基于频域反射法的平行螺旋线拉伸测量分析  

Analysis of Parallel Helix Tension Measurement Based on Frequency Domain Reflection Method

作　　者：李朝鹏 李青 陈华民[4] 徐夏捷 苗鑫雨 LI Chaopeng;LI Qing;CHEN Huamin;XU Xiajie;MIAO Xinyu(College of Mechanical and Electrical Engineering,China Jiliang University,Hangzhou Zhejiang 310018,China;National and Local Joint Engineering Research Center for Disaster Monitoring Technology and Instruments,China Jiliang University,Hangzhou Zhejiang 310018;Zhejiang Key Laboratory of Intelligent Manufacturing Quality Big Data Traceability and Application,China Jiliang University,Hangzhou Zhejiang 310018,China;Jinhua Geological Environment Monitoring Station,Jinhua Zhejiang 321000,China)

机构地区：[1]中国计量大学机电工程学院,浙江杭州310018 [2]中国计量大学灾害监测技术与仪器国家地方联合工程研究中心,浙江杭州310018 [3]中国计量大学浙江省智能制造质量大数据溯源与应用重点实验室,浙江杭州310018 [4]金华市地质环境监测站,浙江金华321000

出　　处：《传感技术学报》2024年第12期2177-2186,共10页Chinese Journal of Sensors and Actuators

基　　金：国家重点研发计划课题项目(2022YFC3003403);浙江省重点研发计划项目(2021C03016)。

摘　　要：在地质灾害监测中,分布式测量可以无遗漏地对岩土灾变进行测量。提出平行螺旋传输线作为传感器,并结合频域反射法(Frequency Domain Reflection,FDR),可以实现连续的大形变量的分布式测量。已知平行螺旋传输线的特性阻抗随着拉伸量的增加而发生变化,利用FDR可以对拉伸点进行测量和定位。详细阐述了频域反射法测量平行螺旋传输线拉伸形变的原理。还针对频域反射法在平行螺旋传输线实际应用过程中可能遇到的问题进行了分析,通过实验数据检测了扫频范围、频率大小、采样点个数等因素对测量结果的影响,并对可能影响测量结果的因素进行了实验分析,以便选择更好的测量方案。同时,利用频域反射法法模拟测量了平行螺旋传输线的实际使用场景,得到了实际测量数据,并对测量结果进行了分析。Distributed measurement of underground rock and soil deformation is an important part of geological hazard monitoring.By using parallel helical transmission lines as sensors and combining frequency domain reflection(FDR)analysis,continuous distributed measurement of larger deformation quantities is enabled.It is known that the characteristic impedance of the parallel helical transmission line increases with the increase of tensile force.Through FDR,the measurement and location of the tensile point can be de-termined.The principle of FDR measurement of tensile deformation in parallel helical transmission lines is explained.In response to practical application issues of FDR in parallel helical transmission lines,the influence of sweep range,frequency,and number of sam-pling points on measurement results is analyzed through experimental data.Different incident signals under different circumstances are also measured,factors that may affect measurement results are identified and analyzed,and a better measurement scheme is selected.The proposed method is used to simulate the actual use of parallel helical transmission lines and obtain actual measurement data,which is analyzed for better understanding.

关 键 词：地质灾害监测 频域反射法 分布式测量 平行螺旋传输线 阻抗变换 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]