JPH01110209A - Topographic analyzer for hollow or the like - Google Patents

Abstract

PURPOSE:To achieve a highly accurate topographic analysis for a hollow or the like with a relatively handy construction, by photographing a locus of a laser light moving by steps to analyze the topography of the hollow or the like. CONSTITUTION:A guide rope 3 is arranged vertically almost the center of a hollow 1 and guide ropes 2 and 4 are mounted horizontally in the East-Western way and in the South-Northern way. Moving bodies 13-15 movable by steps are engaged with the guide ropes 2-4 and a laser light source 10, a mirror 12 and a motor 11 for turning the mirror 12 are placed separately on the moving bodies 13-15. Then, the moving bodies 13-15 are moved by steps and the mirror 12 is turned to radiate laser beams 16-18 to the inner surface of the hollow 1. Then, a contour line and a equi-space line obtained are taken with a camera and undergoes a computer processing thereby enabling analysis and measurement of the hollow 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a terrain analysis device for depressions, etc., which accurately measures and analyzes terrain such as depressions and uneven terrain. The present invention relates to an apparatus for analyzing terrain such as depressions, which analyzes terrain such as depressions by imaging the locus of laser light.

[Conventional technology]

2. Description of the Related Art Techniques such as stereo photography have been known for drawing a wide range of topography. This method analyzes images taken from different angles and calculates the distance.
Generally, it is difficult to increase the measurement density, and advanced computer processing techniques are required for precise analysis. A method using aerial photography is also known.

[Problem that the invention seeks to solve]

With this conventional method, it is difficult to improve measurement accuracy, analysis takes time, and precise analysis requires advanced computer processing technology. Furthermore, aerial photographic methods are unsuitable for measuring and analyzing relatively small-scale depressions.

The present invention was created to solve these problems, and provides a terrain analysis device for depressions, etc., which has a relatively simple configuration and is capable of analyzing terrain, such as depressions, with extremely high accuracy. The purpose is to

[Means for solving problems]

The terrain analysis device for depressions, etc. of the present invention includes a first guide cable vertically installed from approximately the center of the depression, a second guide cable suspended horizontally with respect to the depression, and a second guide cable suspended in the horizontal direction with respect to the depression. a third guide cable suspended orthogonally to the guide cable;
A movable body movable along a third guide rope, a laser light source installed on the movable body, a rotatable mirror that deflects the laser light from the laser light source, and a laser irradiated onto the depression etc. and an imaging device for recording the trajectory of light, further according to a preferred embodiment of the invention:
The moving body moves stepwise, and the laser beam is deflected in a right angle direction by a rotatable mirror.

[For production]

A laser light source is moved stepwise along a guide cable that is installed approximately in the center of a depression or the like, that is, installed in the Y-axis direction. The laser light source, which is moved in steps, is deflected by a rotating mirror and irradiates the measurement site while drawing a disk-shaped trajectory.

Guide ropes are also arranged in the X- and Z-axis directions in depressions and the like, and these guide ropes are also equipped with moving laser light sources. The spaced figures, such as depressions, irradiated with laser light are photographed by an imaging device. Analysis and measurement of depressions are performed by computer processing information on line figures photographed by an imaging device.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. The figure is a perspective view of an embodiment of the present invention, and numeral 1 in the figure indicates a depression to be measured. A first guide cable 3 is vertically erected approximately at the center of the depression 1. This guide rope 3 is pulled in a vertical direction by a balloon 9. A fixed wire 8 with one end fixed to the ground is connected to the bottom of the balloon 9 to prevent the balloon from moving due to wind and to prevent unnecessary swinging of the laser light source, which will be described later. . A laser light source 10, a mirror 12, and a motor 11 for rotating the mirror 12 are mounted on the first guide rope 3.
A moving body 14 that can move stepwise along
Since the method of moving such a moving object step by step is well known, its explanation will be omitted. Although it is possible to move the movable body 14 using the motor 11 for rotating the mirror 12, the control becomes somewhat complicated. For reference, the motor 11 is driven to rotate a gear that meshes with the first guide cable 3, and the movable body 14 is moved upward, for example, by about 10 cm.

