Method of Electric Capacity Measurement

The article presents the issues of determining the electrical capacity by indirect measurement method. The features of the capacitance sensors use are studied to measure various physical quantities, in particular linear displacement sensors, pressure sensors, level sensors, etc. Indirect methods of measuring electrical capacitance usually involve the use of different methods using: Resonant properties of the oscillating circuit, measurement of RC-generator, bridge methods. Due to identified disadvantages, in particular, the need for use and processing of high-frequency signals, the method for measuring the electric capacitance at a constant current has been chosen. The method of capacitance measuring according to transient characteristics is proposed. The possibility of using this method to measure the electrical capacitance of differential capacitors is considered separately. The described method can be used in development of devices designed to measure the electrical capacitance of capacitor sensors of various technological parameters. The data of simulation modeling of the developed method in MatLab Simulink is presented.