CONTACT LESS RUNNING WATER FLOW DETECTION AND WATER FLOW MEASUREMENT SYSTEM

Abstract

Contactless running water detection and water flow measurement system detects whether water in the pipe is stationary or running. The main purpose of the system is to measure water flow without contact of water. The system is suitable for plastic and metal pipes. The low cost water flow detection system is most useful for domestic purpose. Piezoelectric vibration sensor is used as flow sensor for measurement purpose. It detects the flow induced vibration signal from flow of water in the pipe. It converts flow induced vibrations due to water flow inside the pipe into electrical signal. This weak electrical signal is filtered and amplified with the help of operational amplifier. Operational amplifier amplifies the signal and gives required output voltage level. Amplified signal is given to peak detector and Schmitt trigger. Peak detector detects the positive peak value of the voltage which is the proportional to the frequency. Schmitt trigger gives output in the form of pulsating DC voltage i.e. digital output. Digital output is given to the microcontroller. Microcontroller counts these pulses to determine flow rate. Microcontroller executes program to control all devices which is helpful for flow measurement. The microcontroller indicates water flow on the display. These type of system till now not available in the market