JPH0526963Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a method for observing distances around overhead wires to measure the distance between overhead wires such as high-voltage power transmission lines and objects to be observed such as buildings and trees in the surrounding area. Regarding machines.

(Prior art and its problems) For example, when a high-voltage power transmission line sways due to strong winds and hits surrounding obstacles such as buildings, trees, balls, etc.
Very dangerous. Therefore, it is necessary to maintain a certain distance or more between the high-voltage power transmission line and surrounding obstacles.

Therefore, conventionally, it has been confirmed whether the distance to the high-voltage power transmission line is appropriate from the top of the roof of a building near the high-voltage power transmission line or other obstacles, but in forests, mountains, and densely built areas, there are many obstacles. , It requires enormous cost and effort to carry out the confirmation work each time by on-site measurement.

On the other hand, distances have also been measured using aerial photographs, but there are problems in that they are expensive and it is difficult to accurately measure the distance between high-voltage power transmission lines and obstacles.

(Purpose of the invention) In view of the above-mentioned conventional problems, the present invention takes pictures of the front and sides of a vehicle moving along overhead lines such as high-voltage power transmission lines, and measures the traveling distance and the front and sides. It is an object of the present invention to provide a distance observation device around overhead wires that can accurately detect the distance to obstacles (objects to be observed) such as buildings around overhead wires from a photographing angle.

(Means for Solving the Problems) In order to solve the above conventional problems, the present invention provides a traveling vehicle 22 that is suspended from an overhead wire 3 and moves along the overhead wire 3. It is equipped with an odometer 23 that measures the distance traveled, a front camera 26 that photographs the front, and a side camera 27 that photographs the side. A configuration is adopted in which a vertical axis A and a horizontal axis B having angle display scales C and D are visible.

(Function) In the above configuration, the traveling vehicle 22 is driven along the overhead wire 3, the distance traveled is measured by the odometer 23, and the buildings etc. around the overhead wire 3 are photographed by the front and side camera cameras 26, 27. , (a) TV screen captured by the front camera 26 (Fig. 7)
"The inclination angle α ₁ of the vertex P of the object to be observed (tree) 60" read from (b) TV screen captured by the side camera 27 (Fig. 8)
``The inclination angle α <sub>2</sub> of the apex P of the observed object 60 when the vertical axis A coincides with the observed object 60'' read from ``(c) ``Both observation points L ₁ '' measured by the odometer 23 , _L2 , and the distance d from to the object to be observed 60, such as a specific building, photographed can be calculated with great difficulty.

(Example) An example of the present invention will be described based on the drawings. As shown in FIG. 1, this embodiment relates to a high-voltage power transmission line circumference distance observation device 2 that observes the surrounding area of high-voltage power transmission lines stretched between steel towers 1.
Existing overhead ground wire 3 that is not used for power transmission between
(Ground wire).
It is moved by a self-propelled towing vehicle 4 that is also suspended from the overhead ground wire 3.

As shown in FIGS. 2 and 3, the self-propelled towing vehicle 4 has a pair of wheels 6 mounted on an overhead ground wire 3.
and a frame 7 that rotatably supports both wheels 6.
and a drive motor 8 disposed on the frame 7, a drive chain sprocket wheel 9 for the motor 8, an idle chain sprocket wheel 10 rotatably supported on the frame 7, and a drive chain sprocket wheel 9 for each wheel 6. An endless chain 12 is wound around the attached sprocket wheel 11, and both wheels 6 are rotated through the chain 12 by the drive of the motor 8, so that the tow vehicle 4 can be driven by itself. I'm starting to be able to do it.

A balance frame 14 is suspended from the frame 7 via the support shaft 13, and the balance frame 14
A storage box 15 containing a battery, timer, control device, etc. is fixed to the lower end of the box. A horizontal rod 17 is arranged between the vertical rods 16 hanging from the front and rear ends of the frame 7, and a detection switch 18 and a detection bar 19 for detecting an object to be observed are arranged at the front end of the horizontal rod 17. Towing hook 2 at the rear end of 17
0 is installed.

As shown in FIGS. 2 to 4, the observation device 2 is suspended from an overhead ground wire 3.
A traveling vehicle 22 moving along the road and an odometer 23
Distance meter box 24 with built-in, battery,
An observation device box 25 containing a mileage storage unit, a photographing/recording unit, a control unit, etc., and one forward camera 26
and an attitude adjustment device 28 in which two side photographing devices 27 are installed. ing.

The traveling vehicle 22 has almost the same structure as the towing vehicle 4 described above, except that it does not include the motor 8, etc.
A pair of wheels 31 placed on the overhead ground wire 3, and a frame 32 that rotatably supports both wheels 31.
and a horizontal rod 34 disposed between the vertical rods 33 hanging from the front and rear ends of the frame 32, and a hook 35 attached to the front end of the horizontal rod 34 is attached to the connecting rod 36.
It is connected to the towing hook 20 of the tow vehicle 4 via.

