JP2017099036A - Device for photographing transmission line abnormal place - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for photographing a transmission line abnormal place having a simple construction, capable of accurately specifying a position of an abnormal place.SOLUTION: A device for photographing a transmission line abnormal place includes: a cylindrical gear 2 which is rotated around a long axis of a transmission line which is made to pass through the inner peripheral surface 2a and in which an internal tooth and an external tooth 4 are engraved on the inner peripheral surface 2a and the outer peripheral surface 2b, respectively; photographing means 5 which is attached to the cylindrical gear 2 and by which an abnormal plate 51 is photographed; rotation number detection means 6 for detecting the number of rotations of this cylindrical gear 2 when the cylindrical gear 2 is rotated around the long axis; a motor 7 which includes a gear 7a meshing with the external gear 4 and a body part 7b for driving this gear 7a; and a box type cover part 8 which is adjacent to the cylindrical gear 2 and in which the motor 7 and the cylindrical gear 2 are housed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power transmission line abnormality point imaging device that images an abnormal part of a metal strand constituting a power transmission line, and in particular, a power transmission line abnormality having a simple configuration capable of accurately specifying the position of the abnormal part. The present invention relates to a location photographing apparatus.

Conventionally, transmission lines installed between steel towers have been constructed by twisting a plurality of metal strands in a spiral, and if they are exposed to wind and rain for a long period of time, they will not break. In some cases, the metal strand may be damaged. If an abnormal part such as this damage is left unattended, the possibility that the transmission line will be disconnected in the future increases, so it is very important for the transmission line maintenance and monitoring work to detect the abnormal part as soon as possible.
At present, the abnormal part is detected by patrol from a helicopter and patrol from the ground. And when an abnormal part is detected by these patrols, the power transmission line is interrupted, and the worker approaches the abnormal part while being suspended on the power transmission line and directly observes this, or using a robot This abnormal part is photographed.
However, the direct visual recognition of the former has a problem of enormous labor and danger. In addition, the latter robot is very large because it is a self-propelled vehicle for extending an overhead wire and is very large, and it is extremely difficult to lift it on a steel tower and install it on a transmission line. There was a problem that there was.
Therefore, in order to solve such problems, in recent years, a technology related to a power transmission line abnormality point imaging device that can be easily used with a simple configuration has been developed, and several inventions have already been disclosed.

First, Patent Literature 1 discloses an invention relating to an overhead wire self-propelled vehicle used for inspection of a ground cable passed over a steel tower under the name of “overhead self-propelled vehicle”.
Hereinafter, the invention disclosed in Patent Document 1 will be described. The invention disclosed in Patent Document 1 includes a free wheel that travels over an overhead line on a vehicle body, a drive wheel that travels under the overhead line in opposition thereto, a spring that biases the drive wheel toward the overhead line, and a biasing force of the spring And a release device.
According to the overhead wire self-propelled vehicle having such characteristics, the recovery traction rope can be coupled to the spring biasing force release device. In this configuration, the urging of the spring can be released by pulling the rope, so that the self-propelled vehicle can be easily collected. It is also possible to provide a video camera and a distance counter in the front part of the vehicle body, and with this configuration, it is possible to match the position of the overhead wire with the damaged position.

Next, Patent Document 2 discloses an invention related to an aerial cable monitoring device that is useful when, for example, inspecting an optical composite aerial ground wire under the name of “aerial cable monitoring device”.
The invention disclosed in Patent Literature 2 includes a device main body capable of traveling along an aerial cable, a sensor mounted on the device main body for observing the state of the aerial cable, and the sensor along the outer periphery of the aerial cable. And a sensor rotation mechanism that rotates the sensor and a transmission device that transmits an output signal of the sensor to the reception device.
In the overhead cable monitoring apparatus having such a feature, since the sensor rotates along the outer periphery of the overhead cable, the entire circumference of the overhead cable can be observed in detail.

