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EP3382796A1 - Antenne à micro-ondes - Google Patents

Antenne à micro-ondes Download PDF

Info

Publication number
EP3382796A1
EP3382796A1 EP17163987.5A EP17163987A EP3382796A1 EP 3382796 A1 EP3382796 A1 EP 3382796A1 EP 17163987 A EP17163987 A EP 17163987A EP 3382796 A1 EP3382796 A1 EP 3382796A1
Authority
EP
European Patent Office
Prior art keywords
pivot bar
reflector element
microwave antenna
threaded fasteners
waveguide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17163987.5A
Other languages
German (de)
English (en)
Other versions
EP3382796B1 (fr
Inventor
Lorenzo Bossio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ECM SpA
Original Assignee
Progress Rail Inspection and Information Systems SRL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Progress Rail Inspection and Information Systems SRL filed Critical Progress Rail Inspection and Information Systems SRL
Priority to ES17163987T priority Critical patent/ES2846890T3/es
Priority to EP17163987.5A priority patent/EP3382796B1/fr
Publication of EP3382796A1 publication Critical patent/EP3382796A1/fr
Application granted granted Critical
Publication of EP3382796B1 publication Critical patent/EP3382796B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
    • H01Q1/1228—Supports; Mounting means for fastening a rigid aerial element on a boom
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems

Definitions

  • the present disclosure relates to a microwave antenna, and in particular relates to a microwave antenna for detecting obstacles in a railway.
  • Modem railways use systems to detect obstacles in the railway, for instance at a railway crossing where the railway intersects a road.
  • One such detection system involves a radar system oriented to detect objects in the railway.
  • the orientation of the radar system's antenna must be accurate to ensure the targeting zone of the radar covers the area of interest. It is not uncommon for the radar system to have a working range of 50 m to ensure adequate coverage of a railway crossing. A change in the antenna orientation of 1 degree will result in an approximately 1 m change in the targeting zone at 50 m, which can be sufficient for the radar to miss an obstacle. For instance, if the 1 degree change is in the inclination axis, the targeting zone may move above or below an obstacle.
  • a microwave antenna for detecting obstacles in a railway.
  • the microwave antenna comprises a radar transceiver, a waveguide attached to the radar transceiver, and a reflector element.
  • a pivot bar is fastened to the waveguide and the reflector element, the pivot bar being configured to stabilize and fasten together the waveguide and the reflector element in accordance with predetermined relative positions and angles thereof.
  • the pivot bar is mounted via a plurality of threaded fasteners that adjust the orientation of the pivot bar and the reflector element.
  • FIG. 1 illustrates a microwave antenna 100 for detecting obstacles in a railway according to an embodiment of the disclosure.
  • the microwave antenna 100 comprises a radar transceiver 102, a waveguide 104 and a reflector element 106.
  • One end 108 of the waveguide 104 is fastened to the radar transceiver 102.
  • the waveguide 104 has a neck 110, at a base 112 of which there may be provided a flange 114, as seen in FIG. 2 .
  • the reflector element 106 may be fastened to the flange 114 using fasteners 116.
  • the microwave antenna 100 further comprises a pivot bar 120 that is fastened to the waveguide 104 and the reflector element 106.
  • the pivot bar 120 may be fastened to the flange 114 of the waveguide 104.
  • First and second arms 122, 124 may be provided spaced apart from each other and configured to receive opposite ends of the pivot bar 120 in an opening 126 formed in each arm 122, 124.
  • the pivot bar 120 may be mounted to the arms 122, 124 via a plurality of threaded fasteners 128. In other embodiment, the pivot bar 120 may be mounted via the threaded fasteners 128 in other arrangements. For instance, the pivot bar 120 may be mounted to only one of the arms 122, 124 via the threaded fasteners 128.
  • the pivot bar 120 acts to stabilize and fasten together the waveguide 104 and the reflector element 106 in accordance with predetermined relative positions and angles thereof.
  • the base 112 of the waveguide 104 rests on the pivot bar, providing further stability.
  • the pivot bar 120 is mounted to each arm 122, 124 via four threaded fasteners 128 arranged in two pairs, one of which extends generally horizontally and the other of which extends generally vertically as shown in FIG. 3 .
  • Each pair of threaded fasteners 128 is provided in an opposed configuration, one to each side of the opening 126, and engage threaded holes (not shown) formed in each arm 122, 124 such that the threaded fasteners 128 extend into the opening 126.
  • the pivot bar 120 is held between the threaded fasteners 128.
  • the pairs of threaded fasteners 128 may be spaced slightly apart from each other along the pivot bar 120.
  • the threaded fasteners 128 permit adjustment of the orientation of the pivot bar 120 and the reflector element 106 fastened thereto, which in turn adjusts a targeting zone of a radar system incorporating the microwave antenna 100.
  • the pairs of threaded fasteners 128 may be arranged in two axes such that orientation of the pivot bar 120 and the reflector element 106 may be adjusted in two axes.
  • the threaded fasteners 128 are configured to adjust the azimuthal and inclination orientations of the pivot bar 120 and reflector element 106.
  • the threaded fasteners 128 may comprise fine adjustment screws having at least 100 threads-per-inch to allow fine adjustment of the orientation of the pivot bar 120 and the reflector element 106. In addition to providing fine adjustment of the pivot bar 120's orientation, the opposed configuration of the threaded fasteners 128 also provides a secure mounting for the pivot bar 120.
  • the microwave antenna 100 may further comprising a frame 130 to which the first and second arms 122, 124 are fastened.
  • the radar transceiver 102 may also be fastened to the frame 130 using fasteners 132.
  • the fasteners 132 may be loosened prior to adjusting the orientation of the pivot bar 120 and the reflector element 106 using the threaded fasteners 128. Since the waveguide 104 is fastened to the pivot bar 120 and the radar transceiver 102 is fastened to the waveguide 104, adjusting the orientation of the pivot bar 120 also results in movement of the radar transceiver 102 relative to the frame 130. Loosening the fasteners 132 permits movement of the radar transceiver 102 relative to the frame 130 without inducing stress on the components. One adjustment of the pivot bar 120 is completed, the fasteners 132 may be refastened to secure the radar transceiver 102 to the frame and help hold the adjusted orientation of the pivot bar 120 and reflector element 106.
  • the frame 130 has mounting flanges 134 provided on each side of the frame 130. Each mounting flange 134 has holes 136 formed therein that may be used to mount the microwave antenna 100 in use.
  • the threaded fasteners 128 permit adjustment of the orientation of the pivot bar 120 and reflector element 106 relative to the frame 130.
  • the frame 130 may have a portion of microwave absorber 138 attached thereto.
  • the microwave absorber 138 is provided adjacent to the reflector element 106.
  • Embodiments of the disclosure provide a microwave antenna 100 for detecting obstacles in a railway, in which orientation of the microwave antenna 100 may be adjusted with fine precision and in a simple and convenient manner. Such a microwave antenna 100 may reduce installation time during replacement or servicing of microwave antennas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Support Of Aerials (AREA)
EP17163987.5A 2017-03-30 2017-03-30 Antenne à micro-ondes Active EP3382796B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES17163987T ES2846890T3 (es) 2017-03-30 2017-03-30 Antena de microondas
EP17163987.5A EP3382796B1 (fr) 2017-03-30 2017-03-30 Antenne à micro-ondes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17163987.5A EP3382796B1 (fr) 2017-03-30 2017-03-30 Antenne à micro-ondes

