Lead wire diameter type determination device, determination method, and program

Abstract

Provided are a determination device, a determination method, and a program capable of easily determining the wire diameter type from an image. 【Solution means】The determination device 100 includes an acquisition unit 151 that acquires an image in which a grip supporting a lead wire to be determined is photographed, an image processing unit 152 that estimates the length of the grip portion of the grip by performing image processing on the acquired image, and a determination unit 154 that determines the wire diameter type of the lead wire to be determined based on the estimated length of the grip portion.

Description

Technical Field

[0001] The present invention relates to a determination device, a determination method, and a program for determining the type of lead-in wire diameter.

Background Art

[0002] Depending on the increase or decrease in the contract capacity or the system connection, an operation may be performed to check the state of the lead-in wire connected to the distribution line. In this checking operation, it is necessary for a person in charge to go to the site and visually check, or to request an on-site check from an electrical construction company, which requires a lot of time and labor. In order to solve such problems, it is conceivable to use an image of the lead-in wire taken. As a system using an image of the lead-in wire taken, for example, Patent Document 1 discloses a system for extracting a lead-in wire from an image taken by an unmanned aerial vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the system of Patent Document 1, the image of the extracted lead-in wire is only compared with the reference information showing the shape of the normal lead-in wire, and it is only determined whether the extracted lead-in wire is installed normally, and there is a problem that the type of the diameter of the extracted lead-in wire cannot be grasped. In order to increase or decrease the contract capacity or perform system connection, it is necessary to grasp the type of the lead-in wire diameter in advance so as not to cause the fuse of the lead-in wire due to insufficient heat allowance or the deviation of the allowable voltage drop value in the lead-in wire. Therefore, the development of a method for determining the type of the lead-in wire diameter on a desk is desired.

[0005] The present invention has been made based on such a background, and an object thereof is to provide a determination device, a determination method, and a program capable of easily determining the type of the lead-in wire diameter from an image.

Means for Solving the Problem

[0006] To achieve the above object, the determination device according to the present invention includes an acquisition unit that acquires an image in which a grip for supporting a lead wire to be determined is photographed on a utility pole; an image processing unit that estimates the length of the grip portion of the grip by performing image processing on the acquired image; a determination unit that determines the wire diameter type of the lead wire to be determined based on the estimated length of the grip portion; and 、 The image processing unit calculates a conversion ratio based on the length of the hook portion of the gripper in the image and the length of the hook portion, and estimates the length of the gripper portion based on the calculated conversion ratio and the length of the gripper portion in the image. is provided.

Advantages of the Invention

[0007] According to the present invention, it is possible to provide a determination device, a determination method, and a program capable of easily determining the wire diameter type from an image.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of a determination device, a determination method, and a program according to the present invention will be described in detail with reference to the drawings. In each drawing, the same or equivalent parts are denoted by the same reference numerals.

[0010] The determination device according to the embodiment determines the wire diameter type of the service wire retained by the grip on the utility pole based on an image of the grip that retains the service wire on the utility pole as shown in FIG. 1. Specifically, the dimensions of the grip are estimated by performing image processing on an image of the grip that retains the service wire, and the wire diameter type of the service wire is specified based on the estimated dimensions of the grip. The wire diameter type of the service wire can be specified based on the estimated dimensions of the grip because the dimensions of the grip are different for each wire diameter type. As a result, the operator can determine the wire diameter type without going to the site.

[0011] The service drop is an electric wire that connects the distribution line installed on the utility pole and the indoor wiring of the building. The service drop is connected to the distribution line by a storage connector and is held on the utility pole by a pole-mounted fixture. The service drop diameter types are distinguished by the thickness of the service drop, and the thickness of the insulation coating also varies according to the diameter of the internal conductor (copper wire). Since the heat tolerance and allowable voltage drop values differ depending on the service drop diameter type, it is necessary to select an appropriate service drop diameter type according to the current received by the equipment in the building.

[0012] As the service drop, for example, drop service wires with vinyl insulation (DV) are widely used. There are different types of DV, for example, there are two types: DV and DV-L. DV-L has a newer specification than DV, and since colored wires are inserted at the coated part, the two can be distinguished by appearance.

