JP3994383B2 - Vertical position specifying device and vertical position specifying method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus and a method for positioning a vertical point lowered from an upper base point to a lower place. In particular, the present invention relates to an apparatus and method particularly effective for positioning on the bottom of a lake such as a dam.
[0002]
[Prior art]
In architecture, a so-called down swing device is used to measure the vertical of columns and walls, or to measure the vertical point of a lower place such as a floor using a certain upper point as a reference point. This downward swing is composed of at least a weight and a so-called water thread for suspending the weight, and is also disclosed in, for example, Japanese Patent Application Laid-Open No. 07-098226.
[0003]
In addition to the construction of large-scale buildings, this mechanism for lowering swings is often used to determine the reference position of the bottom of a lake such as a dam. That is, a weight hung with a long wire from a predetermined reference point on the water is suspended to the bottom of the underwater. The weight suspended in water swings like a pendulum, gradually reducing the swing, and finally pointing in the vertical direction from the reference point on the water. At that time, the diver checks the vertical position at the bottom of the lake, which is indicated by the weight while diving into the bottom of the lake.
[0004]
However, if the bottom of the water is too deep, not only the danger of divers increases, but also the problem is that it takes time for the shaking to settle due to the long wire.
[0005]
Moreover, since the air exhaled from the diver rises along the wire that suspends its weight, the wire is affected by the air, and not only the swaying once tried to settle but also the disturbed swaying is irregular Therefore, there is a problem that it is difficult to confirm the vertical position. In particular, it can be said that it is extremely difficult for a diver to check the vertical position in mm units, and there is a problem in that high-precision construction is hindered.
[0006]
[Problems to be solved by the invention]
This invention is made paying attention to such a problem, and it aims at providing the new apparatus and method for pinpointing the vertical position in the bottom of water under high accuracy other than large-scale construction. Is.
[0007]
[Means for Solving the Problems]
According to the present invention, an apparatus for specifying a vertical position from a reference point by a weight suspended by a wire so as to be swingable, and photographing a vertical direction so as to swing integrally with the weight. An imaging means for indicating, a pointing means for indicating a vertical position in a video area imaged by the imaging means, and a remote display means for displaying an image by the imaging means at a remote position Is a vertical position specifying device characterized by
[0008]
As a result, the vertical direction can be observed and specified on a remote screen, so there is no danger to the diver because there is no need to position the diver by dive, especially in the water. Since the weight is not hindered by the exhaled breath, positioning can be performed with high accuracy. Further, since the center position can be determined from the magnitude of the shake of the weight even if the shaking does not stop, the operation for determining the vertical position can be performed relatively quickly.
[0009]
Preferably, the photographing means is a camera fixedly installed in the hollow of the weight. With this structure, the center of gravity can be brought to the center of the weight, and vertical shooting with a camera becomes easy.
[0010]
Further, in order to easily identify the vertical position in the photographed video, the instruction means displays a reference point indicating the vertical position on the video photographed by the photographing means, or in the vertical direction. It is preferable to irradiate with spot light and indicate that the illuminated portion is in a vertical position.
[0011]
A base with a scale in the vertical direction is installed close to the photographing means. Thereby, the vertical position can be confirmed with higher accuracy. Further, even if the weight swing does not stop, the vertical position can be determined or determined from the swing trajectory on the base projected by the photographing means.
[0012]
The remote display means is a transmission means for transmitting the image data from the photographing means and a monitor means installed for displaying the transmitted data, and the transmission means goes to the water along the wire. It is characterized by being an extended transmission cable or a wireless transmission / reception device.
[0013]
Further, according to the present invention, there is provided a method for specifying a vertical position from a reference point by a weight suspended by a wire so as to be able to swing, wherein the vertical position is photographed by swinging integrally with the weight, The vertical position specifying method is characterized in that a vertical position in a photographed video area is indicated and an image at the indicated vertical position is displayed at a remote position.
[0014]
Preferably, the photographing is performed by a camera fixedly housed in a weight.
[0015]
Also, the captured video data is transmitted wirelessly or wired to a water monitor device.
[0016]
Further, showing the reference point representing the vertical position in the captured image makes it easy to identify the vertical position.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0018]
As shown in FIGS. 1 and 2, a bracket 20 is provided on the water surface S of the dam so as to protrude from the foundation 21. One end of the wire 1 is fixed to the bracket 20. The position fixed to the bracket 20 is a reference point P for specifying the vertical position of the bottom of the underwater W.
[0019]
The base 3 is placed on the lake bottom B so as to be positioned in the vertical direction of the reference point P. A weight 2 is attached to the other end of the wire 1, and as shown in FIG. 2, the weight 1 is attached to the underwater W by the wire 1 so that the weight 2 can be slightly separated from the base 3 and swing on it. Is hung.
[0020]
As shown in FIG. 3, the weight 2 is a hollow 2a in which the camera 4 is housed and fixed. The camera 4 is preferably a camera capable of taking a moving image by a CCD or the like, but is not limited thereto.
[0021]
The camera 4 is configured such that the lens 4a is directed toward the base 3 when the weight 2 is hung so that the base 3 can be photographed. In a direction opposite to the direction in which the lens 4a is directed, the data transmission cable 5 extends from the camera 4 to the outside through the inside of the weight 2 so that the image data captured by the camera 4 can be transmitted to the ground. Yes.
[0022]
The transmission cable 5 extends to the water along the wire 1 and is connected to a monitor 7 such as a television set further on land from the bracket 20 so that an image taken by the camera 4 is projected on the monitor 7. ing.
[0023]
In this example, video data is transmitted by wire, but data transmission using so-called wireless may be used. That is, a wireless transmission device is installed on the weight 2, and a wireless reception device is installed on one monitor 7. Then, the data photographed by the camera 4 is transmitted from the wireless transmission device to the wireless reception device, and the video is displayed on the monitor 7. This transmission / reception device may be any device as long as it does not interfere with wireless transmission / reception and specification of the vertical direction by the weight 2.
[0024]
The base plate 3 has a plurality of grid-like vertical and horizontal lines 3a and 3b shown at equal intervals on one flat surface, and can be used as a scale for positioning. The interval between adjacent lines is in mm units in this example so that the vertical position can be accurately determined, but is determined as appropriate according to the required accuracy.
[0025]
A transparent or translucent plate 6 is placed at the tip of the weight 2 so as to face the lens 4 a of the camera 4. Coordinate axes 6a and 6b of vertical and horizontal crosses are engraved on the plate 6, and the scales 6a and 6b are displayed on the video together with the image taken by the camera 4. The coordinate axes 6a and 6b are graduated at equal intervals.
[0026]
The intersection Op of the scales of the coordinate axes 6a and 6b displayed in the image is designed to indicate the position of the lake bottom just vertical from the reference point P of the wire 1 supported by the bracket 20 when the weight 2 is hung.
[0027]
FIG. 6 is a schematic diagram of the base 3 and the crosshairs 6a and 6b projected on the monitor 7 by the camera 4. Immediately after the weight 2 is hung, the weight 2 performs a pendulum motion on the base 3 as shown in FIG. 2, and the intersection Op of the coordinate axes 6 a and 6 b on imaging sweeps on the base 3. The magnitude of the movement gradually converges and decreases, and eventually stops. At this time, the point indicated by the intersection Op on the base 3 is a point that is lowered from the reference point P determined on land to the base 3 in the vertical direction. Therefore, the vertical position of the lake bottom B can be specified by reading this vertical point from the scales 3a and 3b of the base 3. Moreover, as running the center of the base 3, vertical, horizontal intersection O _S of a single thick line, each by indicating its center, to facilitate a particular position on the base 3.
[0028]
Even when the bottom of the water is deep and the weight does not stand still, the base 3 with grids in the vertical and horizontal directions is effective, and the vertical position is determined from the trajectory and the swing width of the weight on the base 3. What should I do?
[0029]
In this example, the cross coordinate axis in front of the camera 4 is used. However, the cross coordinate axis may be mechanically or electrically provided in the camera 4 itself so that the cross coordinate axis can be displayed.
[0030]
Further, a spot light directed in the vertical direction is projected from the tip of the weight 2 onto the base 3 by a laser or the like, and the vertical position is specified or calculated from the spot or locus of the spot projected on the screen of the monitor 7. Good.
[0031]
【The invention's effect】
As described above, according to the present invention, a camera is attached so as to be swingable integrally with the weight of the swinging swing, and an image in the direction of the vertical position is captured by the camera. Then, the imaging data of the camera is transmitted to a display device such as a remote monitor. Further, a coordinate point or spot-shaped irradiation light indicating the vertical position is displayed when the weight is just stopped so as to be superimposed on the photographed image. A base with a scale is placed at the vertical position, and the vertical position can be accurately measured.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a state in which a swing swing according to the present invention is lowered to the bottom of the water.
FIG. 2 is a perspective view showing a state in which a camera-equipped weight 2 swings (indicated by an arrow) on a base 3. FIG.
FIG. 3 is a cross-sectional view of a weight 2 with a camera.
FIG. 4 is a base 3 graduated in a lattice shape.
FIG. 5 is a coordinate axis of a cross projected by a camera.
FIG. 6 is an example of an image projected by a camera.
[Explanation of symbols]
1. . . Wire 2. . . Weight 3. . . Base 4 . . Camera 5. . . Transmission cable6. . . 6. Transparent or translucent plate . . monitor

