公开(公告)号：EP0374161B1

公开(公告)日：1993-09-01

申请号：EP88906310.3

申请日：1988-06-02

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell, A.

IPC: G01W1/00 ,  B64D15/00 ,  G08B19/02

CPC classification number: B64D15/20 ,  G08B19/02

Abstract: An ice detector probe (10) senses an ice deposition from an air mass flowing relative to the probe (10). The probe (10) includes a support (12) for installation of the probe (10) to receive the airflow and an element (30) formed on a substrate having a sensing surface (32) which directly receives the airflow. The element (30) heats the sensing surface (32) to melt an ice deposition formed thereon. The element (30) also senses the sensing surface temperature during heating and provides an output representative of such temperature.

公开(公告)号：EP2002213B1

公开(公告)日：2012-07-11

申请号：EP07753978.1

申请日：2007-03-26

Applicant: Rosemount, Inc.

Inventor： KLEVEN, Lowell, A.

IPC: G01D3/028

CPC classification number: G01D3/028 ,  G01D5/24

Abstract: A circuit (100) that senses a process variable (PROC. VAR.), comprises a voltage divider (106) that includes first (102) and second (104) capacitances. At least one of the capacitances is varied by the process variable. Divider ends (128,130) receive modulated potentials (El, E2), and a divider center tap (108) coupled to a detector. The detector has a detector output (118) representing carrier frequency range components. A control circuit (120) controls a baseband envelope of the modulated potentials as a function of the detector output.

公开(公告)号：EP1214633B2

公开(公告)日：2009-07-22

申请号：EP00963693.7

申请日：2000-09-22

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell, A. ,  TEWFIK, Ahmed, H.

IPC: G05B23/02 ,  G05B19/418 ,  G05B19/042

CPC classification number: G01F1/42 ,  G01F25/0007 ,  G05B19/0423 ,  G05B2219/31126 ,  G05B2219/34084 ,  G05B2219/34142 ,  G05B2219/37401

Abstract: A transmitter (10) for measuring a process variable includes a sensor (102) configured to couple to a process and having a sensor output (120) related to the process variable. A microprocessor (106) coupled to the sensor output (120) provides a process variable output which is a function of an orthogonal-polynomial of the sensor output (120). A transmitter output is configured to provide an output related to the process variable.

公开(公告)号：EP2002213A2

公开(公告)日：2008-12-17

申请号：EP07753978.1

申请日：2007-03-26

Applicant: Rosemount, Inc.

Inventor： KLEVEN, Lowell, A.

IPC: G01D3/028

CPC classification number: G01D3/028 ,  G01D5/24

Abstract: A circuit (100) that senses a process variable (PROC. VAR.), comprises a voltage divider (106) that includes first (102) and second (104) capacitances. At least one of the capacitances is varied by the process variable. Divider ends (128,130) receive modulated potentials (El, E2), and a divider center tap (108) coupled to a detector. The detector has a detector output (118) representing carrier frequency range components. A control circuit (120) controls a baseband envelope of the modulated potentials as a function of the detector output.

公开(公告)号：EP1423715A1

公开(公告)日：2004-06-02

申请号：EP02757209.8

申请日：2002-08-16

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell, A.

IPC: G01R19/22

CPC classification number: G01F1/3263 ,  G01F1/329 ,  G01F25/0076 ,  G01R19/22

Abstract: A diagnostic device for testing a piezoelectric sensor (10) includes an AC source (32) configured to apply an AC signal to the piezoelectric sensor (10) at two or more different frequencies. The response of the piezoelectric sensor (10) can be measured (48) and used for diagnostics (52).

公开(公告)号：EP0394256B1

公开(公告)日：1995-08-16

申请号：EP88906309.5

申请日：1988-06-02

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell, A.

IPC: G08B19/02 ,  B64D15/00 ,  G01D5/34

CPC classification number: G08B19/02 ,  B64D15/20

Abstract: An ice detector circuit (10) for sensing an ice deposition on a sensing surface (14) of an ice detector probe (12) from an air mass flowing relative to the probe (12). The probe (12) includes a heater (16) to heat the sensing surface (14) and a temperature sensor (18) for sensing the sensing surface temperature during heating. The temperature sensor (18) provides the circuit (10) with an output having a level varying as a function of the sensing surface temperature. The circuit (10) includes a controller (24) which selectively energizes the heater (16), a timer (26) which provides a timing output representative of a time interval elapsed between selected temperature sensor output levels, and computing means (28), 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.

Abstract translation: 一种用于感测冰探测器探测器（12）的感测表面（14）上的冰沉积与相对于探测器（12）流动的空气质量的冰探测器电路（10）。 探头（12）包括用于加热感测表面（14）的加热器（16）和用于在加热期间感测感测表面温度的温度传感器（18）。 温度传感器（18）向电路（10）提供具有作为感测表面温度的函数而变化的电平的输出。 电路（10）包括选择性地激励加热器（16）的控制器（24），提供代表在选定的温度传感器输出电平之间流逝的时间间隔的定时输出的定时器（26），以及计算装置（28） 诸如微处理器，其根据冰沉积与定时输出之间的预定关系来计算代表冰沉积的输出。

公开(公告)号：EP0377663B1

公开(公告)日：1994-01-05

申请号：EP88908623.7

申请日：1988-09-12

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell, A. ,  CORPRON, Gary, P.

IPC: G01F1/32

CPC classification number: G01F1/3263

Abstract: A vortex sensor (20) in a vortex flowmeter (10) that has a single sensing diaphragm (35) parallel to the direction of flow that is sensitive to differential pressures caused by vortices shed by a vortex shedding bar (19) associated with the sensing diaphragm (35). A beam (36) is attached to the sensing diaphragm (35) and it transfers the deflecting motion of the sensing diaphragm (35) to a sensor (48) external to the flow passageway (14). The sensor (48) provides an output indicating motions of the beam (36) caused by the beam pivoting when the sensing diaphragm (35) deflects. The beam (36) is pivoted on a relatively rigid, fluid-tight isolator diaphragm (40) with one end of the beam (36) on the outside of the isolator diaphragm (40). The sensing diaphragm (35) rejects variations in the static pressure, that is, increases and decreases of the static pressure on both sides of the diaphragm (35).

公开(公告)号：EP0377663A1

公开(公告)日：1990-07-18

申请号：EP88908623.0

申请日：1988-09-12

Applicant: ROSEMOUNT INC.

Inventor： KLEVEN, Lowell, A. ,  CORPRON, Gary, P.

IPC: G01F1

CPC classification number: G01F1/3263

Abstract: Un détecteur de tourbillon (20) monté dans un débitmètre à tourbillons (10) possède un diaphragme de détection unique (35) parallèle au sens d'écoulement et est sensible aux pressions différentielles dues aux tourbillons formés par une barre de formation (19) de tourbillons associée au diaphragme de détection (35). Une tige (36) est attachée au diaphragme de détection (35) et elle transfère le mouvement de déflection du diaphragme de détection (35) vers un détecteur (48) monté en dehors du passage d'écoulement (14). Le détecteur (48) fournit un signal de sortie indicatif des mouvements de la tige (36) provoqués par son pivotement lorsque des déflections se produisent au niveau du diaphragme de détection (35). La tige (36) pivote sur un diaphragme isolant (40) relativement rigide et étanche au fluide, une extrémité de la tige (36) se trouvant à l'extérieur du diaphragme isolant (40). Le diaphragme de détection (35) rejette les variations de pression statique, c'est-à-dire des augmentations ou diminutions de la pression statique des deux côtés du diaphragme (35).