[0013] The pole-mounted fixture for holding the service drop on the utility pole is composed of, for example, a band, a strap, and a grip. The band is an annular part that is attached to the utility pole by tightening it around the utility pole with a clamping fitting. The band is, for example, a stainless steel band. The strap is a metal fitting that is supported by the band and has a through-hole for attaching the grip.

[0014] As shown in Figure 2, the grip includes a grip part and a hook part connected to the grip part. The hook part is a metalware that is attached to the through-hole of the strap. The length of the hook part is standardized to be a certain length (for example, 210 mm) regardless of the type of grip. The grip part is a part that supports the service drop in a wound state, and is a part formed by forming a part of a bare wire insulated with vinyl chloride or the like into a waveform and then bending it into a U shape. Each of these waveform unevennesses is a grip winding peak, and the number of grip winding peaks in Figure 2 is 7. Each grip differs from each other in at least one of the grip type, thickness, dimensions of the grip part and the hook part, number of grip winding peaks, and grip cap color.

[0015] The grip cap is a cap that is attached to the two tips of the grip and protects the core wire at the tip of the grip. The grip cap is formed of, for example, vinyl chloride and is color-coded to identify the lead wire diameter type. The grip cap colors are, for example, three types: black, gray, and red. The grip types are classified into three types: general use, strong wind use, and current products, due to repeated improvements. The above is the configuration of the lead wire and the pole-mounted device.

[0016] Next, referring to FIG. 3, the hardware configuration of the determination device 100 according to the embodiment will be described. The determination device 100 includes an operation unit 110, a display unit 120, a communication unit 130, a storage unit 140, and a control unit 150. Each unit of the determination device 100 is interconnected via an internal bus (not shown).

[0017] The operation unit 110 receives a user's instruction and supplies an operation signal corresponding to the received operation to the control unit 150. The operation unit 110 includes, for example, a mouse and a keyboard. The display unit 120 displays various images for the user based on the image data supplied from the control unit 150.

[0018] The communication unit 130 is a communication interface for the determination device 100 to communicate with external devices. The communication unit 130 communicates with external devices via a communication network such as the Internet. The communication unit 130 receives image data from, for example, a smartphone or an external server.

[0019] The storage unit 140 includes, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and a hard disk. The storage unit 140 stores programs executed by the control unit 150 and various types of data. Further, the storage unit 140 temporarily stores various types of information and also functions as a work memory for the control unit 150 to execute processing. In the storage unit 140, for example, the allowable current value of the lead-in wire and the upper limit value of the voltage drop are stored. The allowable current value of the lead-in wire is the maximum current value that is allowed to flow through the lead-in wire at all times. The upper limit value of the voltage drop is the upper limit value of the difference in voltage (voltage drop value) caused by flowing through the lead-in wire, and is set to, for example, 2.0V.

[0020] Furthermore, the storage unit 140 includes a grip data storage unit 141, a minimum diameter type data storage unit 142, and a determination target data storage unit 143. As shown in FIG. 4(a), the grip data storage unit 141 stores in advance data (grip data) that defines the dimensions and shape of the grip for each grip type. The grip data includes, for example, the grip length, the hook length, the number of grip ridges, and the grip cap color. The grip length is the length of the grip portion, and the hook length is the length of the hook portion. Also, in the grip data storage unit 141, data regarding the lead-in wire diameter type and the DV type corresponding to the grip type, and a score calculated based on the grip dimensions are stored. The score is a parameter that plays an important role in the determination of the lead-in wire diameter type, and the calculation procedure thereof will be described later.

[0021] As shown in FIG. 4(b), the minimum diameter type data storage unit 142 stores, for each DV type, the minimum diameter type that the lead-in wire to be determined should satisfy, by changing the contract capacity of the consumer who has drawn in the lead-in wire to be determined and the lead-in wire length at regular intervals and calculating the minimum diameter type that the lead-in wire satisfies under each condition. The minimum diameter type that the lead-in wire should satisfy is calculated in advance by the following procedure and stored in the minimum diameter type data storage unit 142.

