WO2020213136A1 - アンテナ装置及び宇宙航行体 - Google Patents
アンテナ装置及び宇宙航行体 Download PDFInfo
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- WO2020213136A1 WO2020213136A1 PCT/JP2019/016674 JP2019016674W WO2020213136A1 WO 2020213136 A1 WO2020213136 A1 WO 2020213136A1 JP 2019016674 W JP2019016674 W JP 2019016674W WO 2020213136 A1 WO2020213136 A1 WO 2020213136A1
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- Prior art keywords
- reflector
- sub
- antenna device
- ribs
- support rod
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/18—Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector
- H01Q15/20—Collapsible reflectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
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- 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
- H01Q1/1235—Collapsible supports; Means for erecting a rigid antenna
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- 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
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
Definitions
- the present disclosure relates to an antenna device including a radiator, a main reflector and a sub-reflector, and a space navigation object.
- Patent Document 1 An antenna device that radiates radio waves toward is known (Patent Document 1).
- the main reflector which has a larger shape than the sub-reflector, is compactly stored when it is moving or not in use, as represented by the reflector for portable antennas and satellite-mounted antennas, and is deployed and communicated when it is in use.
- Patent Document 2 describes that a deployable antenna that supports a cable network that functions as an antenna reflecting surface with a deployable truss can accommodate and deploy the deployable truss by using a slide hinge.
- Patent Document 2 requires an expansion tube and a gas supply device when it is deployed from its storage.
- the present disclosure provides an antenna device and a space navigation body that can be more easily deployed from a stored state by various embodiments.
- a plurality of ribs that are expandably formed from a folded storage state and an external radio wave that is erected between each of the plurality of ribs and radiated from a radiator is reflected.
- the regulation is released by the operation of the main reflector including the planar body configured to be radiable and the plurality of ribs in the retracted state, and the regulation release member different from the main reflector.
- An antenna device including, and a regulatory member configured to be provided.
- a space navigation body including the above-mentioned entena device is provided.
- an antenna device and a space navigation body that can be more easily deployed from a stored state.
- FIG. 1 is a diagram showing a configuration of a space navigation body 1 according to the first embodiment of the present disclosure.
- FIG. 2 is a block diagram showing the configuration of the space navigation body 1 according to the first embodiment of the present disclosure.
- FIG. 3A is a diagram showing a configuration when the reflector 120 of the space navigation body 1 according to the first embodiment of the present disclosure is deployed.
- FIG. 3B is a diagram showing a configuration when the reflector 120 of the space navigation body 1 according to the first embodiment of the present disclosure is stored.
- FIG. 4 is a diagram showing a cross-sectional configuration of the sub-reflector 122 and the main body 300 when the reflector 120 of the space navigation body 1 according to the first embodiment of the present disclosure is housed.
- FIG. 1 is a diagram showing a configuration of a space navigation body 1 according to the first embodiment of the present disclosure.
- FIG. 2 is a block diagram showing the configuration of the space navigation body 1 according to the first embodiment of the present disclosure.
- FIG. 3A is a
- FIG. 5 is a diagram showing a configuration of a transmission device 150 according to the first embodiment of the present disclosure.
- FIG. 6A is a diagram conceptually showing the operation of the delivery device 150 according to the first embodiment of the present disclosure.
- FIG. 6B is a diagram conceptually showing the operation of the delivery device 150 according to the first embodiment of the present disclosure.
- FIG. 6C is a diagram conceptually showing the operation of the delivery device 150 according to the first embodiment of the present disclosure.
- FIG. 7 is a diagram conceptually showing the arrangement position of the sub-reflector 122 according to the first embodiment of the present disclosure.
- FIG. 8A is a diagram showing a mounting structure of the rib 141 and the hub 143 according to the first embodiment of the present disclosure.
- FIG. 8B is a diagram showing a folded structure of the rib 141 according to the first embodiment of the present disclosure.
- FIG. 9 is a diagram showing a folding structure of the rib 141 according to the first embodiment of the present disclosure.
- FIG. 10 is a diagram showing the structure of the regulatory member 182 according to the first embodiment of the present disclosure.
- FIG. 11A is a diagram conceptually showing a regulated state of the rib 141 according to the first embodiment of the present disclosure.
- FIG. 11B is a diagram conceptually showing the regulated state of the rib 141 according to the first embodiment of the present disclosure.
- FIG. 12 is a diagram showing a processing sequence of each device performed by the space navigation body 1 according to the first embodiment of the present disclosure.
- FIG. 13 is a diagram conceptually showing the operation of the delivery device 250 according to the second embodiment of the present disclosure.
- FIG. 14A is a diagram conceptually showing the regulated state of the rib 141 according to the third embodiment of the present disclosure.
- FIG. 14B is a diagram conceptually showing the regulated state of the rib 141 according to the third embodiment of the present disclosure.
- the configuration diagram 1 of the space navigation body 1 is a diagram showing the configuration of the space navigation body 1 according to the first embodiment of the present disclosure.
- the space navigation body 1 includes a main body 300 equipped with a control unit that controls the navigation of the space navigation body 1 itself and controls the operation and posture of the space navigation body 1 in outer space, and in outer space.
- the power supply unit 200 that supplies power for driving various components including the main body 300 and the radiator 110, and the space navigation body 1 and the ground or other space navigation bodies.
- FIG. 2 is a block diagram showing the configuration of the space navigation body 1 according to the first embodiment of the present disclosure.
- the space navigation body 1 does not have to include all of the components shown in FIG. 2, and it is possible to omit a part of the components or add other components.
- the space navigation body 1 can be equipped with a plurality of power supply units 200 and / or a plurality of communication units 100.
- the space navigation body 1 controls communication with a main body 300 including a computer 301 including a memory 310 and a processor 320 and a sensor 330, a power supply unit 200 including a power supply control circuit 210, a battery 220, and a solar panel 230. It includes a circuit 170, a transmitter 171, a receiver 172, a radiator 110, and a communication unit 100 including a reflector 120. Each of these components is electrically connected to each other via a control line and a data line.
- the main body 300 is equipped with various components / parts for controlling the flight, communication, etc. of the space navigation body 1 including the computer 301 and various sensors.
- the computer 301 functions as a control unit for controlling other components / components
- an on-board computer is used as an example.
- the onboard computer is equipped with a memory 310 and a processor 320.
- the on-board computer is an example of the computer 301, and may be any computer as long as it can control other components / components such as a processor and a microcomputer.
- the memory 310 is composed of RAM, ROM, non-volatile memory, HDD, etc., and functions as a storage unit.
- the memory 310 stores instruction commands for various controls of the space navigation body 1 according to the present embodiment as a program.
- the memory 310 received an image of the outside of the space navigation body 1 captured by a camera (not shown), an observed value obtained by using the communication unit 100 as a radar, and received from a ground station via the communication unit 100.
- Information or information transmitted to the ground station via the communication unit 100, detection information such as a sensor 330 required for controlling the attitude and progress of the space navigation body 1, a program for deploying the reflector 120 of the communication unit 100, etc. Is stored as appropriate.
