Flow measuring device, measuring tube as well as method for manufacture of a flow measuring device

Patent metadata

Field	Value
Publication number	US-9658088-B2
Application number	US-201314389858-A
Country	US
Kind code	B2
Filing date	Mar 19, 2013
Priority date	Apr 5, 2012
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

A flow measuring device having a line section serving for guiding a flowable medium, wherein the line section is formed at least partially by a cavity in a circuit board.

First claim

The invention claimed is:

1. A flow measuring device having:
a circuit board;
a line section serving for guiding a flowable medium and formed at least partially by a cavity in said circuit board; and
an operating electronics arranged on said circuit board for operating the flow measuring device, wherein:
said circuit board is modularly constructed and includes a first module, on which said operating electronics is arranged; and said circuit board includes, furthermore, a second module, which is electrically and/or mechanically connectable with said first module, and on which said line section is located;
on said circuit board a magnet system is provided, which is composed of planar coils, and which serves to induce a voltage in the medium flowing through said line section during operation of the flow measuring device; and
at least two measuring electrodes are provided on said circuit board, for tapping a voltage induced in the medium.

2. The flow measuring device as claimed in claim 1 , wherein:
a measuring path serving for registering a chemical and/or physical measured variable is integrated into said line section.

3. The flow measuring device as claimed in claim 1 , wherein:
said line section is formed at least partially of a cavity extending on or in said circuit board, in the form of an at least sectionally closed and/or open channel in said circuit board.

4. The flow measuring device as claimed in claim 1 , wherein:
said line section is formed at least partially of an elongated opening in said circuit board.

5. The flow measuring device as claimed in claim 1 , wherein:
said line section is composed essentially of said circuit board, respectively the material of said circuit board.

6. The flow measuring device as claimed in claim 1 , wherein:
a coating is applied on a wall of said circuit board bounding the cavity, in order to seal said circuit board, respectively the material of the circuit board, against the medium flowing through said line section.

7. The flow measuring device as claimed in claim 1 , wherein:
said circuit board is a multilayer circuit board, in the case of which conductive traces are applied on a plurality of layers of said circuit board.

8. The flow measuring device as claimed in claim 1 , wherein:
on said second module, a said magnet system is provided.

9. The flow measuring device as claimed in claim 1 , wherein:
said measuring electrodes are provided on said second module.

10. The flow measuring device as claimed in claim 1 , wherein:
said circuit board has a front side and a rear side;
on the front side and/or the rear side electrical and/or electronic components are secured; and
said cavity forming said line section extends essentially in a plane parallel to a plane extending through the front side, respectively the rear side.

11. The flow measuring device as claimed in claim 1 , wherein:
an inlet and a drain are provided on said second module, in order to introduce the medium into said line section, respectively to drain the medium from said line section.

12. The flow measuring device as claimed in claim 1 , wherein:
said line section is formed of a plurality of circuit boards;
in a first circuit board a first cavity and on a second circuit board a second cavity are provided; and
said first and second circuit boards are connected in such a manner that a line section is formed, which serves for guiding the medium.

13. The flow measuring device as claimed in claim 1 , wherein:
said first and second cavities form shell shaped cavities, from which said line section is composed.

14. A method for manufacture of a line section for a flow measuring device, as claimed in claim 1 , which line section serves to guide a flowable medium, comprising the step of:
forming a cavity in a circuit board, which cavity is used as line section, in order to guide the flowable medium.

15. A measuring tube for a flow measuring device, as claimed in claim 1 , which measuring tube includes a line section, which is formed at least partially by a cavity in a circuit board.

Assignees

• Endress & Hauser Flowtec Ag

Inventors

• Sulzer Thomas
• Oudoire Patrick

Classifications

• G01F1/588 Primary

  combined constructions of electrodes, coils or magnetic circuits, accessories therefor · CPC title

• G01F1/586

  constructions of coils, magnetic circuits, accessories therefor (G01F1/582 takes precedence; magnet; inductances; transformers; selection of materials for their magnetic properties per se H01F) · CPC title

• G01F15/006

  characterised by the use of a particular material, e.g. anti-corrosive material (G01F15/14 takes precedence) · CPC title