JP2022160718A - Connection inspection device - Google Patents

Abstract

To provide a connection inspection device that improves workability of correct/incorrect inspection on a connection between an instrument and a wire.SOLUTION: A connection inspection device 1 performs correct/incorrect inspection on a connection between an instrument 3 and a wire in completion inspection of instrument construction, and comprises: a learning part 20 which uses, as teacher data, a plurality of images including instruments 3 and wires which are correctly connected and a plurality of images including instruments 3 and wires which are incorrectly connected, to learn whether connections between instruments 3 and wires are correct, and constructs a learning model; and a determination part 22 which uses the learning model to determine whether the connection between the instrument 3 and the wire is correct from an input image including the instrument 3 and the wire captured when the construction is completed.SELECTED DRAWING: Figure 1

Description

The present invention relates to a connection inspection device.

There is a meter (watt-hour meter) that is installed on the user side and measures the amount of electricity used (power consumption). In the completion inspection of such new gauge installation or maintenance of gauges, correctness check of connections between gauges and wiring is performed (see, for example, Patent Documents 1 and 2).

For example, the simplest method is to prepare an image of the gauges and wiring at the time of completion and a connection diagram of the check sheet for the completion inspection, and the inspector can connect the images of these gauges and wiring and the check sheet. Visually compare (confirm) with the figure.

Japanese Unexamined Patent Application Publication No. 2020-12672 Japanese Utility Model Publication No. 1-43653

SUMMARY OF THE INVENTION It is an object of the present invention to provide a connection inspection device that improves the workability of correctness inspection of connections between meters and wiring.

A connection inspection apparatus according to the present invention is a connection inspection apparatus that performs correctness/incorrectness inspection of connection between a meter and wiring in a completion inspection of meter construction, and comprises a plurality of images including the meter and the wiring that are correctly connected; A learning unit that learns whether the connection between the instrument and the wiring is correct or incorrect by using a plurality of images including the instrument and the wiring that are incorrect as teacher data, and constructs a learning model; a judgment unit that judges whether the connection between the meter and the wiring is correct or wrong based on the image that is input and includes the meter and the wiring taken at the time of completion of construction.

ADVANTAGE OF THE INVENTION According to this invention, the workability|operativity of the correctness check of the connection of a meter and wiring can be improved.

It is a figure showing a schematic structure of a connection inspection device concerning a 1st embodiment. It is a figure which shows an example of the connection diagram of the check sheet of the completion inspection of low-voltage meter construction. FIG. 10 is a diagram showing an example of an image of a watt-hour meter of a low-voltage meter when construction of the low-voltage meter is completed; It is a figure which shows an example of the connection diagram of the check sheet of the completion inspection of high-voltage instrument construction. It is a figure which shows an example of the image of the meter transformer (terminal box) of the high voltage meter at the completion of the high voltage meter construction. FIG. 4 is a diagram showing an example of an image of a power meter of a high voltage meter at the time of completion of high voltage meter construction. FIG. 4 is a diagram showing an example of an image of a check terminal of a high-pressure meter at the time of completion of high-pressure meter construction.

An example of an embodiment of the present invention will be described below with reference to the accompanying drawings. In each drawing, the same reference numerals are given to the same or corresponding parts.

(First embodiment)
In the first embodiment, correctness inspection of connections between meters and wiring in completion inspection of low-voltage meter construction will be described. Before explaining the correctness check of the connection between the meter and the wiring, the low-voltage meter to be inspected will be described.

FIG. 2 is a diagram showing an example of a wiring diagram of a check sheet for completion inspection of low-voltage instrument construction. As shown in FIG. 2, the low-voltage meter 3 is a transformer including a three-phase three-wire watt hour meter (Watt Hour Meter: WH) 301 and two instrument current transformers (Current Transformer: CT) 302. It is an instrument with a flowmeter.

One instrument current transformer 302 transforms a large current in the first phase distribution line of the three-phase three-wire distribution line into a small current, and the other instrument current transformer 302 transforms the three-phase three-wire distribution line into a small current. A large current in the distribution line of the third phase among the distribution lines is transformed into a small current. A power meter 301 is a meter that measures the amount of power supplied from the power supply side to the load side.

The watt-hour meter 301 has three terminals 1S, 1L, and P1 connected to the current transformer 202 corresponding to the first-phase power line, a terminal P2 connected to the second-phase distribution line, and a third-phase power line. It has seven terminals, three terminals 3S, 3L, and P3 connected to current transformers 202 corresponding to the power lines of .

Distribution cables 305 are connected to seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L of watt-hour meter 301, respectively. These seven distribution cables 305 are color-coded. For example, black, red, blue, brown, yellow, white, and green wiring cables 305 are connected to terminals 1S, P1, P3, 3S, 3L, P2, and 1L, respectively.

