THERMOSTAT OF HIGH PRECISION GRAVITY METER
Wu Yanxia 1,2,3) ;Hu Guoqing 2) ;Jiang Youhua 2) ;Zhang Daozhong 2) ; and Zhu Xiaoping 2)
1)Institute of Geodesy and Geophysics, CAS, Wuhan 4300772)Institute of Seismology, CEA, Wuhan 4300713)Crustal Movement Laboratory,Wuhan 430071
Abstract 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, preamplifier of low drift and high input impedance and ratiointegrating 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 0.000 1℃, its month drift is less than 0.000 1℃.
Key words ：
high precision gravity meter
thermostat
heating structure design
temperature control accuracy
automatic control principle
Received: 01 January 1900
Corresponding Authors:
Wu Yanxia
Cite this article:
Wu Yanxia,Hu Guoqing ,Jiang Youhua et al. THERMOSTAT OF HIGH PRECISION GRAVITY METER[J]. , 2008, 28(5): 133-135.
Wu Yanxia,Hu Guoqing ,Jiang Youhua et al. THERMOSTAT OF HIGH PRECISION GRAVITY METER[J]. jgg, 2008, 28(5): 133-135.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2008/V28/I5/133
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