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    • 3. 发明公开
    • 무선통신 시스템 기반의 미아방지 장치
    • 失落儿童防御系统
    • KR1020110066532A
    • 2011-06-17
    • KR1020090123225
    • 2009-12-11
    • 송자영
    • 송자영
    • G01S11/04G08B25/00
    • PURPOSE: A lost child prevention apparatus based on a wireless communication system is provided to generate a warning call and a warning light according to a distance between parents and a child by using the strength of a signal of a wireless communication module. CONSTITUTION: A lost child prevention apparatus based on a wireless communication system is characterized in that an event is generated by using a signal value reduced according to a distance between two persons having wireless communication modules. The lost child prevention apparatus includes a CPU(3) having an embedded structure, a speaker(5) for generating the event, an LED(4), and a wireless communication module having an antenna for sensing a signal.
    • 目的:提供一种基于无线通信系统的失落儿童预防装置,通过使用无线通信模块的信号的强度,根据父母与孩子之间的距离产生警告呼叫和警告灯。 构成:基于无线通信系统的失眠防止装置的特征在于,通过使用根据具有无线通信模块的两人之间的距离减小的信号值来生成事件。 失落儿童防护装置包括具有嵌入结构的CPU(3),用于产生该事件的扬声器(5),LED(4)以及具有用于感测信号的天线的无线通信模块。
    • 4. 发明公开
    • 위치 추적 시스템 및 그 방법
    • 位置跟踪系统及其方法
    • KR1020110064984A
    • 2011-06-15
    • KR1020090121795
    • 2009-12-09
    • (주)한울옵틱스
    • 박현수
    • G01S5/12G01S11/04
    • PURPOSE: A position tracking system and a position tracking method for the same are provided to offset the errors of electronic wave due to positions and weather and reduce load applied to a server. CONSTITUTION: A data base(30) receives and stores position signal strength data from receivers through gateways. A position tracking server(40) calculates three or more distances from the receivers based on the data. Three or more circles are generated based on the calculated distances as the radiuses of the circles. If parts of the circles are overlapped, a server selects the most overlapped region. Unless parts of the circles are overlapped, circles are generated by adjusting the radiuses and the most overlapped region is selected.
    • 目的:提供位置跟踪系统和位置跟踪方法,以抵消由于位置和天气引起的电子波的误差,并降低施加到服务器的负载。 构成:数据库(30)通过网关接收和存储来自接收机的位置信号强度数据。 位置跟踪服务器(40)基于数据计算从接收器的三个或更多个距离。 基于计算出的距离作为圆的半径生成三个或更多个圆。 如果部分圆圈重叠,则服务器选择最重叠的区域。 除非圆的部分重叠,否则通过调整半径来生成圆,并选择最重叠的区域。
    • 9. 发明授权
    • 전파 송신원의 위치를 추정하는 위치 추정 장치 및 방법
    • 位置估计装置和估计无线电波源的位置的方法
    • KR101446445B1
    • 2014-10-06
    • KR1020130151233
    • 2013-12-06
    • 한국항공우주연구원
    • 임덕원강재민허문범
    • G01S3/02G01S11/04
    • A position estimating method for estimating a position of a radio wave source is disclosed. The position estimating method according to an embodiment of the present invention comprises the steps o: acquiring a first information based on a Time Difference of Arrival method of a radio wave which is transmitted from the radio wave source and a second information based on an Angle of Arrival method of the radio wave; determining initial conditions of the Time Difference of Arrival method on the basis of the second information; and estimating the position of the radio wave source based on the determined initial condition and the first information.
    • 公开了一种用于估计无线电波源的位置的位置估计方法。 根据本发明的实施例的位置估计方法包括以下步骤:基于从无线电波源发送的无线电波的到达时间差的方法获取第一信息和基于从无线电波源发送的第二信息的第二信息 无线电波的到达方式; 基于第二信息确定到达时差方法的初始条件; 以及基于所确定的初始条件和所述第一信息来估计所述无线电波源的位置。
    • 10. 发明授权
    • AOA/TDOA조합을 이용한 위치추정방법 및 이를 이용한 위치추정장치
    • 使用TDOA与AOA进行组合的方法以及使用该方法进行地球化的设备
    • KR101381254B1
    • 2014-04-04
    • KR1020130046674
    • 2013-04-26
    • 국방과학연구소
    • 조제일한진우김산해송규하
    • G01S11/04G01S5/04
    • The present invention relates to a locating method using an AOA/TDOA combination and a locating apparatus using the same. The locating method comprises (a) setting a location range of a target using an AOA (Angle of Arrival) of each receiver; (b) randomly selecting N locations within the set location range of the target; (c) computing a delay time due to a distance between the receivers at each of the N selected locations and extracting N TDOA (Time Difference of Arrival) pairs at a reference receiver using the computed delay time; (d) comparing the N TDOA pairs with K candidate TDOA pairs to measure error values; (e) selecting M minimum error values from the measure error values and choosing M TDOA pairs having the selected minimum error values; and (f) selecting a location corresponding to the M selected TDOA pairs when repeating steps (b) through (e) reaches a predetermined number of times. According to the present invention, AOA (Angle of Arrival) information is used to minimize pulse ambiguity that may be caused upon using TDOA schemes, thus enhancing locating accuracy. [Reference numerals] (AA) Start; (BB) YES; (CC) NO; (DD) End; (S100) Set target location range using AOA of each receiver; (S200) Select N random locations; (S300) Extract TDOA pair at N random locations; (S400) Compare N TDOA pairs with K candidate TDOA pairs and select M ones; (S500) Select M ones over TDOA having smaller error value; (S600) Repetition count=L; (S700) Reset range from location corresponding to M TDOA pairs; (S800) Select location with respect to TDOA pair having minimum error value
    • 本发明涉及使用AOA / TDOA组合的定位方法和使用它的定位装置。 定位方法包括:(a)使用每个接收机的AOA(到达角度)来设置目标的位置范围; (b)在目标的设定位置范围内随机选择N个位置; (c)计算由于N个选择位置中的每一个处的接收机之间的距离引起的延迟时间,并且使用所计算的延迟时间提取参考接收机处的NTDOA(到达时差)对; (d)将N个TDOA对与K个候选TDOA对比较以测量误差值; (e)从所述测量误差值中选择M个最小误差值并选择具有所选择的最小误差值的M个TDOA对; 和(f)当重复步骤(b)至(e)时,选择对应于M个选择的TDOA对的位置达到预定次数。 根据本发明,使用AOA(到达角度)信息来最小化在使用TDOA方案时可能引起的脉冲模糊度,从而增强定位精度。 (附图标记)(AA)开始; (BB)YES; (CC)NO; (DD)结束; (S100)使用每个接收机的AOA设置目标位置范围; (S200)选择N个随机位置; (S300)在N个随机位置提取TDOA对; (S400)比较N个TDOA对与K个候选TDOA对,并选择M个; (S500)通过具有较小误差值的TDOA选择M个; (S600)重复计数= L; (S700)从对应于M TDOA对的位置复位范围; (S800)选择相对于具有最小误差值的TDOA对的位置