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WO2013019161A1 - Système doté d'un mécanisme anti-torsion pour un câble et son procédé - Google Patents

Système doté d'un mécanisme anti-torsion pour un câble et son procédé Download PDF

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Publication number
WO2013019161A1
WO2013019161A1 PCT/SG2012/000276 SG2012000276W WO2013019161A1 WO 2013019161 A1 WO2013019161 A1 WO 2013019161A1 SG 2012000276 W SG2012000276 W SG 2012000276W WO 2013019161 A1 WO2013019161 A1 WO 2013019161A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
movable member
cable
base
rotation
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.)
Ceased
Application number
PCT/SG2012/000276
Other languages
English (en)
Inventor
Wenjie Chen
Guilin Yang
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.)
Agency for Science Technology and Research Singapore
Original Assignee
Agency for Science Technology and Research Singapore
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 Agency for Science Technology and Research Singapore filed Critical Agency for Science Technology and Research Singapore
Publication of WO2013019161A1 publication Critical patent/WO2013019161A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01P1/067—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation the energy being transmitted in only one line located on the axis of rotation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines

Definitions

  • the invention broadly relates to a system with an anti-cable twisting mechanism and a method thereof, and in particular, an antenna system and a method of orientating an antenna for tracking a target such as a satellite.
  • cables e.g., RF (for radio frequency) cable
  • RF radio frequency
  • a rotary joint e.g., RF rotary joint
  • a rotary joint is known in the art and thus will not be described in detail herein.
  • employing a rotary joint may avoid such twisting of cables, it introduces other problems.
  • the use of a rotary joint introduces noise to the signals received for processing. This may be a significant problem when sensitive or weak signals are being measured by the antenna and transmitted to electronic components on the fixed structure for processing.
  • each rotary joint has a bandwidth limit which will restrict the transmission frequency of the antenna signal and has a limit to the number of channels it can accommodate.
  • rotary joints typically have a short lifespan due to constant wear through friction between rotating parts and are relatively costly to replace.
  • the present invention seeks to overcome, or at least ameliorate, one or more of the deficiencies of the prior art mentioned above.
  • a system comprising:
  • a movable member affixed with respect to the base, the movable member having a first axis
  • At least one cable is connectable to the movable member and the base such that a length of said cable exists therebetween
  • system is configured such that rotating the movable member about a second axis is accompanied with a corresponding rotation of the movable member about the first axis in an opposite direction so as to minimise twisting of said cable about its length when said cable is connected to the movable member and the base.
  • the system further comprises a rotatable member affixed to the base and extending along the second axis, wherein the movable member is coupled to the rotatable member such that the movable member is caused to rotate about the second axis when the rotatable member is rotated.
  • the system further comprises a mechanical assembly for coupling the movable member to the rotatable member for driving said corresponding rotation of the movable member about its first axis in the opposite direction when the rotatable member is rotated.
  • the mechanical assembly comprises a series of interlocking gears configured such that rotation of the rotatable member about the second axis is translated to proportional rotation of the movable member about the first axis in the opposite direction.
  • the series of interlocking gears are configured such that rotation of the rotatable member about the second axis is translated to equal rotation of the movable member about the first axis in the opposite direction.
  • the series of interlocking gears include bevel gears.
  • the system further comprises an actuator disposed on the movable member operable to generate a driving force for driving said corresponding rotation of the movable member about the first axis in the opposite direction.
  • the system further comprises a belt and pulley mechanism coupled to a shaft of the actuator and a shaft of the movable member such that the driving force generated by the actuator can be translated to the shaft of the movable member for rotating the movable member about the first axis.
  • a belt and pulley mechanism coupled to a shaft of the actuator and a shaft of the movable member such that the driving force generated by the actuator can be translated to the shaft of the movable member for rotating the movable member about the first axis.
  • the actuator has said cable connectable thereto for receiving a control signal for controlling the driving force generated by the actuator.
  • control signal is determined such that a degree of rotation of the movable member about the first axis is proportional to a degree of the rotation of the movable member about the second axis.
  • the degree of rotation of the movable member about the first axis is equal to the degree of the rotation of the movable member about the second axis.
  • the movable member is an antenna plate
  • the first axis is a boresight axis of the antenna plate
  • the second axis is an azimuth axis.
