Two-axis drive mechanism, antenna device, and two-axis adjustment method

Abstract

To provide antenna equipment that can be manufactured, installed, and operated at low cost. [Solution] The two-axis drive mechanism of the antenna device comprises a motor, a motor case fixed to the antenna portion and supported so as to be rotatable together with the antenna portion around a first axis coaxial with the motor's rotation axis, a bearing structure that supports the motor case so as to be rotatable around a second axis in a direction intersecting the first axis, a conversion unit that converts the rotation of the motor's rotation axis into rotation around the second axis, and a switching unit that controls the operation of the motor's rotation axis to switch between rotation around the first axis and rotation around the second axis.

Description

Technical Field

[0001] The present disclosure relates to a two-axis drive mechanism, an antenna device, and a two-axis adjustment method.

Background Art

[0002] There is a bidirectional communication antenna capable of bidirectional data communication for reception and transmission. In this bidirectional communication antenna, in order to realize bidirectional data communication, high-precision directivity is required for the antenna. The directivity is adjusted by driving the antenna in two directions, the azimuth direction and the elevation direction.

[0003] There is an antenna actuator that adjusts the orientation of an antenna by independently moving the antenna in two directions, the azimuth direction and the elevation direction, with one motor (see, for example, Patent Document 1).

[0004] The antenna actuator disclosed in Patent Document 1 includes a clutch having a switching means for switching between a first meshing position and a second meshing position, a first reduction unit that decelerates and transmits the power of the motor through the clutch set in the first meshing position, the motor, and a second reduction unit that decelerates and transmits the power of the motor through the clutch set in the second meshing position. Either the elevation angle or the azimuth angle of the antenna is adjusted by the rotational force transmitted by the first reduction unit, and either the elevation angle or the azimuth angle of the antenna is adjusted by the rotational force transmitted by the second reduction unit.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The following analysis was made by the inventor of the present disclosure.

[0007] The technology disclosed in Patent Document 1 is intended for angle adjustment of large antennas and requires a high-horsepower motor. Such a high-horsepower motor must be positioned independently of the antenna adjustment shaft, and its power must be transmitted after reduction. Multiple components, such as worm gears and conversion gears, will be interposed to transmit power when adjusting the elevation and azimuth angles of the antenna. Furthermore, components for reduction are also essential for fine angle adjustment using a high-horsepower motor.

[0008] In other words, according to the technology disclosed in Patent Document 1, it is necessary to incorporate multiple drive structures into the antenna body, resulting in a larger and more complex structure, and consequently, increased manufacturing costs. Furthermore, the complex drive mechanism needs to be controlled and adjusted, making adjustment difficult. These factors represent a significant burden for users involved in the manufacturing, installation, and operation of antennas.

[0009] This disclosure is made in view of the above circumstances and aims to provide an antenna device that can be manufactured, installed, and operated at low cost. [Means for solving the problem]

[0010] According to the first perspective of this disclosure, Motor and, A motor case is fixed to the antenna section and supported so as to be rotatable together with the antenna section around a first axis coaxial with the rotation axis of the motor, A bearing structure that supports the motor case so as to be rotatable around a second axis in a direction intersecting the first axis, A conversion unit that converts the rotation of the motor's rotating shaft into rotation around the second shaft, A two-axis drive mechanism for the antenna is provided, which includes a switching unit that controls the movement of the motor's rotating shaft to switch between rotation around the first axis and rotation around the second axis.

[0011] According to the second perspective of this disclosure, The aforementioned two-axis drive mechanism, The aforementioned antenna section, Equipped with a support column, The first axis is the elevation axis, The second axis is the azimuth axis, An antenna device is provided in which the azimuth axis is coaxial with the central axis of the support column.

[0012] According to the third perspective of this disclosure, Motor and, A motor case is fixed to the antenna section and supported so as to be rotatable together with the antenna section around a first axis coaxial with the rotation axis of the motor, A bearing structure that supports the motor case so as to be rotatable around a second axis intersecting the first axis, A conversion unit that converts the rotation of the motor's rotating shaft into rotation around the second shaft, A method for adjusting the orientation of an antenna in a two-axis drive mechanism comprising a switching unit that controls the operation of the motor's rotating shaft to switch between rotation around the first axis and rotation around the second axis, wherein the control unit controls the operation of the switching unit. The system accepts an instruction for either the rotation around the first axis or the rotation around the second axis, The switching unit is switched so that the antenna unit rotates in the adjustment direction that has been received. Start the aforementioned motor, A two-axis adjustment method is provided, which stops the motor when it receives an instruction to complete the adjustment. [Effects of the Invention]

[0013] According to this disclosure, it is possible to provide an antenna device that can be manufactured, installed, and operated at low cost. [Brief explanation of the drawing]

[0014] [Figure 1] (a) is a front view of an example of an antenna device according to this disclosure. (b) is a side view of an example of an antenna device according to this disclosure. [Figure 2] This is an explanatory diagram illustrating an example of a two-axis drive mechanism for an antenna device according to one embodiment of the present disclosure. [Figure 3](a) is an explanatory diagram for explaining an example of the operation of a two-axis drive mechanism during azimuth angle adjustment of an antenna device according to an embodiment of the present disclosure, and (b) is an explanatory diagram for explaining an example of the operation of the two-axis drive mechanism during elevation angle adjustment thereof. [Figure 4] It is a flowchart of an example of control processing by a control unit according to an embodiment of the present disclosure. [Figure 5] It is an explanatory diagram for explaining an example of a two-axis drive mechanism of an antenna device according to an embodiment of the present disclosure. [Figure 6] (a) is an explanatory diagram for explaining an example of the operation of a two-axis drive mechanism during azimuth angle adjustment of an antenna device according to an embodiment of the present disclosure, and (b) is an explanatory diagram for explaining an example of the operation of the two-axis drive mechanism during elevation angle adjustment thereof. [Figure 7] (a) to (d) are explanatory diagrams for explaining a modification example of a fixing mechanism of the antenna device of the present disclosure. [Figure 8] It is an explanatory diagram for explaining a modification example of a fixing mechanism of the antenna device of the present disclosure. [Figure 9] It is an explanatory diagram for explaining a modification example of a two-axis drive mechanism of the antenna device of the present disclosure. [Figure 10] It is a hardware configuration diagram of an example of a control unit of the antenna device of the present disclosure.

