TOBACCO SMOKE DETECTOR, HAZARD DETECTOR, AND METHOD OF DISTINGUISHING TOBACCO SMOKE FROM FIRE SMOKE
First Claim
1. A tobacco smoke detector, comprising:
- a gas-sensitive semiconductor sensor device having a first gas-sensitive layer which reacts to tobacco smoke, and a second gas-sensitive layer which reacts to fire products;
an evaluation unit for analyzing signals supplied by said first and second gas-sensitive layers and for determining whether the tobacco smoke is present; and
an interface for connecting to a hazard detector, a hazard control unit and/or an output device via further signals or data technology, including a transmission of information as to whether the tobacco smoke is present.
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Accused Products
Abstract
A tobacco smoke detector has a gas-sensitive semiconductor sensor device (in particular, GasFET sensor) with a first gas-sensitive layer which reacts to tobacco smoke and a second gas-sensitive layer which reacts to fire products. An evaluation unit (e.g. microchip) analyzes the signals supplied by the first and the second gas-sensitive layer and determines whether tobacco smoke is present. Optionally, the tobacco smoke detector contains an interface for providing a connection using signals or data technology to a hazard detector and/or a hazard control unit and/or an output device, in particular for transmitting information as to whether tobacco smoke is present. Optionally, the tobacco smoke detector can be operationally integrated into a conventional hazard detector (e.g. fire alarm).
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Citations
20 Claims
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1. A tobacco smoke detector, comprising:
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a gas-sensitive semiconductor sensor device having a first gas-sensitive layer which reacts to tobacco smoke, and a second gas-sensitive layer which reacts to fire products; an evaluation unit for analyzing signals supplied by said first and second gas-sensitive layers and for determining whether the tobacco smoke is present; and an interface for connecting to a hazard detector, a hazard control unit and/or an output device via further signals or data technology, including a transmission of information as to whether the tobacco smoke is present. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A hazard detector for detection of hazardous situations in a building, the hazard detector comprising:
a tobacco smoke detector, containing; a gas-sensitive semiconductor sensor device having a first gas-sensitive layer which reacts to tobacco smoke, and a second gas-sensitive layer which reacts to fire products; an evaluation unit for analyzing signals supplied by said first and second gas-sensitive layers and for determining whether the tobacco smoke is present; and an interface for connecting to a hazard control unit and/or an output device via further signals or data technology, including a transmission of information as to whether the tobacco smoke is present. - View Dependent Claims (9, 10)
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11. A hazard detection system, comprising:
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an alarm control unit; a hazard detector; a detector circuit connected to said alarm control unit and said hazard detector; at least one tobacco smoke detector connected to said detector circuit, said at least one tobacco smoke detector, containing; a gas-sensitive semiconductor sensor device having a first gas-sensitive layer which reacts to tobacco smoke, and a second gas-sensitive layer which reacts to fire products; an evaluation unit for analyzing signals supplied by said first and second gas-sensitive layers and for determining whether the tobacco smoke is present; and an interface connected to said hazard detector and said alarm control unit via further signals or data technology, including a transmission of information as to whether the tobacco smoke is present; and a control unit connected to said at least one tobacco smoke detector, said control unit being equipped to analyze the signals from said at least one tobacco smoke detector and, based on the signals, to initiate appropriate measures in an area of a space in which said at least one tobacco smoke detector issuing a signal is disposed. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for distinguishing tobacco smoke and fire smoke, which comprises the steps of:
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recording signals from a first gas-sensitive coating which reacts to tobacco smoke, the first gas-sensitive coating reacting to ammonia; recording additional signals from a second gas-sensitive coating which reacts to fire, the second gas-sensitive coating further reacts to other combustion gas components; and determining, via an evaluation unit, whether the tobacco smoke and/or the fire smoke is present, based on signal patterns supplied by the first and the second gas-sensitive coatings. - View Dependent Claims (18, 19, 20)
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Specification