公开(公告)号：US20160153906A1

公开(公告)日：2016-06-02

申请号：US15015787

申请日：2016-02-04

Applicant: Xtralis Technologies Ltd.

Inventor： Ron KNOX ,  Kate COOPER ,  Peter MEIKLE ,  Brian ALEXANDER

IPC: G01N21/53 ,  G08B17/10 ,  G06K9/46 ,  G01N21/85 ,  G01N15/14

CPC classification number: G01N21/53 ,  G01N15/1434 ,  G01N21/84 ,  G01N21/85 ,  G01N2201/06113 ,  G01N2201/12 ,  G01S7/4802 ,  G01S7/4811 ,  G01S7/497 ,  G01S17/89 ,  G06K9/46 ,  G08B17/10 ,  G08B17/103 ,  G08B17/107 ,  G08B17/125

Abstract: A smoke detecting method which uses a beam of radiation such as a laser (16), to monitor a region, such as a room (12). A camera (14) is used to capture images of part of the room (12), including a path of the laser beam. Particles in the laser beam scatter light (30), and this is captured by the camera (14) for analysis. A processor (20) extracts data relating to the scattered light (30) 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 (38) 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 (30) compared to ambient light. Filters (24, 26) may be used to decrease signals generated from background light.

公开(公告)号：US20150177137A1

公开(公告)日：2015-06-25

申请号：US14636840

申请日：2015-03-03

Applicant: Xtralis Technologies Ltd.

Inventor： Ron KNOX ,  Karl BOETTGER ,  Peter MEIKLE ,  Brian ALEXANDER

IPC: G01N21/53 ,  G01S7/481 ,  G08B17/12 ,  G06K9/46 ,  G08B17/107 ,  G01N21/85 ,  G01S17/89

CPC classification number: G01N21/53 ,  G01N15/1434 ,  G01N21/84 ,  G01N21/85 ,  G01N2201/06113 ,  G01N2201/12 ,  G01S7/4802 ,  G01S7/4811 ,  G01S7/497 ,  G01S17/89 ,  G06K9/46 ,  G08B17/10 ,  G08B17/103 ,  G08B17/107 ,  G08B17/125

Abstract: A smoke detecting method which uses a beam of radiation such as a laser (16), to monitor a region, such as a room (12). A camera (14) is used to capture images of part of the room (12), including a path of the laser beam. Particles in the laser beam scatter light (30), and this is captured by the camera (14) for analysis. A processor (20) extracts data relating to the scattered light (30) 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 (38) 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 (30) compared to ambient light. Filters (24, 26) may be used to decrease signals generated from background light.

Abstract translation: 使用诸如激光（16）的辐射束的烟雾检测方法来监视诸如房间（12）的区域。 相机（14）用于捕获包括激光束的路径的房间（12）的一部分的图像。 激光束中的粒子散射光（30），并且由相机（14）捕获用于分析。 处理器（20）提取与散射光（30）相关的数据，以确定光束中的粒子的密度，以确定该区域中的烟雾水平。 激光器可以具有调制输出（38），使得在没有激光调谐为“开”的情况下拍摄的图像可以用作参考点，并且与激光器“打开”拍摄的图像进行比较，以帮助确定散射光的水平 （30）与环境光相比。 滤波器（24,26）可用于减少从背景光产生的信号。