摘要
拉考斯特 -罗姆贝格 G型重力仪 (即 L CR- G)是高精度重力仪 ,已经在我国地震、大地测量、勘探等领域广泛使用 ,但对其性能的研究以往只是在实验室状态下 ,人为设置多种干扰因素 ,做了一些实验工作。这种实验工作时间段是短暂的 ,有一定程度的局限性 ,而对其长期性能变化的研究 ,鉴于各种原因 ,迄今为止 ,国内外尚未见到此类文献发表。本文根据地震系统重力外业定点复测的特点 ,用实测所得资料对 LCR- G仪器长期动态性能做探讨性研究 :认为仪器弹簧的一次及二次老化效应、季节性外温变化的叠加影响是产生仪器漂移的主要原因。其中一次老化效应是决定仪器漂移形态的主导因素 ,具有单一性。二次老化效应具有共性 ,季节性温度变化影响具有周期性特点。
LCR-G Gravimeter,Which is widely used in the field of geodetic survey and seismic prospecting,is a kind of high precision gravimeter.We usually do experiment with some arbitrary disturbs in laboratory to test its funciton.Since the test time is short,this kind experiment has its limitation in long term function study.Thus,no papers on this problem have been published till present. Based on the character of field fixing site resurvey for gravity,we studied the longterm dynamic function for LCR-G gravimeter with observed data.The conclusion is the combining effect of the first and second aging for spring of the gravimeter with the variation of temperature in season is the main reason for the drift of the instrument.The first aging,which is unitary,is the dominant factor.The second aging has commonness.The temperature variation with season has periodical feature.
出处
《华北地震科学》
2000年第4期26-35,共10页
North China Earthquake Sciences