Publications (2)

Publication Number Publication Date
EP3382796A1 true EP3382796A1 (fr) 2018-10-03
EP3382796B1 EP3382796B1 (fr) 2020-11-18

Family

ID=58464327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17163987.5A Active EP3382796B1 (fr) 2017-03-30 2017-03-30 Antenne à micro-ondes

Country Status (2)

Country Link
EP (1) EP3382796B1 (fr)
ES (1) ES2846890T3 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870062A (en) * 1996-06-27 1999-02-09 Andrew Corporation Microwave antenna feed structure
US20110156948A1 (en) * 2007-03-16 2011-06-30 Mobile Sat Ltd. Vehicle mounted antenna and methods for transmitting and/or receiving signals
US20150054703A1 (en) * 2012-04-02 2015-02-26 Furuno Electric Co., Ltd. Antenna device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5870062A (en) * 1996-06-27 1999-02-09 Andrew Corporation Microwave antenna feed structure
US20110156948A1 (en) * 2007-03-16 2011-06-30 Mobile Sat Ltd. Vehicle mounted antenna and methods for transmitting and/or receiving signals
US20150054703A1 (en) * 2012-04-02 2015-02-26 Furuno Electric Co., Ltd. Antenna device

Also Published As

Publication number Publication date
EP3382796B1 (fr) 2020-11-18
ES2846890T3 (es) 2021-07-30

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