JPH0325962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a large-sized and highly accurate antenna device.

[Conventional technology]

In general, in large, high-precision antenna devices, compared to small and simple antenna devices, the mechanical configuration of the primary mirror panel that reflects radio waves and the primary mirror frame that holds this primary mirror panel must be set and maintained with high precision. It is necessary.

In addition, in a large antenna device, a primary mirror frame is constructed by combining unit frame materials into a predetermined frame structure, and a large number of unit panels are arranged on the surface of the primary mirror frame to constitute a primary mirror panel. This structure includes a secondary mirror panel that faces the panel and exchanges reflected radio waves.

[Problem to be solved by the invention]

Conventional devices are particularly susceptible to deformation due to the weight of the primary mirror panel and secondary mirror panel, where the primary mirror frame consists of a large number of unit panels, as well as local deformation due to local heating or cooling due to sunlight, wind, snow, etc. As a result, it has been difficult to maintain a highly accurate antenna device. [Means for Solving the Problems] The present invention was made to solve such problems, and the primary mirror frame may be locally deformed and the unit panel disposed thereon may be displaced from its predetermined position. The present invention aims to provide a novel antenna device that can maintain high accuracy by automatically returning a unit panel to its original position by the amount of deviation.

That is, in the antenna device according to the present invention, a plurality of panel adjusters are provided on a primary mirror frame configured in a predetermined shape, and a unit panel is attached to each panel adjuster to configure a primary mirror panel consisting of a large number of unit panels. At the same time, a panel mirror is provided on each panel adjuster protruding from the unit panel, and the laser beam emitted from the center of the primary mirror panel is reflected back to the panel mirror provided on the predetermined panel adjuster. By this, the amount of change from the preset unit panel position is calculated, and the motor provided in the panel adjuster is driven by the amount of change to return the predetermined unit panel to the preset position. .

[Effect]

The antenna device according to the present invention detects the displacement of the unit panel using laser light and performs calculation processing.
It is automatically corrected by the control device and drive means.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail using the drawings. FIG. 1 is a configuration diagram showing the configuration of the main parts of an antenna device according to the present invention. 1st
In the figure, reference numeral 1 denotes a primary mirror frame, which is constructed by combining a plurality of unit frame members to form a predetermined frame structure. Reference numeral 2 designates a unit panel disposed on the primary mirror frame 1. The primary mirror panel 3 is composed of a large number of unit panels, and a conductive surface 2 shown in FIG.
A is provided to reflect radio waves in a predetermined direction. This primary mirror panel 3 exchanges reflected radio waves with a secondary mirror section (not shown) placed opposite thereto. Reference numeral 4 designates a laser beam emitting receiver provided on a support base 5, and reference numeral 6 designates a number of panel mirrors provided in a panel adjuster 9, which will be described later, which are provided to protrude from the unit panel 2. Reference numeral 7 denotes an intermediate reflection mirror, which reflects the laser beam 8 from the laser beam emitting receiver 4 and guides it to the panel mirror 6 in a predetermined direction, and returns the laser beam 8 reflected by the panel mirror 6 to the laser beam emitting receiver 4. It is something to return.

FIG. 2 is a configuration diagram showing a structure related to a panel adjuster of an antenna device according to the present invention. Second
In the figure, 9 is a panel adjuster fixed to the primary mirror frame 1, and a motor unit 1 rotates by an electric signal.
0 and a gear part (not shown) for gearing down this rotation, and also has a vertical movement shaft 11 connected to this gear part and moved up and down by the rotation of the motor. Reference numeral 12 denotes a panel holding metal fitting, whose central portion is fixed to the vertically moving shaft 11, and support rods 14, 14 are attached to both ends thereof with panel mounting screws 13. And these support rods 14, 14
Unit panels 2, 2 are fixed to each as shown in FIG. Further, a panel mirror 6 is provided at the tip of the vertical movement shaft.

Next, FIG. 3 shows an overall structure for moving the unit panel 2 by the amount of displacement when the unit panel 2 is displaced from a predetermined position due to deformation of the primary mirror frame 1 in the antenna device according to the present invention. FIG.

In FIG. 3, reference numeral 15 denotes a calculation processing device in which reference information corresponding to each of a large number of panel mirrors 6 is set and stored. It includes information regarding the distance from to a predetermined panel mirror 2 and information regarding the rotation angle of the intermediate reflecting mirror 7 with respect to the predetermined panel mirror 6, and also inputs detection information obtained through measurement processing described later. Calculation processing is performed together with the distance information among the above reference information, and information corresponding to the amount of change of a predetermined panel mirror 6 from a preset position is output.

Reference numeral 16 denotes a control device, into which information regarding the rotation angle of the intermediate reflection mirror 7 with respect to a predetermined panel mirror 6 is inputted from the calculation processing device 15, and the motor 17 that drives the intermediate reflection mirror 7 is moved and fixed at a predetermined angle. The laser beam emitting/receiving device 4 is driven via the interface 18 to emit a laser beam. Laser light 8 emitted in this way
hits a predetermined panel mirror 6 via the intermediate reflecting mirror 7, and after being reflected returns to the laser beam emitting receiver 4 via the intermediate reflecting mirror 7, but at this time, the predetermined panel mirror 6 becomes misaligned. ,
If there is a change from the preset position,
Since the panel mirror 6 is a relatively small reflecting mirror, the laser light 8 emitted from the laser light emitting/receiving device 4 will not return with sufficient intensity if the panel mirror 6 is misaligned to a certain extent.

