Title:
FLOODING SENSOR, FLOODING WARNING SYSTEM AND DISASTER WARNING SYSTEM
Document Type and Number:
Japanese Patent JP2021196185
Kind Code:
A
Abstract:
To provide a flooding sensor, a flooding warning system and a disaster warning system that can be realized easily at low cost.SOLUTION: A flooding sensor 40 detects the occurrence of flooding. This flooding sensor comprises: a main electrode 41 with its lower end arranged at a height higher than or equal to an installation plane; first to third measurement electrodes 42-44 arranged to the main electrode 41 with a space therebetween with their lower ends arranged at first to third water level heights H1-H3 that are positions higher than the lower end of the main electrode 41; an AC voltage generation unit 45 for applying an AC voltage between the main electrode 41 and the first to third measurement electrodes 42-44; and a control unit 22 for detecting the occurrence of flooding to the installation plane, on the basis of detection that a current has flown between the main electrode 41 and the first to third measurement electrodes 42-44.SELECTED DRAWING: Figure 6
Inventors:
TAKEDA YOSHIO
Application Number:
JP2020100518A
Publication Date:
December 27, 2021
Filing Date:
June 09, 2020
Export Citation:
Assignee:
YANAGI ELEC CO LTD
International Classes:
G01F23/24; G01N27/06; G08B21/10; G08B25/08; G08B27/00; H04M11/04
Attorney, Agent or Firm:
Hiroshi Okawa