Digital Signal Analysis Method for Underwater Ultrasound
碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 103 === In the underwater signal-receiving device, the detection and analysis of the ultrasonic signals is a real-time task and all the misjudgments must be prevented. Therefore we need to design a stable and real-time system, which means the time complexity of th...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2014
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| Online Access: | http://ndltd.ncl.edu.tw/handle/38340332489732032161 |
| Summary: | 碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 103 === In the underwater signal-receiving device, the detection and analysis of the ultrasonic signals is a real-time task and all the misjudgments must be prevented. Therefore we need to design a stable and real-time system, which means the time complexity of the analyzing method should be simplify; thus, the power consumption can be reduced.
We simulate the underwater ultrasonic signals and its attenuation by SMBV signal-generating device, and receive digital signals from a microcontroller with a 14-bit analog-to-digital converter. The frequency-domain based and time-domain based signal analyzing method both managed to detect the energy of the 1MHz signal with high dynamic range, and the computing time is also well-controlled.
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