JP2015144360A - Testing system for propagation path prospect and testing method for propagation path prospect - Google Patents

Abstract

PROBLEM TO BE SOLVED: To test easily prospect of a propagation path between a first point and a second point.SOLUTION: A first device 2 arranged at an A point comprises: a GPS21 that acquires positional information including a latitude Xa, a longitude Ya and an altitude at the A point; a facing portion positional information acquisition task 33 that acquires positional information including a latitude Xb, a longitude Yb and an altitude at a B point; a mirror 22 that reflects sunlight toward a mirror 220 of the facing portion arranged at the B point; a sunlight position calculation task 32 that acquires a position of sunlight at the A point; and a mirror adjustment task 34 that makes adjustment on the basis of the positional information acquired by the GPS 21, the positional information of the facing portion acquired by the facing portion positional information acquisition task 33 and the position of the sunlight at the A point calculated by the sunlight position calculation task 32 so that the sunlight is reflected on the mirror 220 of the facing portion.

Description

  The present invention relates to a propagation path line-of-sight test system and a propagation path line-of-sight test method for testing the propagation path line-of-sight between a first point and a second point.

  For example, when a microwave radio communication line is newly established, an antenna is installed with a first point and a second point that are mutually visible as relay points. Long distance transmission is possible by installing a large number of such relay points and repeating the relay.

  As a method of testing whether there is mutual line of sight at the relay point, there is a method of determining whether the line of sight is good or not by installing a mirror at the relay point and reflecting sunlight to check the reflected light. is there. Specifically, a mirror is installed at the first point, and the elevation angle (vertical angle) and direction are adjusted so that sunlight is reflected toward the second point. At the second point, the elevation angle and direction of the mirror are adjusted so that the reflected light from the first point is reflected again toward the first point. Then, at the first point, the reflected light (light spot) reflected on the mirror at the second point is confirmed. In such a method, it is necessary to place an operator at each of the first point and the second point, and it is also necessary for the worker to manually adjust the mirrors arranged at the respective points. The distance of the relay point may be several tens of kilometers, and it is very difficult for the operator to manually adjust the mirror.

  Therefore, a technique relating to a radio wave propagation path test system provided with an automatic mirror driving device used for an inter-station line-of-sight test of a microwave communication line is known. (For example, refer to Patent Document 1). This technology controls the mirror so that the reflected light is directed in a predetermined direction and periodically takes a predetermined range from the direction so that the reflected light of the mirror is uniformly radiated to the opposite station. It is to make. In addition, a technique related to a line-of-sight measurement device that facilitates measurement of a line-of-sight blocking state between two distant points and enables detailed measurement and recording of the line-of-sight blocking state is known. (For example, refer to Patent Document 2). In this technology, an observed part having an observed object illuminated by an illumination device is installed at one of two points to be measured, and the observed object is placed by a telephoto lens-equipped television camera of the measuring part installed at the other. It is something to shoot.

JP 60-160234 A JP 2003-121153 A

  However, although the technique described in Patent Document 1 allows the reflected light of the mirror to irradiate the opposite station uniformly, it is necessary for the operator to install the mirror in the direction of the opposite station. It was. Moreover, since the position of the sun changes with time, it is necessary to reset the position of the mirror each time.

  Accordingly, an object of the present invention is to provide a propagation path line-of-sight test system and a propagation path line-of-sight test method for easily testing the propagation path line of sight between a first point and a second point.

  In order to solve the above problems, the invention of claim 1 is a propagation path line-of-sight test system for testing the propagation path line-of-sight test between the first point and the second point, and is arranged at the first point. The first device to be installed is a position information acquisition unit that acquires position information including the latitude, longitude, and altitude of the first point, and a counter that acquires position information including the latitude, longitude, and altitude of the second point. Destination position information acquisition means, reflection means for reflecting sunlight toward the facing destination reflection means disposed at the second point, solar position calculation means for acquiring the position of the sun at the first point, Based on the position information acquired by the position information acquiring means, the position information of the facing destination acquired by the facing destination position information acquiring means, and the position of the sun at the first point calculated by the sun position calculating means, The reflecting means is thick Light is propagation path expected test system characterized in that it and a reflecting means adjusting means for adjusting to reflect the opposite destination reflecting means.

