Patent ID: 9618380
Date: 2017-04-11
CPC Classifications: G01F,G01V

Claim:
1. A multi measurement system for measuring a water level of each of groundwater and surface water, the multi measurement system comprising: a first water level measurement sensor, which is a water level measurement sensor for measuring the water level of the groundwater, disposed to allow a first floating permanent magnet to float on a water surface of the groundwater; a second water level measurement sensor, which is the water level measurement sensor for measuring the water level of the surface water, disposed to allow a second permanent magnet to float on a water surface of the surface water; a controller measuring an elastic wave reflected from the first floating permanent magnet to measure the water level of the groundwater and measuring an elastic wave reflected from the second floating permanent magnet to measure the water level of the surface water; and a monitoring server for monitoring water level data of the groundwater and surface water according to a predetermined cycle, wherein the water level measurement sensor for measuring a water level of groundwater and surface water by using magnetostriction displacement, the water level measurement sensor comprising: an outer case having a hollow space therein and extending in a longitudinal direction; a magnetostriction line spaced apart from an inner wall in the hollow space of the outer case to extend in the longitudinal direction; a floating permanent magnet guided along the magnetostriction line to be movable in the longitudinal direction, the floating permanent magnet being changed in position to correspond to a water level; and a transceiver applying a current pulse into the magnetostriction line to receive an elastic wave that is generated while first magnetic fields formed in a circumferential direction of the magnetostriction line by the current pulse crosses a second magnetic fields formed in an axial direction of the magnetostriction line by the permanent magnet, wherein a first tip portion disposed on an end of the first water level measurement sensor is fixed to a bottom surface of a stratum on which the groundwater flows, and a second tip portion disposed on an end of the second water level measurement sensor is fixed to a bottom surface of a stratum on which the surface water flows.