Abstract
Based on the analysis of the main methods of non-metallic thickness measurement, a non-metallic thickness measurement method based on capacitive sensor is proposed. This paper analyzes the basic principle of capacitance sensor, uses Schmidt multivibrator for capacitance frequency conversion, and how to use high-performance 32-bit microcontroller for accurate frequency measurement. Through the experiment of measuring the number of 1-40 sheets of A4 paper, the results show that the non-metallic thickness measurement method described in this paper is simple in principle, high in accuracy and easy to realize.
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