一种用于管道地面标记的MEMS仿生矢量声传感器

New MEMS Bionic Acoustic Vector Sensor Used in Above-ground Marker of Pipeline

随着管道越埋越深,基于声检测原理的地面标记是现今管道技术的发展趋势。针对目前对管道内检测器标记难的现状,首次提出一种高灵敏度、高信噪比、高分辨率的新型MEMS仿生矢量声传感器运用到地面标记系统中。该文将该传感器与目前广泛应用在地面标记系统中的压电陶瓷振动传感器和动圈式高灵敏度地震检波器进行了不同的模拟对比实验。实验结果表明,MEMS仿生矢量声传感器具有检测距离长,可靠性能好,对土壤环境要求低等优点,从而验证了MEMS仿生矢量声传感器检测微弱信号的可行性和其在标记定位管道内检测器方向的良好的应用前景。

As the increasing depth of the pipeline, the above-ground marker system based on sound detection principle becomes the trend of pipeline technology. A new MEMS bionic acoustic vector sensor which has advantages of high sensitivity, high signal-to-noise ratio and high resolution has been put forward to use in the above-ground marker systems. Different simulated comparing experiments have been done among the new type sensor, vibration sensor of piezoelectric ceramic and high sensitivity moving-coil geo-phone. The results show that MEMS bionic acoustic vector sensor has advantages of long detection distance, high reliability and low requirement of soil environment and so on. Thus the feasibility of MEMS bionic vector sensor in measurement on weak signal direction and its good prospects in location internal inspector can be verified.