JP2001091249A - Hollow cross section measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hollow cross section measuring device capable of measuring a hollow cross section with ease and high accuracy. SOLUTION: A hollow cross section measuring device 3 is disposed in a tunnel, and the hollow cross section measuring device 3 is leveled by adjusting a free tripod 2 in accordance with levels 11, 12. A laser distance measuring instrument 8 is leveled by finely rotating an electromagnetic motor 6 in accordance with a level 13, and an irradiating angle of a laser beam is set at 0 deg.. While the electromagnetic motor 6 is being rotated a distance is measured by the laser distance measuring instrument 8 and is recorded. The cross-sectional shape and the cross-sectional area of the tunnel T are computed by a microcomputer 6 from the angle of the hollow cross section measuring device 3, when the range is found and distance data and the like when the range is found.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner space section measuring device for measuring an inner space section.

[0002]

2. Description of the Related Art Heretofore, there has been known a method of measuring an inner cross section of a tunnel as this kind of inner cross section by using, for example, an extensible rod having a distance scale.
In the method of measuring with a telescopic bar, a portion serving as a measurement point is recorded by determining a horizontal or vertical axis direction serving as a reference position.

[0003] However, although the measurement can be easily performed, it is difficult to accurately obtain a reference position for the measurement, and it is difficult to measure an accurate shape. In particular, it is very difficult to measure a large shape, and it is difficult to maintain accuracy.

There is also known a method of performing measurement using a combination of an optical distance measuring device and a theodolite measuring device capable of measuring an angle. The combination of this light wave distance measuring instrument and the theodolite measuring instrument that can measure the angle, installs a light wave measuring instrument at a predetermined distance from the measurement cross section, arbitrarily determines the measuring point of the inner space cross section, The distance to the measuring point of the inner space section is measured with a measuring instrument, the angle of the light wave distance measuring instrument is measured with a theodolite surveying instrument, and the shape of the inner space section is collected by trigonometry.

However, in this case, the measurement accuracy is good if the conditions are good, but the accuracy may not be obtained depending on the relationship between the position of the inner space cross section and the position of the light wave distance measuring device, and depending on the shape of the inner space, The installation location of the lightwave range finder cannot be secured.

[0006]

As described above, in the method which can be measured with an extensible rod having a distance scale,
Although the measurement can be performed easily, it is difficult to accurately obtain a reference position for the measurement, and it is difficult to measure an accurate shape. In particular, it is very difficult to measure a large shape, and it is difficult to maintain accuracy.

Further, in a method of measuring by a combination of a light wave distance measuring device and a theodolite measuring device capable of measuring an angle,
If the conditions are good, the measurement accuracy is good, but accuracy may not be obtained depending on the relationship between the position of the inner space cross section and the position of the light wave distance measuring device, and the installation location of the light wave distance measuring device depending on the shape of the inner space Has a problem that cannot be secured.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an inner space section measuring apparatus capable of easily and accurately measuring an inner space section.

[0009]

According to a first aspect of the present invention, there is provided an inner space section measuring apparatus, comprising: a distance measuring means for irradiating a visible light laser to measure a distance; and an axial direction perpendicular to the inner space section to be measured. Rotating means for rotating the distance measuring means at the center, detecting means for detecting the rotation angle of the rotating means, and storing the distance measured by the distance measuring means corresponding to the rotation angle detected by the detecting means Storage means for performing
By irradiating the visible light laser and measuring the distance, the location to be measured can be visually checked, and the distance measured by the distance measuring means corresponding to the rotation angle detected by the detecting means is stored in the storage means. This makes it possible to easily and accurately measure the inner cross section.

A second aspect of the present invention is a cross section measuring apparatus for calculating an inner cross section based on a rotation angle and a distance stored in a storage means. It is provided with a figure calculation means, and calculates and creates an inner space sectional view by the sectional view calculation means based on the rotation angle and the distance stored in the storage means, so that the shape of the inner space cross section can be easily and accurately formed. Measure.

According to a third aspect of the present invention, there is provided an inner space cross-section measuring device according to the first or second embodiment, wherein the inner space cross-sectional area is calculated based on the rotation angle and the distance stored in the storage means. It is provided with a calculating means, and by calculating the inner space cross-sectional area by the cross-sectional area calculating means based on the rotation angle and the distance stored in the storage means, the inner space sectional area can be measured easily and with high accuracy. .

According to a fourth aspect of the present invention, there is provided an inner space section measuring apparatus according to any one of the first to third aspects, further comprising a measuring means for measuring at least one of vertical and horizontal. Measure the means vertically and / or horizontally.

According to a fifth aspect of the present invention, there is provided an inner space section measuring apparatus according to any one of the first to fourth aspects, further comprising timer means for operating a predetermined time and operating at an arbitrary time. By operating at predetermined time or arbitrarily set time by timer means,
The continuous measurement is performed to measure the change with time of the inner space section.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an inner space section measuring apparatus according to the present invention.

As shown in FIGS. 1 and 2, reference numeral 1 denotes a tripod for installation. The tripod 1 is provided with a free head 2 at an upper part thereof.
On the free head 2, an inner space section measuring device 3 is provided.

In the inner space section measuring apparatus 3, a flat substrate 4 is mounted on the free platform 2 and a storage means and a sectional view calculation device are provided above the free platform 2 on the base end side of the substrate 4. means,
A microcomputer 5 having functions such as a sectional area calculating means and a timer means is provided.

An electromagnetic motor 6 having a function as a rotating means and a detecting means for detecting an angle is disposed on the leading end side of the substrate 4. The electromagnetic motor 6 rotates horizontally toward the leading end of the substrate 4. A shaft 7 is provided, and a laser distance measuring device 8 as distance measuring means is attached to a tip of the rotating shaft 7.

