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    • 3. 发明申请
    • Network Providing Vehicles with Improved Traffic Status Information
    • 网络提供改善交通状况信息的车辆
    • US20100188265A1
    • 2010-07-29
    • US12692168
    • 2010-01-22
    • Lawrence W. HillMilt Baker
    • Lawrence W. HillMilt Baker
    • G08G1/09
    • G08G1/096791G08G1/0112G08G1/0133G08G1/0141G08G1/091G08G1/096716G08G1/096775G08G1/096783G08G1/162
    • A vehicle communication network provides information about traffic conditions in a local area on a near real time basis. An RF transceiver in a vehicle communicates with other transceivers in other vehicles to relay traffic condition related information. The traffic information can be provided to local vehicles equipped with transceivers, or roadside devices that participate in the communication network. The traffic information is derived from data that may include time, position, velocity, acceleration or other information related to traffic flow. The data can be derived from a GPS, accelerometer or other devices that are typically prevalent in automobiles, whether as standalone units or integrated into the automobile. The transceivers can implement an emergency messaging construct to permit rapid dissemination of traffic information that may be derived from collisions, slowdowns, congestion or other traffic conditions that may prompt drivers to slowdown or otherwise increase vehicle spacing. The vehicle network can be implemented using add-on equipment in conjunction with PNDs or smart cellular telephones, or as a standalone device that is optionally integrated into a PND or vehicle.
    • 车辆通信网络以近实时的方式提供关于局部区域中的交通状况的信息。 车辆中的RF收发器与其他车辆中的其他收发器通信以中继交通状况相关信息。 交通信息可以提供给配备有收发器的本地车辆,或参与通信网络的路边设备。 交通信息是从可能包括时间,位置,速度,加速度或与交通流量相关的其他信息的数据导出的。 数据可以从GPS,加速度计或其他通常在汽车中流行的装置得出,无论是作为独立装置还是集成到汽车中。 收发器可以实施紧急消息传送结构,以允许快速传播可能导致的冲突,减速,拥塞或其他交通状况的交通信息,这些交通信息可能促使驾驶员减速或以其他方式增加车辆间距。 车辆网络可以使用附加设备与PND或智能蜂窝电话一起实施,或者作为可选地集成到PND或车辆中的独立设备来实现。
    • 4. 发明授权
    • Transmission line termination of guide-communications wire for guided
vehicles
    • 引导通信导线的输电线路终端
    • US5257290A
    • 1993-10-26
    • US309272
    • 1989-02-10
    • Lawrence W. HillFrederick W. Sarles
    • Lawrence W. HillFrederick W. Sarles
    • G05D1/02H04B3/56H04B5/00H04L12/40H04K1/10
    • H04B5/0012G05D1/0265H04B3/56H04L12/40H04B2203/5425H04B2203/5483H04B2203/5491H04L2012/40273
    • A system for digital communication over a wire lain along the path of guided vehicles to a modem and a loop driver, the modem providing high frequency signals and the loop driver providing low frequency control signals. Instead, the modem and the loop driver are connected to one end of the wire and the other end of the wire is connected through an impedance matching network to earth ground. The impedance matching network provides an impedance approximately equal to the impedance of the wire at the frequency of the high frequency signals. The impedance matching network may conveniently comprise an inductor (choke) in parallel with a capacitor connected between the end of the wire and earth ground and a plurality of resistors connected in parallel with said inductor and capacitor. The resistors are selectively clipped to eliminate the echo bringing the impedance of the impedance matching network to approximate equality with the impedance of the wire at the frequency of the high frequency signals. Alternatively, a single loop connected in the ordinary way to the modem and loop driver, may be cut to form two separate wires and two separate impedance networks provided one at each end of the wires to earth ground.