Further, Patent Document 3 discloses an invention relating to an electric wire inspection device that is named “electric wire inspection device” and can detect an abnormality by photographing the outer periphery of the electric wire with a camera.
The invention disclosed in Patent Document 3 includes a frame fixed on a support for supporting at a height position in the vicinity of the electric wire, a swing mechanism that swings around the electric wire with respect to the frame, A camera attached to the swing mechanism for photographing the outer periphery of the electric wire, wherein the camera can photograph the outer periphery of the electric wire while reciprocating around the electric wire at a predetermined rotation angle, and confirm abnormality of the electric wire from the photographed image. To do.
In the electric wire inspection apparatus having such a feature, the inspection work can be easily performed over the entire circumference of the electric wire without oversight. Moreover, since it is a small and lightweight structure, it can be easily installed on an electric wire by providing it on a simple support such as an insulating operation rod as well as a self-propelled aircraft.

Patent Document 4 discloses an invention relating to an overhead wire inspection device that can easily run along an inclined overhead wire under the name “overhead wire inspection device”.
The invention disclosed in Patent Document 4 has a circular opening provided in the lower portion with a notch that allows an overhead wire to be introduced from the outer peripheral direction, and is arranged so that the overhead wire is positioned approximately at the center of the opening. A pair of opposed moving frames having wheels that roll with the overhead wire as a track, and a chuck device that grips the outer circumference of the overhead wire from both sides at equal pressure toward the center of the overhead wire, and these moving frames Expansion and contraction means for extending and contracting the other moving frame along the axial direction of the overhead wire with respect to one moving frame, and when one chuck device holds the overhead wire, When the chuck device releases the overhead wire and the telescopic means moves the pair of moving frames relatively away from each other and the other chuck device grips the overhead wire, one chuck device removes the overhead wire. Release The expansion / contraction means moves the pair of moving frames relatively close to each other, and the pair of chuck devices repeat the operation of gripping or releasing the overhead wire and the operation of extending and contracting the pair of movement frames along the overhead line. It is characterized by moving.
In the overhead wire inspection apparatus having such a feature, one moving frame and the other moving frame alternately grip the overhead wire, so that the self-propelled vehicle runs along the inclined overhead wire without damaging the overhead wire. Is easy. In addition, by installing a plurality of cameras at equal intervals around the overhead line on the other moving frame, the entire outer circumference of the overhead line can be inspected.

JP-A 61-293106 JP 63-314113 A JP 2005-94935 A JP 2012-161118 A

  However, in the invention disclosed in Patent Document 1, since the construction of the overhead wire self-propelled vehicle is complicated, the manufacturing cost may be high.

  Next, in the invention disclosed in Patent Document 2, the data on the entire circumference of the cable can be confirmed by the device on the hand side, but data relating to the position of the abnormal part cannot be collected.

  Furthermore, in the invention disclosed in Patent Document 3, the configuration of the electric wire inspection apparatus is complicated, so that the manufacturing cost may be high as in the invention disclosed in Patent Document 1.

  Finally, in the invention disclosed in Patent Document 4, since the number of members is large, there is a possibility that the size is increased and it is difficult to attach to the power transmission line.

  The present invention has been made in response to such a conventional situation, and it is possible to photograph an abnormal part over the entire circumference of the transmission line and to accurately identify the position of the abnormal part, and An object of the present invention is to provide a power transmission line abnormality point photographing device that is easy to attach to a power transmission line and that can suppress the manufacturing cost.

  In order to achieve the above object, the first invention is to detect and photograph abnormal portions such as damage of a metal wire while moving along a power transmission line formed by twisting a plurality of metal wires in a spiral shape. Power transmission line abnormal part imaging device for passing the power transmission line through its inner peripheral surface and rotating about the major axis of the power transmission line, the inner teeth and the outer teeth on the inner peripheral surface and the outer peripheral surface, respectively A cylindrical gear that is engraved on, a photographing means that is attached to the cylindrical gear and photographs an abnormal part, and a rotation that detects the number of rotations of the cylindrical gear when the cylindrical gear rotates around the long axis A motor having a number detection means, a gear meshing with external teeth, and a main body for driving the gear, and a box-shaped cover portion that is adjacent to the cylindrical gear and accommodates the motor and the cylindrical gear; The cover portion has an opening on one end surface that supports the cylindrical gear. And the inner teeth, and a plurality of metal wires is engaged in a spiral groove portion that is formed by being twisted spirally.