Mode for Carrying Out the Invention

[0015] The present disclosure is not limited to only the following embodiments, and various modifications are possible without departing from the gist of the present disclosure. Also, the drawings are schematic, and the ratios of each dimension etc. may be different from the actual ones. Specific dimensions etc. should be determined in consideration of the following description. Also, there are parts where the relationships and ratios of the dimensions to each other are different among the drawings. The reference signs in the drawings are appended to each element for convenience as an example to assist understanding, and are not intended to limit the present disclosure to the illustrated embodiments.

[0016] <<First Embodiment>> First, the external configuration of the two-axis driven antenna device (hereinafter simply referred to as antenna device 100) of the first embodiment of this disclosure will be outlined. Figure 1(a) is a front view of antenna device 100 of this embodiment. Figure 1(b) is a side view of antenna device 100. For the purpose of explanation, the x-axis, y-axis, and z-axis are defined as shown in these figures.

[0017] As shown in these figures, the antenna device 100 of this embodiment includes a reflector 110, a radiating power supply unit 120, a support column 140, and a two-axis drive mechanism 200. Hereinafter, the reflector 110 and the radiating power supply unit 120 will be referred to as the antenna unit 150.

[0018] The antenna device 100 can rotate the antenna section 150 around the elevation axis (first axis), allowing adjustment of the orientation of the antenna section 150 in the elevation direction (first axis direction). The antenna device 100 can also rotate the antenna section 150 around the azimuth axis (second axis), allowing adjustment of the orientation of the antenna section 150 in the azimuth direction (second axis direction). In the examples of Figures 1(a) and 1(b), the azimuth axis is the z-axis and the elevation axis is the x-axis.

[0019] [2-axis drive mechanism] The two-axis drive mechanism 200 has a simple configuration and uses a single motor to directly drive the rotation of the motor to adjust the orientation of the antenna section 150 in both the elevation and azimuth directions. In other words, it is a mechanism that drives the antenna section 150 around two axes: the elevation axis and the azimuth axis. An example of the two-axis drive mechanism 200 of the antenna device 100 is shown in Figure 2.

[0020] In this embodiment, the two-axis drive mechanism 200 adjusts the elevation angle by rotating the antenna section 150 around the elevation axis 401. It also adjusts the azimuth angle by rotating the antenna section 150 around the azimuth axis 402.

[0021] As shown in this figure, the two-axis drive mechanism 200 of this embodiment includes a conversion unit 210, a switching unit 220, a control unit 230, a bearing structure unit 240, a fixing mechanism 250, and a motor unit 260.

[0022] The motor unit 260 comprises a motor rotor 261, a motor stator 262, a motor case 263, and a motor shaft 264. When power is supplied to the motor stator 262 from an external source, the motor rotor 261 rotates around its axis of rotation. Hereafter, in this embodiment, the motor rotor 261 will also be referred to as the motor.

[0023] The motor shaft 264 is both the rotation axis and the output shaft of the motor rotor 261. In other words, the motor rotor 261 rotates together with the motor shaft 264.

[0024] The motor case 263 holds the motor rotor 261 and motor stator 262 inside and physically protects them. In this embodiment, the motor unit 260 is attached to the antenna unit 150 such that the motor shaft 264 is coaxial with the elevation axis 401 of the antenna unit 150. At this time, the motor case 263 supports the antenna unit 150 so that it can rotate around the motor shaft 264. In other words, it supports the antenna unit 150 so that it can rotate around the elevation axis 401.

[0025] The type of motor is not particularly restricted. For example, a stepping motor would also be acceptable.

[0026] The conversion unit 210 converts the rotation of the motor shaft 264, that is, the rotation around the elevation axis 401, into rotation around the azimuth axis 402. In this embodiment, the conversion unit 210 includes a first bevel gear 211 and a second bevel gear 212.

[0027] The first bevel gear 211 is positioned to rotate in conjunction with the rotation of the motor shaft 264. That is, the first bevel gear 211 rotates around the elevation axis 401 due to the rotational power of the motor.

[0028] The second bevel gear 212 is fixed, for example, to a support column 140 whose central axis is parallel to the azimuth axis 402, and generates rotation of the antenna section 150 in the direction of the azimuth axis 402. In this embodiment, the second bevel gear 212 meshes with the first bevel gear 211 and converts rotational power around the motor shaft 264 (elevation axis 401) into rotation around the azimuth axis 402.

[0029] The switching unit 220 controls the operation of the motor shaft 264 to switch the rotation of the antenna unit 150 between rotation around the elevation axis 401 and rotation around the azimuth axis 402. In this embodiment, it includes an electromagnetic clutch 221 and a third bevel gear 224.

[0030] The third bevel gear 224 is mounted around the motor shaft 264 in a manner that allows it to be independently driven by the motor shaft 264. Furthermore, its rotational drive is controlled by an electromagnetic clutch 221 to allow it to engage with and disengage from the motor shaft 264. In this embodiment, the third bevel gear 224 meshes with the second bevel gear 212 and is mounted in a manner that allows it to control the movement of the second bevel gear 212.

[0031] The electromagnetic clutch 221 controls the connection and disconnection of power using electromagnetic force. This allows the electromagnetic clutch 221 to switch the transmission of rotational power from the motor rotor 261, thereby enabling azimuth and elevation adjustments of the antenna unit 150. In this embodiment, the electromagnetic clutch 221 can switch the connection and disconnection of the rotational power of the motor rotor 261 to the third bevel gear 224. Specifically, the electromagnetic clutch 221 switches between a connected state (connected), where the rotational power of the motor rotor 261 is transmitted to the third bevel gear 224, and a disconnected state (disconnected), where the rotational power of the motor rotor 261 is not transmitted to the third bevel gear 224.

[0032] To achieve this, the electromagnetic clutch 221 includes an armature 222 attached to the third bevel gear 224 in a manner that is not linked to the rotation of the motor shaft 264, and a rotor 223 provided to rotate in conjunction with (fixed to) the motor shaft 264.

[0033] When the power is turned ON and the electromagnetic clutch 221 is energized, the generated magnetic force attracts the armature 222 to the rotor 223, and the power of the rotor 223 is transmitted to the armature 222. That is, the armature 222 rotates together with the rotor 223, and the third bevel gear 224 to which the armature 222 is attached also rotates. On the other hand, when the power is turned OFF, the magnetic force disappears, and the rotor 223 no longer attracts the armature 222. The armature 222 returns to its original position by the force of a pre-attached component, such as a leaf spring, and the electromagnetic clutch 221 becomes disengaged. As a result, the transmission of power is interrupted, and the rotation of the rotor 223 is not transmitted to the armature 222. That is, it is not transmitted to the third bevel gear 224 attached to the armature 222.

