This new calibration device reduces measurement uncertainty in hydrostatic leveling, indicating enhanced accuracy. The design incorporates liquid-level rise and fall methods for effective calibration.
In view of the current situation that it is difficult to achieve high-precision calibration for the widely used hydrostatic leveling in engineering construction and structural monitoring, a calibration method by controlling the liquid-level rise and fall is proposed. Firstly, a calibration device for hydrostatic leveling composed of a vertical displacement stage, a micrometer resolution grating ruler, etc. is developed. Secondly, the liquid-level monitoring and compensation method and system are analyzed and constructed. The high-precision calibration experiment of the differential pressure hydrostatic leveling is designed, and the uncertainty evaluation method for the calibration of the hydrostatic leveling is given. The experimental results show that within a 3 m range, the measurement uncertainty of the calibration device is U = 0.064 mm ( k = 2), providing a key calibration technology for the hydrostatic leveling to achieve high-precision measurement.
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Zeng et al. (2025) studied this question.
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