JPH0336321B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an installation meter used to determine the elevation angle of an antenna when installing an antenna for directly receiving radio waves from a broadcasting stationary satellite.

Configuration of conventional example and its problems Conventionally, this type of installed meter is called a pointing meter. 1a, b and 2 a, b show this conventional pointing meter. A pointer 1 and a map 2 are present on the surface of the pointing meter, and on the outer circle of the map 2, the elevation angle of the satellite is multiplied by a gear ratio n=Z ₂ /Z ₁ and is scaled at equal intervals. As shown in the principle diagrams in Figures 2a and 2b, the pointer 1 is attached to the rotating shaft of a gear 5 which is meshed with a gear 4 at an appropriate gear ratio, which is subjected to an uneven load by a weight 3. . The rotating shafts of both gears 4 and 5 are both mounted at appropriate locations on the map board. Now, as shown in Figure 2a, if the reference plane A is erected almost perpendicular to the ground, the unbalanced load gear 4 will be set so that the unbalanced load point is always directly below the rotation axis due to the action of gravity. is set. Even if the reference plane A is rotated in the vertical plane to reach the state shown in Fig. 2b, the set state of the unbalanced load gear 4 does not change, so the pointer 1 changes the gear ratio n=Z to the rotation angle θ of the map board. ₂ /Z Angle multiplied by ₁
Rotate by nθ. Therefore, if this pointing meter is attached to an appropriate location on the antenna, the amount of change in the antenna elevation angle can be detected as a value multiplied by the gear ratio based on the rotation angle nθ of the pointer.

When installing an antenna to receive radio waves from a broadcasting satellite, align the reference plane of the pointing meter with the direction of the antenna. The instructions are drawn so that a straight line drawn in the radial direction from the axis of rotation of the pointer is a contour line that exactly looks at the satellite. Further, the elevation angle step (change amount) on the map is equal to the actual angle step multiplied by the aforementioned gear ratio.

In this way, the amount of change in the rotation angle of the pointer due to the rotation of the antenna will be exactly equal to the amount of change in the elevation angle on the map. If you use this property in reverse (by properly setting the pointer initially) and set the antenna elevation angle so that the pointer points to the antenna installation point on the map, the pointing direction of the antenna will exactly match the direction of the satellite. You can make it happen.

The above is the principle of pointing meter,
The elevation angle can be set simply by attaching this installation meter to the antenna and setting the pointer so that it points to the antenna installation point on the map.

However, in such a conventional configuration, since the meshing gears 4 and 5 are rotated only by the weight 3, backlash occurs, and if the backlash caused by this backlash is tried to be eliminated, the rotational resistance increases, causing an uneven load. This has the disadvantage that the point will not be directly under the rotation axis, resulting in an error.

OBJECTS OF THE INVENTION An object of the present invention is to provide an antenna installation meter that can accurately and easily install an antenna at a predetermined elevation angle.

Structure of the Invention The antenna installation meter of the present invention has two sides that intersect at right angles as installation reference planes, a rotating part having an elevation angle scale of the installed antenna between the two sides, and a rotating part that rotates the rotating part. a base that is movably attached; a pointer that rotates in conjunction with the rotation of the rotating part relative to the base to indicate an elevation scale; and a pointer that is rotatably attached to the base and indicates the verticality of the installed antenna. It is characterized by having a pendulum.

