公开(公告)号：US20190188987A1

公开(公告)日：2019-06-20

申请号：US16221574

申请日：2018-12-16

Applicant: SHENZHEN UNIVERSITY

Inventor： Dong SU ,  Junjie HUANG ,  Zhongliang YU

IPC: G08B21/10 ,  G08B3/10

CPC classification number: G08B21/10 ,  G01V9/00 ,  G08B3/10

Abstract: A simple alarm for underground soil loss, includes an insulating installing box and an alarm loop, a rotating shaft is disposed in the insulating installing box; the rotating shaft is provided with a spring torque gauge; a bottom end of the rotating shaft is connected with a pozidriv cross recessed plate head; the spring torque gauge is connected with a first conductive metal sheet; the insulating installing box is connected with a second conductive metal sheet; the second conductive metal sheet is disposed on a motion track formed by that the first conductive metal sheet moves around the rotating shaft; the spring torque gauge, the first and second conductive metal sheets are positioned in the insulating installing box; the pozidriv cross recessed plate head is positioned outside the insulating installing box; and the first and second conductive metal sheets are arranged on the alarm loop.