JPH0727527A - Measuring method for long member of structure and device thereof - Google Patents

Abstract

PURPOSE:To concurrently satisfy a plurality of conditions such as high accuracy, a short time, a small number of people required, and a low cost by linearly moving a measured object within the measuring range by a photographic surveying system with a plurality of cameras. CONSTITUTION:Two or more solid image pickup element cameras 3 are installed, the measuring range 4 is limited by a photographic surveying system, and a measured object is linearly moved from a position 1 to a position 2 within the measuring range. The measured large coordinate values (Xp, Yp, Zp) of a point P after movement are calculated with the measured values (x1p, y1p, z1p), linear shift quantity L, displacement (DELTAY, DELTAZ), and rotation angle (DELTAalpha, DELTAbeta, DELTAgamma) of the solid image pickup element cameras 3. The measured object is linearly moved, the displacement and angle due to the shift are corrected, thus the whole shape is three-dimensionally measured. Many stations in the visual field of the solid image pickup element cameras 3 can be immediately measured in this method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for measuring three-dimensional shapes and scales of members of structures such as steel bridges, steel towers, steel frames, steel pipe structures and concrete bridges in a short time with high accuracy. It is about.

[0002]

2. Description of the Related Art Three-dimensional measurement is required to perform detailed shape inspection of a structure having a large number of measurement points. Conventionally, a steel tape measure, a contact-type measuring machine, a photographic machine, an angle measuring instrument, etc. have been used for such measurement. Among these measuring instruments, the steel tape measure is easy to handle, but it becomes impossible to perform three-dimensional measurement when the structure has a complicated shape. Moreover, the contact-type measuring machine can measure with high accuracy, but if the object to be measured becomes 20 to 30 m, it becomes a large-scale device, which requires a large capital investment. Further, in the measurement with a photographic machine, it is possible to measure multiple points at the same time, but since image analysis must be performed based on the film, post-processing is troublesome. In addition, recently, a machine for measuring with high accuracy by a gonio has been developed, but this requires a large amount of measurement time because it is necessary to collimate each point. For the above reasons, the length up to 20 has been
There was no effective means to efficiently measure a structure with a large number of 30m scale stations.

5 (a) and 5 (b) are perspective views of a long member of a steel bridge. The measuring points are bolt holes 28 on the left and right field joints,
These are the bolt hole 29 and the grade position 30 of the joint. In the past, there was no machine that could measure these many measurements with high accuracy and efficiency.

[0004]

As described above, in order to measure a structure having a large number of measuring points having a length of 20 to 30 m with a conventional measuring machine, high precision, short time, small number of people, and low number are required. The four conditions of cost cannot be satisfied at the same time. Therefore, the conventional method has a problem that there is no effective means for incorporating it into the measurement field for shape inspection.

[0005]

In order to solve the above problems, the present invention limits the range of measurement by the photogrammetry method using two or more solid-state image pickup device cameras, and sets the range so that the measurement range is within the range. The measurement object is linearly moved, and the displacement and angle associated with the linear movement are corrected so that the entire shape is three-dimensionally measured.

Further, a plurality of solid-state image sensor cameras are installed around the object so that the shape of the object to be measured can be three-dimensionally measured, and a ruler for calculating the linear movement amount of the object to be measured and the solid-state image sensor camera (special (Kaihei 4-278401) is installed, and a measuring device for a long member of a structure is configured by providing a displacement measuring machine and a tilt angle meter for measuring the displacement and angle of the object to be linearly moved. To do.

Further, according to the present invention, in order to prevent deformation when the object to be measured is linearly moved by the dolly, one pivot bearing is provided on one dolly and one pivot bearing is provided on the other dolly. Torsional rigidity with one suspension structure bearing installed to make a statically-determined structure with three-point support, and a ruler for calculating the linear movement of the DUT and a support point for the DUT just above the bearing. Use a high-closed transportation platform with a closed cross section. It should be noted that this transportation platform is a tool for advancing the original structure to be measured to the next step, and is also a part of the measuring device.

[0008]

As described above, according to the first to third aspects of the present invention, it is possible to immediately measure a large number of measurement points in the visual field of the solid-state image pickup device camera. Further, in the present invention, taking the example of the steel bridge, the measuring device can be incorporated in the production line so as to be directly connected to the front and rear processes such as welding and painting. Further, in the present invention, the solid-state imaging device camera is limited to the minimum necessary, so that the measurement field is limited to a small area, and the measuring device does not become large in scale, so that the cost is reduced.

[0009]

The embodiments of the present invention will be described below with reference to the examples, but the examples are merely for the purpose of explanation, and do not imply any limitation or limitation of the inventive idea.

FIG. 1 is a plan view for explaining the measuring principle of the first invention. In the figure, two or more solid-state imaging device cameras 3 are installed, the measurement range 4 is limited by a photogrammetry method, and when the DUT is moved to fall within the measurement range, It is assumed that the DUT 2 after the movement is obtained as shown in the figure. In this case, the measured large coordinate values (X _P , Y _P , Z _P ) of the point P after movement are the measured values (x _1p , y _1p , z _1p ) of the solid-state image sensor, the linear movement amount (L), If displacement (ΔY, ΔZ) and rotation angle (Δα, Δβ, Δγ) are used, the following formula 1 is obtained.

