METHOD, DEVICE, AND SYSTEM FOR DETECTING PRESSURE IN SPACE OF HOLE OR THE LIKE AND METHOD, DEVICE, AND SYSTEM FOR OBSERVING WATER LEVEL IN SPACE OF HOLE OR THE LIKE

摘要

PURPOSE: To surely detect a change in groundwater level by providing a pressure receiving plate in the space of a hole, etc., and detecting a pressure by means of a pressure-sensitive sensor mounted on the plate. ;CONSTITUTION: A pressure receiving plate 5 is set in the space of a hole, etc., for detection. A pressure sensitive sensor 12 is mounted on the plate 5 and the sensor 12 is electrically connected to a terminal block 6 which, in turn, is electrically connected to a sensor cable. The sensor 12 is incorporated in a Wheatstone bridge circuit. When such a constitution is used, a change in water level can be surely observed by receiving the pressure in the space of a hole, etc., with the pressure receiving plate 5 and detecting the pressure by means of the pressure-sensitive sensor 12 mounted on the plate 5.;COPYRIGHT: (C)1993,JPO&Japio