JP2942007B2 - Overhead wire inspection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead line inspection apparatus capable of detecting scratches or breaks in an overhead line and capturing an image of the damaged portion with a camera.

[0002]

2. Description of the Related Art Since overhead power transmission lines, overhead ground wires, and the like are often laid at high places such as mountainous regions, lightning strikes may melt or melt wires. In addition, an overhead transmission line or the like may be damaged or broken by a long-term use. If such damage is left unchecked, it may cause a reduction in power transmission efficiency and the occurrence of radio interference due to corona discharge.

[0003] Therefore, recently, an inspection device is mounted on an overhead line, and the inspection device is run on the overhead line to detect a scratch or a break in a wire of the overhead line, and an image of the damaged portion is taken by a camera. I have to. That is, this type of inspection apparatus captures images of a traveling roller engaged with an overhead wire, a coil holder in which a plurality of flaw detection coils are arranged concentrically and through which the overhead wire passes, and a damaged portion of the overhead wire. An imaging unit including a camera. Then, by causing the inspection device to travel on the overhead wire with the traveling roller, each of the flaw detection coils electromagnetically generates an eddy current in the overhead wire, detects a damaged portion, and detects the damaged portion in the imaging unit. Image.

FIG. 7 is a configuration diagram of a conventional imaging unit. In FIG. 7, reference numeral 2 denotes a substantially square main body mounting plate. The main body mounting plate 2 has an electric wire introduction groove 2a formed from one side toward the center, and the overhead wire 1 is introduced into the center of the main body mounting plate 2 through the groove 2a. One end of each of frames 3a to 3d made of an L-shaped rope is fixed to each corner of the main body mounting plate 2. A camera 4 for photographing is arranged near the upper frame 3b. The camera 4 is stored and fixed in a camera holder 5 obliquely downward, and the camera holder 5 is fixed to a fixing plate 7 via a bracket 6.
The fixing plate 7 is bolted to the frame 3b. Camera 4
A flat mirror 8 is disposed diagonally below. This plane mirror 8
Is fixed on a fixed block 9, and the fixed block 9 is fixed to one end of a support plate 10. The other end of the support plate 10 is bolted to the lower frame 3c.

On the other hand, a V-shaped reflecting mirror 11 is disposed diagonally above the overhead line 1. The reflecting mirror 11 is fixedly supported by a lower end of a bracket 12, and an upper end of the bracket 12 is fixed to one end of a support bracket 13. Support bracket 13
Is bolted to the frame 3a.

In the imaging unit having the above-described configuration, the lower half of the overhead surface of the overhead wire 1 forms an image directly on the plane mirror 8, and the upper half of the diagonal surface is reflected by the reflecting mirror 11. To form an image on the plane mirror 8. Accordingly, as described above, when the inspection device runs and a damaged portion of the overhead wire 1 is detected by the flaw detection coil, the camera 4 is operated by the detection signal. The entire peripheral surface of the overhead wire 1 can be imaged as one photograph by the imaging operation, and therefore, even when the damaged portion exists at any peripheral surface position, the imaging can be performed. Further, when the image of the peripheral surface of the overhead wire 1 is reflected by using the plane mirror 8 as described above, the focal length of the camera 4 can be secured even if the camera 4 and the reflecting mirror 11 are arranged close to each other. It is. Therefore, the size of the inspection apparatus can be reduced.

[0007]

However, in the conventional imaging unit shown in FIG. 7, vibrations occur during the running of the inspection apparatus, and the position of the camera 4, the plane mirror 8 and the reflection mirror 11 is only slightly changed, so that the imaging unit is imaginary. There is a disadvantage that the imaging position of the line 1 is greatly shifted. For this reason, the damaged part of the overhead wire 1 may not be imaged by the camera 4 in some cases. Also, the flash device 1
When an image is taken using the camera 4 having the overhead line 4, the output light of the flash unit 14 is reflected by the plane mirror 8 and
In this case, the output light is scattered by the plane mirror 8 and the reflecting mirror 11 and irradiates the overhead wire 1. As a result, the damaged portion of the overhead wire 1 may be light and dark, and a clear image may not be obtained.

Further, when the plane mirror 8 is disposed at the lower position shown in FIG. 7 to reflect an image obliquely upward, sunlight is reflected by the lens of the camera 4 by the plane mirror 8 due to the time of imaging and the topography. In some cases, imaging cannot be performed. Camera 4
It is also conceivable to reverse the positional relationship between the reflecting mirror 11 and the plane mirror 8. In this case, however, sunlight may directly enter the camera 4, and the lens portion of the camera 4 and the reflecting mirror may be used. The other drawback that the dust falls from the overhead wire 1 at 11 is inevitable.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an overhead wire inspection apparatus having a configuration in which a damaged portion of an overhead wire can be reliably and clearly imaged by a camera. I do.

