Abstract: A system for smoke/fire discrimination and identification of the fire source is provided. The system comprises a control unit that is configured to receive data pertaining to gases present in the smoke generated by a burning material and receive data pertaining to temporal characteristics of fire caused by the burning material. The control unit identifies the burning material based on the data pertaining to the one or more gas and the data pertaining to temporal characteristics of fire; and trigger a fire event based on the identified burning material. The control unit identifies and classifies the burning material as one of the known burning materials based on matching of the detected gas and the captured temporal characteristics with the database.

Abstract: An aspirating detection system, a heat-detection device for an aspirating detection system, and a method of determining that a temperature in a monitored environment has exceed a predetermined threshold are provided. An aspirating detection system for monitoring an environment, the system including: an aspirating detector for aspirating and detecting smoke in a sample of air; a sampling pipe or providing a sample of air to the aspirating detector, the sampling pipe at least partially exposed to the monitored environment; and a heat-detection device exposed to the monitored environment and arranged to emit an airborne substance into the sampling pipe when the temperature of the monitored environment exceeds a predetermined threshold; the aspirating detector is arranged to detect the airborne substance and thereby detect that the temperature of the monitored environment exceeds the predetermined threshold.

Abstract: A detector unit for use in an aspirating detection system. The detector unit includes an aspirator for drawing air along at least one sampling pipe and into the detector unit; a sensor chamber for analysing a sample of the air drawn into the detector unit; a Venturi conduit through which the air is moved by the aspirator, the Venturi conduit including a first portion of the Venturi conduit and a second portion of the Venturi conduit, a cross-sectional area of the first portion being smaller than a cross-sectional area of the second portion; a pressure sensor configured to detect a differential pressure between the air in the first portion and the air in the second portion of the Venturi conduit; and a controller configured to determine a leak and/or a blockage in the aspirating detection system based on the detected differential pressure.

Abstract: Aspects of the invention are directed towards a system and method for noise suppression. One or more embodiments of the invention describe the method comprising steps of receiving noise by a microphone and deriving a noise signal from the noise, the noise produced by a fan of a fire/smoke detection unit while drawing air and detecting the speed of the fan of the fire/smoke detection unit. The method further describes steps of amplifying the noise signal by the amplifier received from the microphone and producing an anti-phase noise signal by shifting a phase of the amplified noise signal received from the amplifier wherein the anti-phase noise signal is dependent on the detected speed of the fan. The method further describes steps of outputting the anti-phase noise signal through a speaker to suppress the noise produced by the fan of the fire/smoke detection unit while drawing the air.

Abstract: A smoke detector (100) for use with an aspiration smoke detector (ASD) is described. The smoke detector includes a light source (104) configured to emit a beam of light (108); a reflector (102) including an aperture (110), the aperture aligned with a direction of propagation of the beam of light when no scattering occurs; and a photodetector (106); the reflector configured to reflect light scattered from the beam of light received at the reflector to a single focal point; and the photodetector located at the single focal point. An aspiration smoke detector (ASD) system (2) includes the smoke detector and a method of detecting smoke using the smoke detector.

Abstract: An aspiration smoke detection system for detecting the presence of a fire within a region of interest. The aspiration smoke detection system includes a smoke detection unit for detecting the presence of smoke particles suspended in air; and one or more local sensors located remotely from the smoke detection unit for measuring a property of air from the region of interest that is drawn into the aspiration smoke detection system. An inlet piece includes a sensor for use with the aspiration smoke detection system is also provided. A method of detecting a fire using the aspiration smoke detection system and a method of locating a fire using the aspiration smoke detection system are also provided.

Abstract: An aspirating detection system, a heat-detection device for an aspirating detection system, and a method of determining that a temperature in a monitored environment has exceed a predetermined threshold are provided. An aspirating detection system for monitoring an environment, the system including: an aspirating detector for aspirating and detecting smoke in a sample of air; a sampling pipe or providing a sample of air to the aspirating detector, the sampling pipe at least partially exposed to the monitored environment; and a heat-detection device exposed to the monitored environment and arranged to emit an airborne substance into the sampling pipe when the temperature of the monitored environment exceeds a predetermined threshold; the aspirating detector is arranged to detect the airborne substance and thereby detect that the temperature of the monitored environment exceeds the predetermined threshold.

Abstract: An aspiration smoke detection system for detecting the presence of a fire within a region of interest. The aspiration smoke detection system includes a smoke detection unit for detecting the presence of smoke particles suspended in air; and one or more local sensors located remotely from the smoke detection unit for measuring a property of air from the region of interest that is drawn into the aspiration smoke detection system. An inlet piece includes a sensor for use with the aspiration smoke detection system is also provided. A method of detecting a fire using the aspiration smoke detection system and a method of locating a fire using the aspiration smoke detection system are also provided.

Abstract: A smoke detector (100) for use with an aspiration smoke detector (ASD) is described. The smoke detector includes a light source (104) configured to emit a beam of light (108); a reflector (102) including an aperture (110), the aperture aligned with a direction of propagation of the beam of light when no scattering occurs; and a photodetector (106); the reflector configured to reflect light scattered from the beam of light received at the reflector to a single focal point; and the photodetector located at the single focal point. An aspiration smoke detector (ASD) system (2) includes the smoke detector and a method of detecting smoke using the smoke detector.

Abstract: Aspects of the invention are directed towards a system and method for noise suppression. One or more embodiments of the invention describe the method comprising steps of receiving noise by a microphone and deriving a noise signal from the noise, the noise produced by a fan of a fire/smoke detection unit while drawing air and detecting the speed of the fan of the fire/smoke detection unit. The method further describes steps of amplifying the noise signal by the amplifier received from the microphone and producing an anti-phase noise signal by shifting a phase of the amplified noise signal received from the amplifier wherein the anti-phase noise signal is dependent on the detected speed of the fan. The method further describes steps of outputting the anti-phase noise signal through a speaker to suppress the noise produced by the fan of the fire/smoke detection unit while drawing the air.

Abstract: An air particulate detection system is provided. The air particulate detection system comprising: an aspiration particulate detection system; one or more pipe runs fluidly connected to the aspiration detection system, wherein each of the one or more pipe runs includes one or more sampling points configured to allow an air particulate entry into at least one of the one or more pipe runs; and a secondary particulate detector fluidly connected to the aspiration particulate detection system through the one or more pipe runs, wherein the secondary particulate detector is in communication with the aspiration particulate detection system.

Abstract: An air particulate detection system is provided. The air particulate detection system comprising: an aspiration particulate detection system; one or more pipe runs fluidly connected to the aspiration detection system, wherein each of the one or more pipe runs includes one or more sampling points configured to allow an air particulate entry into at least one of the one or more pipe runs; and a secondary particulate detector fluidly connected to the aspiration particulate detection system through the one or more pipe runs, wherein the secondary particulate detector is in communication with the aspiration particulate detection system.