    • 用于通过导线进行的数字通信的系统沿着导向车辆的路径向调制解调器和环路驱动器提供,调制解调器提供高频信号和提供低频控制信号的环路驱动器。 相反,调制解调器和环路驱动器连接到电线的一端,并且电线的另一端通过阻抗匹配网络连接到接地。 阻抗匹配网络提供的阻抗近似等于在高频信号频率处的导线的阻抗。 阻抗匹配网络可以方便地包括与连接在导线和接地端的端部之间的电容器并联的电感器(扼流圈)和与所述电感器和电容器并联连接的多个电阻器。 选择性地限制电阻器以消除使阻抗匹配网络的阻抗在高频信号的频率处与电线的阻抗近似相等的回波。 或者,以普通方式连接到调制解调器和环路驱动器的单个环路可以被切割以形成两条单独的线路和两条单独的阻抗网络,这些网络在电线的每一端提供一个到大地。
    • 5. 发明授权
    • Spread spectrum-time diversity communications systems and transceivers
for multidrop area networks
    • 用于多区域网络的频谱时间分集通信系统和收发器
    • US5168510A
    • 1992-12-01
    • US333336
    • 1989-04-05
    • Lawrence W. Hill
    • Lawrence W. Hill
    • G05D1/02G06F11/00H03G3/00H04B1/69H04B1/713H04B1/715H04B1/7156H04B3/54H04B3/56H04B5/00H04B7/06H04B7/12H04J13/00H04L1/02H04L12/40
    • G05D1/0265H03G3/001H03G3/002H04B1/69H04B1/713H04B1/715H04B3/54H04B3/56H04B7/0671H04B7/12H04J13/00H04L1/02G06F11/076H04B2001/7152H04B2001/71563H04B2203/5408H04B2203/5416H04B2203/5425H04B2203/5441H04B2203/5445H04B2203/5483H04B2203/5487H04B2203/5491H04B2203/5495
    • Messages are transmitted on pairs of frequencies that are orthogonal, that is the frequencies have no least common denominator (are prime to each other). A message is transmitted on the first of the pair of frequencies and, simultaneously, its complement is transmitted on the second of said pair of frequencies. The message is then retransmitted on another pair of orthogonal frequencies. In the second transmission, the message is remapped, such that, adjacent bits in the first transmission are not adjacent in the second transmission and the same bit in the first transmission and the second transmission are not spaced 1/120th of a second apart. Information is collected on the data error rates at each receiver. This information is periodically transmitted to a central frequency controller which collects this error information and determines the error rates on the frequencies being used. A hill-climbing technique is used to choose pairs of frequencies having the lowest current data error rates. The frequency controller transmits the identity of these frequencies to the various transceivers in each message. The transceivers comprise a frequency controlled carrier frequency generator, appropriate data keying for the carrier, a pair of digital state machines, each having a frequency controlled filter connected thereto, appropriate microprocessors for control and broad band coupling networks for coupling the transceiver to a communications channel, which may be an AC power line, a private line, the floor loop of an automatic guided vehicle system, or the like.
    • 消息是在正交频率对上发送的,即频率具有最小的共同特征(彼此相同)。 在该对频率中的第一对发送消息,并且同时,在所述频率对中的第二个频率上发送消息。 然后在另一对正交频率上重传该消息。 在第二传输中,消息被重新映射,使得第一传输中的相邻位在第二传输中不相邻,并且第一传输和第二传输中的相同位不间隔1/120秒。 收集每个接收机的数据错误率信息。 该信息被周期地发送到收集该错误信息并确定所使用频率上的错误率的中央频率控制器。 爬坡技术用于选择具有最低当前数据错误率的频率对。 频率控制器将这些频率的身份发送到每个消息中的各种收发器。 收发器包括频率控制的载波频率发生器,用于载波的适当的数据密钥,一对数字状态机,每个具有连接到其上的频率控制滤波器,用于控制的合适的微处理器和用于将收发器耦合到通信信道的宽带耦合网络 ,其可以是AC电力线,专用线路,自动引导车辆系统的地板回路等。
    • 6. 发明申请
    • Inventory control and communication system
    • 库存控制和通信系统
    • US20080183599A1
    • 2008-07-31
    • US12006797
    • 2008-01-04
    • Gordon W. HillJohn D. LloydLawrence W. HillMatthew M. Besen
    • Gordon W. HillJohn D. LloydLawrence W. HillMatthew M. Besen
    • G06Q10/00
    • G06Q10/087G06Q99/00
    • An inventory control and communication system provides automated real-time control of stock levels and ordering in a timely manner so that optimal stock levels are maintained. An inventory sensor that includes a storage unit, or bin, for each stock item or inventory object. One or more transducers are associated with each storage unit to produce a mass/weight signal indicative of the weight of the stock items stored in or at the corresponding storage unit. The signals are transmitted to a computer associated with the inventory sensor, which determines the weight and the number of the inventory objects present in the bin and provides this data as part of the inventory data associated with the inventory object. The inventory data is provided to a host computer that maintains information about the inventory sensor location and the corresponding stock item, such as item weight and supplier information. Threshold values for the minimum and maximum quantity of each stock item are also maintained by the host computer. When the quantity of a stock item reaches the minimum threshold, the host computer is operative to send an order to the supplier to restore the stock item to the maximum quantity threshold, or otherwise indicates that a reorder is needed.
