| 摘要 |
It is disclosed an extended-life video detector assembly (VDA) directable at a viewing region. The VDA includes a video camera module having a normally inactive state, and a passive detection module (PDM) for selective activation of the video camera module. A battery powers the VDA for an extended period of at least two years. The VDA may include a control panel assembly (CPA) positioned within a communication range from the VDA for sending and receiving wireless signals to and from the VDA, and a central monitoring station located remotely from the CPA and communicating with it. Also the VDA includes a recording module, for recording video information. The PDM discriminates movement of an object in the viewing region and consequently activates the video camera module, based on characteristic parameters like temperature, size, movement direction, and movement speed. |
