JPS6085303A - Measurement of distance between overhead power transmission line and body in close proximity - Google Patents

Abstract

PURPOSE:To facilitate measurement, by attaching a camera, whose focal distance is determined, on a running vehicle, which runs on an overhead power transmission line, taking a picture of a body in the close proximity, and measuring the distance between them based on the film. CONSTITUTION:A driving roller 1 of a running vehicle A is rotated by a motor 2 through a belt 3 and moved along a power transmission line C. A disk cam 6 with a protruded part 6a is attached on the same axis of a running roller 5 of the vehicle A. The tip part of a release 7 is fixed to a seat 9 directly beneath the cam 6. A camera 10 having a built-in automatic winding mechanism is attached under the vehicle A. A shutter button 8 can be depressed by the protruded part 6a. The button 8 is depressed automatically at every one turn of the cam 6 and the body in the close proximity of the wire C can be continuously photographed. Therefore the area, which can not be measured so far, can be simply measured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the distance between an overhead power transmission line and a nearby object near the overhead power transmission line.

If a nearby object such as a tree near the overhead power transmission line, particularly along the line, comes too close to the overhead power transmission line, it may cause a ground fault. For this reason, conventional methods have been to periodically measure the distance between overhead power lines and approaching objects such as trees along the line, and to remove branches and leaves from trees that are too close to the overhead power lines. However, it takes a lot of effort and a long time to measure the distance between an overhead power transmission line and nearby objects in its vicinity over the entire overhead power transmission line, and furthermore, the separation caused by transit Since distance measurement is limited to areas where both overhead power lines and nearby objects can be seen, there are many drawbacks, such as being unable to measure in mountainous areas or densely wooded areas. was made in view of the above points, and an embodiment illustrating this will be explained below. Fig. 1 is an explanatory diagram showing an embodiment of the method of the present invention, and in the figure, 1 is a rotatable member attached to a traveling vehicle A. The driving reeler 1, which is a shaft-supported driving roller, rotates via a motor 2 driven by a power source 4 and a belt 3, and causes the traveling vehicle A to travel along the power transmission line -〇. Reference numeral 5 denotes a running roller that is rotatably fixed to the running vehicle A, and 6 is a protrusion 6 that is coaxially attached to the running roller 5 and attached to one side thereof.
A disc cam having α, 7 is a release, the tip of the release 7 is fixed to a pedestal 9 provided directly below the disc cam 6, and every time the disc cam 6 rotates, the protrusion 6α of the disc cam 6 The shutter button 8 of the release 7 is pressed when the olo is a camera with a built-in automatic winding mechanism attached to the vehicle A facing downward or diagonally downward. Set at a dangerous distance from nearby objects (for example, 1m to 15m) with respect to the electric wire O, and as shown in the figure, drive the traveling vehicle A over the overhead power transmission line 0 (or over the overhead ground wire) using the driving roller 1 and the traveling roller 5. The protruding portion 6α of the disk cam 6 that is suspended and self-propelled through the span of the steel tower by a motor drive rotates together with the traveling roller 5.
The shutter button 8 of the camera 10 is automatically pressed via the release 7 to continuously photograph nearby objects along the overhead power transmission line, and the photographed developed film selects the dangerously close nearby objects from the high-definition photographs. Measure and detect their positions and the distances between them. FIG. 2 is an explanatory diagram showing another embodiment of the method of the present invention. As shown in the figure, a microswitch 11 is provided directly below the disk cam 6, and the microswitch 11 is activated by the protrusion 6α of the rotating disk cam 6. Let me, disk cam 6
The number of rotations of the camera 10 is counted by the counting counter 12, and when the value of the counting counter 12 reaches the value α set in advance in the first preset counter 13, the shutter button 8 of the camera 10 is pressed. A solenoid 15 installed on the top operates every rotation period of the disk cam 6 to control the camera 1.
0 shutter button 8 is pressed to continuously photograph nearby objects along the overhead power transmission line at predetermined intervals, and the numerical value of the counting counter 12 operated by the disc cam 6 is set in advance in the second preset counter 14. The operation of the solenoid 15 can be automatically stopped when the value of the first preset counter 13 (a-) b) is reached, and adjacent objects within a certain section below the power transmission machine are continuously photographed. Then, the position and distance of an approaching object within the dangerous range approaching the power transmission line 0 is measured and detected using the developed film photographed as described above. There are still cameras 10 on each side of vehicle A.
Or, by installing a plurality of cameras 10 with different focal lengths on the vehicle A facing downward or diagonally downward, the position of the overhead power transmission line and nearby objects along the line can be determined. It is also possible to accurately measure the separation distance over a wide range.

According to the method of the present invention, as described above, the camera 10' with a fixed focal length is directed downward to the vehicle A that is self-propelled on the overhead power transmission line.
It is installed facing diagonally downward, etc., and automatically photographs nearby objects near overhead power lines at predetermined intervals, and uses the photographed film to measure the positions of approaching objects within the danger range and the distances between them, making it possible to avoid overhead power transmission. Not only can it quickly and accurately measure nearby objects that come dangerously close to power lines and their positions across the entire overhead power line, but it can also easily and accurately measure areas that could not be measured previously. 0 with advantages

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the method of the present invention, and FIG. 2 is an explanatory diagram showing another embodiment of the method of the present invention. A: Drive roller 2: Motor 3: Belt 4: Power supply 58 Travel roller 6! Disc cam 72 release 8; shutter button 9: pedestal 1 (l camera

Claims (1)

[Claims] A camera with a fixed focal length is attached to a vehicle running on an overhead power transmission line, photographs nearby objects near the overhead power transmission line at predetermined intervals, and measures the distance between them from the photographic film. A method for measuring the distance between an overhead power transmission line and a nearby object.