- the processor 320 functions as a control unit that controls the space navigation body 1 based on the program stored in the memory 310. Specifically, the power supply unit 200, the communication unit 100, the sensor 330, and the like are controlled based on the program stored in the memory 310. As an example, the generation of information for transmission to a ground station or another space navigation body via the communication unit 100, the control related to the observation performed using the communication unit 100 as a radar, and the reflector 120 of the communication unit 100 are used. Control to deploy.
- the sensor 330 is a temperature sensor for observing the external environment of the space navigation body 1, such as a gyro sensor, an acceleration sensor, a position sensor, a speed sensor, and a stellar sensor, which are necessary for controlling the progress and attitude of the space navigation body 1.
- a gyro sensor for observing the external environment of the space navigation body 1
- An illuminance sensor, an infrared sensor and the like, a temperature sensor for measuring the internal environment of the space navigation body 1, an illuminance sensor and the like may be included.
- the detected information / data is appropriately stored in the memory 310, used for control by the processor 320, or transmitted to a base on the ground via the communication unit 100.
- the power supply unit 200 includes a power supply control circuit 210, a battery 220, and a solar panel 230, and functions as a power supply unit.
- the power supply control circuit 210 is connected to the battery 220 and controls charging / discharging of electric power from the battery 220.
- the battery 220 is controlled by the power supply control circuit 210 to charge the electric power generated by the solar panel 230, and also supplies the electric power to be supplied to each drive system such as the computer 301 and the communication unit 100 in the main body 300. accumulate.
- the communication unit 100 includes a communication control circuit 170, a transmitter 171, a receiver 172, a radiator 110, and a reflector 120, and functions as a communication unit.
- the communication control circuit 170 performs processing such as modulation and demodulation in order to transmit and receive information to the ground station and other space navigation bodies via the connected radiator 110.
- the modulated signal is converted into a high-frequency radio frequency by the transmitter 171 and then amplified and radiated to the reflecting surface of the reflector 120 via the radiator 110.
- the high frequency signal radiated from the radiator 110 is once reflected by the sub-reflector 131 of the sub-reflector 122, and then radiated to the outside by the main reflector of the main reflector 121.
- the high frequency signal received from the outside is received by the receiver 172 through the reverse path and demodulated by the communication control circuit 170.
- the reflector 120 is compactly stored when it is moved or unused, but is deployed when it is used.
- the communication unit 100 has a frequency band of 8 GHz or less, a communication frequency of 8 to 12 GHz band (so-called X band band), a communication frequency of 12 GHz to 18 GHz band (so-called Ku band band), and a communication frequency of millimeter wave band of 30 GHz or more. It is possible to adjust the communication frequency in the submillimeter wave band of 300 GHz or more as desired.
- the communication unit 100 can be used as a radar for observation of weather, rainfall, military use, etc., and as a communication antenna for communication with a ground station or another space navigation body, regardless of its use. Absent.
- FIG. 3A is a diagram showing a configuration when the reflector 120 of the space navigation body 1 according to the first embodiment of the present disclosure is deployed.
- the space navigation body 1 has an antenna device 10 including at least a reflector 120 including a main reflector 121 and a sub-reflector 122, a radiator 110, and a transmitting device 150.
- the antenna device 10 is arranged so as to face the radiator 110 at a predetermined angle with respect to the radiator 110, and the radio wave radiated from the radiator 110 is sent to the main reflector of the main reflector 121.
- a sub-reflector 122 for reflection and a main reflector 121 which is arranged so as to face the sub-reflector 131 of the sub-reflector 122 and further reflects the radio wave reflected by the sub-reflector 131 and radiates the radio wave to the outside. It includes a main reflector, a support rod 132 for supporting the sub-reflector 131, and a delivery device 150 for delivering the sub-reflector 131 as the main reflector is deployed.
- the antenna device 10 is installed in the space navigation body 1 by fixing the hub 143 to the pedestal 315 of the space navigation body 1.
- the main reflector constituting the main reflector 121 includes a plurality of ribs 141, a planar body 148, and the like.
- the reflecting surface of the main reflector 121 is formed in a parabola (parabolic) shape in order to function as the main reflecting mirror as described above.
- the hub 143 is provided on the antenna axis X (also referred to as the central axis X of the hub 143) at the center of the antenna device 10.
- the hub 143 is formed in a columnar shape by a dielectric material such as plastic or a metal such as titanium or stainless steel.
- the hub 143 is provided with rib mounting portions 146 on the outer peripheral surface thereof, and a plurality of ribs 141 are radially arranged at predetermined intervals.
- the hub 143 is formed to have a substantially circular cross section as a whole.
- the cross-sectional shape is not limited to a circular shape, and may be an elliptical shape or a polygonal shape.
- the rib 141 includes a plurality of ribs 141-1 to 141-n.
- the ribs 141 are radially arranged on the outer periphery of the hub 143 at predetermined intervals about the hub 143.
- the upper surface of each rib 141 on the side that becomes the reflecting mirror surface is formed in a parabola shape.
- the planar body 148 is erected on the upper surface formed in a parabola shape.
- the rib 141 is, for example, a spring material formed of a composite material such as stainless spring steel, GFRP (Glass Fiber Reinforced Plastics), CFRP (Carbon Fiber Reinforced Plastics), and has elasticity.
- the rib 141 is composed of a total of 24 ribs.
- the number of ribs 141 can be changed regardless of whether the number is even or odd, depending on the area of the deployed antenna when it is deployed, the material and strength of the ribs used, and the like.
- the ribs 141 are arranged at predetermined intervals, but the intervals may be fixed in all the ribs 141, or only a part of the ribs may be closely spaced. It may be regular.
- the rib 141 has elasticity so that it can be unfolded from the folded stored state.
- the present invention is not limited to this, and a plurality of ribs may be combined by a hinge or the like, folded by the hinge at the time of storage, and deployed by driving a motor or the like at the time of deployment. Further, the rib 141 may be stored and deployed by combining an elastic material and a hinge.
- the planar body 148 forming the main reflector together with the ribs 141 is erected between a pair of ribs 141 adjacent to each other.
- the planar body 148 is formed of a material capable of reflecting radio waves so as to have a parabola shape as a whole.
- the planar body 148 is formed of a metal mesh (metal mesh) formed of molybdenum, gold, or a combination thereof.
- the planar body 148 prepares substantially triangular metal meshes according to the number of ribs 141, sutures each metal mesh, and is erected on the upper surface formed in the parabola shape of the ribs 141.
- the planar body 148 does not have so much tension in the direction toward the central axis X of the hub 143, but is constant in the direction perpendicular to the direction. Has tension. Therefore, when the ribs 141 are expanded and the main reflector of the main reflector 121 is in a completely open state, the adjacent ribs 141 are pulled by the tension of the ribs 141 to maintain the distance between the adjacent ribs 141. It becomes possible to do.
- one planar body 148 is erected between a pair of ribs 141 adjacent to each other.
- one planar body 148 does not necessarily have to be erected between the pair of ribs 141, and may be erected over three or more consecutive ribs 141.
- the planar body 148 may be provided with a predetermined crease in advance in order to further ensure the reproducibility of the folded shape.
