EP0019510B1 - Joint tournant multivoies pour équipement de détection électromagnétique - Google Patents

Joint tournant multivoies pour équipement de détection électromagnétique Download PDF

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Publication number
EP0019510B1
EP0019510B1 EP80400574A EP80400574A EP0019510B1 EP 0019510 B1 EP0019510 B1 EP 0019510B1 EP 80400574 A EP80400574 A EP 80400574A EP 80400574 A EP80400574 A EP 80400574A EP 0019510 B1 EP0019510 B1 EP 0019510B1
Authority
EP
European Patent Office
Prior art keywords
ring
transmission lines
input
conductor elements
movable
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.)
Expired
Application number
EP80400574A
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German (de)
English (en)
French (fr)
Other versions
EP0019510A1 (fr
Inventor
Henri Becavin
Alain Bailly
Philippe Lemerle
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.)
Thales SA
Original Assignee
Thomson CSF SA
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Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0019510A1 publication Critical patent/EP0019510A1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/06—Movable joints, e.g. rotating joints
    • H01P1/062—Movable joints, e.g. rotating joints the relative movement being a rotation
    • H01P1/066—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation
    • H01P1/068—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation the energy being transmitted in at least one ring-shaped transmission line located around the axis of rotation, e.g. "around the mast" rotary joint