In the invention having such a configuration, after the transmission line abnormality point photographing device is mounted on the transmission line, when the motor is driven, the gear rotates, and the external teeth meshing with the gear are centered on the long axis of the transmission line. To turn. At the same time, the rotating internal teeth mesh with the groove portion of the power transmission line, so that the entire power transmission line abnormality point photographing device advances spirally along the groove portion as the cylindrical gear rotates.
When the cylindrical gear comes into contact with an abnormal location, for example, the imaging unit images the abnormal location, and the rotation number detection unit detects the rotation number of the cylindrical gear at this time.

Next, according to a second aspect, in the first aspect, the rotation number detected by the rotation number detection means, the inclination angle of the groove with respect to the long axis of the power transmission line, and the radius of the inner peripheral surface are long. An arithmetic unit that calculates the movement distance of the cylindrical gear along the axis is provided.
In the invention having such a configuration, the movement distance of the cylindrical gear along the long axis of the transmission line is L, the rotation number per movement distance L detected by the rotation number detecting means is N, and the inclination of the groove portion with respect to the long axis Assuming that the angle is θ and the radius distance of the inner peripheral surface is r, the moving distance L is obtained by (2πrN) / tan θ. Note that the inclination angle θ and the distance r are known.

Further, according to a third invention, in the first or second invention, the cylindrical gear senses a case where the surface of the cylindrical gear comes into contact with an abnormal location and outputs a signal, and transmits the signal to the main body of the motor. A sensor is installed, and the main body is characterized in that when the signal transmitted from the sensor is input, the direction in which the gear rotates is switched to the reverse direction.
In the invention of such a configuration, when the surface of the cylindrical gear comes into contact with an abnormal location, the signal output from the sensor is transmitted to the main body of the motor, so that the gear rotates in the reverse direction. The power transmission line abnormal part imaging device automatically returns to the original position along the power transmission line after contacting the abnormal part.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the cylindrical gear is attached with a display unit that displays at least one of the number of rotations and the moving distance (hereinafter referred to as numerical data), The display portion and the abnormal part are photographed in the same field of view.
In the invention having such a configuration, in addition to the operation of the second or third invention, the position of the abnormal portion is visually recognized in association with the numerical data.

And in 5th invention, in 4th invention, rotation number detection means is connected with the numerical recording medium which records numerical data, and / or the numerical display which is installed on the ground and displays this numerical data It is characterized by being.
In the invention having such a configuration, in addition to the operation of the fourth invention, the numerical data is confirmed after the rotation number is detected by the numerical recording medium, and the numerical value is displayed in real time when the rotation number is detected by the numerical display device. Data is confirmed.

In a sixth invention according to any one of the first to fifth inventions, the imaging means is installed on an image recording medium and / or the ground for recording image data obtained by imaging an abnormal part. It is connected with the image display apparatus which displays.
In the invention having such a configuration, in addition to the action of any one of the first to fifth inventions, the image data is confirmed after the abnormal part is photographed by the numerical recording medium, and in real time at the time of photographing by the image display device. Image data is confirmed.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, the internal tooth has a triangular shape including a tip portion that meshes with the bottom and the groove when viewed from the side, The tip portion is characterized in that a sphere that slides along the groove and a recess in which the sphere is embedded so as to roll are formed.
In the invention having such a configuration, in addition to the action of any one of the first to sixth inventions, the internal teeth have a triangular shape including the tip portion, and the sphere at the tip portion rolls. It moves smoothly along the groove without detaching the teeth.

  According to the first aspect, since the cylindrical gear provided with the imaging means rotates around the long axis of the power transmission line, it is possible to image an abnormal location over the entire circumference of the power transmission line. Moreover, since the rotation number detection means detects the rotation number of the cylindrical gear at this time, the position of the abnormal part associated with the rotation number can be grasped.

  According to the second invention, in addition to the effect of the first invention, the calculation unit calculates the moving distance of the cylindrical gear, so that the position of the abnormal part can be easily specified.

  According to the third invention, in addition to the effects of the first or second invention, when the surface of the cylindrical gear comes into contact with the abnormal part, the power transmission line abnormal part imaging device returns to the original position along the power transmission line. Since it automatically returns, it is not necessary for the worker to secure the power transmission line abnormality spot photographing device after the contact, so that labor can be greatly reduced and the safety of the worker can be ensured.

