JPH0785016B2 - Survey targets and transmission towers - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveying target and a power transmission tower for surveying using a lightwave range finder.

[0002]

2. Description of the Related Art Conventionally, when a distance between two points is measured using a lightwave rangefinder, an operator holds a surveying target at the measurement point and outputs light from the lightwave rangefinder installed at the observation point. The orientation of the survey target is adjusted so that it returns to.
The conventional survey targets used in this case are:
There is one that returns light in the same direction as the incident direction by using a glass prism in which one corner of a cube is cut out.

For example, in order to pass a power transmission line to a power transmission tower, it is necessary to measure the length between the electric wire support points of the power transmission tower. Conventionally, when measuring this length, a worker having a surveying target climbs a steel tower, directs the target to an observation point, and measures the distance to the target at the observation point using an optical distance meter.

[0004]

However, in the conventional surveying technology, it is not possible to carry out surveying unless a worker is placed at the surveying point, so labor saving cannot be achieved, and the surveying point Since it takes time to move from one station to the next, there is a problem that the survey takes time. In particular, in the case of surveying power transmission towers, it is difficult to arrange the workers because it is necessary to arrange a worker at a high place to climb the power transmission tower, and the survey involves dangerous work at a high place. Moreover, there is a problem that it takes a considerable amount of time for surveying because it takes a very long time for the worker to move the measuring point.

The present invention has been made by paying attention to such a conventional problem, and it is possible to carry out surveying without arranging an operator at the surveying point, thereby saving labor and shortening the surveying time. In particular, in the case of surveying power transmission towers, surveying can be done without climbing the towers, eliminating the need for workers at high places and dangerous work at high places, and the surveying time is significantly shortened. An object is to provide a surveying target and a transmission tower that can be used.

[0006]

In order to achieve the above object, a surveying target according to the present invention comprises an adhesive on the opposite surface of a rectangular retroreflective sheet having a plurality of trihedral cube-corner lens elements on the reflective surface. Alternatively, a magnet is attached, a collimation frame is provided on the peripheral portion of the reflecting surface, and two sides of the retroreflective sheet are along a direction in which the wide-angle property of the retroreflectivity of reflected light is maximized. The directionality and the center marking are respectively provided on the center of the collimation frame and the center of the collimation frame along two sides perpendicular to the two sides.

The retroreflective sheet has a high reflection brightness,
Those having excellent wide angle properties are preferable.

[0008]

The collimation frame is a frame for facilitating the confirmation of the survey target with the naked eye or a telescope. The collimation frame is
In order to make the confirmation conspicuous from the surrounding environment, for example, it is colored red or colored with a fluorescent paint. The directionality and the center indication are indications indicating the orientation of the survey target that maximizes the wide-angle property of the recursive characteristic of the reflected light and the center of the survey target for determining the position of the survey point.

[0010]

In the power transmission tower according to the present invention, the surveying target according to claim 1 is attached in the vicinity of the electric wire support point.

The surveying target according to the present invention may be attached to various structures such as buildings, ships and dams, as well as work vehicles, in addition to power transmission towers.

[0013]

The surveying target according to the present invention is used by being attached to a surveying point with an adhesive or a magnet. When attaching the surveying target to the measurement point, look at the directionality of the collimation frame and the center marking, and attach the surveying target at an angle that maximizes the wide-angle property of the recursive characteristic of the reflected light. When surveying, first check the collimation frame from the observation point with the naked eye or a telescope, and set the optical distance meter in that direction. Since the collimation frame is located at the periphery of the reflecting surface, it does not hinder the reflection of light. The direction and center markings can be viewed and the stations can be aimed from the intersection of their extensions. The retroreflective sheet returns the light received by the plurality of trihedral cube-corner lens elements to the observation point. The retroreflective sheet has a wide angle property, and not only the light from the direction perpendicular to the surface, but also the light inclined from the vertical direction,
Return it to the direction it received the light. Therefore, if you stick it to a measuring point, even if the direction of the reflecting surface is slightly shifted from the observing point, the light from the observing point's lightwave rangefinder will be returned to that measuring point and the distance between the observing point and the measuring point will be reduced. The distance can be measured.

Therefore, if the measurement points are pasted in advance, it is possible to measure from any observation point without placing a worker at the measurement point during the measurement. In addition, during surveying, it is possible to save the time required for the worker to move from surveying point to surveying point.