Thereafter, the meshing is released, a signal is sent to the laser light source 10 to reflect the laser beam, and the mirror 12 is rotated. In this case, the mirror 12 may be constantly rotating together with the rotation of the motor 11. By the rotation of the mirror 12, equal straight lines are drawn in the depression l by the deflected laser beam 17. After photographing this equal straight line with an imaging device, the movable body 14 is again moved upward, for example, by 10 cm, and photographed in the same manner. In this way, equal straight lines at intervals of, for example, 10 cm are recorded on the imaging device. A similar device is provided to draw equally spaced lines using a laser beam in the X-axis direction and Z-axis direction of depression 1. Note that the X-axis direction is generally the east-west direction on the map, and the Z-axis direction is The axis direction is the north-south direction on the map.

It is desirable to suspend the guide cables in the east-west and north-south directions horizontally, but depending on the topography, it may not be possible to suspend them horizontally.

In this case, the guide rope is suspended diagonally and corrected by inputting the angle during computer processing later. The guide line in the X-axis direction is designated by reference number 2. The end of the guide cable 2 is supported and fixed by a stay 5.5'. Since it is necessary to suspend the guide rope 2 without causing any slack in the center, a pulley and a weight may be used at the joint with the stay 5 to apply tension to the guide rope 2.

=6- The movable body 13 attached to the guide rope 2 also moves stepwise like the movable body 14 attached to the guide rope 3. At this time, the laser beam 16 deflected by the mirror 12 is directed to the depression 1.
is irradiated. The locus of equally spaced lines in the X direction of the depression 1 is recorded on the imaging device by irradiation with the laser beam 16. The guide line in the Z-axis direction is designated by reference numeral 4. The end of the guide cable 4 is supported and fixed by a stay 7.7'. Like the guide cable 2, the guide cable 4 needs to be suspended so that no slack occurs in the center, so at the joint with the stay 7,
Tension may be applied to the guide rope 4 using a pulley and a weight. The movable body 15 attached to the guide rope 4 also moves stepwise like the movable body 13 attached to the guide rope 2. At this time, the laser beam 18 deflected by the mirror 12 hits the depression 1.
is irradiated. The locus of equally spaced lines in the Z-axis direction of depression 1 is
An image is taken by the imaging device by irradiation with the laser beam 18. In this embodiment, the balloon 9 is used to suspend the guide cable 3 in the vertical direction, but depending on the scale of the depression 1, the guide cable 3 may be suspended using other means such as a crane. Further, although the imaging device is preferably installed at the bottom of the balloon 9, it may be installed at a high place around the depression 1. Furthermore, it is also possible to provide imaging devices at multiple locations to capture images of the trajectory from multiple directions and use the images as data for mechanical processing.

It goes without saying that the idea of the present invention can be directly applied to mountainous areas.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to obtain a terrain analysis device for depressions, etc., which is capable of analyzing terrain, such as depressions, with extremely high accuracy with a relatively simple configuration.

[Brief explanation of the drawing]

The drawing is a perspective view of an embodiment of the invention. Explanation of symbols

Claims (3)

[Claims] (1) A first guide cable erected vertically from approximately the center of the depression, etc., a second guide cable suspended horizontally with respect to the depression, etc., and suspended orthogonally to the second guide cable. a third guide cable, a movable body movable along the first, second, and third guide cables, a laser light source installed on the movable body, and a laser beam from the laser light source deflected. A terrain analysis device for depressions, etc., comprising a rotatable mirror and an imaging device for recording the locus of laser light irradiated onto the depressions, etc. (2) The terrain analysis device for depressions and the like according to claim 1, wherein the moving body moves in a stepwise manner and the laser beam is deflected in a right angle direction by a rotatable mirror. (3) The terrain analysis device for depressions and the like as set forth in claim 1, wherein the first guide cable is erected at right angles by a balloon.