[0034] The bearing structure 240 supports the motor case 263 so that it can rotate around the azimuth axis 402. The bearing structure 240 rotates in conjunction with the rotation of the second bevel gear 212, causing the motor case 263 and the antenna section 150 fixed to the motor case 263 to rotate around the azimuth axis 402. The bearing structure 240 is hollow in the direction of the elevation axis 401.

[0035] The fixing mechanism 250 is a mechanism that fixes the motor case 263 to the bearing structure 240 when adjusting the azimuth angle. In this embodiment, it is implemented, for example, by an electromagnetic clutch. Similar to the electromagnetic clutch 221 of the switching unit 220, when energized, an attractive force is generated between the armature 251 attached to the fixing mechanism 250 and the motor case 263 on the bearing structure 240, and the rotation of the motor case 263 is stopped. The armature 251 may be provided on the motor case 263 side.

[0036] Furthermore, components that are not connected to the motor shaft 264 may be attached, for example, by providing bearings or the like between the component and the motor shaft 264. These components may also be attached to the motor shaft 264 via, for example, cylindrical, self-lubricating bushings.

[0037] The control unit 230 controls the operation of the entire antenna device 100. In this embodiment, it also controls the operation of the two-axis drive mechanism 200 according to instructions from the user. Specifically, it sends instruction signals to the switching unit 220, the fixing mechanism 250, the motor unit 260, etc., and controls their operation.

[0038] In this embodiment, the control unit 230 receives an instruction to start azimuth angle adjustment (azimuth angle adjustment start instruction), an instruction to start elevation angle adjustment (elevation angle adjustment start instruction), and an end instruction.

[0039] The control unit 230 controls the operation of the switching unit 220 and the fixing mechanism 250 in accordance with the start commands for azimuth angle adjustment and elevation angle adjustment, and then rotates the motor rotor 261.

[0040] Specifically, upon receiving an instruction to start azimuth angle adjustment, the control unit 230 turns OFF the electromagnetic clutch 221 of the switching unit 220 and turns ON the electromagnetic clutch of the fixing mechanism 250. In other words, it controls the system to stop supplying power to the electromagnetic clutch 221 and to supply power to the electromagnetic clutch of the fixing mechanism 250. After that, it supplies power to the motor unit 260 and rotates the motor rotor 261.

[0041] Furthermore, when the control unit 230 receives an elevation angle adjustment instruction, it turns on the electromagnetic clutch 221 of the switching unit 220 and turns off the electromagnetic clutch of the fixing mechanism 250. In other words, it supplies power to the electromagnetic clutch 221 and controls the power supply to the electromagnetic clutch of the fixing mechanism 250 to stop. After that, it supplies power to the motor unit 260 and rotates the motor rotor 261.

[0042] On the other hand, upon receiving a termination command, the control unit 230 stops supplying power to the motor unit 260. Alternatively, the settings of the switching unit 220 and the fixing mechanism 250 may be released.

[0043] The antenna device 100 may also be equipped with a receiving device that receives instructions to start azimuth angle adjustment, elevation angle adjustment, and end of adjustment. The receiving device may be implemented, for example, by a button or a switch.

[0044] [Operation] The operation of the two-axis drive mechanism 200 of the antenna device 100 having the above configuration during azimuth angle adjustment and elevation angle adjustment will be described below.

[0045] [When adjusting azimuth] Figure 3(a) shows the operation of the two-axis drive mechanism 200 during azimuth angle adjustment. Azimuth angle adjustment is performed when the user issues an instruction to start azimuth angle adjustment. In this figure, the area 291 enclosed by the dashed line is the part driven by the two-axis drive mechanism 200 during azimuth angle adjustment (azimuth angle adjustment drive area).

[0046] When adjusting the azimuth angle, the control unit 230 switches the switching unit 220 to the azimuth axis direction adjustment mode. Specifically, the power to the electromagnetic clutch 221 is turned OFF, and the armature 222 and rotor 223 are made non-contact. As a result, the electromagnetic clutch 221 is disengaged, and the rotational power of the motor rotor 261 is not transmitted to the third bevel gear 224.

[0047] Furthermore, the control unit 230 fixes the motor case 263 to the bearing structure 240 using the fixing mechanism 250. Here, the power to the electromagnetic clutch of the fixing mechanism 250 is turned ON, and the armature 251 is pulled towards the motor case 263 to fix it in place.

[0048] In this case, the motor rotor 261 rotates, and consequently, the motor shaft 264 rotates. The first bevel gear 211 rotates in conjunction with the rotation of the motor shaft 264. As the first bevel gear 211 rotates, the second bevel gear 212 also rotates. Then, as the second bevel gear 212 rotates, the bearing structure 240 rotates around the azimuth axis 402, causing the antenna section 150 to rotate around the azimuth axis 402.

[0049] Here, as shown in Figure 3(a), if the rotation direction of the motor shaft 264 is in the direction of arrow 311, the first bevel gear 211 rotates in the direction of arrow 312, and the second bevel gear 212 rotates in the direction of arrow 313.

[0050] At this time, the third bevel gear 224 idles in conjunction with the rotation of the second bevel gear 212. In other words, it rotates in the direction of arrow 314. The armature 222 of the electromagnetic clutch 221 attached to the third bevel gear 224 also rotates in conjunction with the rotation of the third bevel gear 224. On the other hand, the rotor 223 of the electromagnetic clutch 221 rotates in conjunction with the rotation of the motor shaft 264, as it is linked to the rotation of the motor shaft 264.

[0051] Furthermore, since the motor case 263 is fixed to the bearing structure 240, the motor case 263 does not rotate due to the rotational reaction force of the motor rotor 261. In other words, the antenna section 150 does not rotate around the elevation axis 401. In this way, the azimuth angle adjustment of the antenna section 150 is achieved.

[0052] [When adjusting elevation angle] Figure 3(b) shows the operation of the two-axis drive mechanism 200 during elevation angle adjustment. Elevation angle adjustment is performed when the user issues an instruction to start elevation angle adjustment. In this figure, the area 292 enclosed by the dashed line is the part driven by the two-axis drive mechanism 200 during elevation angle adjustment (elevation angle adjustment drive area).

[0053] When adjusting the elevation angle, the control unit 230 switches the switching unit 220 to the elevation angle adjustment mode. Specifically, it turns on the power to the electromagnetic clutch 221 and brings the armature 222 and rotor 223 into contact. As a result, the electromagnetic clutch 221 becomes engaged, and the rotational power of the motor rotor 261 is transmitted to the third bevel gear 224.