  According to this invention, the position information acquired by the position information acquisition means, the position information acquired by the facing destination position information acquisition means, and the first point acquired by the solar position calculation means by the reflection means adjustment means. The reflecting means is adjusted based on the position of the sun at the position so that the sunlight is reflected by the facing destination reflecting means.

  According to a second aspect of the present invention, in the propagation path line-of-sight test system according to the first aspect, the opposed tip reflecting means is photographed, and the reflecting means adjusting means adjusts the reflecting means when the reflecting means is adjusted. Photographing means for adjusting the means to a position capable of photographing.

  The invention of claim 3 is a propagation path line-of-sight test method for testing the propagation path line-of-sight between the first point and the second point, the reflecting means disposed at the first point, A position information acquisition step for acquiring position information including the latitude, longitude, and altitude of the first point, and the latitude, longitude, and altitude of the second point. Counter position information acquisition step for acquiring position information including: sun position calculation step for acquiring the position of the sun at the first point; position information acquired by the position information acquisition step; and counter position information acquisition Based on the position information of the facing destination acquired by the step and the position of the sun at the first point acquired by the sun position calculating step, the reflecting means reflects the sunlight to the facing destination reflecting means. A propagation path expected test method characterized by and a reflecting means adjusting step of nodes.

  According to the first and third aspects of the present invention, the first device arranged at the first point acquires the position information of the first point, the position information of the second point, and the first point. Since the reflecting means can be adjusted based on the position of the sun so that the sunlight is reflected by the opposing reflecting means, the reflecting means can be adjusted regardless of the hand. That is, it is not necessary to place an operator at each of the first point and the second point, and it is not necessary for the worker to manually adjust the reflecting means. Moreover, the first device also installs the reflecting means in the direction of the opposite station, and it is easy to cause the reflecting means to follow the sun even if the position of the sun changes with time. In this way, it is possible to easily test the visibility of the propagation path between the first point and the second point.

  According to the second aspect of the present invention, the opposing reflection means is imaged by the imaging means, and when the reflection means is adjusted by the reflection means adjustment means, the opposing reflection means is adjusted to a position where it can be imaged. The result of the propagation path line-of-sight test can be easily recorded.

1 is a schematic configuration diagram showing a propagation path line-of-sight test system according to an embodiment of the present invention. It is a figure which shows the example of the propagation path | route visibility test by the propagation path | route visibility test system of FIG. It is a flowchart which shows the information processing by the propagation path | route visibility test system of FIG. It is the schematic of the perpendicular direction which shows the positional relationship of the mirror of the A point in the propagation path | route visibility test system of FIG. 1, and the sun and B point. It is the schematic of the horizontal direction which shows the positional relationship of the mirror of A point and the sun and B point in the propagation path | route visibility test system of FIG. It is a schematic block diagram which shows the propagation path | route visibility test system which concerns on other embodiment of this invention. It is a figure which shows the example of the propagation path | route visibility test by the propagation path | route visibility test system of FIG.

  The present invention will be described below based on the illustrated embodiments.

  1 to 5 show an embodiment of the present invention. In this embodiment, when a microwave radio communication line is newly established, a plurality of points that are visible to each other are selected as antenna installation positions in order to formulate a propagation path between desired points. A case will be described in which a line-of-sight test is performed at point A (latitude Xa, longitude Ya) as the second point and point B (latitude Xb, longitude Yb) as the second point. In addition, at point B, a facing mirror 220 and a video camera 230 are installed in a state of facing point A in advance, and a propagation path line-of-sight test between point A and point B is performed at point A. explain.

  FIG. 1 is a schematic configuration diagram showing a propagation path line-of-sight test system 1 according to an embodiment of the present invention. The propagation path line-of-sight test system 1 is a system for testing the propagation path line between point A and point B as shown in FIG. 2, and is disposed at point A as shown in FIG. The first device 2 mainly includes a GPS 21 as a position information acquisition unit, a mirror 22 as a reflection unit, a video camera 23 as a photographing unit, a horizontal rotation unit 24, an elevation angle adjustment unit 25, and a solar position calculation. A sun position calculation task 32 as a means, an opposite position information acquisition task 33 as an opposite position information acquisition means, a mirror adjustment task 34 as a reflection means adjustment means, a control unit 10 for controlling these, and a storage Part 11.

