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公开(公告)号：US5123029A
公开(公告)日：1992-06-16
申请号：US718525
申请日：1991-06-21
申请人： David F. Bantz , Robert T. Cato , Chia-chi Huang
发明人： David F. Bantz , Robert T. Cato , Chia-chi Huang
IPC分类号： H04B1/713 , H04B7/26 , H04J3/00 , H04L5/22 , H04L12/28 , H04L12/407 , H04L12/56 , H04W74/02 , H04W74/04 , H04W74/08
CPC分类号： H04W74/02 , H04B1/713 , H04L12/40136 , H04L12/4035 , H04L12/407
摘要： A hybrid of controlled access and random access schemes using frequency hopping spread spectrum communication techniques is implemented in an indoor digital data radio communication system between mobile stations and a computer system. A hop in the frequency hopping spread spectrum communication system is subdivided into two intervals so that different media-access protocols can be used in each interval. The protocol uses a centralized control scheme in one interval and a decentralized scheme in the other, and the intervals may be varied depending on the load of the system.
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公开(公告)号：US20080295598A1
公开(公告)日：2008-12-04
申请号：US12193787
申请日：2008-08-19
IPC分类号： G01N29/04
CPC分类号： G01B17/02 , B41J11/0075 , B41J15/02 , B65H26/08 , B65H2553/30
摘要： A system for sensing paper on a paper roll includes an ultrasonic transducer positioned to be in contact with an outer surface of the paper roll; a transmitter circuit in communication with the ultrasonic transducer, the transmitter circuit providing a transmit signal to the ultrasonic transducer, the ultrasonic transducer generating an ultrasonic signal in response to the transmit signal; a receiver circuit in communication with the ultrasonic transducer, the receiver circuit providing a received signal indicative of an ultrasonic return echo from the paper roll, the ultrasonic return echo resulting from the ultrasonic signal interacting with the paper roll; and a processor circuit, in communication with the transmitter circuit and the receiver circuit, that determines an amount of paper remaining on the paper roll in response to the transmit signal and the receive signal, the processor providing an output signal when the amount of paper remaining falls below a threshold.
摘要翻译： 用于感测纸卷上的纸的系统包括定位成与纸卷的外表面接触的超声换能器; 与所述超声波换能器通信的发射机电路，所述发射机电路向所述超声换能器提供发射信号，所述超声波换能器响应于所述发射信号产生超声波信号; 与所述超声波换能器通信的接收器电路，所述接收器电路提供表示来自所述纸卷的超声波返回回波的接收信号，所述超声波返回回波由所述超声波信号与所述纸卷相互作用; 以及与所述发射机电路和所述接收机电路通信的处理器电路，其响应于所述发射信号和所述接收信号来确定纸卷上剩余的纸张量，所述处理器在剩余纸张量时提供输出信号 低于阈值。
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公开(公告)号：US07669476B2
公开(公告)日：2010-03-02
申请号：US12193787
申请日：2008-08-19
IPC分类号： G01N3/32
CPC分类号： G01B17/02 , B41J11/0075 , B41J15/02 , B65H26/08 , B65H2553/30
摘要： A system for sensing paper on a paper roll includes an ultrasonic transducer positioned to be in contact with an outer surface of the paper roll; a transmitter circuit in communication with the ultrasonic transducer, the transmitter circuit providing a transmit signal to the ultrasonic transducer, the ultrasonic transducer generating an ultrasonic signal in response to the transmit signal; a receiver circuit in communication with the ultrasonic transducer, the receiver circuit providing a received signal indicative of an ultrasonic return echo from the paper roll, the ultrasonic return echo resulting from the ultrasonic signal interacting with the paper roll; and a processor circuit, in communication with the transmitter circuit and the receiver circuit, that determines an amount of paper remaining on the paper roll in response to the transmit signal and the receive signal, the processor providing an output signal when the amount of paper remaining falls below a threshold.
摘要翻译： 用于感测纸卷上的纸的系统包括定位成与纸卷的外表面接触的超声换能器; 与所述超声波换能器通信的发射机电路，所述发射机电路向所述超声换能器提供发射信号，所述超声波换能器响应于所述发射信号产生超声波信号; 与所述超声波换能器通信的接收器电路，所述接收器电路提供表示来自所述纸卷的超声波返回回波的接收信号，所述超声波返回回波由所述超声波信号与所述纸卷相互作用; 以及与所述发射机电路和所述接收机电路通信的处理器电路，其响应于所述发射信号和所述接收信号来确定纸卷上剩余的纸张量，所述处理器在剩余纸张量时提供输出信号 低于阈值。
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公开(公告)号：US20080059880A1
公开(公告)日：2008-03-06
申请号：US11464916
申请日：2006-08-16
申请人： Robert T. Cato , Thomas J. Sluchak
发明人： Robert T. Cato , Thomas J. Sluchak
IPC分类号： G06F3/00
CPC分类号： B62B3/1424 , B62B3/1408 , B62B3/1416 , G06F21/84 , G06F2221/2149
摘要： A method for controlling a display device, such as, for example, the display device mounted on a shopping cart, the shopping cart having a wheeled base and a basket portion in connection with the wheeled base and a handle in connection with the wheeled base, the method comprising: allowing a user to enter information at and obtain information from the display device; and providing a locking mechanism located on or implemented within the device for permitting the user to activate or deactivate the display device in order to prevent unauthorized access.
