Coil apparatus of an oscillation sensor of a measuring transducer, measuring transducer of a measuring device and measuring device

Patent metadata

Field	Value
Publication number	US-11953359-B2
Application number	US-201917268878-A
Country	US
Kind code	B2
Filing date	Jul 30, 2019
Priority date	Aug 16, 2018
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

The invention relates to a coil apparatus of an oscillation sensor or exciter of a measuring transducer or a measuring device for measuring a density or mass flow of a medium flowing through a measuring tube of the measuring transducer or measuring device, comprising: a circuit board having a circuit board layer, at least one coil registering or producing a time varying magnetic field, wherein the coil has a winding region and a central region lacking turns of a winding, wherein the central region of a coil has a rectangular shape with oppositely lying, first sides and with oppositely lying, second sides, wherein the first sides have a first side length, and wherein the second sides have a second side length, wherein the electrically conductive trace has a trace breadth of at least 30 micrometer, wherein a ratio of first side length to second side length is greater than 3.25.

First claim

The invention claimed is:

1. A measuring transducer of a measuring device for registering a mass flow or a density of a medium flowing through at least one measuring tube of the measuring transducer, comprising:
the at least one measuring tube having an inlet and an outlet and adapted to convey the medium between inlet and outlet;
at least one exciter, which is adapted to excite the at least one measuring tube to execute oscillations; and at least two sensors, which are adapted to register deflections of oscillations of at least one measuring tube,
wherein the exciter as well as the sensors have, in each case, a coil apparatus and, in each case, a magnet apparatus, wherein the magnet apparatuses are movable relative to their coil apparatuses, and wherein the magnet apparatus and the coil apparatus of an exciter, or sensor, as the case may be, interact by means of magnetic fields,
wherein the measuring transducer has a support body, which is adapted to hold the at least one measuring tube,
wherein the sensors have, in each case, a coil apparatus, wherein the coil apparatus includes:
a circuit board having at least one circuit board layer, wherein each circuit board layer has a first face and second face planparallel to the first face,
at least one coil adapted for registering or producing a time varying magnetic field, wherein the coil is embodied at least sectionally by means of an electrically conductive trace,
wherein the coil is arranged on the first face or second face of a circuit board layer,
wherein the at least one coil has, in each case, a first coil end and, in each case, a second coil end,
wherein an at least one, first coil end as well as at least one, second coil end are connected, in each case, with a contact therefor,
wherein the at least one coil has, in each case, a winding region and a central region lacking turns of a winding, wherein the central region of a coil has a rectangular shape with oppositely lying, first sides and with oppositely lying, second sides, wherein the first sides have a first side length, and wherein the second sides have, in each case, a second side length,
wherein the rectangular shape of the central region has a first side bisector belonging to the first side as well as a second side bisector belonging to the second side, wherein the electrically conductive trace has a trace breadth of at least micrometer,
wherein a ratio of first side length to second side length is greater than 3.25,

wherein a measuring tube oscillatory deflection has an oscillation direction in parallel with the second side of the rectangular shape of the central region;
wherein the magnet apparatus of a sensor or exciter on at least one measuring tube has at least one magnet having at least one magnet end surface facing toward the coil apparatus,

wherein the magnet end surface is bounded by two, first magnet edges arranged opposite one another and two, second magnet edges arranged opposite one another,
wherein, in the case of a measuring tube in rest position and considering the magnet end surface in a projection onto a first face of a circuit board layer, the second magnet edges extend in the direction of an oscillation direction of the measuring tube in parallel with the second side into the central region, wherein a first magnet edge facing the second side bisector is spaced a distance from the second side bisector, wherein the measuring tube is adapted to oscillate with an oscillation amplitude, wherein the distance is greater than half the oscillation amplitude,
wherein the first magnet edge facing the second side bisector extends in parallel with the second side bisector.

2. The measuring transducer of claim 1 ,
wherein the magnet end surface is rectangular.

3. The measuring transducer of claim 1 ,
wherein the second magnet edge in the case of a measuring tube in rest position overlaps the winding region completely in the direction of the second magnet edge.

4. The measuring transducer of claim 1 ,
wherein a length of the first magnet edge is at least 5%, or
wherein a length of the first magnet edge is at least 50 micrometer, and
wherein the first magnet edge facing the second side bisector in the projection is spaced from the winding region in a direction in parallel with the second side bisector.

5. A measuring transducer of a measuring device for registering a mass flow or a density of a medium flowing through at least one measuring tube of the measuring transducer, comprising:
the at least one measuring tube having an inlet and an outlet and adapted to convey the medium between inlet and outlet;
at least one exciter, which is adapted to excite the at least one measuring tube to execute oscillations; and at least two sensors, which are adapted to register deflections of oscillations of at least one measuring tube,
wherein the exciter as well as the sensors have, in each case, a coil apparatus and, in each case, a magnet apparatus, wherein the magnet apparatuses are movable relative to their coil apparatuses, and wherein the magnet apparatus and the coil apparatus of an exciter, or sensor, as the case may be, interact by means of magnetic fields,
wherein the measuring transducer has a support body, which is adapted to hold the at least one measuring tube,
wherein the sensors have, in each case, a coil apparatus, wherein the coil apparatus includes:
a circuit board having at least one circuit board layer, wherein each circuit board layer has a first face and second face planparallel to the first face,
at least one coil adapted for registering or producing a time varying magnetic field,

wherein the coil is embodied at least sectionally by means of an electrically conductive trace,
wherein the coil is arranged on the first face or second face of a circuit board layer,
wherein the at least one coil has, in each case, a first coil end and, in each case, a second coil end,
wherein an at least one, first coil end as well as at least one, second coil end are connected, in each case, with a contact therefor,
wherein the at least one coil has, in each case, a winding region and a central region lacking turns of a winding, wherein the central region of a coil has a rectangular shape with oppositely lying, first sides and with oppositely lying, second sides, wherein the first sides have a first side length, and wherein the second sides have, in each case, a second side length,
wherein the rectangular shape of the central region has a first side bisector belonging to the first side as well as a second side bisector belonging to the second side, wherein the electrically conductive trace has a trace breadth of at least micrometer,
wherein a ratio of first side length to second side length is greater than 3.25,

wherein a measuring tube oscillatory deflection has an oscillation direction in parallel with the second side of the rectangular shape of the central region;
wherein the magnet end surface is perpendicular to a coil axis and has a separation of at least 20 micrometer, or
wherein the magnet end surface has a separation of 200 micrometer.

6. The measuring transducer of claim 5 ,
wherein the at least one magnet arranged on a measuring tube has a ring shape with a closed end and an open end, wherein the open end is adapted to surround an associated coil apparatus and to supply the coil apparatus with a magnetic field extending in parallel with a coil axis.

7. The measuring transducer of claim 5 ,
wherein the measuring transducer comprises at least one pair of measuring tubes, wherein the measuring tubes of the pair are adapted to oscillate oppositely to one another,
wherein at least one sensor or at least one exciter each have a coil apparatus with a coil as well as a magnet apparatus having at least two mag

Assignees

• Flowtec Ag

Inventors

• Ramseyer Severin
• Schwenter Benjamin
• Werner Marc
• Hollinger Claude
• Stucki Martin

Classifications

• G01F1/8422 Primary

  exciters · CPC title

• G01F1/8427

  detectors · CPC title

• G01N9/002

  using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis (G01N9/34 takes precedence) · CPC title

• H01F27/2804

  Printed windings · CPC title

• G01N2009/006

  vibrating tube, tuning fork · CPC title