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    • 89. 发明申请
    • Antitheft system
    • 防盗系统
    • US20050030173A1
    • 2005-02-10
    • US10483542
    • 2002-07-08
    • Takuya SuzukaHiroshi Yoshida
    • Takuya SuzukaHiroshi Yoshida
    • G08B13/24G08B1/08G08B1/00
    • G08B1/08G08B13/1672G08B29/185
    • The present invention provides a burglar alarm system capable of accurately discriminating external noises approximate to an alarm such as background music, ambient noises, etc. and reverberations of an alarm attributable to an architectural design of the interior of a store, etc. from a legitimate alarm. A burglar alarm system of the present invention comprises an alarm unit attached to an object to be protected from theft to emit an alarm of a certain frequency in response to illegal conduct and an alarm sensor for emitting an alarm signal upon sensing an alarm from said alarm unit, wherein said alarm sensor has first and second determination means for evaluating an input signal containing an alarm from the alarm unit and external noises, and the first determination means evaluates a random external noise contained in the input signal (S4, S5) whereas the second determination means evaluates a reflected sound caused by reverberations of the alarm (S6, S7) to emit an alarm signal (S9).
    • 本发明提供了一种防盗报警系统,其能够准确地识别近似于诸如背景音乐,环境噪声等的报警的外部噪声和归因于商店内部的建筑设计的报警的混响等从合法的 报警。 本发明的防盗报警系统包括:安装在被保护物体上的报警单元,用于响应非法行为发出特定频率的报警;以及报警传感器,用于在从所述报警器检测到报警时发出报警信号 单元,其中所述报警传感器具有用于从所述报警单元和外部噪声评估包含报警的输入信号的第一和第二确定装置,并且所述第一确定装置评估包含在所述输入信号中的随机外部噪声(S4,S5),而 第二确定装置评估由报警的混响引起的反射声音(S6,S7)以发出报警信号(S9)。