The other ends of the black, green, and red distribution cables 305 are connected to the terminals 1S, 1L, and P1 of the current transformer 302 corresponding to the first phase distribution line, respectively, and the brown, yellow, and blue distribution cables 305 are connected to the terminals 1S, 1L, and P1, respectively. The other end is connected to the terminals 3S, 3L, and P3 of the current transformer 302 corresponding to the third phase distribution line, and the other end of the white wiring cable 305 is connected to the terminal P2 of the second phase distribution line. Connected.

FIG. 3 is a diagram showing an example of an image of a watt-hour meter of a low-voltage meter when construction of the low-voltage meter is completed. The watt-hour meter 301 has seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L arranged in a row from the left. Information "1S", "P1", "P3", "3S", "3L", "P2", and "1L" regarding the terminals is provided near each of the terminals 1S, P1, P3, 3S, 3L, P2, and 1L. is displayed. In the vicinity of each of the terminals 1S, P1, P3, 3S, 3L, P2, and 1L, color information of the corresponding distribution cable 305, such as a marker of the color or characters representing the color, is displayed.

Seven distribution cables 305 are connected to seven terminals 1 S, P 1 , P 3 , 3 S, 3 L, P 2 , and 1 L of watt-hour meter 301 . The seven distribution cables 305 are color-coded. The colors of the seven distribution cables 305 are, for example, black, red, blue, brown, yellow, white, and green. The seven wiring cables 305 are in one-to-one correspondence with the seven terminals of the watt-hour meter 301 . Specifically, black, red, blue, brown, yellow, white, and green wiring cables 305 correspond to terminals 1S, P1, P3, 3S, 3L, P2, and 1L of electricity meter 301, respectively.

Similarly, current transformer 302 has three terminals 1S, 1L, P1. Information "1S", "1L" and "P1" about the terminals are displayed near the terminals 1S, 1L and P1. In the vicinity of each of the terminals 1S, 1L, and P1, color information of the corresponding wiring cable 315, such as a marker of the color or characters representing the color, is displayed.

In such a low-voltage meter 3, the operator of the meter installation needs the color information of the wiring cables displayed near the terminals of the watt-hour meter 301 and the terminals of the current transformer 302 as described above, and the wiring cables. Based on the color of 305 and the color of 305, wire connection between watt-hour meter 301 and current transformer 302 (meter 3) and wiring cable 305 is performed. At this time, as in the example of FIG. , and the terminals 3S, 3L, and P3 have the same shape, and the seven distribution cables 305 have the same shape (cross-sectional shape and thickness (diameter)).

Therefore, conventionally, in the completion inspection of meter construction, the correctness of the connection between the watt-hour meter 301 and the current transformer 302 (meter 3) and the wiring cable 305 is checked. For example, as the simplest method, as shown in FIG. 305 and the wiring diagram of the check sheet for the completion inspection as shown in FIG. The images of the instrument 302 (instrument 3) and the wiring cable 305 are visually collated (confirmed) with the wiring diagram of the check sheet.

In this regard, the present embodiment aims to reduce the burden on the inspector and improve the workability of correctness inspection of the connection between the watt-hour meter 301 and the current transformer 302 (instrument 3) and the wiring cable 305. , devised a connection inspection device.

FIG. 1 is a diagram showing a schematic configuration of a connection inspection apparatus according to the first embodiment. The connection inspection device 1 of the first embodiment shown in FIG. 1 performs correctness inspection of the connection between the power meter 301 and the current transformer 302 (meter 3) and the wiring cable 305 in the completion inspection of the meter construction. In the example of FIG. 1, the connection inspection device 1 is arranged on the business side. In this case, when the meter construction is completed, the worker at the construction site takes an image of the power meter 301 (meter 3) and the wiring cable 305 using, for example, the camera of the worker terminal. ) and the image of the distribution cable 305 are transmitted from the operator terminal 5 to the connection inspection apparatus 1 . Also, the current transformer 302 (instrument 3) and the wiring cable 305 are imaged, and the images of the current transformer 302 (instrument 3) and the wiring cable 305 are transmitted from the operator terminal 5 to the connection inspection device 1. FIG. Note that the connection inspection device 1 may be arranged on the construction site side, for example, the worker terminal 5 .

The connection inspection device 1 includes a control section 10 , an input section 12 , an operation section 14 , a storage section 16 , a display section 18 , a learning section 20 and a determination section 22 .

The input unit 12 communicates with the operator terminal 5 and acquires an image of the power meter 301 (meter 3) and the wiring cable 305 and an image of the current transformer 302 (meter 3) and the wiring cable 305. The input unit 12 also acquires images as training data for the learning unit 20, which will be described later. The input unit 12 is composed of, for example, a communication interface device complying with a wireless communication standard or a wired communication standard.

The operation unit 14 is operated by a person in charge on the business side to input information. For example, a person in charge on the business side inputs label information as training data for a learning unit 20 to be described later using the operation unit 14 . The operation unit 14 is configured by, for example, a keyboard or mouse having physical operation buttons, or a touch panel having virtual operation buttons.

