Electronic circuit for high frequency and broad-band ultrasonic pulse-echo operation |
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| Institution: | 1. UTM Centre for Industrial and Applied Mathematics, Ibnu Sina Institute for Scientific & Industrial Research, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia;2. Department of Mathematical Sciences, Faculty of Science, Universiti Teknologi Malaysia, 81310 Johor Bahru, Johor, Malaysia;3. Kuwait College of Science and Technology, Doha Area, 7th Ring Road, P.O. Box No. 27235, Safat 13133, Kuwait;4. Department of Naval Architecture & Ocean Engineering, Inha University, 100 Inharo, Nam-gu Incheon 22212, South Korea;5. Department of Electrical and Computer Engineering, Pusan National University, San 30, Jangjeong-Dong, Gumjeong-Ku, Busan 609 735, South Korea;1. Drilling & Production Technology Research Institute, CNPC Chuanqing Drilling Engineering Company Limited, Guanghan, Sichuan, 618300, PR China;2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing, 102249, PR China;3. Mechanical Engineering College, Xi''an Shiyou University, Xi''an, Shanxi, 710065, PR China |
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| Abstract: | A new concept in broad-band ultrasonic flaw detectors is presented, based on a principle which uses only a single fast voltage drop instead of a pulse-like excitation as the driving voltage. This enables unipolar pressure pulses to be generated with acoustically well-matched transducers. The basic electronic circuit essentially consists of Power-MOS-FETs with a fast switching time. With the circuit as described below and a borad-band PVDF transducer, a pulse duration of ultrasonic signals in water shorter than 50 ns is obtained. |
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