Ultrasonic automatic detection device and cable internal damage detection method

Abstract

The invention discloses an ultrasonic automatic detection device and a cable internal damage detection method. The detection device comprises an ultrasonic detection module and a mechanical arm moving device. The ultrasonic detection module comprises a pressure sensor, a first connecting disc, hydraulic telescopic pipes, a second connecting disc, distance measuring sensors and an ultrasonic transceiver. The first connecting disc is installed at the tail end of the mechanical arm moving device through the pressure sensor. The second connecting disc and the first connecting disc are connected through a plurality of hydraulic telescopic pipes. The hydraulic telescopic pipes are evenly distributed in the circumferential direction of the axis of the first connecting disc. A spiral limiting layer is arranged in the side wall of each hydraulic telescopic pipe. The hydraulic telescopic pipes are connected with a hydraulic source and can independently control liquid filling and discharging. The ultrasonic transceiver and a plurality of distance measuring sensors are installed on the outer side of the second connecting disc. The distance measuring sensors are evenly distributed in the circumferential direction of the ultrasonic transceiver. According to the invention, the automatic detection of a flexible structure can be realized, the operation of manually holding the ultrasonic detection device is not needed, and the working efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic detection, and in particular relates to an automatic ultrasonic detection device and a method for detecting internal damage of cables. Background technique [0002] Ultrasound generally refers to high-frequency sound waves with a frequency greater than 20kHz, and can propagate continuously in the medium, with relatively strong reflection ability and very easy to obtain signals. These advantages of ultrasound make it often used in non-destructive testing. Usually, the frequency range used in ultrasonic testing is 0.2-25 MHz. Traditional ultrasonic testing is usually used for objects with a definite structure. If the shape, structure, size, etc. of the object change, the corresponding ultrasonic probe needs to be replaced. For unstructured objects to be inspected, the detection effect is also poor. This is because the ultrasonic probe does not have the characteristics of flexible matching with ...

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Problems solved by technology

For unstructured objects to be inspected, the detection effect is also poor. This is because the ultrasonic probe does not have a flexible matching characteristic with the structure, resulting in scattered ultrasonic signal emission, and does not have the ability to concentrate signals on the area to be inspected.

In addition, traditional ultrasonic testing usually requires manual operation, which is labor-intensive

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