  According to the fourth invention, in addition to the effects of the second or third invention, the position of the abnormal part is visually recognized in association with the numerical data, so that the position of the abnormal part can be accurately specified.

  According to the fifth aspect, in addition to the effects of the fourth aspect, numerical data can be confirmed at a desired timing. Therefore, it is possible to accurately determine the procedure for repairing an abnormal location on the ground, and it is possible to improve the work efficiency of the repair.

  According to the sixth invention, in addition to the effects of any one of the first to fifth inventions, in addition to specifying the exact position of the abnormal part, the change in shape such as breakage or deformation of the abnormal part is also clarified. Can be confirmed.

  According to the seventh invention, in addition to the effects of any one of the first to sixth inventions, the cylindrical gear slides along the metal wire because the inner teeth smoothly move along the groove portion without being detached. It is possible to move in a spiral shape. Therefore, since the number of rotations and the movement distance of the cylindrical gear can be accurately detected, the position of the abnormal part can be accurately identified.

It is a longitudinal cross-sectional view of the power transmission line abnormality location imaging device which concerns on an Example. (A) And (b) is the AA arrow directional cross-sectional view and BB arrow directional cross-sectional view in FIG. 1, respectively. It is a side view of the internal tooth which comprises the power transmission line abnormality location imaging device which concerns on an Example. It is a schematic diagram for demonstrating the movement distance of the cylindrical gearwheel along the long axis of a power transmission line. (A) is a layout diagram of a power transmission line abnormality point photographing device attached to a power transmission line, a numerical display device and an image display device, and (b) is an external view of the numerical display device and the image display device. It is a block diagram which shows the data flow of the power transmission line abnormality location imaging | photography apparatus which concerns on an Example.

A power transmission line abnormality point photographing apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6. FIG. 1 is a longitudinal cross-sectional view of a power transmission line abnormality point photographing apparatus according to an embodiment.
As shown in FIG. 1, the power transmission line abnormality point imaging device 1 according to the present embodiment is moved along a power transmission line 50 formed by twisting a plurality of metal strands 50a in a spiral manner. 50a is a power transmission line abnormal part imaging device for detecting and photographing an abnormal part 51 such as damage to 50a. The power transmission line 50 is passed through the inner peripheral surface 2a and rotated around the major axis C of the power transmission line 50. The internal gear 3 (see FIG. 2B) and the external gear 4 are engraved on the inner peripheral surface 2a and the outer peripheral surface 2b, respectively, and the abnormal gear 51 is attached to the cylindrical gear 2. A photographing means 5 for rotating, a rotational speed detecting means 6 for detecting the rotational speed of the cylindrical gear 2 when the cylindrical gear 2 rotates about the long axis C, and a gear 7a meshing with the external teeth 4. A motor 7 having a main body 7b for driving the gear 7a, and a cylindrical gear Adjacent to, it includes a cover portion 8 of the box-shaped housing the motor 7 and the cylindrical gear 2, a. In the figure, the α and β directions are the directions of rotation of the cylindrical gear 2, and the white arrows a and b indicate that the power transmission line abnormality point photographing apparatus 1 when the cylindrical gear 2 rotates in the α and β directions, respectively. The direction of movement.

The photographing means 5 is composed of a pair of cameras 5a and 5b installed to face the cylindrical gear 2. The rotation number detecting means 6 is composed of a magnetic sensor 6a installed on the end face 8a of the cover portion 8 and a magnet 6b attached to a part of the cylindrical gear 2 opposite to the magnetic sensor 6a. Moreover, the cover part 8 is a structure which does not rotate centering | focusing on the long axis C of the power transmission line 50, Comprising: The opening part 15 which supports the cylindrical gearwheel 2 opens in the end surface 8a.
The cylindrical gear 2 is attached with a display unit 9 for displaying the moving distance of the cylindrical gear 2 along the long axis C detected by the rotation number detecting means 6. Then, the photographing unit 5 photographs the display unit 9 and the abnormal part 51 in the same visual field D. The moving distance of the cylindrical gear 2 along the long axis C is calculated by the calculation unit 10 electrically connected to the rotation number detection means 6 and the display unit 9.

