JP6861938B1 - Surveying target device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surveying target device which can be easily and surely positioned and is not easily blown off by the influence of wind. A surveying target device 1 is composed of a hemispherical target sphere main body 11, a magnet 21, and a surveying pin 31. A recess 11a is formed in the target sphere main body 11, and a magnet 21 is attached to the inner bottom surface of the recess 11a. The survey pin 31 is made of a magnetic material that can be attracted to the magnet 21, and when the head is inserted into the recess, it magnetically adheres to the magnet 21. [Selection diagram] Fig. 1

Description

The present invention relates to a target device used in surveying with a laser scanner.

In recent years, before the construction of a structure, a three-dimensional laser scanner has been used to perform a three-dimensional survey for grasping the current state of the topography inside and outside the site and surrounding buildings. This three-dimensional survey is performed by installing a spherical or plate-shaped target at a predetermined point. The target is placed directly on the ground surface or via a stand. However, it was often difficult to place the target directly above a predetermined point. In addition, since the survey is mainly performed outdoors, there is a problem that the target device may shake or move due to the influence of wind or the like, and the survey cannot be performed accurately.

Japanese Unexamined Patent Publication No. 58-148909 Japanese Unexamined Patent Publication No. 11-125513

In order to solve such a problem, Patent Document 1 proposes a technique in which a protrusion such as a pin is integrally provided on the target body. However, this has a problem that the pin cannot be driven into the ground with asphalt or the like.

Further, in Patent Document 2, a circular through hole in which the surveying nail 51 provided on the surveying stake 5A can be visually recognized from above by using the mini tripod 1 provided with the target support 2 and the support 3 for supporting the target 4. A technique in which the (visual hole) 22 is provided has been proposed. However, in the visual confirmation, there is a problem that the survey takes a long time, and there is a possibility that the target may be displaced by the visual operator, and the target may be blown off by the wind. In particular, when the target sphere is installed on a sloping ground via a tripod or the like, the target sphere body is displaced in the horizontal direction because the target sphere body is not located directly above the reference ground surface (for example, a surveying stud). There was a problem that the position of the target sphere body had to be specified after calculating.

Therefore, the present invention provides a surveying target device that facilitates and ensures positioning, can specify an accurate position even on a slope, is less likely to shake even under the influence of wind, and is less likely to be blown away.

The surveying target device according to claim 1 is a hemispherical shape in which a recess is formed by hollowing out a part of the hemisphere from the central portion of the plane forming the hemisphere toward the top of the curved surface forming the hemisphere. It is characterized by including a target sphere body, a magnet attached to the inner bottom surface of the recess, and a surveying pin made of a magnetic material that can be attracted to the magnet and having a head that can be inserted into the recess.

The surveying target device according to claim 2 is the surveying target device according to claim 1, wherein the target sphere body is a hemisphere larger than half of a sphere cut by a plane that does not pass through the center of the sphere. When the height of the head of the surveying pin is substantially the same as the distance from the center of the plane that does not pass through the center of the sphere to the center of the sphere, and the head is inserted into the recess. , The head and the magnet are configured to be in contact with each other at the center of the sphere.

The surveying target device according to claim 3 is the surveying target device according to any one of claims 1 or 2 , wherein the survey pin has its head protruding from the ground surface. The target sphere body is installed in a state where the head of the survey pin is inserted into the recess and the plane of the target sphere body is in contact with the ground surface.

The surveying target device according to claim 4 is a hemispherical shape in which a recess is formed by hollowing out a part of the hemisphere from the central portion of the plane forming the hemisphere toward the top of the curved surface forming the hemisphere. From a target sphere body, an adapter that is detachably provided from the recess and has an opening that has the same opening direction as the recess, a magnet attached to the inner bottom surface of the adapter, and a magnetic material that can be attracted to the magnet. comprising a comprising surveying pin, wherein the opening of the adapter, have a shape corresponding to the shape of the head of the surveying pin, said target ball body, the cut sphere in a plane that does not pass through the center of the sphere It is a hemisphere larger than half, the height of the head of the surveying pin is approximately the same as the distance from the center of the plane not passing through the center of the sphere to the center of the sphere, and the head is the opening. It is characterized in that the head and the magnet are configured to be in contact with each other at the center of the sphere when the magnet is inserted into the portion.

The surveying target device according to claim 5 is the surveying target device according to claim 4 , wherein a protrusion extending outward from the outer peripheral surface around the axis is formed on the head of the survey pin. The adapter is characterized in that a guide engaging portion is formed to guide and engage the protrusion.