[0022] First, calculate the minimum wire gauge type such that the current value flowing through one wire of the lead-in wire is equal to or less than the allowable current value of the lead-in wire stored in the storage unit 140. Since the current value flowing through one wire of the lead-in wire can be calculated based on the wire gauge type and the contract capacity of the lead-in wire, the minimum wire gauge type can be calculated using the allowable current value as a threshold value. Next, calculate the minimum wire gauge type such that the voltage drop value calculated based on the contract capacity and the lead-in wire length is equal to or less than the upper limit value of the voltage drop stored in the storage unit 140. Since the voltage drop value can be calculated based on the wire gauge type, the contract capacity, and the lead-in wire length of the lead-in wire, the minimum wire gauge type can be calculated using the upper limit value of the voltage drop as a threshold value. Next, set the larger of the two calculated minimum wire gauge types as the minimum wire gauge type that the lead-in wire should satisfy.

[0023] As shown in FIG. 4(c), the determination target data storage unit 143 stores data (determination target data) related to the lead-in wire to be determined and the grip connected to the lead-in wire in association with the lead-in wire ID (Identification). The lead-in wire ID is an example of identification information individually assigned to the lead-in wire to be determined. The determination target data includes, for example, information related to the contract capacity, the lead-in wire length, the grip length, the hook length, the number of grip turns, the DV type, and the color of the grip cap. The contract capacity and the lead-in wire length may be obtained from the database of the power distribution business operator, and the grip length, the hook length, and the number of grip turns may be obtained by image processing described later. The DV type and the color of the grip cap may be visually determined from the captured image.

[0024] Returning to FIG. 3, the control unit 150 includes a processor and controls each part of the determination device 100. The processor is, for example, a CPU (Central Processing Unit). The control unit 150 executes the determination process of FIG. 8, the image process of FIG. 9, and the comparison process of FIG. 10 by executing the program stored in the storage unit 140. Functionally, the control unit 150 includes an acquisition unit 151, an image processing unit 152, a calculation unit 153, a determination unit 154, a narrowing-down unit 155, and an output unit 156.

[0025] The acquisition unit 151 acquires an image in which the grip supporting the lead-in wire is photographed. Specifically, it acquires a photographed image in which the grip supporting the lead-in wire is photographed, displays it on the display unit 120, and generates a captured image created by capturing a part of the photographed image within a capture range set by the user for the photographed image displayed on the display unit 120.

[0026] The photographed image is, for example, an image photographed by a field worker using a smartphone, or an image acquired by an Internet map service or a mobile mapping system (MMS). The capture range set for the photographed image is selected so as to entirely and without omission include the grip supporting the lead-in wire. The selection of the capture range may be performed by displaying the photographed image on the display unit 120 and having the user operate the operation unit 110 while the program is running.

[0027] The acquisition unit 151 acquires determination target data and stores it in the determination target data storage unit 143 in association with the lead-in wire ID of the lead-in wire to be determined. For the determination target data, the user may operate the operation unit 110 and input it into the input form displayed on the display unit 120. An example of the input form is shown in FIG. 5. For the grip cap color, it may be selected from black, gray, and red. The default for the DV type is DV, and DV-L may be selected as needed. Note that the acquisition of data by the acquisition unit 151 includes not only the case of acquiring data from an external device, but also reading out the data stored in the storage unit 140 onto the memory.

[0028] Returning to FIG. 3, the image processing unit 152 estimates the grip length by performing image processing on the captured image and assists the user in counting the number of grip turns. Specifically, first, the user operates the operation unit 110 to draw a first measurement line on the captured image displayed on the display unit 120 so as to overlap the hook portion of the grip as shown in FIGS. 6(a) and 6(b). When the operation unit 110 receives the operation of drawing the first measurement line, the image processing unit 152 calculates the conversion ratio between the length of the first measurement line and the actual hook length. Since the actual hook length is constant regardless of the grip specification, if the conversion ratio between the length of the first measurement line and the actual hook length is calculated in advance, the grip length can be calculated based on the conversion ratio.

[0029] Next, the user draws a second measurement line on the captured image so as to overlap the grip portion of the grip as shown in FIGS. 6(a) and 6(b). When the operation unit 110 receives the operation of drawing the second measurement line, the image processing unit 152 calculates the grip length based on the length of the second measurement line and the conversion ratio. Even when the resolution and magnification of the captured image obtained by the above procedure are unknown, the grip length can be estimated.

[0030] Next, when the operation unit 110 receives the user's instruction, the image processing unit 152 binarizes at least the portion of the captured image where the grip portion is drawn, and the user counts the number of grip turns based on the binarized image. Since the captured image is binarized, the grip turns are clearly drawn on the display unit 120, and the user can easily count the number of grip turns.

