Automatic calibration device and automatic calibration method for ultrasonic probe

Abstract

The invention relates to a calibration device and an automatic calibration method. According to the technical scheme, the automatic calibration device for an ultrasonic probe comprises a test block for calibrating the ultrasonic probe; the device is characterized in that an ultrasonic wafer array is mounted on the arc surface of the right side of the test block; the ultrasonic wafer array is covered with a resistive film, and the resistive film is connected with an external ultrasonic flaw detector through a wire so as to output a measuring point position signal; due to the fact that ultrasonic waves are a beam of sound waves, the maximum sound wave receiving position in the wafer array is taken as a feedback signal, and the K value of the probe can be calculated according to the positionsignal; the upper surface of the test block is provided with a front edge measuring assembly for measuring the length of the front edge of the probe; and the front edge measuring assembly is also communicated with an external ultrasonic flaw detector through a wire to output distance measurement data. According to the calibration device and the automatic calibration method, various ultrasonic angle probes can be automatically calibrated, and a flaw detection curve is automatically generated, so the workload of inspection personnel is reduced, and the efficiency is improved.

Description

technical field [0001] The invention relates to a calibration device and an automatic calibration method, in particular to an instrument and a method for automatically measuring the frontal length and K value of an ultrasonic probe. Background technique [0002] During ultrasonic flaw detection, the length of the front of the probe (the distance from the incident point of the ultrasonic beam to the front end of the probe) and the K value (the tangent of the refraction angle of the ultrasonic waves emitted by the ultrasonic oblique probe in the material) are important parameters of the probe, which affect the welding seam. An important factor in defect localization. Therefore, each time ultrasonic testing is performed, the frontal length and K value of the probe must be accurately measured (ie, calibrated). [0003] When calibrating the probe manually, the selected probe should be electrically connected with the ultrasonic flaw detector (hereinafter referred to as the flaw d...

AI Technical Summary

Problems solved by technology

[0004] Ultrasonic flaw detection needs to make a flaw detection curve for ultrasonic flaw detection after measuring the front length and K value of the probe. The whole process takes a long time and the work efficiency is not high.

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