Definitions

  • the present invention relates to a multi-channel rotary joint for electromagnetic detection equipment.
  • the electromagnetic detection equipment generally known by the name of Radar and which includes so-called secondary radars generally comprises an antenna which rotates in bearing and also sometimes in elevation.
  • a rotary joint which is placed in the feed path of the antenna.
  • the invention therefore relates to a rotary joint, that is to say in fact to a device intended to transmit high frequency energy between two circuits, in general without mechanical contact and in rotation with respect to one another. the other.
  • Rotary joints have been described in the literature and a relatively abundant description can be found in chapter 7 of volume 9 of the MIT (Massachussets Institute of Technology) collection "Microwave transmission circuits". However, these rotary joints are not very well suited to modern radar equipment where for conditions of good functioning it is necessary to have between the antenna and the receiver and transmitter, a relatively high number of distinct channels, number of the minimum order of 4 to 5.
  • a primary radar associated with a secondary radar whose antenna is mounted on the antenna of the primary radar where it is necessary to provide for the main or primary radar, a transmit channel, a sum receive channel and at least a difference reception channel and for the secondary radar, a interrogation channel, possibly a control channel for suppressing the secondary lobes, a sum response channel, a channel suppressing the secondary lobes and a difference channel for establishing the crevice.
  • Document FR-A-1,191,485 describes a rotary joint intended for transmitting several radioelectric signals corresponding to several channels between fixed cables and rotating elements.
  • This joint has a fixed structure and a mobile structure, cylindrical and coaxial.
  • the different channels are arranged one above the other in a so-called “stacking" arrangement.
  • each channel the energy transmission takes place by capacitive coupling between a continuous cylindrical input ring, integral with the fixed structure, and a continuous cylindrical output ring, integral with the movable structure and opposite the 'entry ring.
  • the circumference of the rings, along which the radioelectric energy propagates is necessarily large compared to the wavelength, for simple reasons of mechanical feasibility. It follows that the phase of the high frequency signal is not constant at all points of these rings and that, depending on the rotation of the mobile structure in front of the fixed structure, there will be variations in the amplitude and in the phase of the transmitted signals making such a device unsuitable for its use.
  • Document FR-A-1 202 276 partially improves the previous one as to the mentioned drawback of the phase shift of the signal along the coupling rings. It poses the problem of a "capacitive coupling ... which varies according to the relative positions of the bands during the rotational movement" (page 2, column 2, line 35 and following) and proposes a solution which consists, having as before, a cylindrical entry ring (strip 11) and a cylindrical exit ring (strip 12) facing it, dividing the conductive strips into several elements and connecting capacitors to each other. Two coupled strips are thus obtained made up of disjoint conductive elements.
  • the technical problem which the present invention seeks to solve is that of coupling between two rings, one fixed and the other mobile, without damaging the output signal by the harmful effect of the phase variations of the microwave wave. along these rings, and without, however, arriving at a system as complicated and bulky as that of the aforementioned document.
  • Figure 1 shows schematically in partial vertical section, a multi-way rotary joint according to the invention. This joint is limited by the entry guide 12 of the main track transmitting the signals from the main radar in the most probable case where this joint is used with a main radar-secondary radar system, and the exit guide 13.
  • the outlet guide 13 is movable around the axis of rotation 2, relative to the fixed inlet guide 12 and at 1, there is the main track of the joint.
  • the other tracks which are annular are located around the main track in horizontal planes.
  • the fixed guide 12 is fixed a metal body 14, having on its dimension parallel to the axis of rotation of the joint, a U-shape, one of the walls 14 of which has bosses 16 serving to support a dielectric layer 17 itself serving as a support for the fixed rings of the different tracks, rings marked with 18, 19, 20 and 180, 190, 200 for example if we consider 3 annular tracks in addition to the main track.
  • the wall 15 is moreover pierced with holes allowing passage to baluns 21, 22, 23.
  • a similar arrangement is made for the mobile part of the seal which comprises a metal body having two branches 24, 25 fixed to the mobile guide 13.
  • the wall 24 is pierced with holes allowing passage to baluns 26, 27, 28 for example and comprises bosses 29, 30 serving as support for a dielectric layer 31 itself serving as support for the movable rings 32, 33, 34 and 320, 330, 340. It can be seen that the dielectric layers 17 and 31 face each other.
  • Figure 2 shows in horizontal section, the seal according to the invention particularly showing how an annular track is formed.
  • Each annular track has two concentric rings and each ring is constituted by two concentric transmission lines in: broken regularly; the interruptions such as 35, 36, 350, 360, 39, 40 determine on each line, circular segments which are arranged in such a way that there is partial overlapping of the segments from one line to another, ensuring continuity electrical required.
  • the input ring thus comprises two transmission lines 18, 180 situated on either side of a dielectric layer 17.
  • the interruptions which are created in each of the lines are very clearly seen, such as 35, 36 on line 18 and 350, 360 on line 180. It is noted that the interruptions of the second line are found substantially opposite the middle of the sections of the first line.
  • the output ring movable relative to the input ring, also consists of two interrupted transmission lines 32, 320 arranged one relative to the other, on either side of a layer of dielectric 31, like the lines of the first ring.
  • the signals are transmitted between the two rings capacitively.
  • balun 21 associated with the line of transmission 18 and an output balun 26 associated with the transmission line 180.
  • the baluns are made necessary by the fact that the lines being normally closed on themselves, the phases at the points of attack 39-40 must be reversed to ensure continuity of currents on the lines.
  • FIG. 1 shows three annular paths, but it is easy to have from 5 to 6. Their realization, for example, is relatively easy.
  • the fixed parts and the mobile parts of the rings are advantageously produced according to the printed circuit technique.
  • the lines 18-180, 19-190 and 20-200 are deposited 7 on either side of a dielectric layer 17 fixed on the metal bosses 16 of the fixed body 14 of the joint. It is the same for lines 32-320, 33-330 and 34-340 fixed on either side of a dielectric strip 31 fixed on the metal bosses 29-30 of the movable body 12 of the joint.
  • the input and output baluns are also produced in printed circuits held by the metal walls 15 and 24 of the joint because they are connected through these walls, by rods 37, 38 to lines 18 and 32 respectively.
  • the thickness of the layers is substantially on the order of 1 to 2/10 mm, the air gaps on the order of 1 to 2 mm, the total height of a ring being substantially equal to 10 millimeters.
  • the length of the discontinuous strands of the lines is of the order of an eighth of the wavelength, a substantially optimal length.
  • the arrangement of the channels according to the invention comprises an adaptation system not described which is intended to compensate for the residual parasitic capacities.
  • the system exhibits good rotational stability, the residual variation of the amplitude being less than 0.1 dB and the residual variation of the phase being less than the degree.
  • a multi-way rotary joint has thus been described, having a relatively large number of annular tracks located one above the other around the main track of the joint, each track comprising a fixed ring and a movable ring, formed one and the other. Another, by two interrupted transmission lines, arranged in such a way that the signals are transmitted from one ring to the other by capacitive coupling.