DESCRIPTION OF EMBODIMENTS Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figures 3a, b and 4 show an antenna-mounted meter according to the invention. In FIG. 4, scale plates, gears, etc. are omitted for ease of understanding. Reference numeral 6 denotes a rotating section, which is fan-shaped, the two sides serving as the reference plane A intersect at right angles, and a horizontal shaft 8 fixed to the base 7.
is rotatably pivoted around the Rotating part 6
A gear 9 is fixed to the base body 7, and a rotating shaft 11 of a gear 10 that meshes with the gear 9 is fixed to the base body 7. The gear 12 is integral with the gear 10 and rotates at the same time by the same angle. Gear 13 meshing with gear 12
rotates around the horizontal axis 8, and the pointer 1 is attached to the gear 13.
4 is fixed. Gears 9, 10, 12, 13
Let the number of teeth be Z ₉ , Z ₁₀ , Z ₁₂ , Z ₁₃ respectively,
If the rotating portion 6 is rotated by θ with respect to the base body 7, the pointer 14 will rotate by θ·Z ₉ /Z ₁₀ ·Z ₁₂ /Z ₁₃ . Reference numeral 15 denotes a scale plate, which is integrated with the rotating part 6 and has a scale 16 on the edge of the fan shape. Worm wheel teeth 17 are formed on the outer periphery of the rotating portion 6, and the lower shaft end of the worm 18 that engages with these teeth is rotatably and tiltably attached to the lower part of the base body 7. A long hole 19 is bored in the upper part of the base body 7, and the upper end of the shaft of the worm 18 fits into this long hole 1.
A knob 20 is attached through the hole 9. The leaf spring 21 is attached to the base body 7 and always urges the worm 18 in the right direction in FIG. 3, that is, in the direction in which it engages with the worm wheel teeth 17. 2
A pendulum 2 is rotatably attached to the base 7 at its upper end, and a scale 24 indicating the verticality of the pendulum 22 is attached to a scale plate 23 at the tip of the pendulum 22.

The scale 16 of the scale plate 15 has a shape in which, when the pendulum 22 points to the center of the scale 24, the angle between the pendulum 22 and the reference plane is multiplied by (Z ₉ /Z ₁₀・Z ₁₂ /Z ₁₃ ). It is marked with.

Examples of use are shown in FIGS. 5 and 6. First, the pointer 14 is set to match the scale 16 to an elevation angle determined by the location where the antenna is installed. At this time, the rotating part 6
To rotate the worm wheel teeth 17 and worm 18, pull the knob 20 to the left in FIG.
The rotating part 6
After rotating (coarse adjustment), turn knob 20.
is returned to its original position, the worm wheel teeth 17 and the worm 18 are engaged with each other, and then the knob 20 is rotated to make fine adjustments so that the pointer 14 indicates a predetermined angle. The preset installed meter is placed on the reference plane indicating the directivity direction of the antenna 25 as shown in FIG. 5, or on the reference plane perpendicular to the directivity direction of the antenna 25 as shown in FIG. One reference plane is aligned and fixed, and the elevation angle of the antenna 25 body is adjusted and installed so that the pendulum 22 points vertically.

In the above embodiment, a gear system including gears 9, 10, 12, and 13 was used as an example of the rotating drive means for the pointer 14, but this may also be configured as a link system.

Effects of the Invention As explained above, according to the antenna installation meter of the present invention, the installation elevation angle is set in advance and the elevation angle of the antenna is adjusted so that the vertical inclination of the base body becomes a predetermined angle. The antenna can be easily and accurately installed at a desired elevation angle without causing installation errors due to backlash unlike a tilting meter.

[Brief explanation of drawings]

Figures 1a and b are external views of a conventional pointing meter, Figures 2a and b are diagrams of the operating principle of Figure 1, and Figures 3a and b are an embodiment of the antenna-installed meter according to the present invention. FIG. 4 is an exploded perspective view of the main part of FIG. 3, and FIGS. 5 and 6 are explanatory views of the antenna-installed meter in use. 6... Rotating part, 7... Base body, 8... Horizontal axis,
9, 10, 12, 13...gear, 14...pointer,
15, 23...Scale plate, 16,24...Scale, 1
7... Worm wheel tooth, 18... Worm,
21...plate spring, 22...pendulum.

Claims (1)

[Claims] 1. Two sides intersecting at right angles are provided as installation reference planes,
A rotating part on which an elevation angle scale of the installation antenna is provided between two sides of the rotating part, a base body to which this rotating part is rotatably attached, and a rotating part that moves in conjunction with the relative rotation of the rotating part with respect to the base body. An antenna installation meter comprising: a pointer that rotates to indicate an elevation scale; and a pendulum that is rotatably attached to the base and indicates the verticality of the installed antenna. 2. Claim No. 2 characterized in that a gear system or a link system is provided as a rotation transmission means between the rotation part and the base body, and the rotation angle between the two is expanded and transmitted to the pointer. Antenna installation meter described in Section 1.