公开(公告)号：WO1991004646A1

公开(公告)日：1991-04-04

申请号：PCT/US1990004479

申请日：1990-08-09

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  FREEMAN, Kenneth, J.

IPC: H05B01/02

CPC classification number: G01N25/18 ,  B64D15/20 ,  G08B19/02

Abstract: An ice detector circuit (60) controls heating of an ice detecting probe (62). The circuit (60) generates an icing output as a function of a temperature output generated by the probe (62). A control circuit (114) cyclically controls a start time of the heating. A time measurement circuit (106) measures a warm-up time to a first temperature threshold below the melting temperature, and measuring a melting time to a second temperature above the melting temperature. A comparator (124) compares the melting time to a stored comparison parameter (122) adjusted by the warm-up time and provides the icing output.

Abstract translation: 冰检测器电路（60）控制冰检测探头（62）的加热。 电路（60）产生作为由探头（62）产生的温度输出的函数的结冰输出。 控制电路（114）循环地控制加热的开始时间。 时间测量电路（106）测量到低于熔融温度的第一温度阈值的预热时间，并将熔化时间测量到高于熔融温度的第二温度。 比较器（124）将熔化时间与由预热时间调整的存储的比较参数（122）进行比较，并提供结冰输出。

公开(公告)号：WO1990006470A1

公开(公告)日：1990-06-14

申请号：PCT/US1989005468

申请日：1989-12-04

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  SITTLER, Fred, C. ,  NELSON, Cynthia, R.

IPC: F16L55/18

CPC classification number: F16K99/0001 ,  F15C5/00 ,  F16K99/0015 ,  F16K99/0059 ,  F16K2099/0074 ,  F16K2099/008 ,  F16K2099/0084 ,  G01N30/20 ,  G01N30/6095 ,  G01N2030/205 ,  Y10T137/0402 ,  Y10T137/0491 ,  Y10T137/87716

Abstract: A micromachined miniature valve (10) used for gas chromatography has very low valve and interconnection dimensions to reduce the fluid volume inherent in other gas switching valves to thereby provide accurate measurements involving small gas flows. In order to reduce actuating diaphragm size, without encountering excessive stress concentrations in the diaphragm, the diaphragm (18) can be polyimide film actuated in connection with a silicon valve body (15, 22) having valve seats (40D-45D) with ports that are opened or closed by deflection of the diaphragm (18). Silicon wafers can be micromachined using batch fabrication techniques to provide the necessary valve seats (40D-45D) and passageways (30-35) for operating. The valve assembly (10) is produced as a layered sandwich made up of individual wafers, including an actuator layer (25), a stop layer (22), a valve seat layer (15), and a layer (11) which has flow channels receiving gas from the valve seat layer (15) and making the necessary interconnections to provided outlets. The diaphragm film (18) is positioned between the valve seat layer (15) and the stop layer (22), and is deflected or displaced to control passage of gases through the valve openings. The diaphragm layer (18) is sealed to the silicon valve body (15, 22) by a process which involves fusing, such as glass frit or solder sealing.

公开(公告)号：WO1989003618A1

公开(公告)日：1989-04-20

申请号：PCT/US1988003281

申请日：1988-09-23

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  FRICK, Roger, L.

IPC: H03M01/22

CPC classification number: G08C19/02

Abstract: A digital transmitter (10) with an analog sensor (18) uses an integrating analog-to-digital (A/D) converter (20) to digitize the analog signal from the sensor (18). The A/D converter (20) produces a digital output which is a continuous, non-rezeroed integrated average of the analog signal, so that the integrated average of the digital output over time does not contain inherent quantization errors. A microcomputer system (22) digitally filters the signal from the A/D converter (20), and then uses the digitally filtered signal to produce the transmitter output signal. By varying the response time of the digital filter (22A), the response time and resolution of the transmitter (10) can be varied.

公开(公告)号：WO1988009921A1

公开(公告)日：1988-12-15

申请号：PCT/US1988001747

申请日：1988-05-25

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  FRICK, Roger, L. ,  PIERCE, Dean, S. ,  BRODEN, David, A.

IPC: G01L07/08

CPC classification number: G01L19/142 ,  G01L19/0038 ,  G01L19/0645

Abstract: A transmitter provides an output that is indicative of pressure and has two modular transmitter bodies (20, 30), one (20) including a sensor (22), and the other (30) having an isolator diaphragm (32, 33) with a substantially non-compressible fluid that transfers movement of the isolator diaphragm (32, 33) to the sensor (22). The bodies each have mating passageways (36, 37, 40, 41) to transfer non-compressible fluid from one body (30) to the other (20) and are assembled together using a ring of extrusile material (48, 49) disposed around the mating portions of the passageways to seal the passageways together when the transmitter bodies (20, 30) are assembled. The isolation fluid is filled in the passageways before the first and second transmitter bodies (20, 30) are assembled. The assembly can be accomplished without complex procedures and still insure that accurate transmitter operation will be obtained.

公开(公告)号：WO1988007185A1

公开(公告)日：1988-09-22

申请号：PCT/US1988000694

申请日：1988-03-07

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  FRICK, Roger, L. ,  PIERCE, Dean, S.

IPC: G01L07/08

CPC classification number: G01L19/0645 ,  G01L9/0072 ,  G01L13/025

Abstract: An isolator apparatus (12) for coupling pressure from a pressurized fluid carried in a conduit (40) to a pressure sensor (10A) in a pressure transmitter (10) having an isolation diaphragm (24), isolation fluid (54), and a pressure sealing ring (62) for providing an annular seal around an active region (56) of the isolation diaphragm (24). The isolator apparatus (12) includes a rigid support (58) for spacing the pressure sealing ring (62) away from the active region which reduces pressure measurement errors related to temperature-induced isolation fluid expansion, such that the annular seal (62) overhangs the isolation diaphragm's (24) active region (56).

