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    Vehicle tracking, communication and fleet management system
    3.
    发明申请
    Vehicle tracking, communication and fleet management system 审中-公开
    车辆跟踪，通信和车队管理系统

    公开(公告)号：US20090088924A1

    公开(公告)日：2009-04-02

    申请号：US12313650

    申请日：2008-11-20

    申请人： John R. Coffee ,  David A. Dye ,  Robert W. Lewis ,  Kevin M. Marvin ,  Robert D. Sleeper

    发明人： John R. Coffee ,  David A. Dye ,  Robert W. Lewis ,  Kevin M. Marvin ,  Robert D. Sleeper

    IPC分类号： G08G1/127

    CPC分类号： B60P3/03 ,  B28C5/422 ,  B28C7/02 ,  B28C7/028 ,  B28C9/00 ,  G01M17/00 ,  G07C5/008 ,  G08G1/20 ,  H04W8/245 ,  H04W16/14 ,  H04W28/22 ,  H04W56/0085 ,  H04W64/00 ,  H04W72/10 ,  H04W74/04 ,  H04W84/00

    摘要： A vehicle fleet management information system identifies location and direction of movement of each vehicle in a fleet in real-time, and automatically reports such information, as well as status of predetermined events in which the vehicle is engaged, directly to the fleet manager. Each fleet vehicle has an assigned time slot to transmit its reporting information over a communications network without interfering with transmissions from other vehicles in their own respective time slots. A timing control phase lock loop (PLL) provides precise time synchronization for timing corrections from a global positioning system (GPS) based time reference. A dual band full-duplex interface of the network has TDMA on one-half and broadcast on the other half. Microprocessor time processing units in components of the network perform precise clock synchronization. Space diversity performed on received vehicle transmitted messages avoids data corruption. Different vehicles have different periodic transmission intervals, by dynamically allocating the slots for various update rates. Auxiliary reporting slots enable prompt reporting of important data by the respective vehicle transmitters independent of the slower periodic transmission intervals.

    摘要翻译： 车队管理信息系统实时识别车辆中每辆车辆的位置和方向，并自动将车辆所参与的这些信息以及预定事件的状态直接报告给车队经理。 每个车队车辆具有分配的时隙，以通过通信网络传送其报告信息，而不干扰其各自时间段内的其他车辆的传输。 定时控制锁相环（PLL）为来自全球定位系统（GPS）的时间基准的定时校正提供精确的时间同步。 网络的双频全双工接口在一半上具有TDMA，在另一半上进行广播。 网络组件中的微处理器时间处理单元执行精确的时钟同步。 对接收到的车辆传输的消息执行的空间分集避免了数据的破坏。 不同的车辆具有不同的周期性传输间隔，通过动态地分配各种更新速率的时隙。 辅助报告插槽使得能够独立于较慢周期性传输间隔的各个车辆发射机迅速报告重要数据。

    Traffic distribution analysis in a land mobile radio system
    5.
    发明授权
    Traffic distribution analysis in a land mobile radio system 失效
    陆地移动无线电系统中的交通分布分析

    公开(公告)号：US5913177A

    公开(公告)日：1999-06-15

    申请号：US829682

    申请日：1997-03-31

    申请人： Sheldon Kent Meredith ,  David A. Dye

    发明人： Sheldon Kent Meredith ,  David A. Dye

    IPC分类号： H04B17/00 ,  H04B7/26 ,  H04M3/36 ,  H04W16/28 ,  H04B1/38 ,  H04M1/00

    CPC分类号： H04W16/28 ,  H04M3/36

    摘要： In a system for interconnecting a plurality of radio channel units in a single trunk group with a plurality of directional antennas and/or antenna beams, each radio channel unit has a receive section and a transmit section and the system dynamically connects the receive and transmit sections of each one of the radio channel units with any one of the plurality of antennas which, on average during a sampling period, is best suited for receiving and transmitting RF signals at the operating frequency of the radio channel unit. The system further includes traffic distribution monitor for monitoring, storing and displaying information on a periodic basis indicative of the usage of each antenna and/or antenna beam. The specific antenna or antenna beam being utilized by a radio channel unit is monitored on a periodic basis during communications between the radio channel unit and a mobile radio unit, and this information is stored in a memory associated with the radio channel unit.

    摘要翻译： 在用于将单个中继线群中的多个无线电信道单元与多个定向天线和/或天线波束互连的系统中，每个无线电信道单元具有接收部分和发射部分，并且系统动态地连接接收和发射部分 每个无线电信道单元中的每一个与所述多个天线中的任何一个天线平均地在采样周期期间最适合于在无线电信道单元的操作频率处接收和发送RF信号。 该系统还包括用于监视，存储和显示周期性地指示每个天线和/或天线波束的使用的信息的交通分配监视器。 在无线电信道单元和移动无线电单元之间的通信期间，由无线电信道单元利用的特定天线或天线波段在周期性的基础上被监视，并且该信息被存储在与无线电信道单元相关联的存储器中。

    Continuous interference assessment and avoidance in a land mobile radio system
    6.
    发明授权
    Continuous interference assessment and avoidance in a land mobile radio system 失效
    陆地移动无线电系统中的连续干扰评估和避免

