US Patent No: 5,343,755

Number of patents in Portfolio can not be more than 2000

Strain gage sensor with integral temperature signal

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Importance

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Abstract

A strain gage pressure sensor having a resistive bridge circuit from which is measured both the applied pressure and the temperature of the pressure sensor. A constant voltage is provided across the bridge circuit such that any temperature caused changes in the resistance of the bridge circuit are reflected in the flow of a bridge current through the bridge circuit. A sense resistor is electrically coupled to the bridge circuit such that any change in the bridge current causes a change in the voltage drop across the sense resistor. The voltage drop and the pressure output signal are digitized and suitably processed resulting in a highly accurate, corrected pressure output for use with suitable pressure instrumentation.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ROSEMOUNT INC.EDEN PRAIRIE, MN700

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huss, Charles G Shakopee, MN 7 77

Cited Art

Patent Info (Count) # Cites Year
 
HITACHI, LTD. (3)
4,233,848 Strain gauge pressure transducer apparatus having an improved impedance bridge 22 1978
4,813,272 Semiconductor pressure sensor 27 1987
4,911,016 Semiconductor strain gauge bridge circuit 26 1989
 
TOKYO ELECTRIC CO., LTD. (2)
4,432,247 Load cell having thin film strain gauges 34 1981
4,633,721 Load cell having a thin film strain-inducible element 12 1985
 
ARGON MEDICAL DEVICES, INC. (1)
5,146,788 Apparatus and method for a temperature compensation of a catheter tip pressure transducer 23 1990
 
FUJI ELECTRIC CO., LTD. (1)
5,042,307 Amplifying compensation circuit for semiconductor 22 1990
 
GOULD INC. (1)
4,299,130 Thin film strain gage apparatus with unstrained temperature compensation resistances 20 1979
 
GULTON-STATHAM TRANSDUCERS, INC., A DELAWARE CORPORATION (1)
4,462,018 Semiconductor strain gauge with integral compensation resistors 30 1982
 
HONEYWELL INC. (1)
5,187,985 Amplified pressure transducer 21 1991
 
ITT CORPORATION (1)
4,202,218 Bridge circuit 26 1978
 
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO (1)
4,576,052 Semiconductor transducer 35 1984
 
KELLER AG FUR DRUCKMESSTECNIK (1)
4,715,003 Method for temperature compensation and measuring circuit therefor 61 1985
 
MOTOROLA, INC. (1)
4,798,093 Apparatus for sensor compensation 19 1986
 
NIPPON SOKEN, INC. (1)
5,024,101 Power source circuit and bridge type measuring device with output compensating circuit utilizing the same 22 1990
 
PLEVY; ARTHUR L. (1)
4,414,837 Apparatus and methods for the shunt calibration of semiconductor strain gage bridges 8 1982
 
ROSEMOUNT INC. (1)
4,777,826 Twin film strain gauge system 47 1987
 
SIEMENS AKTIENGESELLSCHAFT (1)
4,667,516 Circuit arrangement for compensating for the temperature dependence of the sensitivity and the null point of a piezoresistive pressure sensor 22 1986
 
TEMIC AUTOMOTIVE OF NORTH AMERICA, INC. (1)
4,800,513 Auto-calibrated sensor system 28 1986
 
THE LAITRAM CORPORATION (1)
4,276,776 Temperature/pressure transducer 4 1980
 
TOKYO SHIBAURA DENKI KABUSHIKI KAISHA (1)
4,300,395 Semiconductor pressure detection device 25 1979

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
MKS INSTRUMENTS, INC. (8)
6,439,056 Sensor element having temperature measuring means 20 1999
7,201,057 High-temperature reduced size manometer 2 2004
7,141,447 Method of forming a seal between a housing and a diaphragm of a capacitance sensor 1 2004
7,284,439 Method for producing a pressure sensor for detecting small pressure differences and low pressures 2 2004
7,204,150 Turbo sump for use with capacitive pressure sensor 1 2005
7,389,697 Pressure sensor for detecting small pressure differences and low pressures 0 2005
7,624,643 Method and apparatus for forming a reference pressure within a chamber of a capacitance sensor 1 2006
7,316,163 Method of forming a seal between a housing and a diaphragm of a capacitance sensor 3 2006
 
SIEMENS VDO AUTOMOTIVE CORPORATION (2)
7,082,360 Method and system for determining weight and position of a vehicle seat occupant 4 2001
7,024,295 Method and system for determining weight and position of a vehicle seat occupant 3 2005
 
DENSO CORPORATION (1)
6,973,836 Semiconductor pressure sensor having diaphragm 6 2004
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6,101,883 Semiconductor pressure sensor including a resistive element which compensates for the effects of temperature on a reference voltage and a pressure sensor 5 1997
 
ROSEMOUNT AEROSPACE INC. (1)
6,433,524 Resistive bridge interface circuit 2 2001
 
SCHLUMBERGER TECHNOLOGY CORPORATION (1)
5,394,345 Method and apparatus for correcting a pressure measurement for the influence of temperature 20 1994