Further, the cylindrical gear 2 is provided with a pressure sensor 11 that senses a case where the surface of the cylindrical gear 2 is in contact with the abnormal portion 51 and outputs a signal, and transmits the signal to the main body portion 7 b of the motor 7. When the signal transmitted from the pressure sensor 11 is input, the main body 7b switches the direction in which the gear 7a rotates to the reverse direction.
On the other hand, the signal output from the pressure sensor 11 is also transmitted to the photographing unit 5 to cause the photographing unit 5 to perform photographing. Further, this signal is also transmitted to the rotation number detecting means 6 to detect the rotation number at this time. Thereafter, the rotation number detection means 6 transmits the detected rotation number to the calculation unit 10. The pressure sensor 11 and the main body 7b are electrically connected by an electric circuit (not shown). The pressure sensor 11 and the photographing means 5, and the pressure sensor 11 and the rotation number detecting means 6 are electrically connected by an electric circuit shown in FIG.
The motor 7 is supported by a battery 12 that is detachably accommodated in the bottom portion 8b of the cover portion 8, and receives power supply. The battery 12 and the motor 7 can be separated from each other. Further, the motor 7 starts or stops driving of the gear 7 a by a power switch (not shown) connected to the battery 12. Note that the photographing unit 5, the rotation number detection unit 6, the display unit 9 and the calculation unit 10 are also supplied with power by the battery 12.
Furthermore, a roller 13 that is rotatably supported by a frame body 13 a installed on the bottom portion 8 b is provided adjacent to the main body portion 7 b of the motor 7. The roller 13 is provided between the power transmission line 50 and the ceiling surface 8 c of the cover portion 8 in order to prevent the cover portion 8 from being inclined in the vertical direction with respect to the long axis C.

Next, the cover portion 8 will be described in more detail with reference to FIG. 2A and 2B are a cross-sectional view taken along line AA and a cross-sectional view taken along line BB in FIG. 1, respectively. In addition, about the component shown in FIG. 1, the same code | symbol is attached | subjected also in FIG. 2, and the description is abbreviate | omitted.
As shown in FIG. 2A, the cover portion 8 is provided with an opening / closing portion 14a that opens and closes with a hinge 14 attached to the side surface 8d as a fulcrum. Furthermore, the cylindrical gear 2 is also provided with an opening / closing part 14b.
As shown in FIG.2 (b), the cover part 8 and the cylindrical gear 2 are provided with the opening-and-closing part 14a and the opening-and-closing part 14b, respectively. Therefore, the power transmission line abnormality point photographing device 1 is attached to the power transmission line 50 by opening the opening / closing parts 14a, 14b at the same time, sandwiching the power transmission line 50 between the inner peripheral surfaces 2a, and then closing the opening / closing parts 14a, 14b. . In addition, a locking member (not shown) is provided to prevent the opening / closing portions 14a and 14b from being opened unexpectedly, and the holding of the power transmission line 50 is held. The inner teeth 3 mesh with a spiral groove 50b formed by twisting a plurality of metal strands 50a spirally.

Next, the configuration of the internal teeth 3 will be described in more detail with reference to FIG. FIG. 3 is a side view of the internal tooth 3. 1 and 2 are denoted by the same reference numerals in FIG. 3 and description thereof is omitted.
As shown in FIG. 3, the internal teeth 3 have a substantially triangular shape including a tip 3 b that meshes with the base 3 a and the groove 50 b (see FIG. 2B) when viewed from the side. And this base 3a is attached to the internal peripheral surface 2a so that attachment or detachment is possible. More specifically, the bottom 3a is attached to a thin plate 3e in which a screw hole 16a into which a retaining screw 16 is screwed is inserted in the vicinity of both left and right ends. In addition, a screw hole 16 b into which the retaining screw 16 is screwed is also provided in the inner peripheral surface 2 a of the cylindrical gear 2.
Furthermore, the tip 3b is formed with a sphere 3c that slides along the groove 50b, and a recess 3d in which the sphere 3c is embedded so as to roll.