    公开(公告)号：US06052605A

    公开(公告)日：2000-04-18

    申请号：US834818

    申请日：1997-03-31

    申请人： Sheldon Kent Meredith ,  David A. Dye

    发明人： Sheldon Kent Meredith ,  David A. Dye

    IPC分类号： H04B7/26 ,  H04W16/24 ,  H04W72/08 ,  H04B1/10 ,  H04B1/38 ,  H04M1/00

    CPC分类号： H04W72/082 ,  H04W16/24

    摘要： In a land mobile radio system including at least one base site having a system for interconnecting a plurality of radio channel units with a plurality of directional antennas and/or antenna beams, the base site further includes an interference avoidance system for controlling communications between each radio channel unit of the base site and mobile radio units communicating with the base site so as to avoid causing potential interference at the operating frequency of each radio channel unit at other base sites. The interference avoidance system monitors potential interference at the operating frequency of each radio channel unit on each antenna beam. If potential interference exists on an antenna beam determined to be the antenna beam best suited for transmitting and receiving signals at the operating frequency of the radio channel unit, a determination is made if adjacent antenna beams have reduced chance of potential interference and sufficient signal strength for communication and therefore are better suited for transmitting signals at the operating frequency of the radio channel unit. To further enhance interference avoidance, a comparison is made of the signal strength of received signals at the operating frequency of the radio channel unit with one or more threshold values to assess the proximity of the mobile radio unit to the base site, and the transmission signal strength for signals transmitted from the radio channel unit to the mobile radio unit are controlled based on the proximity assessment.

    摘要翻译： 在包括具有用于使多个无线电信道单元与多个定向天线和/或天线波束互连的系统的至少一个基站的陆地移动无线电系统中，基站还包括用于控制每个无线电之间的通信的干扰避免系统 基站的通道单元和与基站通信的移动无线单元，以避免在其他基站处的每个无线电信道单元的工作频率处引起潜在的干扰。 干扰避免系统监测每个天线波束上每个无线电信道单元的工作频率的潜在干扰。 如果在被确定为最适于在无线电信道单元的工作频率处发送和接收信号的天线波束的天线波束上存在潜在干扰，则确定相邻天线波束是否具有降低的潜在干扰机会和足够的信号强度 因此更适于在无线电信道单元的工作频率处发送信号。 为了进一步增强干扰避免，比较具有一个或多个阈值的无线电信道单元的工作频率处的接收信号的信号强度，以评估移动无线电单元与基站的接近度，并且传输信号 基于接近度评估来控制从无线信道单元发送到移动无线电单元的信号的强度。

    Electronic muffler
    7.
    发明授权
    Electronic muffler 失效
    电子消声器

    公开(公告)号：US5457749A

    公开(公告)日：1995-10-10

    申请号：US172506

    申请日：1993-12-22

    申请人： John A. Cain ,  Dennis H. Barnes ,  David A. Dye

    发明人： John A. Cain ,  Dennis H. Barnes ,  David A. Dye

    IPC分类号： F01N1/06 ,  F01N1/20 ,  F01N1/22 ,  H03B29/00

    CPC分类号： F01N1/22 ,  F01N1/065 ,  F01N1/20 ,  G10K2210/32272

    摘要： An electronic muffling device is disclosed for suppressing the noise emitted by an outlet of an exhaust pipe of an engine. The device comprises a housing having an outlet and a plurality of audio transducers. The transducers supply anti-noise to cancel detected unwanted noise. A microphone appropriately positioned to detect residual noise is coupled to a cancellation signal generator, which controls the anti-noise generated by the transducers. Anti-noise and unwanted engine noise propagate through a front volume within the housing so that exhaust gases are transmitted through the housing, but engine noise is canceled before leaving the housing. Exhaust gas may be transmitted into the housing, or may be passed through the housing without leaving the exhaust pipe. In either embodiment, engine noise enters the front volume and is canceled.

    摘要翻译： 公开了一种用于抑制由发动机的排气管的出口发出的噪声的电子消声装置。 该装置包括具有出口和多个音频换能器的壳体。 传感器提供抗噪声以消除检测到的不必要的噪声。 适于定位以检测残余噪声的麦克风耦合到消除信号发生器，其消除由换能器产生的抗噪声。 防噪声和不需要的发动机噪声通过壳体内的前部音量传播，使得废气通过壳体传播，但在离开壳体之前取消了发动机噪音。 废气可以传送到壳体中，或者可以通过壳体而不离开排气管。 在任一实施例中，发动机噪声进入前部体积并被取消。

    Single cavity automobile muffler
    8.
    发明授权
    Single cavity automobile muffler 失效
    单腔汽车消音器

    公开(公告)号：US5272286A

    公开(公告)日：1993-12-21

    申请号：US879517

    申请日：1992-05-04

    申请人： John J. Cain ,  Dennis Barnes ,  David A. Dye

    发明人： John J. Cain ,  Dennis Barnes ,  David A. Dye

    IPC分类号： F01N1/06 ,  F01N1/20 ,  F01N1/22

    CPC分类号： F01N1/22 ,  F01N1/065 ,  F01N1/20 ,  G10K2210/32272

    摘要： A noise suppression system for use on internal combustion engines and small enough for use in automotive applications is disclosed. A cancellation noise generator and actuator speakers produce a noise to combine with and cancel the engine noise carried in exhaust gases in a mixing chamber. The resultant noise leaving the mixing chamber is measured by a circular tubular microphone array to control the noise generator.

    摘要翻译： 公开了一种用于内燃机并且足够小以用于汽车应用的噪声抑制系统。 消除噪声发生器和致动器扬声器产生噪声以与混合室中的废气中携带的发动机噪声结合并消除。 通过圆形管状麦克风阵列测量离开混合室的合成噪声，以控制噪声发生器。