| 次声监测系统设计和次声传感器相位校准技术研究 |
| Design of Infrasound Monitor System and Phase Calibration of Infrasonic Transducers |
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| 中文摘要: |
| 研究建立了次声监测节点和不同孔径的次声监测阵列，设计了消除风噪的花瓣式空间滤波器并实验验证了其降噪效果，建立了基于互联网数据库管理的次声实时监测系统，提出了基于改进STA/LTA算法的前兆次声信号提取方法和基于能量曲线与皮尔逊相关系数的前兆次声事件确认方法，使用改进的加权时延最小方差法对监测到的次声信号进行了声源定位，验证了定位的准确性；研究了次声传感器的相位校准技术，建立了试验样机，比较了试验结果和理论结果偏差，验证了次声相位校准的可行性。 |
| 英文摘要: |
| In this article, infrasound monitor nodes and array in different dimension are built, rosette space filter for reducing wind noise is designed, experiment shows results of noise reduction, monitor system for data management based on internet is found, method for abnormal infrasound abstracting based on improved STA/LTA algorithm and confirmation method based on energy curve and Pearson correlation coefficient are presented, sound source position are estimated by modified weighting minimum delay variance method using monitor data, accuracy is identified by result. Phase calibration of infrasound transducer is studied, prototype is built, relative error between experiment and theory is compared, and feasibility is validated. |
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| 中文关键词: 次声监测 系统设计 相位 校准 |
| 英文关键词:Infrasound Monitor System Design Phase Calibration |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2016.05.03 |
| 引用本文：张炳毅,黄日恒,杨军,徐佳.次声监测系统设计和次声传感器相位校准技术研究[J].计测技术,2016,36(5):. |
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