Method for operating a flowmeter and respective flowmeter
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01F-015/00
G01F-025/00
G01F-001/72
G01F-015/07
G01F-001/58
G01F-001/00
G01F-011/00
G01F-013/00
G01F-015/075
G01F-022/00
출원번호
US-0150854
(2016-05-10)
등록번호
US-10215607
(2019-02-26)
우선권정보
DE-10 2015 107 366 (2015-05-11)
발명자
/ 주소
Brockhaus, Helmut
Dabrowski, Markus
Florin, Wilhelm
출원인 / 주소
KROHNE Messtechnik GmbH
대리인 / 주소
Borden Ladner Gervais LLP
인용정보
피인용 횟수 :
0인용 특허 :
3
초록▼
Described and shown is a method for operating a flowmeter (1) having a measuring tube (2), wherein the flow (d) of a medium (4) through the measuring tube (2) is measured. A continuous dwell time of the measured flow (d) greater than or equal to a flow threshold (ds) is assigned to a flow interval (
Described and shown is a method for operating a flowmeter (1) having a measuring tube (2), wherein the flow (d) of a medium (4) through the measuring tube (2) is measured. A continuous dwell time of the measured flow (d) greater than or equal to a flow threshold (ds) is assigned to a flow interval (ΔtD,1, ΔtD,2) and a flow volume (V1, V2) is determined from the measured flow (d) in the flow interval (ΔtD,1, ΔtD,2). In each case, a continuous dwell time of the measured flow (d) less than the flow threshold (ds) is assigned to a zero flow interval (ΔtN,1). In each case, a deviation volume of the flow volume (V1, V2) in one of the flow intervals (ΔtD,1, ΔtD,2) from a reference flow volume is determined and the deviation volume is compared to a threshold deviation volume. If the deviation volume in one of the flow intervals (ΔtD,1, ΔtD,2) is less than the threshold deviation volume, a zero flow through the measuring tube (2) is determined and compensated using the measured flow (d) in the zero flow interval (ΔtN,1) directly preceding the flow interval (ΔtD,1, ΔtD,2).
대표청구항▼
1. A method for operating a flowmeter having a measuring tube, wherein the flow (d) of a medium through the measuring tube is measured, wherein in a first flow interval (ΔtD,1), a first continuous dwell time of the measured flow (d) greater than or equal to a flow threshold (ds) is assigned to the f
1. A method for operating a flowmeter having a measuring tube, wherein the flow (d) of a medium through the measuring tube is measured, wherein in a first flow interval (ΔtD,1), a first continuous dwell time of the measured flow (d) greater than or equal to a flow threshold (ds) is assigned to the first flow interval (ΔtD,1) and a first flow volume (V1) is determined from the measured flow (d) in the first flow interval (ΔtD,1),in a zero flow interval (ΔtN,1), a continuous dwell time of the measured flow (d) less than the flow threshold (ds) is assigned to the zero flow interval (ΔtN,1),in a second flow interval (ΔtD,2), a second continuous dwell time of the measured flow (d) greater than or equal to a flow threshold (ds) is assigned to the second flow interval (ΔtD,2) and a second flow volume (V2) is determined from the measured flow (d) in the second flow interval (ΔtD,2),a first deviation volume of the first flow volume (V1) in the first flow interval (ΔtD,1) and a second deviation volume of the second flow volume (V2) in the second flow interval (ΔtD,2), from a reference flow volume are determined and the first deviation volume and the second deviation volume are compared to a threshold deviation volume,when the first deviation volume is less than the threshold deviation volume, a zero flow through the measuring tube is determined and compensated using the measured flow (d) in the zero flow interval (ΔtN,1) directly preceding the first flow interval (ΔtD,1), andwhen the second deviation volume is less than the threshold deviation volume, a zero flow through the measuring tube is determined and compensated using the measured flow (d) in the zero flow interval (ΔtN,1) directly preceding the second flow interval (ΔtD,2). 2. The method according to claim 1, wherein the reference flow volume is determined from at least one of the first flow volumes (V1) or the second flow volume (V2). 3. The method according to claim 2, wherein the reference flow volume is determined in that one of the first flow volumes (V1) or the second flow volume (V2) is assigned to the reference flow volume. 4. The method according to claim 2, wherein the reference flow volume is determined in that an average value of at least two of the flow volumes is determined and assigned to the reference flow volume. 5. The method according to claim 1, wherein the first flow volume (V1) is determined in a first sub-interval of the first flow interval (ΔtD,1), and the second flow volume (V2) is determined in a second sub-interval of the second flow interval (ΔtD,2). 6. The method according to claim 1, wherein the measured flow (d), in each case, is used in a sub-interval (Δt′N,1) of a zero flow interval (ΔtN,1). 7. The method according to claim 1, wherein, when the first deviation volume is less than the threshold deviation volume, a continuous dwell time of the measured volume (d) less than the flow threshold (ds) is assigned to the zero flow interval (ΔtN,1), wherein the zero flow interval (ΔtN,1) directly precedes the first flow interval (ΔtD,1), and when the second deviation volume is less than the threshold deviation volume, a continuous dwell time of the measured volume (d) less than the flow threshold (ds) is assigned to the zero flow interval (ΔtN,1), wherein the zero flow interval (ΔtN,1) directly precedes the second flow interval (ΔtD,2). 8. The method according to claim 1, wherein the zero flow is determined using the measured flow (d) of at least two zero flow intervals (ΔtN,1), in that a moving average is formed from the measured flow (d) in the at least two zero flow intervals (ΔtN,1) or in that a median filter is used on the measured flow (d) in the at least two zero flow intervals (ΔtN,1). 