Ultrasonic probe device and workpiece sound velocity measuring method

Abstract

The invention provides an ultrasonic probe device and a workpiece sound velocity measuring method. The ultrasonic probe device comprises a first transverse wave probe, a second transverse wave probe and a measuring scale. The first transverse wave probe and the second transverse wave probe are both arranged on the measuring scale in a sliding mode, and the incident angles of the first transverse wave probe and the second transverse wave probe are the same. The first transverse wave probe and the second transverse wave probe adopt a one-transmitting and one-receiving mode. According to the invention, the first transverse wave probe and the second transverse wave probe are arranged on the measuring scale in a sliding manner, and the distance between the incident points of the two transversewave probes is measured through the measuring scale; one transverse wave probe is used for transmitting ultrasonic transverse waves to a to-be-detected workpiece, and the other transverse wave probe is used for receiving reflection echoes reflected by the to-be-detected workpiece; and the sound velocity in the to-be-detected workpiece is detected according to the distance between the incident points of the two transverse wave probes and the propagation time of the ultrasonic transverse waves in the to-be-detected workpiece, the thickness of the to-be-detected workpiece does not need to be obtained in the detection process, the requirement for detecting the sound velocity of a workpiece with unknown thickness is met, and the accuracy of the measurement result is high.

Description

technical field [0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to an ultrasonic probe device and a method for measuring sound velocity of a workpiece. Background technique [0002] At present, the commonly used ultrasonic testing methods for the sound velocity of materials are mainly pulse reflection method and resonance method, etc. Among them, the pulse reflection method calculates the longitudinal wave sound velocity in the material by obtaining the propagation time interval of the primary and secondary reflected waves on the bottom surface of the workpiece with a known thickness; The resonance method is that when the thickness of the workpiece is one-half or an integer multiple of the wavelength of the ultrasonic wave propagating in it, the incident wave and the reflected wave form a standing wave in the workpiece to generate resonance; according to the resonance frequency, resonance times, workpiece thickness and ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the present invention provides an ultrasonic probe device and a method for measuring the sound velocity of the workpiece to solve the technical problem in the prior art that the sound velocity of the workpiece material cannot be measured when the thickness of the workpiece is unknown

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