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℃.
出处
《大地测量与地球动力学》
CSCD
北大核心
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)
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
high precision gravity meter
thermostat
heating structure design
temperature control accuracy
automatic control principle
