JP7058624B2 - Electrical equipment inspection equipment - Google Patents

Description

The present invention relates to an electrical equipment inspection device.

Some electrical equipment such as distribution boards, distribution boards, and control boards are equipped with an electrical equipment inspection device in order to periodically inspect the electrical equipment in the equipment.

For example, Patent Document 1 discloses a switchboard inspection device for inspecting an electric device provided in a spiral insulator housed in a switchboard housing. The switchboard inspection device described in Patent Document 1 includes a sensor that moves a spiral rail arranged along a spiral insulator. Then, the sensor has a camera, and the user inspects using the image captured by the camera.

Further, Patent Document 2 describes a sound collecting device with a camera capable of capturing an image of the entire control panel, and a determination device for determining the presence or absence of an abnormality from image data captured by the sound collecting device with a camera and sound collected sound data. And, the electrical equipment inspection device provided with is disclosed. In the electrical equipment inspection device described in Patent Document 2, a sound collecting device with a camera captures an image of a light emitting diode indicating the operation of the electrical device arranged in the control panel, and the determination device lights the light emitting diode of the captured image. The presence or absence of an abnormality is determined by comparing the state with the normal lighting state. Further, the determination device determines whether or not an abnormal sound is recorded in the voice data collected by the sound collecting device with a camera, and determines whether or not there is an abnormality.

Patent Document 3 describes a camera that captures a transformer and a template that extracts features indicating the shape, color, and distribution of rust and stains from the captured image, and uses the extracted features as criteria for determining rust and stains. Disclosed is a power distribution equipment inspection device including an image processing unit for determining appearance deterioration in comparison with the above.

Japanese Unexamined Patent Publication No. 2015-109717 Japanese Unexamined Patent Publication No. 2008-165453 Japanese Unexamined Patent Publication No. 2011-259575

The switchboard inspection device described in Patent Document 1 only allows the user to visually check the image captured by the camera and determine the presence or absence of an abnormality. Therefore, accurate inspection may be difficult depending on the skill level of the user to be determined.

Further, in the electrical equipment inspection device described in Patent Document 2, only the abnormality of the electrical equipment is determined from the lighting state of the light emitting diode in the control panel. Therefore, in the electrical equipment inspection device described in Patent Document 2, when the light emitting diode itself fails, an abnormality in the electrical equipment is erroneously determined. Therefore, it is difficult to perform an accurate inspection with the electrical equipment inspection device described in Patent Document 2.

In the power distribution equipment inspection device described in Patent Document 3, the accuracy of inspection depends on the template. As a result, accurate inspection may be difficult.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric equipment inspection device capable of accurately inspecting an electric equipment provided in an electric equipment.

In order to achieve the above object, the electrical equipment inspection device according to the present invention has a housing having an inner wall on which electrical equipment is installed, a rail arranged on the front side of the inner wall, and moving along the rail. There is an abnormality in the image pickup device that can image the electrical device facing the electrical device, the image pickup instruction unit that moves the image pickup device to each of multiple positions on the rail, and causes the image pickup device to image the electrical device. A determination unit for determining that is provided. The determination unit compares the image captured by the image pickup device with the image of the electric device corresponding to each of the plurality of positions at the time of installation of the housing or the image at the time of maintenance, and also compares with the image at the time of abnormality of the electric device. When it is determined that the image captured by the image pickup apparatus is more similar to the image at the time of abnormality than the image at the time of installation of the housing or the image at the time of maintenance, it is determined that there is an abnormality in the electric device.

According to the configuration of the present invention, the determination unit compares the image captured by the image pickup device with the image at the time of installation of the housing or the image at the time of maintenance of the electric device corresponding to each of the plurality of positions, and at the same time, the image of the electric device. By comparing with the image at the time of abnormality, it is determined whether or not there is an abnormality in the electrical equipment. Therefore, it is possible to accurately determine at which position the electrical device has an abnormality.