- the sub-reflector 122 includes a sub-reflector 131 arranged so as to face the main reflector of the main reflector 121, and a support rod 132 for arranging the sub-reflector 131 at a predetermined distance from the radiator 110.
- the sub-reflector 131 is made of a material capable of reflecting radio waves and has a quadric curved surface shape as a whole toward the surface of the main reflector of the main reflector 121, similarly to the planar body 148 of the main reflector of the main reflector 121. There is. Then, the sub-reflector 131 reflects the radio wave radiated from the radiator 110 toward the main reflector of the main reflector 121. Therefore, the sub-reflector 131 is arranged at a predetermined distance from the radiator 110 and the main reflector.
- FIG. 7 is a diagram conceptually showing the arrangement position of the sub-reflector 122 according to the first embodiment of the present disclosure. Specifically, it is a figure when the arrangement position of the secondary reflector 122 is applied to the example of the Cassegrain type parabola. As is clear from this figure, the sub-reflector 122 is arranged away from the radiator 110 and the main reflector by a distance that allows the radiated radio waves to be reflected by the main reflector and radiated to the outside from the main reflector. ..
- a rotating paraboloid having a focal point of T is formed on the main reflector of the main reflector 121, and a rotating hyperboloid having a focal point of T and T'is formed on the sub-reflector 131 of the sub-reflector 122.
- the Cassegrain antenna is formed by installing the radiator 110 at T'. That is, the sub-reflector 131 is arranged at a position where the focal point T is confocal with respect to the main reflector having the rotating paraboloid of the focal point T.
- the sub-reflector 131 is a rotating hyperboloid having focal points T and T', and the radiator 110 is arranged at the position of the focal point T'. If you want to radiate parallel waves from the main reflector to the outside, it is as described above. However, if you want to radiate radio waves distorted by a desired angle, such as radiating elliptical waves from the main reflector, the main reflector On the line connecting the center of the curved surface and the center of the curved surface of the sub-reflector 131, the position of the sub-reflector 131 can be arranged at a position appropriately deviated from the position from the confocal T and the position from the radiator 110.
- the support rod 132 is arranged so that the sub-reflector 131 of the sub-reflector 122 is separated from the radiator 110 and the main reflector 121 by a predetermined distance.
- the support rod 132 includes a first support rod 133 having one end connected to the sub-reflector 131 and the other end connected to the joint 135, and a second support rod 134 having one end connected to the joint 135 and the other end open.
- the sub-reflector 131 connected to one end of the first support rod 133 is supported by the first support rod 133 and the second support rod 134.
- the support rod 132 is composed of one or more rods to support the sub-reflector 131. In the example of FIG.
- FIG. 3A three pairs of support rods 132 (one of which is covered on the back surface and is not shown) are arranged at equal intervals.
- the first support rod 133 and the second support rod 134 have been described as a pair.
- the number of the second support rods 134 may be smaller or larger than that of the first support rod 133.
- the delivery of the second support rod 134 will be described in detail in FIGS. 6A to 6C and the like.
- the support rod 132 is sent out by the sending device 150 by a predetermined distance.
- the position of the sub-reflector 131 supported by the support rod 132 is moved so as to be placed at a predetermined position. Therefore, the sub-reflector 122, a part of which is housed inside the main body 300 at the time of storage, is configured to be gradually exposed to the outside of the main body 300 by driving the sending device 150.
- the delivery device 150 is arranged inside the main body 300 and movably supports the second support rod 134 of the sub-reflector 122. By movably supporting the sub-reflector 122, the transmitting device 150 reflects the radio wave radiated from the radiator 110 to the main reflector 121 at least at the position of the sub-reflector 122 housed inside. Then, it is moved from the main reflector 121 to a position where it can be radiated to the outside. In the present embodiment, the delivery device 150 delivers the secondary reflector 122 to the above position by the rack gear provided on the second support rod 134 and the pinion gear provided on the delivery device 150 so as to mesh with the rack gear. 6A to 6C and the like will be described in detail.
- FIG. 3B is a diagram showing a configuration of the reflector 120 of the space navigation body 1 according to the first embodiment of the present disclosure in storage.
- the outer surface of the main body 300 is covered with the solar panel 230 of the power supply unit 200, but in FIG. 3B, a part thereof is omitted for the purpose of explaining the inside of the main body 300.
- the plurality of ribs 141 are folded around the hub 143, but the ribs 141 are omitted in FIG. 3B.
- the sub-reflector 122 is housed and arranged inside the main body 300 at the time of storage such as when moving or launching.
- the sub-reflector 122 itself can be housed compactly, and the antenna device 10 as a whole can be housed more compactly.
- the auxiliary reflector 122 is arranged so that the joint 135 connecting the first support rod 133 and the second support rod 134 is substantially in contact with the hub 143 fixed to the pedestal 315 of the main body 300.
- the second support rod 134 whose one end is connected to the lower part of the joint 135 is housed inside the main body 300.
- the sub-reflector 131 and the first support rod 133 are arranged at positions closer to the main body 300 side, unlike the predetermined positions at the time of use.
- the rib 141 (not shown) is folded around the hub 143.
- the rib 141 has elasticity and is urged in the unfolding direction in the folded stored state. Therefore, it has a regulation mechanism 180 for restricting the folded rib 141 from unfolding in the stored state.
- the regulation of the sub-reflector 131 of the sub-reflector 122 is lifted by the movement of the delivery device 150. Then, when the regulation is lifted, the rib 141 expands due to its own elasticity. That is, in the present embodiment, the sub-reflector 122 functions as a deregulation member.
- the regulation mechanisms 180 are provided corresponding to each rib 141. Therefore, in FIG. 3B, the remaining regulatory mechanism 180 is omitted.
- the radiator 110 is not connected to the auxiliary reflector 122 such as the joint 135 even in the retracted state, so that the position is the same as in the deployed state.
- high positional accuracy is required for the distance between the radiator 110 and the sub-reflector 131. If there is sufficient space to accommodate the radiator 110 inside the main body 300, move the radiator 110 together with the sub-reflector 122, and when storing the radiator 110 inside the main body 300. It may be accommodated.
- FIG. 4 is a diagram showing a cross-sectional configuration of the sub-reflector 122 and the main body 300 when the reflector 120 of the space navigation body 1 according to the first embodiment of the present disclosure is stored. ..
- the plurality of ribs 141 are folded around the hub 143, but the ribs 141 are omitted in FIG.
- a plurality of ribs 131a for maintaining the curved surface are provided inside the curved surface of the sub-reflector 131.
- the curved surface of the sub-reflector 131 and one end of each first support rod 133 are fixed by a joint 138.
- the joint 138 known ones such as screws and screw holes can be used.
- the first support rod 133 and the second support rod 134 are fixed to each other via a joint 135.
- the joint 135 may have any shape, but it is desirable that the joint 135 is composed of a single flat plate or a donut-shaped flat plate in order to make the position accuracy of the support rod 132 more accurate. Then, in the stored state, the joint 135 is arranged at a position inside the hub 143 formed in a hollow shape.
