FLOOD DETECTION WIRELESS SENSOR AND SYSTEM USING THE SENSOR DURING FLASH FLOOD

摘要

A wireless sensing apparatus, and a flooding sensing system using the wireless sensing device are provided to dispose a plurality of RF sensor nodes having a multi-frequency hopping function in a region where flooding is worried to collect flooding information through the network of an auto ad-hoc routing scheme, thereby collecting the flooding information of the region more exactly and quickly. A support provides magnetic force to RF(Radio Frequency) sensors(101,102,103,104) while physically supporting RF sensors. Each of RF sensors comprises a magnetic sensor, an acceleration sensor, a wireless communications unit, and a controller. The magnetic sensor senses the magnetic force to sense whether there is secession from the support, and generates an escape signal when the secession occurs. The acceleration sensor senses the change of speed of the RF sensor. The wireless communications unit secession transmits and receives information and velocity information wirelessly. The controller supplies power to the acceleration sensor and the wireless communications unit by operating in a normal mode when the secession signal is received from the magnetic sensor, and collects the secession information and the velocity information to transmit the collected information by wireless through the wireless communications unit. In case of being positioned on support, the RF sensor operates in a sleep mode sensing only the secession from support. In case of being separated from the support, the RF sensor is converted to the normal mode.