Self-monitoring pressure detection apparatus and method

Details Self-monitoring pressure detection apparatus and method Self-monitoring pressure detection apparatus and method

1996-07-24

1998-08-11

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

7351433, 73728, 324500, 324537, 340626, 340665, 340669, G08B 2100

Patent

active

057932972

ABSTRACT:
A pressure detection apparatus including a pressure detection diaphragm, pressure detection circuit for outputting a pressure detection signal proportional to a pressure applied to the pressure detection diaphragm and clamping circuit for clamping the pressure detection signal to a predefined maximum or minimum value when the detected pressure signal is larger than the maximum value or less than the minimum value. Signal clamping by the clamping circuit is cut-off or cancelled when the pressure applied to the pressure detection diaphragm causes an operational error. This operational error may be detected by forming part of the clamping circuit on a semiconductor diaphragm of the sensor. Also, a failure detection circuit may be used to detect sensor failure and then cancel signal clamping.

REFERENCES:
patent: 4712098 (1987-12-01), Laing
patent: 5578993 (1996-11-01), Sitabkhan et al.
patent: 5583490 (1996-12-01), Santos et al.

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