[0031] The calculation unit 153 calculates a score indicating a weighted average based on the hook length stored in the grip data storage unit 141, the grip length estimated by the image processing unit 152, and the number of grip turns counted by the user. The calculation unit 153 stores the calculated score in the determination target data storage unit 143 in association with the draw line ID corresponding to the draw line to be determined.

[0032] In the weighted average calculation by the arithmetic unit 153, a score indicating the weighted average is calculated by directly multiplying three parameters with different units by weights respectively and then dividing by the total value of the weights. Specifically, assuming the grip length, hook length, and the number of grip ridges are L1, L2, and N respectively, and the weights multiplied to each parameter are w1, w2, and w3, the score S indicating the weighted average is expressed by the following formula (1). S=(w1×L1+w2×L2+w3×N) / (w1+w2+w3)…(1)

[0033] Here, each of the weights w1, w2, and w3 is set by adjusting so that the difference in the score S for each grip type becomes large, then creating a normal distribution of the sample data of the score S, and adjusting so that the difference between the score S calculated based on the sample image and the median of the normal distribution of the sample data becomes as small as possible. As an example, w1 = 2, w2 = 1, and w3 = 300 are set.

[0034] The determination unit 154 finally determines the wire diameter type of the wire to be determined by comparing the wire diameter type of the lead-in wire determined based on the score calculated by the arithmetic unit 153 with the minimum wire diameter type of the lead-in wire determined based on the minimum wire diameter type data stored in the minimum diameter type data storage unit 142.

[0035] Specifically, first, the determination unit 154 performs a weighted average determination based on the score calculated by the arithmetic unit 153. In the weighted average determination, the score calculated by the arithmetic unit 153 is compared with the scores for each grip type stored in the grip data storage unit 141, and the grip type that supports the wire to be determined is determined as the one among the scores for each grip type stored in the grip data storage unit 141 that is closest to the score calculated by the arithmetic unit 153. Next, referring to the grip data storage unit 141, the wire diameter type corresponding to the determined grip type is read out. In this determination process, the differences between the score calculated by the arithmetic unit 153 and the scores for each grip type stored in the grip data storage unit 141 are comprehensively calculated, and the grip type that supports the wire to be determined may be determined as the one with the smallest such difference.

[0036] Next, the determination unit 154 performs a voltage drop determination based on the contract capacity and the lead-in wire length acquired by the acquisition unit 151. In the voltage drop determination, with reference to the minimum diameter type data storage unit 142, the minimum diameter type that the lead-in wire to be determined should satisfy is read out based on the contract capacity and the lead-in wire length acquired by the acquisition unit 151.

[0037] Next, the determination unit 154 compares the weighted average determination result with the voltage drop determination result, and when the minimum diameter type by the voltage drop determination is larger than the diameter type by the weighted average determination, the minimum diameter type by the voltage drop determination is used as the final determination instead of the diameter type by the weighted average determination. The reason for giving priority to the voltage drop determination result when the minimum diameter type by the voltage drop determination is larger than the diameter type by the weighted average determination is that in such a case, there is a risk that the voltage and current flowing through the lead-in wire may exceed the specified values.

[0038] The narrowing-down unit 155 narrows down candidates for the grip type estimated to be the grip supporting the lead-in wire to be determined based on the grip cap color and the DV type acquired by the acquisition unit 151. Specifically, since the grip data storage unit 141 stores the correspondence between the grip cap color, the DV type, and the grip type, the candidates for the grip type can be narrowed down based on the input grip cap color and DV type.

[0039] The output unit 156 outputs externally the captured image and the captured image acquired by the acquisition unit 151, the calculation result by the calculation unit 153, the determination result by the determination unit 154, and the narrowing-down result by the narrowing-down unit 155. For example, the output unit 156 causes the display unit 120 to display the captured image and the captured image acquired by the acquisition unit 151. Further, when the user draws the first measurement line so as to overlap with the hook portion of the grip on the captured image, the output unit 156 reads the hook length prestored in the storage unit 140, and causes the display unit 120 to display the value of the hook length (210 mm) near the first measurement line as shown in the captured images of FIGS. 6(a) and 6(b). Also, when the user draws the second measurement line so as to overlap with the grip portion of the grip on the captured image, the output unit 156 causes the display unit 120 to display the value of the calculated grip length (800 mm in FIG. 6(a) and 750 mm in FIG. 6(b)) near the second measurement line as shown in the captured images of FIGS. 6(a) and 6(b).