The control unit 10 performs overall control of the wire connection inspection device 1 . The control unit 10 (and the learning unit 20 and the determination unit 22, which will be described later), is composed of an arithmetic processor such as a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and an FPGA (Field-Programmable Gate Array). . Various functions of the control unit 10 (and the learning unit 20 and the determination unit 22 to be described later) are realized by executing predetermined software (programs) stored in the storage unit 16, for example. Various functions of the control unit 10 (and the learning unit 20 and the determination unit 22, which will be described later) may be realized by cooperation of hardware and software, or may be realized only by hardware (electronic circuit). .

The storage unit 16 stores predetermined software (program) executed by the control unit 10 (and the learning unit 20 and the determination unit 22, which will be described later). The storage unit 16 also temporarily stores an image and label information as teacher data for the learning unit 20, which will be described later, and a learning model constructed by the learning unit 20. FIG. The storage unit 16 is composed of a rewritable memory such as a ROM (Read Only Memory), an HDD (Hard Disk Drive), or an SSD (Solid State Drive).

The display unit 18 is a display unit that displays information. For example, the display unit 18 displays the determination result of correctness of the connection between the watt-hour meter 301 (meter 3) and the wiring cable 305 by the determination unit 22 described later, and the connection between the current transformer 302 (meter 3) and the wiring cable 305. Displays the judgment result of whether the connection is correct or not. The display unit 18 is composed of, for example, a liquid crystal display or an organic EL display.

The learning unit 20 acquires a trained model by learning using AI (Artificial Intelligence) or by performing deep learning using a neural network with a multilayer (input layer, output layer, intermediate layer) structure. To construct. Among neural networks, a convolutional neural network (CNN) suitable for image recognition (extraction of feature values from an image) is preferable.

According to such an AI or neural network, the connection point between the terminal of the watt-hour meter 301 (instrument 3) and the wiring cable 305 can be extracted by itself from the image of the watt-hour meter 301 (instrument 3) and the wiring cable 305. It is possible to extract the feature amount from the connection point of the image by itself. Similarly, according to such an AI or neural network, from the image of the current transformer 302 (instrument 3) and the wiring cable 305, the connection point between the terminal of the current transformer 302 (instrument 3) and the wiring cable 305 can be determined by itself. It is possible to extract the feature amount from the connection point of the image by itself.

The learning unit 20 teaches a plurality of images of the watt-hour meter 301 (instrument 3) and the wiring cable 305 that are correctly connected and a plurality of images of the watt-hour meter 301 (instrument 3) and the wiring cable 305 that are incorrectly connected. As data, correctness or wrongness of connection between the watt-hour meter 301 (instrument 3) and the distribution cable 305 is learned, and a learning model is constructed. For example, the learning unit 20 receives images of the watt-hour meter 301 (instrument 3) and the wiring cable 305 for which the correctness or incorrectness of the connection is known, and uses the correctness or incorrectness of the connection of the image as a label for the watt-hour meter 301 (instrument 3). and wiring cable 305 are learned.

At this time, for example, as shown in FIG. 3L, P2, 1L and the feature value of the connection point R of the wiring cable 305 are recognized. In addition, the learning unit 20 recognizes the color of the wiring cable 305 as a feature amount in the image of the watt-hour meter 301 (instrument 3) and the wiring cable 305 .

Similarly, the learning unit 20 obtains a plurality of images of the current transformer 302 (instrument 3) and the wiring cable 305 with correct wiring and a plurality of images of the current transformer 302 (instrument 3) and the wiring cable 305 with the incorrect wiring. are used as teaching data, the correctness of the connection between the current transformer 302 (instrument 3) and the distribution cable 305 is learned, and a learning model is constructed. For example, the learning unit 20 receives images of the current transformer 302 (instrument 3) and the wiring cable 305 whose connection is known to be correct or incorrect, and labels the correct/incorrect connection of the image to the current transformer 302 (instrument 3). and wiring cable 305 are learned.

Similarly, the learning unit 20, for example, in the image of the current transformer 302 (instrument 3) and the wiring cable 305, the connection points of the terminals 1S, 1L, and P1 of the current transformer 302 (instrument 3) and the wiring cable 305 Recognize features. Further, the learning unit 20, for example, in the image of the current transformer 302 (instrument 3) and the wiring cable 305, the feature Recognize quantity. In addition, the learning unit 20 recognizes the color of the wiring cable 305 as a feature quantity in the image of the current transformer 302 (instrument 3) and the wiring cable 305 .

The image as teacher data preferably includes a plurality of images with different imaging conditions, considering the imaging conditions that change due to the installation environment of the watt-hour meter 301 or the current transformer 302 (instrument 3). For example, an image as training data preferably includes a plurality of images with different brightness. According to this, even if only a dark image can be captured due to the installation environment of the watt-hour meter 301 or the current transformer 302 (instrument 3), the correct/false feature quantity is extracted from the dark image and learned. be able to.

