电磁超声扫描装置及其控制系统的设计

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Abstract The electromagnetic ultrasonic technology is a non-contact measurement, it could detect specimen at high temperature, high speed, surface roughness and other harsh conditions, without coupling medium or pretreating the specimen. The electromagnetic ultrasonic scanning device is designed in this paper. The probe can be moved in x, y direction with step-scan, while the height of the probe can be adjusted. Therefore, the scanning device could control the scanning trace of the probe. In order to track scanning aluminum plates quickly and accurately for scanning device, the stepper motor control system based on single chip microcomputer is designed, it could adjust the probe’s scanning speed and scanning direction in real-time. The probe could uniform scanning, and the ladder up speed method is used to precisely control the move distance, enabling the probe positioning.

Key words： Electromagnetic acoustic transducer scanning device stepper motor speed control stepper motor position control

Received: 10 September 2014 Published: 29 June 2015

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