A Portable Ultrasonic Probe Pressure Regulating Device and Using Method

Abstract

The invention discloses a portable ultrasonic probe pressure adjusting device, which comprises a clamping mechanism, a probe adjusting mechanism and a pressure sensing mechanism. The portable ultrasonic probe pressure adjusting device has the advantage that the coupling pressure between an ultrasonic probe and a specimen is controlled by a pressure-sensitive sensor, and is displayed by a digital display type, so that the constant coupling pressure between the ultrasonic probe and the specimen is guaranteed, namely that an ultrasonic signal is stable; the influence to the ultrasonic signal caused by continuous adding of a coupling agent in the ultrasonic signal collecting process is avoided; the problem of influence to the ultrasonic evaluation stress caused by the instable coupling state between the ultrasonic probe and the specimen in the existing ultrasonic evaluation stress technique is solved, and the measurement of stress along different directions is convenient. The invention also discloses a use method of the portable ultrasonic probe pressure adjusting device.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic non-destructive evaluation, and in particular relates to an ultrasonic probe fixture and a using method. Background technique [0002] With the rapid development of economy and society, the development of welding materials and welding methods shows a trend of diversification, and the application of welding structures is becoming more and more extensive, such as ships, automobile industry, oil pipelines, aerospace and other fields. The failure of welded structural parts not only causes economic losses to enterprises and society, but also threatens the safety of workers. Therefore, the service safety guarantee of welded structural parts is very important to the development and application of welding technology in the industrial field. Relevant studies have shown that there are many factors affecting the service safety of welded structures, and welding residual stress is one of the important facto...

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Problems solved by technology

[0003] Ultrasonic method is a method of stress evaluation based on ultrasonic acoustoelasticity theory, that is, the ultrasonic propagation velocity and stress have a strict linear relationship, but the acoustoelastic effect is a weak effect. Generally speaking, when the stress changes by 100MPa, The change of propagation velocity in is about 0.1%, so it is very difficult to accurately measure the ultrasonic propagation velocity during the experiment

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