摘要翻译： 一种用于控制显示装置的方法，例如安装在购物车上的显示装置，具有轮式底座的购物车和与轮式底座相连的筐部分和与轮式底座相连的把手， 该方法包括：允许用户在显示设备上输入信息并从显示设备获取信息; 以及提供位于设备上或实现在设备内的锁定机构，以允许用户激活或停用显示设备，以防止未经授权的访问。
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公开(公告)号：US07464594B2
公开(公告)日：2008-12-16
申请号：US11534056
申请日：2006-09-21
IPC分类号： G01N3/32
CPC分类号： G01B17/02 , B41J11/0075 , B41J15/02 , B65H26/08 , B65H2553/30
摘要： A method for sensing paper on a paper roll is disclosed. The method comprises transmitting an ultrasonic signal into the paper roll and detecting an ultrasonic return echo transmit signal from the paper roll, the ultrasonic return echo transmit signal resulting from the ultrasonic signal interacting with the paper roll. Moreover, the method comprises determining an amount of paper remaining on the paper roll in response to the ultrasonic return echo transmit signal. Furthermore, the method may comprise indicating that the paper roll needs to be replaced in response to determining the amount of paper remaining on the paper roll.
摘要翻译： 公开了一种在纸卷上检测纸张的方法。 该方法包括：将超声波信号传送到纸卷中，并检测来自纸卷的超声波返回回波发射信号，超声回波发射信号是由超声信号与纸卷相互作用产生的。 此外，该方法包括响应于超声回波回波发射信号来确定纸卷上剩余的纸张量。 此外，该方法可以包括指示需要更换纸卷以响应于确定纸卷上剩余的纸张的量。
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公开(公告)号：US20080072672A1
公开(公告)日：2008-03-27
申请号：US11534056
申请日：2006-09-21
IPC分类号： G01N29/04
CPC分类号： G01B17/02 , B41J11/0075 , B41J15/02 , B65H26/08 , B65H2553/30
摘要： A system includes an ultrasonic transducer positioned to be in contact with the outer surface of a paper roll. The system further includes a transmitter circuit and a receiver circuit in communication with the ultrasonic transducer. The transmitter circuit provides a transmit signal to the ultrasonic transducer for generating an ultrasonic signal, which is transmitted into the paper roll. The receiver circuit provides a received signal indicative of an ultrasonic return echo from the paper roll. The ultrasonic return echo resulting from the ultrasonic signal interacting with the paper roll. The system also includes a processor circuit for determining an amount (length or diameter of roll) of paper remaining on the paper roll in response to the transmit signal and the receive signal. The processor provides an output signal when the amount of paper remaining falls below a threshold. A method of sensing paper on a paper roll is also presented. The method includes transmitting an ultrasonic signal into a paper roll and detecting an ultrasonic return echo from the paper roll. The ultrasonic return echo resulting from the ultrasonic signal interacting with the paper roll. The method further includes determining an amount of paper remaining on the paper roll in response to the ultrasonic return echo transmit signal.
摘要翻译： 系统包括定位成与纸卷的外表面接触的超声换能器。 该系统还包括与超声波换能器通信的发射机电路和接收机电路。 发射机电路向超声波换能器提供发射信号，用于产生传输到纸卷中的超声波信号。 接收器电路提供指示来自纸卷的超声回波回波的接收信号。 由超声波信号产生的超声回波回波与纸卷相互作用。 该系统还包括处理器电路，用于响应于发送信号和接收信号确定纸卷上残留的纸张的量（卷的长度或直径）。 当纸张剩余量低于阈值时，处理器提供输出信号。 还提出了在纸卷上感测纸张的方法。 该方法包括将超声波信号发送到纸卷中并从纸卷检测超声回波回波。 由超声波信号产生的超声回波回波与纸卷相互作用。 该方法还包括响应于超声回波回波发射信号来确定纸卷上剩余的纸张量。
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公开(公告)号：US5539394A
公开(公告)日：1996-07-23
申请号：US493847
申请日：1995-06-20
CPC分类号： G06K7/10346 , G06K17/0022 , G06K7/0008 , G06K7/10059 , G07G1/0054 , G08B13/2417 , G08B13/246 , G08B13/2471 , G08B13/2474 , G08B13/2482 , G08B13/2485 , G08B13/2488
摘要： Apparatus and method are disclosed for communicating between a central location and a plurality of identification tags or labels located in a container or in a space without separately passing each tag or labeled product through a read station. The disclosure includes use of hashing to reduce the amount of time needed to read the possible tags in the space. Reading is accomplished using radio communication with a combination of broadcast and time division multiplex architectures.