[0054] Furthermore, the control unit 230 releases the motor case 263 from the bearing structure 240 using the fixing mechanism 250. Here, the power to the electromagnetic clutch of the fixing mechanism 250 is turned OFF, releasing the armature 251 from the motor case 263.

[0055] In this case, the motor shaft 264 rotates as the motor rotor 261 rotates. The first bevel gear 211 and the second bevel gear 212 also attempt to rotate. Meanwhile, the rotor 223 of the electromagnetic clutch 221 rotates in conjunction with the rotation of the motor shaft 264. And because the electromagnetic clutch 221 is engaged, the armature 222 and the third bevel gear 224 also rotate in response to the rotation of the rotor 223.

[0056] Here, as shown in Figure 3(b), if the rotation direction of the motor shaft 264 is in the direction of arrow 311, the first bevel gear 211 will attempt to rotate in the direction of arrow 312. On the other hand, as described above, the third bevel gear 224 will attempt to rotate in the direction of arrow 315. As shown in this figure, the rotation of the first bevel gear 211 and the third bevel gear 224 is in the same direction, so the rotation of the second bevel gear 212 is stopped. As a result, the rotation of the bearing structure 240 around the azimuth axis 402 is also stopped.

[0057] Furthermore, the rotation of the first bevel gear 211 also stops, and the rotation of the motor shaft 264 is also stopped, causing the motor shaft 264 to lock. On the other hand, since the motor case 263 is freed from the bearing structure 240, the motor case 263 itself rotates due to the rotational reaction force of the motor rotor 261, which continues to rotate (i.e., continues to generate rotational force). As a result, the antenna section 150 rotates around the elevation axis 401.

[0058] [Control processing by the control unit] Here, the control process flow by the control unit 230 will be explained. Figure 4 is a flowchart of the direction adjustment process of the antenna unit 150 by the control unit 230 of the two-axis drive mechanism 200 in this embodiment. This process starts when an instruction to start azimuth angle adjustment or elevation angle adjustment is received.

[0059] The control unit 230 determines whether the received adjustment instruction is an instruction to start azimuth angle adjustment (step S1101).

[0060] When the control unit 230 detects that an instruction to start azimuth angle adjustment has been received (S1101; Yes), it sets the state of the switching unit 220 and the fixing mechanism 250 (step S1102). Here, the power supply to the electromagnetic clutch 221 of the switching unit 220 is turned OFF, and the power supply to the electromagnetic clutch of the fixing mechanism 250 is turned ON.

[0061] Subsequently, the control unit 230 starts the motor rotor 261 (step S1103). That is, it supplies power to the motor unit 260.

[0062] As a result, the first bevel gear 211 and the second bevel gear 212 rotate, as described above. The motor case 263 is fixed to the bearing structure 240. Therefore, the antenna section 150 rotates around the azimuth axis 402.

[0063] The control unit 230 waits for a termination instruction from the user (step S1104). Upon receiving the termination instruction, it stops the rotation of the motor rotor 261, releases the settings of the switching unit 220 and the fixing mechanism 250 (step S1105), and terminates the process.

[0064] On the other hand, if it is determined in step S1101 that the instruction to start azimuth angle adjustment has not been received (S1101, No), the control unit 230 determines that the instruction to start elevation angle adjustment has been received.

[0065] Then, the control unit 230 sets the state of the switching unit 220 and the fixing mechanism 250 (step S1202). Here, the power supply to the electromagnetic clutch 221 of the switching unit 220 is turned ON, and the power supply to the electromagnetic clutch of the fixing mechanism 250 is turned OFF.

[0066] Then, the control unit 230 starts the motor rotor 261 (step S1203).

[0067] As a result, the second bevel gear 212 stops, and the motor case 263 is released from the bearing structure 240, as described above. Therefore, the antenna section 150 rotates around the elevation axis 401.

[0068] The control unit 230 waits for a termination instruction from the user (step S1204), and upon receiving the termination instruction, stops the motor rotor 261, releases the settings of the switching unit 220 and the fixing mechanism 250 (step S1205), and terminates the process.

[0069] As described above, the antenna device 100 of this embodiment has a simple configuration consisting of one motor installed in a motor case 263 that rotatably supports the antenna section 150, three gears, and a switching unit 220, enabling angle adjustment of the antenna section 150 in two directions: azimuth and elevation. Since the switching between both adjustment directions is performed by an electromagnetic clutch 221, the user can achieve these angle adjustments simply by indicating the desired adjustment direction.

[0070] In other words, in this embodiment, the antenna device 100 has a single component that serves multiple functions. For example, the motor case 263 also serves as the holding structure for the antenna section 150, and the support column 140 also serves as the holding structure for the second bevel gear 212. As a result, the number of components that transmit power can be minimized. Thus, in this embodiment, the antenna device 100 can simplify the multiple drive mechanisms and support structures necessary for adjusting the orientation of the antenna section 150. Therefore, it is not necessary to employ a complex mechanism with multiple components such as reducers and motors, and the weight can be reduced. Furthermore, manufacturing costs can be significantly reduced.

[0071] The antenna device 100 of this embodiment does not have a large structure compared to the drive mechanism of a conventional two-axis adjustable antenna device, thus reducing manufacturing costs and shortening the construction period from installation to commencement of operation. This reduces manufacturing and installation costs. Furthermore, since the performance adjustment and maintenance of the antenna device 100 are easy, operating costs can also be reduced. Moreover, since the performance adjustment and maintenance of the antenna device 100 can be performed even by inexperienced personnel, there is no need to train or secure specialists or skilled workers, thus reducing the burden on human resources.

[0072] In other words, according to this embodiment, an antenna device 100 that can be manufactured, installed, and operated at low cost can be provided.

[0073] If the antenna device 100 of this embodiment is applied to the antenna device of a bidirectional communication system, for example, it will be possible to quickly establish a bidirectional communication system in the event of an emergency or disaster, or until the system is restored.

[0074] <<Second Embodiment>> Next, a second embodiment of the present disclosure will be described. The general external configuration of the antenna device 100 of this embodiment is the same as that of the first embodiment shown in Figures 1(a) and 1(b). That is, the antenna device 100 of this embodiment, like the antenna device 100 of the first embodiment, includes a reflector 110, a radiating power supply unit 120, a support column 140, and a two-axis drive mechanism 200a.

[0075] Basically, configurations with the same name provide similar functions. However, the two-axis drive mechanism 200a differs from the two-axis drive mechanism 200 of the antenna device 100 in the first embodiment. The following description of the antenna device 100 of the second embodiment of this disclosure will focus on the differences from the first embodiment.

