传感技术学报2025，Vol.38Issue(3)：377-386,10.DOI:10.3969/j.issn.1004-1699.2025.03.001
用于岩土体运动测量的低频声波传感器的研制
Development of Low Frequency Acoustic Sensor for Rock and Soil Mass Motion Measurement
摘要
Abstract
In order to realize the monitoring of infrasound produced by rock and soil mass movement in the process of geological disaster evolution of landslide and debris flow,a capacitive infrasound sensor with wide band and high sensitivity is designed.The infrasonic sen-sor has several excellent characteristics.With wide frequency band,it can detect sound waves in the range of 0.1 Hz-100 Hz,which covers most infrasound frequency bands and part of audible frequency bands produced by geological disasters of debris flow and land-slide.A combination of acoustic filter and filter circuit is used to suppress signals,interference and noise outside the monitoring frequen-cy band.It has good frequency response,within the design frequency range,the response is straight.It also has wide dynamic range,the loudest pressure level can reach 117 dB.Its sensitivity is high,up to 15 mV/Pa.By using a small mass of 6μm thick diaphragm,it can be insensitive to vibration.Its size is small,making it easy to carry.The container for the backing volume is wrapped with 5 mm thick thermal insulation cotton for thermal insulation,which can achieve continuous and stable work.关键词
电容传感器/宽频带/高灵敏度/地质灾害/次声波监测Key words
capacitive sensor/wide band/high sensitivity/geological disaster/infrasonic monitoring分类
信息技术与安全科学引用本文复制引用
刘炳杰,吴秀山,张宪阳,方元丰,葛仁望,李青..用于岩土体运动测量的低频声波传感器的研制[J].传感技术学报,2025,38(3):377-386,10.基金项目
国家重点研发计划课题项目(2022YFC3003403) （2022YFC3003403）
浙江省重点研发计划项目(2018C03040) （2018C03040）
