JPH01318503A - Monitoring device for aerial cable - Google Patents

Abstract

PURPOSE:To obtain an image with no variability of lightness even if pictures of any aspect around an aerial cable are taken by subjecting an objective part to sunlight collected through a condenser when the device body is run along the aerial cable and a camera is driven to take a picture of the aerial cable. CONSTITUTION:A device body 1 starts to run along an aerial cable (C), but, at the same time, a TV camera 4 operates to take a picture of a state of the outside of the aerial cable (C). At that time, two fiberscopes 5 and 5 take a picture of both sides of right and left of the aerial cable (C) in one picture, and it is recorded. In case of taking a picture, both sides of right and left of the aerial cable (C) consisting of a part of photographic subject are brightly lighted up uniformly by light collected through a sunlight condenser 7, and the difference in illumination of the surface of the aerial cable (C) caused by a lighting way of sunlight is reduced. According to the constitution, any pictures taken from any direction have no variability of lightness, and a clear composite picture can be obtained by the use of the TV camera 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an overhead cable monitoring device useful for inspecting optical composite overhead ground wires.

[Prior Art] Conventionally, methods for inspecting overhead power lines, overhead ground wires, etc. include a method in which a helicopter is flown and a supervisor visually observes the overhead cable from the air using binoculars, or a television camera is used to inspect the overhead cable. A known method is to monitor a model airplane by flying a model airplane and receiving video data captured by a television camera using a receiver on the ground.

[Problems to be Solved by the Invention] However, in any of the above methods, not only is the monitoring work itself complicated, but also the monitoring work itself is complicated, and it is also possible to avoid problems such as minute deformations on the cable surface, burn marks on the strands caused by lightning, etc., or breaks in the stranded wires. It was difficult to determine the detailed condition. Therefore, it was unsuitable for application to overhead cables such as optical composite overhead ground wires, which require stricter monitoring.

[Means for Solving the Problems] The present invention was provided to solve the above problems, and includes a device main body capable of self-propelled along an overhead cable;
The device includes a camera mounted on the main body of the device to photograph the overhead cable, and a lighting device to illuminate the area to be photographed by the camera, and the lighting device includes a light condensing device that collects sunlight, and a light concentrating device that collects sunlight. and a conductor device that guides the light collected by the device to the area to be photographed by the camera.

[Operations] In the present invention, the main body of the device is moved along the overhead cable, and the camera is simultaneously driven to photograph the overhead cable. At that time, the sunlight collected by the concentrator is applied to the area to be photographed by the conductor device.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

In FIG. 1, the reference numeral l indicates the main body of the apparatus, which can move freely forward and backward along the overhead cable C. Mounted above the neck of the device body 1 are a photographing device 2 for photographing the surface of the overhead cable C, and a lighting device 3 for illuminating the circumferential surface of the overhead cable C, which is the subject.

The photographing device 2 is an image recording device (video tape recorder)
A television camera 4 with an attached object and an objective section 5A.

Two fiberscopes 5.5 that transmit the image input to 5A to the eyepiece, and these two fiberscopes 5.
．． an image synthesis unit 6 for synthesizing the images transmitted to the eyepiece unit 5;
It is configured such that the image synthesized by the image synthesizing section 6 can be photographed by the television camera 4. The fiber scope 5 has a structure in which a lens is assembled to the end face of an optical fiber, and the objective parts 5A and 5A are arranged to point toward the right and left sides of the aerial cable C, and the eyepiece part is used for image synthesis. It is taken and incorporated into section 6.

The lighting device 3 also includes a solar light concentrating device 7 disposed on the upper surface of the exterior case of the image combining unit 6, and a conductor for guiding the light collected by the solar concentrating device 7 to the circumferential surface of the overhead cable C. It consists of a light guide (conductor device) 8.8.

As shown in Fig. 2, the sun/sunlight condensing device 7 is a combination of a concave mirror 9 and a convex mirror IO, so that parallel incident sunlight T is reflected by the concave mirror 9 and the convex mirror IO to efficiently concentrate it on one point. It is equipped with an adjustable posture so that it can be pointed in the direction of the sun when working.

In addition, the light guide 8.8 is connected to the light output part of the sunlight concentrating device 7 via the bifurcated branch 11, so that the light rays collected by the sunlight concentrating device 7 are transferred to the light guide 8.8 without wastage. It is now entered into These light guides8.
8 has the same structure as the optical fiberscope, and the light output end 8
A, 8A are arranged so as to point to the left and right sides of the overhead cable C, and the above-mentioned fiber scope 5.5
It is now possible to illuminate the area of the subject to be photographed through the camera.

