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1. (WO2018043947) APPARATUS FOR CONTACTLESSLY MEASURING CHANGES IN CONDUCTIVITY AND NON-CONDUCTOR DIELECTRIC CONSTANT CHARACTERISTIC BY USING RF SIGNAL

Pub. No.:    WO/2018/043947    International Application No.:    PCT/KR2017/008688
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Fri Aug 11 01:59:59 CEST 2017
IPC: G01R 27/26
G01N 27/06
Applicants: MULTIPATH CO. ,LTD
(주) 멀티패스
LEE, Kyu Young
이규영
Inventors: LEE, Kyu Young
이규영
Title: APPARATUS FOR CONTACTLESSLY MEASURING CHANGES IN CONDUCTIVITY AND NON-CONDUCTOR DIELECTRIC CONSTANT CHARACTERISTIC BY USING RF SIGNAL
Abstract:
The present invention can detect changes in conductivity and non-conductor characteristics by: outputting an RF signal having a predetermined frequency through one coil antenna and receiving, by the other coil antenna, a frequency (RF)-induced current signal transmitted through a medium, so as to detect the signal strength difference between the signals; and comparing the corresponding frequency signal strength with signal strengths according to frequencies through a frequency-specific signal strength comparison table which is stored in a controller and contains signal strengths previously measured according to medium states on a frequency-by-frequency basis. Accordingly, the present invention can accurately measure various elements by using a conductor medium characteristic in which the conductivity of a conductor medium varies according to the total dissolved solids (TDS), temperature, and quantity thereof and a non-conductor dielectric constant variation characteristic, has a simple structure that is easy and economical to manufacture and install, and can safely and conveniently measure changes in conductivity and non-conductor characteristics in a contactless manner.