Remote system for monitoring and controlling railroad wayside equipment
    2.
    发明授权
    Remote system for monitoring and controlling railroad wayside equipment 有权
    用于监控和控制铁路路边设备的远程系统

    公开(公告)号:US07140577B2

    公开(公告)日:2006-11-28

    申请号:US10820499

    申请日:2004-04-08

    IPC分类号: B61L7/00

    CPC分类号: B61L27/0005 B61L7/088

    摘要: A system for remote control of an electrically operated railroad wayside equipment having a power supply for powering the wayside equipment. a central controller provides central control signals. A transmitter associated with the controller receives the control signals and transmits communications signals corresponding to the control signals. A remote equipment controller controls operation of the wayside equipment in response thereto.

    摘要翻译: 一种用于远程控制电动铁路路边设备的系统,其具有用于向旁路设备供电的电源。 中央控制器提供中央控制信号。 与控制器相关联的发射器接收控制信号并发送与控制信号对应的通信信号。 远程设备控制器响应于此控制路边设备的操作。

    Methods and systems for neutral-to-ground communication
    3.
    发明授权
    Methods and systems for neutral-to-ground communication 有权
    中立地面通信的方法和系统

    公开(公告)号:US06856647B1

    公开(公告)日:2005-02-15

    申请号:US09690618

    申请日:2000-10-17

    IPC分类号: H04L25/02 H04B3/54 H04M7/02

    摘要: A method of distributing wide band data using a neutral-to-ground circuit within an electrical wiring installation includes modifying a load center with an interface module which interfaces to the neutral-to-ground circuit and configuring the interface module to compensate for varying impedance within the neutral-to-ground circuit to improve data transmission characteristics. Multiple embodiments are included within the method for compensation of varying impedance including channel sounding, spectral waterfilling, and communications using spread spectrum techniques, for example, frequency hopping and direct sequencing techniques.

    摘要翻译: 在电气布线安装中使用中性线对地电路分配宽带数据的方法包括:通过接口模块修改负载中心,所述接口模块与中性线对地电路相连接,并且配置接口模块以补偿接地模块内的变化的阻抗 中性点对地电路提高数据传输特性。 在用于补偿包括信道探测,频谱灌水和使用扩频技术的通信(例如跳频和直接测序技术)的变化阻抗的方法中包括多个实施例。

    Spatial synchronization for optical communication system
    5.
    发明授权
    Spatial synchronization for optical communication system 失效
    光通信系统的空间同步

    公开(公告)号:US5532860A

    公开(公告)日:1996-07-02

    申请号:US406437

    申请日:1995-03-20

    IPC分类号: G02B27/48 H04J14/00

    CPC分类号: H04J14/00 G02B27/48

    摘要: A spatial synchronization method for an optical communications system includes the step of transmitting from a transmit aperture a pyramidal synchronizing profile so as to sequentially spatially register a user identification speckle pattern at a receive aperture. The iterative patterns in the pyramidal synchronizing profile detected by the receive array are processed and correlated with a library of respective user pyramidal synchronizing profiles so as to match and register the speckle pattern for a particular user. Registration of the user speckle pattern provides an offset value representing the spatial relation of a reference point of the user's pattern to a corresponding reference point of the receive aperture, which offset information is applied to a receive pattern processor so that the receive aperture is aligned with the transmitted speckle patterns.

    摘要翻译: 用于光通信系统的空间同步方法包括从发射孔径发送锥体同步分布的步骤,以便在接收孔径处依次空间地登记用户识别散斑图案。 由接收阵列检测的金字塔形同步分布中的迭代模式被处理并与相应用户锥体同步分布的文库相关联,以便匹配并注册特定用户的散斑图案。 用户斑点图案的注册提供表示用户图案的参考点与接收孔径的相应参考点的空间关系的偏移值,该偏移信息被施加到接收图案处理器,使得接收孔径与 传输的斑点图案。

    Geometric harmonic modulation (GHM)-digital implementation
    6.
    发明授权
    Geometric harmonic modulation (GHM)-digital implementation 失效
    几何谐波调制(GHM)数字实现

    公开(公告)号:US5519692A

    公开(公告)日:1996-05-21

    申请号:US407554

    申请日:1995-03-20

    IPC分类号: H04B1/69 H04L27/26 H04K1/00

    CPC分类号: H04B1/69 H04L27/2601

    摘要: A set of phases defining an `address` and a `spreading key` is selected. These are employed in determining a preamble waveform and a traffic waveform. The preamble carrier waveform is a sum of a set of tones each offset by its phase, whereas the traffic carrier waveform is the product of these same offset tones. The tones have frequencies which are geometrically increasing multiples of a fundamental frequency. The phases and magnitudes of the preamble and traffic carrier waveforms are determined and prestored in a transmit and receive unit storage device. An inverse discrete Fourier Transform unit (IDFT) in the transmit unit receives the phase preamble offsets and magnitudes from the storage unit and creates a preamble carrier signal transmitted to the receive unit which determines if the phases match those which it is to listen to. If not, the following message is ignored; if they are, the following message is despread and decoded. IDFT creates a traffic carrier waveform from the traffic phases and magnitudes. Binary information is encoded in the carrier, processed and transmitted to the receive unit. A discrete Fourier Transform unit converts the received signal into phases and magnitudes. A dot product unit determines a dot product of the phase and magnitudes of the received signal and the traffic carrier waveform over a number of frequencies. A decision unit determines a binary message from the dot product.