  The GPS 21 is a satellite positioning system, and acquires position information including the latitude Xa, longitude Ya, altitude, and direction of the point A and stores it in the storage unit 11. The direction is a direction in which the mirror 22 and the video camera 23 are directed toward true north.

  The mirror 22 reflects sunlight toward the facing mirror 220 disposed at the point B. The mirror 22 is rotatable in the horizontal direction by a horizontal rotation unit 24 described later, and the elevation angle is adjusted by the elevation angle adjustment unit 25. That is, the inclination can be changed. The mirror 22 is disposed above the video camera 23 via a support member 221. The mirror 22 repeats slight vibrations in the horizontal direction and the vertical direction, and the size and brightness of sunlight reflected on the facing mirror 220 change in a short period.

  The video camera 23 shoots the facing mirror 220 and is arranged so that the lens faces in the same direction as the mirror surface of the mirror 22. Since the video camera 23 is disposed on the tripod 231, when the mirror 22 is adjusted by a mirror adjustment task 34 described later, the camera platform (not shown) rotates in the horizontal direction, so that the video camera 23 Also, it rotates in the horizontal direction and faces the direction of the point B, so that the facing mirror 220 can be photographed. When installing this video camera 23, it is installed after confirming that it is level using a level (not shown). In addition, the current time, the position information of the point A, the position information of the point B, and the position information of the sun are recorded together on the video imaged by the video camera 23.

  The horizontal rotation unit 24 is for controlling the pan head of the tripod 231 in the horizontal direction based on a control signal from a mirror adjustment task 34 described later. The horizontal rotation unit 24 allows the video camera 23 disposed on the tripod head of the tripod 231 and the mirror 22 disposed on the video camera 23 to be rotatable in the horizontal direction. The current value of the direction (angle with respect to true north) of the horizontal rotation unit 24 is stored in the storage unit 11.

  The elevation angle adjustment unit 25 controls the elevation angle, that is, the inclination of the support member 221 that supports the mirror 22 from below based on a control signal from a mirror adjustment task 34 described later. By the elevation angle adjusting unit 25, the mirror 22 disposed on the support member 221 can change the elevation angle, that is, the inclination. The current value of the elevation angle (angle with respect to the horizontal) of the elevation angle adjustment unit 25 is stored in the storage unit 11.

  The horizontal rotation unit 24 and the elevation angle adjustment unit 25 can adjust the mirror 22 so that the mirror 22 can reflect sunlight and the elevation angle.

  The sun position calculation task 32 is a program or task capable of calculating the sun's azimuth φs and altitude (elevation angle) θs based on the latitude Xa, longitude Ya, and the current time of point A. The sun position calculation task 32 transmits a control signal to the GPS 21 so as to acquire the latitude Xa and longitude Ya of the current point A.

  The facing position information acquisition task 33 is a program or task having a function of acquiring position information including the latitude Xb, longitude Yb, altitude, and direction of the point B of the facing destination. Here, the latitude Xb, the longitude Yb, and the altitude of the point B are stored in the storage unit 11 in advance.

  The mirror adjustment task 34 moves the mirror 22 based on the position information acquired by the GPS 21, the position information acquired by the facing position information acquisition task 33, and the position of the sun at the point A acquired by the sun position calculation task 32. , A program and a task having a function of adjusting so that sunlight is reflected by the facing mirror 220.

  The mirror adjustment task 34 calculates the vertical angle θab between the points A and B and the counterpart (point B) direction φa at the point A, and then calculates the vertical angle θm of the mirror 22 and the direction φm of the mirror 22. Then, the vertical angle and direction of the mirror 22 are adjusted so that the sunlight is reflected by the facing mirror 220. Specifically, for example, in the case shown in FIGS. 4 and 5, the adjustment is performed as follows.

First, the vertical angle θab between the points A and B shown in FIG. 4 is calculated by the following equation.
θab = tan ^ (− 1) · {h / L}
Here, h is an elevation difference between the points A and B, and L is a distance between the points A and B.

Further, the partner direction φa at the point A shown in FIG. 5 is calculated by the following equation.
φa = 90−atan2 (sin (Xb−Xa),
cos (Ya) tan (Yb) -sin (Ya) cos (Xb-Xa))

  Further, the vertical angle θm of the mirror 22 is calculated based on the elevation angle θs of the sun calculated by the solar position calculation task 32 shown in FIG. 4 and the vertical angle θab between the points A and B calculated by the above formula. . Here, the vertical angle θm of the mirror 22 is an angle formed by the perpendicular direction with the horizontal plane, and is an intermediate angle between the elevation angle θs of the sun and the vertical angle θab between the A point and the B point.

