JPH0563433A - Antenna supporting device - Google Patents

Abstract

PURPOSE:To perform the elevation angle and bearing of a parabola antenna with a simple mechanism by enabling the scan of a plurarity of communication satellites. CONSTITUTION:In the case the distance between a horizontal axis 5 of a first indication part 2 and an axis 8 of a second indication part 3 shall be L1 and the distance between the rotation center (rotary shaft of a motor 10) of a bearing adjustment member 11 and the connection part for a supporting axis 6, that is, a foot part 12 shall be L2, the L1:L2 1:6.6 is satisfied. Thus, even when a supporting shaft 6 is rotated in the vertical surface around a shaft 5 to adjust the elevation angle and the azimuth is adjusted by rotating the azimuth adjustment member 11 around the rotary shaft of the motor 10, the L1 and L2 maintain the relationship, resulting in accurate scanning after temporarily taking a satellite position P.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna supporting device suitable for supporting a parabolic antenna, and more particularly to an antenna supporting device for easily tracking a communication satellite.

[0002]

2. Description of the Related Art The original parabolic antenna support device had a fixed elevation angle and azimuth angle, or a structure in which only the azimuth angle could be adjusted.
There was a disadvantage that the two parabolic antennas could not be received, or the antennas could not be accurately aimed at the satellites above the equator.

Therefore, a supporting device capable of adjusting both the elevation angle and the azimuth angle as shown in FIG. 5 has recently been used. This antenna support device is provided with a post 100 at the upper end of the post 100 that stands vertically on the ground or a building.
A fixed shaft 101 parallel to the fixed shaft 101 is rotatably mounted, a gear 102 externally fitted to the fixed shaft 101 and a gear 103 rotated by a motor are meshed with each other, and a parabolic antenna 104 is provided with a bracket at the upper end of the fixed shaft 101. The tip of the rod 105a of the cylinder unit 105 attached to the fixed shaft 101 is attached to the lower portion of the parabolic antenna 104 while being attached so as to be rotatable up and down.

Then, the fixed shaft 101 is rotated by driving a motor to adjust the azimuth angle of the parabolic antenna 104, and the cylinder unit 105 is extended / contracted to adjust the elevation angle to track the communication satellite, that is, the parabolic antenna 104. To the communication satellite and receive the radio waves output by the communication satellite.

[0005]

However, in the above-mentioned conventional antenna support device, the fixed shaft 101 (motor) and the cylinder unit 105 are operated independently to direct the parabolic antenna 104 to the communication satellite. Therefore, the azimuth angle and the elevation angle must be adjusted, and the work is complicated and it is difficult to direct the parabolic antenna to the communication satellite.

[0006]

In order to solve the above problems, an antenna supporting apparatus according to the present invention is provided with a first and a second supporting portions on a vertically standing base body, and the first supporting portion has a tip end. An intermediate portion of the support shaft having the parabolic antenna mounted thereon is rotatably supported in a vertical plane, and an elevation angle adjusting member is rotatably supported in a vertical plane on the second supporting portion, and the azimuth is adjusted to the elevation angle adjusting member. The tip end of the adjusting member is rotatably attached, and the base end of the azimuth adjusting member and the base end of the support shaft are rotatably and slidably connected to each other, and further, the first indicating portion and the second indicating portion of the base body. The distance L2 between the rotation center of the azimuth adjusting member and the connecting portion with respect to the support shaft is set to be about 6.6 times the distance L1 between the portion and the portion.

[0007]

In FIGS. 3 and 4, E is the earth, O is the center of the earth, A is the observation point, M is the satellite orbit, P is the point on the satellite orbit, and O'is an arbitrary point extending vertically at point A. Point of
M'is an orbit parallel to the orbit M passing through the point O ', P'is a line segment P
The intersection of the extension line of A and the orbit M'is the triangle OAP
And the triangle O'AP 'are always similar regardless of the position (latitude) of the point A.

On the other hand, the satellite orbit M is a circle about 35,800 km above the equator (earth surface), and the triangle OAP is the circle M.
, A cone with A as a vertex (correctly a truncated cone), a triangle O'AP 'forms a circle with M'as a lead, and A as a vertex (correctly a truncated cone), and these cones are similar. Have a relationship. Then, in this similarity relationship, if the point P and the point P'are located at the positions where the circle M and the circle M'as conductors face each other, P-
AP 'becomes a straight line. This means that if the point P'on the circle M'is determined, the point P, that is, the satellite is always on the extension of the line segment P'A.