The surveying target device according to claim 6 is the surveying target device according to any one of claims 4 or 5 , wherein the surveying pin has its head protruding from the ground surface. implanted into the target ball body, is inserted the head of the surveying pin before Symbol in the opening, the plane of the target sphere body, characterized in that it is placed in a state in contact with the ground surface.

The surveying target device according to the present invention can be easily and reliably positioned, and the target sphere body can be less likely to shake and be blown away even if it is affected by some wind.

In addition, by fixing the surveying pin to the ground with the head, which is the tip of the surveying pin, protruding from the ground surface to the ground, there is no risk of the surveying pin falling over, and when the target ball body is placed on the surveying pin, magnetism is eliminated. It is possible to confirm whether or not the insertion was possible by the reaction of the arrival, so that the positioning can be performed reliably.

In addition, the magnet is not directly attached to the target sphere body, but is detachable via an adapter, and the adapter is shaped to correspond to the shape of the head of the survey pin so that the head of the survey pin can be attached. The adapter can be selected according to the shape of the part. As a result, the target sphere main body can be commonly used, the manufacturing cost can be reduced, and the number of target sphere main bodies to be brought at the time of surveying can be reduced.

Furthermore, by forming a guide engaging portion that guides and engages the protrusion on the adapter, positioning can be performed more reliably, and rotation and shaking of the target sphere body due to the influence of strong winds are regulated. can do.

It is a perspective view which shows by disassembling the surveying target apparatus which concerns on embodiment of this invention. It is a perspective view which shows by disassembling the surveying target apparatus which concerns on embodiment of this invention. It is a perspective view which shows by disassembling the surveying target apparatus which concerns on embodiment of this invention. It is a perspective view which shows by disassembling the surveying target apparatus which concerns on embodiment of this invention. It is a front view of the surveying target device which concerns on embodiment of this invention. It is a front view of the surveying target device which concerns on embodiment of this invention. It is a block diagram which shows the use state of the surveying target apparatus which concerns on embodiment of this invention.

The best mode for carrying out the present invention will be described with reference to the drawings.

The surveying target device 1 according to the present invention is mainly used for three-dimensional surveying by a three-dimensional laser scanner. As shown in FIG. 1, the surveying target device 1 includes a target sphere main body 11, a magnet 21, and a surveying pin 31. The target sphere body 11 is a hemisphere composed of a curved surface and a plane, and is cut in a plane that does not pass through the center of the sphere, in addition to the half shape of the sphere cut in the plane that passes through the center of the sphere. Shapes larger than half of the sphere and shapes smaller than half of the sphere are also included. Further, the curvature of the curved surface of the hemisphere does not have to be the curvature of the true sphere.

The target sphere main body 11 is provided with a recess 11a so as to hollow out a part of the hemisphere from the central portion of the plane forming the hemisphere toward the top of the curved surface forming the hemisphere. A receiving ring or the like may be provided on the inner peripheral surface of the recess 11a.

The magnet 21 is attached to the inner bottom surface of the recess 11a so as to leave a space in the recess 11a without protruding outward from the target sphere main body 11. As a result, since the magnet 21 exists inside the target sphere main body 11, it can be stably placed in a state where the plane of the target sphere main body 11 is in contact with the ground surface.

The surveying pin 31 is a metal rod-shaped body composed of a head portion 311 and a shaft portion 312 extending downward thereof, and is made of a magnetic material in which at least the head portion 311 can be attracted to the magnet 21. The surveying pin 31 is driven into the ground and serves as a mark at the time of surveying, and includes a surveying stud, a surveying nail, a surveying stake, and the like. Since many survey pins are made of metal, ready-made products can be used as they are. The shape of the head 311 of the survey pin 31 is circular as shown in FIG. 1, hexagonal as shown in FIG. 2, and rectangular as shown in FIG. 3 when viewed from above in the axial direction. It may be a thing (corresponding to a general surveying pile). The head 311 of the survey pin 31 has a shape that can be inserted into the recess of the recess 11a, and at the time of insertion, an attractive force is generated, and the head 311 and the magnet 21 are magnetically fixed.

Further, the surveying target device 1 may be configured via an adapter 41 as shown in FIGS. 2 and 3. The adapter 41 is a concave body having an opening 41a that opens in the same direction as the opening direction of the recess 11a, and the opening direction of the opening 41a is the same as the opening direction of the recess 11a, and the recess of the target sphere main body 11 It is detachably attached to 11a. If the adapter 41 is provided with gaps at a plurality of locations so that the user's fingers, pins, etc. can be inserted, the adapter 41 can be attached / detached by gripping or rotating, which is more convenient.

