US 12,270,769 B2
Method for determining a coating property
Anne Habermehl, Erding (DE); Stefan Pflüger, Munich (DE); and Wolfgang Drahm, Freising (DE)
Assigned to Endress+Hauser Flowtec AG, Reinach (CH)
Appl. No. 18/257,696
Filed by Endress+Hauser Flowtec AG, Reinach (CH)
PCT Filed Nov. 26, 2021, PCT No. PCT/EP2021/083214
§ 371(c)(1), (2) Date Jun. 15, 2023,
PCT Pub. No. WO2022/128417, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 10 2020 133 858.9 (DE), filed on Dec. 16, 2020.
Prior Publication US 2024/0077433 A1, Mar. 7, 2024
Int. Cl. G01N 22/00 (2006.01); G01F 1/58 (2006.01); G01F 1/74 (2006.01)
CPC G01N 22/00 (2013.01) [G01F 1/74 (2013.01); G01F 1/58 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for determining a deposit property of a variable deposit on an end face of a first microwave antenna of an assembly for determining a property of a multiphase medium that is to be conveyed, wherein the first microwave antenna is arranged in a first receptacle of a measuring pipe of the assembly in a medium-contacting manner, the method comprising:
emitting an excitation signal via the first microwave antenna, wherein the excitation signal includes a sequence of high-frequency signals;
receiving, via the first microwave antenna, a reflected excitation signal that is reflected from an interface of the first microwave antenna with the multiphase medium or with the variable deposit;
determining a first test quantity on the basis of the reflected excitation signal, wherein the first test quantity is a sum, an integral, or a mean value over a first frequency range of the reflected excitation signal; and
determining on the basis of the first test quantity the deposit property of the variable deposit, wherein the deposit property is a variable dependent on a deposit thickness of the variable deposit.