JP6569443B2 - Radio wave propagation path visibility test apparatus and radio wave propagation path visibility test method - Google Patents

Description

  The present invention relates to a radio wave propagation path line-of-sight test apparatus and a radio wave propagation path line-of-sight test method applied to a line-of-sight test (mirror test) when a microwave radio line is newly established.

  When a microwave radio line is newly established, a line-of-sight test is performed to confirm whether there is no obstacle that shields radio waves between two opposing points and there is a line of sight. In this test, as shown in FIG. 4A, sunlight reflected at the first point is reflected by the mirror 100, the reflected light is directed to the second point, and reflected by the camera 200 at the second point. It is a test to confirm that there is a prospect by copying.

  In this test, workers are arranged at the first point and the second point, respectively, and the worker at the first point moves the mirror to reflect the sunlight to the second point, and reflects the reflected light to the first point. Toward the second point, the worker at the second point operates the camera to capture sunlight. When the camera captures sunlight, it is confirmed that there is a line of sight.

  Further, as this type of conventional technique, there is a technique described in Patent Document 1. According to this publication, a mirror for reflecting sunlight, a mirror automatic drive device that drives the mirror in at least two directions, a tripod that supports the mirror and the mirror automatic drive device, and a mirror automatic drive device are controlled. And a radio wave propagation path test system including a control device.

JP 60-160234 A

  By the way, in particular, in the summer, the line-of-sight test can be performed when the position of the sun is low, such as before sunset, to reduce the burden on workers. However, when the position of the sun is low, the incident angle to the mirror becomes shallow, and it is difficult to adjust the direction of the mirror so that the sunlight is reflected at the second point.

  In such a case, as shown in FIG. 4B, it is conceivable to reflect the sunlight to the second point while adjusting the respective directions using the two mirrors 110 and 120. However, adjusting the orientations of the two mirrors 110 and 120 requires matching the orientations of the mirrors 110 and 120, which is technically difficult.

  Further, when the position of the sun is low as in the severe winter season, the line-of-sight test is often performed using the two mirrors 110 and 120. However, at this time, since the worker performs a line-of-sight test in a cold environment, it is desirable that the adjustment of the orientations of the two mirrors can be completed in as short a time as possible.

  The present invention solves such problems, and when performing a line-of-sight test using two mirrors, a radio wave propagation path line-of-sight test apparatus that enables easy adjustment of the orientation of two mirrors It is another object of the present invention to provide a radio wave propagation path line-of-sight test method.

  In order to achieve the above object, the present invention comprises the following technique.

  (1) a first mirror that reflects light, a second mirror that is disposed above the first mirror and reflects reflected light from the first mirror in a predetermined direction, and the first mirror A mirror and a pedestal that supports the second mirror such that the angle can be changed, and the first mirror is provided with a mark that does not reflect light on a light reflecting surface, and the second mirror Is provided with an index for aligning a dark image portion corresponding to the mark in the reflected light of the first mirror.

  According to (1), the operator reflects the sunlight on the first mirror and adjusts the direction of the first mirror so that the light is directed to the second mirror. At this time, the direction of the first mirror is adjusted so that the dark image portion formed by the mark not reflected in the image reflected by the first mirror matches the index of the second mirror. Next, the direction of the second mirror is adjusted so that the sunlight reflected by the second mirror is directed to the target point while maintaining the state where the dark image portion and the index coincide with each other. By performing such an operation, it is possible to easily direct sunlight from the place where the radio wave propagation path line-of-sight test apparatus is located to the target point. As a result, the work related to the direction adjustment of the two mirrors can be facilitated and the working time can be shortened.

  (2) The radio wave propagation path line-of-sight test apparatus according to (1), wherein the index of the second mirror is formed in a frosted glass-like translucent shape.

  According to (2), since the index of the second mirror is frosted glass-like translucent, the operator moves down the second mirror as to whether or not the mark portion image matches the index. It is possible to check from above the second mirror as well as peep from. As a result, the operator can easily confirm the image of the mark portion.

  (3) A radio wave propagation path line-of-sight test method from the first point to the second point using the radio wave propagation path line-of-sight test apparatus according to (1) or (2), wherein the position of the sun at the first point And setting the direction of the first mirror and the second mirror roughly, taking into account the direction of the second point, and operating the first mirror, the dark image portion is Adjusting the direction to be displayed in the index area of the second mirror, and operating the second mirror to maintain the state where the dark image portion is displayed in the index area. However, after completing the direction adjustment so that the reflected light from the second mirror is directed to the second point, and after the direction adjustment of the second mirror is completed, the first mirror is operated, Performing a fine adjustment so that a dark image portion is displayed in the index region of the second mirror; At point, radio propagation forecasts testing method characterized by comprising the step of confirming the sunlight reflected from the first point, the.