公开(公告)号：WO1988002850A1

公开(公告)日：1988-04-21

申请号：PCT/US1987002499

申请日：1987-09-28

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  FRICK, Roger

IPC: G01L19/04

CPC classification number: G01G23/01 ,  G01D3/021 ,  G01G7/06 ,  G01L9/12

Abstract: A transmitter (200) senses a process variable (201) and provides a two-wire output adjusted by a span adjustment (203). The transmitter (200) has a sensor (212) which senses the process variable and provides a sensor signal (214). An output circuit (238) provides a two-wire output representative of the sensed process variable. A span-controlling circuit (242) is coupled between the sensor (212) and the output circuit (238) and receives a span adjustment. The span-controlling circuit (242) includes an amplifier (220) coupled to a potentiometer (216) which adjusts the span based on the span adjustment. The wiper (242) of the potentiometer (216) is connected to the amplifier output so that one portion of the potentiometer resistance (R3) provides feedback from the amplifier output to the amplifier input. A second portion of the potentiometer resistance (R4) is coupled between the amplifier output and the output circuit (238). Both portions of resistance affect both the span and the resolution of the output. The arrangement provides an improved resolution over a wide turn-down-ratio.

公开(公告)号：WO1988002528A1

公开(公告)日：1988-04-07

申请号：PCT/US1987002448

申请日：1987-09-24

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  KIELB, John, A. ,  NELSON, Richard, L. ,  PEDERSON, David, L.

IPC: G08C19/04

CPC classification number: G08C19/02

Abstract: An existing analog two-wire transmitter (11) has a sensor module (35), and analog circuits (23) which provide an output representative of a sensed process variable, such as pressure, to a two-wire current loop (14). At least portions of the analog circuit (23) are removed and replaced with apparatus including a digital converter (52) that digitally calculates the transmitter output using the same current range in the current loop (14) and calculating corrections for obtaining linearity of the output.

Abstract translation: 现有的模拟双线发射器（11）具有传感器模块（35）和模拟电路（23），其向二线电流回路（14）提供表示感测的过程变量（例如压力）的输出。 模拟电路（23）的至少部分被去除，并被包括数字转换器（52）的设备替代，数字转换器（52）使用电流回路（14）中相同的电流范围数字地计算发射机输出，并且计算校正以获得输出的线性 。

公开(公告)号：WO1987005390A1

公开(公告)日：1987-09-11

申请号：PCT/US1987000203

申请日：1987-02-02

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  MYHRE, Douglas, C. ,  PUI, David, Y., H. ,  MILLER, Larry, V. ,  CHRISTENSEN, Charles, L.

IPC: G01J05/08

CPC classification number: G01J5/02 ,  G01J5/0088 ,  G01J5/029 ,  G01J5/041 ,  G01J5/08 ,  G01J5/0806 ,  G01J5/0818 ,  G01J5/0893 ,  G03F7/70933

Abstract: A radiation instrument (10) has a purging air flow system (39, 42, 50, 57, 42A) for passing air over the lens (28) to keep it clean and free from particulate contaminants and also for providing a positive flow of air away from the lens (28). The air supply (14) used for such purging is controlled adequately so the flow changes direction (39, 57, 42A) and particles are removed from the main flow of purge air (62) by inertial separation prior to the time the air contacts the lens (28). Such air entrained particles might otherwise deposit on the lens (28). A flow control orifice (65) provides a secondary flow (69) to carry the particles separated from the main flow out of the flow passageway (39).

公开(公告)号：WO1987002152A1

公开(公告)日：1987-04-09

申请号：PCT/US1986001858

申请日：1986-09-12

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  BROWN, Gregory, C.

IPC: G05D16/00

CPC classification number: G05D16/163 ,  Y10T137/2409

Abstract: A fluid amplifier (10) is used in a pneumatic transducer to provide to a control port output pressure Pout in response to a pilot pressure Pin provided as a function of a current signal. The fluid amplifier (10) includes a valve (54) that opens a pressure source to the control port (64) and also controls pressure feeding through an exhaust passageway (47). The amplifier valve (54) is provided with a negative feedback arrangement (38, 42) as the exhaust back pressure increases to stabilize the operation and make the amplifier less sensitive. The pneumatic amplifier (10) is provided with a diaphragm arrangement (38, 42) that results in increasing exhaust back pressures tending to close the exhaust valve (55), rather than open the exhaust valve (55). The negative feedback makes the amplifier more easily controlled and provides for more stable operation.

公开(公告)号：WO1987001606A1

公开(公告)日：1987-03-26

申请号：PCT/US1986001859

申请日：1986-09-12

Applicant: ROSEMOUNT INC.

Inventor： ROSEMOUNT INC. ,  HAGEN, Floyd, W. ,  DELEO, Richard, V.

IPC: B01D19/00

CPC classification number: G01P5/17 ,  B01D53/26 ,  G01L19/0007

Abstract: A unitized drain manifold apparatus (10) for removing water from air in a conduit of an air data sensor system (9) for an aircraft (10) comprises a manifold (11) having a plurality of drain cavities (13) therein. Each drain cavity (13) has a center chamber portion (15) and two end drain chambers (23) positioned vertically above and below the center chamber portion (15) when the aircraft (10) is at rest. The end drain chambers (23) are used for accumulation of water which is separated from the air pressure signal. The cavities (13) are each equipped with two drain passageways (28) such that the accumulated water can be removed from the manifold (11) in normal or inverted positions. The positioning of the external drain passageways (28) permits water accumulation and removal to occur independently of the spatial orientation of the sensor (9) and manifold (11) and the symmetry of the manifold (11) permits it to be mounted on either side of the aircraft (10).