NON-CONTACT NOISE ATTENUATION WATER FLOW SYSTEM AND METHOD FOR DETECTING WASHING COMPLIANCE

摘要

A low cost solution for detecting the flow of water in a sink using a non-contact vibration sensor coupled with a computer vision system and a passive switched RFID tag that becomes active upon detection of water flow. In some embodiments, the water flow forms an active antennae system for the RFID tag. The sensor comprises a piezo electric film attached at the underside of a water receptacle, for example, a sink so as to collect the sound generated by water splashing or hitting the sink and a vision system using active detection techniques.

主权项

1. A liquid flow system for monitoring washing compliance comprising:
a sensor disposed near or on a liquid dispenser to generate a vibration signal; a modulator to modulate said vibration signal by amplification; a comparator to determine if the modulated signal exceeds a threshold value, wherein the threshold value identifies liquid flow through an output voltage; and a relay that is actuated using the output voltage.