公开(公告)号：WO1995011425A2

公开(公告)日：1995-04-27

申请号：PCT/US1993009942

申请日：1993-10-18

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  KLEVEN, Lowell ,  FRICK, Roger

IPC: G01F01/32

CPC classification number: G01F1/329 ,  G01F15/063 ,  G01F15/068

Abstract: A vortex flow transmitter (10) has a filtering circuit (20) receiving a noise contaminated input signal representative of the flow and which has a fundamental frequency varying responsively to flow. The filter (20) filters the input signal using one of a family of HP filter characteristics. Each member of the family of HP filters has varying corner frequencies, each filter having a unique switchup and a unique switchdown value assigned to it. Adaptive response means (40) select a current HP filter for use in the filter means. The adaptive means use one selection method when the flow is increasing and another selection method when the flow decreases. Output means (52) convert the signal from the filter means into a transmitter output, typically a 4-20 mA current or a frequency output representative of the flow.

Abstract translation: 涡流发射器（10）具有滤波电路（20），其接收表示流量的噪声污染输入信号，并且具有响应于流量变化的基本频率。 滤波器（20）使用HP滤波器特性系列之一对输入信号进行滤波。 HP滤波器系列的每个成员具有不同的转角频率，每个滤波器具有独特的开关和分配给它的唯一的开关值。 自适应响应装置（40）选择用于滤波器装置的当前HP滤波器。 当流量增加时，自适应方法使用一种选择方法，当流量减少时，使用另一种选择方法。 输出装置（52）将来自滤波器装置的信号转换成发射机输出，通常为4-20mA电流或表示流量的频率输出。

公开(公告)号：EP0724714A1

公开(公告)日：1996-08-07

申请号：EP94901169.0

申请日：1993-10-18

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell ,  FRICK, Roger

IPC: G01F1 ,  G01F15

Abstract: A vortex flow transmitter (10) has a filtering circuit (20) receiving a noise contaminated input signal representative of the flow and which has a fundamental frequency varying responsively to flow. The filter (20) filters the input signal using one of a family of HP filter characteristics. Each member of the family of HP filters has varying corner frequencies, each filter having a unique switchup and a unique switchdown value assigned to it. Adaptive response means (40) select a current HP filter for use in the filter means. The adaptive means use one selection method when the flow is increasing and another selection method when the flow decreases. Output means (52) convert the signal from the filter means into a transmitter output, typically a 4-20 mA current or a frequency output representative of the flow.

公开(公告)号：EP1212594B1

公开(公告)日：2005-11-23

申请号：EP00961787.9

申请日：2000-09-12

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell

IPC: G01K13/02 ,  G01F1/36

CPC classification number: G01F1/42 ,  F16L23/006 ,  G01F1/363 ,  G01K13/02

公开(公告)号：EP1212588A1

公开(公告)日：2002-06-12

申请号：EP00961788.7

申请日：2000-09-12

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell

IPC: G01F1/42

CPC classification number: G01F1/42

Abstract: A flow device (100) including a differential flow plate (108) insertable into a flow path between pipe sections (58-1, 58-2) including a flow conduit (110) supporting a flow interrupter (112) and differential pressure taps (114, 116). The flow conduit (110) including a seamless interface (154) between the flow interrupter (112) and the pressure taps (114, 116) to reduce non-attributable pressure loss between differential pressure taps (114, 116) as well as reduce field installation labor including that of pressure testing the various pressure couplings.

公开(公告)号：EP0724714B1

公开(公告)日：2000-02-02

申请号：EP94901169.6

申请日：1993-10-18

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell ,  FRICK, Roger

IPC: G01F1/32

Abstract: A vortex flow transmitter (10) has a filtering circuit (20) receiving a noise contaminated input signal representative of the flow and which has a fundamental frequency varying responsively to flow. The filter (20) filters the input signal using one of a family of HP filter characteristics. Each member of the family of HP filters has varying corner frequencies, each filter having a unique switchup and a unique switchdown value assigned to it. Adaptive response means (40) select a current HP filter for use in the filter means. The adaptive means use one selection method when the flow is increasing and another selection method when the flow decreases. Output means (52) convert the signal from the filter means into a transmitter output, typically a 4-20 mA current or a frequency output representative of the flow.

公开(公告)号：EP1212588B1

公开(公告)日：2008-03-12

申请号：EP00961788.7

申请日：2000-09-12

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell

IPC: G01F1/42

CPC classification number: G01F1/42

Abstract: A flow device (100) including a differential flow plate (108) insertable into a flow path between pipe sections (58-1, 58-2) including a flow conduit (110) supporting a flow interrupter (112) and differential pressure taps (114, 116). The flow conduit (110) including a seamless interface (154) between the flow interrupter (112) and the pressure taps (114, 116) to reduce non-attributable pressure loss between differential pressure taps (114, 116) as well as reduce field installation labor including that of pressure testing the various pressure couplings.

公开(公告)号：EP1212594A1

公开(公告)日：2002-06-12

申请号：EP00961787.9

申请日：2000-09-12

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell

IPC: G01K13/02 ,  G01F1/36

CPC classification number: G01F1/42 ,  F16L23/006 ,  G01F1/363 ,  G01K13/02

Abstract: A differential flow plate (102) insertable into a flow path (106) including a flow interrupter (110) extending about an outer periphery (122) of the flow path (106) forming a constricted flow opening and a temperature sensor channel (120) disposed proximate to the flow interrupter (10).