- FIG. 4 shows a cross section of the main body 300 when stored. Therefore, the second support rod 134 of the secondary reflector 122 is inserted into the through hole 313 formed in the top plate 311 of the main body 300 and the through hole 314 formed in the middle plate 312 of the main body 300.
- a delivery device 150 for sending the second support rod 134 to the outside of the main body 300 is fixed to the top plate 311 of the main body 300.
- a first sensor device 156 for detecting the start and end of the delivery of the second support rod 134 by the delivery device 150 is fixed to the top plate 311 of the main body 300.
- the rib 141 (not shown) is folded around the hub 143 when stored. It has a regulation mechanism 180 for restricting the folded rib 141 from unfolding in the stored state. Although only one regulation mechanism 180 is drawn in FIG. 4, in the present embodiment, the regulation mechanism 180 is provided corresponding to each rib 141. Therefore, in FIG. 4, the remaining regulatory mechanism 180 is omitted.
- FIG. 5 is a diagram showing a configuration of the sending device 150 according to the first embodiment of the present disclosure.
- a pinion gear 137 is formed on one side on the long side side of the second support rod 134 formed in a long axis shape.
- the second support rod 134 functions as a movable shaft for sending the entire auxiliary reflector 122 to the outside of the main body 300 by the rotation of the rack gear provided separately.
- One end of the second support rod 134 is connected to the first support rod 133 by a joint 135.
- the other end of the second support rod 134 is not directly fixed to other components or the like, but is an open end.
- the first stopper 136d is arranged at the other end of the second support rod 134.
- the first stopper 136d is formed in a convex shape from the other end of the second support rod 134, and is fixed to the bottom plate 316 of the main body 300 with screws 318 and fitted to the second stopper 317 formed in a concave shape. This prevents the second support rod 134 from being shaken from side to side due to vibration or the like.
- the shapes of the first stopper 136d and the second stopper 317 are formed to be convex or concave, they may have opposite shapes. Further, the positioning is not limited to this, and positioning may be performed by another positioning method such as a magnet.
- the delivery device 150 for transmitting the second support rod 134 to the outside of the main body 300 includes a rotation mechanism 151 including a rack gear fitted to the pinion gear 137 of the second support rod 134, and a rotation mechanism. It includes at least a motor 152 for rotating 151 around a rotation shaft 153 and a first sensor device 156 for detecting a delivery position of the second support rod 134.
- the motor 152 which functions as a driving unit of the rotating mechanism 151, is fixed to the top plate 311 of the main body 300. Then, the rotation shaft 153 of the motor 152 rotates to rotate the rotation mechanism 151 fixed to the rotation shaft 153.
- a rack gear is formed on the outer periphery of the rotating mechanism 151, and fits the unevenness of the gear with the unevenness of the pinion gear 137 of the second support rod 134.
- the first sensor device 156 of the delivery device 150 is arranged on the long side of the second support rod 134 on the side where the pinion gear is not provided, and is fixed to the top plate 311 of the main body 300.
- the first sensor device 156 has a protrusion 155 that is always urged in a direction perpendicular to the second support rod 134 and is slidably formed in that direction. The protrusion 155 comes into contact with the concave groove 136a of the second support rod 134 before the transmission of the sub-reflector 122 is started.
- the second support rod 134 moves, so that the protrusion 155 comes into contact with the long side of the second support rod 134 on the side where the pinion gear is not provided. Then, when the sub-reflector 122 reaches a predetermined position, the protrusion 155 comes into contact with the concave groove 136b of the second support rod 134.
- the first sensor device 156 detects the start and end of the transmission of the sub-reflector 122.
- the concave groove 136a and the concave groove 136b each function as a transmission start / end detection mechanism.
- FIGS. 6A to 6C are diagrams conceptually showing the operation of the transmission device 150 according to the first embodiment of the present disclosure. Specifically, FIG. 6A shows a state in which the antenna device 10 is in the retracted state and before the transmission of the sub-reflector 122 is started. Further, FIG. 6B shows a state in which the antenna device 10 is deployed and the sub-reflector 122 is being transmitted. Further, FIG. 6C shows a state when the deployment of the antenna device 10 is completed and the transmission of the sub-reflector 122 is completed.
- the rotation mechanism 151 is not rotated and the second support rod 134 is also in the initial position before the transmission of the sub-reflector 122 is started.
- the protrusion 155 of the first sensor device 156 is always urged in the direction of the second support rod 134, and the protrusion 155 is in contact with the concave groove 136a of the second support rod 134 due to this urging. Therefore, the switch 154 is maintained in the off state.
- the rotation mechanism 151 starts rotating about the rotation shaft 153 along the delivery direction of the second support rod 134, that is, the direction of the arrow D. .. Then, the rack gear formed on the surface of the rotating mechanism 151 and the pinion gear 137 formed on the second support rod 134 are fitted to each other, and the second support rod 134 is indicated by an arrow as the rotating mechanism 151 rotates. It is sent in the direction of F.
- the protrusion 155 that was urged in the direction of the second support rod 134 and was in contact with the concave groove 136a is provided with the first sensor device by the side 136c on the side of the second support rod 134 provided with the concave groove 136a. It is pushed down in the direction toward the inside of 156, that is, in the direction of arrow E. As a result, it is detected that the switch 154 is switched to the ON state and the delivery of the second support rod 134 is started. In the present embodiment, the switch 154 is always in the ON state during the transmission.
- the second support rod 134 when the second support rod 134 is sent out by the rotation of the rotation mechanism 151 and the sub-reflector 131 connected to the second support rod 134 reaches a predetermined position, it is formed in advance corresponding to that position.
- the protrusion 155 of the first sensor device 156 comes into contact with the recessed groove 136b. Then, the protrusion 155 urged in the direction of the second support rod 134 moves in the direction of the second support rod 134, that is, in the direction of the arrow G.
- the switch 154 of the first sensor device 156 is switched off, and the end of the delivery of the second support rod 134 is detected.
- the processor 320 transmits a rotation end signal to the motor 152 that drives the rotation mechanism 151. As a result, the rotation of the rotation mechanism 151 is stopped, and the delivery of the second support rod 134 is also completed.
- FIG. 8A is a diagram showing a mounting structure of the rib 141 and the hub 143 according to the first embodiment of the present disclosure.
- the mounting structure of one of the plurality of ribs 141 and the hub 143 is shown, but the other ribs 141-2 to 141-n are also shown. It is mounted on the hub 143 with a similar mounting structure.
- the hub 143 has an inner peripheral surface 143b formed in a columnar shape and an outer peripheral surface 143a formed in the shape of a polygonal prism (for example, a 24-square prism).
- the outer peripheral surface 143a has a rib mounting portion 146 formed in a plane shape according to the number of ribs 141 to be mounted.
- the rib mounting portion 146 is formed with a plurality of rib mounting holes 144 (for example, one rib mounting hole 144 has four holes) arranged at predetermined intervals.
- each rib mounting hole 144 is provided in the rib mounting portion 146 formed in a plane on the outer peripheral surface 143a. Then, the inner side surface of the rib 141 on the end portion 142a side is fixed along the plane of the rib mounting portion 146.