摘要翻译： 公开了用于在中央位置和位于容器或空间中的多个识别标签或标签之间进行通信的装置和方法，而无需通过读站单独地通过每个标签或标记的产品。 本公开包括使用散列来减少在空间中读取可能的标签所需的时间量。 使用具有广播和时分复用架构的组合的无线电通信来实现读取。
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公开(公告)号：US5255268A
公开(公告)日：1993-10-19
申请号：US830824
申请日：1992-02-04
CPC分类号： H04L12/4604
摘要： A data source on a main local area network (LAN) transmits broadcast messages via bridges to remote stations. A ring buffer in a bridge on the main LAN buffers a selected number of packets received from the data source. When the main bridge on the main LAN receives a "Lost Frame Message" from a remote bridge, not on the main LAN, the main bridge backs up to the address of the lost packet in the ring buffer, and retransmits the lost packet and then continues sequential transmission of subsequent packets. If buffer is, filled above a pre-set criteria, retransmission is slowed or stopped until buffer is mostly emptied.
摘要翻译： 主局域网（LAN）上的数据源通过网桥向远程站发送广播消息。 主LAN上的桥中的环形缓冲区缓冲从数据源接收到的选定数量的数据包。 当主局域网主桥接收远端网桥的“失帧消息”时，不在主局域网内，主桥将支持环形缓冲区中丢失的报文的地址，并重传丢失的报文， 继续连续发送后续数据包。 如果缓冲区被填充在预先设置的标准之上，则重新传输被减慢或停止，直到缓冲区大部分被清空。
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公开(公告)号：US5229593A
公开(公告)日：1993-07-20
申请号：US773356
申请日：1991-10-08
申请人： Robert T. Cato
发明人： Robert T. Cato
IPC分类号： G02B3/00 , H04B10/10 , H04B10/105 , H04B10/22 , H04B10/24
CPC分类号： H04B10/1125 , G02B3/00
摘要： A free space laser communication system operates at two power levels. The system includes a microprocessor to control the laser output beam to a safety level when the input beam indicates that the output beam is not being received at the remotely positioned terminal. If the output beam is not being received by the remotely positioned terminal, a blockage or misalignment of the beam is indicated. During normal operation when a blockage or misalignment of the beam is not detected, the output beam may be operated at a level higher than a safety limit to thereby provide enhanced communication performance.
摘要翻译： 自由空间激光通信系统在两个功率电平下工作。 该系统包括微处理器，用于当输入光束指示输出光束未在远程定位的终端处被接收时，将激光输出光束控制到安全水平。 如果输出光束未被远程定位的端子接收，则指示光束的阻塞或未对准。 在没有检测到光束的阻塞或未对准的正常操作期间，输出光束可以在高于安全限制的水平下操作，从而提供增强的通信性能。
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10.发明授权Optical scanner having multiple, simultaneous scan lines with different focal lengths 失效光学扫描仪具有多个具有不同焦距的同时扫描线
公开(公告)号：US4591242A
公开(公告)日：1986-05-27
申请号：US579634
申请日：1984-02-13
CPC分类号： G06K7/10871 , G06K2207/1013 , G06K2207/1018
摘要： An optical scanner uses frequency modulation and detection techniques to produce and utilize multiple, simultaneous scan patterns in which corresponding scan lines have different focal lengths. Two or more solid state lasers are modulated at unique frequencies. The frequency modulated output beams pass through different combinations of focusing lenses and are deflected by a single beam deflecting apparatus. Light reflected from any scanned object is detected. The resulting multi-frequency signal is applied to a plurality of bandpass filters to separate the returned signal into a plurality of separately decodable signals.
摘要翻译： 光学扫描器使用频率调制和检测技术来产生和利用多个同时的扫描图案，其中对应的扫描线具有不同的焦距。 两个或多个固态激光器以独特的频率进行调制。 频率调制输出光束通过聚焦透镜的不同组合，并被单个光束偏转装置偏转。 检测到从任何扫描对象反射的光。 所产生的多频信号被施加到多个带通滤波器，以将返回的信号分离成多个单独可解码的信号。
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