A perspective view of a switchboard inspection device according to an embodiment of the present invention and a switchboard to be inspected thereof. Block diagram of switchboard inspection device according to embodiment of the present invention A hardware configuration diagram of a control body included in the switchboard inspection device according to the embodiment of the present invention. Configuration diagram of position data used by the control body included in the switchboard inspection device according to the embodiment of the present invention. The figure of the flowchart of the inspection process performed by the switchboard inspection apparatus which concerns on embodiment of this invention.

Hereinafter, the electrical equipment inspection device according to the embodiment of the present invention will be described in detail with reference to the drawings. In the figure, the same or equivalent parts are designated by the same reference numerals. In the Cartesian coordinate system XYZ shown in the figure, when the door of the power distribution board, which is an electrical facility, is turned to the front, the left-right direction is the X-axis, the up-down direction is the Z-axis, and the direction orthogonal to the X-axis and the Z-axis is the Y-axis. be. Hereinafter, this coordinate system will be referred to and described as appropriate.

The electrical equipment inspection device according to the embodiment is a switchboard inspection device for inspecting electrical equipment arranged in the housing of the switchboard. Hereinafter, the switchboard to be inspected and the switchboard inspection device will be described with reference to FIGS. 1 to 4. Next, the operation of the switchboard inspection device will be described with reference to FIG.

FIG. 1 is a perspective view of the switchboard inspection device 1 and the switchboard 100 to be inspected according to the embodiment. FIG. 2 is a block diagram of the switchboard inspection device 1. FIG. 3 is a hardware configuration diagram of the main body control unit 40 included in the switchboard inspection device 1. FIG. 4 is a configuration diagram of the position data 51 used by the main body control unit 40. In FIG. 1, electric wires are omitted for ease of understanding.

As shown in FIG. 1, the switchboard 100 includes a steel housing 110 and a plurality of electric devices 120 housed in the housing 110.

The housing 110 is formed in the shape of a hollow rectangular parallelepiped in order to protect the electric device 120. And the front side is open. An openable door (not shown) is provided on the front side thereof. A plurality of electric devices 120 are installed on the inner wall on the back side facing the door.

Each of the electric devices 120 is provided with a circuit breaker that opens and closes the electric circuit, a circuit breaker that cuts off the current when the current of the electric circuit is excessive, a transformer that changes the voltage, a voltmeter, a measuring device of the current meter, and the like. It is configured. Each of the electric devices 120 is arranged on the inner wall on the back side of the housing 110. The electrical devices 120 are connected to each other by electric wires (not shown). Although not shown, it is connected to an external power supply and a distribution board.

In order to maintain the state in which the electric device 120 operates normally, the switchboard 100 is generally inspected by maintenance personnel on a regular basis such as a visual inspection and a poor contact inspection. The switchboard 100 is provided with a switchboard inspection device 1 in order to automate each of these inspections. Subsequently, the switchboard inspection device 1 will be described.

As shown in FIGS. 1 and 2, the switchboard inspection device 1 includes a rail 10 arranged in the housing 110, a visible light camera 21, an X-ray camera 22, and an infrared camera 23 moving along the rail, and is visible. It includes a camera control unit 30 that controls the operation of the optical camera 21, the X-ray camera 22, and the infrared camera 23, and a main body control unit 40 that transmits and receives data to and from the camera control unit 30.

As shown in FIG. 1, the rail 10 is arranged in front of the inner wall on the back side of the housing 110, and the horizontal rail portions 11 and 12 extending in the left-right direction of the housing 110, that is, in the X direction, and the vertical direction. That is, it has a vertical rail portion 13 extending in the Z direction.

The horizontal rail portions 11 and 12 are fixed to the bottom plate 111 and the top plate 112 of the housing 110, respectively.

On the other hand, the vertical rail portion 13 has rollers (not shown) at the upper end portion and the lower end portion, and these rollers can move the horizontal rail portions 11 and 12 by rotating. Further, the vertical rail portion 13 is connected to a ball screw (not shown) having a screw shaft 15 extending in the X direction. In the vertical rail portion 13, the roller rotates and moves in the X direction due to the rotation of the screw shaft 15.

Further, the vertical rail portion 13 includes a ball screw (not shown) in which the screw shaft 16 extends in the Z direction. A camera holder 14 for holding the visible light camera 21, the X-ray camera 22, and the infrared camera 23 is connected to the ball screw.

