基于矢量传感器的地下振动信号检测技术

Detection Technique of Underground Vibration Signals based on Vector Sensor

研究了地下振动信号的产生和振动机制,设计了地下振动信号检测系统试验方案。对利用矢量传感器采集到的信号进行处理,研究了地下振动信号的功率谱分布,综合利用信号去趋势、经验模态分解、小波去噪三种去噪方法,消除了混叠于振动信号中的噪声。通过对实测数据的处理,得到在0°到90°间,系统对目标的定向结果和来波方向的误差除了0°和90°以外,均小于10°,验证了矢量传感器有较好的定向能力。为下一步继续研究提供了技术支撑,且对矢量传感器在地下振动信号检测领域的工程化应用奠定了基础。

Underground vibration signal is one of the important basis for underground detection. This paper studied the generation and vibration mechanism of underground vibration signal, designed the test scheme of the underground vibration signal detection system. The signal collected by vector sensor is processed, then studied the power spectrum distribution of underground vibration signal. Three denoising methods, including signal detrended, empirical mode decomposition and wavelet denoising, are used to eliminate the noise mixed in vibration signal. Through processing the measured data, we get the error between the directional results and the direction of arrival of the system. It provides a technical support for further research, and lays a foundation for the engineering application of vector sensors in the field of underground vibration signal detection.