- the rib 141 is fixed so as to be along the outer circumference of the hub 143, specifically, along the flat rib mounting portion 146.
- the rib 141 may be fixed so as to be along the outer periphery of the hub 143, specifically, along the tangent line of the circumscribed circle of the outer peripheral surface 143a of the hub 143.
- a hinge may be installed in each rib mounting portion 146 and fixed to the hinge.
- the hub 143 is formed in a substantially 24-sided shape and includes 24 rib mounting portions 146.
- the present invention is not limited to this, and different numbers of ribs 141 can be used, and different numbers of rib mounting portions 146 can be used.
- FIG. 8B is a diagram showing a folding structure of the rib 141 and the hub 143 according to the first embodiment of the present disclosure.
- FIG. 8B for convenience of explanation, the folding structure of the ribs 141-1 and 141-2 among the plurality of ribs 141 is shown, but the same applies to the other ribs 141-3 to 141-n. ..
- the ribs 141-1 and 141-2 are folded so as to be wound up from the end portion 142a toward the tip portion 142b along the outer circumference of the hub 143.
- the ribs 141-1 and 141-2 are fixed along the outer circumference of the hub 143, respectively (FIG. 8A). Therefore, a large stress due to folding is not generated at the end portion 142a of the rib 141, and the rib 141 can be stably stored.
- the rib 141 has a spiral shape (with respect to the rotating surface formed by the rib 141) so that the tip portion 142b is located at the same height as or substantially the same height as the height of the terminal portions 142a of the ribs 141-1 and 141-2.
- the regulation mechanism 180 restricts the rib 141 from expanding during storage.
- FIG. 9 is a diagram showing a folding structure of the rib 141 according to the first embodiment of the present disclosure. Specifically, FIG. 9 is a view of the space navigation body 1 when the antenna device 10 is stored as viewed from above.
- the sub-reflector 131, the upper part of the first support rod 133, the radiator 110, a part of the rib 141, and the like are omitted for convenience of explanation.
- each rib 141 is fixedly attached to each rib mounting portion 146 provided on the outer circumference of the hub 143. Further, each rib 141 has elasticity in the direction of development, that is, in the direction of arrow B. At the time of storage, it is wound and folded along the outer circumference of the hub 143 against this elastic force.
- the regulation mechanism 180 for restricting the hub 143 from unfolding at the time of storage is provided corresponding to each rib 141 or each rib mounting portion 146. Therefore, in the present embodiment, since 24 ribs are used, 24 regulatory mechanisms 180 are also provided, but in FIG. 9, only 3 are drawn and others are omitted for convenience of explanation.
- the number of regulating mechanisms 180 does not necessarily correspond to the number of ribs 141 or rib mounting portions 146, and can be appropriately adjusted according to the rigidity of the regulating member.
- the regulation mechanism 180 includes a regulation member 182 (182-1 to 182-n) and a pin 181 (1811-181-n) for locking the regulation member 182. Since one end of the regulating member 182 is fixed to the top plate 311 or the hub 143 of the main body 300 in the stored state, one end of the regulating member 182 does not come off from the top plate 311 or the hub 143 even after deployment. On the other hand, the other end is locked to a pin 181 provided on the joint 135 of the secondary reflector 122. As long as the other end of the regulating member 182 can be locked to the pin 181 by any means, any member such as a plate shape or a rod shape can be used.
- the shape of the regulating member 182 is preferably an elongated member such as a string shape, a rod shape, or a wire shape in consideration of ease of regulation after folding. Further, as a property of the regulating member 182, it is desirable that the member is flexible or has flexibility.
- any of inorganic fibers such as carbon fiber, glass fiber and basalt fiber, metal fiber such as steel fiber and stainless fiber, and organic fiber such as aramid fiber, vinylon fiber and polyethylene fiber. It may be one or a combination thereof.
- various organic materials, stainless steel, steel, tungsten, titanium, phosphor bronze, brass and other materials can be appropriately combined and used.
- the restricting member 182 regulates the deployment of the rib 141 by winding the folded rib 141 after the rib 141 is folded along the outer circumference of the hub 143. Therefore, when vibration such as movement is applied, the regulating member 182 may be rubbed by the rib 141 formed in a plate shape and may be cut. Therefore, in order to prevent this, at least the area of the regulating member 182 in contact with the rib 141 can be covered with the covering member 185.
- the material of the covering member 185 include inorganic fibers such as carbon fibers, glass fibers and basalt fibers, metal fibers such as steel fibers and stainless fibers, aramid fibers, vinylon fibers and polyethylene fibers. It may be any one of the organic fibers of the above, or a combination thereof. In addition to these fiber-based materials, various organic materials, stainless steel, steel, tungsten, titanium, phosphor bronze, brass and other materials can be appropriately combined and used.
- the operation diagram 11A of the regulation mechanism 180 is a diagram conceptually showing the regulation state of the rib 141 according to the first embodiment of the present disclosure. Further, FIG. 11B is a diagram conceptually showing the regulated state of the rib 141 according to the first embodiment of the present disclosure.
- FIG. 11A is a diagram showing a stored state in which the rib 141 is folded along the outer circumference of the hub 143 and the deployment is restricted by the regulating member 182.
- one end of the regulating member 182 is fixed to the top plate 311 of the main body 300 with screws.
- the regulating member 182 is wound so as to bundle the ribs 141 folded along the outer circumference of the hub 143, and passes through the gap formed between the inner surface of the hub 143 and the joint 135 of the sub-reflector 122.
- the other end is locked to the pin 181.
- the regulating member 182 has a locking ring 183 at the tip on the other end side, and the locking ring 183 is locked so as to be caught by the pin 181.
- the second support rod 134 is delivered by the rotation mechanism 151 of the delivery device 150, and the joint 135 for fixing one end of the second support rod 134 and the first support rod 133 (not shown) is It has a pin 181 on the inner surface side of the hub 143.
- the pin 181 extends from the joint 135 in a direction opposite to the direction in which the joint 135 is delivered by the delivery device 150. Further, the tip of the pin 181 is inserted into a recess 319 formed on the upper surface side of the top plate 311. This makes it difficult for the locking ring 183 at the tip of the regulating member 182 to come off when it is neglected.
- one end of the regulation member 182 is fixed to the top plate 311 by a screw.
- the present invention is not limited to this, and any member such as the hub 143 that is not moved by the delivery device 150 may be fixed. Further, although one end of the regulation member 182 is fixed, this one end may also be simply locked.
- the pin 181 is arranged at the joint 135, but if it is a member moved by the sending device 150, it may be arranged at another member such as the second support rod 134 or the first support rod 133. It is possible.
- FIG. 11B is a diagram showing a state in which the rib 141 is in the process of being deployed after the restriction of deployment by the regulating member 182 is released.
- the rotation mechanism 151 starts rotating by driving the motor 152 of the delivery device 150.
- the second support rod 134 having the pinion gear 137 into which the rack gear provided on the outer circumference of the rotation mechanism 151 is fitted is sent out to the outside of the main body 300, that is, in the direction of the arrow H.
- the joint 135, the first support rod 133, and the sub-reflector 131 are all moved.