  • the system further comprises an actuator for driving the antenna plate in the azimuth direction.
  • the system further comprises an actuator for driving the antenna plate in an elevation direction.
  • the system further comprises a receiver disposed on the antenna plate for receiving a signal, wherein the receiver has said cable connectable thereto.
  • the system further comprises an electronic component disposed on the base for receiving and processing the signal from the receiver via said cable connectable thereo.
  • a method of orientating a movable member in a system for tracking a target comprising: a base; and a movable member affixed with respect to the base, the movable member having a first axis; wherein at least one cable is connectable to the movable member and the base such that a length of said cable exists therebetween, the method comprising:
  • Figure 1 depicts a schematic diagram broadly illustrating an exemplary system according to an embodiment of the present invention
  • Figure 2 depicts a schematic diagram illustrating an exemplary antenna system according to an embodiment of the present invention
  • Figure 3 depicts a simplified diagram illustrating the two degrees of freedom of the antenna system shown in Figure 2;
  • Figure 4 depicts a simplified diagram of the antenna system 200 shown in Figure 2 for illustrating a differential motion principle
  • Figure 5 depicts a schematic diagram of a top view of an antenna system according to an embodiment of the present invention
  • Figure 6 depicts a schematic diagram of a side view of an antenna system according to another embodiment of the present invention.
  • Figure 7 depicts a gear chain diagram illustrating the mechanical interactions between the bevel gears of the antenna system shown in Figure 6;
  • Figure 8 depicts a flow diagram of a method of orientating a movable member in a system for tracking a target according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram broadly illustrating an exemplary system 100 according to an embodiment of the present invention with an anti-cable twisting mechanism.
  • the system 100 comprises a base 102, and a movable member 104 having a first axis 106 and affixed (not shown) with respect to the base 102.
  • At least one cable 108 is connectable to the movable member 104 and the base 102 such that a length of the cable exists therebetween.
  • the cable 108 has one part 1 0 connected to the movable member 104 and another part 112 connected to the base 102.
  • the system 100 is configured such that rotating the movable member 104 about a second axis 114 is accompanied with a corresponding rotation of the movable member 104 about its first axis 106 in an opposite or reverse direction so as to substantially prevent, or at least minimise, twisting of the cable about its length.
  • the opposite or reverse direction which the movable member 104 is rotated about its first axis 106 is an anticlockwise direction (e.g., when looking into the first axis 106 from the left of Figure 1 ) and vice versa.
  • systems according to embodiments of the present invention are hereinafter described with cables 108 connected to the movable member 104 and the base 102.
  • cables 108 connected to the movable member 104 and the base 102.
  • the systems described hereinafter do not necessary need to have cables 108 already connected to the movable member 104 and the base 102. Instead, the systems may be manufactured and/or sold without such cables 108 and the cables 108 may be connected in the systems thereafter.
  • the cables 108 each has one part 110 connected to the movable member 104 and another part 112 connected to the base 102, the cables will begin twisting as the movable body 104 is rotated about the second axis 114 (e.g., an azimuth axis).
  • the second axis 114 e.g., an azimuth axis.
  • the cables 108 will continue to twist as denoted by arrow 118 and to such an extent that the cables 108 may ultimately fail.
  • the movable member 104 in order to substantially avoid, or at least minimise, such twisting of the cables 108, is configured to rotate or turn about its own axis 106 in an opposite or reverse direction (e.g., clockwise as denoted by arrow 120).
  • a rotation of the movable member 104 about its own axis 106 acts to release the twist of the cables 108 created by the rotation of the movable member 104 about the second axis 114.
  • two equal but reverse torsional forces on the cables 108 will result in the net torsion on the cables 108 being zero. Therefore, in contrast to the prior art, the cable twisting problem is minimised or substantially avoided without having to employ a rotary joint.
  • the first axis 106 is an axis generally perpendicular to a plane of the movable member 104. Alternatively, or in addition to, the first axis 106 is generally along a direction which the cables 108 generally extend from the movable member 104.
  • the first axis 106 is preferably a boresight axis 106 and the second axis 114 is an azimuth axis.
  • FIG. 2 illustrates a side view of an exemplary antenna system 200 according to an embodiment of the present invention.
