Flame detecting and alarming system with ultraviolet sensor

Details Flame detecting and alarming system with ultraviolet sensor Flame detecting and alarming system with ultraviolet sensor

1991-06-05

1993-02-23

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

250372, G08B 1712

Patent

active

051893983

ABSTRACT:
A flame detecting and alarm system has a ultraviolet radiation sensor (UV sensor) which detects ultraviolet radiation and outputs sensor output pulses. The spacings of the sensor output pulses represent amounts of energy of the ultraviolet radiation detected by the UV sensor. Each pulse spacing of the sensor output pulses is measured, and the pulses are regarded as "continuous" if the pulse spacings are less than a predetermined time period. The presence of a predetermined number of "continuous" sensor output pulses is interpreted as a recognition of a flame, and an alarm is activated.

REFERENCES:
patent: 4016424 (1977-04-01), Traina
patent: 4247848 (1981-01-01), Kitta et al.
patent: 4328527 (1982-05-01), Landis
patent: 4455487 (1984-06-01), Wendt
patent: 4736105 (1988-04-01), Fonnesbeck
patent: 4975683 (1990-12-01), Parsons et al.
patent: 4988884 (1991-01-01), Dunbar et al.

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