Impedance Ice Sensor Capable of Self-Componsating Temperature Drift

In order to further support the development of arrayed impedance-based icing detection technology, a temperature drift self-compensation method that does not depend on traditional temperature sensors is proposed for the ice thickness measurement error problem caused by temperature variation. The method achieves compensation by establishing a mapping relationship between relaxation time and temperature to calculate the temperature of the ice layer. A theoretical model to describe the temperature drift characteristics of complex dielectric constant based on the relaxation polarization principle is established, and the ice layer temperature calculation method is proposed on the basis of complex impedance measurement. The experimental results show that the method reduces the error of ice thickness measurement, and the root mean square error reaches 0.09 mm in ice cases below 4 mm, which is clearly better than the uncompensated results.