[0015]

[0016]

In the power transmission tower according to the present invention, by providing the surveying target before the construction, the length between the electric wire supporting points can be measured even if the worker does not climb the tower after the construction. Arrangement of workers at high places and dangerous work at high places can be eliminated.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention.

As shown in FIGS. 1 and 2A, the surveying target 10 is composed of a retroreflective sheet 20 and a magnetic sheet 30 and has a square shape of 6 cm × 6 cm, and has a size of 1-2.
It has a thickness of mm. As shown in FIG. 2A, the retroreflective sheet 20 includes a liner 21 and an adhesive layer 22.
It has a layered structure including a seal portion 23, a main body 24, and a transparent plastic film 25.

The body 24 has a plurality of trihedral cube corner lens elements 24a. Lens element 24a
Has the sequence shown in FIG. Each lens element 24
As shown in FIG. 2C, a has a property of reflecting the incident light A in the incident direction. A plurality of lens elements 24a
Form the reflecting surface of the surveying target 10. The retroreflective sheet 20 has a wide-angle property of retroreflectivity of reflected light in the arrangement of lens elements as shown in FIG. 2B, and is light from a direction inclined to a vertical direction to some extent, Retroreflective is possible. The reflection surface of the surveying target 10 is white.

The retroreflective sheet 20 has a trade name of "Scotchlight seal sheet, diamond grade 3".
970G (Sumitomo 3M Limited) "is suitable. The magnetic sheet 30 is attached to the entire surface of the retroreflective sheet 20 opposite to the reflective surface with an adhesive.

The surveying target 10 has a collimation frame 26 at the periphery of the reflecting surface of the retroreflective sheet 20. The collimation frame is a frame for facilitating confirmation of the survey target 10 with the naked eye or a telescope. The collimation frame 26 has a width of 1 cm, is entirely red, and has a black outline 26a.

Two of the four sides of the retroreflective sheet 20 are along the direction in which the wide-angle property of the retroreflectance of the reflected light is maximized, and the central portion of the collimation frame 26 along one side 10b thereof. A collimation frame 26 along two sides 10a and 10c perpendicular to the two sides
Direction and center markings 2 in the center of
7, 28, 29 are provided. The directionality and center markings 27, 28, 29 have a black band shape.
Directionality and center markings 27, 28, 29 are marking 2
It is shown that the horizontal wide angle of the surveying target 10 is maximized when 8 is arranged upward. That is, the marking 27
It shows that the wide angle is large in the directions of and 29. Further, the markings 27, 28, and 29 indicate that the intersection of these extended lines is the center of the survey target 10.

As shown in FIG. 3, the surveying target 10 is attached by a magnetic sheet 30 in the vicinity of an electric wire support point 41 of a power transmission tower 40. The survey target 10 is attached before the power transmission tower 40 is constructed. When attaching the survey target 10, looking at the directionality of the collimation frame 26 and the center markings 27, 28, and 29, when the power transmission tower 40 is built, the marking 28 faces upward and the horizontal wide angle is maximum. Stick it at an angle.

Next, the surveying method and operation will be described. As shown in FIG. 3, surveying is performed with the electric wire support point 41 of the power transmission tower 40 to which the surveying target 10 is attached as a surveying point.

An optical distance meter 42 is installed at the observation point.
The modulated light wave emitted by this light wave distance meter 42 is reflected by the surveying target 10, the reflected modulated light wave is received by the light wave distance meter 42, and the distance between the observation point and the measurement point is measured by the light wave distance meter 42. be able to. The trade name “Wild Dust Mat DIOR 3002S and Theomat T1610 (manufactured by Leica Corporation)” is suitable for the light wave range finder 42.

First, from the observation point, the collimation frame 26 of the surveying target 10 at the measurement point is confirmed with the naked eye or a telescope, and the optical distance meter 42 is set in that direction. Collimation frame 26
Since it is on the periphery of the reflecting surface, it does not hinder the reflection of light. In addition, directionality and center markings 27, 28, 2
You can look at 9 and aim at the station.

When the lightwave rangefinder 42 is set, the modulated lightwave is emitted from the lightwave rangefinder 42. Survey target 1
The retroreflective sheet 20 of 0 returns the light received by the plurality of trihedral cube-corner lens elements 24a from the optical rangefinder 42 at the observation point to the observation point. Retroreflective sheet 20
Has a wide angle and returns not only light from a direction perpendicular to the surface but also light from a direction inclined from the vertical direction to the direction in which the light is received. Therefore, if it is pasted on the measurement point in advance, even if the direction of the reflecting surface is slightly displaced from the observation point, the light from the lightwave distance meter 42 at the observation point is returned to the lightwave distance meter 42, and the observation point and the measurement point The distance between and can be measured.

