Accuracy analysis of an ultrasonic sensor over an open channel rectangular notch for rainwater harvesting

Rainwater gathering could be a Technology Administration used for twenty-four collection and storing fresh water any more rooftops, the half of land surface or rock catchments exploitation easy techniques like jars and pots moreover as additional complicated techniques like underground check dams. The conventional analytical method of measuring flow rate are through weir/nothes and flow hall effect sensors, in this paper we analysed the flowrate data of a open channel rain water. The measurement of flow rate of a notch/weir is a laborious task, which involves the continuous mathematical analysis. Still there is a scope of occurring error while calculating the coefficient of discharges and volumetric equations. In this present study an ultrasonic sensor is integrated to an Arduino, which is taking the real time input signal from sensor and estimating the flow, based on notch equation and prior calibrated optimized coefficient of discharge (Cd). It is possible to estimate up to 450 cm height of water column of a notch with high precision of 2mm. By using Arduino it is possible to reduce the competency time of calculation of flow rate and the iteration process is looped easily with Arduino coding. The proposed system is cost effective and highly accurate with an accuracy range of 96 – 98 %can be widely used for rain water harvesting.