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公开(公告)号：CA2808181C
公开(公告)日：2017-03-07
申请号：CA2808181
申请日：2011-08-09
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , LU LIANGIU
Abstract: A sensor system (100) for sensing a process variable of fluid at a first location including a variable resonator (200, 220) disposed at the first location (106) having a resonant frequency (110) which varies in response to the process variable of the fluid and responsively provides a resonant acoustic signal at the resonant frequency indicative of the process variable. An acoustic sensor (118) disposed at a second location which is spaced apart from the variable resonator is configured to receive the resonant acoustic signal transmitted from the variable resonator (110). Measurement circuitry (102) coupled to the acoustic sensor (118) configured to provide a process variable output related to the process variable of the fluid in response to the received resonant acoustic signal.
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公开(公告)号：CA2878920C
公开(公告)日：2017-02-14
申请号：CA2878920
申请日：2013-06-21
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C
IPC: G01L27/00
Abstract: A method (150) of verifying a condition of a single-crystal pressure sensor (100) is provided. The method (150) includes providing a single-crystal pressure sensor (100) that has at least one electrical characteristic that varies with applied pressure being coupled to a first output and a second output. The pressure sensor (100) also has at least one resistive element therein. A current is applied through the resistive element (122) to heat (152) the pressure sensor (100). At least one output of the pressure sensor (100) is monitored (154) to determine a response of the pressure sensor (100) to current-induced heat. A verification output is provided (156) based on the response.
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公开(公告)号：CA2872186C
公开(公告)日：2017-01-31
申请号：CA2872186
申请日：2013-03-12
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C
IPC: G01L19/06
Abstract: A process variable transmitter (32) for measuring a pressure of a process fluid includes a sensor module (52), a pressure inlet formed in the sensor module, an isolation diaphragm (90) positioned in the pressure inlet, a pressure sensor (56) and an isolation tube (93, 94) containing a fill fluid to convey a process fluid related pressure from the isolation diaphragm to the pressure sensor (56). A hydrogen getter (222) material is positioned in contact with the fill fluid between the isolation diaphragm (90) and the pressure sensor (56) to remove hydrogen from the fill fluid.
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公开(公告)号：CA2988562A1
公开(公告)日：2016-12-29
申请号：CA2988562
申请日：2016-05-12
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , WILLCOX CHARLES R
IPC: G01N17/00
Abstract: A corrosion measurement system (100) includes a corrosion sensor (110) having a corrosion sensor output related to corrosion due to exposure to a process fluid (104). A process variable sensor (106) provides a process variable output related to a process variable of the process fluid (104). Measurement circuitry (120) coupled to the corrosion sensor (110) and the process variable sensor (106) provides an output related to corrosion based upon the corrosion sensor output and the process variable output
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公开(公告)号：AU2014303080B2
公开(公告)日：2016-09-08
申请号：AU2014303080
申请日：2014-06-03
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , SITTLER FRED C
Abstract: A process fluid pressure measurement probe (100) includes a pressure sensor (112) formed of a single-crystal material and mounted to a first metallic process fluid barrier (130) and disposed for direct contact with a process fluid. The pressure sensor (112) has an electrical characteristic that varies with process fluid pressure. A feedthrough (122) is formed of a single-crystal material and has a plurality of conductors extending from a first end to a second end. The feedthrough (122) is mounted to a second metallic process fluid barrier (116) and is spaced from, but electrically coupled to, the pressure sensor (112). The pressure sensor (112) and the feedthrough (122) are mounted such that the secondary metallic process fluid barrier (116) is isolated from process fluid by the first metallic process fluid barrier (116).
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Patent Agency Ranking
公开(公告)号：CA2958220A1
公开(公告)日：2016-04-07
申请号：CA2958220
申请日：2015-09-30
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C
IPC: G01F23/284
Abstract: A multivariable fluid level detection system (10) comprising a guided wave radar probe (20) with sensor or sensors (24a-24n) integral to the probe (28) for producing sensor signal(s), a transmitter (44) for transmitting guided microwave pulses down the probe (28), a receiver (46) for receiving reflected microwave pulses, and a processor (52) for producing a measurement of fluid level based upon a time difference between transmission of a pulse and receipt of a reflected pulse and the sensor signal(s).
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公开(公告)号：AU2014303080A1
公开(公告)日：2015-12-24
申请号：AU2014303080
申请日：2014-06-03
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , SITTLER FRED C
Abstract: A process fluid pressure measurement probe (100) includes a pressure sensor (112) formed of a single-crystal material and mounted to a first metallic process fluid barrier (130) and disposed for direct contact with a process fluid. The pressure sensor (112) has an electrical characteristic that varies with process fluid pressure. A feedthrough (122) is formed of a single-crystal material and has a plurality of conductors extending from a first end to a second end. The feedthrough (122) is mounted to a second metallic process fluid barrier (116) and is spaced from, but electrically coupled to, the pressure sensor (112). The pressure sensor (112) and the feedthrough (122) are mounted such that the secondary metallic process fluid barrier (116) is isolated from process fluid by the first metallic process fluid barrier (116).
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公开(公告)号：IN2873DEN2012A
公开(公告)日：2015-07-24
申请号：IN2873DEN2012
申请日：2012-04-03
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C
IPC: G01L7/08
Abstract: A process transmitter for measuring a process variable in an industrial process comprises a gauge pressure sensor, an excitation source and transmitter circuitry. The gauge pressure sensor measures a pressure difference between a process fluid and a reference volume, and generates a pressure sensor signal representing the pressure difference. The excitation source generates a pressure pulse within the reference volume to influence generation of the pressure sensor signal. The transmitter circuitry is connected to the gauge pressure sensor to provide an output related to a change in the pressure sensor signal due to the pressure pulse.
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公开(公告)号：AU2012333208B2
公开(公告)日：2015-03-05
申请号：AU2012333208
申请日：2012-06-20
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C , BRODEN DAVID A
Abstract: A coplanar process fluid pressure sensor module (192; 292) is provided. The module includes a coplanar base (194; 294) and a housing body (196; 296). The coplanar base (194; 294) has a pair of process fluid pressure inlets, each having an isolator diaphragm (110). The housing body (196; 296) is coupled to the coplanar base at an interface between the coplanar base (194; 294) and the housing body (196; 296). A differential pressure sensor (140) is operably coupled to the pair of process fluid pressure inlets, and is disposed proximate the coplanar base (194; 294) within the housing body (196; 296).
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公开(公告)号：AU2013300083A1
公开(公告)日：2015-02-05
申请号：AU2013300083
申请日：2013-06-21
Applicant: ROSEMOUNT INC
Inventor： HEDTKE ROBERT C
IPC: G01L27/00
Abstract: A method (150) of verifying a condition of a single-crystal pressure sensor (100) is provided. The method (150) includes providing a single-crystal pressure sensor (100) that has at least one electrical characteristic that varies with applied pressure being coupled to a first output and a second output. The pressure sensor (100) also has at least one resistive element therein. A current is applied through the resistive element (122) to heat (152) the pressure sensor (100). At least one output of the pressure sensor (100) is monitored (154) to determine a response of the pressure sensor (100) to current-induced heat. A verification output is provided (156) based on the response.
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