Method and device for realizing conductor fault location

Abstract

The invention relates to a method for positioning the failure of a wire. The method comprises the following steps of: extracting a first test signal from a wire to be tested; performing time delay on the first test signal so as to obtain a second test signal; inputting a third test signal, generated by reflecting the received first test signal at a failure position to be tested, and the second test signal into a multiplier, and outputting a fourth test signal according to the second test signal and the third test signal; performing integral operation on the fourth test signal to obtain a correlation function operation result of the second test signal and the third test signal; and performing peak detection on the correlation function operation result to determine the failure position of the wire. The method has the advantages that a specific test signal does not need to be designed; by using noise or an existing signal in the wire as a test signal, the signal transmission of the wire to be tested can be completely uninfluenced, so that the data integrity of the wire of an aircraft can be ensured; and the method is an ideal method for detecting the multi-branch network failure of the wire on line.

Description

technical field [0001] The invention belongs to the field of fault diagnosis, in particular to a method for realizing wire fault location by using noise domain reflection method. Background technique [0002] Aircraft wire is a hardware device that provides power energy and transmits control signals for the aircraft electrical system. It is an important energy and information channel connecting power supply, electromechanical equipment, electronic equipment and control systems on the aircraft. With the growth of aircraft age, aircraft wires work in a complex environment for a long time, and are prone to failures such as insulation layer wear, aging, and corrosion, which eventually lead to short circuits and open circuits of aircraft wires, which pose a hazard to flight safety. Among the existing fault detection methods of aircraft wires, the time domain reflection detection method is a general testing technique. The principle of the time domain reflection method is to trans...

AI Technical Summary

Problems solved by technology

Although the spread spectrum method can monitor the aircraft wires online, it still needs to transmit the PN code as a test signal, which affects the data transmission of the aircraft wires, and the wires of the multi-branch network structure are difficult to detect

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