Detection Of Dielectric Material Using Miniature Two-Plate Electrical Capacitance Sensor

Mohd Tah, Mohd Alif (2016) Detection Of Dielectric Material Using Miniature Two-Plate Electrical Capacitance Sensor. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Electrical Capacitance Sensor for detect the dielectric material is constructed and presented in this work. This project focuses on how to design and implement the system to detect the type of dielectric material using non – destructive of Electrical Capacitance test concept. The miniature two-plate of Electrical Capacitance Sensor (ECS) is designed by using Comsol Multiphysics Software to see the electric field and contour of electric potential of the system. The capacitance value from the sensor is measured based on AC Circuit concept. The alternating current from the sensor flows to the charge detector circuit providing the voltage corresponding to the capacitance between electrodes pair. The voltage from the charge detector circuit has been amplified by amplifier circuit before sending to the low - pass filter for rejecting unwanted signal of the fringe effect and to get the clean DC output from AC input signal. The voltage from filter circuit has been converted from the analog to digital signal using labVIEW interface software via the Arduino Uno module circuit. The labVIEW software is used as graphical user interface (GUI) to display the type of dielectric material or composite material of paper, plastic, FR4 Circuit Board respectively in the computer system.

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