US 12,436,013 B2
Modular Coriolis flowmeter
Ennio Bitto, Aesch (CH); Benjamin Schwenter, Ettingen (CH); Marc Werner, Grenzach-Wyhlen (DE); and Johan Pohl, Freiburg (DE)
Assigned to Endress+Hauser Flowtec AG, Reinach (CH)
Appl. No. 18/256,858
Filed by Endress+Hauser Flowtec AG, Reinach (CH)
PCT Filed Nov. 26, 2021, PCT No. PCT/EP2021/083186
§ 371(c)(1), (2) Date Jun. 9, 2023,
PCT Pub. No. WO2022/122420, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 10 2020 132 986.5 (DE), filed on Dec. 10, 2020.
Prior Publication US 2024/0027251 A1, Jan. 25, 2024
Int. Cl. G01F 1/84 (2006.01)
CPC G01F 1/8477 (2013.01) [G01F 1/8422 (2013.01); G01F 1/8427 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A modular Coriolis flowmeter for determining a process variable of a flowable medium, the flowmeter comprising:
a measuring tube module, comprising:
at least one measuring tube configured to convey the medium;
at least one excitation magnet on a vibration exciter configured to excite vibrations in the at least one measuring tube, wherein the at least one excitation magnet is arranged on the at least one measuring tube; and
at least one sensor magnet on a vibration sensor configured to detect a vibration of the at least one measuring tube, wherein the at least one sensor magnet is arranged on the at least one measuring tube;
a receiving module, comprising:
a receptacle configured to receive the measuring tube module;
at least one excitation coil on the vibration exciter including an excitation coil winding in magnetic effect with the at least one excitation magnet;
at least one sensor coil on the vibration sensor including a sensor coil winding in magnetic effect with the at least one sensor magnet; and
a receiving module body, which includes an electrically conductive and ferromagnetic material, at least in sections, wherein the receiving module body includes an inner lateral surface and an outer lateral surface, wherein the receiving module body includes at least one opening that extends from the inner lateral surface to the outer lateral surface,
wherein a coil holder for the excitation coil and/or sensor coil is disposed in the at least one opening, wherein the coil holder comprises a coil holder body, and wherein the coil holder body is made of an electrically insulating material,
wherein the excitation coil winding has an excitation coil plane delimiting in the coil longitudinal direction and/or the sensor coil winding has a sensor coil plane delimiting in the coil longitudinal direction, wherein the excitation coil plane and/or the sensor coil plane face the receptacle,
wherein the at least one excitation coil and the at least one sensor coil each have a coil diameter,
wherein the at least one opening includes an opening lateral surface,
wherein the excitation coil and/or the sensor coil each have a minimum distance from the opening lateral surface at least equal to the coil diameter, and
wherein the at least one excitation magnet includes an excitation magnet end face facing the at least one opening and/or the sensor magnet includes a sensor magnet end face facing the at least one opening; and
a measuring and/or operating circuit configured to apply an excitation signal to the at least one excitation coil and to detect a sensor signal on the at least one sensor coil.