Also, for example, it is preferable that an image as teacher data includes a plurality of images with different imaging angles. According to this, even if only an image at an oblique imaging angle can be imaged due to the installation environment of the watt-hour meter 301 or the current transformer 302 (instrument 3), correctness can be determined from the oblique imaging angle image. It is possible to extract and learn feature quantities.

The determination unit 22 uses the learning model constructed by the learning unit 20 to determine the power meter from the input image, which is the image of the power meter 301 (meter 3) and the wiring cable 305 captured at the time of completion. The connection between 301 (instrument 3) and distribution cable 305 is checked for correctness or incorrectness.

At this time, for example, as shown in FIG. 3L, P2, 1L and the feature quantity of the connection point R of the distribution cable 305 are recognized. Further, the determination unit 22 recognizes the color of the wiring cable 305 as a feature amount in the image of the watt-hour meter 301 (instrument 3) and the wiring cable 305 .

In addition, using the learning model constructed by the learning unit 20, the determination unit 22 uses the input image, which is the image of the current transformer 302 (instrument 3) and the wiring cable 305 captured at the time of completion, to convert the The connection between the current device 302 (instrument 3) and the wiring cable 305 is checked for correctness or incorrectness.

At this time, the determination unit 22 determines, for example, the connection points between the terminals 1S, 1L, and P1 of the current transformer 302 (instrument 3) and the wiring cable 305 in the image of the current transformer 302 (instrument 3) and the wiring cable 305. Recognize features. Further, the determination unit 22 determines, for example, in the image of the current transformer 302 (instrument 3) and the wiring cable 305, the feature Recognize quantity. Further, the determination unit 22 recognizes the color of the wiring cable 305 as a feature amount in the image of the current transformer 302 (instrument 3) and the wiring cable 305 .

As described above, according to the connection inspection device 1 of the first embodiment, the learning unit 20 uses a plurality of images of the gauge 3 and the wiring for which the correctness or incorrectness of the connection is known as teacher data. The correctness of the connection is learned, and the determination unit 22 uses the learning model to determine the correctness of the connection between the meter 3 and the wiring from the input image, which is the image of the meter 3 and the wiring captured at the time of completion. I do. As a result, the inspector does not have to visually check the image of the gauge 3 and wiring at the time of completion with the wiring diagram on the check sheet, as in the past, and the workability of the completion inspection of the gauge work is improved. can be improved.

(Second embodiment)
In the first embodiment, the correctness test of the connection between the meter and the wiring in the completion inspection of the low-voltage meter construction has been described. 2nd Embodiment demonstrates the correct/wrong inspection of the connection of a meter and wiring in the completion inspection of high voltage meter construction. Before explaining the correctness check of the connection between the meter and the wiring, the high-voltage meter to be inspected will be described.

FIG. 4 is a diagram showing an example of a wiring diagram of a check sheet for completion inspection of high pressure instrument construction. As shown in FIG. 4, the high voltage meter 3 includes a three-phase three-wire watt hour meter (WH) 311, a voltage and current transformer (VCT) 312, and a check terminal ( Check terminal: CT) 313.

The potential transformer 312 includes a potential transformer (Voltage Transformer: VT) and two potential current transformers (Current Transformers: CT). A potential transformer transforms a high voltage in a three-phase, three-wire distribution line from a power supply side to a load side to a low voltage. One instrument current transformer transforms the large current in the first phase distribution line of the three-phase three-wire distribution line into a small current, and the other instrument current transformer transforms the three-phase three-wire distribution line. Among them, the large current in the 3rd phase distribution line is transformed into a small current.

The potential transformer 312 has three terminals P1, P2, and P3 connected to a potential transformer corresponding to a three-phase, three-wire distribution line in a terminal box, and a potential transformer corresponding to a first-phase distribution line. It has seven terminals, two terminals 1S and 1L connected to the current transformer and two terminals 3S and 3L connected to the instrument current transformer corresponding to the third phase distribution line.

The watt-hour meter 311 is a meter that measures the amount of electric power supplied from the power supply side to the load side via the meter transformer 312 and the check terminal 313 . Watt-hour meter 311 has seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L corresponding to seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L of instrument transformer 312, respectively. . Specifically, the watt-hour meter 311 includes three terminals P1, P2, and P3 connected to a potential transformer corresponding to a three-phase distribution line and a potential transformer corresponding to a first-phase distribution line. It has seven terminals, two terminals 1S and 1L connected to the current machine and two terminals 3S and 3L connected to the instrument current transformer corresponding to the third phase distribution line.

