Lab kit for liquid level measurement using valve opening with PID controller

Ahmed Abdulhameed Ebrahim, Yvette Shaan-Li Susiapan*

Abstract

Liquid monitoring and storage in tanks are major problem in many industries. Since this process required accuracy and controller to control the liquid level in coupled tanks. The main aim of this project is to develop a lab kit liquid level measurement using valve opening with PID controller. The PID controller in this paper will be examine in order to develop and build a coupled tank liquid level control system. This system method results, and simulation are obtained from the LABVIEW software. The LABVIEW simulation of the PID controller is done to observe the behavior and the performance of each of the PID parameters. The transfer function will be obtained by considering some factors. The graph simulation results for each PID parameter will be done to recognize the best values of the performance of the PID controller. Testing was done on the PID parameters where when the Kp tuned to 0.008 the rise time was 8.25 and the settling time 9.25. In addition, a servo motor will be utilized to control the valve position. An ultrasonic sensor will be utilized in this system to measure the level in the lower tank. The propose system interfaced LABVIEW with Arduino Uno to control the servo motor through LINX library in LABVIEW. The propose system observation done in different components. It was observed the servo motor maximum rotation was 175 degree. Other observation was in reading the water level where the minimum 3cm the ultrasonic can detect. The differences in terms of the system performance either with PID or without PID will be discussed.