[0010]

SUMMARY OF THE INVENTION The present invention relates to an overhead line inspection apparatus which travels on an overhead line, comprising: a camera which is disposed to face the overhead line and is used for photographing the overhead line; A mirror for displaying an overhead line that forms a blind spot, first and second holding mechanisms for holding the camera at a shooting position where the camera is separated from the overhead line and a storage position where the camera approaches, and between the shooting position and the storage position. And a slide mechanism for slidably supporting the camera.

[0011]

The camera is held by the first holding mechanism, and the camera at this shooting position directly captures the real image of the overhead line and the image on the blind spot side by the mirror as it is. Therefore, even if the positional relationship between the camera and the mirror slightly fluctuates due to vibration during traveling, a peripheral image of the overhead line can be secured within the imaging range of the camera, and the imaging can be performed. When a camera having a flash device is used, the output light is directly radiated to the half of the peripheral surface of the overhead wire, and is radiated to the opposite half of the overhead line only through a mirror. Therefore, it is possible to sufficiently illuminate the entire peripheral surface of the overhead wire, and it is possible to perform clear imaging without causing darkness or darkness.

Since the camera faces the mirror with the overhead wire therebetween, the cameras can be arranged in a positional relationship where sunlight does not enter. Therefore, the imaging does not become impossible. Further, since the camera is slid via the slide mechanism and held at the storage position by the second holding mechanism, the size of the inspection apparatus can be reduced.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 4 to 6 are a plan view, a front view, and a side view of the overhead wire inspection apparatus according to the present invention. First, in FIG. 4, the inspection apparatus includes a pair of traveling rollers 20 and 21. These traveling rollers 20 and 21 are engaged on the overhead line 1, and one traveling roller 20 is rotatably supported by a support box 22. The other traveling roller 21 is rotatably supported above the mounting plate 23. A drive motor 24 is mounted below the mounting plate 23, and the drive motor 24 is connected to a clutch 25 (see FIG. 6) via a drive mechanism (not shown). This clutch 25 is used for connecting the traveling roller 21 and the drive motor 24. Therefore, when the drive motor 24 is operated, a rotational force is applied to the traveling roller 21 via the clutch 25, so that the apparatus of the present invention travels on the overhead line 1 by both traveling rollers 20 and 21. The clutch 25 is moved toward and away from the operating rod 26.

The above-described support box 22 and mounting plate 23
Are fixed to the outer walls of the body mounting plates 27 and 28 facing each other. These main body mounting plates 27, 28 are connected and supported by frames 29a to 29d made of L-shaped steel at each corner, and as shown in FIG. 1, introduction grooves 27a, 28a (FIG. 1) for introducing the overhead wire 1. 6). As shown in FIGS. 4 and 5, a cylindrical coil holder 30 is supported by the upper frames 29a and 29b. This coil holder 30 has a split structure,
A through hole for passing the overhead wire 1 is formed. A plurality of flaw detection coils (not shown) are radially arranged around the overhead wire 1 in the coil holder 30. These flaw detection coils electromagnetically detect these damaged parts if there is a flaw or disconnection in the wire of the overhead wire 1 while the apparatus is running,
Outputs a detection signal.

A housing 32 is detachably supported on the lower surfaces of the lower frames 29c and 29d via a U-shaped support 31. The housing 32 houses a flaw detection circuit for detecting the presence / absence and state of damage based on a detection signal from the flaw detection coil, a camera operation circuit, and the like. A recording unit 33 for recording a flaw detection signal from a flaw detection circuit is provided at one end of the housing 32.

An obstacle sensor 34 is provided in front of the traveling roller 21. The obstacle sensor 34 outputs a detection signal when the rolling roller 35 rides on an obstacle such as a damper on the overhead line 1 and rotates counterclockwise.
This detection signal is supplied to a holder opening / closing circuit in the housing 32. This opening / closing circuit activates the opening / closing mechanism of the coil holder 30 to hold the holder 30 in an open state, thereby preventing interference between the flaw detection coil and the obstacle and allowing passage on the obstacle.

A carrying handle 36 is mounted on the upper portions of the main body mounting plates 27 and 28, and a lifting ring 37 is fixed to the center of the handle 36. Further, a groove closing rod 38 for preventing the overhead wire 1 from coming out of the introduction grooves 27a, 28a is attached to the outer walls of the main body mounting plates 27, 28 so as to be movable up and down. It is prevented from falling off and falling.