The check terminal 313 is an instrument interposed between the watt-hour meter 311 and the instrument transformer 312 and having a plurality of test terminals. Check terminal 313 has seven terminals 1S, P1, P3, 3S, 3L, P2, 1L corresponding to seven terminals 1S, P1, P3, 3S, 3L, P2, 1L of voltage transformer (VCT) 312, respectively. , and seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L corresponding to the seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the electricity meter (WH) 311, respectively.

The seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the instrument transformer 312 and the seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L on the VCT side of the check terminal 313 are They are connected by seven wiring cables 315 respectively. These seven wiring cables 315 are color-coded. For example, black, red, blue, brown, yellow, white, and green wiring cables 315 are connected to terminals 1S, P1, P3, 3S, 3L, P2, and 1L, respectively.

The seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the watt-hour meter 311 and the seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L on the WH side of the check terminal 313 are , are connected by seven distribution cables 316, respectively. These seven distribution cables 316 are color-coded. For example, black, red, blue, brown, yellow, white, and green wiring cables 316 are connected to terminals 1S, P1, P3, 3S, 3L, P2, and 1L, respectively.

Figure 5 is a diagram showing an example of an image of the transformer (terminal box) for the high-pressure instrument at the time of completion of the high-pressure instrument work. FIG. 7 is a diagram showing an example of an image of a watt-hour meter, and FIG. 7 is a diagram showing an example of an image of a check terminal of a high voltage meter at the completion of high voltage meter construction.

As shown in FIG. 5, instrument transformer 312 has seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L arranged in a row from the left in the terminal box. Information "1S", "P1", "P3", "3S", "3L", "P2", and "1L" regarding the terminals is provided near each of the terminals 1S, P1, P3, 3S, 3L, P2, and 1L. is displayed. In the vicinity of each terminal 1S, P1, P3, 3S, 3L, P2, and 1L, color information of the corresponding wiring cable 315, such as a marker of the color or characters representing the color, is displayed.

Seven distribution cables 315 are connected to seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L of instrument transformer 312 . The seven distribution cables 315 are color-coded. The colors of the seven wiring cables 315 are, for example, black, red, blue, brown, yellow, white, and green. The seven distribution cables 315 are in one-to-one correspondence with the seven terminals of the instrument transformer 312 . Specifically, red, blue, and white distribution cables 315 correspond to transformer terminals P1, P3, and P2 of instrument transformer 312, respectively. Black and green wiring cables 315 correspond to current transformer terminals 1S and 1L of instrument transformer 312 . The brown and yellow wiring cables 315 correspond to the current transformer terminals 3S and 3L of the instrument transformer 312 .

As shown in FIG. 6, the watt-hour meter 311 has seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L aligned in order from the left. Information "1S", "P1", "P3", "3S", "3L", "P2", and "1L" regarding the terminals is provided near each of the terminals 1S, P1, P3, 3S, 3L, P2, and 1L. is displayed. Also, near each terminal 1S, P1, P3, 3S, 3L, P2, and 1L, color information of the corresponding wiring cable 316, such as a marker of the color or characters representing the color, is displayed.

Seven distribution cables 316 are connected to seven terminals 1 S, P 1 , P 3 , 3 S, 3 L, P 2 , and 1 L of watt-hour meter 311 . The seven distribution cables 316 are color-coded. The colors of the seven wiring cables 316 are, for example, black, red, blue, brown, yellow, white, and green. The seven wiring cables 316 are in one-to-one correspondence with the seven terminals of the watt-hour meter 311 . Specifically, black, red, blue, brown, yellow, white, and green wiring cables 316 correspond to terminals 1S, P1, P3, 3S, 3L, P2, and 1L of meter 311, respectively.

As shown in FIG. 7, the check terminal 313 has, on the VTH side, seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L arranged in a row from the top. Also, the check terminal 313 has seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L arranged in a row from the top on the WH side. Information "1S", "P1", "P3", "3S", "3L", "P2", and "1L" regarding the terminals is provided near each of the terminals 1S, P1, P3, 3S, 3L, P2, and 1L. is displayed. Also, near each terminal 1S, P1, P3, 3S, 3L, P2, and 1L, color information of the corresponding wiring cable 316, such as a marker of the color or characters representing the color, is displayed.

Seven wiring cables 315 are connected to seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L on the VTH side of the check terminal 313 . The colors of the seven distribution cables 315 are black, red, blue, brown, yellow, white, and green, as described above. The seven wiring cables 315 are in one-to-one correspondence with the seven terminals on the VTH side of the check terminal 313 . Specifically, the black, red, blue, brown, yellow, white, and green wiring cables 315 correspond to the VTH-side terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the check terminal 313, respectively. .

Seven distribution cables 316 are connected to seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L on the WH side of the check terminal 313 . The colors of the seven distribution cables 316 are black, red, blue, brown, yellow, white, and green, as described above. The seven wiring cables 316 are in one-to-one correspondence with the seven terminals on the WH side of the check terminal 313 . Specifically, the black, red, blue, brown, yellow, white, and green wiring cables 315 correspond to the WH-side terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the check terminal 313, respectively. .