    • 库存控制和通信系统提供库存水平的自动实时控制和及时订购,以保持最佳库存水平。 一种库存传感器,其包括用于每个库存物品或库存物体的存储单元或仓。 一个或多个传感器与每个存储单元相关联,以产生指示存储在相应存储单元中的存储物品的重量的质量/重量信号。 这些信号被传送到与库存传感器相关联的计算机,该计算机确定存储在仓中的库存对象的权重和数量,并将该数据作为与库存对象相关联的库存数据的一部分提供。 库存数据被提供给主计算机,该计算机维护有关库存传感器位置和相应库存项目的信息,例如料品重量和供应商信息。 每个库存物品的最小和最大数量的阈值也由主机维护。 当库存项目的数量达到最小阈值时,主计算机可操作地向供应商发送订单以将库存项目恢复到最大数量阈值,或者指示需要重新排序。
    • 7. 发明授权
    • Frequency hopping time-diversity communications systems and transceivers
for local area networks
    • 用于局域网的跳频时分集成通信系统和收发器
    • US5448593A
    • 1995-09-05
    • US920110
    • 1992-07-24
    • Lawrence W. Hill
    • Lawrence W. Hill
    • G05D1/02G06F11/00H03G3/00H04B1/713H04B3/54H04B3/56H04B5/00H04B7/06H04B7/12H04J13/00H04L1/02H04L12/40H04B7/02
    • H04J13/00G05D1/0265H03G3/001H03G3/002H04B1/69H04B1/713H04B1/715H04B3/54H04B3/56H04B7/0671H04B7/12H04L1/02G06F11/076H04B2001/7152H04B2001/71563H04B2203/5408H04B2203/5416H04B2203/5425H04B2203/5445H04B2203/5483H04B2203/5495
    • A system utilizing adaptive frequency-hopped spread spectrum modulation to communicate over AC power lines and other noisy communications channels is described. The system employs a modulation structure in which individual packets of data are transmitted with FSK modulation using two frequencies chosen from a larger set. An error coding system is used which provides a controlling microprocessor with data on the quality of reception at each transceiver in the network; this information is used to alter the gain of the receiver, the bit rate of the transmission, and the specific frequencies employed by the network, in real time, to optimize communication error rate. Messages are organized in packets. A Master transceiver, controlling network management, transmits channel control information to other transceivers on the network, enabling system synchronization, acquisition of an existing network by new subscribers, and changes to the bit rate and frequency set in use. Each transceiver comprises a frequency controlled carrier generator, appropriate data keying for the carrier, a pair of digital detectors each having a frequency controlled bandpass filter connected thereto, appropriate microprocessors for control and broad band coupling networks for coupling the transceiver to a communications channel, which may be an AC power line, a private line, the floor loop of an automatic guided vehicle system, or the like.
    • 描述了利用自适应跳频扩频调制在交流电力线和其它噪声通信信道上通信的系统。 该系统采用调制结构,其中使用从较大集合中选择的两个频率以FSK调制方式发送各个数据包。 使用错误编码系统,其向控制微处理器提供关于网络中每个收发器处的接收质量的数据; 该信息用于实时改变接收机的增益,传输的比特率和网络采用的特定频率,以优化通信错误率。 消息以数据包的形式组织。 控制网络管理的主收发器将信道控制信息发送到网络上的其他收发器,实现系统同步,新用户对现有网络的采集,以及使用中设置的比特率和频率的变化。 每个收发器包括频率控制的载波发生器,用于载波的适当数据密钥,一对数字检测器,每个具有连接到其上的频率受控带通滤波器,用于控制的合适的微处理器和用于将收发器耦合到通信信道的宽带耦合网络, 可以是AC电源线,专用线,自动导引车辆系统的地板回路等。
    • 8. 发明授权
    • Transceiver for multi-drop local area networks
    • 收发器用于多点局域网
    • US4597082A
    • 1986-06-24
    • US586863
    • 1984-03-06
    • Lawrence W. HillFrederick W. Sarles
    • Lawrence W. HillFrederick W. Sarles
    • H04B3/56H04L12/40G08C25/02G06F11/00H04L27/06
    • H04L12/403H04B3/56H04L12/40H04B2203/5408H04B2203/5416H04B2203/5425H04B2203/5445H04B2203/5483H04B2203/5491H04B2203/5495
    • A multi-drop local area network utilizes alternating current power lines as a transmission channel. Identical transceivers are used as a master and as up to 255 slaves. Each transceiver comprises modulator and demodulator units and a microprocessor control unit which may be connected to a host. The modulator and demodulator are connected to the alternating current power line through a high pass filter comprising a split bobbin, iron core transformer having an air gap which also provides impedance matching. The demodulator includes a clipper and analog circuitry providing a band pass filter and generating a square wave corresponding to the received carrier. A state machine acting as a digital filter produces a received carrier signal only when each half cycle of the carrier square wave is of the proper duration and the carrier signal has existed for slightly more than one half of the transmitted bit duration, which is a predetermined number of carrier cycles.The microprocessors are programmed to provide for block ahead acknowledgment, alternate transmissions between master and slaves; each block message comprises an acknowledgment non-acknowledgment bit, a message sequence bit, a polling sequence bit, and a longitudinal redundancy check. The carrier frequency utilized lies in the range of 20 to 40 KHz and preferably within the range between 27 and 33 KHz for a power line transmission channel. Error free 1200 Baud transmission rates are achieved in full duplex. Higher carrier frequencies and transmission rates are possible over less noisy transmission channels such as wire pairs.
