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声学Fabry-Perot共振探测器用于被动声学温度计和声源定位
Yan Yue1,2, Zhifei Dong1,2, Zhi-Mei Qi1,2,3
1State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China.
Sensors (Basel, Switzerland)
|April 26, 2025
概括
研究人员开发了一种新的声学传感器阵列,用于同时测量声学温度和声源定位. 这种创新设备使用Fabry-Perot共振效应提高了麦克风的灵敏度,从而实现了准确的环境监控.
科学领域:
- 声学感应 声学感应 声学感应
- 传感器技术 传感器技术
- 信号处理 信号处理
背景情况:
- 声学温度测量 (ATM) 和声源定位 (SSL) 是声学传感器的关键应用.
- 开发用于ATM和SSL组合的新型传感器提供了一个创新的研究机会.
研究的目的:
- 设计,制造和验证一个声学Fabry-Perot共振探测器 (AFPRD) 和其用于被动ATM和主动SSL的阵列.
- 为了提高麦克风的灵敏度,并能够准确地确定环境参数.
主要方法:
- 设计了一个AFPRD,使用声波导和麦克风来利用法布里-佩罗的共振效应.
- 制造了一个十字形的AFPRD阵列,带有曲的声波导以扩大光圈.
- 采用多重信号分类 (MUSIC) 算法进行声源定位,并结合实时声速测量.
主要成果:
- AFPRD证明了被动ATM的准确度高达0.4°C,使用环境白噪声低至17dB.
- 在户外环境中,AFPRD阵列在35mPa的声学目标上以小于1.2°的误差实现了SSL.
- 模拟和实验验证证了开发系统的ATM和SSL功能.
结论:
- 开发的AFPRD及其阵列为多功能声学检测提供了一个新的解决方案.
- 这项技术为先进的声学传感设备和系统开辟了新的可能性.
- 这些发现突出了声学测量和定位的增强灵敏度和准确性的潜力.
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