10 to S50. According to the embodiment of the invention, the comparison test piece is arranged, so that whether the monitoring test piece is invalid or not is judged by testing whether the current reading on the ammeter flows from the monitoring test piece to the comparison test piece and exceeds the threshold value or not when the polarization connection of the two is disconnected, and remote monitoring of whether the cathode protection monitoring sensor is invalid or not can be realized; in addition, reference electrode failure and test piece failure can be accurately distinguished, and the monitoring difficulty and workload are reduced.
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