Title:
APPARATUS FOR CONTACTLESSLY MEASURING CHANGES IN CONDUCTIVITY AND NON-CONDUCTOR DIELECTRIC CONSTANT CHARACTERISTIC BY USING RF SIGNAL
Document Type and Number:
WIPO Patent Application WO/2018/043947
Kind Code:
A1
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.
Inventors:
LEE KYU YOUNG (KR)
Application Number:
PCT/KR2017/008688
Publication Date:
March 08, 2018
Filing Date:
August 10, 2017
Export Citation:
Assignee:
MULTIPATH CO LTD (KR)
LEE KYU YOUNG (KR)
LEE KYU YOUNG (KR)
International Classes:
G01R27/26; G01N27/06
Foreign References:
| JP2012127752A | 2012-07-05 | |||
| KR20110108132A | 2011-10-05 | |||
| JP2010515881A | 2010-05-13 | |||
| JPH0821755A | 1996-01-23 | |||
| JP2005207755A | 2005-08-04 |
Attorney, Agent or Firm:
KIM, Jae Ku (KR)
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