Next, the calculation of the movement distance of the cylindrical gear 2 by the calculation unit 10 will be described in more detail with reference to FIG. FIG. 4 is a schematic diagram for explaining the moving distance of the cylindrical gear along the long axis C of the power transmission line. The constituent elements shown in FIGS. 1 to 3 are denoted by the same reference numerals in FIG. 4 and the description thereof is omitted.
As described above, the power transmission line abnormality point photographing device 1 is configured so that the number of rotations detected by the rotation number detection unit 6, the inclination angle of the groove 50b with respect to the long axis C of the power transmission line 50, and the radius of the inner peripheral surface 2a. To a calculation unit 10 (see FIG. 1) for calculating the movement distance of the cylindrical gear 2 along the long axis C.
As shown in FIG. 4, the movement distance of the cylindrical gear 2 along the long axis C is L (cm), the rotation number per movement distance L detected by the rotation number detection means 6 is N (times), and the transmission line The inclination angle of the groove 50b with respect to the major axis C of 50 is θ (rad) (0 <θ <π / 2), the radius of the inner peripheral surface 2a of the cylindrical gear 2 is r (cm), and the distance of the hypotenuse of the right triangle PQR is Assuming that S (cm), the following equations (1) and (2) are established.

  From equations (1) and (2), the moving distance L is expressed by equation (3).

In addition, since the inclination angle θ of the groove 50b and the radius r of the inner peripheral surface 2a of the cylindrical gear 2 are known, if the rotation number N detected by the rotation number detection means 6 is substituted into the equation (3), The moving distance L of the cylindrical gear 2 along the long axis C can be obtained.
Further, since the calculation unit 10 is electrically connected to the display unit 9, the numerical data D ₁ including the movement distance L of the cylindrical gear 2 is output from the calculation unit 10 to the display unit 9. With this configuration, the display unit 9 can display the movement distance L.
In addition, the numerical data D ₁ including the movement distance L (see FIG. 5B) is transmitted to other numerical display devices in addition to being transmitted to the display unit 9.
Furthermore, the image data D ₂ (see FIG. 5B) obtained by photographing the abnormal part 51 photographed by the photographing means 5 is transmitted to the image display device 17b.

Such a configuration will be described in more detail with reference to FIGS. FIG. 5A is a layout diagram of the power transmission line abnormality point photographing device 1 attached to the power transmission line 50, the numerical display device 17a, and the image display device 17b. FIG. 5B shows the numerical display device 17a and the numerical display device 17a. It is an external view of the image display apparatus 17b. FIG. 6 is a configuration diagram of the power transmission line abnormality point photographing apparatus 1 according to the embodiment. The components shown in FIGS. 1 to 4 are denoted by the same reference numerals in FIGS. 5 and 6 and the description thereof is omitted.
As shown in FIGS. 5A and 6, the power transmission line abnormality point photographing apparatus 1 is attached to the power transmission line 50 installed between the two steel towers 52. The rotation number detection means 6 provided in the power transmission line abnormality point photographing device 1 is installed on the ground G via the calculation unit 10 and displays numerical data D ₁ including the movement distance L of the cylindrical gear 2. Connected to the device 17a. The connection between the rotation number detecting means 6 and the numerical value display device 17a is performed by wireless communication 18a.
The imaging unit 5 is connected to the image display device 17b for displaying the image data D ₂ obtained by photographing the installed anomaly 51 on the ground G. The connection between the photographing means 5 and the image display device 17b is also made by the wireless communication 18b. The wireless communications 18a and 18b are both transmitted to a receiving unit (not shown) provided in the numerical display device 17a and the image display device 17b by a transmitting unit (not shown) accommodated in the cover unit 8, respectively. Is done.
As shown in FIGS. 5B and 6, the numerical display device 17 a and the image display device 17 b are integrally configured as a display device 17. Of the screen of the display device 17, the screen of the left side is displayed numeric data D ₁ and the image data D _2, in the right side screen, the image data D _{2 'is} displayed. The image data D ₂ and D ₂ ′ are image data photographed by the cameras 5a and 5b, respectively.
As shown in FIG. 6, the imaging means 5 and the rotation number detection means 6 receive the signals output from the pressure sensor 11, respectively, so that the imaging of the abnormal part 51 and the rotation number of the cylindrical gear 2 are detected. Detection is performed.

