研究目的
Investigating the application of PMUT arrays in an underwater acoustic source localization system to determine the direction to a source with no theoretical limitation on the angular range.
研究成果
The AcouLoc system successfully demonstrated underwater source localization in laboratory conditions, showing potential for miniaturized, integrated platforms. The cross-correlation technique effectively estimated time delays for angle determination, with future work needed to adapt the system for longer distances by reducing the operational frequency.
研究不足
The frequency of operation (2 MHz) may require reduction for longer distance implementations due to attenuation. The system's angular range is theoretically unlimited but practically limited by the directivity of the beacon and receiver.
1：Experimental Design and Method Selection:
The system uses PMUT arrays to detect ultrasonic bursts from an acoustic beacon, employing a cross-correlation technique to estimate time of arrival differences.
2：Sample Selection and Data Sources:
A commercial PZT transducer serves as the acoustic beacon, with the PMUT receiver submerged in dielectric oil to simulate underwater conditions.
3：List of Experimental Equipment and Materials:
PMUT arrays, PZT transducer, dielectric oil tank, motorized stage, pulser board, oscilloscope.
4：Experimental Procedures and Operational Workflow:
The beacon's position is varied relative to the receiver, and the time delays between signals received by adjacent PMUT channels are measured.
5：Data Analysis Methods:
Cross-correlation technique is used to analyze the time delays between signals for angle determination.
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