Gas detecting method and system

Details Gas detecting method and system Gas detecting method and system

1989-05-19

1992-02-18

Lacey, David L.

Measuring and testing

Gas analysis

With compensation detail

73 233, 73 2331, 73 2334, 73 2335, 73 3101, 73 3102, 73 3103, 123489, 128719, 236 493, 422 90, 422 94, 422 95, 422 96, G01N 2704, G01N 2762

Patent

active

050883143

ABSTRACT:
A method of and a system for detecting a gas. A histogram of gas sensor outputs in the past is prepared to determine a gas detection threshold value from the histogram. The threshold value is determined, for example, based on the modal sensor output on the histogram. The threshold value is modified based on the width of distribution on the histogram since the width represents the degree of pollution of the background.

REFERENCES:
patent: 4958513 (1990-09-01), Yasunaga

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