The camera holder 14 is formed in a plate shape. The camera holder 14 is supported by a roller (not shown) that can move along the vertical rail portion 13 by rotating. In the camera holder 14, the roller rotates and moves in the Z direction due to the rotation of the screw shaft 16 of the vertical rail portion 13 described above. A visible light camera 21, an X-ray camera 22, and an infrared camera 23 are fixed to the camera holder 14.

In the visible light camera 21, the X-ray camera 22, and the infrared camera 23, the lens is directed toward the rear side. In the visible light camera 21, the X-ray camera 22, and the infrared camera 23, a plurality of electric devices in the power distribution board 100 are obtained by moving the above-mentioned camera holder 14 in the Z direction and the vertical rail portion 13 in the X direction. Of the 120, the electric device 120 at a desired position can be imaged. The visible light camera 21, the X-ray camera 22, and the infrared camera 23 take an image of the electric device 120 according to the instruction of the camera control unit 30.

Here, the visible light camera 21 is a device that generates an image for inspecting the appearance of the electric device 120. The visible light camera 21 detects visible light reflected and emitted by the electric device 120 and generates a visible light image of the electric device 120.

Further, the X-ray camera 22 is a device for generating an image for inspecting the internal state of the electric device 120, and is a device called a backscatter X-ray inspection device. The X-ray camera 22 irradiates the electric device 120 with X-rays and detects the reflection of the X-rays to generate an X-ray image.

The infrared camera 23 is a device for generating an image for inspecting the temperature distribution of the electric device 120, and is an image pickup device called thermography. The infrared camera 23 detects infrared rays emitted by the electric device 120 and generates an infrared image of the electric device 120.

In the present specification, the visible light camera 21 is also referred to as a first camera unit, the X-ray camera 22 is referred to as a second camera unit, and the infrared camera 23 is also referred to as a third camera unit. Further, a set of a visible light camera 21, an X-ray camera 22, and an infrared camera 23 is referred to as an image pickup device.

As shown in FIG. 2, the camera control unit 30 controls the rotation of the motors 35 and 36 that rotate the screw shafts 15 and 16 described above. As a result, the camera control unit 30 moves the camera holder 14 to a desired position. Then, the lenses of the visible light camera 21, the X-ray camera 22, and the infrared camera 23 are brought to face the electric device 120 at the destination. Further, the camera control unit 30 outputs an image pickup signal, causes the visible light camera 21, the X-ray camera 22, and the infrared camera 23 to image the electric device 120, and acquires the image. The camera control unit 30 transmits the image data and the position data of the camera holder 14 at the time of imaging to the main body control unit 40 by wireless means. In this specification, the camera control unit 30 is also referred to as an image pickup control unit.

The main body control unit 40 is realized by the CPU (Central Processing Unit) 80 executing an inspection program stored in the memory 70 shown in FIG. 3 included in the switchboard inspection device 1. As shown in FIG. 2, the main body control unit 40 determines whether or not there is an abnormality in the electric device 120 based on the instruction unit 41 that instructs the camera control unit 30 to take an image and the image data transmitted from the camera control unit 30. A determination unit 42 is provided.

The instruction unit 41 reads out the time data stored in the storage unit 50 in order to confirm the inspection time. The instruction unit 41 transmits an image pickup instruction signal to the camera control unit 30 when the time measured by the time measurement unit (not shown) matches the time data read out. At this time, the instruction unit 41 reads out the position data stored in the storage unit 50 and transmits the read position data to the camera control unit 30. As a result, the instruction unit 41 causes the camera control unit 30 to move the camera holder 14 to the position of the position data. Further, the instruction unit 41 causes the visible light camera 21, the X-ray camera 22, and the infrared camera 23 to take an image at that position.

On the other hand, the determination unit 42 receives the image data of the visible light camera 21, the X-ray camera 22, and the infrared camera 23 transmitted from the camera control unit 30. Further, the position data of the camera holder 14 at the time of imaging is received from the camera control unit 30.