[0040] Furthermore, the output unit 156 causes the display unit 120 to display a determination result screen showing the calculation result by the calculation unit 153, the determination result by the determination unit 154, and the narrowing-down result by the narrowing-down unit 155. An example of the determination result screen is shown in FIG. 7.

[0041] In the data table on the left side of FIG. 7, data columns of grip length (grip length), metal length (hook length), number of grip ridges (grip coil ridges), and score are arranged vertically for each grip type. Data columns other than "target item" are read from the grip data storage unit 141 and arranged in the order according to the score. On the other hand, the data column of the "target item" with shading moves up and down according to the score value calculated by the calculation unit 153. In FIG. 7, since the score of the target item is between the values of "for strong wind_14" and "for strong wind_38", the data column is arranged between them, and among the grips with a metal length of 210 mm, it is closest to the score of "for strong wind_14". For this reason, in the "weighted average determination" column of the data table on the left side, the grip type is determined to be "for strong wind_14". "Determination: 14" in the data table on the left side and "14" in the "weighted determination" in the right area indicate that the determination result of the drawing-in wire diameter type corresponding to the grip type "for strong wind_14" is "14". Although grips with metal lengths of 150 mm and 180 mm are also included in the data, these grips are all of old specifications and are not used currently, so the comparison between the scores of these grips and the score of the target item is not performed.

[0042] The upper right area of FIG. 7 shows various parameters input by the user into the input form of FIG. 5. Among them, the result of the narrowing-down unit 155 narrowing down the candidates of the grip type using the DV type and the grip cap color is shown in "narrowing down". The right area of FIG. 7 shows the possibility that the grip type is either "14" or "60 - 2".

[0043] The "single-wire current", "voltage-drop current", and "voltage-drop upper limit value" displayed in the middle region of FIG. 7 are the values read from the storage unit 140. In the "allowable current determination", the minimum wire gauge type is displayed for which the current value flowing through a single incoming wire is equal to or less than the allowable current value of the incoming wire. In the "voltage-drop determination", the minimum wire gauge type is displayed for which the voltage-drop value in the incoming wire is equal to or less than the voltage-drop upper limit value. In the "final determination by calculation", the larger wire gauge type of either the allowable current determination or the voltage-drop determination is displayed. In the "confirmation (index)", the value of the cross point in the graph in the lower right region of FIG. 7 is displayed. The graph in FIG. 7 illustrates the data read from the minimum wire gauge type data storage unit 142 in tabular form, with the vertical axis representing the contract capacity and the horizontal axis representing the incoming wire length. The value of the cross point is the minimum wire gauge type determined by the voltage-drop determination and indicates the voltage-drop determination result. In the graph of FIG. 7, since it is color-coded by DV type, the DV type can also be determined accordingly. These calculation results are displayed on the determination result screen together with the calculation result of the weighted average score in order to contribute to the user's final determination of the incoming wire gauge type.

[0044] In the "calculation determination" in the right region of FIG. 7, the same determination result as the "final determination by calculation" is displayed, and in the "weighted average determination", the determination result based on the weighted average score is displayed. In the "comprehensive determination", the "calculation determination" is displayed when the "calculation determination" is larger than the "weighted average determination", and the "weighted average determination" is displayed otherwise. The above is the hardware configuration of the determination device 100.

[0045] (Determination Process) Hereinafter, with reference to the flowchart of FIG. 8, the flow of the determination process executed by the determination device 100 will be described. The determination process starts when the user launches the application.

[0046] First, the user launches a browser to access an Internet map service or imports an image from a smartphone, and displays a captured image in which the lead-in line to be determined is captured on the screen of the display unit 120 of the determination device 100. In this state, when the user launches an application, the captured image is displayed within the window of the application. At this time, the determination device 100 overlays and displays a frame indicating a capture range, which is a range for cutting out a part of the captured image displayed on the display unit 120, on the captured image within the window. The frame can be adjusted in terms of position, size, and shape by the user operating the operation unit 110.

[0047] The user operates the operation unit 110 to adjust the frame so as to include the entire grip that supports the lead-in line to be determined, and sets the capture range. When the operation unit 110 receives an operation for setting the capture range, the acquisition unit 151 acquires a capture image obtained by capturing the entire grip (step S1).

