Abstract: Smoke detection sample points and systems are described herein. One smoke detection sample point includes a body having a chamber formed within the body, a first air flow conduit formed within the body having two ends and the ends being open, to allow air to pass through the first air flow conduit between an area to be sampled and the chamber, and a second air flow conduit formed within the body having two ends with one end being open and having an air seal, to prevent air from passing through the second air flow conduit between the area to be sampled and the chamber.

Abstract: Devices, methods, and systems having insect guards in devices and systems for aspirated smoke, gas, or air quality monitoring are described herein. One aspirated smoke, gas, or air quality monitoring unit includes a detector module that includes at least one particulate sensing chamber within the detector module and an air inlet connecting the sampling tube to the particulate sensing chamber allowing communication of air from the sampling tube to the particulate sensing chamber; and a spiral shaped insect guard positioned within the inlet.

Abstract: Smoke detection sample points and systems are described herein. One smoke detection sample point includes a body having a chamber formed within the body, a first air flow conduit formed within the body having two ends and the ends being open, to allow air to pass through the first air flow conduit between an area to be sampled and the chamber, and a second air flow conduit formed within the body having two ends with one end being open and having an air seal, to prevent air from passing through the second air flow conduit between the area to be sampled and the chamber.

Abstract: Smoke detection sample points and systems are described herein. One smoke detection sample point includes a body having a chamber formed within the body, a first air flow conduit formed within the body having two ends and the ends being open, to allow air to pass through the first air flow conduit between an area to be sampled and the chamber, and a second air flow conduit formed within the body having two ends with one end being open and having an air seal, to prevent air from passing through the second air flow conduit between the area to be sampled and the chamber.

Abstract: Devices, methods, and systems having insect guards in devices and systems for aspirated smoke, gas, or air quality monitoring are described herein. One aspirated smoke, gas, or air quality monitoring unit includes a detector module that includes at least one particulate sensing chamber within the detector module and an air inlet connecting the sampling tube to the particulate sensing chamber allowing communication of air from the sampling tube to the particulate sensing chamber; and a spiral shaped insect guard positioned within the inlet.

Abstract: Smoke detection sample points and systems are described herein. One smoke detection sample point includes a body; a chamber formed within the body, the chamber having a first aperture, to allow air to pass between an area to be sampled and the chamber, and a second aperture, to allow air to pass between the chamber and a space within a second enclosure; a valve positioned within the chamber; a first enclosure surrounding the body, but allowing the first aperture to pass air between the area to be sampled and the chamber and the second aperture to pass air between the chamber and the space within the second enclosure; and the second enclosure surrounding the first enclosure and having a third aperture, the third aperture allowing the air in the space within the second enclosure to pass between the second enclosure and a tube connected to the second enclosure.

Abstract: Devices, methods, and systems for a modular aspirated smoke, gas, or air quality monitoring system are described herein. One modular monitoring unit, includes a base having a plurality of sampling tubes mounted thereon, at least one pump, and at least one detector module that is releasably attached to the base, wherein the pump draws air from one of the sampling tubes into a particulate sensing chamber within the detector module.

Abstract: Smoke detection sample points and systems are described herein. One smoke detection sample point includes a body; a chamber formed within the body, the chamber having a first aperture, to allow air to pass between an area to be sampled and the chamber, and a second aperture, to allow air to pass between the chamber and a space within a second enclosure; a valve positioned within the chamber; a first enclosure surrounding the body, but allowing the first aperture to pass air between the area to be sampled and the chamber and the second aperture to pass air between the chamber and the space within the second enclosure; and the second enclosure surrounding the first enclosure and having a third aperture, the third aperture allowing the air in the space within the second enclosure to pass between the second enclosure and a tube connected to the second enclosure.

Abstract: A method of determining at least one point of entry of smoke into a smoke detection system, the system having a sampling pipe network including at least one sampling pipe and a plurality of sampling inlets through which an air sample can enter the at least one sampling pipe of the smoke detection system for analysis by a particle detector, said method including: determining a volume of sample air that has passed through at least part of the smoke detection system since a predetermined event or a value corresponding to said volume; and determining through which sampling inlet of the plurality of sampling inlets the smoke entered the smoke detection system based, at least in part, on the determined volume or value. Systems for implementing such a method and related methods are also described.

Abstract: A beam detector including a light source, a receiver, and a target, acting in cooperation to detect particles in a monitored area. The target reflects incident light, resulting in reflected light being returned to receiver. The receiver is capable of recording and reporting light intensity at a plurality of points across its field of view. In the preferred form the detector emits a first light beam in a first wavelength band; a second light beam in a second wavelength band; and a third light beam in a third wavelength band, wherein the first and second wavelengths bands are substantially equal and are different to the third wavelength band.