9. A flowmeter having a measuring tube and a controller, wherein the controller measures the flow (d) of a medium through the measuring tube during operation, wherein, during operation, the controller stores a flow threshold (ds), a reference flow volume and a threshold deviation volume,assigns, in a first flow interval (ΔtD,1), a first continuous dwell time of the measured flow (d) greater or equal to the flow threshold (ds) to the first flow interval (ΔtD,1) and determines a first flow volume (V2) from the measured flow (d) in the first flow interval (ΔtD,2),assigns a continuous dwell time of the measured flow (d) less than the flow threshold (ds) to the zero flow interval (ΔtN,1),assigns, in a second flow interval (ΔtD,2), a second continuous dwell time of the measured flow (d) greater or equal to the flow threshold (ds) to the second flow interval (ΔtD,2) and determines a second flow volume (V2) from the measured flow (d) in the second flow interval (ΔtD,2),determines a first deviation volume of the first flow volume (V1) in the first flow intervals (ΔtD,1) and a second deviation volume of the second flow volume (V2) in the second flow interval (ΔtD,2), from the reference flow volume and compares the first deviation volume and the second deviation volume to the threshold deviation volume,when the first deviation volume is less than the threshold deviation volume, determines and compensates the zero flow through the measuring tube using the measured flow (d) in the zero flow interval (ΔtN,1) directly preceding the first flow interval (ΔtD,1), andwhen the second deviation volume is less than the threshold deviation volume, determines and compensates the zero flow through the measuring tube using the measured flow (d) in the zero flow interval (ΔtN,1) directly preceding the second flow interval (ΔtD,2). 10. A method of operating a flowmeter, the flowmeter comprising a measuring tube and a controller, the method comprising: using the measuring tube and the controller, measuring a first measured flow and a first continuous dwell time of the first measured flow during a first flow interval when the first measured flow is greater than or equal to a flow threshold;by the controller, determining a first flow volume based on the first measured flow and the first continuous dwell time;using the measuring tube and the controller, measuring a measured zero flow and a zero flow continuous dwell time of the measured zero flow during a zero flow interval when the measured zero flow is less than the flow threshold;using the measuring tube and the controller, measuring a second measured flow and a second continuous dwell time of the second measured flow during a second flow interval when the second measured flow is greater than or equal to the flow threshold;by the controller, determining a second flow volume based on the second measured flow and the second continuous dwell time;by the controller, determining a deviation volume of the second flow volume based on a reference flow volume, and comparing the deviation volume to a threshold deviation volume;when the deviation volume is less than the threshold deviation volume, compensating, by the controller, the second measured flow based on the measured zero flow,wherein the zero flow interval directly precedes the second flow interval. 11. The method according to claim 10, wherein the reference flow volume is the first flow volume. 12. The method according to claim 10, wherein the reference flow volume is an average of a plurality of preceding flow volumes determined by the controller. 13. The method according to claim 10, wherein determining the deviation volume comprises subtracting the second flow volume from the reference flow volume. 14. The method according to claim 10, wherein compensating the second measured flow based on the measured zero flow comprises subtracting the measured zero flow from the second measured flow. 15. The method according to claim 10, wherein compensating the second measured flow based on the measured zero flow comprises: by the controller, determining within the zero flow interval a zero flow sub-interval excluding asymptotic transient responses of the measured zero flow;by the controller, determining the measured zero flow within the zero flow sub-interval; andby the controller, compensating the second measured flow based on the measured zero flow within the zero flow sub-interval. 16. A flowmeter comprising: a measuring tube; anda controller, wherein the controller is configured: to use the measuring tube to measure a first measured flow and a first continuous dwell time of the first measured flow during a first flow interval when the first measured flow is greater than or equal to a flow threshold;to determine a first flow volume based on the first measured flow and the first continuous dwell time;to use the measuring tube to measure a measured zero flow and a zero flow continuous dwell time of the measured zero flow during a zero flow interval when the measured zero flow is less than the flow threshold;to use the measuring tube to measure a second measured flow and a second continuous dwell time of the second measured flow during a second flow interval when the second measured flow is greater than or equal to the flow threshold;to determine a second flow volume based on the second measured flow and the second continuous dwell time;to determine a deviation volume of the second flow volume based on a reference flow volume, and comparing the deviation volume to a threshold deviation volume;when the deviation volume is less than the threshold deviation volume, to compensate, the second measured flow based on the measured zero flow,wherein the zero flow interval directly precedes the second flow interval. 17. The flowmeter according to claim 16, wherein the reference flow volume is the first flow volume. 18. The flowmeter according to claim 16, wherein the controller determines the deviation volume by subtracting the second flow volume from the reference flow volume. 19. The flowmeter according to claim 16, wherein the controller compensates the second measured flow based on the measured zero flow by subtracting the measured zero flow from the second measured flow. 20. The flowmeter according to claim 16, wherein the controller compensates the second measured flow based on the measured zero flow by: determining within the zero flow interval a zero flow sub-interval excluding asymptotic transient responses of the measured zero flow;determining the measured zero flow within the zero flow sub-interval; andcompensating the second measured flow based on the measured zero flow within the zero flow sub-interval.
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이 특허에 인용된 특허 (3)
Riall James Daniel ; Hyde David Donald, Determining liquid volumes in cup-like vessels on a rotor having vertical deviations.
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