[Equation 1] As described above, in the measurement of the present invention, the object to be measured is linearly moved, and the displacement and angle associated with the movement are corrected to three-dimensionally measure the entire shape.

The second aspect of the present invention is shown in FIG.
In order to measure the shape of the DUT 6 in three dimensions.
The solid-state image sensor camera 3 (x_1p,
y_1p, z _1p4 units are installed at positions A to D, and the ruler
7 on the side of the carriage 14 that is integrated with the DUT.
It is provided for measuring the moving distance to read the scale of the ruler 7
Installed solid-state image sensor camera 8 (measurement of L in the above formula 1)
And the displacement and angle due to the linear movement of the DUT 6
Displacement measuring machine 9 to measure (ΔY, ΔZ, Δβ,
(Measurement of Δγ) and inclinometer 11 (measurement of Δα of the above formula 1)
A measuring device for a long member of a structure provided with is constructed. Na
Oh, these measuring devices are controlled by two computers 15.
To do.

Next, in the third invention of the present invention, as shown in FIGS. 3A to 3D, a pivot bearing 17 is provided at the center of the carriage 13 on the left side of the drawing, and on the carriage 13 on the right side of the drawing. Install the pivot bearing 17 and the hanging structure bearing 18,
A carriage 14 for a structure is provided in which a ruler 7 and a support 19 for the object to be measured are provided directly above the bearing.

FIG. 4 is a detailed view for explaining the structure of the support for the carriage. FIG. 4A is a side view of the suspension structure support. In the present invention, the bracket 22 connected to the carriage 14 is suspended from the beam 21 by the steel rod 23. Further, pivots 24 are installed above and below the steel rod 23, respectively. On the other hand, the pivot bearing 17 is attached to the bracket 22 as shown in FIG.
In addition, one pivot bearing 17 is installed in the center of the other carriage 13 (see FIGS. 3A and 3C).

[0014]

As described above, according to the first to third aspects of the present invention, it is possible to immediately measure a large number of measurement points in the visual field of the solid-state image pickup device camera. Further, in the present invention, taking the example of the steel bridge, the measuring device can be incorporated in the production line so as to be directly connected to the front and rear processes such as welding and painting. Further, in the present invention, the solid-state imaging device camera is limited to the minimum necessary, so that the measurement field is limited to a small area, and the measuring device does not become large in scale, so that the cost is reduced. Therefore, according to the present invention, it is possible to simultaneously satisfy the four conditions of high accuracy, short time, small number of people, and low cost in the measurement of a structure having a large number of measuring points with a length of 20 to 30 m. This has the effect of easily incorporating this measuring device into the manufacturing line.

[Brief description of drawings]

FIG. 1 is a plan view for explaining the measurement principle of the present invention.

FIG. 2 (a) is a plan view for explaining the measuring device of the present invention, FIG. 2 (b) is a plan view thereof, and FIG.
FIG.

FIG. 3 (a) is a plan view for explaining a carrier base of the present invention, FIG. 3 (b) is a side view thereof, and FIG.
3A is a sectional view taken along the line AA of FIG. 7A, and FIG. 4D is a sectional view taken along the line BB of FIG.

FIG. 4 (a) is a side view for explaining the structure of the support of the carriage according to the present invention, and FIG. 4 (b) is a sectional view taken along line CC of FIG.

5A is a perspective view showing an I-shaped cross-section member of a steel bridge, and FIG. 5B is a perspective view showing a box-shaped cross-section member of a steel bridge.

[Explanation of symbols]

1 Object to be measured before moving 2 Object to be measured after moving 3 Solid-state image sensor camera (CCD camera) 4 Measuring range of solid-state image sensor 5 Direction of movement of member 6 Object (member) 7 Ruler 8 Distance measurement Solid-state imaging device camera (CCD camera) 9 Displacement measuring machine 10 Laser beam 11 Tilt angle meter 12 Rail 13 Carriage 14 Carriage stand 15 Computer 16 Cable 17 Pivot support 18 Suspended structure support 19 Object support stand 20 Strut 21 Beam 22 Bracket 23 Steel bar 24 Pivot 25 Hexagon nut 26 Wheel 27 I-shaped cross-section member 28 Bolt hole of field joint part 29 Bolt hole of joint part 30 Mark position 31 Box-shaped cross-section member

Claims (3)

[Claims] 1. A range of measurement by a photogrammetry method is limited by using two or more solid-state imaging device cameras, and an object to be measured is linearly moved so as to be within the measurement range, and a displacement and an angle accompanying the linear movement are measured. A method for measuring a long member of a structure, which comprises correcting and measuring the whole shape three-dimensionally. 2. A plurality of solid-state image sensor cameras are installed around the object so that the shape of the object can be measured three-dimensionally, and a ruler and a solid-state image sensor camera for calculating the linear movement amount of the object are installed. In addition, a measuring device for a long member of a structure, which is provided with a displacement measuring machine and a tilt angle meter for measuring a displacement and an angle of the object to be measured which are linearly moved. 3. A static bearing structure is provided by installing one pivot bearing on one bogie, one pivot bearing and one suspension bearing on another bogie, and at the same time, to be measured. A structure transportation platform characterized in that a ruler for calculating the amount of linear movement of an object and a support point for the object to be measured are provided directly above the bearing.