The distance meter box 24 is fixed to the lower end of the vertical rod 33, and the distance meter box 24 is a built-in odometer 23.
An endless belt 40 is wound around the pulley 38 attached to the rear wheel 31 and the pulley 39 attached to the rear wheel 31.
A tension pulley 41 supported by the belt 40 is pressed against the belt 40 by a spring. Therefore,
When the wheel 31 rotates, the distance traveled is measured by the odometer 23.

The posture adjustment device 28 includes a pair of upper and lower horizontal support plates 28A and 28B that are parallel to each other, an extendable connecting member 28C that connects the four corners of the horizontal support plates 28A and 28B, and a lower horizontal support plate 28B. The lower end of each connecting member 28C is connected to the lower horizontal support plate 28B via a universal joint 65 such as a ball joint, and the upper end screw portion is connected to the lower horizontal support plate 28B through a universal joint 65 such as a ball joint. It has a connecting rod 67 that is screwed into a nut 66 fixed to the horizontal support plate 28A, and by appropriately operating a knob 68 integrally formed in the center of each connecting rod 67, each connecting rod can be adjusted. The upper end screw portion 67 is moved in and out of the nut 66, thereby allowing the lower horizontal support plate 28B to be placed in a horizontal state while looking at the level 45.

Each of the photographing devices 26 and 27 has support frames 26A and 27 fixed to the lower surface of the lower horizontal support plate 28B.
A, a camera body 26B rotatably supported by its support frames 26A and 27A via a horizontal shaft 43,
27B, a tilt protractor (not shown) disposed on the side of the camera bodies 26B, 27B to display the tilt angle of the camera bodies 26B, 27B, and It is composed of a fixing jig (not shown) that fixes the tilt angle.

In this embodiment, a video camera is used as the camera body 26B, 27B, and a vertical axis and a horizontal axis are drawn on the lens, and a long line serving as a scale for displaying the shooting angle is drawn on each axis at 5° intervals. Short lines are drawn alternately. Therefore, when the video film is reproduced on a television screen, a vertical axis A, a horizontal axis B, and a long line C and a short line D serving as a scale for displaying the shooting angle appear on the television screen, as shown in FIGS. 7 and 8. A mileage display section 44 for displaying the mileage of the vehicle 22 is provided at the upper right of the television screen.

The observation device box 25 includes a bottom plate portion 25A,
Box body 25B placed over the bottom plate portion 25A
and a plurality of connecting fittings 46 that connect the box body 25B to the bottom plate portion 25A.

The connecting device 29 is constructed as follows. That is, as shown in FIGS. 5 and 6, the upper board 48 is bolted to the lower surface of the rangefinder box 24 and the lower surface of the observation instrument box 25, and the upper substrate 48 is bolted to the upper surface of the observation instrument box 25 and the upper surface of the attitude adjustment device 28. The lower board 49 is bolted, the engagement frames 50 and 51 are fixed to each board 48 and 49, and the T-shaped fitting 52 is horizontally inserted into the upper engagement frame 50. It is fixed to the upper substrate 48 with fixing screws 53, inserting the bifurcated metal fitting 54 into the lower engagement frame 51, and fixing the inserted bifurcated metal fitting 54 to the lower engagement frame 51 with the fixing screw 55,
The bifurcated metal fitting 54 and the T-shaped metal fitting 52 are rotatably connected by a connecting shaft 56, and a retaining pin 57 is engaged with the connecting shaft 56. Both metal fittings 52 and 54 have
In order to prevent the coupling device 29 from moving unexpectedly during the suspension operation, a temporary fixing pin hole 59 is provided for inserting a temporary fixing pin 58 shown in FIG. 6. Note that the connecting shaft 56 of the upper connecting device 29 and the connecting shaft 56 of the lower connecting device 59 are at 90 degrees to each other on the horizontal plane.
It's out of place. In addition, the observation device 2 and the traveling vehicle 22
and distance meter box 24, and observation device box 25.
The reason why it is divided into three parts, the attitude adjustment device 28, and the photographing devices 26 and 27, is to make it easier to transport and to enable the photographing devices 26 and 27 to always maintain a horizontal state.

A method for observing distances around power lines will be explained. First, as shown in FIG. 2, the camera body 26B of the front camera 26 is tilted at a predetermined angle θ ₁ (for example, 45 degrees) with respect to the horizon A. Also, as shown in FIG. The camera body 27B is tilted at a predetermined angle θ ₂ (for example, 30°) with respect to the vertical line.Next, as shown in FIG.
The observation aircraft 2 is moved along the overhead ground line 3. The images photographed by each of the photographing devices 26 and 27 are recorded on a video tape in the photographing and recording section in the observation device box 25. Further, the distance traveled by the observation device 2 is measured by the odometer 23, and the measured value is recorded on a videotape via a distance storage section in the observation device box 25.