[0076] [2-axis drive mechanism] The two-axis drive mechanism 200a of the antenna device 100 in this embodiment, like the first embodiment, uses a single motor and directly utilizes the rotational drive of the motor to adjust the orientation of the antenna section 150 in both the azimuth and elevation directions.

[0077] An example of the two-axis drive mechanism 200a of the antenna device 100 of this embodiment is shown in Figure 5. As shown in this figure, the two-axis drive mechanism 200a comprises a conversion unit 210a, a control unit 230a, a bearing structure unit 240a, a fixing mechanism 250a, a motor unit 260, and a switching unit 270. The motor unit 260 is the same as in the first embodiment, so its description is omitted here.

[0078] The switching unit 270 controls the operation of the motor shaft 264 to switch between rotation around the elevation axis 401 and rotation around the azimuth axis 402. In this embodiment, an electromagnetic brake 271 is provided.

[0079] The electromagnetic brake 271 uses electromagnetic force to brake and hold rotational motion. In this embodiment, the electromagnetic brake 271 brakes the rotation of the motor shaft 264 when rotation around the elevation axis 401 is achieved.

[0080] The electromagnetic brake 271 comprises an armature 272 and a rotor 273. The armature 272 is mounted on a portion 241 of the bearing structure 240a in a manner that is not linked to the rotation of the motor shaft 264. The portion 241 is part of the bearing structure 240a and is located above the second bevel gear 212. The rotor 273 is mounted on the motor shaft 264 so as to rotate in conjunction with the rotation of the motor shaft 264.

[0081] The electromagnetic brake 271 is, for example, a non-excitation type brake. That is, when the power is ON (energized), the rotor 273 is released from the armature 272 and rotates freely. On the other hand, when the power is OFF (energized), the armature 272 engages with the rotor 273, and the rotation of the rotor 273 is braked. The motor shaft 264 is locked by the braking of the rotor 273's rotation.

[0082] The bearing structure 240a includes a portion that supports the motor case 263 so that it can rotate around the azimuth axis, and a portion 241 that supports the armature 272 of the electromagnetic brake 271. Similar to the first embodiment, the bearing structure 240a rotates in conjunction with the rotation of the second bevel gear 212, causing the motor case 263 and the antenna portion 150 fixed to the motor case 263 to rotate around the azimuth axis 402. The bearing structure 240a is hollow in the direction of the elevation axis 401.

[0083] The fixing mechanism 250a is a mechanism that fixes the motor case 263 to the bearing structure 240a when adjusting the azimuth angle. In this embodiment, it is implemented, for example, by an electromagnetic brake similar to that of the switching unit 270. Specifically, the fixing mechanism 250a has the same configuration as the switching unit 270, and when adjusting the azimuth angle, the power is turned OFF, the rotor and armature are engaged, and the rotation of the rotor is braked to fix the motor case 263 to the bearing structure 240a. When adjusting the elevation angle, the power is turned ON and the rotor is released from the armature, thereby releasing the motor case 263 from the bearing structure 240a.

[0084] The control unit 230a controls the operation of the entire antenna device 100 in this embodiment. In this embodiment as well, it controls the operation of the two-axis drive mechanism 200a according to instructions from the user. Specifically, it sends instruction signals to the switching unit 270, the fixing mechanism 250a, the motor unit 260, etc., and controls their operation.

[0085] In this embodiment, the control unit 230a receives an instruction to start azimuth angle adjustment, an instruction to start elevation angle adjustment, and an instruction to end elevation angle adjustment. The control unit 230a controls the operation of the switching unit 270 and the fixing mechanism 250a in accordance with the start instructions for azimuth angle adjustment and elevation angle adjustment, and then rotates the motor rotor 261.

[0086] Specifically, upon receiving an instruction to start azimuth angle adjustment, the control unit 230a turns on the electromagnetic brake 271 of the switching unit 270 and turns off the electromagnetic brake of the fixing mechanism 250a. In other words, it supplies power to the electromagnetic brake 271 and controls the supply of power to the electromagnetic brake of the fixing mechanism 250a to stop. Subsequently, it supplies power to the motor unit 260 and rotates the motor rotor 261.

[0087] Furthermore, when the control unit 230a receives an elevation angle adjustment instruction, it turns off the electromagnetic brake 271 of the switching unit 270 and turns on the electromagnetic brake of the fixing mechanism 250a. In other words, it controls the system to stop supplying power to the electromagnetic clutch 221 and to supply power to the electromagnetic brake of the fixing mechanism 250a. After that, it supplies power to the motor unit 260 and rotates the motor rotor 261.

[0088] On the other hand, upon receiving a termination instruction, the control unit 230a stops supplying power to the motor unit 260. Alternatively, the settings of the switching unit 270 and the fixing mechanism 250a may be released.

[0089] The antenna device 100 of this embodiment may also be equipped with a receiving device that receives instructions to start azimuth angle adjustment, elevation angle adjustment, and end of adjustment. The receiving device may be implemented as, for example, a button or a switch.

[0090] [Operation] The operation of the two-axis drive mechanism 200a of the antenna device 100 of this embodiment, which has the above configuration, during azimuth angle adjustment and elevation angle adjustment will be described below.

[0091] [When adjusting azimuth] Figure 6(a) shows the operation of the two-axis drive mechanism 200a during azimuth angle adjustment. Azimuth angle adjustment is performed when the user issues an instruction to start azimuth angle adjustment.

[0092] When adjusting the azimuth angle, the control unit 230a switches the switching unit 270 to the azimuth axis direction adjustment mode. Specifically, the power to the electromagnetic brake 271 is turned ON, and the armature 272 and rotor 273 are made non-contact. As a result, the armature 272 and rotor 273 operate separately and independently.

[0093] Furthermore, the control unit 230a fixes the motor case 263 to the bearing structure 240a using the fixing mechanism 250a. Here, the power to the electromagnetic brake of the fixing mechanism 250a is turned OFF, and the armature 251 is pulled towards the motor case 263 to fix it in place.

[0094] In this case, the motor rotor 261 rotates, and consequently, the motor shaft 264 rotates. The first bevel gear 211 rotates in conjunction with the rotation of the motor shaft 264. As the first bevel gear 211 rotates, the second bevel gear 212 also rotates. Then, as the second bevel gear 212 rotates, the bearing structure 240a rotates around the azimuth axis 402, causing the antenna section 150 to rotate around the azimuth axis 402.

[0095] At this time, the rotor 273 of the electromagnetic brake 271 rotates in conjunction with the motor shaft 264.

