碩士 / 國立成功大學 / 系統及船舶機電工程學系碩博士班 / 98 / Low-Frequency-Hydrophone (below 200 kHz) is widely used. In underwater acoustics researching, it can be applied to underwater communications, underwater acoustic positioning system and underwater geological surveying system, etc. Mastering hydrophone technology and capability of independent developing is an important key point on underwater acoustics research and other related research and application. Commercially available hydrophone is not only more expensive in price, but also function is not customized, bulky and not easy to integrate with other measurement tools.
This study is to develop an economical, small size hydrophone with high sensitivity for underwater application. The PZT ceramic piezoelectric material is used throughout the research for sensing and actuating purposes. An aluminum waterproof housing is also designed for underwater testing of the hydrophone. Characteristic comparison with the commercial type hydrophone is also provided.
While performing the system test, sound source is provided by the commercially available transducer. The sensitivity of the proposed hydrophone is calculated based on the comparison calibration method with a B＆K 8104 hydrophone. In addition, a small size amplifier is also embedded inside the waterproof housing to improve its sensitivity. Directional character of the hydrophone is also provided.
Finally, the proposed hydrophone is integrated with the LM1812 ultrasound driven circuit, and a complete small size sonar system is thus built. This work can be used in the development of underwater autonomous vehicle as a collision avoiding system, and it possibly provides the basic of an underwater communication system.
| Identifer | oai:union.ndltd.org:TW/098NCKU5345016 |
| Date | January 2010 |
| Creators | Che-WeiChuang, 張哲維 |
| Contributors | Ru-Min Chao, 趙儒民 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 79 |
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