Here, the storage unit 50 stores the normal visible light, X-ray, and infrared image data of the electric device 120 and the abnormal visible light, X-ray, and infrared image data. Each of these image data is associated with the position data 51 of the camera holder 14 shown in FIG. In the position data 51, the XY coordinates of the camera holder 14 indicate the device number of the electric device 120, an image type indicating visible light, X-ray or infrared rays, and whether the image is in a normal state or an abnormal state. The indicated state number and the image number of the image data are associated with each other.

Returning to FIG. 2, the determination unit 42 reads out the normal image data and the abnormal image data associated with the position data 51 of the camera holder 14 at the time of imaging from the storage unit 50. Then, the determination unit 42 compares each received image data with each image data in the normal state. Further, each received image data is compared with each image data at the time of abnormality. When each received image data is closer to each image data at the time of abnormality than each image data at the time of normal, the determination unit 42 determines that the switchboard 100 has an abnormality. The determination unit 42 displays the determination result on the display unit 60. As a result, the determination unit 42 inspects the switchboard 100.

Next, the operation of the switchboard inspection device 1 will be described with reference to FIG.
FIG. 5 is a diagram of a flowchart of the inspection process carried out by the switchboard inspection device 1.

First, when the switchboard 100 is installed, that is, after installation and before operation, each of the electric devices 120 is imaged using the visible light camera 21, the X-ray camera 22, and the infrared camera 23. Alternatively, if maintenance is performed after the switchboard 100 is installed and after operation, the electrical equipment 120 is imaged using the visible light camera 21, the X-ray camera 22, and the infrared camera 23 after the maintenance and before restarting. I will do it. Then, each of the captured visible light, X-ray, and infrared images is stored in the storage unit 50 as a normal image. At this time, the coordinates of the camera holder 14 at the time of imaging are obtained, the position data 51 shown in FIG. 4 is created, and the position data 51 is stored in the storage unit 50. In the normal state image, when maintenance is performed after the switchboard 100 is installed, only the visible light, X-ray, and infrared images captured by the above-mentioned maintenance may be stored in the storage unit 50.

Further, at the time of manufacturing the power distribution board 100, an abnormal electric device 120 such as a poor connection or a poor appearance is arranged on the inner wall on the back side of the housing 110, and the visible light camera 21, the X-ray camera 22 and the infrared camera 23 are used. The electric device 120 is imaged. Then, each of the captured visible light, X-ray, and infrared images is stored in the storage unit 50 as an abnormal time image. Also at this time, the coordinates of the camera holder 14 at the time of imaging are obtained for each image, the position data 51 shown in FIG. 4 is created, and the position data 51 is stored in the storage unit 50.

Further, the storage unit 50 stores the inspection time for inspection.

In this state, the user of the switchboard 100 starts using the switchboard inspection device 1. Specifically, the user presses a start button (not shown) provided in the switchboard inspection device 1 to turn it on. As a result, the inspection program is executed by the CPU 80 shown in FIG. As a result, the flow of the inspection process shown in FIG. 5 is started.

When the flow of the inspection process is started, as shown in FIG. 5, the main body control unit 40 reads the inspection time from the storage unit 50 (step S1). Subsequently, the main body control unit 40 acquires the current time from the timekeeping unit (step S2).

Next, the main body control unit 40 determines whether or not the acquired current time is the inspection time (step S3).

When the main body control unit 40 determines that the current time is the inspection time (Yes in step S3), the main body control unit 40 reads out the position data 51 of the camera holder 14 from the storage unit 50 (step S4).

On the other hand, when the main body control unit 40 determines that the current time is not the inspection time (No in step S3), the main body control unit 40 returns to step S2. As a result, steps S2 and S3 are repeated until the current time reaches the inspection time.

When the position data 51 is read out in step S4, the main body control unit 40 rotates the motors 35 and 36 to move the camera holder 14 to a plurality of coordinates included in the read position data 51, respectively. Further, the main body control unit 40 causes the visible light camera 21, the X-ray camera 22, and the infrared camera 23 to take an image at each position (step S5).

Each time the camera holder 14 moves to the coordinates of the position data 51, the main body control unit 40 acquires the captured visible light, X-ray, and infrared images from the visible light camera 21, the X-ray camera 22, and the infrared camera 23. (Step S6).