[0096] Furthermore, since the motor case 263 is fixed to the bearing structure 240a, the motor case 263 does not rotate due to the rotational reaction force of the motor rotor 261. In other words, the antenna section 150 does not rotate around the elevation axis 401.

[0097] [When adjusting elevation angle] Figure 6(b) shows the operation of the two-axis drive mechanism 200 during elevation angle adjustment. Elevation angle adjustment is performed when the user issues an instruction to start elevation angle adjustment.

[0098] When adjusting the elevation angle, the control unit 230a switches the switching unit 270 to the elevation angle adjustment mode. Specifically, it turns off the power to the electromagnetic brake 271 and engages the armature 272 with the rotor 273.

[0099] Furthermore, the control unit 230a releases the motor case 263 from the bearing structure 240a using the fixing mechanism 250a. Here, the release is achieved by turning on the power to the electromagnetic brake of the fixing mechanism 250a and separating the armature 251 from the motor case 263.

[0100] As a result of the above control, the armature 272 stops the rotation of the rotor 273. With the rotation of the rotor 273 stopped, the rotation of the motor shaft 264 is also stopped. In other words, the motor shaft 264 becomes locked. On the other hand, the motor case 263 is freed from the bearing structure 240a. Therefore, the motor case 263 itself rotates due to the rotational reaction force of the continuously rotating motor rotor 261. As a result, the antenna section 150 rotates around the elevation axis 401.

[0101] Furthermore, when the motor shaft 264 is locked, the rotation of the first bevel gear 211 also stops, and consequently, the rotation of the second bevel gear 212 also stops. This stops the rotation around the azimuth axis 402. Therefore, the antenna section 150 does not rotate around the azimuth axis 402.

[0102] The control processing flow by the control unit 230a in this embodiment is basically the same as in the first embodiment.

[0103] However, if an instruction to start azimuth angle adjustment is received, in step S1102, the power to the electromagnetic brake 271 of the switching unit 270 is turned ON, and the power to the electromagnetic brake of the fixing mechanism 250a is turned OFF. Also, if an instruction to start elevation angle adjustment is received, in step S1202, the power to the electromagnetic brake 271 of the switching unit 270 is turned OFF, and the power to the electromagnetic brake of the fixing mechanism 250a is turned ON.

[0104] As described above, the antenna device 100 of this embodiment has the same configuration as the first embodiment, and therefore the same effects as the first embodiment can be obtained. Furthermore, the antenna device 100 of this embodiment does not use the third bevel gear 224 compared to the first embodiment. Therefore, the number of components that transmit power can be further reduced. This makes it possible to further reduce weight, further reduce manufacturing costs, and shorten the construction period from installation to commencement of operation.

[0105] In other words, according to this embodiment, similar to the first embodiment, an antenna device 100 that can be manufactured, installed, and operated at low cost can be provided.

[0106] <Example 1> As the electromagnetic brake 271, an excitation-operated brake that engages when energized may be used. In this case, when adjusting the azimuth angle, the power to the electromagnetic brake 271 of the switching unit 270 is turned OFF, and the power to the electromagnetic brake of the fixing mechanism 250a is turned ON. Also, when adjusting the elevation angle, the power to the electromagnetic brake 271 of the switching unit 270 is turned ON, and the power to the electromagnetic brake of the fixing mechanism 250a is turned OFF.

[0107] Furthermore, in each of the above embodiments, the same mechanisms as the electromagnetic clutch and electromagnetic brake are used in the switching unit 270 and the fixing mechanisms 250 and 250a, respectively. However, the invention is not limited to this. For example, an electromagnetic clutch may be used in the switching unit 270 and an electromagnetic brake in the fixing mechanism 250 or 250a. Alternatively, an electromagnetic brake may be used in the switching unit 270 and an electromagnetic clutch in the fixing mechanism 250 or 250a.

[0108] <Modification 2> In the above embodiments and modifications, an electromagnetic clutch or electromagnetic brake is used for the fixing mechanisms 250 and 250a, respectively. However, the fixing mechanisms 250 and 250a are not limited to these. For example, a sliding stopper 252 may be used, as shown in Figures 7(a) and 7(b). Alternatively, a rotating stopper 255 may be used, as shown in Figures 7(c) and 7(d).

[0109] Figure 7(a) shows the configuration of the sliding stopper 252 during azimuth angle adjustment. As shown in this figure, the sliding stopper 252 is slidably attached to a stopper pin 253 provided on the bearing structure 240. During azimuth angle adjustment, the sliding stopper 252 is inserted into a pin bearing 254 provided on the motor case 263 side. This fixes the motor case 263 to the bearing structure 240.

[0110] On the other hand, when adjusting the elevation angle, as shown in Figure 7(b), the sliding stopper 252 is pulled out from the pin bearing 254 and inserted into an insertion hole provided in the bearing structure 240. This frees the motor case 263 from the bearing structure 240.

[0111] Furthermore, the rotary stopper 255 is attached to the bearing structure 240. When adjusting the azimuth angle, as shown in Figure 7(c), the end of the rotary stopper 255 opposite to the side attached to the bearing structure 240 is fixed to the stopper connection part 257 provided on the motor case 263. For example, it may be fixed with a bolt or the like. In this way, the motor case 263 is fixed to the bearing structure 240.

[0112] When adjusting the elevation angle, as shown in Figure 7(d), the rotary stopper 255 is removed from the stopper connection part 257 and fixed to the bearing structure part 240 side by the stopper clamp 256 attached to the bearing structure part 240. As a result, the motor case 263 is freed from the bearing structure part 240.

[0113] By using these configurations, the motor case 263 can be fixed in a simpler configuration.

[0114] Furthermore, as shown in Figure 8, a balancer 111 may be provided on the reflector 110 of the antenna section 150. In this case, the antenna section 150 can be fixed without the fixing mechanism 250 by adjusting the weight of the balancer 111.

[0115] <Variation 3> Furthermore, in the first embodiment described above, the motor shaft 264 is mounted in the order of the first bevel gear 211 and the switching unit 220 from the motor unit 260 side. However, the mounting order is not limited to this. For example, as shown in Figure 9, the switching unit 220 and the first bevel gear 211 may be mounted in that order.

[0116] In this case, the fixing mechanism 250 and the switching unit 220 may be configured as an integrated unit. This allows the control unit 230 to control the power supply (control signal) to the integrated unit during azimuth angle adjustment and elevation angle adjustment, enabling two-axis adjustment with simpler control.