Therefore, the control device 16 rotates the intermediate reflection mirror 7 fixed to a predetermined panel mirror 6, and fixes it at a rotation position where the laser beam 8 returns to the laser beam emitting receiver 4 with sufficient intensity. During this time, the intermediate reflecting mirror 7 moves, detects detection information corresponding to the rotation angle, and outputs it to the calculation processing device 15.

Further, the control device 16 takes out information corresponding to the amount of change obtained by the calculation processing device 15 and outputs it to the motor section 10 for moving the unit panel 2. The information corresponding to this amount of change is, for example, a signal related to the time for driving the motor section 10.

With the above configuration, first, when the position information for a predetermined panel mirror 6 is input from the calculation processing device 15 to the control device 16, the intermediate reflecting mirror 7 is moved to a predetermined rotational position by the control device 16. After fixing, the laser beam emitting receiver 4 is excited to generate a laser beam.

The laser beam 8 is reflected by the intermediate reflecting mirror 7, and after being reflected by a predetermined panel mirror 6, returns to the laser beam emitting receiver 4 via the intermediate reflecting mirror 7 again. At this time, the laser light emitting receiver 4
When the returned laser beam is received at , it is determined that no change in the position of the predetermined panel mirror 6 has occurred, and the same process is then performed on another panel mirror 6.

However, if the laser beam returning from the predetermined panel mirror 6 to the laser beam emitting receiver 4 does not have sufficient intensity or does not return at all, the motor 17 is driven by the control device 16 to is rotated slightly to stop the intermediate reflecting mirror 7 at a position where the laser beam emitting receiver 4 receives the returned laser beam with sufficient intensity, and the calculation processing device calculates the detected information on the rotation angle of the intermediate reflecting mirror 7 during this time. Output to 15.

The calculation processing device 15 calculates the amount of change in the position of the predetermined panel mirror 6 from this detection information and the information regarding the distance from the intermediate reflecting mirror 7 to the predetermined panel mirror 6, and outputs this to the control device 16. The control device 16 corresponds to this position change amount,
For example, a time signal for driving the motor section 10 is supplied to the motor section 10 . The motor section 10 is the control device 1
It rotates in response to an electrical signal from 6, and the vertical movement axis 1
1 is moved up and down, the desired unit panel 2 is moved up and down, and the unit panel 2 is returned to the preset position for correction.

Note that whether to move the vertical movement shaft 11 upward or downward depends on whether it is rotated upward or downward when rotating the intermediate reflecting mirror 7 to receive the returning laser beam. It is determined by whether the

〔Effect of the invention〕

As described above, according to the present invention, heating of a large number of unit panels due to their own weight, sunlight, wind and snow, etc.
Due to the deformation of the primary mirror frame caused by cooling, changes from the preset positions of many unit panels are calculated by a calculation processing device based on laser light from the panel mirror installed in the panel adjuster. Since the panel adjuster is driven by the control device to move the unit panel attached to the panel adjuster to the set position, it is possible to obtain an antenna device with high precision at all times.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the main parts of an antenna device showing an embodiment of the present invention, FIG. 2 is a block diagram of a panel adjuster of the antenna device according to the present invention, and FIG.
The figure is an overall configuration diagram according to the present invention. In each figure, 1 is a primary mirror frame, 2 is a unit panel, 3 is a primary mirror panel, 4 is a laser beam emitting receiver, 5 is a support stand, 6 is a panel mirror, 7 is an intermediate reflection mirror, 8 is a laser beam, 9 is a panel adjuster, 1
0 is a motor section, 11 is a vertical movement shaft, 12 is a panel holding bracket, 13 is a panel mounting screw, 14 is a support rod, 15 is a calculation processing device, 16 is a control device, 17
is a motor, and 18 is an interface. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A primary mirror frame having a predetermined frame structure, a plurality of drive means provided on this primary mirror frame, drive shafts provided on each of these drive means and driven by the drive means, and each of these drive means. A unit panel that is attached to each drive shaft and is arranged in large numbers on the primary mirror frame to reflect radio waves, a panel mirror that protrudes from these unit panels and is provided on each of the drive shafts, and an incident laser beam. an intermediate reflecting mirror that reflects the laser beam, and control that causes the laser beam to be emitted to the intermediate reflecting mirror, detects reception of the returning laser beam from a predetermined panel mirror, outputs the detected information, and drives the driving means. means, and a calculation processing device that calculates the amount of change in the position of the predetermined panel mirror based on the information on the position to be set in advance for each of the panel mirrors and the detection information from the control device, and outputs it to the control device. An antenna device characterized in that the control means drives the drive means based on the amount of change in the position to correct each unit panel to a preset position.