NON-CONTACT TYPE MEASURING APPARATUS FOR CONDUCTIVITY AND PERMITTIVITY OF NON-CONDUCTIVE FLUID USING RF SIGNAL

    公开(公告)号:US20190257868A1

    公开(公告)日:2019-08-22

    申请号:US16312523

    申请日:2017-08-10

    发明人: Kyu Young LEE

    IPC分类号: G01R27/26 G01N33/26

    摘要: Non-contact type measuring apparatus able to detect a difference in signal intensity by transmitting a radio frequency (RF) signal having a predetermined frequency through one of two coil antennas and receiving an induced RF current signal transmitted via a medium through the other coil antennas and detect conductivity and a variation in characteristic of a non-conductor by comparing the signal intensity with a signal intensity comparison table for each frequency, which is stored in a controller by measuring a signal intensity for each frequency in advance, on the basis of the signal intensity for each frequency. The non-contact type measuring apparatus can accurately measure not only various elements using a characteristic in which conductivity is varied according to total dissolved solid, temperature, and an amount of a conductive medium and permittivity change characteristic of a non-conductor, but also conductivity and variation in characteristic of the non-conductor.

    COVER OPENING AND CLOSING DEVICE USING SLIDING AND ROTATION

    公开(公告)号:US20230295967A1

    公开(公告)日:2023-09-21

    申请号:US18098751

    申请日:2023-01-19

    IPC分类号: E05C19/02 E05B83/28

    CPC分类号: E05C19/022 E05B83/28

    摘要: A cover slides to protrude outward from a mounted position. At the same time, the cover may rotate to be opened, and thus a gap between the cover and an inlet portion on which the cover is mounted is minimized. The cover may be opened or closed easily and conveniently without degrading a sense of beauty and aesthetics at the portion on which the cover is mounted. The cover is caught and locked by a push latch. The cover may slide and rotate by being easily unlocked when being pressed by a hand. A user may easily and conveniently use the cover by a simple operation of pressing the cover. A sudden rotation of the cover is prevented using an elastic support member and a damper, and thus the cover can be conveniently used even while an occurrence of noise or collision between the cover and surroundings is prevented.

    Non-contact type measuring apparatus for conductivity and permittivity of non-conductive fluid using RF signal

    公开(公告)号:US11061057B2

    公开(公告)日:2021-07-13

    申请号:US16312523

    申请日:2017-08-10

    发明人: Kyu Young Lee

    IPC分类号: G01R27/26 G01N33/26 G01N27/06

    摘要: Non-contact type measuring apparatus able to detect a difference in signal intensity by transmitting a radio frequency (RF) signal having a predetermined frequency through one of two coil antennas and receiving an induced RF current signal transmitted via a medium through the other coil antennas and detect conductivity and a variation in characteristic of a non-conductor by comparing the signal intensity with a signal intensity comparison table for each frequency, which is stored in a controller by measuring a signal intensity for each frequency in advance, on the basis of the signal intensity for each frequency. The non-contact type measuring apparatus can accurately measure not only various elements using a characteristic in which conductivity is varied according to total dissolved solid, temperature, and an amount of a conductive medium and permittivity change characteristic of a non-conductor, but also conductivity and variation in characteristic of the non-conductor.