Claims (12)

A device for specifying a vertical position from a reference point by a weight suspended by a wire so as to be swingable,
Photographing means for photographing the vertical direction by swinging integrally with the weight;
Instruction means for indicating a vertical position in a video area photographed by the photographing means;
Remote display means for displaying the image by the photographing means at a remote position;
A vertical position specifying device comprising: The vertical position specifying device according to claim 1, wherein the photographing unit includes a camera installed in a hollow of a weight. 2. The vertical position specifying device according to claim 1, wherein the instruction unit projects at least a point indicating the vertical position on the image captured by the imaging unit. 2. The vertical position specifying apparatus according to claim 1, wherein the instructing means emits spot light in a vertical direction. The vertical position specifying device according to claim 3 or 4, wherein the pointing means further includes a base placed in the vertical direction and close to the photographing means, and the base is provided with a grid-like scale. apparatus. 2. The vertical position according to claim 1, wherein the remote display means includes transmission means for transmitting image data from the imaging means and monitor means installed for displaying the transmitted data. Specific device. The vertical position specifying device according to claim 6, wherein the transmission means includes a transmission cable extending along the wire to the water. The vertical position specifying device according to claim 6, wherein the transmission unit includes a wireless transmission / reception device. A method for identifying a vertical position from a reference point by a weight suspended by a wire so as to be swingable,
It swings integrally with the weight to photograph the vertical direction, shows the vertical position in the photographed image area, and displays the image of the indicated vertical position at a remote position. Vertical position identification method. The vertical position specifying method according to claim 9, wherein the photographing is performed by a camera fixedly housed in a weight. The vertical position specifying method according to claim 9, wherein the photographed video data is transmitted wirelessly or by wire to a monitor device on water. The vertical position specifying method according to claim 9, wherein the vertical position indicates a reference point indicating the vertical position in the captured image.

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