The present invention discloses a fire-resistant sealing unit installed adjacent to a penetration part penetrating a partition wall inside a building, and filling the penetration part with fire-resistant sealing by heat generated in case of a fire in the building; a fire sensing unit installed adjacent to a fire-resistant sealing unit to detect whether a fire has occurred in a compartment area; and a control server that divides the inside of the building into predetermined conceptualized compartments, manages them as conceptualized compartmental areas, detects fire occurrence information from a fire sensing unit for each compartmental area, and calculates fire vector information.

Devices, systems, and methods for providing smoke detectors are described herein. One smoke detector of a fire sensing system includes a circuit board body, having a set of front scattering emitting light sources located on one side of an optical chamber, a receiver of front scattering light beams from the front scattering emitting light sources and backward scattering light beams, and a set of backward scattering emitting light sources located between the set of front scattering emitting light sources and the receiver, the backward scattering light beams emitted from the backward scattering emitters.

A method of calibrating an optical detector includes affixing a calibration material to a first surface of the optical detector and calibrating one or more parameters of the optical detector using the calibration material.

A method of calibrating an optical detector includes affixing a calibration material to a first surface of the optical detector and calibrating one or more parameters of the optical detector using the calibration material.

The optical detector of a value of an atmospheric physical quantity representative of a danger includes: a measurement chamber accessible to the atmosphere; an electronics compartment for receiving electronics for detecting the value of the atmospheric physical quantity representative of a danger, the detecting electronics including electronic elements comprising at least: a light emitter, a light receiver that is sensitive to at least some of the wavelengths of the light rays emitted by the emitter, and electronics for processing detection signals,
the detector in addition including: a first light guide facing the emitter in order to direct the light emitted by the emitter from the electronics compartment to a detecting zone in the measurement chamber; and a second light guide facing the receiver in order to direct light originating from said detecting zone to the electronics compartment in order to be received by the receiver, the amount of light received by the receiver being representative of the presence/absence in the detecting zone of said physical-quantity value representative of a danger.

The electronics compartment is separated from the measurement chamber, and isolates all of the electronic elements that it contains from the atmosphere and the light guides are arranged to penetrate the electronics compartment in a way that is seal-tight to the atmosphere.

The optical detector of a value of an atmospheric physical quantity representative of a danger includes: a measurement chamber accessible to the atmosphere; an electronics compartment for receiving electronics for detecting the value of the atmospheric physical quantity representative of a danger, the detecting electronics including electronic elements comprising at least: a light emitter, a light receiver that is sensitive to at least some of the wavelengths of the light rays emitted by the emitter, and electronics for processing detection signals,
the detector in addition including: a first light guide facing the emitter in order to direct the light emitted by the emitter from the electronics compartment to a detecting zone in the measurement chamber; and a second light guide facing the receiver in order to direct light originating from said detecting zone to the electronics compartment in order to be received by the receiver, the amount of light received by the receiver being representative of the presence/absence in the detecting zone of said physical-quantity value representative of a danger.

The electronics compartment is separated from the measurement chamber, and isolates all of the electronic elements that it contains from the atmosphere and the light guides are arranged to penetrate the electronics compartment in a way that is seal-tight to the atmosphere.

There is provided a smoke detector including a light source, a reflective surface, a light sensor and a processor. The light sensor receives reflected light when the light source emits light toward the reflective surface, and generates a reference detection signal when there is no smoke. The processor receives the detection signal from the light sensor, and automatically selects a set of predetermined condition thresholds according to a profile of the detection signal to be compared with the detection signal thereby determining whether to generate an alarm according to the comparison result.

There is provided a smoke detector including a light source, a reflective surface, a light sensor and a processor. The light sensor receives reflected light when the light source emits light toward the reflective surface, and generates a reference detection signal when there is no smoke. The processor receives the detection signal from the light sensor, and automatically selects a set of predetermined condition thresholds according to a profile of the detection signal to be compared with the detection signal thereby determining whether to generate an alarm according to the comparison result.

Provided is an apparatus for detecting smoke based on polarization. The apparatus includes a chamber into which smoke is introduced, a detection unit comprising a light-emitting unit configured to emit light beams having a plurality of different wavelengths into a space in the chamber, and a light-receiving unit configured to receive scattered light from a plurality of light sources, a control unit configured to control an operation of the detection unit, and a fire determination unit configured to distinguish between fire smoke and non-fire analogous smoke by detecting and analyzing a light-receiving signal received by the light-receiving unit, in which horizontal polarization and vertical polarization are applied to the plurality of light sources of the light-emitting unit and the light-receiving unit.

Provided is an apparatus for detecting smoke based on polarization. The apparatus includes a chamber into which smoke is introduced, a detection unit comprising a light-emitting unit configured to emit light beams having a plurality of different wavelengths into a space in the chamber, and a light-receiving unit configured to receive scattered light from a plurality of light sources, a control unit configured to control an operation of the detection unit, and a fire determination unit configured to distinguish between fire smoke and non-fire analogous smoke by detecting and analyzing a light-receiving signal received by the light-receiving unit, in which horizontal polarization and vertical polarization are applied to the plurality of light sources of the light-emitting unit and the light-receiving unit.