Boots – shoes – and leggings
Patent
1991-11-20
1993-08-17
Black, Thomas G.
Boots, shoes, and leggings
340578, G08B 1712, G06F 1574
Patent
active
052375129
ABSTRACT:
An apparatus and method for sensing electro-magnetic radiation and analysing the resultant electrical signal waveform, in order to determine whether the radiation originates from a fire condition, monitors variations in the signal waveform over a predetermined period of time. The amplitudes of the successive transitions in the waveform and the elapsed time between the transitions are measured. Two two-dimensional matrices are produced. The first of these is made up of a plurality of co-ordinate points each corresponding to a respective pair of successively occurring signal transitions. The position of each such point in the matrix is dependent on the respective amplitudes of the two transitions making up each pair. The second matrix is also made up of a plurality of co-ordinate points each corresponding to a respective pair of the signal transitions. In the second matrix, however, the position of each point within the matrix depends on the amplitude excursion and the elapsed time between the two transitions of each pair. The matrices thus produced are compared with predetermined matrices corresponding, for example, to predetermined fire conditions or false alarm conditions, whereby to determine whether the sensed radiation has a pattern corresponding to a fire or a false alarm situation.
REFERENCES:
patent: 4152642 (1979-05-01), Doherty
patent: 4495585 (1985-01-01), Buckley
patent: 4566073 (1986-01-01), Zwicke
patent: 4783833 (1988-11-01), Kawabata et al.
patent: 4796205 (1989-01-01), Ishii et al.
patent: 4797936 (1989-01-01), Nakatsugawa et al.
patent: 4800285 (1989-01-01), Akiba et al.
patent: 4803469 (1989-02-01), Matsushita
patent: 4884222 (1989-11-01), Nagashima et al.
patent: 4904986 (1990-02-01), Pinckaers
patent: 4907281 (1990-03-01), Hirvonen et al.
patent: 4924417 (1990-05-01), Yuasa
patent: 4951234 (1990-08-01), Bellows
patent: 4970660 (1990-11-01), Marchant
patent: 4983853 (1991-01-01), Davall et al.
patent: 5006710 (1991-04-01), Powell
Black Thomas G.
Detector Electronics Corporation
Zanelli Michael
LandOfFree
Signal recognition and classification for identifying a fire does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal recognition and classification for identifying a fire, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal recognition and classification for identifying a fire will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2249534