An imaging section 39 is arranged near the coil holder 30. FIG. 1 and FIG.
1 is a front view and a plan view of FIG. In these figures, reference numeral 40 denotes a camera for photographing. The camera 40 is housed and fixed in a camera holder 41 and has a flash device 42. A pair of U-shaped support brackets 43 and 44 are fixed to the upper surface of the camera holder 41. One ends of a pair of slide shafts 45 are inserted through the support fittings 43 and 44, respectively, and are fixed via nuts. These slide shafts 45 extend obliquely upward with an inclination angle of 20 degrees with respect to the horizontal direction, and the other ends are slidably inserted and held in holders 46. The holder 46 is bolted to the frame 29b. Slide shafts 45, 45
Are connected and fixed by a connecting fitting 49 having an L-shaped cross section, and a fitting member 47 and a fitting member 48 are respectively fixed to opposing surfaces of the connecting fitting 49 and the holder 46. I have. As shown in FIG. 3, the fitting member 47 has a fitting hole 47a, and the fitting member 48 has a projection 48a. The fitting member 47 and the fitting member 48 are formed of plastic or the like to constitute a first holding mechanism, and the fitting hole 47 is formed.
The other ends of the pair of slide shafts 45 are fixed to the holder 46 by fitting the projections 48a into a. In this fixed state, the camera 40 is separated obliquely downward from the overhead line 1 and held at a predetermined photographing position.

Further, on the opposing surfaces of the holder 46 and the support fitting 43, other fitting members 47 'and fitting members 48' are fixed respectively. The fitting member 47 ′ and the fitting member 48 ′ constitute a second holding mechanism. The camera 40 is pushed in, and the projection 48 a is fitted into the fitting hole 47 ′ a, so that one end of the pair of slide shafts 45 is held by the holder. 46, the camera 40 can be held at the pushed-in (retracted) position shown by the dashed line in FIG.

A V-shaped reflecting mirror 50 is disposed diagonally above and close to the overhead line 1. Both ends of the reflecting mirror 50 are supported by rotating plates 51, 51, and these rotating plates 51 are rotatably attached to the tips of mounting brackets 52 via U-shaped spring washers 53 (see FIG. 2). Have been. The mounting bracket 52 is bolted to the frame 29 a, and a stopper 54 is fixed at a position near the rotating plate 51. These stoppers 54 are used to restrict the rotation of the rotating plate 51 when the reflecting mirror 50 is rotated and displaced to a reflection position indicated by a solid line in FIG. 1 and a retracted position indicated by a dashed line.

A connecting piece 55 is fixed at the center of the upper surface of the reflecting mirror 50, and a concave portion 50a is formed at the center of the upper end thereof. On the other hand, another connecting piece 56 is fixed to the center of the connecting fitting 49 connecting the slide shafts 45, 45.
These two connecting pieces 55 and 56 are connected to each other by a chain 57 passing through the concave portion 50a of the reflecting mirror 50.

Next, the operation of the inspection apparatus of the present invention will be described. As shown in FIGS. 4 and 5, when the inspection device is mounted on the overhead wire 1, as shown by the solid lines in FIGS. 1 and 2,
The camera 40 is pulled out to the photographing position, and the pair of slide shafts 45 are connected to the holder 4 via the fitting member 47 and the fitting member 48.
Fix to 6. When the camera 40 is pulled out to the shooting position and positioned, a pulling force is applied to the connecting piece 55 via the chain 57, so that the rotating plate 51 rotates counterclockwise in FIG. Position in position. Accordingly, a half of the peripheral surface obliquely above the overhead wire 1 is projected on the reflecting mirror 50.

When the inspection device runs on the overhead wire 1 and the flaw detection coil of the coil holder 30 detects a wire break or a flaw, the camera operation circuit operates, and the shutter (circuit) of the camera 40 and the flash device 42 Activate In this case, the output light of the flash device 42 directly hits the lower half of the overhead surface of the overhead wire 1, and is reflected only once by the reflecting mirror 50, and hits the upper half of the overhead surface of the overhead wire 1. Therefore, the entire peripheral surface of the overhead wire 1 can be sufficiently irradiated with the output light of the flash device 42, so that the camera 40 can clearly image the damaged portion of the overhead wire 1.

Even if the inspection apparatus vibrates during traveling, the camera 40 is fixed to the holder 46 by the first holding mechanism, and the rotation of the reflecting mirror 50 is restricted by the stopper 54. Accordingly, the positional relationship between the camera 40 and the reflecting mirror 50 hardly fluctuates, and even if the positional relationship slightly fluctuates, the camera 40 and the reflecting mirror 50 directly face each other.
0 is located in the shooting range. Therefore, imaging of the overhead line 1 can be performed reliably.

