RF NON-CONTACT MEASUREMENT APPARATUS FOR CONDUCTIVITY AND PERMITIVITY CHANGE OF NON-CONDUCTOR USING RF SIGNAL

摘要

The present invention detects a difference in signal intensity by receiving a frequency (RF) induced current signal transmitted through a medium by outputting an RF signal of a predetermined frequency to one of the coil antennas and the other one of the coil antennas, The signal intensity is measured in advance according to the signal intensity of each frequency and is compared with the signal strength comparison table stored in the controller in advance to detect the change in the conductivity and the nonconductive property, Solubility It is possible to measure accurate and various factors by utilizing characteristics of conductivity change according to TDS, temperature and amount, and dielectric constant change characteristics of nonconductive material. In addition, it is possible to measure various elements with simple structure, easy and economical to manufacture and install, It is possible to conveniently measure changes in conductivity and nonconductive characteristics.