US 12,241,853 B2
Dielectric-constant measuring device
Thomas Blödt, Steinen (DE); and Pablo Ottersbach, Essen (DE)
Assigned to Endress+Hauser SE+Co. KG, Maulburg (DE)
Appl. No. 18/040,998
Filed by Endress+Hauser SE+Co. KG, Maulburg (DE)
PCT Filed Jul. 22, 2021, PCT No. PCT/EP2021/070511
§ 371(c)(1), (2) Date Feb. 8, 2023,
PCT Pub. No. WO2022/033831, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 10 2020 121 154.6 (DE), filed on Aug. 11, 2020.
Prior Publication US 2023/0266262 A1, Aug. 24, 2023
Int. Cl. G01N 27/22 (2006.01); G01N 22/00 (2006.01); G01R 27/26 (2006.01)
CPC G01N 27/221 (2013.01) [G01N 22/00 (2013.01); G01R 27/2635 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A high-frequency-based measuring device for determining a dielectric constant of a medium, comprising:
a signal-generating unit embodied to generate an electrical high-frequency signal at a defined frequency;
a transmitting electrode embodied to be located in the medium, wherein the transmitting electrode, for emitting a high-frequency signal, has a depth of at most one-quarter of a wavelength corresponding to the defined frequency of the electrical high-frequency signal;
a receiving electrode embodied to be located in the medium, wherein the receiving electrode is located at a distance from the transmitting electrode of at most one-quarter of the wavelength corresponding to the frequency of the electrical high-frequency signal, in order to receive the emitted high-frequency signal after passage of the emitted high-frequency signal through the medium; and
an evaluation unit connected to the receiving electrode and designed to determine the dielectric constant of the medium based at least upon the received high-frequency signal,
wherein a temperature sensor is arranged in the interior of the transmitting electrode or in the interior of the receiving electrode, and wherein the evaluation unit is designed to determine the dielectric constant of the medium in a temperature-compensated manner on the basis of the temperature sensor.