公开(公告)号：CA2727113C

公开(公告)日：2017-04-18

申请号：CA2727113

申请日：2009-06-10

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： KNOX RON ,  AJAY KEMAL ,  BOETTGER KARL

IPC: G01N21/53 ,  G08B17/107

Abstract: A particle detection system 600 including; at least one light source (606) adapted to illuminate a volume being monitored (610) at at least two wavelengths; a receiver (604) having a field of view (620) and being adapted to receive light from at least one light source (606, 607) 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 (624) associated with the receiver (604) 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 re-ceived at the two wavelengths.

公开(公告)号：HK1217807A1

公开(公告)日：2017-01-20

申请号：HK16105796

申请日：2016-05-20

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： KNOX RON ,  AJAY KEMAL ,  COOPER KATE K

IPC: G08B20060101 ,  G01N20060101

公开(公告)号：HK1203242A1

公开(公告)日：2015-10-23

申请号：HK15103766

申请日：2015-04-17

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： KNOX RON ,  NAYLOR MATTHEW M ,  AJAY KEMAL ,  SINGH RAJIV R

IPC: G08B20060101

Abstract: The invention relates to a particle detector, systems, and methods for detecting the presence of particles in a volume of air, most particularly it relates to detection systems and methods that use multiple modes of detection to detect the presence of particles. Preferably the particles being detected are particles that indicate an actual or incipient fire, or pyrolysis, such as smoke.

公开(公告)号：CA2836811A1

公开(公告)日：2012-12-27

申请号：CA2836811

申请日：2012-06-21

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： AJAY KEMAL ,  ALEXANDER BRIAN

IPC: G08B17/10

Abstract: A system and method of reducing the incidence of false alarms attributable to dust in smoke detection apparatus. The method includes obtaining at least two sample air flows, subjecting a first airflow to particle reduction and measuring the level of particles in the first airflow and generating a first signal indicative of the intensity. The method also includes measuring the level of particles in the second airflow and generating a second signal indicative of the intensity. The first signal is compared to a predetermined alarm level and, if the alarm level is achieved, the first and second signals are subsequently compared and an output signal is generated based on the relative difference between the first and second signals.

公开(公告)号：AU2011223512A1

公开(公告)日：2012-09-20

申请号：AU2011223512

申请日：2011-03-04

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： AJAY KEMAL ,  VAYEDA NITIN

IPC: B01D46/00 ,  G01N15/06

Abstract: There is describes a filter arrangement (10) for a particle detector (12) for detecting particles in an environment. The particle detector (12) can include one or more sensors (30) for analysing fluid in a detection region to produce sensor output. The filter arrangement (30) includes structure defining flow paths, for conveying fluid from the environment towards the detection region, including a first flow path (22), which includes a filter(26), and a second flow path (24) bypassing the filter(10). There is also provided a mechanism (120B) for controlling relative flow rates of fluid through the first flow path (22) and the second flow path (24) and a controller (32) configured to receive the sensor output corresponding to at least two relative flow rates and apply logic thereto to generate an output indicative of a condition of the filter.

公开(公告)号：CA2735715A1

公开(公告)日：2010-03-11

申请号：CA2735715

申请日：2009-09-04

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： ALEXANDER BRIAN ,  VAYEDA NITIN ,  AJAY KEMAL

IPC: G01N21/53 ,  G01N21/85 ,  G01N21/94 ,  G08B17/107

Abstract: A method of detecting particles in an air flow is described. The method includes receiving a signal indicative of light intensity scattered from the air flow at a plurality of wavelengths and processing the signal indicative of the intensity of received light at each of the wavelengths and a corresponding wavelength dependent parameter to generate an output signal indicative of at least one characteristic of particles in the air flow. A particle detection system is also described.

公开(公告)号：CA2883638A1

公开(公告)日：2006-05-18

申请号：CA2883638

申请日：2005-11-14

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： KNOX RON ,  BOETTGER KARL ,  AJAY KEMAL

IPC: G01N15/00

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).

公开(公告)号：CA2735715C

公开(公告)日：2018-10-23

申请号：CA2735715

申请日：2009-09-04

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： ALEXANDER BRIAN ,  VAYEDA NITIN ,  AJAY KEMAL

IPC: G01N21/53 ,  G01N21/85 ,  G01N21/94 ,  G08B17/107

Abstract: A method of detecting particles in an air flow is described. The method includes receiving a signal indicative of light intensity scattered from the air flow at a plurality of wavelengths and processing the signal indicative of the intensity of received light at each of the wavelengths and a corresponding wavelength dependent parameter to generate an output signal indicative of at least one characteristic of particles in the air flow. A particle detection system is also described.

公开(公告)号：CA2760026C

公开(公告)日：2018-03-20

申请号：CA2760026

申请日：2010-05-03

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： KNOX RON ,  BOETTGER KARL ,  AJAY KEMAL

IPC: G08B17/107 ,  G01N21/53

Abstract: A beam detector (10) including a light source (32), a receiver (34), and a target (36), acting in co-operation to de-tect particles in a monitored area (38). The target (36), reflects incident light (40), resulting in reflected light (32) being returned to receiver (34). The receiver (34) 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 (10) emits a first light beam (3614) in a first wavelength band; a second light beam (3618) in a second wavelength band; and a third light beam (3616) in a third wavelength band, wherein the first and second wavelengths bands are substantially equal and are different to the third wavelength band.

公开(公告)号：CA2705830C

公开(公告)日：2018-03-13

申请号：CA2705830

申请日：2008-11-14

Applicant: XTRALIS TECHNOLOGIES LTD

Inventor： KNOX RON ,  AJAY KEMAL ,  BOETTGER KARL

IPC: G01N21/53 ,  G08B17/107

Abstract: There are described systems for improving the sensitivity, usability, and robustness of particle detection systems (100) adapted to detect particles directly in a volume (110) being monitored, the system (100) including 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 a least part of a beam (106) from an illumination means (102); and means to analyse (107) the captured images to detect the presence of particles within the volume on the basis of radiation captured in the images.