Mr. Rongting Zhao Profile

Rongting Zhao

at Beijing Great Wall Metrology and Testing Technology Research Institute

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Proceedings Article | 8 July 2022 Paper

Research on positioning and control method of high-precision lifting platform

Rongting Zhao, Ting Gao, Lei Qiao

Proceedings Volume 12282, 122821I (2022) https://doi.org/10.1117/12.2617428

KEYWORDS: Calibration, Data acquisition, Control systems, Servomechanisms

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As a high-precision liquid level measuring device, magnetostrictive liquid level gauge needs to ensure the reliability and accuracy of its calibration. In this paper, a precise measurement platform of liquid level gauge with precision grating ruler as measurement standard is designed. The device uses servo motor to drive the workbench to move along the vertical axis. The actual displacement value of the workbench and the output value of the liquid level gauge are analyzed and processed by computer to realize the calibration of the liquid level gauge. By analyzing the error source of the device, the measurement uncertainty of the device is determined. Based on the principle of inverse compensation method, the systematic error is separated from the error curve and superimposed with its inverse curve to eliminate the influence of systematic error. After compensation, the positioning error increases from 52 μ M improved to 6 μ m。 Theoretical analysis and experimental results show that the designed device can meet the calibration requirements of 0-2m float level gauge.

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