Scattered radiation smoke detector

Details Scattered radiation smoke detector Scattered radiation smoke detector

1984-04-16

1987-02-10

Wan, Gene

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250564, G01N 2153

Patent

active

046424717

DESCRIPTION:

BRIEF SUMMARY
CROSS REFERENCE TO RELATED CASE

This application is related to the commonly assigned, copending U.S. application Ser. No. 06/606,827, filed Apr. 16, 1984, entitled "PHOTOELECTRIC SMOKE DETECTOR AND IT'S APPLICATION", and listing as the inventor HANNES GUTTINGER et al.
The present invention broadly relates to a smoke detection systems and, more specifically, pertains to a new and improved scattered radiation smoke detector.
Generally speaking, the smoke detection system of the present invention employs a scattered radiation smoke detector for generating an alarm signal in response to detection of smoke and comprises an electronic evaluation circuit. The electronic evaluation circuit comprises means for generating the alarm signal in response to electromagnetic radiation scattered by smoke and also comprises means for emitting electromagnetic radiation. At least one radiation conducting element conducts the scattered radiation smoke detector to the evaluation circuit. The electromagnetic radiation emitted by the electronic evaluation circuit is radiated into a measuring volume. At least one radiation conducting element is provided through which said electromagnetic radiation is radiated into said measuring volume. At least one radiation conducting element is provided by which the electromagnetic radiation scattered from smoke particles in the measuring volume is received and transmitted back to the electronic evaluation circuit.
In other words, the smoke detection system of the present invention is of the type comprising a scattered radiation smoke detector containing a measuring volume, an evaluation circuit having means for emitting electromagnetic radiation as well as means for generating an alarm signal upon detecting presence of smoke in the measuring volume and at least one optical conductor pair connecting the evaluation circuit to the scattered radiation smoke detector.
In a further embodiment, the present invention relates to a scattered radiation smoke detector comprising an electronic evaluation circuit and a plurality of electromagnetic radiation conducting elements for connecting the electronic evaluation circuit to the smoke detector. The electronic evaluation circuit comprises means for emitting electromagnetic radiation. The scattered radiation smoke detector also comprises a measuring volume. At least one first electromagnetic radiation conductor of the plurality of electromagnetic radiation conductors serves for radiating the electromagnetic radiation emitted by the means into the measuring volume and at least one second electromagnetic radiation conducting element of the plurality of electromagnetic radiation conducting elements serves for receiving and conducting back to the electronic evaluation circuit electromagnetic radiation scattered by smoke particles in the measuring volume.
The invention relates to a scattered radiation smoke detector which can be connected to an evaluation unit by means of radiation conducting elements and in which the electromagnetic radiation transmitted from the evaluation unit is beamed into a measuring volume through at least one radiation conductive element and electromagnetic radiation scattered by smoke particles in the measuring volume are received by at least one radiation conducting element and transmitted back to the evaluation unit.
In heretofore known scattered radiation smoke detectors, such as are known from U.S. Pat. No. 4,181,439 or Patent Cooperation Treaty Application WO No. 80/01326, electromagnetic radiation, which is to be understood to include visible light, infrared radiation or ultraviolet radiation, is radiated into an extensive measuring volume by a light emitting diode (LED) disposed in the interior of the smoke detector and radiation scattered by smoke particles in the direction of a solar cell also disposed in the interior of the smoke detector is received by the solar cell.
For voltage supply and signal transmission the smoke detector is connected to an evaluation unit or central signal station by means of electrically conductive

REFERENCES:
patent: 4397557 (1983-08-01), Herwig et al.

Affiliated with

Also associated with

Rating

Scattered radiation smoke detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scattered radiation smoke detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scattered radiation smoke detector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2364152