Subsequently, the main body control unit 40 receives from the storage unit 50 the visible light, X-ray, and infrared images stored as normal images corresponding to the coordinates of the camera holder 14 shown in the position data 51. Each of the visible light, X-ray, and infrared images stored as an abnormal image is read out (step S7).

The main body control unit 40 compares each of the visible light, X-ray, and infrared images acquired in step S6 with each image of the normal image read out in step S7. In addition, each of the acquired visible light, X-ray, and infrared images is compared with each of the read out abnormal images. Then, it is determined whether or not each of the acquired visible light, X-ray, and infrared images is closer to each image of the abnormal time image than each image of the read normal time image (step S8). This determination is made for each position of the camera holder 14. In addition, it is performed for each acquired visible light, X-ray, and infrared image. Here, the degree of similarity is determined by creating a histogram showing the color distribution of the image and determining whether the histograms are similar to each other, or by determining a plurality of feature points from the image and the distances between the feature points are the same. It is asked depending on whether or not it is. Then, the similarity is determined based on which of the degree of similarity with the normal image and the degree of similarity with the abnormal image is higher.

When the main body control unit 40 determines that any one or more images are more similar to each image of the abnormal time image than each image of the normal time image (Yes in step S8), it is determined that the electric device 120 has an abnormality. judge. Then, the main body control unit 40 displays the abnormality of the electric device 120 on the display unit 60 (step S9). At this time, the main body control unit 40 displays the type of defect from the image type shown in the position data 51.

Specifically, when the main body control unit 40 determines that there is an abnormality in the visible light image, the display unit 60 displays that the appearance is abnormal. When the main body control unit 40 determines that there is an abnormality in the X-ray image, the display unit 60 displays an internal abnormality. When the main body control unit 40 determines that there is an abnormality in the infrared image, the display unit 60 displays it as a thermal abnormality. Further, the main body control unit 40 displays the device number of the electric device 120 on the display unit 60 based on the position data 51.

On the other hand, when the main body control unit 40 determines that any of the images is less similar to each image of the abnormal time image than each image of the normal time image (No in step S8), the process proceeds to step S10.

After displaying the abnormality of the electric device 120 on the display unit 60, the main body control unit 40 determines whether or not the start button is pressed again to turn it off (step S10). When the main body control unit 40 determines that the start button is in the off state (Yes in step S10), the main body control unit 40 ends the inspection process.

On the other hand, when the main body control unit 40 determines that the start button remains on, that is, is not in the off state (No in step S10), the main body control unit 40 returns to step S2 and steps S2 and S3 until the current time reaches the inspection time again. repeat. As a result, the main body control unit 40 periodically inspects the switchboard 100.

If the start button is pressed again to turn off the state while repeating steps S2 and S3, the main body control unit 40 forcibly ends the inspection process.

As described above, in the switchboard inspection device 1 according to the present embodiment, the visible light camera 21, the X-ray camera 22, and the infrared camera 23 are arranged along the vertical rail portion 13 arranged on the front side of each of the electric devices 120. Further, the vertical rail portion 13 moves along the horizontal rail portions 11 and 12 arranged on the front side of each of the electric devices 120. Therefore, in the switchboard inspection device 1, by moving the visible light camera 21, the X-ray camera 22, and the infrared camera 23, it is possible to take an image of a desired electric device 120 among a plurality of electric devices 120.

Further, in the switchboard inspection device 1, the main body control unit 40 displays the images of the visible light camera 21, the X-ray camera 22, and the infrared camera 23 at the time of installation of the electric device 120 in addition to the image at the time of abnormality of the electric device 120. Compare with the normal image of the image or the image at the time of maintenance. Therefore, the normal or abnormal state of the electric device 120 can be inspected more accurately.

