Signaling fire detector

• US 6,696,939 B2
• Filed: 09/14/2000
• Issued: 02/24/2004
• Est. Priority Date: 10/02/1998
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Schneider, Joachim, Oppelt, Ulrich, Hensel, Andreas, Pfefferseder, Anton
• Primary Examiner(s): POPE, DARYL C
• Application Number:
  US09/555,691
• Publication Number:
  US 20030201899A1
• Time in Patent Office: 1,258 Days
• Field of Search: 340/500, 340/506, 340/511, 340/517, 340/518, 340/521, 340/522, 340/628, 340/578, 340/629, 340/3.1, 73/310.5
• US Class Current: 340/500
• CPC Class Codes: G08B 17/10 Actuation by presence of smoke or gases , e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means

Abstract

A fire detector having a sensor group containing at least one fire detection sensor and having a control and evaluation unit, which is connected to a sensor group that is set up to evaluate signals supplied by the at least one fire detection sensor, and if necessary, that is also set up to output at least one control signal for the at least one fire detection sensor. The sensor group includes one of a chemosensor and a chemosensor array, which is connected to the control and evaluation unit for evaluating a detection signal of the one of the chemosensor and the chemosensor array, and which is set up based on a chemical sensor-operation principle to detect gas emissions and/or smoke emissions associated with a fire. The additional chemosensor may be an optoelectronic gas sensor functioning on an optode basis or an optoelectronic gas sensor array functioning on an optode basis.

Claims

1. A fire detector comprising:

a sensor group having at least one fire detection sensor; and

a control and evaluation unit connected to the sensor group evaluating signals of the at least one fire detection sensor and for outputting at least one control signal for the at least one fire detection sensor;

wherein the sensor group includes a chemosensor, the chemosensor including one of an optoelectronic gas sensor functioning on an optode basis and an optoelectronic gas sensor array functioning on an optode basis, the sensor group being connected to the control and evaluation unit for evaluating a detection signal of the chemosensor, a chemical sensor-operation of the sensor group being used to detect at least one of combustion gas emissions and smoke emissions associated with a fire.

2. The fire detector of claim 1, wherein the at least one fire detection is one fire detection sensor that is one of a scattered-light sensor, an ionization sensor and a temperature sensor.

3. The fire detector of claim 1, wherein the at least one fire detection is two fire detection sensors.

4. The fire detector of claim 3, wherein the two fire detection sensors are a temperature sensor and one of a scattered-light sensor and an ionization sensor.

5. The fire detector of claim 1, wherein the control and evaluation unit includes a microprocessor and an analog-digital converter for converting detection signals supplied by the sensor group into corresponding digital signals.

6. The fire detector of claim 5, wherein the control and evaluation unit is coupled via a bus interface to a bus system, the fire detector communicating with one of a primary system and a master system through the bus system.

7. The fire detector of claim 1, wherein the chemosensor includes at least one indicator substance having at least one chemical group selected from the group of azobenzol, acetophenone, corine, porphyrin, phthalocyanine, macrolide, porphyrinogene, nonactin, valinomycin, triphenylmethane, diphenylmethane, anthracene, anthraquinone and oxazole compounds.