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1. 发明申请

US20100022202A1 TRANSCEIVER REDUNDANCY IN AN ELECTRONIC TOLL COLLECTION SYSTEM 有权
标题翻译：收发机在电子收集系统中的冗余
公开(公告)号：US20100022202A1
公开(公告)日：2010-01-28
申请号：US12571033
申请日：2009-09-30
申请人： Thua Van Ho , Daniel Terrier , Roger Tong , Wai-Cheung Tang , Japjeev Kohli
发明人： Thua Van Ho , Daniel Terrier , Roger Tong , Wai-Cheung Tang , Japjeev Kohli
IPC分类号： H04B1/44
CPC分类号： G07B15/063 , G07B15/06
摘要： An electronic toll collection system wherein the reader includes a switching network and a plurality of transceivers operating under the control of a controller. The reader further includes failure detection circuitry for determining whether any of the transceivers have failed based upon the RF outputs of the transceivers. If the controller determines that a transceiver has failed, then it alters the switching pattern such that the switching network excludes the failed transceiver from being connected to the antennas. The reader thereby provides for adaptive RF channel assignment, as the particular transceiver used to excite a particular antenna may be dynamically altered, and the provision of at least two transceivers in the reader ensures transceiver redundancy.
摘要翻译：一种电子收费系统，其中读取器包括在控制器的控制下操作的交换网络和多个收发器。读取器还包括故障检测电路，用于基于收发器的RF输出来确定是否有任何收发器发生故障。如果控制器确定收发器出现故障，则它改变切换模式，使得交换网络排除故障收发器连接到天线。因此，读取器提供了自适应RF信道分配，因为用于激发特定天线的特定收发机可以被动态地改变，并且在读取器中提供至少两个收发器确保收发机冗余。

2. 发明授权

US07813699B2 Transceiver redundancy in an electronic toll collection system 有权
标题翻译：收发机冗余在电子收费系统中
公开(公告)号：US07813699B2
公开(公告)日：2010-10-12
申请号：US12571033
申请日：2009-09-30
申请人： Thua Van Ho , Daniel Terrier , Roger Tong , Wai-Cheung Tang , Japjeev Kohli
发明人： Thua Van Ho , Daniel Terrier , Roger Tong , Wai-Cheung Tang , Japjeev Kohli
IPC分类号： H04B7/00
CPC分类号： G07B15/063 , G07B15/06
摘要： An electronic toll collection system wherein the reader includes a switching network and a plurality of transceivers operating under the control of a controller. The reader further includes failure detection circuitry for determining whether any of the transceivers have failed based upon the RF outputs of the transceivers. If the controller determines that a transceiver has failed, then it alters the switching pattern such that the switching network excludes the failed transceiver from being connected to the antennas. The reader thereby provides for adaptive RF channel assignment, as the particular transceiver used to excite a particular antenna may be dynamically altered, and the provision of at least two transceivers in the reader ensures transceiver redundancy.
摘要翻译：一种电子收费系统，其中读取器包括在控制器的控制下操作的交换网络和多个收发器。读取器还包括故障检测电路，用于基于收发器的RF输出来确定是否有任何收发器发生故障。如果控制器确定收发器出现故障，则它改变切换模式，使得交换网络排除故障收发器连接到天线。因此，读取器提供了自适应RF信道分配，因为用于激发特定天线的特定收发机可以被动态地改变，并且在读取器中提供至少两个收发器确保收发机冗余。

3. 发明授权

US07385525B2 Dynamic timing adjustment in an electronic toll collection system 有权
标题翻译：电子收费系统动态时序调整
公开(公告)号：US07385525B2
公开(公告)日：2008-06-10
申请号：US11176758
申请日：2005-07-07
申请人： Thua Van Ho , Roger Tong , Wal-Cheung Tang , Daniel Terrier , Martin Capper
发明人： Thua Van Ho , Roger Tong , Wal-Cheung Tang , Daniel Terrier , Martin Capper
IPC分类号： G08G1/00
CPC分类号： G08G1/042 , G07B15/063 , G08G1/015
摘要： An electronic toll collection system with dynamically adjusted timing for operation of one or more subsystems. The timing is dynamically adjusted based upon the prevailing traffic speed for the roadway. The roadway traffic speed is determined based upon direct measurements of traffic speed by external equipment or based upon a variable correlated with traffic speed. The variable may include the average number of handshakes per transponder over an estimation period. The subsystem may include a vehicle position determination system, an enforcement system, a loop detection system, or other such subsystems.
摘要翻译：一种具有动态调整的一个或多个子系统运行时序的电子收费系统。根据道路的主要交通速度动态调整时间。基于外部设备的交通速度的直接测量或基于与交通速度相关的变量来确定道路交通速度。该变量可以包括每个转发器在估计期间的平均握手次数。子系统可以包括车辆位置确定系统，执行系统，环路检测系统或其他这样的子系统。