In the switchboard inspection device 1, in addition to the image of the visible light camera 21, the images of the X-ray camera 22 and the infrared camera 23 are used to determine the normal or abnormal state of the electric device 120. It is possible to determine whether or not there is an abnormality in the internal state or temperature state. For example, it is possible to detect the heat generation due to poor contact of the electric device 120 and check the presence or absence of an abnormality in the electric device 120.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above embodiment, the rail 10 has horizontal rail portions 11 and 12 and a vertical rail portion 13. However, the present invention is not limited to this. In the present invention, the rail 10 is arranged on the front side of the inner wall where the electric device 120 is installed, and the visible light camera 21, the X-ray camera 22 and the infrared camera 23 move along the rail 10 to be electrically operated. It suffices if the electric device 120 can be imaged facing the device 120. Therefore, for example, the rail 10 may be only the vertical rail portion 13. Further, the rail 10 may be only the horizontal rail portion 11 or 12.

Further, in the above embodiment, the vertical rail portion 13 is supported by the horizontal rail portions 11 and 12, and can move in the horizontal direction. However, the present invention is not limited to this, and the switchboard inspection device 1 may include two vertical rail portions 13 parallel to each other. In this case, the two vertical rail portions 13 may support the horizontal rail portions 11 or 12. Then, it is preferable that the horizontal rail portion 11 or 12 is movable along the two vertical rail portions 13 and is movable in the vertical direction.

In the above embodiment, the switchboard inspection device 1 includes three cameras, a visible light camera 21, an X-ray camera 22, and an infrared camera 23. However, the present invention is not limited to this. In the present invention, the switchboard inspection device 1 may be provided with a camera that can take an image of the electric device 120 facing the electric device 120 by moving along the rail 10, that is, an image pickup device. Therefore, the switchboard inspection device 1 may include only the visible light camera 21 and the infrared camera 23, or may include the visible light camera 21, the X-ray camera 22, or the infrared camera 23. The type of light beam of the image pickup device may be selected according to the inspection item.

In the above embodiment, the main body control unit 40 determines by the similarity of the images. However, the present invention is not limited to this. The main body control unit 40 includes a neural network in which a normal image and an abnormal image are learned as teacher signals, an image is input to the neural network, and the input image is either a normal image or an abnormal image. By classifying the presence or absence by the neural network, it may be determined whether the image is similar to the normal image or the abnormal image.

In the above embodiment, the switchboard inspection device 1 for inspecting the switchboard 100 is described, but the present invention can be applied to all electrical equipment. For example, it can be applied to the inspection of power generation equipment.

1 Switch panel inspection device, 10 rails, 11, 12 horizontal rails, 13 vertical rails, 14 camera holders, 15, 16 screw shafts, 21 visible light cameras, 22 X-ray cameras, 23 infrared cameras, 30 camera controls, 35 , 36 motor, 40 main unit control unit, 41 indicator unit, 42 judgment unit, 50 storage unit, 51 position data, 60 display unit, 70 memory, 80 CPU, 100 switchboard, 110 housing, 111 bottom plate, 112
Top plate, 120 electrical equipment.

Claims (4)

A housing with an inner wall on which electrical equipment is installed,
The rails arranged on the front side of the inner wall and
An image pickup device that can move along the rail and take an image of the electric device facing the electric device.
An image pickup control unit that moves the image pickup device to each of a plurality of positions on the rail and causes the image pickup device to take an image of the electric device.
The image captured by the image pickup device is compared with the image at the time of housing installation or the image at the time of maintenance of the electric device corresponding to each of the plurality of positions, and is compared with the image at the time of abnormality of the electric device. When it is determined that the image captured by the image pickup device is more similar to the image at the time of abnormality than the image at the time of installing the housing or the image at the time of maintenance, the determination unit for determining that the electric device has an abnormality. ,
Equipped with an electrical equipment inspection device. The rail has a vertical rail portion extending in the vertical direction and a horizontal rail portion extending in the horizontal direction.
One of the vertical rail portion and the horizontal rail portion can move along either the vertical rail portion and the horizontal rail portion.
The electrical equipment inspection device according to claim 1. The image pickup device includes a first camera unit that captures a visible light image of the electric device, a second camera unit that captures an X-ray image of the electric device, and a third camera unit that captures an infrared image of the electric device. And have,
The electrical equipment inspection device according to claim 1 or 2. The electric device is a device for a distribution board.
The electrical equipment inspection device according to any one of claims 1 to 3.

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