JPH073792A - Device for measuring plumbing accuracy of column body - Google Patents

Abstract

PURPOSE:To quantitatively determine the plumbing accuracy of a column body at high accuracy without providing heavy equipment at the end of each measuring pipe. CONSTITUTION:Measuring pipes 21, 22 are fitted into a column body 6 and light sources 27, 28 are disposed on the bottom faces of the respective measuring pipes 21, 22. Image pickup devices 24, 26 for picking up images of the light sources 27, 28 are held in a horizontal position above the measuring pipes 27, 28. The coordinate positions of the light sources 27, 28 on the image pickup planes of the image pickup devices 24, 26 are detected and the plumbing accuracy of the column body 6 is computed by a computing portion 31 according to the coordinate positions detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical accuracy measuring device for vertically installing a pillar in the ground with high accuracy.

[0002]

2. Description of the Related Art As a conventional device for measuring and adjusting the vertical accuracy of a column, for example, the one disclosed in Japanese Patent Application Laid-Open No. 4-140315 relates to a method for accurately installing a structure column in a pile hole, After arranging the false columns in a cylindrical casing for excavation, water is injected into the casing to float a float connected to the intermediate portion of the false columns via a wire. Then, while confirming the position of the float, a plurality of hydraulic jacks installed between the casing and the true column are horizontally expanded and contracted to adjust the vertical accuracy of the true column.

[0003]

By the way, in the method using the floating body as described above, since the float oscillates due to the flow of water, the vertical accuracy of the true column cannot be accurately measured. Or, when measuring the vertical accuracy of a long true column, there is a problem that the measurement error becomes large. In addition, it was not suitable for automation because the measured values could not be grasped quantitatively.

On the other hand, for example, JP-A-5-25824
According to the column installation adjustment system described in the publication,
A laser transmitter that emits light in the vertical direction is placed above the verticality measurement pipe that is fitted into the foundation pile pillar that is suspended in the casing, and a light receiver is provided below the measurement pipe. The vertical accuracy can be measured accurately and quantitatively by receiving the laser light of.

However, in such a method using a laser beam, since the light receiver is installed in the lower part of the measuring pipe, the tip of the measuring pipe becomes a heavy bulbous shape and the light receiving device is used. There was a risk that the measuring pipe would break when it was installed or removed.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to construct a column body with high accuracy and quantitatively without providing a heavy instrument at the tip of a measuring pipe. An object of the present invention is to provide a vertical accuracy measuring device for a column, which is capable of measuring the fitting accuracy.

[0007]

In order to achieve the above object, the present invention is directed to a measuring pipe fitted inside a column, and an optical axis disposed on the bottom surface of the measuring pipe so that the optical axis extends in the extending direction of the pipe. A light source provided along with, an optical fiber arranged along the inner side surface of the measuring pipe for guiding light to the light source, and a fixed horizontal arrangement of the light source above the measuring pipe. The gist of the present invention is to include an image pickup device for picking up an image of light and an arithmetic unit for calculating the vertical accuracy of the column based on the coordinate position of the light on the image pickup surface of the image pickup device.

According to another aspect of the invention, the light from the upper part of the measuring pipe is guided to the light source through an optical fiber arranged between the light source and the upper part of the measuring pipe. Use as a summary.

[0009]

According to the present invention, the image of the light source arranged on the bottom surface of the measuring pipe is picked up by the image pickup device fixedly arranged horizontally above the measuring pipe, and the coordinate position thereof is detected. The calculation unit calculates the vertical accuracy of the column based on this detection result.

According to another aspect of the invention, since the light source for guiding the light through the optical fiber is not provided with the light emitting means, the structure is simple and lightweight.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a vertical accuracy measuring device for a column according to the present invention. In the figure,
A CCD camera 24 in which measuring pipes 21 and 22 are fitted into a true column 6 (column body) built in a casing 5 for excavating the ground 1 and horizontally fixed to supporting bases 23 and 25 on the ground surface, 26 is arranged above the measuring pipes 21 and 22. The measurement pipes 21 and 22 are suspended at the upper part by a suspension device (not shown), and the measurement column 6
When tilts, it tilts accordingly.

