IoT based dielectric constant measurement system for solid or semi-liquid materials using Arduino WeMos D1R1

Abstract

The measurement-system mainly consists of sensing-element, signal conditioning circuit and signal-processing unit. The sensing-element of a measuring system is directly affected by materials carrying quantity to be measured. This system supports solid or semi-liquid material. This paper signifies the designed system for dielectric constant measurement using Arduino with Wi-Fi and capacitive sensing element which sends/shows information continuously on android app or cloud to build IoT based system.With the help of Polarization, Dielectric properties, Cole-Cole diagram, Microwave Measurement Methods and Arduino with IC-555, many techniques with limitations and complications are available to calculate dielectric constant. But this advanced system consists only Arduino without any other bulky circuit. In this system, measurement of dielectric constant depends on parameters of capacitive sensing element and property time constant of capacitor. Capacitor with larger capacitance takes more time to charge as well as discharge. The charging and discharging voltage of the capacitor is applied to Arduino (WeMos D1-R1) with signal conditioning. Here, from capacitance, dielectric constant of material is calculated and verified with standard values. WeMos D1-R1 Arduino has Wi-Fi facility to transmit data continuously on cloud. Designed system gives the capacitance, dielectric constant of substance, and displays it on android app and cloud or website with accuracy about approximately 99.46%.