Redundant self compensating leadless pressure sensor

Details Redundant self compensating leadless pressure sensor Redundant self compensating leadless pressure sensor

2011-01-11

2011-01-11

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S727000

Reexamination Certificate

active

07866215

ABSTRACT:
There is disclosed a redundant pressure sensing chip which includes first and second redundant devices. Each pressure sensing device produces an output proportional to applied pressure irrespective of vibration/acceleration of the device. Each device also provides an output proportional to pressure and because of the nature of the devices, thermal effects as well as acceleration and the vibration are canceled. Based on chip operation and subtracting the signals from the two diaphragms, acceleration/vibration is canceled but also the effects of absolute pressure and differential pressure is also canceled. Therefore the chip can be used as a redundant absolute pressure sensor as well as a differential pressure sensor.

REFERENCES:
patent: 6293164 (2001-09-01), Kurtz
patent: 7057247 (2006-06-01), Kurtz et al.
patent: 7178403 (2007-02-01), Kurtz
patent: 7647836 (2010-01-01), O'Brien et al.
patent: 2006/0144153 (2006-07-01), Brosh

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