In such a high-voltage meter 3, the operator of the meter installation must use the color information of the wiring cable displayed near the terminal of the instrument transformer 312 and near the terminal on the VTH side of the check terminal 313 as described above. , and the color of the wiring cable 315 , the instrument transformer 312 and the check terminal 313 (instrument 3 ) are connected to the wiring cable 315 . At this time, as in one example of FIG. 1S, P1, P3, 3S, 3L, P2, and 1L have the same shape, and the seven distribution cables 315 have the same shape (cross-sectional shape and thickness (diameter)). There is

In addition, as described above, the operator of the meter installation can match the color information of the wiring cable displayed near the terminal of the watt-hour meter 311 and the terminal on the WH side of the check terminal 313 and the color of the wiring cable 316. Based on this, the power meter 311 and the check terminal 313 (instrument 3) are connected to the wiring cable 316 . At this time, the seven terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the watt-hour meter 311 have the same shape, and the seven terminals 1S, P1, P3, 3S, and 3L on the WH side of the check terminal 313 , P2, and 1L have the same shape, and the seven distribution cables 316 have the same shape (cross-sectional shape and thickness (diameter)).

Therefore, conventionally, in the completion inspection of meter construction, the connection between the meter transformer 312 and the check terminal 313 (meter 3) and the wiring cable 315, and the power meter 311 and the check terminal 313 (meter 3) and the wiring cable 316 The correctness check is performed for the connection with the For example, as the simplest method, an image of the instrument transformer 312 and the wiring cable 315 at the time of completion as shown in FIG. 5, and an image of the instrument 311 and the wiring cable 316 at the time of completion as shown in FIG. Prepare an image, an image of the check terminal 313 and the wiring cables 315 and 316 at the time of completion as shown in FIG. 7, and a wiring diagram of the check sheet for the completion inspection as shown in FIG. The images of the instrument transformer 312 and the distribution cable 315, the images of the instrument 311 and the distribution cable 316, and the images of the check terminal 313 and the distribution cables 315 and 316 are visually collated (confirmed) with the wiring diagram of the check sheet. do.

In this regard, in this embodiment, the burden on the inspector is reduced, and the connection between the instrument transformer 312 and the check terminal 313 (instrument 3) and the wiring cable 315, and the watt-hour meter 311 and the check terminal 313 (instrument 3) and the connection with the distribution cable 316, a connection inspection device is devised for the purpose of improving the workability of correctness inspection.

The configuration of the connection inspection device 1 of the second embodiment is the same as the configuration of the connection inspection device 1 of the first embodiment shown in FIG. In addition, in the connection inspection apparatus 1 of the second embodiment, the functions and operations of the learning section 20 and the determination section 22 are different from those of the connection inspection apparatus 1 of the first embodiment.

The connection inspection device 1 of the first embodiment performs connection between the meter transformer 312 and the check terminal 313 (meter 3) and the wiring cable 315, and the power meter 311 and the check terminal 313 ( The connection between the meter 3) and the distribution cable 316 is checked for correctness. In the example of FIG. 1, when the instrument work is completed, a worker at the construction site takes an image of the instrument transformer 312 (instrument 3) and the wiring cable 315 using, for example, a camera of the worker terminal. Images of the instrument 312 (instrument 3) and the distribution cable 315 are transmitted from the operator terminal 5 to the connection inspection device 1. FIG. Also, the power meter 311 (meter 3 ) and the wiring cable 316 are imaged, and the images of the power meter 311 (meter 3 ) and the wiring cable 316 are transmitted from the worker terminal 5 to the connection inspection device 1 . Also, the check terminal 313 (instrument 3) and the distribution cables 315 and 316 are imaged, and the images of the check terminal 313 (instrument 3) and the distribution cables 315 and 316 are transmitted from the operator terminal 5 to the connection inspection device 1. FIG.

As described above, the learning unit 20 performs learning using AI (Artificial Intelligence), or deep learning using a multi-layer (input layer, output layer, intermediate layer) structured neural network. , to build a trained model. Among neural networks, a convolutional neural network (CNN) suitable for image recognition (extraction of feature values from an image) is preferable.

According to such an AI or neural network, from the image of the instrument transformer 312 (instrument 3) and the wiring cable 315, the connection point between the terminal of the instrument transformer 312 (instrument 3) and the wiring cable 315 is extracted by itself. It is possible to extract the feature amount from the connection point of the image by itself. Similarly, according to such an AI or neural network, the connection points between the terminals of the watt hour meter 311 (instrument 3) and the wiring cable 316 can be determined from the images of the watt hour meter 311 (instrument 3) and the wiring cable 316. It is possible to extract the feature amount from the connection point of the image by itself. Similarly, according to such an AI or neural network, from the images of the check terminal 313 (instrument 3) and the wiring cables 315 and 316, the connection points between the terminals of the check terminal 313 (instrument 3) and the wiring cables 315 and 316 can be extracted by itself, and the feature quantity can be extracted by itself from the connection points of the image.