  In the power transmission line abnormality point imaging device 1 having the above configuration, when the power switch is turned on after the power transmission line abnormality point imaging device 1 is attached to the power transmission line 50, power is supplied from the battery 12 to the motor 7. Thus, the gear 7a rotates in the α direction. Then, the external teeth 4 meshing with the gear 7 a rotate around the long axis C of the power transmission line 50. Since the inner teeth 3 that rotate at the same time mesh with the groove 50b of the power transmission line 50, the entire transmission line abnormality point photographing device 1 spirals along the groove 50b as the cylindrical gear 2 rotates. Proceed to. More specifically, the sphere 3c of the inner tooth 3 slides along the groove 50b while rolling in the recess 3d. In addition, since the cover part 8 is provided with the roller 13, since the cover part 8 is prevented from inclining with respect to the long axis C when the power transmission line abnormality point photographing apparatus 1 proceeds, the rotation of the cylindrical gear 2 is prevented. The movement is maintained, and the power transmission line abnormality point imaging device 1 can travel along the power transmission line 50.

And when the pressure sensor 11 installed in the cylindrical gear 2 contacts the abnormal part 51, the pressure sensor 11 detects this, and outputs a signal to the main-body part 7b of the motor 7 via the electric circuit mentioned above. This signal is also transmitted to the photographing means 5 and the rotation number detecting means 6.
Thus, the rotation speed detector 6 sends a number of rotation detected in arithmetic unit 10, arithmetic unit 10 transmits the numerical data D ₁ to the display unit 9 and the numeric display device 17a. Further, imaging means 5 performs imaging of the display unit 9 numerical values are displayed in the data D ₁ and abnormal location 51, and transmits the image data D _2, D 2 _'to the image display device 17b.
Moreover, since the main-body part 7b of the motor 7 switches the direction which the gearwheel 7a rotates to a reverse direction, the power transmission line abnormality location imaging device 1 will automatically return to the original position. Since this switching needs to be performed after photographing by the photographing means 5, the electric circuit connecting the pressure sensor 11 and the main body portion 7b sets the timing for transmitting the signal from the pressure sensor 11 to the main body portion 7b for a certain time. A delay circuit for delaying is desirable.

As described above, according to the transmission line abnormality point imaging apparatus 1 of the present embodiment, the cylindrical gear 2 including the imaging unit 5 rotates about the major axis C of the transmission line 50, so The abnormal part 51 can be photographed over the circumference. At this time, since the internal teeth 3 of the cylindrical gear 2 mesh with the groove 50b, the cylindrical gear 2 can move spirally without slipping along the metal strand 50a. Therefore, since the rotation number N of the cylindrical gear 2 can be accurately detected, the position of the abnormal portion 51 can be accurately specified. The numerical data D ₁ including the position of the abnormal part 51 can be grasped in centimeter units on the display unit 9 that displays the calculation result by the calculation unit 10.
Further, according to the power transmission line abnormality point photographing device 1, the numerical data D ₁ and the image data D ₂ and D ₂ ′ photographed by the photographing means 5 can be simultaneously viewed on the ground by the display device 17. Therefore, in addition to specifying the exact position of the abnormal part 51, it is possible to clearly confirm a change in shape such as breakage or deformation of the abnormal part 51. Therefore, it is possible to accurately determine the procedure of repair work for the abnormal location 51 on the ground, and the work efficiency of repair can be improved.
Furthermore, according to the power transmission line abnormality point photographing apparatus 1, the cylindrical gear 2, the photographing means 5, the rotation number detecting means 6 and the like are simple in structure. Therefore, it is possible to reduce the size and weight, so that it is easy to attach to the power transmission line 50 and the manufacturing cost can be suppressed.
In addition, since the internal teeth 3 are detachably attached to the inner peripheral surface 2a of the cylindrical gear 2, a combination of the sizes of the cylindrical gears 2 and a plurality of diameters of different sizes and the number of metal strands 50a. The present invention can also be applied to various types of power transmission lines 50 and has good versatility.

In addition, the structure of the power transmission line abnormality location imaging | photography apparatus 1 of this invention is not limited to what is shown in an Example. For example, the number of internal teeth 3 is not limited to six as shown in FIG. Moreover, the imaging | photography means 5 may be comprised by 1 unit | set or 2 or more cameras. Furthermore, the screen layout in the display device 17 may be other than that shown in FIG. The rotation speed detector 6 may be connected to the numerical value recording medium for recording numerical data D ₁ instead of being connected to the numerical display device 17a for displaying numerical data D _1, also this value recording medium And may be connected to the numerical value display device 17a. Photographing means 5 is also connected to the image recording medium for recording the image data D ₂ instead of being connected to an image display device 17b for displaying the image data D ₂ may, The image recording medium and an image display device 17b May be connected.