4. 发明授权

US07388501B2 Method of enabling two-state operation of electronic toll collection system 有权
标题翻译：实现电子收费系统两国运作的方法
公开(公告)号：US07388501B2
公开(公告)日：2008-06-17
申请号：US11437236
申请日：2006-05-19
申请人： Wai-Cheung Tang , Thua Van Ho
发明人： Wai-Cheung Tang , Thua Van Ho
IPC分类号： G08B13/14
CPC分类号： G06K19/0723 , G06K7/10346
摘要： A method and system for communicating state information from a transponder to a reader. The transponder outputs linearly polarized RF signals having either a first polarization, such as horizontal, or a second polarization, such as vertical. The polarization is selected so as to indicate a first state or a second state. The reader detects whether received RF signals have the first polarization or the second polarization, and thereby determines the state of the transponder. In some embodiments, the reader may include two linearly polarized antennas, one with the first polarization and one with the second polarization, for receiving the RF signals from the transponder and determining the polarization of the received RF signals. The system may be implemented within an electronic toll collection system, wherein the transponders are affixed to the interior of vehicle windshields using a rotatable mounting mechanism having two selectable positions.
摘要翻译：一种用于将状态信息从应答器传送到读取器的方法和系统。转发器输出具有诸如水平的第一极化或诸如垂直的第二极化的线性偏振RF信号。选择极化以指示第一状态或第二状态。读取器检测接收的RF信号是否具有第一极化或第二极化，从而确定应答器的状态。在一些实施例中，读取器可以包括两个线性极化天线，一个具有第一偏振的天线，另一个具有第二极化，用于从应答器接收RF信号并确定所接收的RF信号的极化。该系统可以在电子收费系统内实现，其中应答器使用具有两个可选位置的可旋转安装机构固定在车辆挡风玻璃的内部。

5. 发明申请

US20080278347A1 ELECTRONIC TOLL COLLECTION SYSTEM WITH MULTI-BEAM ANTENNAS 审中-公开
标题翻译：具有多光束天线的电子收集系统
公开(公告)号：US20080278347A1
公开(公告)日：2008-11-13
申请号：US12117902
申请日：2008-05-09
申请人： Thua Van Ho , Wai-Cheung Tang
发明人： Thua Van Ho , Wai-Cheung Tang
IPC分类号： G08G1/00
CPC分类号： G07B15/063
摘要： An ETC system that uses lane-based phased array antennas to create both wide zone coverage areas upstream of the toll location and narrow zone coverage areas to complete transaction processing and vehicle location functions at the toll location. The phased array antennas are partly directed upstream with respect to the direction of travel in the roadway and they are each positioned to create a series of coverage areas generally parallel to the direction of travel and generally centered within a laneway.
摘要翻译：使用基于车道的相控阵天线的ETC系统在收费位置和窄区域覆盖区域的上游创建宽区域覆盖区域，以在收费位置完成交易处理和车辆位置功能。相控阵天线相对于道路中的行进方向部分地指向上游，并且它们各自定位成产生一系列覆盖区域，该区域通常平行于行进方向并且通常以巷道为中心。

6. 发明授权

US07342500B2 Compact microstrip transponder antenna 有权
标题翻译：紧凑型微带应答器天线
公开(公告)号：US07342500B2
公开(公告)日：2008-03-11
申请号：US11388737
申请日：2006-03-24
申请人： Thua Van Ho , Wai-Cheung Tang
发明人： Thua Van Ho , Wai-Cheung Tang
IPC分类号： G08B13/14
CPC分类号： H01Q1/38 , H01Q1/2225 , H01Q9/42 , H01Q23/00
摘要： A transponder formed on a circuit substrate having a longitudinal axis and a transverse axis. An antenna is disposed on one side of a transverse axis, extending in a longitudinal direction, and the remaining circuit components are disposed on the other side of the transverse axis. The remaining circuit components may include a controller, an RF transceiver, and a battery. A ground plane defines an antenna space within which the antenna is disposed.
摘要翻译：形成在具有纵向轴线和横向轴线的电路基板上的应答器。天线设置在横向轴线的一个纵向方向上延伸的一侧，其余电路部件设置在横轴的另一侧。剩余的电路组件可以包括控制器，RF收发器和电池。接地平面定义天线设置在其内的天线空间。