[0048] Next, the image processing unit 152 estimates the grip length by performing image processing on the capture image acquired in the step of step S1, and performs image processing to assist in counting the number of grip coils (step S2). Hereinafter, with reference to FIG. 9, the flow of the image processing executed by the image processing unit 152 will be described.

[0049] (Image Processing) First, the user operates the operation unit 110 to draw a first measurement line so as to overlap the hook portion of the grip on the capture image displayed on the display unit 120. When the operation unit 110 receives an instruction from the user to draw the first measurement line, the image processing unit 152 measures the length of the drawn first measurement line, reads out the hook length stored in advance in the storage unit 140, and calculates a conversion ratio between the length of the first measurement line and the hook length (step S11). At this time, the output unit 156 displays, for example, a value 210 (unit: mm) of the hook length near the first measurement line as shown in the capture image of FIG. 6(a).

[0050] Next, the user operates the operation unit 110 to draw a second measurement line so as to overlap with the grip portion of the grip on the captured image displayed on the display unit 120. When the operation unit 110 receives an instruction from the user to draw the second measurement line, the image processing unit 152 measures the length of the second measurement line and calculates the grip length based on the conversion ratio between the length of the first measurement line and the hook length (step S12). At this time, the output unit 156 causes a value 800 (unit: mm) of the calculated grip length to be displayed near the second measurement line as shown in the captured image of FIG. 6(a), for example.

[0051] Next, the user operates the operation unit 110 to execute a process of binarizing part or all of the captured image acquired in the process of step S1. When the operation unit 110 receives the operation, the image processing unit 152 executes binarization of the captured image (step S13) and returns the process. Thereafter, the user may count the number of grip coils by referring to the binarized image. The above is the flow of image processing.

[0052] When the counting of the number of grip coils is completed, the user causes the input form shown in FIG. 5 to be displayed on the display unit 120 and inputs the data to be determined. Specifically, numerical values of the contract capacity, the lead-in wire length, the hook length, the grip length, and the number of grip coils are input, and the grip cap color and the DV type are selected. When the operation unit 110 receives the operation, the acquisition unit 151 acquires the data to be determined input to the input form and stores it in the data storage unit 143 to be determined in association with the lead-in wire ID (step S3).

[0053] Next, the calculation unit 153 calculates a score indicating a weighted average based on the hook length, the grip length, and the number of grip coils acquired in the process of step S3, and stores the calculated score in the data storage unit 143 to be determined in association with the lead-in wire ID (step S4).

[0054] Next, the determination unit 154 executes a comparison process for determining the wire diameter type of the wire to be determined by comparing the determination result of the wire diameter type based on the score calculated by the calculation unit 153 with the determination result of the wire diameter type based on the minimum diameter type data stored in the minimum diameter type data storage unit 142 (step S5). Hereinafter, with reference to FIG. 10, the flow of the comparison process executed by the determination unit 154 will be described.

[0055] (Comparison Process) First, the determination unit 154 executes a weighted average determination based on the score calculated in the process of step S4 (step S21). Specifically, the score calculated in the process of step S4 is compared with the scores for each grip type stored in the grip data storage unit 141, and among the scores for each grip type stored in the grip data storage unit 141, the one closest to the calculated score is specified as the grip type supporting the wire to be determined and the wire diameter type of the wire to be determined.

[0056] Next, the determination unit 154 executes a voltage drop determination based on the contract capacity and wire length obtained in the process of step S3 (step S22). Specifically, with reference to the minimum diameter type data storage unit 142, the minimum diameter type that the wire to be determined should satisfy is read based on the contract capacity and wire length obtained by the acquisition unit 151.

[0057] Next, the determination unit 154 finally determines the wire diameter type of the wire to be determined by comparing the weighted average determination result from the process of step S21 with the voltage drop determination result from the process of step S22 (step S23). Specifically, when the minimum diameter type by the voltage drop determination is larger than the diameter type by the weighted average determination, it is determined that the minimum diameter type by the voltage drop determination is the wire diameter type of the wire to be determined. On the other hand, when the minimum diameter type by the voltage drop determination is not larger than the diameter type by the weighted average determination, it is determined that the diameter type by the weighted average determination is the wire diameter type of the wire to be determined. The above is the flow of the comparison process.