  Further, the direction φm of the mirror 22 is calculated based on the sun direction φs calculated by the sun position calculation task 32 shown in FIG. 5 and the counterpart direction φa at the point A calculated by the above formula. Here, the direction φm of the mirror 22 is a perpendicular direction, which is an intermediate direction between the sun direction φs and the counterpart direction φa at the point A.

  Then, a control signal that rotates the mirror 22 in the horizontal direction so as to have the direction φm is transmitted to the horizontal rotation unit 24. In addition, a control signal for setting the mirror 22 to the vertical angle θm is transmitted to the elevation angle adjustment unit 25. In this way, the mirror 22 is adjusted so that sunlight is reflected by the facing mirror 220. Further, the adjusted mirror 22 repeats slight vibrations in the horizontal direction and the vertical direction, and the brightness of sunlight reflected by the facing mirror 220 changes. At this time, the video camera 23 rotates in the horizontal direction together with the mirror 22.

  The photographing task is a program or task having a function of controlling the video camera 23 so as to photograph the opposite mirror 220.

  Next, a line-of-sight test method using the propagation path line-of-sight test system 1 having such a configuration will be described.

  When a microwave radio communication line is newly installed, a plurality of points with a line of sight are selected as antenna installation positions, and a propagation path between desired points is established. Here, a case where a propagation path line-of-sight test between point A and point B is performed at point A will be described.

  At the point A, the first device 2 is disposed, and it is confirmed by the level that the video camera 23 is horizontal. At this time, it is not necessary for the mirror 22 and the video camera 23 to set the direction and the elevation angle toward the point B.

  Further, at the point B, the facing mirror 220 and the video camera 230 are arranged in a state where the direction and the elevation angle are set so as to face the point A.

  And the 1st apparatus 2 is started and the process of the flowchart shown in FIG. 3 is performed. First, the sun position calculation task 32 is activated (step S1), and the sun's azimuth φs and elevation angle θs are calculated based on the latitude Xa, longitude Ya, and current time of point A. Then, the facing position information acquisition task 33 is activated (step S2), and position information including the latitude Xb, longitude Yb, and altitude of the point B is acquired from the storage unit 11. Then, the mirror adjustment task 34 is activated (step S 3), acquired by the position information acquired by the GPS 21, the position information of the point B acquired by the facing position information acquisition task 33, and the sun position calculation task 32. The vertical angle θm of the mirror 22 and the direction φm of the mirror 22 are calculated based on the azimuth φs and the elevation angle θs of the sun at the point A, and the mirror 22 is adjusted so that the sunlight is reflected by the facing mirror 220. Is done. As a result, the sunlight reflected by the mirror 22 is reflected by the facing mirror 220. In addition, since the mirror 22 repeats slight vibrations in the horizontal direction and the vertical direction, the size and brightness of sunlight reflected on the facing mirror 220 changes in a short period.

  Then, the shooting task is activated (step S4), and the facing mirror 220 is shot by the video camera 23. At this time, the photographed image shows a state in which the size and brightness of the sunlight spot reflected on the opposite mirror 220 changes in a short period of time, and the spot size is maximized. The frame is also included.

  Then, the processing from step S1 to step S4 is repeated at predetermined time intervals until the first device 2 is stopped. Thereby, imaging | photography is continued, following the motion of the sun and adjusting the direction and elevation angle of the mirror 22 automatically.

  As described above, according to the propagation path line-of-sight test system 1 and the propagation path line-of-sight test method, the first apparatus 2 disposed at the point A acquires the position information of the point A, the position information of the point B, and Based on the position of the sun at the point A, the mirror 22 can be adjusted so that the sunlight is reflected by the facing mirror 220, so that the mirror 22 can be adjusted regardless of the hand. That is, it is not necessary to place an operator at each of the points A and B, and the operator does not need to manually adjust the mirror 22. Moreover, the first device 2 also adjusts the mirror 22 in the direction of the opposite station, and even if the position of the sun changes with time, it is easy to cause the mirror 22 to follow the sun. In this way, it is possible to easily test the visibility of the propagation path between the points A and B.

