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A prototype of a liquid level monitoring system based on float sensors, electromagnetic valve, Matlab and LabVIEW environment is developed for measuring liquid level accurately and accordingly maintaining the level of liquid close to the reference level. Using this approach the cheaper and more versatile measurement system can be developed. With virtual measurement technology, more of the instrument can be substituted by software. It made the product expensive, with low functionality and with limited precision. Most of the traditional measuring systems were designed and implemented by complicated hardware circuitry. Department Fr.C.R.I.T,Vashi, Navi Mumbai Maharashtra,IndiaĪbstract The purpose of study paper is to demonstrate an innovative approach for low cost continuous liquid level monitoring based on virtual instrumentation. Shamim S Pathan1 Bipin Mashilkar2 Mechanical Engg. Praseed Kumar Mechanical Engg Department Fr.C.R.I.T, Vashi Navi Mumbai However, due to the nonlinearity of the system, the PID coefficients need to be approximately adjusted in different coupling cases.Liquid Level Control using PID Controller Based on Labview & Matlab Software The results of experiment show that PID algorithm is well suited to stabilize the coupling system. Finally, experiments results are charted to prove the stability and robust coupling. And then, the PID control algorithm is discussed. In a second stage, the LabVIEW and Arduino based real time control system structure is introduced. The thesis first discusses the Whispering Gallery Mode microtoroid, especially its relative coupling regime. For this reason, the author decided to test further application, with the goal of proving the suitability for Whispering Gallery Mode coupling. PID algorithm has been used for stabilization and control in industry for several decades. But surrounding environments, like temperature and airflow, could easily influence coupling condition.

Efficient and robust coupling is prerequisite in microcavity related applications. The aim of this thesis is to test the implementation of PID control algorithm for stabilization of coupling.