- the pin 181 provided from the joint 135 in the direction opposite to the moving direction also moves in the direction of the arrow H as the sub-reflector 131 and the joint 135 move. Therefore, the locking ring 183 of the regulatory member 182 that was locked to the pin 181 is disengaged from the pin 181. That is, in the present embodiment, the sub-reflector 122 including the sub-reflector 131, the joint 135, and the like functions as the regulation release member.
- the rib 141 is urged in the direction of development by its own elasticity, that is, in the direction of arrow I. Therefore, when the regulating member 182 is unlocked, its elasticity makes it possible to deploy in the direction of the arrow I. At this time, the regulating member 182 is repelled in the direction of the arrow J by the elastic force of the rib 141, but the regulating member 182 has flexibility or flexibility to the extent that it is repelled by the elastic force of the rib 141. , Does not hinder the deployment of rib 141.
- the rib 141 having elasticity was used in this embodiment, it is not always necessary to have elasticity. For example, it is possible to deploy it by using a driving force such as a motor from a folded state using a hinge or the like.
- FIG. 12 is a diagram showing a processing sequence of each device performed by the space navigation body 1 according to the first embodiment of the present disclosure.
- the processor 320 mainly provided in the computer 301 controls the transmission device 150 by executing the program stored in the memory 310 to transmit the second support rod 134, and the secondary reflector 131. Is delivered to a predetermined position, and the processing flow when the rib 141 of the main reflector 121 is expanded is shown.
- the communication unit provided in the space navigation body 1 receives an unlock signal from the ground station to unlock the second support rod 134 to prevent it from moving due to vibration. Then, when the lock is released and it is detected that the second support rod 134 is ready for transmission (S11), a transmission instruction signal T11 is sent to the transmission device 150 in order to transmit the second support rod 134. To send.
- the transmission device 150 When the transmission device 150 receives the transmission instruction signal T11, the transmission device 150 turns on the power of the motor 152 and starts driving the motor 152 (S12). Then, along with the drive, the rotation mechanism 151 rotatably connected to the rotation shaft 153 of the motor 152 rotates. A rack gear provided on the outer circumference of the rotating mechanism 151 sends a second support rod 134 having a pinion gear fitted to the rack gear to the outside of the main body 300 (S13). At this time, the joint 135, the first support rod 133, and the sub-reflector 131 connected to the second support rod 134 also move together.
- the regulation by the regulation member 182 that regulates the deployment of the rib 141 of the main reflector 121 that has been folded and stored around the hub 143 is released (S14). Due to this deregulation, the main reflector formed by the elastic rib 141 starts to deploy by the elasticity of the rib 141 itself.
- the first sensor device When the second support rod 134 is delivered and the sub-reflector 131 supported by the second support rod 134 and the first support rod 133 reaches a predetermined position, the first sensor device is inserted into the concave groove 136b of the second support rod 134. The protrusions 155 of 156 come into contact with each other. As a result, it is detected that the sub-reflector 131 reaches the position and ends the delivery of the second support rod 134 (S15). Upon receiving this detection, the transmission device 150 transmits the transmission completion signal T12 to the computer 301.
- the computer 301 When the computer 301 receives the transmission completion signal T12 (S16), the computer 301 transmits the motor drive end instruction signal T13 to the transmission device 150.
- the sending device 150 that has received the signal turns off the power of the motor 152 and stops the rotation of the rotating mechanism 151 (S17). As a result, the delivery of the second support rod 134 is completed, and the sub-reflector 131 is arranged at a predetermined position.
- the sub-reflector 122 in the state where the antenna device 10 is housed, at least a part of the sub-reflector 122 is housed inside the main body 300, and the portion housed outside the main body 300 is sent out at the time of deployment. , The sub-reflector 131 is arranged at a predetermined position. As a result, it has been difficult to store the secondary reflector 122 compactly by the height of the secondary reflector 122, but it can be stored more compactly. Further, by moving the sub-reflector 131 to a predetermined position, the regulation of the rib 141 forming the main reflector 121 whose deployment is restricted is released. Since the deregulation is automatically performed with the movement of the sub-reflector 131, it is not necessary to newly add a drive device for deregulation, and the regulation can be more easily deployed.
- FIG. 13 is a diagram conceptually showing the operation of the delivery device 250 according to the second embodiment of the present disclosure.
- one end of the second support rod 231 of the secondary reflector 122 is connected to the first support rod 133 (not shown) via a joint 135 (not shown) as in the first embodiment.
- a nut 232 is connected to the other end of the second support rod 231.
- the second support rod 231 is formed in a hollow shape for inserting the screw shaft 255 into the second support rod 231.
- the nut 232 is fixed to the tip of the second support rod 231 and has a donut shape having a hole for inserting the screw shaft 255 inside.
- a groove 233 is formed on the inner surface of the nut 232 so as to fit into a screw thread formed on the surface of the screw shaft 255.
- the delivery device 250 includes a motor 253, a rotation shaft 254 of the motor 253, and a screw shaft 255.
- the delivery device 250 is fixed to the bottom plate 316 of the main body 300.
- One end of the screw shaft 255 is fixed to the rotating shaft 254 of the motor 253. Therefore, when the motor 253 is driven and the rotating shaft 254 rotates, the screw shaft 255 also rotates in the same direction.
- the screw shaft 255 is formed in a long-axis columnar shape, and is inserted inside a second support rod 231 formed in a hollow cylindrical shape in the retracted state of the antenna device 10. Further, the screw shaft 255 is formed with threads on substantially the entire outer peripheral surface thereof so as to fit into the groove 233 of the nut 232.
- the screw shaft 255 is inserted inside the second support rod 231 as described above. After that, the screw shaft 255 rotates around the rotation shaft 254 as the motor 253 of the delivery device 250 is driven.
- the second support rod 231 is sent out along the screw shaft 255 toward the outside of the top plate 311 of the main body 300 along with the nut 232 as the screw shaft 255 rotates. As a result, the second support rod 231 is sent out, and the first support rod 133 and the sub-reflector 131 connected to the second support rod 231 are moved so as to be in a predetermined position.
- the second support rod 231 includes a concave groove 235a and a concave groove 235b with which the protrusion 155 of the first sensor device 156 abuts. Therefore, as in the first embodiment, the concave groove 235a can detect the start of the delivery of the second support rod 231 and the concave groove 235b can detect the end of the delivery of the second support rod 231.
- the sub-reflector 122 in the state where the antenna device 10 is housed, at least a part of the sub-reflector 122 is housed inside the main body 300, and the portion housed outside the main body 300 is sent out at the time of deployment. , The sub-reflector 131 is arranged at a predetermined position. As a result, it has been difficult to store the secondary reflector 122 compactly by the height of the secondary reflector 122, but it can be stored more compactly. Further, by moving the sub-reflector 131 to a predetermined position, the regulation of the rib 141 forming the main reflector 121 whose deployment is restricted is released. Since the deregulation is automatically performed with the movement of the sub-reflector 131, it is not necessary to newly add a drive device for deregulation, and the regulation can be more easily deployed.
- FIG. 14A is a diagram conceptually showing the regulated state of the rib 141 according to the third embodiment of the present disclosure.
