[특허]Magnetic flowmeter

Rosemount Inc.

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Magnetic flowmeter

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-001/22 G01F-001/58
미국특허분류(USC)	073/863.11; 073/863
출원번호	US-0630600 (2012-09-28)
등록번호	US-9027418 (2015-05-12)
발명자 / 주소	Smith, Joseph Alan Rogers, Steven Bruce Mayer, Michael John Morales, Nelson Mauricio Junk, Brian Scott
출원인 / 주소	Rosemount Inc.
대리인 / 주소	Westman, Champlin & Koehler, P.A.
인용정보	피인용 횟수 : 0 인용 특허 : 15

초록
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A magnetic flowmeter for sensing process fluid flow is provided. The flowmeter includes a tube configured to receive the process fluid flow therethrough. A plurality of electrodes is disposed to contact process fluid. At least one electromagnetic coil is disposed proximate the tube. Flowmeter electronics are configured to drive a current through at least one electromagnetic coil and to sense a signal developed across a plurality of electrodes disposed to contact process fluid. A flexible circuit module is disposed proximate the tube, and has at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics. The at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces.

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1. A magnetic flowmeter for sensing process fluid flow, the flowmeter comprising: a tube configured to receive the process fluid flow therethrough;a plurality of electrodes disposed to contact process fluid;at least one electromagnetic coil disposed proximate the tube;flowmeter electronics configured to drive a current through the at least one electromagnetic coil and to sense a signal developed across the plurality of electrodes;a flexible circuit module disposed proximate the tube, the flexible circuit module having at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics;wherein the at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces; andwherein the flowmeter is a coaxial, insertion-type magnetic flowmeter. 2. The flowmeter of claim 1, wherein the at least one electromagnetic coil includes a second coil in the flexible circuit module coupled to the plurality of traces. 3. The flowmeter of claim 1, wherein the first coil is formed as an etched circuit trace. 4. The flowmeter of claim 1, wherein the first coil is plated onto a substrate of the flexible circuit module. 5. The flowmeter of claim 1, wherein the first coil is a wire-wound coil. 6. The flowmeter of claim 1, wherein the flexible circuit module also includes at least one of the electrodes, and wherein the at least one electrode is coupled to electrical traces separate from electrical traces coupled to the electromagnetic coil. 7. The flowmeter of claim 6, wherein the flexible circuit module includes the plurality of electrodes, and wherein each of the plurality of electrodes is coupled to electrical traces separate from the electrical traces coupled to the electromagnetic coil. 8. The flowmeter of claim 6, wherein the at least one electrode comprises a raised tip extending inward from the flexible circuit module to contact the process fluid. 9. The flowmeter of claim 1, and further comprising a substantially non-conductive liner disposed between the flexible circuit module and the process fluid except for regions proximate the electrodes. 10. The flowmeter of claim 1, wherein the tube is constructed from carbon steel. 11. The flowmeter of claim 1, wherein the tube comprises an interconnect allowing sealed passage of a plurality of conductors from the at least one electromagnetic coil and the plurality of electrodes to the flowmeter electronics. 12. The flowmeter of claim 11, wherein the plurality of conductors are wires coupled to the flexible circuit module. 13. The flowmeter of claim 11, wherein the interconnect is formed as a glass header. 14. The flowmeter of claim 1, wherein the tube is configured to be mounted at least partially within process piping. 15. The flowmeter of claim 1, wherein a leading edge of the tube has a fluid conditioning surface to condition process fluid through the tube. 16. The flowmeter of claim 15, wherein the fluid conditioning surface is a curved surface. 17. The flowmeter of claim 1, wherein the tube is coupled to an edge that is configured to be mounted between a pair of pipe flanges, the edge having a first surface for contacting the first pipe flange and a second surface for contacting the second flange, and wherein the tube is displaced downstream from the first and second pipe flanges. 18. The flowmeter of claim 17, wherein the edge is a gasketed leading edge. 19. A magnetic flowmeter for sensing process fluid flow, the flowmeter comprising: a tube configured to receive the process fluid flow therethrough;a plurality of electrodes disposed to contact process fluid;at least one electromagnetic coil disposed proximate the tube;flowmeter electronics configured to drive a current through the at least one electromagnetic coil and to sense a signal developed across the plurality of electrodes;a flexible circuit module disposed proximate the tube, the flexible circuit module having at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics;wherein the at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces; andwherein the first coil is formed as an etched circuit trace. 20. The flowmeter of claim 19, wherein the at least one electromagnetic coil includes a second coil in the flexible circuit module coupled to the plurality of traces. 21. The flowmeter of claim 19, wherein the flexible circuit module also includes at least one of the electrodes, and wherein the at least one electrode is coupled to electrical traces separate from electrical traces coupled to the electromagnetic coil. 22. The flowmeter of claim 21, wherein the at least one electrode comprises a raised tip extending inward from the flexible circuit module to contact the process fluid. 