  • the antenna system 200 comprises a base 202, a movable member 204 having a first axis 206 and affixed with respect to the base 202, and one or more cables 208 each having one part 210 connected to the movable member 204 (e.g., connected to electrical device(s) or components) 211 on the movable member 204) and another part 212 connected to the base 202 (e.g., connected to electrical device(s) or components) on the base 202) such that a length of cable exists therebetween.
  • the movable member 204 will be referred to as (but not limited to) an antenna plate
  • the first axis 206 will be referred to as (but not limited to) a boresight axis
  • the second axis 214 will be referred to as (but not limited to) an azimuth axis. Due to the orientation of the antenna plate 204 in Figure 2, the boresight axis 206 is shown to be coaxial with the azimuth axis 214.
  • the boresight axis 206 is not coaxial with the azimuth axis 214 (e.g., see Figure 3) since the boresight axis 206 is perpendicular to a plane of the antenna plate 204.
  • the antenna system 200 as shown in Figure 2 has an azimuth-elevation configuration. That is, the antenna plate 204 is rotatable about the azimuth axis 214 and the elevation axis 2 6 resulting in two degrees of freedom (DOFs). As illustrated in Figure 3, the antenna plate 204 is rotatable 360 degrees (i.e., unlimited rotation) about the azimuth axis 214 as denoted by arrow 215 and for example about 140 degrees about the elevation axis 216 as denoted by arrow 217. In other embodiments, depending on the requirements, the antenna plate 204 may be rotatable up to about 230 degrees so that the antenna plate 204 can have a tracking coverage of greater than a hemisphere.
  • DOFs degrees of freedom
  • the antenna system 200 comprises an actuator 220 (e.g., a motor such as a stepper motor) for driving the antenna plate 204 about the azimuth axis 206 (hereinafter referred to as an azimuth motor 220) and another actuator 222 (e.g., a motor such as a stepper motor) for driving the antenna plate 204 about the elevation axis 216 (hereinafter referred to as an elevation motor 222).
  • an actuator 220 e.g., a motor such as a stepper motor
  • another actuator 222 e.g., a motor such as a stepper motor
  • An exemplary mechanism for driving the antenna plate 204 about the azimuth axis 206 using the azimuth motor 220 and about the elevation axis 216 using the elevation motor 222 will now be described.
  • the antenna plate 204 is affixed with respect to the base 202.
  • the antenna system 200 includes a carrier shaft or a first rotary shaft 230 extending vertically along the azimuth axis 214.
  • the azimuth motor 220 is fixed on the base 202 and the carrier shaft 230 is affixed to (and rotatable with respect to) the base 202.
  • a bottom end 232 of the carrier shaft 230 is coupled with a shaft 234 of the azimuth motor 220 via a belt and pulley mechanism 236 thereby enabling the driving force of the azimuth motor 220 to be translated to the carrier shaft 230 for rotating the carrier shaft 230 about the azimuth axis 214.
  • a top end 238 of the carrier shaft 230 has a slot 240 for receiving a second rotary shaft or elevation shaft 242 therein such that the elevation shaft 242 extends along the elevation axis 248 and perpendicular to the carrier shaft 230 (i.e., azimuth axis 214).
  • An antenna plate bracket 244 is affixed to the elevation shaft 242 and provides an arm structure for projecting or extending the antenna plate 204 away from the top end 238 of the carrier shaft 230.
  • a third rotary shaft 248 is affixed to the base 202 and extends vertically along the azimuth axis 214 and coaxial with the carrier shaft 230.
  • a first bevel gear 246 fixed to a top end of the third rotary shaft 248 is arranged to interlock with a second bevel gear 250 fixed to an end of the elevation shaft 242 at right angle.
  • the elevation motor 222 is fixed on the base 202 of the antenna system 200 and a shaft 252 of the elevation motor 222 is coupled with a bottom end 254 of the third rotary shaft 248 via a belt and pulley mechanism 256.
  • the elevation shaft 242 will rotate about the elevation axis 216 through the second bevel gear 250 interacting with the first bevel gear 246.
  • the antenna plate 204 affixed to the elevation shaft 242 would also rotate about the elevation axis 216.
  • the carrier shaft 230 is hollow along its length for allowing cable(s) 208 to pass through from the base 202 to the antenna plate 204.
  • the third rotary shaft 248 is also hollow along its length thereby allowing the carrier shaft 230 to extend coaxially therein.