7. 发明申请

US20070268140A1 Method of enabling two-state operation of electronic toll collection system 有权
标题翻译：实现电子收费系统两国运作的方法
公开(公告)号：US20070268140A1
公开(公告)日：2007-11-22
申请号：US11437236
申请日：2006-05-19
申请人： Wai-Cheung Tang , Thua Van Ho
发明人： Wai-Cheung Tang , Thua Van Ho
IPC分类号： G08B13/14 , H04Q5/22 , G08G1/065
CPC分类号： G06K19/0723 , G06K7/10346
摘要： A method and system for communicating state information from a transponder to a reader. The transponder outputs linearly polarized RF signals having either a first polarization, such as horizontal, or a second polarization, such as vertical. The polarization is selected so as to indicate a first state or a second state. The reader detects whether received RF signals have the first polarization or the second polarization, and thereby determines the state of the transponder. In some embodiments, the reader may include two linearly polarized antennas, one with the first polarization and one with the second polarization, for receiving the RF signals from the transponder and determining the polarization of the received RF signals. The system may be implemented within an electronic toll collection system, wherein the transponders are affixed to the interior of vehicle windshields using a rotatable mounting mechanism having two selectable positions.
摘要翻译：一种用于将状态信息从应答器传送到读取器的方法和系统。转发器输出具有诸如水平的第一极化或诸如垂直的第二极化的线性偏振RF信号。选择极化以指示第一状态或第二状态。读取器检测接收的RF信号是否具有第一极化或第二极化，从而确定应答器的状态。在一些实施例中，读取器可以包括两个线性极化天线，一个具有第一偏振的天线，另一个具有第二极化，用于从应答器接收RF信号并确定所接收的RF信号的极化。该系统可以在电子收费系统内实现，其中应答器使用具有两个可选位置的可旋转安装机构固定在车辆挡风玻璃的内部。

8. 发明授权

US07233260B2 Electronic toll collection system 有权
标题翻译：电子收费系统
公开(公告)号：US07233260B2
公开(公告)日：2007-06-19
申请号：US10959468
申请日：2004-10-05
申请人： Wai-Cheung Tang , Thua Van Ho
发明人： Wai-Cheung Tang , Thua Van Ho
IPC分类号： G08G1/00 , G08B13/14 , G07B15/00
CPC分类号： G07B15/063 , G08G1/017
摘要： An improved electronic toll collection system having two lane-based antennas per laneway. The antennas include an overhead antenna and a side mount antenna. The side mount antenna is disposed so as to communicate especially with license plate transponders. The two antennas are coupled to a transaction processing system for conducting toll transaction communications with a vehicle-mounted transponder through one of the two antennas.
摘要翻译：一种改进的电子收费系统，每个巷道具有两个基于车道的天线。天线包括架空天线和侧面安装天线。侧面安装天线布置成特别与牌照转发器进行通信。两个天线耦合到交易处理系统，用于通过两个天线中的一个与车载转发器进行长途交易通信。

9. 发明授权

US07479896B2 Adaptive channel bandwidth in an electronic toll collection system 有权
标题翻译：电子收费系统中的自适应信道带宽
公开(公告)号：US07479896B2
公开(公告)日：2009-01-20
申请号：US11534073
申请日：2006-09-21
申请人： Thua Van Ho , Daniel Terrier
发明人： Thua Van Ho , Daniel Terrier
IPC分类号： G08G1/00
CPC分类号： G07B15/063 , G07B15/06
摘要： A method and system for adaptively allocating bandwidth in an electronic toll collection system. The system includes a reader that adapts the scanning time allocated to specific antennas based upon the traffic conditions. Those antennas that process a higher volume of traffic receive a greater allocation of the scanning time. In some embodiments, the determination as to when to allocate additional time to an antenna may be based upon whether or not a transponder is currently in the coverage zone for the antenna.
摘要翻译：一种用于在电子收费系统中自适应地分配带宽的方法和系统。该系统包括基于交通状况来适应分配给特定天线的扫描时间的读取器。那些处理更高流量的天线可以获得更大的扫描时间分配。在一些实施例中，关于何时向天线分配附加时间的确定可以基于应答器是否当前在天线的覆盖区域中。

10. 发明授权

US6025799A Short range position locating system for transponder 失效
标题翻译：转发器短距离定位系统
公开(公告)号：US6025799A
公开(公告)日：2000-02-15
申请号：US40251
申请日：1998-03-06
申请人： Thua Van Ho , Robert Walter Tiernay
发明人： Thua Van Ho , Robert Walter Tiernay
IPC分类号： G01S13/87 , H01Q3/24 , H01Q3/40 , H01Q25/00 , H01Q3/02
CPC分类号： G01S13/878 , H01Q25/00 , H01Q3/24 , H01Q3/40
摘要： In order to locate a transponder in a roadway there are first and second antenna arrays at spaced locations. Each array is associated with a switching control which causes the array beam to step through a series of beams. The signal developed in each beam is converted to a digital result. The strongest beam from each array may be determined and the location of the transponder at the intersection of the two strongest beams.
摘要翻译：为了在道路中定位应答器，在间隔的位置处存在第一和第二天线阵列。每个阵列与切换控制相关联，这导致阵列光束穿过一系列光束。在每个光束中产生的信号被转换成数字结果。可以确定每个阵列中最强的波束，并确定应答器在两个最强波束的交点处的位置。

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