23. The flowmeter of claim 19, and further comprising a substantially non-conductive liner disposed between the flexible circuit module and the process fluid except for regions proximate the electrodes. 24. The flowmeter of claim 19, wherein the tube is configured to be mounted at least partially within process piping. 25. A magnetic flowmeter for sensing process fluid flow, the flowmeter comprising: a tube configured to receive the process fluid flow therethrough;a plurality of electrodes disposed to contact process fluid;at least one electromagnetic coil disposed proximate the tube;flowmeter electronics configured to drive a current through the at least one electromagnetic coil and to sense a signal developed across the plurality of electrodes;a flexible circuit module disposed proximate the tube, the flexible circuit module having at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics;wherein the at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces;wherein the flexible circuit module includes the plurality of electrodes, and wherein each of the plurality of electrodes is coupled to electrical traces separate from the electrical traces coupled to the electromagnetic coil; andwherein the at least one electrode comprises a raised tip extending inward from the flexible circuit module to contact the process fluid. 26. The flowmeter of claim 25, wherein the at least one electromagnetic coil includes a second coil in the flexible circuit module coupled to the plurality of traces. 27. The flowmeter of claim 25, wherein the first coil is plated onto a substrate of the flexible circuit module. 28. The flowmeter of claim 25, wherein the first coil is a wire-wound coil. 29. The flowmeter of claim 25, wherein the flexible circuit module also includes at least one of the electrodes, and wherein the at least one electrode is coupled to electrical traces separate from electrical traces coupled to the electromagnetic coil. 30. The flowmeter of claim 25, wherein the tube is configured to be mounted at least partially within process piping. 31. A magnetic flowmeter for sensing process fluid flow, the flowmeter comprising: a tube configured to receive the process fluid flow therethrough;a plurality of electrodes disposed to contact process fluid;at least one electromagnetic coil disposed proximate the tube;flowmeter electronics configured to drive a current through the at least one electromagnetic coil and to sense a signal developed across the plurality of electrodes;a flexible circuit module disposed proximate the tube, the flexible circuit module having at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics;wherein the at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces; andwherein the tube comprises an interconnect allowing sealed passage of a plurality of conductors from the at least one electromagnetic coil and the plurality of electrodes to the flowmeter electronics. 32. The flowmeter of claim 31, wherein the flexible circuit module also includes at least one of the electrodes, and wherein the at least one electrode is coupled to electrical traces separate from electrical traces coupled to the electromagnetic coil. 33. The flowmeter of claim 31, and further comprising a substantially non-conductive liner disposed between the flexible circuit module and the process fluid except for regions proximate the electrodes. 34. The flowmeter of claim 31, wherein the plurality of conductors are wires coupled to the flexible circuit module. 35. The flowmeter of claim 31, wherein the interconnect is formed as a glass header. 36. A magnetic flowmeter for sensing process fluid flow, the flowmeter comprising: a tube configured to receive the process fluid flow therethrough;a plurality of electrodes disposed to contact process fluid;at least one electromagnetic coil disposed proximate the tube;flowmeter electronics configured to drive a current through the at least one electromagnetic coil and to sense a signal developed across the plurality of electrodes;a flexible circuit module disposed proximate the tube, the flexible circuit module having at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics;wherein the at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces; andwherein a leading edge of the tube has a fluid conditioning surface to condition process fluid through the tube. 37. The flowmeter of claim 36, and further comprising a substantially non-conductive liner disposed between the flexible circuit module and the process fluid except for regions proximate the electrodes. 38. The flowmeter of claim 36, wherein the tube is configured to be mounted at least partially within process piping. 39. The flowmeter of claim 36, wherein the fluid conditioning surface is a curved surface. 40. A magnetic flowmeter for sensing process fluid flow, the flowmeter comprising: a tube configured to receive the process fluid flow therethrough;a plurality of electrodes disposed to contact process fluid;at least one electromagnetic coil disposed proximate the tube;flowmeter electronics configured to drive a current through the at least one electromagnetic coil and to sense a signal developed across the plurality of electrodes;a flexible circuit module disposed proximate the tube, the flexible circuit module having at least one flexible circuit containing a plurality of electrical traces electrically coupled to the flowmeter electronics;wherein the at least one electromagnetic coil includes a first coil in the flexible circuit module that is coupled to the electrical traces; andwherein the tube is coupled to an edge that is configured to be mounted between a pair of pipe flanges, the edge having a first surface for contacting the first pipe flange and a second surface for contacting the second flange, and wherein the tube is displaced downstream from the first and second pipe flanges. 41. The flowmeter of claim 40, wherein the edge is a gasketed leading edge.

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Magnetic flowmeter

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