Ultrasonic testing device and method for curved surface weldment

Abstract

The invention relates to an ultrasonic detecting device and method for a curved weldment, and belongs to the ultrasonic testing field. An ultrasonic probe of the detecting device is connected to an ultrasonic detecting module, and the ultrasonic detecting module is connected to an industrial computer through a PCI bus; an ultrasonic probe support is connected with the ultrasonic probe, so that theultrasonic probe can carry out follow-up detection on the weldment in the space; a laser ranging sensor and a tilt sensor on the ultrasonic probe support convert optical path change and angle changeinto electrical signals and feedback to a data acquisition card built into the industrial computer; and the industrial computer integrates and analyzes ultrasonic signal data of all scanning positions, so that a detection result of the internal weld state of a workpiece is graphically realized. The detecting method comprises the steps of workpiece surface treatment, initial position selection of ascanning mechanism, parameter reading and workpiece surface scanning. The problem that the ultrasonic probe driven by a common mechanical device cannot realize the quantitative detection of complex random weldments and large-sized weldments is solved.

Description

technical field [0001] The invention relates to the field of ultrasonic testing, in particular to an ultrasonic testing device and method for a curved surface weldment, which is an ultrasonic testing method for positioning a curved surface weldment based on laser ranging and inclination measurement. Background technique [0002] Ultrasonic testing is a relatively common non-destructive testing method in the industry at present, and its testing methods are generally divided into qualitative testing and quantitative testing. [0003] Quantitative ultrasonic testing mostly uses a mechanical mechanism to drive the ultrasonic probe. Through the control of the mechanical mechanism, the ultrasonic probe is moved to the position to be detected, and the position information of the stepping motor fed back by each detection point and the ultrasonic information of the ultrasonic probe are obtained. The internal state of the workpiece at the position corresponding to the ultrasonic probe...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide an ultrasonic testing device and method for curved surface weldments, which solves the problem that it is difficult to realize quantitative ultrasonic testing of complex curved surfaces or large-size curved surfaces during the detection of mechanically driven ultrasonic probes in the prior art, and solves the problem of machine-driven testing devices. Problems of high cost, complex structure, and application limitations, while numerically fitting the internal state of the workpiece into graphical feedback

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