本实用新型涉及测量仪器领域；具体地说是自动安平激光产品中的电子水泡。
The utility model relates to the measuring instrument field, in particular to an electronic bubble of an automatic leveling laser product.
利用物理摆原理导出了自动安平水准仪磁致误差的理论函数模型，建立了地磁场中的观测方程。
Based on the theory of horizontal pendulum, the theoretical function model of magnetic error of self adjusting level is deriveted, and observation equation in geomagnetic field is set up.
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