Xtralis Technologies, Ltd.

Garrett Thermal Systems Limited

Vision Fire & Security Pty Ltd

Vfs Technologies Limited

Karl Boettger

Ron Knox

Kemal Ajay

Brian Alexander

Peter John Meikle

Rajiv Kumar Singh

Thor North

Stephen James Pattinson

Peter Massingberd-Mundy

Ronald Knox

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.

Addressability in particle detection

A particle detection system (), such as an active video smoke detection system, includes at least one illumination means () for directing a beam () of radiation through at least part of the air volume being monitored (), an image sensor () is positioned to capture images of at least part of a beam () from illumination means (); and means to analyse () 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 () to create a curtain of light or a rapidly-scanned beam across the air volume (), and configuring a reflector to steer or change direction of a beam reflected from illumination means ().

Particle detection

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

Particle detector, system and method

A particle detection system (), such as an active video smoke detection system, includes at least one illumination means () for directing a beam () of radiation through at least part of the air volume being monitored (), an image sensor () is positioned to capture images of at least part of a beam () from illumination means (); and means to analyze () 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 () to create a curtain of light or a rapidly-scanned beam across the air volume (), and configuring a reflector to steer or change direction of a beam reflected from illumination means ().

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.

A particle detector including a chamber, a first aspirator, a sensor(s), a controller and clean air supply. The controller, when in a detecting mode, receives an indicative signal from the sensor and applies logic to the indicative signal to generate a further signal, and when in the purge mode controls substantial purging of the chamber of sample fluid with clean fluid from the clean fluid supply. The controller receives the indicative signal when the chamber is so purged and if necessary adjusts the logic in response thereto.

Chamber condition

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.

Particle detectors

A smoke detecting method which uses a beam of radiation such as a laser (), to monitor a region, such as a room (). A camera () is used to capture images of part of the room (), including a path of the laser beam. Particles in the laser beam scatter light (), and this is captured by the camera () for analysis. A processor () extracts data relating to the scattered light () to determine the density of particles in the beam, to determine the level of smoke in the region. The laser may have a modulated output () so that images captured without the laser tuned 'on' can be used as a reference point and compared to images taken with the laser turned 'on', to assist in determining the level of scattered light () compared to ambient light. Filters () may be used to decrease signals generated from background light.

Method of detecting particles by detecting a variation in scattered radiation

A beam detector () including a light source (), a receiver (), and a target (), acting in co-operation to detect particles in a monitored area (). The target (), reflects incident light (), resulting in reflected light () being returned to receiver (). The receiver () is a 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.

Growing community of inventors

Mount Waverley, Australia

Karl Boettger