Measuring and testing – Gas analysis – Detector detail
Patent
1998-03-27
1999-11-23
Larkin, Daniel S.
Measuring and testing
Gas analysis
Detector detail
73 232, G01N 2712
Patent
active
059879645
ABSTRACT:
A gas detection circuit for use in selectively detecting a predetermined gas has a plurality of gas sensors coupled to a sensor measuring circuit. Each gas sensor has a different response to the predetermined gas at a predetermined concentration. The sensor measuring circuit measures a conditioned state of each gas sensor and transmits the measurements to a cross checking circuit which determines whether the conditioned state of each gas sensor is within a corresponding window of upper and lower limit values thereby indicating the possible presence of the predetermined gas by the corresponding gas sensor. Following the testing of the conditioned state of each gas sensor, the cross checking circuit transmits a signal indicating which of the gas sensors indicates the possible presence of the predetermined gas and if all sensors are within corresponding windows, representing detection of the gas, another signal is transmitted to trigger an alarm or other warning system.
REFERENCES:
patent: 4327054 (1982-04-01), Yasuda et al.
patent: 4377944 (1983-03-01), Hishii et al.
patent: 4457161 (1984-07-01), Iwanaga et al.
patent: 4542640 (1985-09-01), Clifford
patent: 4586143 (1986-04-01), Kaneyasu et al.
patent: 4638443 (1987-01-01), Kaneyasu et al.
patent: 4670405 (1987-06-01), Stetter et al.
patent: 4907441 (1990-03-01), Shurmer
patent: 5025653 (1991-06-01), Schuldt
patent: 5298783 (1994-03-01), Wu
patent: 5305231 (1994-04-01), Coppler et al.
patent: 5415760 (1995-05-01), Hitomi et al.
patent: 5426934 (1995-06-01), Hunt et al.
Larkin Daniel S.
Simon Fraser University
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