title: New research on MEMS acoustic vector sensors used in pipeline ground markers.
abstract: According to the demands of current pipeline detection systems, the above-ground marker (AGM) system based on sound detection principle has been a major development trend in pipeline technology. A novel MEMS acoustic vector sensor for AGM systems which has advantages of high sensitivity, high signal-to-noise ratio (SNR), and good low frequency performance has been put forward. Firstly, it is presented that the frequency of the detected sound signal is concentrated in a lower frequency range, and the sound attenuation is relatively low in soil. Secondly, the MEMS acoustic vector sensor structure and basic principles are introduced. Finally, experimental tests are conducted and the results show that in the range of 0°~90°, when r = 5 m, the proposed MEMS acoustic vector sensor can effectively detect sound signals in soil. The measurement errors of all angles are less than 5°.
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China. sroc@163.com.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Song
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China. jianzemingx@163.com.
authors.forename: Zeming
authors.initials: Z
authors.lastname: Jian
authors.affiliation: Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China. zhangguojun1977@nuc.edu.cn.
authors.forename: Guojun
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Science and Technology on Electronic Test & Measurement Laboratory, North University of China, Taiyuan 030051, China. liumengran1991@163.com.
authors.forename: Mengran
authors.initials: M
authors.lastname: Liu
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China. guonan0902@163.com.
authors.forename: Nan
authors.initials: N
authors.lastname: Guo
authors.affiliation: Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China.
authors.forename: Wendong
authors.initials: W
authors.lastname: Zhang