[특허]Flow meter

ABB Limited

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Flow meter

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01F-001/60
미국특허분류(USC)	073/861.12
출원번호	UP-0840697 (2007-08-17)
등록번호	US-7665368 (2010-04-09)
우선권정보	GB-0616505.4(2006-08-18)
발명자 / 주소	Lincoln, David Armitage, Michael
출원인 / 주소	ABB Limited
대리인 / 주소	Alston & Bird, LLP
인용정보	피인용 횟수 : 6 인용 특허 : 25

초록
▼

An electromagnetic flow meter for measuring flow rate of a fluid passing therethrough includes a conduit defining a fluid inlet, a fluid outlet and a measuring section positioned between the inlet and the outlet. The flow meter also includes a single coil for generating a magnetic field across the measuring section and electrodes for detecting induced electrical potential due to the fluid passage. The flow meter also includes means for conditioning the flow through the measuring section. The combination of the single coil and the flow conditioning means provides a flow meter with a desired level of accuracy. The single coil and the electrodes may be arranged so that the integral of a weight function, which defines the sensitivity of the flow meter to fluid velocity through different parts of the measuring section, over the first half of a measuring section closest to the coil is between 0.4 and 1.3 times the integral of the weight function over the other half of the measuring section.

대표
청구항
▼

That which is claimed: 1. An electromagnetic flow meter apparatus comprising: an elongate section of flow conduit through which fluid can flow along a flow path; an elongate insert positioned within and extending longitudinally along said elongate section of flow conduit, the insert comprising: i) an inlet for receiving fluid flowing along said flow conduit, ii) an outlet in fluid communication with said inlet for outputting fluid that flows through said insert; and iii) a measuring section positioned between, and in fluid communication with, said inlet and outlet; wherein said inlet comprises a restriction for conditioning the fluid flow through said measuring section and wherein said measuring section comprises a single coil for generating a magnetic field across said measuring section. 2. An apparatus according to claim 1 wherein said restriction is formed by a transition section between the inlet and measuring section, wherein the cross-sectional shape of the insert in a direction transverse to said flow path transforms smoothly from the shape of the inlet to the shape of the measuring section in the transition section. 3. An apparatus according to claim 1 wherein the cross-sectional area of the measuring section in a direction transverse to said flow path divided by the cross-sectional area of the flow conduit in a direction transverse to said flow path is less than 0.7. 4. An apparatus according to claim 1 wherein the insert is manufactured substantially from a thermoplastic material. 5. An apparatus according to claim 1 wherein the insert is manufactured substantially from a thermoset material. 6. An apparatus according to claim 1 wherein the insert has a substantially square or rectangular cross-section in a direction transverse to said flow path over at least part of its length. 7. An apparatus according to claim 1 wherein the cross-sectional size and/or shape of the insert are arranged so that a substantially uniform magnetic field may be applied over substantially the whole cross-sectional area of the measuring section of the insert. 8. An apparatus according to claim 1 further comprising electrodes provided integrally with the inset or coupled to the insert. 9. An apparatus according to claim 1 wherein, as a result of said restriction, a space is provided between the measuring section and said flow conduit and wherein the space is back-potted on insertion of the insert into said flow conduit. 10. An apparatus according to claim 1 wherein the insert comprises a detachable flange for retaining the insert in the flow conduit. 11. An apparatus according to claim 1 wherein the flow conduit comprises an outlet that extends away from the flow path for providing power to the coil and for allowing readings to be obtained from the equipment within the flow conduit. 12. An apparatus according to claim 1, wherein said single coil is a saddle shaped coil that extends along the length of the measuring section and that is curved around an outer wall of the measuring section over a predetermined angle. 13. An apparatus according to claim 12, wherein said saddle shaped coil is curved around an outer wall of the measuring section over an effective angle of between 120 and 180 degrees. 