Detecting method for long-distance full-characteristic analysis of target pipeline and device thereof

Abstract

Disclosed are a detection method and a device for remote full-characteristic analysis on a cable to be tested; the method and the device enable multi-loop full-characteristic analysis on the cable to be tested through voltage, current, amplitude, direction, phase signals and the like; the method and the device have the advantages that the multiple signals can be collected at the same time; the homologous homo-body transmission signals and the homologous allogeneic induction interference signals can be highly accurately identified in the case of no power-off; and the device is provided with the working condition assessment uniqueness to identify the cable to be tested. Fixed-frequency audio signals are loaded to pipelines through a transmitting device; the whole signals of all the cables in the block are collected at the detection end in one time; a receiving device captures the signals and then filters and amplifies the signals; the signals equivalent to the transmitting frequency are compared with the reference signal, and then go through digital processing, comparison and calculation to obtain the current values of each group of signals, the resistance values of each loop, the phase angles of each acquisition signal, and the phase offset degrees between the acquisition signals and the reference signal; and the cable which has the same characteristics with the known reference signal is the required cable.

Description

1. Technical field [0001] The invention belongs to the field of electric power detection, and relates to a method and equipment specially used for full-feature analysis of high-accuracy and unique identification of target pipelines and phases in long-distance detection of multi-loop (parallel) running cables. 2. Background technology [0002] In my country's power grid construction, the laying of cables into the ground has become a common use of power departments or companies and has become more and more a trend. The reason is that there are more and more cases where the data of underground cables are inconsistent with the actual working conditions. A large number of trenchless cable trackers and detectors have also been developed at home and abroad for cable detection. Through data retrieval and market investigation and analysis, we learned that most of the current research on cable detection technology focuses on tracking and detection, but in actual work, due to the intric...

AI Technical Summary

Problems solved by technology

When using this method for identification, it is necessary for the inspector to have rich on-site experience before it can be implemented, and because the signal is weak, there are many cases of misjudgment, and the feasibility and reliability are poor.

[0005] In addition, there is also a method of detecting by injecting a DC pulse signal into the cable conductor. This method has high accuracy, but it can only be implemented in the case of power outage maintenance or untie the ground pile. The former (in the case of power outage maintenance) The requirements for the working conditions of the measurement are high, and the implementation is difficult; while the latter (in the case of unlocking the ground pile) has a great impact on the safety of the operating equipment and the measurement personnel, and the feasibility is poor

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