Dual sensor system having fault detection capability

Details Dual sensor system having fault detection capability Dual sensor system having fault detection capability

2007-11-19

2010-12-21

He, Amy (Department: 2831)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C702S058000

Reexamination Certificate

active

07855562

ABSTRACT:
A sensor system (20) includes transducers (32, 34) each yielding an analog signal (37, 39) representing a parameter independently sensed by each of the transducers (32, 34). The signals (37, 39) are summed and the resulting transducer signal (46) is converted to a digital transducer signal (26) by a high resolution analog-to-digital converter (ADC) (48). Concurrently, one of the signals (37, 39) is subtracted from the other. The resulting difference signal (56) is converted to a digital difference signal (60) by a low resolution ADC (58). When the digital difference signal (60) is within a threshold window (78), a fault signal (28) indicates a normal condition (80) of the transducers (32, 34). When the signal (60) falls outside of the threshold window (78), a fault signal (28) indicates a fault condition (82) of the transducers. The transducer and fault signals (26, 28) are concurrently output from the sensor system (20).

REFERENCES:
patent: 6016465 (2000-01-01), Kelly
patent: 6704682 (2004-03-01), Summers et al.
patent: 6831466 (2004-12-01), Down et al.
patent: 7136729 (2006-11-01), Salman et al.
patent: 7200469 (2007-04-01), Katrak et al.

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