  According to (3), the same effect as the radio wave propagation path line-of-sight test apparatus of (1) can be obtained.

  According to the present invention, when performing a line-of-sight test using two mirrors, it is possible to provide a radio wave propagation path line-of-sight test apparatus that makes it possible to easily adjust the orientation of two mirrors. Become.

1 is a perspective view illustrating a configuration of a radio wave propagation path line-of-sight test apparatus 1 according to an embodiment of the present invention. 3 is a plan view showing a mirror surface of the first mirror 10. FIG. 3 is a plan view showing a mirror surface of a second mirror 20. FIG. It is a figure which shows a prospect test.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the configuration of a radio wave propagation path line-of-sight test apparatus 1 according to an embodiment of the present invention. In the line-of-sight test, the radio wave propagation path line-of-sight test apparatus 1 and the camera 200 (see FIG. 4) are used. The radio wave propagation path line-of-sight test apparatus 1 is provided at a first point, and reflects sunlight toward a second point far from the first point. The radio wave propagation path line-of-sight test apparatus 1 includes a first mirror 10, a second mirror 20, and a gantry 30. The camera 200 (see FIG. 4) is provided at the second point.

The first mirror 10 has a mirror surface that directly receives and reflects sunlight.
The second mirror 20 includes a mirror surface that reflects the reflected light from the first mirror 10.
The gantry 30 includes a tripod portion 32, a first support portion 34 that supports the first mirror 10, and a second support portion 36 that supports the second mirror 20. The tripod portion 32 includes a base body 40 and three leg bodies 42, and the base end portions of the three leg bodies 42 are rotatably attached to the base body 40. When installing the tripod 32 on the ground, an operator rotates the three legs 42 to spread them obliquely from the base body 40, and then attaches the tips of the three legs 42 to the ground. Placed on. At this time, the tip portions of the three leg bodies 42 are arranged at three positions of an equilateral triangle on the ground.

The first support portion 34 is configured by a support body 34a having a base end portion fixed to the base body 40 and extending downward, and a free pan head 34b fixed to a distal end portion of the support body 34a.
The second support portion 36 is configured by a support body 36a having a base end fixed to the base body 40 and extending upward, and a free pan head 36b fixed to the distal end of the support body 36a.

  Then, the radio wave propagation path line-of-sight test apparatus 1 is assembled by fixing the first mirror 10 to the free camera platform 34b and fixing the second mirror 20 to the free camera platform 36b. When the radio wave propagation path line-of-sight test apparatus 1 is installed on the ground, the second mirror 20 is located above the first mirror 10. The angle of the first mirror 10 and the second mirror 20 can be changed in an arbitrary direction by the free heads 34b and 36b.

  FIG. 2 is a plan view showing a mirror surface of the first mirror 10. In the center of the mirror surface of the first mirror 10, a cross-shaped mark 10a is provided. Light is not reflected in the region of the mark 10a. Therefore, if sunlight is reflected by the first mirror 10 and the reflected light is irradiated onto the screen, for example, an image having a dark cross-shaped pattern in the center corresponding to the mark 10a is formed on the screen. Is done.

  FIG. 3 is a plan view showing a mirror surface of the second mirror 20. In the center of the mirror surface of the second mirror 20, a circular index 20a is provided. The area | region of this parameter | index 20a is formed in the shape of frosted glass, and has translucency. Further, a part of the light incident on the indicator 20 a is emitted from the back surface side of the second mirror 20.

  Since the area | region of the parameter | index 20a is frosted glass shape, when the mirror surface of the 2nd mirror 20 receives the reflected light of the sunlight from the 1st mirror 10, the cross shape corresponding to the mark 10a of the 1st mirror 10 Can be displayed in the area of the index 20a. In addition, a cross-shaped pattern can be recognized from the back side of the index 20a on the mirror surface of the second mirror 20 as well. According to the present embodiment, the index 20a has a diameter of about 2 to 3 cm and is relatively small compared to the size of the mirror surface. Therefore, the influence on the reflected light is small, and the test can be appropriately performed as shown. is there.

Next, the procedure of the line-of-sight test using the radio wave propagation path line-of-sight test apparatus 1 of the present embodiment will be described.
The radio wave propagation path line-of-sight test apparatus 1 and a worker are arranged at one point (first point) of two points where a microwave radio line is scheduled to be newly established. An operator who operates the camera 200 (see FIG. 4) is arranged at the other point (second point).

