System for verifying detection of a fire event condition
First Claim
1. A system for verifying the detection of a fire event condition for use with a fire detection device having multiple air condition sensors, said system comprising:
- an alarm;
a programmable logic circuit capable of evaluating input data supplied thereto by the air condition sensors indicative of respective ambient air conditions, said logic circuit including means for generating an output signal to energize said alarm;
wherein said logic circuit includes a plurality of predetermined threshold parameters corresponding to ambient air conditions indicative of respective fire event conditions;
a power source electrically connected to said alarm and said logic circuit; and
wherein said logic circuit includes means for comparing said input data to respective threshold parameters, said logic circuit decreasing said threshold parameters other than a particular threshold parameter when said input data is at an undesirable relationship with respect to said particular threshold parameter.
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Accused Products
Abstract
A system for verifying the detection of a fire event by a fire detection device utilizing multiple air condition sensors includes a programmable logic circuit that evaluates whether input data supplied thereto by the sensors satisfies predetermined threshold parameters. If the input data matches one particular parameter, the other threshold parameters are decreased and evaluation frequency is increased. The circuit energizes an alarm if input data from the sensors satisfies the particular parameter and at least one of the decreased parameters or if the input data satisfies at least two non-decreased parameters. Therefore, a fire event sensed by one sensor is verified by another sensor before causing an alarm. At power-up, the circuit compares initial input data with the predetermined parameters and modifies the parameters if the input data is within respective predetermined ranges. This also decreases false alarms.
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Citations
20 Claims
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1. A system for verifying the detection of a fire event condition for use with a fire detection device having multiple air condition sensors, said system comprising:
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an alarm;
a programmable logic circuit capable of evaluating input data supplied thereto by the air condition sensors indicative of respective ambient air conditions, said logic circuit including means for generating an output signal to energize said alarm;
wherein said logic circuit includes a plurality of predetermined threshold parameters corresponding to ambient air conditions indicative of respective fire event conditions;
a power source electrically connected to said alarm and said logic circuit; and
wherein said logic circuit includes means for comparing said input data to respective threshold parameters, said logic circuit decreasing said threshold parameters other than a particular threshold parameter when said input data is at an undesirable relationship with respect to said particular threshold parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for verifying the accuracy of detection of a fire event condition by a fire detection device utilizing multiple air condition sensors, said method comprising:
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providing an alarm;
providing a programmable logic circuit;
providing a power source for said alarm and programmable logic circuit;
demanding from the air condition sensors in the fire detection device input data indicative of respective ambient air conditions;
providing said input data to said logic circuit for comparison with a plurality of predetermined threshold parameters;
if said input data is at an undesirable relationship with a particular threshold parameter, decreasing said threshold parameters other than said particular threshold parameter; and
energizing said alarm if said input data is at an undesirable relationship with said particular threshold parameter and at least one of said decreased threshold parameters. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for verifying and improving the accuracy of detection of a fire event by a fire detection device utilizing multiple air condition sensors, said method comprising:
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providing an alarm;
providing a programmable logic circuit;
providing a power source for said alarm and programmable logic circuit;
demanding at initial power-up from the air condition sensors in the fire detection device initial input data indicative of respective ambient air conditions;
providing said initial input data to said logic circuit for comparison with a plurality of predetermined threshold parameters; and
if said initial input data is at a predetermined relationship with regard to said respective threshold parameters, utilizing said logic circuit to modify said respective threshold parameters. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification