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    • 2. 发明申请
    • LOCAL POSITIONING SYSTEM AND METHOD FOR DETERMINING A POSITION
    • 本地定位系统和确定位置的方法
    • WO2013132409A1
    • 2013-09-12
    • PCT/IB2013/051701
    • 2013-03-04
    • KONINKLIJKE PHILIPS N.V.
    • PITCHERS, Stephen, MichaelSIMONS, Paul, Richard
    • G01S15/74G01S15/87
    • G01S15/74G01S15/876
    • A local positioning system is provided comprising a mobile unit (10) and at least one stationary unit (20). The mobile unit (10) comprises a sound generating unit (11), an acoustic-to-electric transducer (12) and a light detector (13), all electrically coupled to a control unit (14). The at least one stationary unit (20) comprises a sound generating unit (21), an acoustic-to-electric transducer (22) and a lamp (23), all electrically coupled to a control unit (24). The control unit (14) of the mobile unit (10) is operative to control the sound generating unit (11) of the mobile unit (10) to generate an initiation sound at an initiation time T 0 and to determine a distance between the mobile unit (10) and the stationary unit (20) based on the initiation time T 0 , a time R 10 of detecting an acoustic response by the acoustic-to-electric transducer (12) of the mobile unit (10) and a light coded data portion detected by the light detector (13). The control unit (24) of the stationary unit (20) is operative to schedule a reply message at a scheduled time T 1 , the reply message comprising the light coded data portion and the acoustic response, the light coded data portion comprising a time interval between a time R 01 of detecting the initiation sound by the acoustic-to-electric transducer (22) of the stationary unit (20) and the scheduled time T 1 . The control unit (24) of the stationary unit (20) is further operative to control the lamp (23) to send out the light coded data portion and to control the sound generating unit (21) of the stationary unit (20) to send out the acoustic response at the scheduled time T 1 .
    • 提供了一种本地定位系统,其包括移动单元(10)和至少一个固定单元(20)。 移动单元(10)包括声音产生单元(11),声 - 电换能器(12)和光检测器(13),全部电耦合到控制单元(14)。 至少一个固定单元(20)包括声音产生单元(21),声 - 电换能器(22)和灯(23),全部电耦合到控制单元(24)。 移动单元(10)的控制单元(14)可操作以控制移动单元(10)的声音产生单元(11)在起始时间T0产生起始声音,并且确定移动单元 (10)和固定单元(20),基于起始时间T0,检测由移动单元(10)的声 - 电换能器(12)的声响应的时间R10和检测到的光编码数据部分 通过光检测器(13)。 固定单元(20)的控制单元(24)可操作以在调度时间T1调度应答消息,该应答消息包括光编码数据部分和声响应,光编码数据部分包括: 检测由固定单元(20)的声电传感器(22)发出的起始声音的时间R01和预定时间T1。 固定单元(20)的控制单元(24)还可操作以控制灯(23)发出光编码数据部分并控制固定单元(20)的声音发生单元(21)发送 在预定时间T1出声音响应。