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    • 4. 发明申请
    • DEVICE FOR DETECTING THE PRESENCE AND DIRECTION OF PASSAGE OF MOBILES AND PERSONS WITH THE VIEW TO COUNTING THEM
    • 检测手段和人员通过视图查看计算机的存在和方向的设备
    • WO1997022089A1
    • 1997-06-19
    • PCT/FR1995001473
    • 1995-12-14
    • BRIME S.A.LEBLANC, Michel
    • BRIME S.A.
    • G07C09/00
    • G06M11/00G06M1/101G07C9/00
    • The device of the invention provides for the detection of the presence and the direction of passage of mobiles, with a view to their counting, without requiring ground infrastructure. The device comprises two emitters of the infrared diode type (1 and 4). A mobile cutting the beam emitted by the first infrared emitter (1) reflects said beam. A signal is then received by the first reception element (3). The mobile continuing its displacement cuts the beam emitted by the second infrared emitter (4). A signal is then received by the second receiver element (2). The chronology of the signals received by the receiver elements enables to determine the direction of passage of the mobiles. An electronic embodiment provides for the control of emission elements (1 and 4) and the processing of the signals received by the receiver elements (2 and 3), with a view to counting the mobiles. The device of the invention is particularly intended to the counting of persons coming in and going out of transport means (underground, train, bus) or in a public or private place, to the counting of objects conveyed on a conveyor belt, as well as to the counting of vehicles.
    • 本发明的装置提供了移动台的存在和通过方向的检测,以便它们的计数,而不需要地面基础设施。 该装置包括红外二极管型(1和4)的两个发射极。 切割由第一红外发射器(1)发射的光束的移动体反射所述光束。 然后由第一接收元件(3)接收信号。 移动台继续其位移切割由第二红外发射器(4)发射的光束。 然后由第二接收器元件(2)接收信号。 由接收器元件接收的信号的时间顺序使得能够确定移动台的通过方向。 电子实施例提供对发射元件(1和4)的控制以及由接收器元件(2和3)接收的信号的处理,以计算移动台。 本发明的装置特别用于计数进出运输工具(地下,火车,公共汽车)或在公共场所或私人场所的人员对传送带上传送的物体的计数,以及 计算车辆。
    • 5. 发明专利
    • OPTICAL TIME DOMAIN REFLECTOMETER WITH INTERNAL REFERENCE REFLECTOR
    • CA2187132C
    • 2005-06-21
    • CA2187132
    • 1996-10-04
    • LEBLANC MICHELLAROSE ROBERTTREMBLAY ROBERT
    • LEBLANC MICHELLAROSE ROBERTTREMBLAY ROBERT
    • G01M11/00H04B10/071H04B10/08
    • An optical time domain reflectometer suitable for determining its front pane l insertion loss comprises a four-port coupler having first and second ports connected to a light source and an optical detector, respectively, and third and fourth ports connected to a front panel output connector and a reference reflector, respectively. In use, a fiber-under-tes t is connected to the front panel output connector. The coupler splits light from the light source between the front panel output connector and the reference reflector and couples light returni ng from the front panel output connector and roflector to the detector. The optical path between the front panel output connector and the coupler is longer than the optical path between the reference reflector and the coupler by such a distance that a Fresnel reflection pulse from the referenc e reflector, produced by a pulse emitted by the light source, will be received by the detector before a corresponding reflection pulse returned from the front panel output connector. In order to ensure that the two reflection pulses can be distinguished from each other, the difference betwe en the two optical paths is greater than a distance equal to an event dead zone for the particular width of pulse supplied by said light source. The reference reflector comprisesan end portion of a length of optical fiber, preferably encapsulated with a material having a refractive index different from that of the length of optical fiber. The OTDR facilitates miniaturization because it avoids the use of an interna l length of reference fiber,