| Summary: | 博士 === 國立成功大學 === 航空太空工程學系碩博士班 === 96 === Shock wave therapy has applied by medical doctors on lithotripsy and orthopedics in replacing traditional surgery. For generating shock waves, a high-voltage system of electrical mechanism is necessary to provide, and is designed with some features in this study. Moreover, electrohydraulic extracorporeal shock wave generators have been constructed and fabricated for the purpose of lithotripy or orthopedics. The designed shock wave generator consisted of several subsystems. They were a shockwave reflector, a spark gap, an electromagnetic valve-assisted water filling/draining system, and a laser-assisted positioning system. The details of materials and design methods used have been described. The high-voltage system can be applied to other types of shock wave generators such as an electromagnetic type. The control procedures for whole shock wave therapy machine have been explained as flow charts. The schematic diagrams of all designed circuits and dimensions have also been illustrated. Each single control procedure of the high-voltage system has been validated by a time sequence and profiles of signals captured from an oscilloscope. It is noted that electromagnetic interferences associated with the high-voltage system have been reduced by 99%. Moreover, the key mechanical and electrical properties of our designed shock wave generator have been measured and discussed. Finally, the acoustic field, peak positive pressure, peak negative pressure, and shock wave intensity have been measured by using a pressure sensor of PVDF and PCB hydrophone.
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