Research on Digital Testing System of Evaluating Characteristics for Ultrasonic Transducer

Ultrasonic transducer is used to generate and receive ultrasonic wave. As an important part of the ultrasonic testing system, the performance of ultrasonic transducer is so important that determining whether the testing result is precise or not, so it is one of the key factors to ensure the quality of flaw detection. In view of the problems such as enormous equipment and complicated operation, low degree of digital exist in the present traditional ultrasonic transducer testing system, we established a set of digital ultrasonic transducer detecting system that can meets the practical requirements. Computer technology, automatic control technology and modern signal processing technology are applied in this system. Using the time-frequency analysis technology based on FFT, the testing method and module are built up to realize the measurement of time-frequency response parameters and sound field parameters. Through the Time-frequency characteristics and sound field characteristics testing of the commonly used typical transducer, and analyze the experimental data. The result confirms that the proposed method is validity and practicability