| 摘要 |
PROBLEM TO BE SOLVED: To provide a erosion measuring device in which effluence of a sensor occurs in a nearly natural state, without spoiling the actual erosion shape. SOLUTION: The erosion measuring device comprises a plurality of sensors 11, 12 including a triggering means informing the effluence, when the sensor effluence is occurred from a location of laying under ground by erosion action due to flowing water, a measuring means 21 which sorts the existence of the effluence of the sensor and the effluent sensors collaborating with the triggering means, a communication means 22 which transmits the sorted result through this measuring means by using a low frequency magnetic field, a receiving device 30 which receives the sorting result and is installed at a place different from the location of laying underground. Especially, either the size of the sensor or specific weight is set as the value to be carried out for the to be close to natural state. COPYRIGHT: (C)2007,JPO&INPIT |