[0058] Returning to FIG. 8, the narrowing-down unit 155 executes narrowing-down of candidates for the grip type that is presumed to support the lead-in wire to be determined, based on the grip cap color and DV type acquired in the process of step S3 (step S6).

[0059] Next, the output unit 156 outputs the determination result by the process of step S5 and the narrowing-down result by the process of step S6 to the outside (step S7). For example, the output unit 156 may cause the display unit 120 to display a determination result screen as shown in FIG. 7. The user may finally determine the diameter type of the lead-in wire in consideration of the degree of deviation between the comprehensive determination result and the narrowing-down result. The above is the flow of the determination process.

[0060] As described above, the determination device 100 according to the embodiment includes an acquisition unit 151 that acquires an image in which a grip supporting a lead-in wire to be determined on a utility pole is photographed, an image processing unit 152 that estimates the length of the grip portion of the grip by performing image processing on the acquired image, and a determination unit 154 that determines the diameter type of the lead-in wire to be determined based on the number of winding ridges of the grip and the estimated length of the grip portion. Therefore, the diameter type of the lead-in wire can be easily determined from an image in which a grip supporting the lead-in wire to be determined on a utility pole is photographed.

[0061] The present invention is not limited to the above embodiment, and the following modifications are also possible.

[0062] (Modification example) In the above embodiment, the grip length is estimated by performing image processing on the captured image, but the present invention is not limited to this. For example, the grip length may be estimated by performing image processing without performing capture on the photographed image.

[0063] In the above-described embodiment, the user drew the first measurement line and the second measurement line so as to overlap the hook portion and the grip portion of the grip on the captured image. However, the present invention is not limited to this. For example, using techniques such as pattern matching and machine learning, the image processing unit 152 may detect the hook portion and the grip portion of the grip on the captured image and measure the lengths of the detected hook portion and grip on the image.

[0064] In the above-described embodiment, the hook length was constant, and the conversion ratio was calculated using the hook length stored in the storage unit 140 and the length of the first measurement line measured. However, the present invention is not limited to this. For example, if it is found that a hook having a length different from the hook length (210 mm) stored in the storage unit 140 as shown in FIG. 11 (180 mm) is used for some reason such as the remaining old specification hook, the operation unit 110 is operated to rewrite the hook length stored in the grip data storage unit 141 to the determined length, and the conversion ratio may be calculated using the rewritten hook length and the length of the first measurement line.

[0065] In the above-described embodiment, the user counted the number of grip coils by referring to the binarized image. However, the present invention is not limited to this. For example, if the number of grip coils can be counted without binarizing the image, the binarization process may be omitted. Further, using techniques such as pattern matching and machine learning, the image processing unit 152 may be configured to count the number of grip coils based on the binarized image.

[0066] In the above-described embodiment, the user input the hook length and the grip length into the input form. However, the present invention is not limited to this. For example, the control unit 150 of the determination device 100 may cause the hook length and the grip length estimated by the image processing unit 152 to be stored in the determination target data storage unit 143 as numerical values of these parameters.

[0067] In the above-described embodiment, the weighted average score was calculated using the hook length, the grip length, and the number of grip ridges, but the present invention is not limited to this. For example, the weighted average score may be calculated based on the grip length and the number of grip ridges. Further, the wire diameter type corresponding to each grip length may be stored in the storage unit 140, and the wire diameter type of the lead-in wire may be determined based on the grip length estimated by image processing. Further, the number of grip ridges may be further estimated based on the grip length estimated by image processing, and the wire diameter type of the lead-in wire may be determined based on the estimated grip length and the number of grip ridges.

[0068] In the above-described embodiment, the minimum wire diameter type of the lead-in wire to be determined was specified based on the contract capacity and the lead-in wire length, and the wire diameter type of the lead-in wire to be determined was determined by the weighted average score, but the present invention is not limited to this. For example, the process of specifying the minimum wire diameter type of the lead-in wire to be determined may be omitted, and the wire diameter type of the lead-in wire to be determined determined by the weighted average score may be used as the final determination result as it is.

[0069] In the above-described embodiment, the candidates for the grip type to be determined were narrowed down based on the grip cap color and the DV type, but the present invention is not limited to this. The process of narrowing down the candidates for the grip type may be omitted.

