Material sonic velocity measurement method

Abstract

The invention relates to a material sound velocity measuring method. The sound velocity of the ultrasonic transverse wave of the work piece material is calculated by measuring the travel time of the ultrasonic transverse wave in work material for two times and using the method for respectively ultrasonic transverse wave incidenting and being received at different angle. The sound velocity of the ultrasonic longitudinal wave and the sound velocity of the ultrasonic surface wave are calculated based on the travel velocity relation of the sound velocity of the ultrasonic transverse wave respectively with the sound velocity of the ultrasonic longitudinal wave and the sound velocity of the ultrasonic surface wave. The sound velocity of the work piece with unknown thickness at project site can be measured. The method is convenient and practical.

Description

technical field [0001] The invention relates to a method for measuring sound velocity of a material. Background technique [0002] At present, the principle of the material sound velocity measurement method stipulated by domestic and foreign standards is to cut the sample from the workpiece to be tested, and after accurately measuring the thickness T of the sample and the propagation time t of the ultrasonic wave in the sample, according to the relationship V = T t , Calculate the speed of sound V. [0003] The premise of the above-mentioned commonly used method to measure the sound velocity of the material is that the sample can be cut from the workpiece to be tested or the thickness of the test piece can be accurately measured by mechanical means. However, when measuring the sound velocity of a certain workpiece material at the engineering site, it is often not allowed to For destructive sampling,...

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Problems solved by technology

[0003]The premise of the above-mentioned commonly used methods to measure the sound velocity of materials is that the sample can be cut from the workpiece to be tested or the thickness of the test piece can be accurately measured by mechanical means, but in the engineering site When measuring the sound velocity of a certain workpiece material, destructive sampling of the workpiece is often not allowed, and even the wall thickness of the workpiece cannot be measured by mechanical methods due to the structure of the workpiece, so the above-mentioned conventional methods cannot be used to measure the sound velocity of the workpiece material

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