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    • 102. 发明授权
    • Entry detecting system
    • 进入检测系统
    • US08130114B2
    • 2012-03-06
    • US11808756
    • 2007-06-12
    • Masahiro YanagiShigemi KurashimaTakashi YubaTakashi Arita
    • Masahiro YanagiShigemi KurashimaTakashi YubaTakashi Arita
    • G08B21/00
    • G07C9/00166G08B13/2417G08B13/2431G08B13/2454G08B13/2474G08B13/2482G08B21/0261G08B21/22
    • An entry detecting system includes a terminal device; a point-to-point communication device; an entry detecting device; and a guard device. The point-to-point communication device includes a transmitting-receiving antenna having directivity in a specific direction. The point-to-point communication device communicates by radio with the terminal device via the transmitting receiving antenna so as to detect a response time from the terminal device and report detected response time to the entry detecting device. The entry detecting device detects a distance from the point-to-point communication device to the terminal device based on the response time reported by the point-to-point communication device, generates entry detecting information based on the detected distance, and transmits the entry detecting information to the point-to-point communication device and the guard device. The point-to-point communication device transmits the received entry detecting information to the terminal device.
    • 入口检测系统包括终端设备; 点对点通信设备; 入口检测装置; 和防护装置。 点对点通信装置包括具有特定方向的方向性的发送接收天线。 点对点通信装置经由发送接收天线与终端装置进行无线通信,以检测来自终端装置的响应时间,并将检测到的响应时间报告给入口检测装置。 入口检测装置基于点对点通信装置报告的响应时间,检测从点对点通信装置到终端装置的距离,基于检测到的距离生成条目检测信息,并发送该条目 检测信息到点对点通信设备和保护设备。 点对点通信装置将接收到的条目检测信息发送到终端装置。