Here, the line segment OP is about 42,180 km, which is 35,800 km plus the radius of the earth about 6,380 km.
Since the line segment OA has a radius of the earth of about 6,380 km, the relationship of OA: OP = O′A: O′P≈1: 6.6 holds. That is, no matter where the points A and P are located, the ratio between the line segment OA and the line segment OP in the triangle OAP is always 1: 6.6. By manufacturing a skeletal support device that can always maintain the relationship of 1: 6.6, it is possible to accurately track an arbitrary communication satellite.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a side view of an antenna supporting device according to the present invention, and FIG. 2 is a perspective view of a main part of the antenna supporting device. The antenna supporting device is firstly mounted on a vertically standing base body 1.
And the second supporting portions 2 and 3 are provided.

As shown in FIG. 2, a horizontal shaft 5 is rotatably installed on the first support portion 2 in a frame body 4, and an intermediate portion of the support shaft 6 is fixed to the horizontal shaft 5 to support the same. The parabolic antenna 7 is attached to the tip of the shaft 6, and the elevation angle of the parabolic antenna 7 is changed by rotating the support shaft 6 in a vertical plane.

An elevation angle adjusting member 9 is rotatably supported on the second supporting portion 3 via a shaft 8 in a vertical plane, and a motor 10 is fixedly mounted on the elevation angle adjusting member 9 to rotate the motor 10. The shaft is connected to the tip of the plate-shaped azimuth adjusting member 11.

A leg portion 12 is provided at the base end portion of the azimuth adjusting member 11, and a frame 13 is attached to the lower end of the leg portion 12,
A horizontal shaft 14 is rotatably installed in the frame body 13, and a base end portion of the support shaft 6 is slidably inserted into a bearing 15 fixed to the horizontal shaft 14. The structure of the bearing is not limited to the above, and a spherical bearing or the like may be adopted.

In the above structure, the distance between the horizontal shaft 5 of the first indicator 2 and the shaft 8 of the second indicator 3 is L1, and the center of rotation of the azimuth adjusting member 11 (motor 1
0 rotation axis) and the support shaft 6 are connected to each other, that is, the legs 12
When the distance between L1 and L2 is L2, L1: L2≈1: 6.
It is set to be 6.

Here, by setting so that L1: L2≈1: 6.6, the indicating sections 2 and 3 and the azimuth adjusting member 1 are set.
The triangle formed by 1 is the triangle O'A shown in FIG.
It becomes similar to P '. That is, the center of the axis 8 is at the point O ',
The center of the shaft 5 corresponds to the point A and the center of the shaft 14 corresponds to the point P ', and the azimuth angle is adjusted even if the support shaft 6 is rotated in the vertical plane about the shaft 5 to adjust the elevation angle. Even if the member 11 is rotated about the rotation axis of the motor 10 to adjust the azimuth angle, L1 and L2 maintain the above relationship, so that the position P of the satellite should be accurately tracked. You can

[0016]

As described above, according to the antenna supporting apparatus of the present invention, the antenna can be accurately directed to any satellite among a plurality of satellites with a simple structure, and one member is provided. Since it also has the function of adjusting the elevation angle and azimuth of the antenna, the number of parts is also reduced.

[Brief description of drawings]

FIG. 1 is a side view of an antenna support device according to the present invention.

FIG. 2 is a perspective view of a main part of the antenna support device.

FIG. 3 is a diagram for explaining the principle of the present invention two-dimensionally.

FIG. 4 is a diagram for three-dimensionally explaining the principle of the present invention.

FIG. 5 is a diagram showing a structure of a conventional antenna support device.

[Explanation of symbols]

1 ... Base, 2 ... 1st support part, 3 ... 2nd support part, 5,
8, 14 ... Horizontal axis, 6 ... Support axis, 7 ... Parabolic antenna, 9 ... Elevation angle adjusting member, 10 ... Motor, 11 ... Direction adjusting member, L1 ... Between first indicator and second indicator Distance, L2 ... Distance between the rotation center of the azimuth adjusting member and the connecting portion with respect to the support shaft.

Claims (2)

[Claims] 1. A vertically erected base body is provided with first and second support portions, and the first support portion has an intermediate portion of a support shaft having a parabola antenna attached to a tip end thereof to be rotatable in a vertical plane. In the vertical direction, the elevation angle adjusting member is rotatably supported on the second support portion, and the tip of the azimuth adjusting member is rotatably attached to the elevation angle adjusting member. The base end of the support shaft is rotatably and slidably connected, and further, the distance between the first indicating portion and the second indicating portion of the base is L1, and the rotation center of the azimuth adjusting member is supported. The antenna supporting device is characterized in that when the distance between the shaft and the connecting portion is L2, these are set to the following ratios. L1: L2≈1: 6.6 2. The antenna support device according to claim 1, wherein the elevation angle adjusting member is provided with a drive means for integrally rotating the elevation angle adjusting member and the support shaft.