  • bearings 258 are provided between structures as illustrated in Figure 2 for allowing one structure to rotate relative to another structure.
  • FIG. 4 depicts a simplified diagram of the antenna system 200 shown in Figure 2 for illustrating the differential motion principle resulting in the two DOFs rotary motions of the antenna plate 204.
  • the elevation shaft 242 is capable of making a compound rotary motion that includes a rotation about the azimuth axis 214 and a rotation about the elevation axis 216.
  • the antenna system 200 may be an antenna mount installed on a mobile vehicle 218 (e.g., a boat 218 as shown in Figure 3). Therefore, as the mobile vehicle 218 moves and turns in different directions, the antenna system 200 will preferably need unlimited rotation about the azimuth axis 214 in order to continuous track a target such as a satellite.
  • a mobile vehicle 218 e.g., a boat 218 as shown in Figure 3. Therefore, as the mobile vehicle 218 moves and turns in different directions, the antenna system 200 will preferably need unlimited rotation about the azimuth axis 214 in order to continuous track a target such as a satellite.
  • the cable e.g., a RF cable
  • the cable 208 having one part 210 connected to an electrical device or component (e.g., a RF sensor) 21 1 on the antenna plate 204 and another part 212 connected to an electrical device or component 213 (e.g., RF signal processor) on the base 202, the cable 208 will begin twisting as the antenna plate 204 is rotated about the azimuth axis 214. Therefore, over a period of time, such twisting of the cable can build up to an extent that the cable 208 may ultimately fail.
  • an electrical device or component e.g., a RF sensor
  • an electrical device or component 213 e.g., RF signal processor
  • the antenna plate 204 is configured such that rotating the antenna plate 204 the azimuth axis 214 is accompanied with a corresponding rotation of the antenna plate 204 about its boresight axis 106 in an opposite or reverse direction.
  • Figure 5 depicts a schematic diagram of a top view of an antenna system 500 configured such that rotating the antenna plate 204 about the azimuth axis 214 is accompanied with a corresponding rotation of the antenna plate 204 about its boresight axis 206 in an opposite direction.
  • the main difference between the antenna system 500 shown in Figure 5 and the antenna system 200 shown in Figure 2 is the incorporation of an actuator 502 and related mechanisms or configurations for correspondingly rotating the antenna plate 204 about its boresight axis 206.
  • the actuator 502 will be referred to as (but not limited to) a motor 502.
  • the components of the antenna system 500 which are the same or equivalent to those of the antenna system 200 described hereinbefore will be denoted with the same reference numerals and detailed description will therefore be omitted for conciseness.
  • the motor 502 is disposed on the antenna plate 204 and coupled to a mechanism 504 for translating the driving force of the motor 502 to rotate the antenna plate 204 about its boresight axis 206.
  • the motor 502 is disposed on a front surface (i.e., outward facing surface) 506 of the antenna plate 204 and has a shaft 508 which extends through an opening 510 and beyond a back surface (i.e., inward facing surface) 512 of the antenna plate 204.
  • the opening 510 formed on the antenna plate 204 is offset with respect to the boresight axis 206 for allowing the motor shaft 508 to pass through.
  • the antenna plate 204 also has a hollow shaft 514 extending from the back surface 512 about the boresight axis 206. Therefore, by coupling the motor shaft 508 and the hollow shaft 514 of the antenna plate 204 with a belt and pulley mechanism 504, the antenna plate 204 can be rotated about its boresight axis 206 by the driving force of the motor 502.
  • a bearing mechanism 515 is coupled between the hollow shaft 514 of the antenna plate 512 and a hollow shaft 516 of the antenna plate bracket 244 for allowing the antenna plate 204 to be rotatable about its boresight axis 206.
  • the motor 502 is configured to receive a control signal for controlling the amount of driving force generated for driving the antenna plate 204 about its boresight axis 206.
  • a cable 208 is connected to the motor 502 for transmitting the control signal to control the motor 502 generated from an electrical component fixed on the base 202.
  • the antenna plate 204 has an opening 517 form therein preferably about the boresight axis 206 for allowing cables 208 connected to the base 202 to pass through to connect to any electrical device(s) or component(s) on the front surface 506 of the antenna plate 204.