- FIG. 14B is a diagram conceptually showing the regulated state of the rib 141 according to the third embodiment of the present disclosure.
- FIG. 14A is a diagram showing a stored state in which the rib 141 is folded along the outer circumference of the hub 143 and the deployment is restricted by the regulating member 282.
- the regulatory member 282 is wound around the ribs 141 that are folded along the outer circumference of the hub 143 so as to bundle them together.
- the regulating member 282 passes through the through hole 281 formed in the joint 135 and is fixed to the top plate 311 by the screw 283. That is, in the present embodiment, when the rib 141 is regulated by the regulating member 282, both one end and the other end of the regulating member 282 are fixed to either member by the screws 283 and 284.
- the joint 135 has a blade 285 that extends along the direction in which the joint 135 moves by the delivery device 150.
- the regulating member 282 is provided in the direction in which the joint 135 moves with respect to the blade 285.
- FIG. 14B is a diagram showing a state in which the rib 141 is in the process of being deployed after the restriction of deployment by the regulating member 282 is released.
- the second support rod 134 is delivered in the direction of arrow H by the delivery device 150, and the sub-reflector 131 (not shown) and the joint 135 also move accordingly.
- the joint 135 has a blade 285 that extends along the direction in which the joint 135 moves by the delivery device 150.
- the regulating member 282 is wound around the blade 285 so as to move the joint 135. Therefore, as the joint 135 moves, the blade 285 moves in the direction of the regulating member 282, which cuts the regulating member 282.
- the regulation of the regulating member is released, and the rib 141 expands in the direction of expansion, that is, in the direction of arrow I, due to its own elastic force.
- the blade 285 was arranged at the joint 135, but the arrangement position is not limited to the joint 135. That is, the blade 285 is a member that moves with the movement of the sub-reflector 131, and may be any position as long as the regulating member 282 is provided in the moving direction at the time of storage.
- the sub-reflector 122 in the state where the antenna device 10 is housed, at least a part of the sub-reflector 122 is housed inside the main body 300, and the portion housed outside the main body 300 is sent out at the time of deployment. , The sub-reflector 131 is arranged at a predetermined position. As a result, it has been difficult to store the secondary reflector 122 compactly by the height of the secondary reflector 122, but it can be stored more compactly. Further, by moving the sub-reflector 131 to a predetermined position, the regulation of the rib 141 forming the main reflector 121 whose deployment is restricted is released. Since the deregulation is automatically performed with the movement of the sub-reflector 131, it is not necessary to newly add a drive device for deregulation, and the regulation can be more easily deployed.
- the member that functions as the deregulation member is not limited to the sub-reflector 122.
- another member can be used as a deregulation member. It is possible to use it.
- it may be a dedicated member for releasing the regulation in response to a transmission instruction (T11 in FIG. 12) from the ground station, or another member that needs to move with the deployment of the main reflector 121 may be used as the regulation release member. ..
- the concave grooves 136a and 136c, or the concave grooves 235a and 235b were used.
- the delivery state of the second support rod 134 may be detected by using another method.
- the antenna device 10 in which the main reflector is formed in a parabola shape has been described as an example, but a method of transmitting radio waves via the sub-reflector 131. Any antenna device that can be used can be applied. Further, in the first embodiment and the second embodiment, the case of the Cassegrain antenna has been described, but the sub-reflector 122, the main reflector 121, and the radiator 110 such as the Gregorian antenna are arranged at a certain distance from each other. Any antenna that can be used can be suitably applied.
- the antenna device 10 can also be used for other purposes. is there.
- it can be installed in an aircraft or an automobile and used as a mobile communication device.
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Abstract
Description
1.宇宙航行体1の構成
図1は、本開示の第1実施形態に係る宇宙航行体1の構成を示す図である。図1によると、宇宙航行体1は、宇宙空間において宇宙航行体1そのものの航行の制御や宇宙航行体1の動作や姿勢の制御を行う制御ユニット等が搭載された本体300と、宇宙空間において本体300や輻射器110を含む様々な構成要素を駆動するための電力を供給する電源ユニット200と、宇宙航行体1と地上又は他の宇宙航行体との間で情報の送受信を行ったり観測用のレーダーの送受信を行ったりするための通信ユニット100とを含む。