The learning unit 20 generates a plurality of images of the instrument transformer 312 (instrument 3) and the wiring cable 315 with correct wiring and a plurality of images of the instrument transformer 312 (instrument 3) and the wiring cable 315 with the incorrect wiring. is used as teacher data to learn whether the connection between instrument transformer 312 (instrument 3) and wiring cable 315 is correct or incorrect, and a learning model is constructed. For example, the learning unit 20 receives images of the instrument transformer 312 (instrument 3) and the wiring cable 315 whose connection is known to be correct or incorrect, and labels the correct or incorrect connection of the image to the instrument transformer 312 (instrument 3) and the wiring cable 315 are learned.

At this time, for example, as shown in FIG. The feature quantity of the connection point R between 3S, 3L, P2, 1L and the wiring cable 315 is recognized. In addition, the learning unit 20 recognizes the color of the wiring cable 315 in the image of the instrument transformer 312 (instrument 3) and the wiring cable 315 as a feature amount.

Similarly, the learning unit 20 obtains a plurality of images of the watt-hour meter 311 (instrument 3) and the distribution cable 316 that are correctly connected, and a plurality of images of the watt-hour meter 311 (instrument 3) and the distribution cable 316 that are incorrectly connected. is used as teacher data, the correctness of the connection between the watt-hour meter 311 (instrument 3) and the distribution cable 316 is learned, and a learning model is constructed. For example, the learning unit 20 receives images of the watt-hour meter 311 (instrument 3) and the wiring cable 316 for which the correctness or incorrectness of the connection is known as input, and labels the correctness or incorrectness of the connection of the image to the watt-hour meter 311 (instrument 3). and wiring cable 316 is learned.

At this time, for example, as shown in FIG. 3L, P2, 1L and the feature value of the connection point R of the wiring cable 316 are recognized. In addition, the learning unit 20 recognizes the color of the wiring cable 316 as a feature amount in the images of the watt-hour meter 311 (instrument 3) and the wiring cable 316 .

Similarly, the learning unit 20 obtains a plurality of images of check terminal 313 (instrument 3) and wiring cables 315 and 316 with correct wiring and a plurality of images of check terminal 313 (instrument 3) and wiring cables 315 and 316 with incorrect wiring. Using the images as training data, correctness of connection between the check terminal 313 (instrument 3) and the distribution cables 315 and 316 is learned, and a learning model is constructed. For example, the learning unit 20 receives images of the check terminal 313 (instrument 3) and the wiring cables 315 and 316 whose correctness of connection is known as input, and labels the correctness of the connection of the image to the check terminal 313 (instrument 3). and wiring cables 315 and 316 are learned.

At this time, for example, as shown in FIG. 7, the learning unit 20, in the image of the check terminal 313 (instrument 3) and the wiring cables 315 and 316, the VCT side terminals 1S, P1, and P3 of the check terminal 313 (instrument 3) , 3S, 3L, P2, 1L and the wiring cable 315 are recognized. In addition, the learning unit 20 determines that the WH-side terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the check terminal 313 (instrument 3) in the images of the check terminal 313 (instrument 3) and the wiring cables 315 and 316 The feature quantity of the connection point R with the wiring cable 316 is recognized. Further, the learning unit 20 recognizes the colors of the wiring cables 315 and 316 in the images of the check terminal 313 (instrument 3) and the wiring cables 315 and 316 as feature amounts.

Images as training data include a plurality of images with different imaging conditions in consideration of imaging conditions that change due to the installation environment of instrument transformer 312, watt-hour meter 311, or check terminal 313 (instrument 3). and preferred. For example, an image as training data preferably includes a plurality of images with different brightness. According to this, even if only a dark image can be captured due to the installation environment of the instrument transformer 312, the watt-hour meter 311, or the check terminal 313 (instrument 3), the correct/false feature amount can be obtained from the dark image. Can be extracted and learned.

Also, for example, it is preferable that an image as teacher data includes a plurality of images with different imaging angles. According to this, due to the installation environment of instrument transformer 312, watt-hour meter 311, or check terminal 313 (instrument 3), even if only an image at an oblique imaging angle can be imaged, the oblique imaging angle It is possible to extract correct/incorrect feature values from the images and learn them.

Using the learning model constructed by the learning unit 20, the determination unit 22 uses the input image, which is the image of the instrument transformer 312 (instrument 3) and the wiring cable 315 captured at the time of completion, to determine the instrument The connection between the transformer 312 (instrument 3) and the distribution cable 315 is checked for correctness or incorrectness.

At this time, for example, as shown in FIG. The feature quantity of the connection point R between 3S, 3L, P2, 1L and the wiring cable 315 is recognized. Further, the determination unit 22 recognizes the color of the wiring cable 315 as a feature amount in the image of the instrument transformer 312 (instrument 3) and the wiring cable 315 .