A magnet 21 is attached to the inner bottom surface of the concavely formed adapter 41 so as to leave a space in the concave portion 11a into which the head 311 of the survey pin 31 can be inserted. Further, the opening 41a of the adapter 41 has a shape corresponding to the shape of the head 311 of the survey pin 31. That is, if the shape of the head 311 is a hexagon as shown in FIG. 3 when viewed from above in the axial direction, the opening 41a of the adapter 41 is also formed in the hexagon corresponding to the hexagon. .. When the adapter 41 is a tubular body having no inner bottom surface, the magnet 21 is attached to the inner bottom surface of the recess 11a.

If the magnet 21 is attached to the inner bottom surface of the recess 11a as shown in FIG. 1, the surveying pin 31 to be used is specified by the shape of the recess 11a. If the 41 is detachably provided, an adapter 41 having an opening 41a having a corresponding shape can be used according to the shape of the head 311 of the survey pin 31, so that a survey pin having a different shape can be used. Even if 31 is used, if it is replaced with the corresponding adapter 41, it is possible to perform a survey using the same target sphere main body 11.

Here, in the three-dimensional shape measurement using the laser scanner, the laser light is emitted from the laser scanner toward the measurement target object, and the laser light reflected from the measurement target object is acquired as point group data. If the target sphere body 11 rotates or sways, accurate point cloud data cannot be obtained and the three-dimensional shape of the object to be measured cannot be specified. Therefore, if the shape of the head 311 as shown in FIGS. 2 and 3 is hexagonal or rectangular, in addition to the point that positioning can be easily performed, the rotation and sway of the target sphere body 11 can be regulated. It will be possible.

Further, the shape of the head 311 of the survey pin 31 may be a special shape. For example, as shown in FIG. 4, a protrusion 311a is formed from the outer peripheral surface around the axis of the head 311 toward the outside, and a guide engagement portion 411 that guides and engages the protrusion 311a is attached to the adapter 41. It may be formed. More specifically, the guide engaging portion 411 has an inclined surface 411a whose diameter is tapered inward from the opening side in the radial direction, and a groove portion 411b with which the protrusion 311a engages. The inclined surface 411a is formed so as to easily guide the protrusion 311a, and the groove portion 411b is formed so as to engage with the protrusion 311a. Since surveying takes time, it is necessary to position it more reliably in a short time. Therefore, the inclined surface 411a that can guide the groove portion 411b faster than simply providing the groove portion 411b makes it possible to reliably hold the groove portion 411b at a regular position and shorten the time.

Next, as shown in FIG. 5, the configuration and advantages when the target sphere body 11 is a hemisphere larger than half of a sphere cut in a plane that does not pass through the center O of the sphere will be described.

The target sphere body 11 is the hemisphere having the larger volume of the two hemispheres that cut the sphere on the plane P that does not pass through the center O of the sphere, and is located at the center of the plane P that does not pass through the center O of the sphere. The recess 11a is formed by hollowing out a part of the hemisphere toward the top of the curved surface forming the hemisphere. The recess 11a is formed so as to include the center O of the sphere.

A plate-shaped magnet 21 is attached to the inner bottom surface of the recess 11a so as to leave a space in the recess 11a. The plate-shaped magnet 21 is configured so that the center O of the sphere is included at any position on the surface of the recess 11a opposite to the inner bottom surface side. That is, the magnet 21 has a height from the inner bottom surface of the recess 11a to the plane Q passing through the center O of the sphere, which is parallel to the plane P not passing through the center O of the sphere. As shown by the dotted line in FIG. 5, it is desirable that the height of the magnet 21 is adjusted so that the center of the surface of the recess 11a opposite to the inner bottom surface side overlaps the center O of the sphere. ..

The target sphere body 11 has a distance D1 (distance D1 between the plane P and the plane Q) from the center C of the plane P to the center O of the sphere almost the same as the height D2 of the head 311 of the survey pin 31. It is formed to be. Therefore, when the head 311 of the survey pin 31 is inserted into the recess 11a, the head 311 and the magnet 21 are configured to come into contact with each other at the center O of the sphere. As a result, the position of the head 311 of the survey pin 31 and the center O of the sphere of the target sphere body 11 coincide with each other, so that both coordinates, which are the reference of the survey, match. On the other hand, when the target sphere body is installed on a slope via a tripod or the like, the center of the target sphere body is not located directly above the survey pin, so a horizontal error must be taken into consideration. However, in the surveying target device 1 according to the present invention, since the center position O of the sphere of the target sphere main body 11 and the position of the surveying pin 31 are at the same position, the surveying can be performed quickly without considering the error in the horizontal direction. It becomes possible to do.