Further, since the camera 40 and the reflecting mirror 50 can be directly opposed to each other, they are arranged at an oblique angle of 20 degrees with respect to the horizontal direction. Therefore, the sunlight hardly enters the lens of the camera 40 or the reflecting mirror 50, and
Incapability of imaging can also be avoided. In addition, since the dust on the overhead wire 1 does not fall on the lens or the like of the camera 40, imaging failure or the like does not occur.

When the traveling of the overhead wire 1 is stopped and the flaw detection operation is completed, the camera 40 is pushed to the pushing position shown by the one-dot chain line in FIG. 1, and the pair of slide shafts 45 is moved to the second holding mechanism, ie, It is fixed to the holder 46 by a fitting member 47 'and a fitting member 48'. Therefore, the camera 40 can be pushed into the inspection apparatus to reduce its size and prevent the camera 40 from being damaged.

On the other hand, when the camera 40 is pushed in and fixed, the pair of slide shafts 45 slide in the holder 46 in the axial direction, and a pulling force is applied to the connecting piece 55 via the chain 57. Accordingly, since the rotating plate 51 rotates clockwise in FIG. 1 to a position regulated by the stopper 54, the reflecting mirror 5 is rotated.
0 is displaced to the retracted position indicated by the dashed line. Therefore, the inspection device can be attached to and removed from the overhead wire 1 without bringing the overhead wire 1 into contact with the reflecting mirror 50.

In the above embodiment, the holding means of the slide shaft 45 is not limited to the fitting members 47, 47 ', etc. In other words, it is sufficient that the slide shaft 45 can be detachably fixed from the holder 46. Also,
The arrangement positions of the camera 40 and the reflecting mirror 50 may be arranged at other inclination angles with respect to the horizontal direction.

[0029]

As described above, according to the present invention,
Since the camera is slid via the slide mechanism to hold the camera at the shooting position and the storage position by the first and second holding mechanisms, respectively, and the camera and the mirror are directly opposed, the traveling Inspection apparatus capable of imaging the damaged part without being affected by the vibration of the apparatus, sunlight, dust and the like, and reliably applying the light of the flash device to the entire peripheral surface of the overhead wire. Therefore, the damaged portion of the overhead wire can be accurately and clearly imaged by the camera. Also,
Since the camera can be pushed into the device and held, the size of the inspection device can be reduced and the camera can be prevented from being damaged.

[Brief description of the drawings]

FIG. 1 is a front view of an imaging unit of an inspection device according to the present invention.

FIG. 2 is a plan view of the imaging unit.

FIG. 3 is a perspective view of a holding mechanism according to the present invention.

FIG. 4 is a plan view of the inspection device according to the present invention.

FIG. 5 is a front view of the inspection device.

FIG. 6 is a side view of the inspection apparatus.

FIG. 7 is a front view of a conventional imaging unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Overhead wire 20, 21 Running roller 39 Imaging part 40 Camera 42 Flash device 45 Slide shaft 46 Holder 47, 47 'Fitting member 48, 48' Fitting member 50 Reflecting mirror 51 Rotating plate 54 Stopper 55, 56 Connecting piece 57 chain

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-243806 (JP, A) JP-A-1-103110 (JP, A) JP-A-61-293106 (JP, A) JP-A-2- 155409 (JP, A) Full opening 1986-192614 (JP, U) Full opening 62-100398 (JP, U) Full opening 63-155054 (JP, U) Full opening 3-119013 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) H02G 1/02 G01N 21/89 G03B 15/00

Claims (2)

(57) [Claims] 1. An overhead line inspection apparatus traveling on an overhead line, comprising: a camera disposed to face the overhead line and used for photographing the overhead line; and an overhead provided in a field of view of the camera and serving as a blind spot of the camera. A mirror that projects a line, a first holding mechanism that holds the camera at a shooting position where the camera is separated from the overhead line, and a camera that holds the camera at a storage position where the camera approaches the overhead line. An overhead line inspection apparatus, comprising: a second holding mechanism that performs the operation; and a slide mechanism that slidably supports the camera between the photographing position and the storage position. 2. When the camera is set to the shooting position, the mirror is set to the shooting position, and when the camera is set to the storage position, the mirror and the mirror are interposed so that the mirror retreats to the retreat position. The overhead line inspection device according to claim 1, wherein the overhead line inspection device is connected via a member.