  The present invention relates to a power transmission line abnormal point imaging device for detecting and photographing an abnormal part such as damage of the metal strand while moving along a power transmission line formed by twisting a plurality of metal strands in a spiral shape. Is available as

  DESCRIPTION OF SYMBOLS 1 ... Power transmission line abnormality location imaging device 2 ... Cylindrical gear 2a ... Inner peripheral surface 2b ... Outer peripheral surface 3 ... Internal tooth 3a ... Base 3b ... Tip part 3c ... Sphere 3d ... Recess 3e ... Thin plate 4 ... External tooth 5 ... Imaging means 5a , 5b ... Camera 6 ... Number of rotation detection means 6a ... Magnetic sensor 6b ... Magnet 7 ... Motor 7a ... Gear 7b ... Main body part 8 ... Cover part 8a ... End face 8b ... Bottom part 8c ... Ceiling face 8d ... Side face 9 ... Display part 10 ... Calculation unit 11 ... Pressure sensor 12 ... Battery 13 ... Roller 13a ... Frame 14 ... Hinges 14a, 14b ... Opening / closing part 15 ... Opening part 16 ... Clamp screw 16a, 16b ... Screw hole 17 ... Display device 17a ... Numerical display device 17b ... Image display device 18a, 18b ... Wireless communication 50 ... Power transmission line 50a ... Metal element wire 50b ... Groove part 51 ... Abnormal point 52 ... Steel tower

Claims (7)

While moving along a power transmission line formed by twisting a plurality of metal strands in a spiral shape, a power transmission line abnormal portion imaging device for detecting and photographing abnormal locations such as damage of this metal strand,
A cylindrical gear that passes through the inner peripheral surface of the power transmission line and rotates around the long axis of the power transmission line, and in which inner teeth and outer teeth are respectively engraved on the inner peripheral surface and the outer peripheral surface;
An imaging means attached to the cylindrical gear for imaging the abnormal part;
A rotation number detecting means for detecting the rotation number of the cylindrical gear when the cylindrical gear rotates about the long axis;
A motor comprising a gear meshing with the external teeth, and a main body for driving the gear;
A box-shaped cover portion that is adjacent to the cylindrical gear and accommodates the motor and the cylindrical gear;
This cover portion has an opening on one end face that supports the cylindrical gear,
The transmission line abnormal point imaging device, wherein the internal teeth mesh with a spiral groove formed by spirally twisting the plurality of metal strands.   The movement of the cylindrical gear along the long axis from the rotation number detected by the rotation number detecting means, the inclination angle of the groove with respect to the long axis of the power transmission line, and the radius of the inner peripheral surface The power transmission line abnormality point photographing apparatus according to claim 1, further comprising a calculation unit that calculates a distance. The cylindrical gear detects a case where the surface contacts the abnormal part and outputs a signal, and a sensor for transmitting this signal to the main body of the motor is installed.
3. The power transmission line abnormality point according to claim 1, wherein when the signal transmitted from the sensor is input, the main body unit switches a direction in which the gear rotates to a reverse direction. Shooting device. The cylindrical gear is attached with a display unit that displays at least one of the number of rotations and the movement distance (hereinafter referred to as numerical data),
4. The transmission line abnormal point imaging apparatus according to claim 2, wherein the imaging unit images the display unit and the abnormal part in the same field of view.   The rotation number detecting means is connected to a numerical recording medium that records the numerical data and / or a numerical display device that is installed on the ground and displays the numerical data. Transmission line abnormal part imaging device.   2. The image pickup means is connected to an image recording medium for recording image data obtained by photographing the abnormal part and / or an image display device installed on the ground and displaying the image data. The power transmission line abnormal part imaging device according to any one of claims 5 to 5. The inner teeth, when viewed from the side, have a triangular shape with a bottom and a tip portion that meshes with the groove,
This bottom is detachably attached to the inner peripheral surface,
The tip portion is formed with a sphere that slides along the groove and a recess in which the sphere is embedded so as to allow rolling. Power transmission line abnormality spot imaging device.

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