  Further, the opposite mirror 220 is photographed by the video camera 23, and when the mirror 22 is adjusted by the mirror adjustment task 34, the opposite mirror 220 is adjusted to a position where it can be photographed. The result can be easily recorded.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above embodiment, and even if there is a design change or the like without departing from the gist of the present invention, Included in the invention. For example, in the above-described embodiment, it has been described that the opposite mirror 220 is imaged by the video camera 23. However, from the captured image, a frame in which the size of the light spot is maximized is used as an image. Of course, a process of cutting out may be added.

  In addition, although it has been described that the propagation path line-of-sight test is performed using the facing mirror 220 and the video camera 230 that are installed in advance at the point B, as shown in FIG. 6 and FIG. A propagation path line-of-sight test system 100 in which a first device 200 having a function equivalent to that of the first device 2 is provided and a second device 300 having a function equivalent to that of the first device 2 is provided at a point B. The propagation path line-of-sight test between the points A and B may be performed at the points A and B. Here, since the 1st apparatus 2, the 1st apparatus 200, and the 2nd apparatus 300 have an equivalent function, detailed description is abbreviate | omitted by attaching | subjecting the same or corresponding code | symbol.

  The first device 200 includes the communication unit 12 and can communicate with the second device 300 via the communication network NW.

  The facing position information acquisition task 33 is a program or task having a function of acquiring position information including the latitude Xb, longitude Yb, altitude, and direction of the point B of the facing destination. The latitude Xb, longitude Yb, and altitude of the point B are acquired from the device 300.

  The second device 300 is configured in the same manner as the first device 200, and can communicate with the first device 200 via the communication network NW.

  And according to such a propagation path line-of-sight test system 100, since each mirror 22 of A point and B point is adjusted so that sunlight may reflect on the opposing mirror 220, in A point and B point The propagation path line-of-sight test between the A point and the B point can be carried out mutually. Thereby, the number of workers at the points A and B can be reduced.

DESCRIPTION OF SYMBOLS 1 Propagation path line-of-sight test system 2 1st apparatus 21 GPS (position information acquisition means)
22 Mirror (reflection means)
23 Video camera (photographing means)
24 horizontal rotation part 25 elevation angle adjustment part 32 sun position calculation task (sun position calculation means)
33 Opposite location information acquisition task (opposite location information acquisition means)
34 Mirror position adjustment task (reflecting means adjusting means)
220 Opposite destination mirror 230 Opposite destination video camera

Claims (3)

A propagation path line-of-sight test system for testing the propagation path line-of-sight between a first point and a second point,
The first device disposed at the first point is:
Position information acquisition means for acquiring position information including the latitude, longitude, and altitude of the first point;
Opposing location information acquisition means for acquiring location information including the latitude, longitude, and altitude of the second point;
A reflecting means for reflecting sunlight toward the facing tip reflecting means disposed at the second point;
Solar position calculating means for acquiring the position of the sun at the first point;
Based on the position information acquired by the position information acquiring means, the position information of the facing destination acquired by the facing destination position information acquiring means, and the position of the sun at the first point calculated by the sun position calculating means, Reflecting means adjusting means for adjusting the reflecting means so that the sunlight is reflected by the opposing reflecting means;
A propagation path line-of-sight test system characterized by comprising: An imaging unit that takes an image of the opposing-reflecting unit and adjusts the opposing-reflecting unit to a position where the reflecting unit can be imaged when the reflecting unit is adjusted by the reflecting unit adjusting unit;
The propagation path line-of-sight test system according to claim 1, comprising: A propagation path line-of-sight test method for testing the propagation path line-of-sight between a first point and a second point, wherein the reflection means is disposed at the first point, and is disposed at the second point. And opposite facing reflecting means,
A position information acquisition step of acquiring position information including the latitude, longitude and altitude of the first point;
A facing position information acquisition step of acquiring position information including the latitude, longitude, and altitude of the second point;
A solar position calculating step for acquiring the position of the sun at the first point;
Based on the position information acquired by the position information acquisition step, the position information of the facing destination acquired by the facing destination position information acquiring step, and the position of the sun at the first point acquired by the sun position calculating step, A reflecting means adjusting step for adjusting the reflecting means so that sunlight is reflected by the opposing reflecting means;
A propagation path line-of-sight test method characterized by comprising:

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