In addition, the above device itself! In addition to the photographing device 2 and lighting device 3 described above, the device is also equipped with a control device for driving the main body 1 of the device, a receiver for remote control, and the like.

In order to inspect the overhead cable C using the monitoring device configured as described above, first, the device main body 1 is set on the overhead cable C so that the device main body 1 can run freely along the overhead cable C. Also, at this time, the sunlight condensing device 7 is directed toward the direction of the sun. Next, the supervisor sends a signal from a transmitter at hand to operate the main body 1 of the apparatus. Then, the main body 1 of the apparatus starts traveling along the overhead cable C, and the television camera 4 is activated to photograph the state of the outer surface of the overhead cable C.

At this time, the two fiberscopes 5.5 photograph the appearance of both the left and right sides of the overhead cable C on one screen and record it on the image recording device. In addition, when photographing, the left and right sides of the overhead cable C, which is the subject part, are brightly and evenly illuminated by the light collected by the sunlight condensing device 17, and the illuminance on the surface of the overhead cable C caused by the way sunlight hits difference is reduced. Therefore, there is no difference in brightness between the elephants captured from any direction, and a clear composite image can be obtained by the television camera 4.

After completing the work, the images photographed and recorded in this manner can be freely observed by taking out the recording medium from the image recording device and reproducing it at another location.

By the way, another possible means of illuminating the area to be photographed is to mount a light source and a battery to power it on the main body of the device, and use the light emitted by the light source to illuminate the area. Not only does this increase the weight of the object, but there is also concern about insufficient illuminance. On the other hand, when the sunlight condensing device 7 and the conductor device (light guide) 8 are used to illuminate the subject area with sunlight as in the present invention, the weight can be reduced, and Can be illuminated with high illuminance.

In the above embodiment, the external appearance of the overhead cable C can be observed by recording the video signal of the television camera 4 on the spot with an image recording device and reproducing the recording medium after the work is completed. However, the video signal from the television camera 4 may be wirelessly sent to a receiver at a remote location using a transmitter, and the captured image may be observed in real time.

In addition, in the above embodiment, the fiber scope 5 is
Although a case has been described in which the right and left sides of the overhead cable C are observed, if necessary, the number of fiber scopes 5 may be increased and the number of light guides 8 may be increased accordingly.

Further, in the above embodiment, the optical fiber type light guide 8 is used, but a combination of a lens and a prism, or a combination of a lens and a mirror may be used.

In addition, in order to efficiently collect sunlight regardless of the direction of incidence of sunlight, a mechanism is added to the solar concentrator 7 to automatically adjust its posture so that the concentrator 7 is always directed toward the sun. Alternatively, a plurality of light condensing devices may be arranged in different directions.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, since the part to be photographed is illuminated by the illumination device, an image without variations in brightness can be obtained no matter which surface around the overhead cable is photographed.

Therefore, when many surfaces are photographed simultaneously, images with no difference in brightness can be obtained, making comparative observation easier.

In addition, since the illumination is performed using sunlight collected by a concentrator, the illuminance of the subject area can be extremely high and a clear image can be obtained. Therefore, detailed inspection of the surface of the overhead cable is possible, which is particularly effective when monitoring something that requires strict inspection, such as an optical composite overhead ground wire. In addition, since it is illuminated by sunlight, there is no need for any other light source, so there is no need to mount a battery for the light source on the device itself, making the device lightweight, and there is no need for maintenance such as charging. be.

Furthermore, since sunlight is guided to the area to be photographed using the conductor device, any area around the overhead cable can be illuminated with sunlight.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing a device according to an embodiment of the present invention;
The figure is a cross-sectional view of the condensing device in the device of the same embodiment. C...Aerial cable! ...Device body, 2...Photographing device, 3...Lighting device,
4... Television camera, 7... Light collecting device, 8... Light guide (conductor device).

Claims (1)

[Claims] It has a device main body capable of self-propelled along an overhead cable, a camera mounted on the device main body for photographing the overhead cable, and a lighting device illuminating a portion to be photographed by the camera, and the lighting device comprises: 1. An overhead cable monitoring device comprising: a condensing device that collects sunlight; and a conductor device that guides the light collected by the concentrating device to a portion to be photographed by the camera.