  • the motor 502 is controlled to generate a driving force such that the degree of rotation of the antenna plate 204 about its boresight axis 206 is proportional to the degree of the rotation of the antenna plate 204 about the azimuth axis 214 but in an opposite direction.
  • the control signal for controlling the motor 502 is generated to be the proportional but opposite in polarity to a control signal for controlling the azimuth motor 220.
  • the degree of rotation of the antenna plate 204 about the boresight axis 206 is substantially equal to the degree of the rotation of the antenna plate 204 about the azimuth axis 214.
  • the control signal for controlling the motor 502 is generated to be the same but opposite in polarity to a control signal for controlling the azimuth motor 220.
  • the motor 502 can be a commercially available low cost motor. It is apparent to a person skilled in the art that various modifications can be made to the antenna system 500 while achieving the same technical result or effect and thus are within the scope of the present invention.
  • a sensor 518 capable of detecting an angular velocity of the antenna plate 204 in the azimuth direction can be disposed on the antenna plate 204. Therefore, the sensed signal containing angular velocity data in the azimuth direction can be used for controlling the motor 502 to drive the antenna plate 204 about its boresight axis 206 in the manner as hereinbefore described.
  • Figure 6 depicts a schematic diagram of a side view of an antenna system 600 illustrating another configuration according to an embodiment of the present invention for simultaneously rotating the antenna plate 204 about its boresight axis 206 in an opposite direction when the antenna plate 204 is rotated about the azimuth axis 214.
  • a mechanical assembly 601 is provided for coupling the antenna plate 204 and the carrier shaft 230 together such that rotating the antenna plate 204 about the azimuth axis 214 is accompanied with a corresponding rotation of the antenna plate 204 about its boresight axis 206 in an opposite direction so as to substantially prevent, or at least minimise, twisting of said one or more cables about its length.
  • the components of the antenna system 600 which are the same or equivalent to those of the antenna systems 200, 500 described hereinbefore will be denoted with the same reference numerals and detailed description will therefore be omitted for conciseness.
  • the mechanical assembly 601 comprises a series of interlocking gears configured such that rotation of the carrier shaft 230 about the azimuth axis 214 is translated to proportional rotation of the antenna plate 204 about its boresight axis 206 but in the opposite direction.
  • the degree of rotation of the antenna plate 204 about the boresight axis 206 is substantially equal to the degree of the rotation of the antenna plate 204 about the azimuth axis 214.
  • the mechanical assembly 601 comprises a first bevel gear 602, a second bevel gear 604, a third bevel gear 606 and a fourth bevel gear 608.
  • the first bevel gear 602 is stationary and rigidly fixed to the base 202 via a shaft 303 (i.e., non-rotatable).
  • the second bevel gear 604 and the third bevel gear 606 are fixed to a common shaft 605 therebetween such that they rotate together.
  • the common shaft 605 is arranged within the slot 240 of the carrier shaft 230 such that it extends along the elevation axis 216 and is perpendicular to the carrier shaft 230.
  • the common shaft 605 is hollow to allow the elevation shaft 242 to extend coaxially therein.
  • the fourth bevel gear 608 and the antenna plate 204 are fixed to a common shaft 610 therebetween such that they rotate together.
  • the second bevel gear 604 is engaged with the first bevel gear 602 at right angle and the third bevel gear 606 is engaged with the fourth bevel gear 608 at right angle in the manner as shown in Figure 6.
  • the fourth bevel gear 608 will also rotate thereby rotating the antenna plate 204 about its boresight axis.
  • the mechanical assembly 601 is capable of coupling the antenna plate 204 and the carrier shaft 230 such that rotating the antenna plate 204 about the azimuth axis 214 is accompanied with a corresponding rotation of the antenna plate 204 about its boresight axis 206 in an opposite direction.
  • twisting of the cables 208 can be advantageously minimised or substantially avoided without requiring a rotary joint. It is apparent to a person skilled in the art that various modifications can be made to the antenna system 600 while achieving the same technical result or effect and thus are within the scope of the present invention.
  • the number of teeth of the bevel gears is chosen to achieve a desired proportion of rotation of one bevel gear with respect to another bevel gear.
  • the first bevel gear 602 and the second bevel gear 604 have the same number of teeth and the third bevel gear 604 and the fourth bevel gear have the same number of teeth such that the antenna plate 204 will rotate by the same amount as the carrier shaft 230 (but in an opposite direction).