    • 多点局域网利用交流电力线作为传输通道。 相同的收发器用作主机,最多可使用255个从机。 每个收发器包括调制器和解调器单元以及可以连接到主机的微处理器控制单元。 调制器和解调器通过高通滤波器连接到交流电源线,该高通滤波器包括具有气隙的分体绕线管,铁心变压器,其也提供阻抗匹配。 解调器包括一个限幅器和模拟电路,它提供一个带通滤波器,并产生一个对应于接收到的载波的方波。 作为数字滤波器的状态机仅在载波方波的每个半周期处于适当的持续时间时产生接收的载波信号,并且载波信号已经存在于发送的比特持续时间的稍大一半以上,这是预定的 载波周期数。 微处理器被编程为提供前导确认,主机和从机之间的交替传输; 每个块消息包括确认非确认位,消息序列位,轮询序列位和纵向冗余校验。 对于电力线传输通道,所使用的载波频率在20至40KHz的范围内,优选在27至33KHz的范围内。 全双工可实现1200波特率传输速率。 较高的载波频率和传输速率可能通过较不噪声的传输信道,如线对。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR DETERMINATION OF POSITION
    • 用于确定位置的系统和方法
    • US20090149202A1
    • 2009-06-11
    • US12328343
    • 2008-12-04
    • Lawrence W. HillChristian Steele
    • Lawrence W. HillChristian Steele
    • H04W4/02G01P15/00G01S1/00
    • G01S5/0289G01S5/18
    • A system and method of determining and reporting on the position of a wireless device relative to a group of other wireless devices dispersed within a specified geographic area. The system includes at least one Query Unit, three or more Responding Units disposed at determinable locations within the specified geographic area, and one or more Mobile Units, which may correspond to additional Responding Units or units that function only as receivers. The Query Unit sequentially queries the Responding Units, and, responsive to the respective query messages, the Responding Units transmit corresponding response messages. One or more of the Mobile Units receive the query and response messages, and generate, for each query-response message pair, a set of time-difference-of-arrival (TDOA) measurements, which are used by the Mobile Units to determine their positions relative to the Responding Units. The Mobile Units record the times-of-arrival (TOAs) of the query message and the response messages at their respective receivers, and calculate the TDOAs based on the recorded TOAs. The TDOAs are then analyzed to determine the time differences due to the differences in lengths of the respective message propagation paths. The position of each Mobile Unit can then be computed using computation techniques typically employed in Long Range Navigation (LORAN) receivers, or any other suitable computation technique.
    • 一种确定和报告无线设备相对于分散在指定地理区域内的一组其他无线设备的位置的系统和方法。 该系统包括至少一个查询单元,设置在指定地理区域内的可确定位置处的三个或更多个响应单元,以及可以对应于仅用作接收器的附加响应单元或单元的一个或多个移动单元。 查询单元顺序地查询响应单元,并且响应于相应的查询消息,响应单元发送相应的响应消息。 一个或多个移动单元接收查询和响应消息,并且为每个查询响应消息对生成一组到达时间差(TDOA)测量值,移动单元用于确定它们 相对于响应单位的位置。 移动单元在其各自的接收机处记录查询消息的到达时间(TOA)和响应消息,并基于记录的TOA计算TDOA。 然后分析TDOA以确定由于各个消息传播路径的长度差异引起的时间差异。 然后可以使用通常在长距离导航(LORAN)接收机中使用的计算技术或任何其它合适的计算技术来计算每个移动单元的位置。