The CCD cameras 24 and 26 are the measuring pipes 2.
Lights 29 and 30 emitted from light sources 27 and 28 (in this embodiment, ordinary light emitting lamps are used) fixed to the bottom surfaces of the light sources 1 and 22 are received, and coordinate position signals of the light sources 27 and 28 are calculated. Output to the unit 31. The arithmetic unit 31 arithmetically processes the coordinate position signals from the CCD cameras 24 and 26, and
Is displayed on the screen of the display unit 32. Tilt,
For example, as shown in the screen of the display unit 32, the twist is (x,
y) It can be shown as a coordinate value or a gradient.

The image pickup of light by the CCD cameras 24 and 26 is as shown in FIG. 2A when the vertical column 6 is built straight and the vertical error is zero. When a vertical error is generated, it becomes as shown in FIG. FIG. 2B shows that the light sources 27 and 28 on the bottom surface of the measurement pipe are deviated to the lower right when viewed from the CCD cameras 24 and 26 due to the inclination of the true post 6 to the upper left direction. .

In this way, each CCD camera 24, 26
Thus, the vertical error of the true post 6 at each point can be numerically detected as a coordinate position. In this way, the true pillar 6
Since it is possible to detect the vertical error of the numerical value as a numerical value, the hydraulic jacks 33 and 34 provided between the casing 5 and the true post 6 are expanded / contracted in accordance with the vertical error, and the tilt of the true post 6 etc. (Specifically, the displacement of the bottom surfaces of the measurement pipes 21 and 22) can be corrected. In addition, the calculation unit 31
It is also possible to automatically correct the hydraulic jacks 33, 34 by an electric force or the like based on the vertical error of the structure column 6 detected to correct the inclination of the structure column 6. Further, by accumulating the vertical error data of the true column 6, optimal control according to the situation can be performed.

Although FIG. 1 shows the case where two sets of measuring pipes and CCD cameras are installed, the present invention is not limited to this embodiment, and if the number of these sets is increased, vertical error detection can be performed. The accuracy can be increased. Moreover, the light source 2
The electric power can be supplied to the wires 7 and 28 by using an electric wire, a wire is not required in the case of vertical accuracy detection by a floating body, and a beam light such as a laser light emitter needs to be used by using a CCD camera. Nor.

FIG. 3 is a block diagram showing another embodiment of the present invention. In this embodiment, the measuring pipe 21,
Optical fibers 35 and 36 are arranged inside the optical fiber 22, and the upper portions of these optical fibers 35 and 36 are attached to the measuring pipes 21 and 22.
Of the light source 27, 28, and the lower portion thereof is connected to the light sources 27, 28. As a result, the light on the ground is guided to the light sources 27 and 28 via the optical fibers 35 and 36, so that the light sources 27 and 28 only need to have a mirror for reflection, and the configuration can be simplified. The weight can be reduced. In this case, by irradiating the light from the light emitting lamp from the ground toward the upper openings of the optical fibers 35 and 36, the captured image of the light by the CCD camera becomes clearer and the measurement error can be suppressed.

Further, as shown in the figure, by mounting an inclinometer 37 near the center of the upper part of the true post 6, the inclinometer 37 alone can quickly tilt the true post 6 when measurement accuracy is not required. Can be detected and can complement the accuracy measurement according to the invention.

[0018]

As described above, in the vertical accuracy measuring device for a pillar according to the present invention, the pillar can be built accurately and quantitatively without providing a heavy instrument at the tip of the measuring pipe. The accuracy can be measured.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a vertical accuracy measuring device for a column according to the present invention.

2 is an explanatory diagram of light source position detection in the apparatus of FIG.

FIG. 3 is a configuration diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 Ground 5 Casing 6 Structural column 21, 22 Measuring pipe 23, 25 Support stand 24, 26 CCD camera 27, 28 Light source 31 Computing section 32 Display section 33, 34 Jack

Claims (2)

[Claims] 1. A measuring pipe fitted inside a column, a light source arranged on a bottom surface of the measuring pipe so that an optical axis extends along an extension direction of the pipe, and a measuring pipe of the measuring pipe. An image pickup device which is fixedly arranged horizontally above and picks up the light of the light source; and an arithmetic unit which calculates the vertical accuracy of the column based on the coordinate position of the light on the image pickup surface of the image pickup device. Characteristic vertical accuracy measuring device for pillars. 2. The light from above the measuring pipe is guided to the light source through an optical fiber arranged between the light source and the upper portion of the measuring pipe. 1. A vertical accuracy measuring device for a column according to 1.