Rain Drop Counting Measurement Sensor with Energy Harvesting Technology of Water Motion

The damage caused by localized heavy rains has been increasing in recent years, but it is difficult to find ways to protect people and property through existing rainfall measuring devices. This study applied energy harvesting technology through water movement as a sensor technology to monitor instantaneous water bombing phenomenon such as guerrilla storm concentrated in a small area. Water motion active transducer (WMAT) is an energy harvesting device that uses an electric double layer formed when water and a specific polymer are in contact with each other. Transient electron transfer between electrodes formed under the polymer is a main cause of AC peak formation. Measuring the AC peak formed when a raindrop drops onto the surface of the sensor can be used to measure the number of raindrop drops per second.