    摘要翻译: 选择定义“地址”和“扩展密钥”的一组相位。 这些用于确定前导码波形和业务波形。 前导码载波波形是每个偏移其相位的一组音调的和,而业务载波波形是这些相同偏移音调的乘积。 音调具有几何上增加基频倍数的频率。 前导码和业务载波波形的相位和幅度被确定并预存储在发送和接收单元存储设备中。 发送单元中的离散傅里叶逆变换单元(IDFT)从存储单元接收相位前导偏移量和幅度,并产生发送到接收单元的前导码载波信号,该信号确定相位是否匹配要收听的相位。 如果没有,则忽略以下消息; 如果它们是,则以下消息被解扩和解码。 IDFT从交通阶段和幅度创建一个载波波形。 二进制信息被编码在载体中,被处理并发送到接收单元。 离散傅立叶变换单元将接收的信号转换为相位和幅度。 点积单位确定接收信号的相位和幅度以及多个频率上的业务载波波形的积积。 决策单元从点积确定二进制消息。

    Current sensor employing a mutually inductive current sensing scheme
    7.
    发明授权
    Current sensor employing a mutually inductive current sensing scheme 失效
    电流传感器采用互感电流检测方案

    公开(公告)号:US5453681A

    公开(公告)日:1995-09-26

    申请号:US85788

    申请日:1993-07-06

    IPC分类号: G01R1/20 G01R15/18

    CPC分类号: G01R1/203 G01R15/18

    摘要: An alternating current sensor employing a mutually-inductive current sensing scheme comprises a conductive pipe and a cylindrical-shaped conductive element at least partially surrounded by the pipe. The pipe is substantially concentric to the conductive element and a conductor electrically connects a pair of corresponding ends of the pipe and conductive element to form a connected conductive path through the sensor. The conductive element may include a passage or opening shaped to form a magnetic field within the passage during current flow along the conductive path.

    摘要翻译: 采用互感电流检测方案的交流传感器包括至少部分地被管道包围的导电管和圆柱形导电元件。 管道与导电元件基本上同心,并且导体电连接管和导电元件的一对相应的端部以形成通过传感器的连接的导电路径。 导电元件可以包括通道或开口,其形状以在沿着导电路径的电流期间在通道内形成磁场。

    Method and apparatus for encryption/authentication of data in energy
metering applications
    8.
    发明授权
    Method and apparatus for encryption/authentication of data in energy metering applications 失效
    能量计量应用中数据加密/认证的方法和装置

    公开(公告)号:US5239584A

    公开(公告)日:1993-08-24

    申请号:US813637

    申请日:1991-12-26

    IPC分类号: H04L9/06 H04L9/32

    摘要: In one embodiment, the present invention is an encryption/decryption and authentication algorithm. The algorithm has three major steps. The first step is generating cipher text. The second step is generating the authentication field. The third step is encrypting or deciphering the appropriate data in the message. One byte of cipher text is generated for every byte of plain text contained in the message. After all the cipher text is generated, a four byte authentication field is generated using the last four bytes of cipher text. The message is then scanned for data fields which have been encrypted or are to be encrypted and the corresponding byte of cipher text replaces the message bytes. The encryption is accomplished by sending the cipher text instead of message text. To decipher the message, the algorithm operates in a reverse mode to replace the cipher text with the message text, i.e., the algorithm is a self-reversing process.

    摘要翻译: 在一个实施例中,本发明是加密/解密和认证算法。 该算法有三个主要步骤。 第一步是生成密文。 第二步是生成认证字段。 第三步是加密或解密消息中的相应数据。 为消息中包含的纯文本的每个字节生成一个字节的密文。 生成所有密文后,使用最后四个密文字节生成四字节认证字段。 然后扫描已经加密或要加密的数据字段的消息,并且密文的相应字节替换消息字节。 加密是通过发送密文而不是消息文本来实现的。 为了解密消息,算法以反向模式操作以用消息文本替换密文,即算法是自反转过程。

    Safety system and device and methods of operating
    9.
    发明授权
    Safety system and device and methods of operating 有权
    安全系统及设备及操作方法

    公开(公告)号:US08935095B2

    公开(公告)日:2015-01-13

    申请号:US12560713

    申请日:2009-09-16

    CPC分类号: G01C21/20 G01C21/10 G01C23/00

    摘要: Various embodiments of a device, system and methods that promote safety and security within an organization. Sensor data from one or more installation sensors is collected, analyzed and used to create a map and/or directions that, when received by a wireless mobile device, facilitate a person's possible egress around or from a detected event. The information provided to the person by the map and/or the directions may be individually crafted to be of maximum use to the specific recipient so the person can understand, plan and execute the most appropriate danger avoidance maneuvers in minimal time.

    摘要翻译: 提高组织内安全性和安全性的设备,系统和方法的各种实施例。 来自一个或多个安装传感器的传感器数据被收集,分析和使用以创建当由无线移动设备接收到的方便一个人围绕或来自检测到的事件的可能出口的地图和/或方向。 通过地图和/或指示提供给人的信息可以单独制作为对特定接收者最大限度地使用,以便该人能够在最短时间内理解,规划和执行最合适的避免危险的机动。