Transducer having redundant pressure sensors

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6029524
SERIAL NO

08889707

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A pressure transducer having a redundant fluid pressure sensor can be used to determine if the pressure transducer needs to be recalibrated. The pressure transducer comprises a fluid pressure sensor for measuring differential pressure. The fluid pressure sensor includes a pair of substantially identical pressure sensors for providing a variable electrical output as a function of a differential fluid pressure and a reference sensor for providing an electrical output independent of the differential fluid pressure. A conditioning circuit is provided for generating a frequency-based signal whose frequency is a function of the electrical output for each fluid pressure sensor. The electrical output of the first and second pressure sensors can be compared to determine whether the pressure transducer needs to be calibrated. In one embodiment, the pressure sensors comprise variable capacitors. The first and second capacitors each have one fixed plate and one movable plate responsive to differential fluid pressure across the movable plate. The reference capacitor has two fixed plates. The first variable, second variable, and reference capacitors are all located in proximity to one another and in communication with the differential fluid pressure. The pressure transducer also includes a switching network connected to the capacitors for selectable connecting at least one of the capacitors to an electronic circuit.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SIEMENS ENERGY & AUTOMATION, INC.ALPHARETTA, GA500
SIEMENS INDUSTRY, INC.ALPHARETTA, GA1240

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Klauder, Philip R Ambler, PA 4 67
Moore, James O Worcester, PA 7 142
O'Brien, Christopher J New Britain, PA 27 268

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MOORE PRODUCTS CO. (1)
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ROSEMOUNT INC. (3)
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THE SCOTT FETZER COMPANY (1)
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THE REGENTS OF THE UNIVERSITY OF MICHIGAN (1)
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SIEMENS AKTIENGESELLSCHAFT (1)
* 4539850 Pressure or pressure-difference measuring apparatus with a pressure sensor device protected against overload 8 1983
 
YOKOGAWA ELECTRIC CORPORATION (1)
* 4644798 Capacitive type converter device 19 1985
 
ADALET/SCOTT FETZER COMPANY (1)
* 4625560 Capacitive digital integrated circuit pressure transducer 25 1985
 
ALLIED-SIGNAL INC. (1)
* 4864463 Capacitive pressure sensor 74 1988
 
GS DEVELOPMENT CORPORATION (1)
* 4542435 Pressure transducer and mounting 21 1984
 
ACACIA PATENT ACQUISITION LLC (1)
* 5431057 Integratable capacitative pressure sensor 36 1994
 
MYCROSENSOR TECHNOLOGIES, LLC (1)
* 4794320 Multi-frequency capacitance sensor 7 1987
 
SP-COMMERCIAL FLIGHT, INC., A DE CORP. (1)
* 4479070 Vibrating quartz diaphragm pressure sensor 45 1983
 
KAVLICO CORPORATION (1)
* 4735098 Dual diaphragm differential pressure transducer 32 1986
 
TOKYO ELECTRON LIMITED (1)
* 5311452 Plasma processing apparatus using capacitance manometer and pressure control method thereof 23 1991
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 6550338 Pressure sensing device 4 2000
 
Emerson Process Management (2)
7412893 Redundant mechanical and electronic remote seal system 4 2006
* 2007/0220,985 Redundant mechanical and electronic remote seal system 5 2006
 
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (1)
7043960 Self-calibrating pressure transducer 12 2004
 
Appside Co., Ltd. (2)
* 7395721 Force sensor, force detection system and force detection program 5 2004
* 2005/0252,303 Force sensor, force detection system and force detection program 4 2004
 
MICRONAS GMBH (1)
* 6425289 Capacitive sensor 21 1999
 
ENDRESS + HAUSER GMBH + CO. KG (2)
* 9470773 Method for operating an absolute, or relative, pressure sensor having a capacitive transducer 0 2012
* 2014/0144,206 METHOD FOR OPERATING AN ABSOLUTE, OR RELATIVE, PRESSURE SENSOR HAVING A CAPACITIVE TRANSDUCER 0 2012
 
DEPUY SYNTHES PRODUCTS, LLC (1)
8393222 Apparatus and method for minimizing drift of a piezo-resistive pressure sensor due to progressive release of mechanical stress over time 3 2010
 
YOKOGAWA ELECTRIC CORPORATION (2)
* 6979995 Frequency measuring circuit and resonant pressure sensor type differential pressure/pressure transmitter using the frequency measuring unit 5 2003
* 2004/0075,425 Frequency measuring circuit and resonant pressure sensor type differential pressure/pressure transmitter using the frequency measuring unit 9 2003
 
YAMATAKE CORPORATION (2)
* 7013735 Pressure sensor 3 2002
* 2004/0187,588 Pressure sensor 2 2004
 
EMERSON NETWORK POWER CO., LTD. (1)
* 2005/0073,860 Power factor correcting circuit for uninterrupted power supply 5 2003
 
Veris Industries, LLC (14)
* 7352287 Pneumatic controller 16 2006
8692540 Split core status indicator 2 2008
7902992 Status indicator 5 2008
7855655 Current switch with automatic calibration 6 2008
* 2009/0115,403 Split core status indicator 11 2008
* 2009/0115,620 Current switch with automatic calibration 16 2008
8212548 Branch meter with configurable sensor strip arrangement 7 2009
8421443 Branch current monitor with calibration 7 2009
8421639 Branch current monitor with an alarm 7 2009
9335352 Branch circuit monitor power measurement 1 2010
9146264 Current meter with on board memory 0 2012
9329996 Branch circuit monitor with paging register 0 2012
9250308 Simplified energy meter configuration 0 2012
9410552 Current switch with automatic calibration 0 2012
 
DENSO CORPORATION (1)
* 6744258 Capacitive sensor apparatus 39 2002
 
MKS INSTRUMENTS, INC. (13)
6993973 Contaminant deposition control baffle for a capacitive pressure transducer 5 2003
* 2004/0226,382 CONTAMINANT DEPOSITION CONTROL BAFFLE FOR A CAPACITIVE PRESSURE TRANSDUCER 0 2003
7201057 High-temperature reduced size manometer 3 2004
* 2006/0070,447 High-temperature reduced size manometer 1 2004
7141447 Method of forming a seal between a housing and a diaphragm of a capacitance sensor 2 2004
7137301 Method and apparatus for forming a reference pressure within a chamber of a capacitance sensor 6 2004
7284439 Method for producing a pressure sensor for detecting small pressure differences and low pressures 8 2004
7204150 Turbo sump for use with capacitive pressure sensor 1 2005
7389697 Pressure sensor for detecting small pressure differences and low pressures 5 2005
* 2006/0000,289 Pressure sensor for detecting small pressure differences and low pressures 2 2005
7624643 Method and apparatus for forming a reference pressure within a chamber of a capacitance sensor 5 2006
* 2007/0023,140 Method and apparatus for forming a reference pressure within a chamber of a capacitance sensor 1 2006
7316163 Method of forming a seal between a housing and a diaphragm of a capacitance sensor 6 2006
 
CODMAN NEURO SCIENCES SARL (1)
8631708 Apparatus and method for minimizing drift of a piezo-resistive pressure sensor due to the progressive release of mechanical stress over time 0 2013
 
Freyssinet International (STUP) (1)
* 2002/0113,231 Method for demounting a prestressing cable, and device for carrying it out 0 2001
* Cited By Examiner