Landscapes

  • Waveguide Connection Structure (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Manipulator (AREA)
  • Near-Field Transmission Systems (AREA)
EP80400574A 1979-05-11 1980-04-25 Joint tournant multivoies pour équipement de détection électromagnétique Expired EP0019510B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7911992 1979-05-11
FR7911992A FR2456398A1 (fr) 1979-05-11 1979-05-11 Joint tournant multivoies pour equipement de detection electromagnetique

Publications (2)

Publication Number Publication Date
EP0019510A1 EP0019510A1 (fr) 1980-11-26
EP0019510B1 true EP0019510B1 (fr) 1985-04-17

Family

ID=9225346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400574A Expired EP0019510B1 (fr) 1979-05-11 1980-04-25 Joint tournant multivoies pour équipement de détection électromagnétique

Country Status (5)

Country Link
US (1) US4327334A (enrdf_load_stackoverflow)
EP (1) EP0019510B1 (enrdf_load_stackoverflow)
JP (1) JPS55153401A (enrdf_load_stackoverflow)
DE (1) DE3070498D1 (enrdf_load_stackoverflow)
FR (1) FR2456398A1 (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2090074A (en) * 1980-12-16 1982-06-30 Idm Electronics Ltd Improvements in and relating to hf slip rings
US4543549A (en) * 1984-02-03 1985-09-24 United Technologies Corporation Multiple channel rotary joint
JPS61290678A (ja) * 1985-06-19 1986-12-20 ヒロセ電機株式会社 手動結線工具
US4949001A (en) * 1989-07-21 1990-08-14 Campbell Steven R Partial discharge detection method and apparatus
US5475312A (en) * 1994-06-07 1995-12-12 Iris Power Engineering Inc. Method and device for distinguishing between partial discharge and electrical noise
EP0707388B1 (en) * 1994-10-12 2005-12-07 Dai Nippon Printing Co., Ltd. Signal transmission device using a fixed and a rotatable body
US5668514A (en) * 1994-10-12 1997-09-16 Dai Nippon Printing Co., Ltd. Signal transmission device
JPH10124785A (ja) * 1996-10-15 1998-05-15 Dainippon Printing Co Ltd 信号伝送装置
JPH10124786A (ja) * 1996-10-15 1998-05-15 Dainippon Printing Co Ltd 信号伝送装置
GB2368470B (en) * 2000-05-10 2004-02-18 Transense Technologies Plc An improved rotary signal coupler
US7623002B2 (en) * 2008-01-30 2009-11-24 The United States Of America As Represented By The Secretary Of The Navy Method for coupling a direct current power source across a nearly frictionless high-speed rotation boundary
DE102011050588A1 (de) * 2011-05-24 2012-11-29 Krauss-Maffei Wegmann Gmbh & Co. Kg Drehkupplung zur berührungsfreien Übertragung eines elektrischen Signals und Fahrzeug
CN106384862A (zh) * 2016-12-02 2017-02-08 中国船舶重工集团公司第七二四研究所 一种l波段非接触式小轴向尺寸旋转铰链及其实现方法
US11736145B2 (en) 2019-05-28 2023-08-22 Moog Inc. Graduated frequency response non-contacting slip ring probe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123782A (en) * 1964-03-03 Around the mast rotary coupling having shielded stator
DE1066638B (enrdf_load_stackoverflow) * 1957-03-18
FR1191485A (fr) * 1958-02-13 1959-10-20 Applic Rech Electronique Joint tournant radioélectrique
US3104362A (en) * 1959-08-27 1963-09-17 Thompson Ramo Wooldridge Inc Microwave filter
DE1269691B (de) * 1965-08-09 1968-06-06 Siemens Ag Drehkupplung fuer die UEbertragung hochfrequenter Wellenenergie
US3605045A (en) * 1969-01-15 1971-09-14 Us Navy Wide-band strip line frequency-selective circuit
US4233580A (en) * 1976-11-23 1980-11-11 Spinner Gmbh Rotating coupler for transmitting high frequency energy

Also Published As

Publication number Publication date
DE3070498D1 (en) 1985-05-23
JPS6153881B2 (enrdf_load_stackoverflow) 1986-11-19
JPS55153401A (en) 1980-11-29
US4327334A (en) 1982-04-27
FR2456398A1 (fr) 1980-12-05
FR2456398B1 (enrdf_load_stackoverflow) 1983-04-15
EP0019510A1 (fr) 1980-11-26

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