Abstract: A method of determining at least one point of entry of smoke into a smoke detection system, the system having a sampling pipe network including at least one sampling pipe and a plurality of sampling inlets through which an air sample can enter the at least one sampling pipe of the smoke detection system for analysis by a particle detector, said method including: determining a volume of sample air that has passed through at least part of the smoke detection system since a predetermined event or a value corresponding to said volume; and determining through which sampling inlet of the plurality of sampling inlets the smoke entered the smoke detection system based, at least in part, on the determined volume or value. Systems for implementing such a method and related methods are also described.

Abstract: A particle detection system (100), such as an active video smoke detection system, includes at least one illumination means (102) for directing a beam (106) of radiation through at least part of the air volume being monitored (110), an image sensor (104) is positioned to capture images of at least part of a beam (106) from illumination moans (102); and means to analyse (107) the captured images to detect the presence of particles within the volume. At least 29 different aspects are described for improving the sensitivity, usability, and robustness of particle detection. These include, for example, configuring illumination means (102) to create a curtain of light or a rapidly-scanned beam across the air volume (110), and configuring a reflector to steer or change direction of a beam reflected from illumination means (102).

Abstract: A method of determining at least one point of entry of smoke into a smoke detection system, the system having a sampling pipe network including at least one sampling pipe and a plurality of sampling inlets through which an air sample can enter the at least one sampling pipe of the smoke detection system for analysis by a particle detector, said method including: determining a volume of sample air that has passed through at least part of the smoke detection system since a predetermined event or a value corresponding to said volume; and determining through which sampling inlet of the plurality of sampling inlets the smoke entered the smoke detection system based, at least in part, on the determined volume or value. Systems for implementing such a method and related methods are also described.

Abstract: A particle detection system (100), such as an active video smoke detection system, includes at least one illumination means (102) for directing a beam (106) of radiation through at least part of the air volume being monitored (110), an image sensor (104) is positioned to capture images of at least part of a beam (106) from illumination means (102); and means to analyse (107) the captured images to detect the presence of particles within the volume. At least 29 different aspects are described for improving the sensitivity, usability, and robustness of particle detection. These include, for example, configuring illumination means (102) to create a curtain of light or a rapidly-scanned beam across the air volume (110), and configuring a reflector to steer or change direction of a beam reflected from illumination means (102).

Abstract: A particle detection system including; at least one light source adapted to illuminate a volume being monitored at at least two wavelengths; a receiver having a field of view and being adapted to receive light from at least one light source after said light has traversed the volume being monitored and being adapted to generate signals indicative of the intensity of light received at regions within the field of view of the receiver; a processor associated with the receiver adapted to process the signals generated by the receiver to correlate light received at at least two wavelengths in corresponding regions within the field of view of the receiver and generate an output indicative of the relative level of light received at the two wavelengths.

Abstract: A method of particle detection in an aspirated particle detection system having a sampling pipe network and a particle detector. The method includes drawing sample air to the particle detector through the air sampling network; analyzing the sample air with the particle detector; entering an amplification phase, in the event that a concentration of particles in the sample air greater than a predetermined threshold is detected, to create a plurality of sample air packets in the sampling pipe, wherein each sample air packet corresponds to a sampling inlet and includes an amplified concentration of air drawn from the corresponding sampling inlet; transporting the sample air including the plurality of sample air packets through the sampling pipe to the particle detector; and determining through which sampling inlet any particles entered the particle detection system.

Abstract: The invention provides use of one or more emitted beams of radiation (16), for example, laser beam(s), in combination with an image capturing means (14), for example, one or more video cameras and/or optical elements to detect particles (30), for example, smoke particles, located in an open space (12).

Abstract: A beam detector including a light source, a receiver, and a target, acting in cooperation to detect particles in a monitored area. The target reflects incident light, resulting in reflected light being returned to receiver. The receiver is capable of recording and reporting light intensity at a plurality of points across its field of view. In the preferred form the detector emits a first light beam in a first wavelength band; a second light beam in a second wavelength band; and a third light beam in a third wavelength band, wherein the first and second wavelengths bands are substantially equal and are different to the third wavelength band.

Abstract: A beam detector including a light source, a receiver, and a target, acting in cooperation to detect particles in a monitored area. The target reflects incident light, resulting in reflected light being returned to receiver. The receiver is capable of recording and reporting light intensity at a plurality of points across its field of view. In the preferred form the detector emits a first light beam in a first wavelength band; a second light beam in a second wavelength band; and a third light beam in a third wavelength band, wherein the first and second wavelengths bands are substantially equal and are different to the third wavelength band.