高精度重力仪的恒温控制系统  

THERMOSTAT OF HIGH PRECISION GRAVITY METER

作　　者：吴艳霞[1,2,3] 胡国庆[2] 蒋幼华[2] 张道忠[2] 朱小平[2] 

机构地区：[1]中国科学院测量与地球物理研究所,武汉430077 [2]中国地震局地震研究所,武汉430071 [3]地壳运动与地球观测实验室,武汉430071

出　　处：《大地测量与地球动力学》2008年第5期133-135,共3页Journal of Geodesy and Geodynamics

基　　金：中国地震局地震研究所所长基金(IS200761364)

摘　　要：为降低温度效应对重力仪参数的影响,保证高精度重力仪的观测精度,研制了一种高精度的温度控制系统。该系统应用自动控制原理,对控温系统进行了精心设计,包括合理的热结构、低漂移和高输入阻抗的前置放大和恰当控制参数的比例积分放大器,并选用了性能稳定的热敏元件。经测试该系统的控温精度达到0.0001℃,月漂移小于0.0001℃。To reduce the influence of temperature on the parameter of gravity meter and insure the observation precision of the high precision gravity meter , a high precision thermostat is developed. On the basis of the automatic control principle, the temperature control system including rational heating structure, pre-amplifier of low drift and high input impedance and ratio-integrating amplifier of appropriate control parameter was designed meticalaly and stable temperature sensing elements were chosen as well. Through test, the temperature control accuracy of this apparatus is O. 000 1 ℃, its month drift is less than O. 000 1℃.

关 键 词：高精度重力仪 恒温控制系统 热结构设计 控温精度 自动控制原理 

分 类 号：TH762[机械工程—仪器科学与技术]