In FIG. 5, the target sphere main body 11 is formed between the plane P forming the hemisphere and the plane Q which is the cut surface when the shape is half of the sphere cut by the plane passing through the center O of the sphere. The curved surface portion is shown by a curved shape that continues from the curved surface of the hemisphere. As shown in FIG. 6, the target sphere body 11 has a half shape of a sphere cut by a plane Q passing through the center O of the sphere and a hemisphere. It may be a hemispherical shape in which a cylindrical shape having a common plane P is integrated.

Further, the same applies to the case where the adapter 41 is provided, and the magnet 21 is attached to the surface of the adapter 41 opposite to the inner bottom surface side so as to include the center O of the sphere, and the magnet 21 is attached from the center of the plane of the hemisphere to the sphere. The distance to the center O and the height of the head 311 of the survey pin 31 are almost the same height, so that the head 311 of the survey pin 31 and the magnet 21 are in contact with each other at the position of the center O of the sphere. , The depth of the recess 11a and the height of the magnet 21 are adjusted, respectively.

Next, a method of using the target device 1 according to the present invention will be described.

First, as shown in FIG. 7A, the survey pin 31 is driven into the reference position X (the position at the center C of the plane P in FIG. 5). At this time, as shown in FIG. 7B, the surveying pin 31 is fixed to the ground with the head 311 of the surveying pin 31 protruding from the ground surface to the ground. Next, as shown in FIG. 7C, the plane of the target sphere body 11 is directed downward, the head 311 of the survey pin 31 is inserted into the recess 11a, and the plane of the target sphere body 11 comes into contact with the ground surface. It is placed in this way (Fig. 7 (d)). At this time, only when the head 311 of the survey pin 31 and the magnet 21 come close to each other, the head 311 of the survey pin 31 is inserted so as to be guided by the recess 11a, and the head 311 of the survey pin 31 and the magnet 21 are inserted. Is magnetized. Then, the survey is performed in the state shown in FIG. 7 (d). After the survey, the target sphere body 11 is lifted as shown in FIG. 7 (e), and then the head 311 of the survey pin 31 is completely driven into the ground as shown in FIG. 7 (f). To do.

1 Surveying target device 11 Target sphere body 21 Magnet 31 Surveying pin 41 Adapter

Claims (6)

A hemispherical target sphere body in which a recess is formed by hollowing out a part of the hemisphere from the central portion of the plane constituting the hemisphere toward the top of the curved surface constituting the hemisphere, and
A magnet attached to the inner bottom surface of the recess and
A surveying pin made of a magnetic material that can be attracted to the magnet and whose head can be inserted into the recess.
A target device for surveying, which is characterized by being equipped with. The target sphere body is a hemisphere larger than half of a sphere cut in a plane that does not pass through the center of the sphere.
The height of the head of the survey pin is approximately the same as the distance from the center of the plane that does not pass through the center of the sphere to the center of the sphere.
The surveying target device according to claim 1, wherein when the head is inserted into the recess, the head and the magnet are configured to be in contact with each other at the center of a sphere. The survey pin is driven into the ground with the head protruding from the ground surface.
The target ball body, is inserted the head of the surveying pins in the recess, according to claim 1 or 2 plane of the target sphere body, characterized in that it is placed in a state in contact with the ground surface The surveying target device according to any one of the items. A hemispherical target sphere body in which a recess is formed by hollowing out a part of the hemisphere from the central portion of the plane constituting the hemisphere toward the top of the curved surface constituting the hemisphere, and
An adapter that is detachably provided from the recess and has an opening that is in the same opening direction as the recess.
The magnet attached to the inner bottom surface of the adapter and
A surveying pin made of a magnetic material that can be attracted to the magnet,
With
The opening of the adapter, have a shape corresponding to the shape of the head of the surveying pin,
The target sphere body is a hemisphere larger than half of a sphere cut in a plane that does not pass through the center of the sphere.
The height of the head of the survey pin is approximately the same as the distance from the center of the plane that does not pass through the center of the sphere to the center of the sphere.
A surveying target device characterized in that when the head is inserted into the opening, the head and the magnet are configured to come into contact with each other at the center of a sphere. A protrusion extending outward from the outer peripheral surface around the axis is formed on the head of the survey pin.
The surveying target device according to claim 4 , wherein the adapter is formed with a guide engaging portion that guides and engages the protrusion. The survey pin is driven into the ground with the head protruding from the ground surface.
The target ball body, prior SL is inserted the head of the surveying pin into the opening, according to claim 4 or 5 the plane of the target sphere body, characterized in that it is placed in a state in contact with the ground surface The surveying target device according to any one of the above.

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