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公开(公告)号：DE3883773D1
公开(公告)日：1993-10-07
申请号：DE3883773
申请日：1988-06-02
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL
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公开(公告)号：WO9511425A3
公开(公告)日：1995-06-08
申请号：PCT/US9309942
申请日：1993-10-18
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL , FRICK ROGER
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: 涡流发送器（10）具有滤波电路（20），该滤波电路接收表示流量的噪声污染输入信号并且具有响应于流量而变化的基频。 滤波器（20）使用一系列HP滤波器特性中的一个滤波输入信号。 HP滤波器系列的每个成员都具有不同的拐角频率，每个滤波器都有一个独特的开关和分配给它的唯一开关值。 自适应响应装置（40）选择用于滤波器装置中的当前HP滤波器。 自适应手段在流量增加时使用一种选择方法，在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变送器输出，典型地是代表流量的4-20mA电流或频率输出。
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公开(公告)号：DE3854331T2
公开(公告)日：1996-04-18
申请号：DE3854331
申请日：1988-06-02
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL
Abstract: An ice detector circuit for sensing an ice deposition on a sensing surface of an ice detector probe from an air mass flowing relative to the probe. The probe includes a heater to heat the sensing surface and a temperature sensor for sensing the sensing surface temperature during heating. The temperature sensor provides the circuit with an output having a level varying as a function of the sensing surface temperature. The circuit includes a controller which selectively energizes the heater, a timer which provides a timing output representative of a time interval elapsed between selected temperature sensor output levels, and computing means, such as a microprocessor, which computes an output representative of ice deposition as a function of a predetermined relationship between ice deposition and the timing output.
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公开(公告)号：DE3854331D1
公开(公告)日：1995-09-21
申请号：DE3854331
申请日：1988-06-02
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL
Abstract: An ice detector circuit for sensing an ice deposition on a sensing surface of an ice detector probe from an air mass flowing relative to the probe. The probe includes a heater to heat the sensing surface and a temperature sensor for sensing the sensing surface temperature during heating. The temperature sensor provides the circuit with an output having a level varying as a function of the sensing surface temperature. The circuit includes a controller which selectively energizes the heater, a timer which provides a timing output representative of a time interval elapsed between selected temperature sensor output levels, and computing means, such as a microprocessor, which computes an output representative of ice deposition as a function of a predetermined relationship between ice deposition and the timing output.
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公开(公告)号：AU5585194A
公开(公告)日：1995-05-08
申请号：AU5585194
申请日：1993-10-18
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL , FRICK ROGER
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.
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Patent Agency Ranking
公开(公告)号：DE60038306D1
公开(公告)日：2008-04-24
申请号：DE60038306
申请日：2000-09-12
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL
Abstract: A flow device including a differential flow plate insertable into a flow path between pipe sections including a flow conduit supporting a flow interrupter and differential pressure taps. The flow conduit including a seamless interface between the flow interrupter and the pressure taps to reduce non-attributable pressure loss between differential pressure taps as well as reduce field installation labor including that of pressure testing the various pressure couplings.
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公开(公告)号：DE69327806T2
公开(公告)日：2000-10-12
申请号：DE69327806
申请日：1993-10-18
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL , FRICK ROGER
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公开(公告)号：DE3886946D1
公开(公告)日：1994-02-17
申请号：DE3886946
申请日：1988-09-12
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL , CORPRON GARY
IPC: G01F1/32
Abstract: A vortex sensor used in a vortex flowmeter that has a single sensing diaphragm parallel to the direction of flow that is sensitive to differential pressures caused by vortices shed by a vortex shedding bar associated with the sensing diaphragm. A beam is attached to the sensing diaphragm and it transfers the deflecting motion of the sensing diaphragm due to differential pressures to a sensor external to the flow passageway. The sensor provides an output indicating motions of the beam caused by the beam pivoting when the sensing diaphragm deflects. The beam preferably is pivoted on a relatively rigid, fluid-tight isolator diaphragm with one end of the beam on the outside of the isolator diaphragm. The sensing diaphragm which is used to measure differential pressure rejects variations in the static pressure, that is, increases and decreases of the static pressure on both sides of the diaphragm, which is a common source of problems with existing vortex flowmeter sensors.
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公开(公告)号：DE60010728T3
公开(公告)日：2010-02-18
申请号：DE60010728
申请日：2000-09-22
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL , TEWFIK AHMED
IPC: G05B23/02 , G08C15/00 , G01D21/00 , G05B13/04 , G05B19/042 , G05B19/418 , G06F17/10 , G06F17/17 , G08C13/00 , G08C19/02
Abstract: A transmitter for measuring a process variable includes a sensor configured to couple to a process and having a sensor output related to the process variable. A microprocessor coupled to the sensor output provides a process variable output which is a function of an orthogonal-polynomial of the sensor output. A transmitter output is configured to provide an output related to the process variable.
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公开(公告)号：DE60038306T2
公开(公告)日：2009-03-26
申请号：DE60038306
申请日：2000-09-12
Applicant: ROSEMOUNT INC
Inventor： KLEVEN LOWELL
Abstract: A flow device including a differential flow plate insertable into a flow path between pipe sections including a flow conduit supporting a flow interrupter and differential pressure taps. The flow conduit including a seamless interface between the flow interrupter and the pressure taps to reduce non-attributable pressure loss between differential pressure taps as well as reduce field installation labor including that of pressure testing the various pressure couplings.
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