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    Variable frequency train detection
    1.
    发明授权
    Variable frequency train detection 有权
    变频列车检测

    公开(公告)号：US08857769B1

    公开(公告)日：2014-10-14

    申请号：US13874059

    申请日：2013-04-30

    申请人： Siemens Industry, Inc.

    发明人： Brian Hogan

    IPC分类号： B61L23/34 ,  B61L1/02

    CPC分类号： B61L1/187 ,  B61L29/226

    摘要： A method and device capable of reliable and accurate train prediction determinations that account for, and overcome the problems associated with, changing ballast conditions. The method and device will detect the presence of a train in an approach area based on a rail characteristic measured in relation to a first measurement frequency transmitted along the rails. If there is a condition such as a ballast condition that may affect the rail characteristic, the method and device will detect the distance and speed of the train based on a rail characteristic measured in relation to a second measurement frequency transmitted along the rails. Otherwise, the distance and speed of the train will be determined based on the rail characteristic measured in relation to the first measurement frequency.

    摘要翻译： 一种方法和装置，其能够可靠和准确地训练预测确定，其解决和克服与改变压载条件相关的问题。 该方法和装置将基于相对于沿着轨道传输的第一测量频率测量的轨道特性，在接近区域中检测列车的存在。 如果存在可能影响轨道特性的镇流器状况的情况，则该方法和装置将基于相对于沿着轨道传输的第二测量频率测量的轨道特性来检测列车的距离和速度。 否则，将基于相对于第一测量频率测量的轨道特性来确定列车的距离和速度。

    Multi-frequency railroad grade crossing termination shunt assembly
    2.
    发明授权
    Multi-frequency railroad grade crossing termination shunt assembly 失效
    多频铁路横切终端分流总成

    公开(公告)号：US5029780A

    公开(公告)日：1991-07-09

    申请号：US522667

    申请日：1990-05-14

    申请人： Richard V. Peel

    发明人： Richard V. Peel

    IPC分类号： B61L29/22

    CPC分类号： B61L29/226

    摘要： A multi-frequency shunt is provided for use between the rails of a railroad track to define the approach distance for a railroad crossing using a constant warning time or motion detection device. The shunt includes a housing with a PC board having rail terminals thereon being mounted in the housing. There are connections from the rail terminals of the PC board, extending outwardly through the housing, to the rails. The PC board includes a plurality of inductive and capacitive elements mounted thereon and connected to header terminals which are mounted on a header board. There are straps for interconnecting the header terminals with the interconnections between the header terminals determining which inductive and capacitive elements are connected between the rails and thus determining the nominal frequency of the shunt. There is a removable cover on the housing which permits access to the header board and the header terminals to provide for changing the nominal frequency of the shunt to correspond to the output frequency of the grade crossing predictor.

    摘要翻译： 提供了一种多频分流器，用于在铁路轨道的轨道之间使用，以使用恒定警告时间或运动检测装置来定义铁路路口的接近距离。 分流器包括具有其上具有导轨端子的PC板的外壳，其安装在壳体中。 有从PC板的轨道端子的连接，通过外壳向外延伸到轨道。 PC板包括安装在其上的多个电感和电容元件，并连接到安装在接头板上的插头端子。 存在用于将标题终端互连到标题终端之间的互连的条带，确定哪些电感和电容元件连接在导轨之间，从而确定分路的额定频率。 外壳上有一个可拆卸的盖子，允许进入标题板和标题端子，以提供分流器的标称频率，以对应于等级交叉预测器的输出频率。