In addition, using the learning model constructed by the learning unit 20, the determination unit 22 determines the power The connection between the quantity meter 311 (instrument 3) and the wiring cable 316 is checked for correctness or incorrectness.

At this time, for example, as shown in FIG. 3L, P2, 1L and the feature value of the connection point R of the wiring cable 316 are recognized. Further, the determination unit 22 recognizes the color of the wiring cable 316 as a feature amount in the image of the watt-hour meter 311 (instrument 3) and the wiring cable 316 .

In addition, using the learning model constructed by the learning unit 20, the determination unit 22 uses the input image, which is the image of the check terminal 313 (instrument 3) and the wiring cables 315 and 316 captured at the time of completion, The connection between the check terminal 313 (instrument 3) and the distribution cables 315 and 316 is checked for correctness or incorrectness.

At this time, as shown in FIG. 7, for example, the determination unit 22 determines that terminals 1S, P1, and P3 on the VCT side of the check terminal 313 (instrument 3) are displayed in the image of the check terminal 313 (instrument 3) and the distribution cables 315 and 316. , 3S, 3L, P2, 1L and the wiring cable 315 are recognized. In the image of the check terminal 313 (instrument 3) and the wiring cables 315 and 316, the determination unit 22 determines that the WH side terminals 1S, P1, P3, 3S, 3L, P2, and 1L of the check terminal 313 (instrument 3) The feature quantity of the connection point R with the wiring cable 316 is recognized. Further, the determination unit 22 recognizes the colors of the wiring cables 315 and 316 in the images of the check terminal 313 (instrument 3) and the wiring cables 315 and 316 as feature amounts.

As described above, in the connection inspection apparatus 1 of the second embodiment as well, the learning unit 20 uses a plurality of images of the gauge 3 and the wiring for which the correctness or incorrectness of the connection is known as training data to determine the connection between the gauge 3 and the wiring. Correctness is learned, and the determination unit 22 uses the learning model to determine the correctness of the connection between the meter 3 and the wiring from the input image, which is the image of the meter 3 and the wiring captured at the time of completion. . As a result, the inspector does not have to visually check the image of the gauge 3 and wiring at the time of completion with the wiring diagram on the check sheet, as in the past, and the workability of the completion inspection of the gauge work is improved. can be improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various changes and modifications are possible. For example, in the above-described embodiments, the learning unit (AI or neural network) and the determination unit (learning model) extract the connection points from the image of the instrument and the wiring by themselves. However, the present invention is not limited to this. For example, the control unit performs image processing, extracts an image of the connection point from the image of the instrument and wiring, and supplies the extracted image of the connection point to the learning unit and the determination unit. may be in the form In this case, the learning unit and the determination unit may receive the image of the connection point instead of the image of the instrument and wiring.

1 Wiring inspection device 3 Meters (low pressure meter, high pressure meter)
5 operator terminal 10 control unit 12 input unit 14 operation unit 16 storage unit 18 display unit 20 learning unit 22 determination unit 301 electricity meter 302 instrument current transformer 305, 315, 316 wiring cable (wiring)
311 Watt-hour meter 312 Instrument transformer 313 Check terminal

Claims (8)

A connection inspection device for checking correctness of connection between a meter and wiring in a completion inspection of meter construction,
Using a plurality of images including the instrument and the wiring with correct wiring and a plurality of images including the instrument and the wiring with incorrect wiring as training data, learning whether the wiring between the instrument and the wiring is correct, a learning unit that builds a learning model;
a judging unit for judging whether the connection between the meter and the wiring is correct or wrong, using the learning model, from an input image, which is an image including the meter and the wiring captured at the time of completion;
A connection inspection device comprising: The wiring includes a plurality of wirings of different colors,
The learning unit and the determination unit recognize the color of the wiring as a feature quantity in an image including the instrument and the wiring.
The connection inspection device according to claim 1. 3. The wire connection inspection device according to claim 1, wherein said learning unit and said determination unit recognize a feature quantity of a connection point between a terminal of said meter and said wire in an image including said meter and said wire. The wiring according to any one of claims 1 to 3, wherein the image as the teacher data includes a plurality of images with different imaging conditions in consideration of the imaging conditions that change due to the installation environment of the instrument. inspection equipment. 5. The wire connection inspection device according to claim 4, wherein the image as the training data includes a plurality of images with different brightness. 6. The wire connection inspection device according to claim 4, wherein the image as the teacher data includes a plurality of images captured at different angles. The wiring inspection device according to any one of claims 1 to 6, wherein the meter is a low-voltage meter and includes a watt-hour meter and a current transformer. The wiring inspection device according to any one of claims 1 to 6, wherein the meter is a high-voltage meter and includes a power meter, a transformer having a transformer and a current transformer, and a check terminal.

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