[0117] In the first embodiment, when adjusting the azimuth angle, the power to the electromagnetic clutch 221 of the switching unit 220 is turned OFF, and the power to the electromagnetic clutch of the fixing mechanism 250 is turned ON. Similarly, when adjusting the elevation angle, the power to the electromagnetic clutch 221 of the switching unit 220 is turned ON, and the power to the electromagnetic clutch of the fixing mechanism 250 is turned OFF. Thus, the control of the switching unit 220 and the fixing mechanism 250 is reversed when adjusting each axial direction. For this reason, for example, a NOT circuit that inverts the input signal may be inserted before either the switching unit 220 or the fixing mechanism 250. In this case, if no current is supplied, the NOT circuit outputs the reverse signal, resulting in a signal to turn on the power to the output destination. With this configuration, it is possible to switch the drive shaft and fix the motor case 263 with a single control signal.

[0118] This modification is also applicable to the second embodiment.

[0119] <Modification 4> In each of the above embodiments, the control unit 230 or 230a stops driving the motor unit 260 when it receives a termination instruction from the user. However, stopping the motor unit 260 is not limited to this.

[0120] For example, the control unit 230 or 230a may be configured to monitor the signal strength from the radiant power supply unit 120 at predetermined time intervals and to stop the motor unit 260 when the signal strength changes from an increasing state to a decreasing state.

[0121] [Hardware configuration of the control unit] The control unit 230 or 230a in each of the above embodiments includes, for example, a CPU (Central Processing Unit) 191, a main memory 192, an auxiliary memory 193, and a signal input / output interface 194, as shown in Figure 10.

[0122] The CPU 191 implements the above functions, for example, by loading a program stored in the auxiliary storage device 193 into the main memory device 192 and executing it, and also comprehensively controls the entire device. Alternatively, one or more processors, such as an MPU (Micro Processing Unit), may be used instead of the CPU 191.

[0123] The main memory 192 is a type of memory such as RAM (Random Access Memory). The main memory 192 is the work area where the CPU 191 processes programs executed by the control units 230 and 230a.

[0124] The auxiliary storage device 193 is, for example, a ROM (Read Only Memory), an HDD (Hard Disk Drive), or an SSD (Solid State Drive). The auxiliary storage device 193 stores various programs executed by the control units 230 and 230a. The auxiliary storage device 193 may also include storage media such as a flexible disk, hard disk, optical disk, CD-ROM, CD-R, magnetic tape, non-volatile memory card, or DVD.

[0125] Furthermore, programs stored in the auxiliary storage device 193 can be provided as program products recorded on a non-temporary computer-readable recording medium. The auxiliary storage device 193 can be used to store various programs recorded on a non-temporary computer-readable recording medium for medium to long term.

[0126] The signal input / output interface 194 is an interface for inputting and outputting signals. In this embodiment, it receives signals such as an instruction to start or end azimuth or elevation angle adjustment, which are input by the user via a receiving device such as an externally provided button. In addition, it outputs control signals to the switching unit 220 (or switching unit 270) and the fixing mechanism 250 according to the received signals.

[0127] In addition, the system may be equipped with, for example, a communication interface, which may receive instructions from the user.

[0128] Furthermore, an expansion interface may be provided. For example, the received signal strength from the radiated power supply unit 120 may be output to an output device such as a display device connected to the expansion interface, so that the user can check it. The user can then determine the timing for completing the adjustment while monitoring the signal strength.

[0129] Furthermore, user instructions may be transmitted via input devices connected to the expansion interface.

[0130] Furthermore, the control units 230 and 230a may be implemented as external general-purpose information processing devices capable of communicating with the antenna device 100.

[0131] In the process flow described above, multiple steps (processes) are listed in order, but the execution order of each step is not restricted by that order. For example, the order of the illustrated steps can be changed to the extent that it does not affect the content, such as by executing each process in parallel.

[0132] While embodiments and modifications of this disclosure have been described above, this disclosure is not limited to the embodiments described above, and various modifications can be made that will be understood by those skilled in the art. Furthermore, each embodiment and modification can be combined with other embodiments as appropriate. In addition, for example, the network configurations and element configurations shown in each drawing are examples to aid in understanding this disclosure and are not limited to the configurations shown in these drawings.

[0133] Finally, we summarize the preferred forms of this disclosure. Some or all of the embodiments described above may also be described as follows, but are not limited to the following:

[0134] (Note 1) The two-axis drive mechanism of the antenna device is Motor and, A motor case is fixed to the antenna section and supported so as to be rotatable together with the antenna section around a first axis coaxial with the rotation axis of the motor, A bearing structure that supports the motor case so as to be rotatable around a second axis in a direction intersecting the first axis, A conversion unit that converts the rotation of the motor's rotating shaft into rotation around the second shaft, The system includes a switching unit that controls the movement of the motor's rotating shaft to switch between rotation around the first shaft and rotation around the second shaft. (Note 2) In the two-axis drive mechanism described in Appendix 1, The conversion unit is A first bevel gear rotates around the first shaft by the rotational power of the motor, Preferably, the system includes a second bevel gear that meshes with the first bevel gear and rotates around the second axis due to the rotational power around the first axis. (Note 3) In the two-axis drive mechanism described in Appendix 1 or 2, The aforementioned switching unit is The third bevel gear and Equipped with an electromagnetic clutch, The third bevel gear is positioned to rotate in conjunction with the rotation of the motor, thereby stopping the movement of the conversion unit and locking the rotation of the motor's rotating shaft. The aforementioned electromagnetic clutch is The system is switchable between a connected state in which the rotational power of the motor is transmitted to the third bevel gear, and a disconnected state in which the transmission of the rotational power of the motor to the third bevel gear is interrupted. When rotation around the first axis is achieved, it is preferable to switch to the connected state, and when rotation around the second axis is achieved, it is preferable to switch to the disconnected state. (Note 4) In the two-axis drive mechanism described in Appendix 1 or 2, The switching unit is equipped with an electromagnetic brake, When the electromagnetic brake achieves rotation around the first axis, it is preferable that it brakes the rotation of the motor's rotating shaft. (Note 5) In the two-axis drive mechanism described in any of the appendices 1 to 4, When rotating around the second shaft, it is preferable to further provide a fixing mechanism for fixing the motor case to the bearing structure. (Note 6) In the two-axis drive mechanism described in Appendix 5, The aforementioned fixing mechanism preferably includes an electromagnetic clutch or an electromagnetic brake. (Note 7) In the two-axis drive mechanism described in any of the appendices 1 to 6, It is preferable to further include a control unit that controls the operation of the switching unit. (Note 8) In the two-axis drive mechanism described in Appendix 7, Preferably, the control unit further starts and stops the motor according to the user's instructions. (Note 9) The antenna device is A two-axis drive mechanism as described in any of Appendix 1 to 8, The aforementioned antenna section, Equipped with a support column, The first axis is the elevation axis, The second axis is the azimuth axis, The aforementioned azimuth axis is coaxial with the central axis of the support column. (Note 10) The method for adjusting the orientation of the antenna portion by the control unit that controls the operation of the switching portion of the antenna device described in Appendix 9 is: The system accepts an instruction for either the rotation around the first axis or the rotation around the second axis, The switching unit is switched so that the antenna unit rotates in the adjustment direction that has been received. Start the aforementioned motor, Upon receiving the instruction that the adjustment is complete, the motor is stopped. (Note 11) In the two-axis drive mechanism described in Appendix 7, Preferably, the control unit monitors the output of the antenna and stops the motor in accordance with changes in the output level. Furthermore, the form described in Appendix 10 can be expanded into the forms described in Appendix 2-8 and 11, similar to Appendix 1.