  • the number of teeth of the bevel gears can be adjusted to achieve different rotation proportion.
  • the method comprises a step 802 of rotating the movable member (e.g. the antenna plate) 204 about the second axis (e.g., the azimuth axis) 2 4 for tracking the target, and a step 804 of simultaneously rotating the movable member 204 about its first axis (e.g., the boresight axis) 206 in an opposite direction so as to minimise twisting of one or more cables 208 about its length.
  • embodiments of the present invention provide mechanisms / configurations that substantially avoid or at least minimise twisting of cable(s) 208 during continuous rotation of the antenna plate 204 about the azimuth axis 214 without relying on a costly rotary joint.
  • the azimuth motor 250 and the elevation motor 252 that drive angular motions of antenna plate 204 about the azimuth axis 214 and the elevation axis 216 are mounted on the base 202, thus providing a faster response in terms of the antenna's tracking capability.
  • Embodiments of the present invention advantageously provide low- cost, large tracking coverage and compact systems with an anti-cable twisting mechanism.
  • embodiments of the present invention advantageously enable low-cost manufacture without sacrificing the large tracking coverage required for mobile vehicle communication, such as in cars or ships.
  • the antenna system according to embodiments of the present invention provides an effective mechanism for preventing cables such as an RF cable from twisting under continuous tracking motion without requiring the use of an expensive rotary joint.
  • the antenna systems according to embodiments of the present invention are configured without a pole or discontinuity in the upper hemisphere, thereby avoiding limitations suffered by certain conventional 2-axis antenna systems.
  • the antenna systems according to embodiments of the present invention are structurally less complex, and therefore cheaper to manufacture.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

Cette invention concerne un système, comprenant une base et un élément mobile fixé par rapport à la base. Ledit élément mobile comprend un premier axe, au moins un câble pouvant être raccordé à l'élément mobile et à la base de telle façon qu'une longueur dudit câble s'étend entre ceux-ci. Ledit système est conçu de telle façon que la rotation de l'élément mobile autour d'un second axe est accompagnée d'une rotation correspondante de l'élément mobile autour du premier axe dans une direction opposée, de manière à minimiser la torsion dudit câble sur sa longueur quand ledit câble est raccordé à l'élément mobile et à la base. L'invention concerne en outre un procédé d'orientation d'un élément mobile dans un système destiné à poursuivre une cible.
PCT/SG2012/000276 2011-08-01 2012-07-31 Système doté d'un mécanisme anti-torsion pour un câble et son procédé Ceased WO2013019161A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG201105522-5 2011-08-01
SG201105522 2011-08-01

Publications (1)

Publication Number Publication Date
WO2013019161A1 true WO2013019161A1 (fr) 2013-02-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019078948A1 (fr) * 2017-10-19 2019-04-25 Raytheon Company Suspension à cardan au profil bas pour radar de bord
EP4307468A4 (fr) * 2021-03-09 2024-08-14 Mitsubishi Electric Corporation Mécanisme rotatif et dispositif d'antenne

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739337A (en) * 1985-09-09 1988-04-19 Mobile Satellite Corporation Mobile mechanically steerable satellite tracking antenna
US6188300B1 (en) * 1997-02-19 2001-02-13 Winegard Company Satellite dish antenna stabilizer platform
JP2003249808A (ja) * 2002-02-21 2003-09-05 Mitsubishi Electric Corp 衛星通信用アンテナ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739337A (en) * 1985-09-09 1988-04-19 Mobile Satellite Corporation Mobile mechanically steerable satellite tracking antenna
US6188300B1 (en) * 1997-02-19 2001-02-13 Winegard Company Satellite dish antenna stabilizer platform
JP2003249808A (ja) * 2002-02-21 2003-09-05 Mitsubishi Electric Corp 衛星通信用アンテナ装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019078948A1 (fr) * 2017-10-19 2019-04-25 Raytheon Company Suspension à cardan au profil bas pour radar de bord
US10290938B1 (en) 2017-10-19 2019-05-14 Raytheon Company Low profile gimbal for airborne radar
EP4307468A4 (fr) * 2021-03-09 2024-08-14 Mitsubishi Electric Corporation Mécanisme rotatif et dispositif d'antenne

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