Boots – shoes – and leggings
Patent
1990-08-30
1993-11-30
Harvey, Jack B.
Boots, shoes, and leggings
364550, 34082536, 340589, 395900, G08B 1700
Patent
active
052671801
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a fire alarm system for obtaining at least one piece of fire information such as a fire likelihood ratio, degree or level of danger on the basis of detected information or data related to physical quantities of fire phenomena such as smoke, heat, gases and others and/or environmental data such as the size of room, the number of occupants, ambient temperature and others.
BACKGROUND TECHNOLOGY
There are a variety of methods known for detecting the occurrence of fires. By way of example, one of the simplest methods entails discriminating the occurrence of a fire on the basis of a sensor level, i.e. detection data of a fire detector, wherein a fire signal is output when the sensor level exceeds a certain predetermined level. In this case, although the fire signal is output from the fire detector depending on whether or not the detection signal exceeds the predetermined level, various environmental conditions are not fully taken into account. In this connection, it is conceivable that the environmental information may be collected in addition to the detected information from the fire detector, wherein the fire discrimination is synthetically made on the basis of both the detection information and the environmental information. However, the environmental conditions are intrinsically ambiguous and consideration thereof in the fire discrimination can not always assure a sufficiently high reliability of a correct generation of the fire signal. In actuality, there frequently arise situations in which a phenomenon other than a fire triggers generation of a fire signal.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to ensure a highly improved accuracy in making the fire decision by processing the collected information or data inclusive of the environmental data by a method which can assure a higher reliability than the methods known heretofore.
In view of the above object, there is provided according to a first mode for carrying out the invention a fire alarm system for obtaining the fire information on the basis of various data concerning fire phenomena, characterized in that the system comprises
data acquisition means (steps 305, 306, 310, 312) for acquiring various data to be collected concerning the fire phenomena and data to be processed from the collected data,
definition means (ROM14, ROM15) for defining functions for the fire information for each piece of data obtained through the data acquisition means and at least one rule for processing to be performed by using the abovementioned function, and
processing means (steps 314, 316, 318) for obtaining the fire information by processing the data obtained through the data acquisition means on the basis of the abovementioned processing rules and the corresponding functions employed in the processing rules to thereby obtain a function value for each of the processings and by determining a centroid of the function values thus obtained (step 326).
The information or data related to the fire phenomena and obtained through the data acquisition means includes not only the detection information of the physical quantities intrinsic to a fire phenomenon but also various environmental information or data such as the size of a room, the ambient temperature and others which exert influences on the detection information as well as so-called processed information such as changes in detection information as a function of time, integrated values thereof and the like.
The definition means which may be constituted, for example, by storage means which defines and stores therein the functions concerning the acquired data vis-a-vis fire information for every piece of data obtained by the data acquisition means in the form of formulae, tables or the like and additionally at least one (usually a plurality of) processing rule as to which of the acquired pieces of data vis-a-vis fire information function (one or more functions) is to be adopted in the data processing.
On the other hand, the processing m
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Harvey Jack B.
Nohmi Bosai Kabushiki Kaisha
Pipala Edward J.
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