Further, the microcomputer 5 of the substrate 4
Levels 11 and 12 as measuring means for horizontal detection are mounted between the motor and the electromagnetic motor 6 in a direction along the substrate 4 and in a direction perpendicular to the longitudinal direction of the substrate 4.
The laser distance measuring device 8 is provided with a level 13 as measuring means for detecting a plane horizontal to the laser beam.

Next, the operation of the above embodiment will be described.

First, as shown in FIG. 3, an inner space section measuring device 3 is arranged in an inner space section, for example, a tunnel T, and the inner space section measuring device 3 is arranged by a tripod 1 so as to be substantially horizontal. Then, the free pan head 2 is adjusted in accordance with the spirit levels 11 and 12 to level the inner space section measuring device 3. The tunnel T
It is preferable that the rotation shaft 7 of the laser distance measuring device 8 of the inner space cross-section measuring device 3 substantially coincides with the substantially central axis because the measurement angle variation is substantially constant and the measurement point displacement is substantially constant. By changing the displacement amount, the change in the moving distance of the measurement point may be reduced so that a sufficient measuring resolution can be obtained.

Next, according to the level 13, the electromagnetic motor 6 is slightly rotated to level the laser distance measuring device 8, and the irradiation angle of the laser beam is set to 0 °.

Then, as shown in FIG.
While rotating or stopping the rotation, the angle of the electromagnetic motor 6 is output by the electromagnetic motor 6, the distance is measured and recorded by the laser distance measuring device 8 at each predetermined angle, and the inner circumference of the tunnel T, that is, These are measured and recorded over 360 °. When the electromagnetic motor 6 is rotating, a laser beam may be constantly emitted by the laser distance measuring device 8 so that the measurement position can be set to be visible, or the distance can be measured at an arbitrary angle α. Good.

In addition, corner portions where lines are not continuous during measurement,
For example, if the distance is not measured for points A and B, a large error is likely to occur. Therefore, the points A and B are input in advance, and the distance is set to be always measured in these parts. In this case, a change in the surface of the measurement data at that time may be captured, and points A and B at which the surface changes may be automatically driven and measured.

In this way, from the angle of the inner space section measuring device 3 at the time of distance measurement, the distance data at the time of distance measurement, and the like,
The microcomputer 6 calculates the sectional shape and the sectional area of the tunnel T.

By changing the angular resolution of the laser distance measuring device 8, for example, if the resolution is made coarse, less data can be obtained, so that the calculation speed can be increased. The error can be reduced and the accuracy can be increased.

If such an operation is continuously performed at predetermined time intervals or at an arbitrarily set time interval by the timer means, it is possible to measure a change with time of the inner surface of the tunnel T.

According to the above-described embodiment, by rotating the laser distance measuring device 8, high-speed and high-precision 360 °
The cross-sectional dimensions can be measured in an arbitrary range, and the range-measuring part can be visually observed using a visible light laser. .

Further, if it is installed as it is, the inner space section can be continuously measured.

[0029]

According to the inner space section measuring apparatus of the first aspect, the position to be measured can be visually observed by irradiating the visible light laser to measure the distance, and the rotation angle detected by the detecting means. By storing the distance measured by the distance measuring means in the storage means in correspondence with the above, it is possible to easily and accurately measure the inner space section.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, in addition to the inner space section measuring apparatus of the first aspect, the inner space section is calculated by the sectional view calculating means based on the rotation angle and the distance stored in the storage means. By calculating and creating the figure, the shape of the inner hollow section can be easily and accurately measured.

According to the inner space section measuring apparatus of the third aspect, in addition to the inner space section measuring apparatus of the first or second aspect,
By calculating and creating the inner space cross-sectional area by the cross-sectional area calculating means based on the rotation angle and the distance stored in the storage means,
The inner cross-sectional area can be easily and accurately measured.

According to the inner space section measuring apparatus of the fourth aspect, in addition to the inner space section measuring apparatus of any one of the first to third aspects, at least one of vertical and horizontal of the measuring means can be measured.

According to the inner space section measuring apparatus of the fifth aspect, in addition to the inner space section measuring apparatus of any one of the first to fourth aspects, the apparatus is operated every predetermined time or at an arbitrarily set time by the timer means. With this, it is possible to continuously measure the change of the inner space section with time.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an inner space section measuring apparatus according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an explanatory diagram showing a use state of the same.

[Explanation of symbols]

3 Internal-air cross-section measuring device 5 Microcomputer as storage means, cross-section calculating means, cross-sectional area calculating means and timer means 6 Electromagnetic motor as rotating means and detecting means 8 Laser distance measuring devices 11 and 12 as distance measuring means 13 Level as a measuring means

Claims (5)

[Claims] 1. A distance measuring means for measuring a distance by irradiating a visible light laser, a rotating means for rotating the distance measuring means around an axis perpendicular to an inner space section to be measured, and a rotating means. And a storage means for storing a distance measured by the distance measurement means corresponding to the rotation angle detected by the detection means. apparatus. 2. The apparatus according to claim 1, further comprising a sectional view calculating means for calculating and creating an inner sectional view based on the rotation angle and the distance stored in the storage means. 3. The inner space section measuring device according to claim 1, further comprising a sectional area calculating means for calculating an inner space sectional area based on the rotation angle and the distance stored in the storage means. 4. The apparatus according to claim 1, further comprising measuring means for measuring at least one of vertical and horizontal.
4. The apparatus for measuring an inner space section according to any one of claims 1 to 3. 5. The inner space section measuring device according to claim 1, further comprising timer means for operating a predetermined time and operating at an arbitrary time.