一种重力敏感器阻尼系数测试方法  

A method for measuring damping coefficient of gravity sensor

作　　者：贾立民[1] 吴畏[1] 褚宁[1] 裴闯[1] 

机构地区：[1]天津航海仪器研究所,天津300131

出　　处：《传感器与微系统》2015年第12期134-137,共4页Transducer and Microsystem Technologies

基　　金：国防重点预研资助项目(51309040701)

摘　　要：当重力敏感器内部充满阻尼液时,其表体内弹性系统的阻尼系数由阻尼液粘度和敏感器内部结构共同决定。提出了一种实际测量重力敏感器阻尼系数的测试方法。分析了重力敏感器的阻尼系数和内部结构的关系,给出了敏感器工作原理模型,推导出敏感质量振幅的函数关系式。通过在力矩线圈上施加不同频率、不同幅值的激励源信号并测试敏感质量振幅的方式,绘制出不同阻尼系数下敏感质量的振幅—频率关系曲线,将之与理论函数曲线对照来确定相应的阻尼系数值。试验结果表明:该阻尼系数测试方法能够有效地测试出充满不同粘度阻尼液的重量敏感器的阻尼系数,为阻尼液粘度的选取和控制回路的设计提供参考。Damping coefficient of gravity sensor full of damping liquid is affected by two factors, which are viscosity of, damping liquid land inner structure of sensor. A method for measuring damping coefficient is studied. Relationship between damping coefficient and inner structure of sensor is analyzed, working principle model for sensor is given, function relational expression for amplitude of mass of sensor is deducted. Several curves of amplitude-frequency with different damping coefficients are plotted by experiments, which are applying different external source signals on torque coil and measuring the amplitude signals of mass of sensor. So value of damping coefficient is obtained by comparing the experimental curves with theoretical curves. Test results show that this method can effectively measure damping coefficient of gravity sensor full of different damping liquid, and that provide references for choosing viscosity of damping liquid and designing control circuit.

关 键 词：重力敏感器 阻尼系数 振幅 频率 测试 

分 类 号：U666.1[交通运输工程—船舶及航道工程]