  First, the worker at the first point roughly sets the directions of the first mirror 10 and the second mirror 20 while considering the position of the sun and the direction of the second point.

  Next, the operator operates the first mirror 10 to adjust the direction so that a cross-shaped pattern corresponding to the mark 10 a is displayed in the area of the index 20 a of the second mirror 20.

  Next, the operator operates the second mirror 20 to reflect the second mirror 20 while maintaining a state in which the cross-shaped pattern is displayed in the area of the index 20a of the second mirror 20. The direction is adjusted so that the light is directed to the second point.

  After the direction adjustment of the second mirror 20 is completed, the worker operates the first mirror 10 to display a cross-shaped pattern corresponding to the mark 10a in the area of the index 20a of the second mirror 20. Make fine adjustments. That is, since the display position of the cross-shaped pattern in the area of the index 20a is shifted with the movement of the sun, an operation for adjusting the shift is performed. This makes it possible to maintain the reflected light traveling toward the second point so as to pass through a certain optical path.

  Then, when the worker at the second point can confirm the sunlight sent from the first point, the worker takes a picture of the state where the first point is shining with the camera 200 (see FIG. 4). . This completes the outlook test.

  According to the present embodiment configured as described above, the optical path connecting the sun, the first mirror 10, the second mirror 20, and the target point (second point) can be easily performed when performing the line-of-sight test. It becomes possible to make the optical path, and the optical path can be easily maintained. This makes it possible for one worker to easily adjust the two mirrors with high difficulty. Furthermore, the time required for the line-of-sight test can be shortened, and the burden on the worker can be reduced. In addition, by adjusting the optical path once to the target point, thereafter, even if the sun moves with time, the direction can be easily adjusted by operating only the first mirror 10. In addition, since a power source or the like is unnecessary and lightweight, it is possible to reduce the work load even when working in the mountains.

  In addition, according to the present embodiment, since the index 20a of the second mirror 20 is polished glass-like translucent, the worker not only looks into the second mirror 20 from below, but also looks at the cross-shaped image. It becomes possible to confirm from above the second mirror 20. As a result, the operator can easily confirm the cross-shaped image.

  As mentioned above, although embodiment of this invention was described, embodiment of this invention is not restricted to embodiment mentioned above. For example, according to the above-described embodiment, the mark 10a is formed in a cross shape, but is not limited thereto, and may be a simple point, for example. Further, according to the above-described embodiment, the index 20a is formed in a polished glass shape. However, if a cross-shaped pattern corresponding to the mark 10a is displayed on the index 20a, the index 20a is in a polished glass shape. It does not have to be. For example, the angle may be adjusted by attaching a mark for aligning the mark 10a on the mirror surface of the second mirror 20 and aligning the mark with the mark.

DESCRIPTION OF SYMBOLS 1 Radio wave propagation path line-of-sight test apparatus 10 1st mirror 10a Mark 20 Second mirror 20a Index 30 Mount 32 Tripod 34 First support 34a Support 34b Free pan 36 Second support 36a Support 36b Free pan 40 Base body 42 Leg body 100, 110, 120 Mirror 200 Camera

Claims (3)

A first mirror that reflects light;
A second mirror disposed above the first mirror and reflecting the reflected light from the first mirror in a predetermined direction;
A pedestal that supports the first mirror and the second mirror such that the angle can be changed, respectively.
The first mirror is provided with a mark that does not reflect light on a light reflecting surface,
The radio wave propagation path line-of-sight test apparatus, wherein the second mirror is provided with an index for matching a dark image portion corresponding to the mark in the reflected light of the first mirror.   The radio wave propagation path line-of-sight test apparatus according to claim 1, wherein the index of the second mirror is formed in a frosted glass-like translucent shape. A radio wave propagation path line-of-sight test method from the first point to the second point using the radio wave propagation path line-of-sight test apparatus according to claim 1,
Roughly setting the direction of the first mirror and the second mirror while taking into account the position of the sun and the direction of the second point at the first point;
Manipulating the first mirror to adjust the direction so that the dark image portion is displayed in the indicator area of the second mirror;
Operate the second mirror to adjust the direction so that the reflected light from the second mirror goes to the second point while maintaining the state where the dark image portion is displayed in the indicator area. A process of performing;
Fine adjustment so that the dark image portion is displayed in the index region of the second mirror by operating the first mirror after the direction adjustment of the second mirror is completed; ,
And a step of confirming sunlight reflected from the first point at the second point.

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