JPH0687008B2 - How to measure the condition of wave-dissipating block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention provides an image obtained by remote imaging of an individual wave-dissipating block whose dimensions and shape are known and obtained by remote imaging, and an original image. In comparison, the present invention relates to a method for measuring the current situation.

(Prior Art) It has been widely practiced to install a breakwater block on the outside of a breakwater at the shore or at the mouth of a large river to protect the breakwater from a large storm. When the installation work of these wave-dissipating blocks is completed, measuring the finished shape (finished shape) is necessary for construction management, grasping the state of deformation over the years of inspection and acceptance, and grasping the state of deformation at the time of disaster. Is. Since the shape of the wave-dissipating block is complicated, direct manual measurement is highly dangerous. Therefore, it is desirable to perform mechanical measurement using sensors.

For this reason, it is also possible to suspend measurement equipment from a holding machine on the embankment with a device such as a crane, and sequentially measure while suspending the measurement equipment.

In this case, as shown in FIG. 6, the size of the slope / upper horizontal portion of the cross-sectional shape (cross-sectional shape perpendicular to the paper surface) of the whole portion 2 in which the wave-dissipating block is built up is measured as the distance from the embankment 1. be able to. That is, the sizes of Lx and Hy shown in the figure are measured from the front side of the embankment body 1 to the front side (toward the water surface) in order to know the cross-sectional shape at predetermined intervals.

(Problems to be Solved by the Invention) In the method shown in FIG. 6, although it is relatively easy to obtain the overall shape of the outer side of the wave-dissipating block, the state of the wave-dissipating block can be individually and accurately measured. It is often difficult to measure.

The object of the present invention is to improve the above-mentioned drawbacks, to obtain a state in which a wave-dissipating block is built up by an image, and to deform a known image until a coincidence point on the image with an object of known size and shape is obtained. An object of the present invention is to provide a measuring device that can obtain accurate measured values for individual wave-dissipating blocks from repeated data.

(Means for Solving the Problems) FIG. 1 is a diagram showing the principle configuration of the present invention. In FIG. 1, 2 is a built-up wave canceling block, 10 is an image pickup device, and 11
Is a first recording device, 12 is a second recording device, 13 is a data transformation control unit, which reads and transforms data stored in the second recording device, and 14 is a comparison and collation unit, which is an output of the data transformation control unit 13. Shows what is compared and collated.

The present invention has the following configuration. That is, an imaging device that images the built-up wave-dissipating block from above, a first recording device that stores an image from the imaging device, and a second recording device that stores an image of the size and shape of the wave-dissipating block in advance. A data transformation control unit that reads the second recording device and transforms the image data, and a comparison and collation device that compares the output of the data transformation control unit with the read data of the first recording device, With the comparison and collation device,
It is determined whether or not a match is obtained between the outputs of the first and second recording devices, and if a match is not obtained, a feedback signal is sent to the data transformation controller to perform data transformation control, and the results are compared and collated. By repeating the comparison and the collation, the deformation data of the data deformation control unit when a match is obtained, the distance from the image pickup device to the center of each built-up wave-dissipating block and the direction in which the ridge line is directed are determined. Configure by asking.

(Operation) The built-up wave-dissipating block 2 is imaged by the image-capturing device 10 from an upper position, and the data of the wave-dissipating block is stored in the first recording device 11. The dimensions and shape of the wave breaking block 2 are stored in the second recording device 12 in advance as image data. The data stored in the second recording device 12 is read out, and is initially passed through the data transformation control unit 13 to be input to one terminal of the comparison / collation unit 14. The data stored in the first recording device 11 is also read and input to the other terminal of the comparison / collation unit 14 to compare the two. Since the two data do not initially match, the data necessary for matching such as rotation / enlargement / reduction is returned to the data transformation control unit 13. The data transformation controller 13 transforms the data stored in the second recording device 12 based on the feedback data. The modified collation unit 14 compares the transformed data with the data of the first recording device 11 again. The transformation and comparison with the feedback data is repeated until matching / matching is obtained. The data of the data transformation control unit when the coincidence is obtained is the same as the data of the second recording device 12,
Since the data indicates rotation / enlargement / reduction, the distance and direction from the image pickup device 10 to the wave-eliminating block 2 can be known by calculating based on the data. Since the imaging position of the wave-eliminating block is known, the accurate position of the wave-eliminating block 2 with respect to the reference position can be known. If the processing is advanced for each wave-dissipating block, the detailed entire state of the wave-dissipating block 2 can be known.