[0135] Furthermore, the disclosures in the above-mentioned patent documents, etc., are incorporated into this document by reference. Within the framework of this disclosure (including the claims), further modifications and adjustments to the embodiments or variations are possible based on the fundamental technical concept. Also, within the framework of this disclosure, various combinations or selections of various disclosed elements (including each element of each claim, each element of each embodiment or variation, each element of each drawing, etc.) are possible. In other words, this disclosure includes the entire disclosure, including the claims, and of course, various modifications and changes that a person skilled in the art could make in accordance with the technical concept. In particular, with respect to the numerical ranges described in this document, any numerical value or sub-range included within that range should be interpreted as being specifically described unless otherwise stated. [Explanation of symbols]

[0136] 100: Antenna device, 110: Reflector, 111: Balancer, 120: Radiation feed unit, 140: Support column, 150: Antenna unit, 191: CPU, 192: Main memory, 193: Auxiliary memory, 194: Signal input / output interface, 200: 2-axis drive mechanism, 200a: 2-axis drive mechanism, 210: conversion unit, 210a: conversion unit, 211: first bevel gear, 212: second bevel gear, 220: switching unit, 221: electromagnetic clutch, 222: armature, 223: rotor, 224: third bevel gear, 230: control unit, 230a: control unit, 240: bearing structure unit, 240a: bearing structure unit, 241: part, 250: fixing mechanism, 250a: fixing mechanism, 251: armature, 2 52: Sliding stopper, 253: Stopper pin, 254: Pin bearing, 255: Rotating stopper, 256: Stopper clamp, 257: Stopper connection part, 260: Motor part, 261: Motor rotor, 262: Motor stator, 263: Motor case, 264: Motor shaft, 270: Switching part, 271: Electromagnetic brake, 272: Armature, 273: Rotor, 291: Drive range when adjusting azimuth angle, 292: Drive range when adjusting elevation angle 311: Arrow, 312: Arrow, 313: Arrow, 314: Arrow, 315: Arrow, 401: Elevation axis, 402: Azimuth axis

Claims

1. Motor and, A motor case is fixed to the antenna section and supported so as to be rotatable together with the antenna section around a first axis coaxial with the rotation axis of the motor, A bearing structure that supports the motor case so as to be rotatable around a second axis in a direction intersecting the first axis, A conversion unit that converts the rotation of the motor's rotating shaft into rotation around the second shaft, A two-axis drive mechanism for the antenna unit, comprising a switching unit that controls the movement of the motor's rotating shaft to switch between rotation around the first axis and rotation around the second axis.

2. A two-axis drive mechanism according to claim 1, The conversion unit is A first bevel gear rotates around the first shaft by the rotational power of the motor, A two-axis drive mechanism comprising: a second bevel gear that meshes with the first bevel gear and rotates around the second axis by rotational power around the first axis.

3. A two-axis drive mechanism according to claim 1, The aforementioned switching unit is The third bevel gear and Equipped with an electromagnetic clutch, The third bevel gear is positioned to rotate in conjunction with the rotation of the motor, thereby stopping the movement of the conversion unit and locking the rotation of the motor's rotating shaft. The aforementioned electromagnetic clutch is The system is switchable between a connected state in which the rotational power of the motor is transmitted to the third bevel gear, and a disconnected state in which the transmission of the rotational power of the motor to the third bevel gear is interrupted. A two-axis drive mechanism that can be switched to the connected state when rotation around the first axis is achieved, and to the disconnected state when rotation around the second axis is achieved.

4. A two-axis drive mechanism according to claim 1, The switching unit is equipped with an electromagnetic brake, The electromagnetic brake is a two-axis drive mechanism that brakes the rotation of the motor's rotating shaft when rotation around the first axis is achieved.

5. A two-axis drive mechanism according to claim 1, A two-axis drive mechanism further comprising a fixing mechanism for fixing the motor case to the bearing structure when rotating around the second axis.

6. A two-axis drive mechanism according to claim 5, The aforementioned fixing mechanism is a two-axis drive mechanism equipped with an electromagnetic clutch or an electromagnetic brake.

7. A two-axis drive mechanism according to claim 1, A two-axis drive mechanism further comprising a control unit that controls the operation of the switching unit.

8. A two-axis drive mechanism according to claim 7, The control unit further includes a two-axis drive mechanism that starts and stops the motors according to user instructions.

9. The two-axis drive mechanism according to claim 1, The aforementioned antenna section, Equipped with a support column, The first axis is the elevation axis, The second axis is the azimuth axis, An antenna device in which the azimuth axis is coaxial with the central axis of the support column.

10. Motor and, A motor case is fixed to the antenna section and supported so as to be rotatable together with the antenna section around a first axis coaxial with the rotation axis of the motor, A bearing structure that supports the motor case so as to be rotatable around a second axis intersecting the first axis, A conversion unit that converts the rotation of the motor's rotating shaft into rotation around the second shaft, A method for adjusting the orientation of an antenna in a two-axis drive mechanism comprising a switching unit that controls the operation of the motor's rotating shaft to switch between rotation around the first axis and rotation around the second axis, wherein the control unit controls the operation of the switching unit. The system accepts an instruction for either rotation around the first axis or rotation around the second axis, The switching unit is switched so that the antenna unit rotates in the adjustment direction that has been received. Start the aforementioned motor, A two-axis adjustment method that stops the motor when it receives a signal indicating that the adjustment is complete.

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