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重力仪的亮线灵敏度反映了弹性系统对重力变化的灵敏程度,它是通过亮钱(指示丝)在目镜视场中移动的情况表现出来。因此,灵敏度太高或太低都会产生较大的读数误差。由于温度的变化以及仪器长期零漂、测程范围的调节,甚至气泡标准位置、光系元件位置的变动,均可引起亮线灵敏度发生改变,所以必须经常检验与调整灵敏度。鉴于过去一些仪器说明书和讲义中,对调整亮线灵敏度的具体方法阐述的不够明确和完整,没有把倾斜仪器、改变零位、摆杆水平、校正气泡等方面有机地结合起来,致使很多观测员感到调整亮线灵敏度很困难。另外,国产 ZS 型重力仪目镜刻度片分划线的间隔是一大格,达不到按 CG—2说明书中介绍的判断调整零位方向的要求。本文通过对调整过程中摆系状态的分析,探索一种调整石英弹簧重力仪亮线灵敏度的有效方法。
The bright line sensitivity of the gravimeter reflects the sensitivity of the elastic system to changes in gravity as demonstrated by the movement of light money (indicator wire) in the eyepiece field of view. Therefore, the sensitivity is too high or too low will have a larger reading error. As the temperature changes and long-term zero drift instrument, measuring the range of adjustment, and even the standard position of the bubble, the location of optical components, can cause changes in bright line sensitivity, it must always test and adjust the sensitivity. In view of past instrument manuals and handouts, the specific methods for adjusting the sensitivities of bright lines are not sufficiently clear and complete, and there is no organic combination of tilting instruments, zero changes, pendulum levels, calibration bubbles, etc., and many observers Feel very difficult to adjust the bright line sensitivity. In addition, domestic ZS-type gravimeter eyepiece graduation score line spacing is a large grid, not up to CG-2 manual to determine the adjustment of zero direction requirements. In this paper, by analyzing the state of the pendulum in the adjustment process, an effective method to adjust the sensitivity of the bright line of the quartz spring gravimeter is explored.