Aircraft cable structure integrity online detection method based on ultrasonic guided wave

Abstract

The invention provides an aircraft cable structural integrity online detection method based on ultrasonic guided wave, which comprises the following steps of: The ultrasonic guided wave signal generation module sends a pulse signal; the pulse signal is amplified through a signal amplification module; the amplified pulse signal activates the detection module and the ultrasonic guided wave to be generated by the detection module; a reflection signal is generated when an acoustic wave propagating along an aircraft cable encounters a cable insulation layer defect, the reflection signal causes theMFC sensor to vibrate, deform, and change the amount of charge; a charge amplifier converts the charge signal to a voltage signal and enters the computer for analysis through a multifunctional data acquisition card. Through acquiring the reflection signal, the defect is positioned according to the reflection signal and the emission signal time difference, so that realizing the real-time detectionof the aircraft cable. The aircraft cable structural integrity online detection method based on ultrasonic guided wave has the advantages that the condition of the cable insulation layer can be detected under the condition of operation of the cable, the operation is simple, the positioning precision is high, and electromagnetic field interference is not affected.

Description

technical field [0001] The invention relates to an on-line detection method for aircraft cable structure integrity based on ultrasonic guided waves, and belongs to the technical field of power cable detection. Background technique [0002] As a vital part of the aerospace field, airplanes play a pivotal role in traffic, transportation and military affairs. Aircraft cables are an important medium for the signal transmission of the electronic and electrical systems inside the aircraft. The flight control, avionics, fuel, hydraulic and environmental control systems on the aircraft are organically connected by cables of different specifications and types to form a complete overall system. Realize the timely transmission of various signals and instructions, so the integrity of the cable is an important factor to ensure the safety of aircraft flight. Due to the special environment on the aircraft, cable damage is inevitable, and the damage of aircraft cables has been a thorny pro...

AI Technical Summary

Problems solved by technology

Due to the high test voltage of this method, it will cause certain damage to the insulation of the good cable, which may cause damage to voltage-sensitive components.

Therefore, this method is not suitable for online detection of the insulation characteristics of installed cables.

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