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一、引言高精度水准测量是研究地壳垂直形变的主要手段。它可以用于地面沉降研究,大坝变形测量及在地震预报工作中重要参数的测量。但是以往水准测量只能通过人工操作,测量速度慢,前后视距短,劳动强度大,测量精度和稳定性差。由于激光具有单色性好,能量高度集中,射束狭窄这些优点,它给高精度水准测量带来了新的前景。
I. INTRODUCTION High-precision leveling is the main method to study vertical crustal deformation. It can be used for ground subsidence research, dam deformation measurement and measurement of important parameters in earthquake prediction work. However, in the past, the level measurement can only be performed manually, the measurement speed is slow, the line-of-sight distance is short, the labor intensity is large, and the measurement accuracy and stability are poor. Because of its advantages of good monochromaticity, high energy concentration and narrow beam, laser has brought new prospects for high-precision level measurement.