(Embodiment) For recording data in the first recording device 11 in FIG. 1, for example, a camera is attached to the measuring carriage, only the camera is extended forward from the breakwater, and a picture of the wave-dissipating block is taken. Data of the position, orientation, and attitude of the camera at that time is obtained, and each data is stored together when the photographed image is taken into the recording device using the image scanner. A signal picked up by a TV camera may be A / D converted and similarly taken into the recording device.

FIG. 2 is a diagram showing a captured image, which is a first recording device.
11 stores the data obtained by A / D converting the image. On the other hand, in the second recording device 12, the three-dimensional shape of the wave-dissipating block as shown in FIG. 3A (top view) and B (side view) is displayed in wireframe and stored in wireframe data format. . By doing so, the deformation calculation can be easily performed.

The data transformation control shown in FIG. 1 and the comparison and collation device can both be processed by the microprocessor. FIG. 4 shows a processing flowchart at that time. The processing is executed in the order of steps indicated by circled numbers. When it is determined that the steps do not match, it is understood that steps 1 to 3 are repeatedly processed.

It is required to have the following capabilities to handle this screen matching.

(A) Find the ridgeline of the wave breaking block from the picture of the wave breaking block.

(B) Predict the reduction ratio and rotation angle of the basic wave-dissipating block so that the ridgeline of the photograph and the basic wave-dissipating block coincide with each other.

(C) Calculate the edge line of the basic wave-dissipating block having a given reduction ratio and rotation angle, and immediately plot it.

(D) Confirm that the ridgeline of the photograph matches the ridgeline of the basic wave-dissipating block that has undergone coordinate conversion.

(E) The center position and orientation of the wave-dissipating block are calculated from the reduction rate and rotation angle of the basic wave-dissipating block when they match.

And for (a), (b), and (d), (c),
Since higher performance is required as compared with (e), it is possible to end the processing at a low cost in a short time with the assistance of the operator.

Therefore, the flow of steps in FIG. 4 is specifically shown in FIG.

It should be noted that the data about the image that matched in the step of FIG. 4 is stored in the third recording device in the step. Then, the data should be compared when examining the presence or absence of secular change. With this processing, it is possible to obtain the center position of each block seen from the surface of the wave-dissipating block built up and the rotation angle data with respect to the reference posture. Also, if you measure with this method during the construction,
The state of internal blocks can also be recorded.

After this, if you make a plan view of the wave-dissipating block, a sectional view, a contour line, a three-dimensional bird's-eye view, etc.,
The state of the wave-dissipating block can be determined very clearly from various drawings, which can easily be processed by means of so-called computer graphic techniques.

Next, when checking the presence or absence of secular change, the processing shown in FIG. 4 is performed after a predetermined time has passed, and the data obtained at that time
Compare with the original data.

(Effects of the Invention) According to the present invention as described above, the state in which the wave-dissipating block has been built up can be photographed on site and can be measured by image processing in the office. In addition, of course, the overall condition after building,
The state of each wave-dissipating block can be easily and precisely known in a short time. The obtained results can be stored in a magnetic medium such as several floppy disks, do not require the storage of drawings as in the conventional case, and have a space saving effect.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention, FIG. 2 is a diagram showing an image taken by an image pickup device, FIG. 3 is a diagram showing images to be stored in advance, and FIGS. 4 and 5 are shown by an electronic computer. FIG. 6 is a diagram for explaining a conventional measuring method, which is an operation flowchart for processing. 2 ... Wave canceling block 10 ... Imaging device 11 ... First recording device 12 ... Second recording device 13 ... Data transformation control unit 14 ... Comparison / collation unit

Claims (1)

[Claims] 1. An image pickup device for picking up an image of a built-up wave-dissipating block from an upper position, a first recording device for storing an image from the image-pickup device, and a second device for storing an image of a size / shape of the wave-dissipating block in advance. A recording device, a data transformation controller that reads the second recording device and transforms the image data, and a comparison and collation device that compares the output of the data transformation controller with the data read by the first recording device. The comparison / collation device judges whether or not a match is obtained between the outputs of the first and second recording devices, and if no match is obtained, the feedback signal is subjected to data deformation control so as to perform data deformation control. The results are compared and collated by repeating the comparison and collation of the results, and the transformation data of the data transformation control section when a match is obtained is performed from the image pickup device to the center of each built-up wave-dissipation block. Distance and, and obtains a direction facing the ridge, the state measuring method wave dissipating blocks.