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Vol. 175, Issue 7, July 2014, pp. 268-272

 

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Research on Digital Testing System of Evaluating Characteristics for Ultrasonic Transducer
 

Qin Yin, * Liang Heng, Peng-Fei Zhang, Guo-Fu Yin

School of Manufacturing Science and Engineering, Sichuan University, Chengdu, 610065, China
* Tel.: 028-85405303, fax: 028-85460689

* E-mail: ria2000@sina.com

 

Received: 10 July 2014 /Accepted: 28 July 2014 /Published: 31 July 2014

Digital Sensors and Sensor Sysstems

 

Abstract: 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.

 

Keywords: Ultrasonic transducer, Ultrasonic test, Frequency characteristic, Time domain response, Sound field characteristic.

 

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