垂直摆倾斜仪的电路仿真及线性分析  

Circuit Simulation and Linear Analysis of Vertical Pendulum Tiltmeter

作　　者：李婷婷 邹彤[1,2,3] 马武刚 LI Ting-ting;ZOU Tong;MA Wu-gang(Institute of Seismology,CEA;Key Laboratory of Earthquake Geodesy,CEA;Hubei Earthquake Agency,Wuhan 430071,China)

机构地区：[1]中国地震局地震研究所 [2]中国地震局地震大地测量重点实验室 [3]湖北省地震局,湖北武汉430071

出　　处：《软件导刊》2022年第5期105-109,共5页Software Guide

基　　金：湖北省自然科学基金项目(S7105)。

摘　　要：在地震预测领域,地形变观测是一个重要的研究方向。地倾斜属于地形变的一种,倾斜仪用于观测地倾斜量,因此倾斜仪的输出数据对地震前兆预测有着一定指导意义。为更好地分析垂直摆倾斜仪的电路特性以及测试电路输出的线性度,利用Multisim对垂直摆倾斜仪电路进行仿真,通过设置不同摆倾角对应的电容量得到对应的电压数据。仿真结果表明,电路输出电压幅值随着摆体倾角的变化而变化,且输出电压的正负能够反映出摆的正偏与反偏,与仪器实际电路情况保持一致;利用最小二乘法拟合出输出电压的直线方程,通过计算得到输出电压的线性度小于0.4%,验证了垂直摆倾斜仪在其量程范围内的输出与输入存在良好的线性关系。In the field of earthquake prediction,topographic deformation observation is an important research direction.Ground tilt is a kind of topographical change,so the tiltmeter used to measure the amount of ground tilt has a certain guiding significance for the prediction of earthquake precursors.In order to better analyze the characteristics of the vertical pendulum tiltmeter circuit and the linearity of the test circuit output,this article uses Multisim to simulate the vertical pendulum tiltmeter circuit,and obtain the corresponding voltage data by setting the capacitance corresponding to different pendulum tilt angles.The simulation results show that the amplitude of the output voltage of the circuit changes with the tilt angle of the pendulum,and the positive and negative output voltage can reflect the forward and reverse bias of the pendulum,which is consistent with the actual circuit of the instrument;the least squares method is used to fit The linear equation of the output voltage is calculated,and the linearity of the output voltage is less than 0.4%through calculation,which verifies that the output and input of the vertical pendulum tiltmeter have a good linear relationship within its range.

关 键 词：垂直摆倾斜仪 差动电容位移传感器 电路仿真 MULTISIM 线性度 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]