SUI Xiu-wu1, XIE Wang1, FAN Yu-ming2, et al. Finite element calculation and error analysis on capacitance liquid level sensor[J]. 2008, (6): 53-55+58. DOI: 10.13873/j.1000-97872008.06.028.
The math model of the double cylinders capacitance liquid level sensor is set up by the finite element method.The relation between the capacitance and its size
the relative permittivity
located pins and liquid level is presented.The result error caused by the parallelism
concentricity and the circuit is analysed.Calibration experiment shows