Fire detection method
    4.
    发明授权
    Fire detection method 失效
    火灾探测方法

    公开(公告)号:US07154400B2

    公开(公告)日:2006-12-26

    申请号:US10885528

    申请日:2004-06-28

    IPC分类号: G08B17/12

    CPC分类号: G08B17/125

    摘要: A method for detecting a fire while discriminating against false alarms in a monitored space containing obstructed and partially obstructed views includes the steps of positioning an infrared camera in a location where the camera has both a direct view of a first portion of the monitored space and an obstructed view of a second portion of the monitored space, the camera including a charge coupled device (CCD) array sensitive to wavelengths in the range of from about 400 to about 1000 nm and a long pass filter for transmitting wavelengths greater than about 700 nm; filtering out radiation wavelengths lower than about 700 nm; converting an electrical current from the CCD array to a signal input to a processor; processing the signal; and generating alarms when predetermined criteria are met to indicate the presence of a fire in one or both of the first portion of the monitored space and the second portion of the monitored space. Indirect radiation, such as radiation scattered and reflected from common building or shipboard materials and components, indicative of a fire can be detected. The method can be implemented with relatively low cost components. A benefit of using the invention in a system in combination with Video Image Detection Systems (VIDS) is that in principle both fire and smoke can be detected for an entire compartment without either kind of source having to be in the direct LOS of the cameras, so that the entire space can be monitored for both kinds of sources with a single system.

    摘要翻译: 一种用于在包含受阻挡和部分阻碍的视野的被监视空间中识别出假警报时检测火的方法包括以下步骤:将红外摄像机定位在相机具有被监视空间的第一部分的直视图和 受监视空间的第二部分的阻挡视图,照相机包括对从约400至约1000nm范围内的波长敏感的电荷耦合器件(CCD)阵列和用于传输大于约700nm的波长的长通滤波器; 滤除低于约700nm的辐射波长; 将来自CCD阵列的电流转换成输入到处理器的信号; 处理信号; 以及当满足预定标准时产生警报,以指示所监视的空间的第一部分和所监视的空间的第二部分中的一个或两个中是否存在火灾。 可以检测到指示火灾的间接辐射,例如散射并从普通建筑物或船上材料和部件反射的辐射。 该方法可以以相对低成本的组件来实现。 在与视频图像检测系统(VIDS)结合的系统中使用本发明的优点在于,原则上可以检测整个隔间的火和烟,而不必将任何一种源都放在相机的直接LOS中, 以便可以使用单个系统监控两种源的整个空间。

    Video-Enhanced Optical Detector
    10.
    发明申请
    Video-Enhanced Optical Detector 审中-公开
    视频增强型光学检测器

    公开(公告)号:US20110304728A1

    公开(公告)日:2011-12-15

    申请号:US13159262

    申请日:2011-06-13

    IPC分类号: H04N5/33

    摘要: The document describes a method of transforming available live video output from a camera into a format compatible for combination with existing single element detectors operating at various spectral bands to achieve improved performance for non-imaging, optical event detectors, especially for optical flame detectors. The method can utilize data that is becoming increasingly available because of the expanding deployment of surveillance cameras that are prevalent in many sensing and security devices and systems. Augmenting output from established OFD sensors with the data stream converted from the video output and incorporating viable algorithms can yield a detection method with improved performance with respect to both sensitivity and selectivity without requiring additional hardware deployment.

    摘要翻译: 该文献描述了一种将来自相机的可用实况视频输出转换为与在各种频谱带操作的现有单一元件检测器组合的格式的方法,以实现非成像光学事件检测器,特别是用于光学火焰检测器的改进的性能。 该方法可以利用越来越多的数据,因为在许多感测和安全设备和系统中普遍存在的监控摄像机的扩展部署。 使用从视频输出转换的数据流并结合可行的算法来增强已建立的OFD传感器的输出,可以产生一种检测方法,无论是灵敏度还是选择性都能提高性能,无需额外的硬件部署。