Device and method for measuring transverse wave sound velocity at high temperature

Abstract

The invention discloses a device and a method for measuring transverse wave sound velocity at high temperature, and belongs to the technical field of sound velocity measurement. The device comprises a heating device, a transverse wave sound velocity measurement test block, a tapered wedge block and an ultrasonic longitudinal wave detection system, one end of the transverse wave sound velocity measurement test block is a step structure, and the other end is an inclined surface; the step structure is connected with the heating device, the inclined surface is connected with the tapered wedge block through the coupling agent layer, and the tapered wedge block is connected with the ultrasonic longitudinal wave detection system through the coupling agent layer; the incidence angle of longitudinal waves emitted by the ultrasonic longitudinal wave detection system entering the transverse wave sound velocity measurement test block is between a first critical angle and a second critical angle; and the sum of the included angle between the inclined surface and the bottom surface of the transverse wave sound velocity measurement test block and the refraction angle of the longitudinal wave emitted by the ultrasonic longitudinal wave detection system entering the transverse wave sound velocity measurement test block is 90 degrees. According to the invention, the sound velocity of the transverse wave at high temperature can be accurately measured, and the operability is high.

Description

technical field [0001] The invention belongs to the technical field of sound velocity measurement, and in particular relates to a device and method for measuring the sound velocity of a shear wave at high temperature. Background technique [0002] When ultrasonic waves are used to detect the workpiece, the ultrasonic beam will be partially reflected when it encounters a defect in the workpiece. Whether there is a defect in the workpiece can be judged from the presence or absence of the reflected wave; the location of the defect can be judged from the propagation time of the reflected wave. Accurate measurement of ultrasonic sound velocity is particularly critical in order to locate defects. Since many devices operate at high temperatures, on-line detection or monitoring of hazardous defects has a very broad application prospect. Knowing the speed of sound at different temperatures is an important prerequisite for on-line supervisory inspection. The sound velocity will chang...

AI Technical Summary

Problems solved by technology

At normal temperature, the sound velocity of shear wave can be measured by contact method, but the sound velocity measurement at high temperature will face the tolerance problem of ultrasonic longitudinal wave transducer and coupling agent, and the transducer will greatly reduce the echo in high temperature environment sensitivity, the coupling agent will volatilize or react chemically with oxygen, and the detection accuracy is poor

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