Next, either collect the videotape above or use Observation Machine 2.
A video signal is wirelessly transmitted from the station to the ground, and the video is played back using a magnetic recording and playback device. FIG. 7 shows a video screen that reproduces an image photographed by the front camera 26, and FIG. 8 shows a video screen that reproduces an image photographed by the side camera 27.

For example, when measuring the distance to the vertex P of the tree 60 shown in FIG. 1, the inclination angle α 1 of the vertex P of the tree 60 is read from the television screen of FIG. 7 in the solid line state of FIG. ₁ . In this case, since the vertex P of the tree 60 coincides with the horizontal axis B, α ₁ =θ ₁ . At the same time, the mileage display section 44 reads the mileage _L1 .

Next, the observation device 2 reaches the position shown by the imaginary line in FIG. 1 and reads the inclination angle α ₂ of the vertex P of the tree 60 when the vertical line A on the television screen in FIG. 8 coincides with the tree. In this case, since the vertex P of the tree 60 coincides with the long line C that is 10 degrees upward from the horizontal axis B,
This means that α ₂ =θ ₂ +10°. At the same time, the mileage display section 44 reads the mileage _L2 .

The above conditions are illustrated in FIGS. 9a to 9c. The travel distance L of the observation aircraft 2 is expressed by the following equation.

L=L ₂ −L ₁ ...(1) Vertical distance H from observation device 2 to vertex P of tree 60
is expressed by the following equation.

tanα ₁ =H/L H=tanα ₁ L (2) Next, the horizontal distance l from the observation device 2 to the vertex P of the tree 60 is expressed by the following equation.

tanα ₂ =l/H l=tanα ₂ H (3) Furthermore, the shortest distance d from the observation device 2 to the vertex P of the tree 60 is expressed by the following equation.

Sinα ₂ =l/d d=l/Sinα ₂ (4) In this example, the slope and sag of the overhead ground wire 3 are ignored.

In the above embodiment, the observation aircraft 2 is towed by the towing vehicle 4, but it may be self-propelled.

In order to further improve the measurement accuracy, the observation device 2 may be moved back and forth, and the measured values obtained by the back and forth movements may be averaged. In this case, measurement accuracy improves in proportion to the square of the number of measurements.

Furthermore, if the camera units 26 and 27 shake due to wind or vibrations caused by the towing vehicle 4 during observation, measurement errors may occur.
The shaking angles of the camera devices 26 and 27 may be detected from the shaking angle of the reproduced video, and the predetermined angles θ ₁ and θ ₂ may be corrected based on the detected angles. In addition, a swing angle detector is provided on the lower horizontal support plate 28B, and the camera 2
Detect the swing angles of 6 and 27, and use the detected values as the 7th
The image is displayed on the television screen shown in FIGS. 7 and 8, and a camera is installed to take a picture of the level 45, and the image is projected in a small size on the television screen shown in FIGS. 7 and 8. and a predetermined angle θ ₁ .
θ ₂ may be corrected.

(Effects of the invention) According to the overhead wire circumference distance observation device of the present invention, by observing images from the front camera and side camera, not only can the object to be observed be directly visually confirmed, but also the images can be used. By referring to the traveling distance detected by the odometer, the distance to the object to be observed can be accurately detected.

In addition, the above calculation can be performed using only comparatively inexpensive front and side photographing devices, and there is no need to use an expensive light wave or acoustic range finder, which is economical.

Moreover, while viewing the image, you can simultaneously check the distance to the object being observed, and since the two always match, there is no need for a computer or the like to match the two. It is economical and the entire device can be downsized.

Furthermore, it is ideal for observation in densely built areas or mountainous areas, and can significantly reduce costs and labor compared to conventional observation methods.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a schematic perspective view showing the state in which the observation aircraft is being observed by moving it along an overhead ground line; Fig. 2 is a schematic perspective view of the observation aircraft and the towing vehicle. Side view, Figure 3 is the same front view, Figure 4
The figure is a rear view of the same, Figure 5 is a vertical cross-sectional view of a coupling device that is a part of the observation aircraft, Figure 6 is a view taken in the direction of the − arrow in Figure 5,
FIG. 7 is a television screen taken by a front photographing device, FIG. 8 is a television screen taken by a side photographing device, and FIGS. 9 a to 9 c are explanatory diagrams showing a method of measuring the distance to the top of a tree. 2... Transmission line surrounding distance observation device, 3... Overhead ground wire (overhead line), 4... Self-propelled towing vehicle, 22... Traveling vehicle, 2
3...Odometer, 26...Front camera, 27...
...Side camera, A...Vertical axis, B...Horizontal axis, C
... long line (scale for displaying shooting angle), D... short line (scale for displaying shooting angle).

Claims (1)

[Scope of utility model registration request] A traveling vehicle is provided that is suspended from an overhead wire and moves along the overhead wire, and the traveling vehicle is provided with an odometer that measures the distance traveled, and a forward camera that photographs the front.
A distance observation device around overhead wires, which is equipped with a side camera for photographing the side, and a vertical axis and a horizontal axis having a scale for displaying the photographing angle are reflected in images taken by both cameras.