14. An apparatus according to claim 13, wherein said single coil is positioned to surround a segment of said measuring section having a segment angle outside said range of angles and further comprising a pole piece that causes said coil to have similar magnetic characteristics to a coil that is positioned to surround a segment of said measuring section that has a segment angle within said range of angles. 15. An apparatus according to claim 12, wherein said single coil is a diamond shaped coil. 16. An apparatus according to claim 1, wherein said single coil is a bobbin coil wound on a pole piece. 17. An apparatus according to claim 1, wherein electrodes are positioned at opposite sides across the flow conduit. 18. An apparatus according to claim 17, wherein the electrodes are arranged, in use, to contact the fluid flowing through said measuring section. 19. An apparatus according to claim 17, wherein the electrodes are arranged, in use, to capacitively sense the electric field generated across said measuring section by said fluid flow. 20. An electromagnetic flow meter apparatus comprising: i) an inlet for receiving fluid flowing along a flow conduit, ii) an outlet in fluid communication with said inlet for outputting fluid that flows through the flow meter; iii) a measuring section positioned between, and in fluid communication with, said inlet and outlet; iv) a single coil positioned adjacent a portion of said measuring section for generating a magnetic field across said measuring section; v) electrodes for sensing electric fields generated by fluid flow through said magnetic field in said measuring section; wherein said single coil and said electrodes are arranged so that the integral of a weight function, which defines the sensitivity of the flow meter to fluid velocity through different parts of the measuring section, over a first half of said measuring section closest to said coil, is between 0.4 and 1.3 times the integral of the weight function over a second half of the measuring section furthest from said coil. 21. A flow meter according to claim 20, wherein said single coil is a saddle shaped coil that extends along the length of the measuring section and that is curved around an outer wall of the measuring section over a predetermined angle. 22. A flow meter according to claim 21, wherein said single coil is a saddle shaped coil that extends along the length of the measuring section and that is curved around an outer wall of the measuring section over an effective angle of between 120 and 180 degrees. 23. A flow meter according to claim 22, wherein said single coil is positioned to surround a segment of said measuring section having a segment angle outside said range of angles and further comprising a pole piece that causes said coil to have similar magnetic characteristics to a coil that is positioned to surround a segment of said measuring section that has a segment angle within said range of angles. 24. A flow meter according to claim 21, wherein said single coil is a diamond shaped coil. 25. A flow meter according to claim 20, wherein said single coil is a bobbin coil wound on a pole piece. 26. A flow meter according to claim 20, comprising a section of conduit and an elongate insert adapted for longitudinal insertion along and within said section of flow conduit, said insert comprising said inlet, outlet and said measuring section. 27. A flow meter according to claim 20, wherein said inlet comprises a restriction for conditioning the fluid flow through said measuring section. 28. A flow meter according to claim 20, wherein the cross-sectional area of the measuring section in a direction transverse to said flow path divided by the cross-sectional area of the flow conduit in a direction transverse to said flow path is less than 70%. 29. A flow meter according to claim 20, wherein said electrodes are positioned at opposite sides across the flow conduit. 30. A flow meter according to claim 20, wherein the electrodes are arranged, in use, to contact the fluid flowing through said measuring section. 31. A flow meter according to claim 20, wherein the electrodes are arranged, in use, to capacitively sense the electric field generated across said measuring section by said fluid flow.

이 특허에 인용된 특허 (25)

이 특허를 인용한 특허 피인용횟수: 6

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상세정보
내보내기 구분	파일저장 인쇄 메일전송
구성항목	관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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특허 상세정보

Flow meter

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이 특허에 인용된 특허 (25)

이 특허를 인용한 특허 피인용횟수: 6

IPC 상위 출원인

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IPC 상세정보(version : 201201)

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Flow meter

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이 특허에 인용된 특허 (25)

이 특허를 인용한 특허 피인용횟수: 6

IPC 상위 출원인

과제정보

상세정보조회

원문조회

IPC 상세정보(version : 201201)

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