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1. 发明授权

US4959874A Optical wireless communication system 失效
标题翻译：光无线通信系统
公开(公告)号：US4959874A
公开(公告)日：1990-09-25
申请号：US269823
申请日：1988-11-09
申请人： Makoto Saruta , Tatsuhiro Suzuki
发明人： Makoto Saruta , Tatsuhiro Suzuki
IPC分类号： H04B10/07 , H04B10/11 , H04B10/114
CPC分类号： H04B10/1149
摘要： An optical wireless communications system includes a plurality of terminals each having a transmitter which transmits optical signals on a first carrier frequency and a receiver which receives optical signals on a second carrier frequency, and a plurality of optical repeaters each having a plurality of transmitters, a plurality of receivers and an optical signal destination determining structure, the optical repeaters being coupled to communicate with each other and with the terminals wherein each of the optical repeaters converts the carrier frequency of the received optical signals from one frequency to another frequency and transmits the latter frequency signals to all the terminals and to all the optical repeaters except the transmitting optical repeater of the latter frequency signals.
摘要翻译：光无线通信系统包括多个终端，每个终端具有在第一载波频率上发射光信号的发射机和接收第二载频上的光信号的接收机，以及多个具有多个发射机的光中继器，多个接收机和光信号目的地确定结构，光中继器被耦合以彼此通信并与终端进行通信，其中每个光中继器将接收的光信号的载波频率从一个频率转换到另一个频率，并将后者对所有终端的频率信号和除后面的频率信号的发射光中继器之外的所有光中继器。

2. 发明授权

US5187688A Method of counting the number of passers-by 失效
标题翻译：计算路人人数的方法
公开(公告)号：US5187688A
公开(公告)日：1993-02-16
申请号：US864459
申请日：1992-04-06
申请人： Makoto Saruta
发明人： Makoto Saruta
IPC分类号： G01S15/52 , G01S15/04 , G01S15/50 , G01S15/87 , G01S15/88 , G06M7/00 , G07C9/00
CPC分类号： G07C9/00 , G01S15/50 , G01S15/87
摘要： A passage is periodically scanned by a plurality of ultrasonic transmitters/receivers (sensors) arranged on the ceiling of the passage in two lines to calculate the height of an object to be measured to each sensor and the presence or absence of the measured object(s), moving direction(s) thereof, and the number thereof are reckoned from changes in sensed height and sensing time for each sensor induced by passing an object to be measured through the passage, and the position and a change in position with time of each sensor which senses the measured object concerned to count the number of passers-by in each moving direction. The presence or absence of the object to be measured and the number to be counted are decided in accordance with changes in sensed position and sensed height and the interrelation thereof, so that the number of sensors can be reduced and the number of passers-by can be counted at a high accuracy even when a plurality of persons pass under the sensors in a group.
摘要翻译：由通过两条线路布置在通道的天花板上的多个超声波发射器/接收器（传感器）周期性地扫描通道，以计算要测量的物体的高度到每个传感器以及被测物体的存在或不存在），其移动方向及其数量来自于通过通过通过通过待测量物体而引起的每个传感器的感测高度和感测时间的变化，以及每个传感器的位置和位置随时间的变化感测所测量的物体以计算每个移动方向上的路人数。要测量的对象的存在或不存在以及要被计数的数量根据感测到的位置和感测高度的变化及其相互关系来确定，使得可以减少传感器的数量并且路人的数量即使当多个人通过组中的传感器下方时，也可以高精度地计数。

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