CHARACTERISTICS MEASUREMENT OF PNEUMATIC ELEMENTS USING ISOTHERMAL CHAMBER

Abstract

We have proposed a simple method to measure the flow rate of compressible fluids using an isothermaichamber. An isothermal chamber is a chamber which the steel wool is stuffed and can almost, realize isothermal condition. Therefore, the instantaneous flow rate could be measured only from the pressure response using the stateequation of gas. In this study, we propose methods for the characteristics measurement of pneumatic elementsusing this chamber. Specifically, the method for the flow characteristic measurement of regulators and valves, and for the dynamic characteristic measurement of servo valves is proposed. We confirmed effectiveness a, ndsimplicity of the proposed method by comparing the measured results obtained by proposed methods with themethods defined in the JIS and the ISO standards.