本実施形態において、反射器120は、移動や打ち上げ時の未使用時にはコンパクトに収納されて、宇宙空間において使用される場合に展開される。図3Aは、本開示の第1実施形態に係る宇宙航行体1の反射器120を展開時の構成を示す図である。
まず、図3Aによると、本実施形態に係る宇宙航行体1は、主反射器121及び副反射器122を含む反射器120、輻射器110、送出装置150を少なくとも含むアンテナ装置10を有する。具体的には、当該アンテナ装置10は、輻射器110と、輻射器110に対して所定の角度をもって対向するように配置され、輻射器110から放射される電波を主反射器121の主リフレクタに反射するための副反射器122と、副反射器122の副リフレクタ131に対向するように配置され、副リフレクタ131により反射された電波をさらに反射して外部へ電波を放射する主反射器121の主リフレクタと、副リフレクタ131を支持するための支持ロッド132と、主リフレクタの展開にともなって副リフレクタ131を送出するための送出装置150と、を含む。アンテナ装置10は、ハブ143が宇宙航行体1の台座315に固定されることにより、宇宙航行体1に設置される。
主反射器121を構成する主リフレクタは、複数のリブ141、面状体148等を含む。主反射器121は、上記のとおり主反射鏡として機能するために、その反射面がパラボラ(放物)形状に形成されている。
副反射器122は、主反射器121の主リフレクタに対向して配置される副リフレクタ131と、当該副リフレクタ131を輻射器110から所定距離だけ離隔して配置するための支持ロッド132を含む。
送出装置150は、本体300の内部に配置され、副反射器122の第2支持ロッド134を移動可能に支持する。送出装置150は、副反射器122を移動可能に支持することによって、少なくとも一部が内部に収納された副反射器122の位置を、輻射器110から輻射された電波を主反射器121に反射して主反射器121から外部へ放射可能な位置になるまで、移動させる。本実施形態では、第2支持ロッド134に設けられたラックギアと、それに噛み合うように送出装置150に設けられたピニオンギアとによって、送出装置150が上記位置まで副反射器122を送出するが、図6A~図6C等において詳細に説明する。
図3Bは、本開示の第1実施形態に係る宇宙航行体1の反射器120を収納時の構成を示す図である。なお、本実施形態では本体300はその外面が電源ユニット200のソーラーパネル230によって被覆されているが、図3Bは本体300の内部の説明のために、その一部を省略する。また、本実施形態では、複数のリブ141がハブ143を中心に折り畳まれているが、図3Bではリブ141は省略する。
図4は、本開示の第1実施形態に係る宇宙航行体1の反射器120を収納時の副反射器122及び本体300の断面の構成を示す図である。本実施形態では、複数のリブ141がハブ143を中心に折り畳まれているが、図4ではリブ141は省略する。図4によると、副リフレクタ131の曲面内部には、その曲面を維持するための複数のリブ131aが設けられている。また、副リフレクタ131の曲面と各第1支持ロッド133の一端とが、ジョイント138によって固定されている。ジョイント138はネジとネジ穴など、公知のものを利用することが可能である。
図5は、本開示の第1実施形態に係る送出装置150の構成を示す図である。図5によると、長軸状に形成された第2支持ロッド134の長辺側の一辺にピニオンギア137が形成されている。これによって、第2支持ロッド134は、別途設けられたラックギアの回動によって副反射器122全体を本体300の外部に送出するための可動軸として機能する。第2支持ロッド134の一端はジョイント135によって第1支持ロッド133と接続されている。第2支持ロッド134の他端は、他の構成要素等に直接固設されることはなく、開放端となっている。ただし、アンテナ装置10の収納状態における副反射器122の振動を抑制するために、第2支持ロッド134の他端には第1ストッパ136dが配置される。第1ストッパ136dは、一例としては第2支持ロッド134の他端から凸状に形成され、本体300の底板316にビス318で固定され凹状に形成された第2ストッパ317に嵌合する。これによって、振動等によって第2支持ロッド134が左右に揺さぶられるのを防止する。なお、第1ストッパ136d及び第2ストッパ317の形状を凸状又は凹状に形成したが、それぞれ逆の形状であってもよい。また、それに限らず、マグネットなど他の位置決め方法により位置決めするようにしてもよい。
図6A~図6Cは、本開示の第1実施形態に係る送出装置150の動作を概念的に示す図である。具体的には、図6Aは、アンテナ装置10が収納状態であって、副反射器122の送出が開始される前の状態を示す。また、図6Bは、アンテナ装置10が展開され、副反射器122が送出されている途中の状態を示す。また、図6Cは、アンテナ装置10の展開が完了し、副反射器122の送出が完了するときの状態を示す。
図8Aは、本開示の第1実施形態に係るリブ141とハブ143との取付構造を示す図である。なお、図8Aにおいては、説明の便宜上、複数のリブ141の内の一つのリブ141-1とハブ143との取付構造を図示しているが、その他のリブ141-2~141-nについても同様の取付構造でハブ143に取り付けられる。
図11Aは、本開示の第1実施形態に係るリブ141の規制状態を概念的に示す図である。また、図11Bは、本開示の第1実施形態に係るリブ141の規制状態を概念的に示す図である。
図12は、本開示の第1実施形態に係る宇宙航行体1が行う各装置の処理シーケンスを示す図である。具体的には、主にコンピュータ301内に設けられたプロセッサ320がメモリ310に記憶されたプログラムを実行することによって、送出装置150を制御して、第2支持ロッド134を送出し、副リフレクタ131を所定位置まで送出するとともに、主反射器121のリブ141を展開するときの処理フローを示す。
第1実施形態では、副リフレクタ131の移動のために、送出装置150及び第2支持ロッド134にラックギア及びピニオンギアを用いる場合について説明した。第2実施形態においては、ラックギア及びピニオンギアに代えて、ボールねじを用いる場合について説明する。なお、本実施形態は、以下で具体的に説明する点を除いて、第1実施形態における構成と同様である。したがって、それらの事項の詳細な説明は省略する。
第1実施形態及び第2実施形態では、規制機構180の規制部材182の他端がピン181に係止され、副リフレクタ131の移動に伴って係脱する場合について説明した。第3実施形態においては、ピン181を用いて係止・係脱させる代わりに、刃285を用いて規制機構280の規制部材182を切断して規制を解除する場合について説明する。なお、本実施形態は、以下で具体的に説明する点を除いて、第1実施形態における構成と同様である。したがって、それらの事項の詳細な説明は省略する。
第1実施形態、第2実施形態、及び第3実施形態においては、副反射器122が規制解除部材として機能する場合について説明した。しかし、規制解除部材として機能させる部材は副反射器122のみに限らない。例えば、副反射器122が移動せず固定的に設置されているような場合、又は副反射器122が移動可能に設置されているような場合であっても、他の部材を規制解除部材として利用することが可能である。例えば、地上局からの送出指示(図12のT11)を受けて規制を解除する専用部材であったり、主反射器121の展開と共に移動を要する他の部材を規制解除部材として利用することもできる。
10 アンテナ装置
100 通信ユニット
120 反射器
121 主反射器
122 副反射器
150 送出装置
180 規制機構
200 電源ユニット
300 本体
Claims (13)
- 折り畳まれた収納状態から展開可能に形成される複数のリブと、前記複数のリブの各々の間に架設され輻射器から輻射された電波を反射して外部に放射可能に構成された面状体とを含む主反射器と、
前記収納状態において前記複数のリブの展開を規制し、前記主反射器とは異なる規制解除部材の動作によって前記規制が解除されるように構成された規制部材と、
を含むアンテナ装置。 - 前記複数のリブの各々は、弾性を有し、前記弾性によって前記収納状態から展開する、請求項1に記載のアンテナ装置。
- 前記複数のリブの各々は、断面が円形状、楕円形状又は多角形状に形成されるハブを中心に折り畳まれる、請求項1又は2に記載のアンテナ装置。
- 前記複数のリブの各々は、一端が前記ハブの外周に沿うように前記ハブに接続される、請求項3に記載のアンテナ装置。
- 使用時に、前記主反射器に対向し、輻射器から輻射された前記電波を前記主反射器に反射する副リフレクタを含む副反射器、をさらに含む、請求項1~4のいずれか一項に記載のアンテナ装置。
- 前記副反射器は、前記副リフレクタが使用時に前記電波を前記主反射器に反射する位置になるように移動可能に構成される、請求項5に記載のアンテナ装置。
- 前記規制解除部材は前記副反射器である、請求項6に記載のアンテナ装置。
- 前記副リフレクタはモーターの駆動により前記位置まで移動する請求項6又は7に記載のアンテナ装置。
- 前記規制部材は、前記収納状態において少なくとも一端が係脱可能に係止され、前記副リフレクタの移動により前記一端が係脱されることによって前記規制が解除される、請求項6~8のいずれか一項に記載のアンテナ装置。
- 前記一端は、前記収納状態において前記副リフレクタの移動に伴って移動する係止部材に係止される、請求項9に記載のアンテナ装置。
- 前記規制部材は、前記収納状態において一端及び他端が固定され、前記副リフレクタの移動により前記規制部材が切断されることによって前記規制が解除される、請求項6~10のいずれか一項に記載のアンテナ装置。
- 前記規制部材は、可撓性又は柔軟性を有し、紐状、帯状、棒状又はワイヤ状である、請求項1~11のいずれか一項に記載のアンテナ装置。
- 請求項1~12のいずれか一項に記載のアンテナ装置、を含む宇宙航行体。
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JPH0570012U (ja) * | 1992-02-27 | 1993-09-21 | 三菱電機株式会社 | 展開型パラボラアンテナ |
JPH09266408A (ja) | 1996-03-28 | 1997-10-07 | Mitsubishi Electric Corp | 可動ビームアンテナ装置 |
JP2005086698A (ja) | 2003-09-10 | 2005-03-31 | Nippon Telegr & Teleph Corp <Ntt> | 展開アンテナ |
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