[0070] In the above-described embodiment, the processes of calculating the score, reading out the minimum wire diameter type, and narrowing down the candidates were performed in this order, but the present invention is not limited to this. The order of these processes is arbitrary.

[0071] In the above-described embodiment, various data was stored in the storage unit 140 of the determination device 100, but the present invention is not limited to this. For example, all or part of the various data may be stored in an external computer via a communication network.

[0072] In the above-described embodiment, the determination device 100 operates based on a program stored in the storage unit 140. However, the present invention is not limited to this. For example, a functional configuration realized by a program may be realized by hardware.

[0073] In the above-described embodiment, the determination device 100 was, for example, a general-purpose computer. However, the present invention is not limited to this. For example, the determination device 100 may be realized by a computer provided on the cloud.

[0074] In the above-described embodiment, the process executed by the determination device 100 was realized by a device having the above-described physical configuration executing a program stored in the storage unit 140. However, the present invention may be realized as a program, or may be realized as a storage medium on which the program is recorded.

[0075] Also, a program for executing the above-described processing operation may be stored and distributed in a non-temporary recording medium readable by a computer, such as a flexible disk, CD-ROM (Compact Disk Read-Only Memory), DVD (Digital Versatile Disk), or MO (Magneto-Optical Disk). By installing the program in a computer, a device for executing the above-described processing operation may be configured.

[0076] The above-described embodiments are examples, and the present invention is not limited to these. Various embodiments are possible without departing from the gist of the invention described in the claims. The constituent elements described in the embodiments and modification examples can be freely combined. Also, inventions equivalent to the invention described in the claims are included in the present invention.

Explanation of Reference Numerals

[0077] 100 Determination device 140 Storage unit 150 Control unit 151 Acquisition unit 152 Image processing unit 153 Calculation unit 154 Judgment unit

Claims

1. an acquisition unit that acquires an image of a grip that supports the target drop line on the utility pole; an image processing unit that performs image processing on the acquired image to estimate a length of the grip portion of the grip; a determination unit that determines a diameter type of the drop wire based on the estimated length of the grip portion; Equipped with the image processing unit calculates a conversion ratio based on the length of the hook portion of the grip on the image and the length of the hook portion, and estimates the length of the grip portion based on the calculated conversion ratio and the length of the grip portion on the image. Judgment device.

2. The evaluation device further includes a calculation unit that calculates a weighted average score based on the length of the hook portion, the length of the grip portion, and the number of turns of the grip, The determination unit determines a diameter type of the drop line to be determined based on the score calculated by the calculation unit. The determination device according to claim 1 .

3. The determination device includes a storage unit that stores in advance a weighted average score calculated for each drop wire diameter type, the determination unit compares the score calculated by the calculation unit with the scores for each drop wire diameter type stored in the memory unit, and determines that the drop wire diameter type stored in the memory unit that has a score closest to the score calculated by the calculation unit is the drop wire diameter type to be determined. The determination device according to claim 2 .

4. The acquisition unit acquires a contract capacity of a customer that has a service line to be determined and a length of the service line to be determined, the determination unit specifies a minimum diameter type that the drop line to be determined should satisfy based on the acquired contract capacity and the length of the drop line, and if the specified minimum diameter type is greater than the diameter type of the drop line determined based on the score calculated by the calculation unit, sets the diameter type of the drop line to the specified minimum diameter type. The determination device according to claim 2 or 3.

5. A determination method executed by a determination device, acquiring an image of a grip that supports the drop line to be determined on the utility pole; A step of estimating a length of the grip portion of the grip by performing image processing on the acquired image; determining a diameter type of the drop wire based on the estimated length of the grip portion; Including, In the step of estimating the length of the grip portion, a conversion ratio is calculated based on the length of the hook portion of the grip on the image and the length of the hook portion, and the length of the grip portion is estimated based on the calculated conversion ratio and the length of the grip portion on the image. Judgment method.

6. Computer, An acquisition means for acquiring an image of a grip that supports the drop line to be determined on the utility pole; an image processing means for estimating a length of the grip portion of the grip by performing image processing on the acquired image; a determination means for determining a diameter type of the drop wire based on the estimated length of the grip portion; A program for causing the device to function as a the image processing means calculates a conversion ratio based on the length of the hook portion of the grip on the image and the length of the hook portion, and estimates the length of the grip portion based on the calculated conversion ratio and the length of the grip portion on the image. program.

Images