At the same time as the distance measurement, the direction angle and the vertical angle of the two steel towers can be observed by the theodolite to obtain the distance between the electric wire support points 41. In addition, survey target 1
Since the position of 0 and the position of the electric wire support point 41 are slightly deviated, the distance needs to be corrected.

The retroreflective sheet 20 having the trade name "Scotchlight seal reflective sheet diamond grade 3970G (manufactured by Sumitomo 3M Limited)" is capable of retroreflective up to an incident angle of 30 degrees. Since the retroreflective sheet 20 is inexpensive, the surveying target 10 can be manufactured at low cost. This retroreflective sheet 20
The survey target 10 using is capable of measuring a distance between a measurement point and an observation point from 1 to 10 km.

As described above, by sticking to the measuring point in advance, it is possible to arrange an operator at the measuring point during surveying.
It is possible to measure from any observation point. Further, during surveying, the time required for the worker to move from the survey point to the survey point can be saved, and the survey time is not affected by the traveling time of the worker.

In particular, in the case of surveying the power transmission tower 40, in the past, in order to arrange a total of 6 workers at a high place to climb the power transmission tower, 3 at each of the front and rear steel towers, the worker climbs at a high tower. I was adjusting the direction of the survey target. For this reason, the surveying involves a dangerous work at a high place, and it takes a long time for the worker to move the surveying points.

However, by providing the surveying target 10 before the construction of the steel tower 40, it becomes possible to measure the length between the electric wire support points 41 without the worker climbing the steel tower 40 after the construction. . As a result, it is possible to eliminate the arrangement of workers at high places and the dangerous work at high places, and to significantly reduce the surveying time.

Further, since the date and time of the survey is not limited by time, it is possible to perform the survey at any time such as a vacant time in another construction process. The survey target 10
Is applicable not only to the survey of transmission towers but also to any survey.

[0035]

According to the surveying target and the transmission tower of the present invention, the surveying target can be attached to the measuring point with an adhesive or a magnet, and the direction of the reflecting surface can be observed by the wide angle of the retroreflective sheet. Since it has recursiveness even if it is slightly deviated from the point, by attaching it to the survey point in advance, it is possible to perform surveying without arranging a worker at the survey point, saving labor and shortening the survey time. can do. In the surveying target according to the present invention, since it has a collimation frame, it is easy to confirm with the naked eye or a telescope, and since the collimation frame has a directional indicator and a center indicator, the wide-angle property is maximized at an angle. Can be stuck,
Moreover, it is easy to aim the light rangefinder accurately from the intersection of these extensions.

[0036]

[0037]

Particularly, in the power transmission tower according to the present invention, by providing the surveying target before the construction, it is possible to measure the length between the electric wire support points without the worker climbing the tower after the construction. It is possible to shorten the survey time by eliminating the work of workers at high places and the dangerous work at high places.

[Brief description of drawings]

FIG. 1 is a front view of a surveying target according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view (A), a partially enlarged front view (B) and an explanatory view (C) of a surveying target according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a surveying method according to an embodiment of the present invention.

[Explanation of symbols]

 10 Surveying Target 20 Retroreflective Sheet 24a Trihedral Cube Corner Lens Element 26 Collimation Frame 27, 28, 29 Directional and Center Marking 30 Magnetic Sheet 40 Power Transmission Tower 41 Wire Support Point 42 Optical Distance Meter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Sho 56-133571 (JP, U) Rikai 3-103403 (JP, U) Rikai 3-93721 (JP, U)

Claims (2)

[Claims] 1. An adhesive or a magnet is attached to the opposite surface of a rectangular retroreflective sheet having a plurality of trihedral cube-corner lens elements on the reflective surface, and a collimation frame is provided at the peripheral portion of the reflective surface, and the retroreflector is provided. The two sides of the reflective sheet are along the direction in which the wide-angle property of the recursive characteristics of the reflected light is maximized, and along the one side thereof, the center part of the collimation frame and the two sides perpendicular to the two sides. A surveying target, characterized in that directionality and a center mark are respectively provided on the center of the collimation frame. 2. A power transmission tower, wherein the surveying target according to claim 1 is attached near an electric wire support point.