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众所周知,气压变化一直是重力仪的主要干扰因素之一。为减小其影响,或在仪器的摆体上加气压补偿装置,或将弹性系统密封。石英弹簧重力仪就是采用真空密封以减小外界温度、气压影响的。近几年国内外的试验证明,各种牌号的石英重力仪都不同程度地受到气压影响,但在实际工作中尚不能利用室内标定的气压系数对外业资料进行有效的改正。因此国家地震局重力清理攻关组决定将三台Worden(No.1224、1173、1148)、
It is well-known that pressure changes have always been one of the major disturbing factors in gravimeters. To reduce the effect, add an air pressure compensation device to the pendulum of the instrument or seal the flexible system. Quartz spring gravimeter is the use of vacuum sealed to reduce the outside temperature and pressure effects. In recent years, tests at home and abroad have proved that various grades of quartz gravimeters are affected by the pressure to varying degrees, but in actual work can not use the indoor calibration of the atmospheric pressure coefficient to effectively correct the external data. Therefore, the State Seismological Bureau gravity clearance research group decided to three Worden (No.1224,1173,1148),