JP7517089B2 - Trolley wire management device, trolley wire management method, and program - Google Patents

Description

The present invention relates to a trolley wire management device, a trolley wire management method, and a program.

Electric trains are supplied with power through contact wires. When this power is supplied, the contact wires come into contact with the pantographs installed on the trains, and so gradually wear down. For this reason, when the remaining diameter of the contact wire falls below a certain value, it becomes necessary to replace the contact wire.

Patent Document 1 describes detecting wear areas on overhead wires by processing inspection images of the overhead wires. In Patent Document 1, multiple methods for detecting wear areas are prepared. Then, the most suitable wear area detection method is selected for each of the multiple inspection images.

JP 2020-037356 A

In order to determine a replacement schedule for a contact wire, it is desirable to predict the remaining diameter and wear of the contact wire. In this case, it is preferable to predict the remaining diameter and wear for each unit length in the extension direction of the contact wire. On the other hand, contact wires are replaced in predetermined sections, such as between utility poles, and are therefore almost always managed in this section unit. For this reason, simply indicating the position where the remaining diameter and wear are expected to meet the replacement criteria for the contact wire using the above-mentioned unit length makes it difficult to ensure that the manager of the contact wire is fully aware of that position.

One of the objectives of the present invention is to make it easier for the manager of a contact wire to recognize the position where the remaining diameter or wear amount is expected to meet the replacement criteria for the contact wire when the remaining diameter or wear amount of the contact wire is predicted for each unit length that is relatively small.

According to the present invention, a prediction means for calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of a contact wire installed on a railway line after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output means for performing an output using the predicted value;
Equipped with
The contact wire is managed in sections that are longer than the intervals between the plurality of positions,
The output means selects the position where the predicted value meets a criterion as a caution position, and outputs information indicating the section including the caution position.

According to the present invention, a computer
a calculation step of calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of a contact wire installed on a rail track after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output step of performing an output using the predicted value;
The contact wire is managed by dividing it into sections longer than the intervals between the plurality of positions,
There is provided a contact wire management method, in which, in the output step, the computer selects the position where the predicted value meets a criterion as a caution position, and outputs information indicating the section including the caution position.

According to the present invention, a computer includes:
A prediction process for calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of a contact wire installed on a rail track after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output process for performing an output using the predicted value;
The contact wire is managed by dividing it into sections longer than the intervals between the plurality of positions,
A program is provided in which the output process selects the position where the predicted value meets a criterion as a caution position, and outputs information indicating the section including the caution position.

The present invention makes it easier for managers of contact wires to recognize the positions where the remaining diameter and wear are expected to meet the replacement criteria for the contact wire.

2 is a diagram illustrating an example of a functional configuration of a trolley wire management device according to an embodiment. FIG. FIG. 2 is a diagram illustrating an example of a data configuration stored in a data storage unit. FIG. 11 is a diagram illustrating an example of information output by an output unit. FIG. 2 is a diagram illustrating an example of a hardware configuration of a trolley wire management device. 4 is a flowchart showing a first example of a process performed by the trolley wire management device. 10 is a flowchart showing a second example of a process performed by the trolley wire management device.

The following describes an embodiment of the present invention with reference to the drawings. Note that in all drawings, similar components are given similar reference numerals and descriptions will be omitted where appropriate.

Figure 1 is a diagram showing an example of the functional configuration of a trolley wire management device 10 according to an embodiment. The trolley wire management device 10 shown in this figure includes a prediction unit 110 and an output unit 120.

The prediction unit 110 uses the measurement results for at least a portion of the trolley wire installed on the track to calculate a predicted value of the remaining diameter or wear amount (hereinafter referred to as the remaining diameter) of the trolley wire after a predetermined time has elapsed. The area of the trolley wire for which the predicted value is calculated is at least the portion described above. The prediction unit 110 then calculates the predicted value for each of multiple positions included in the target area.

As described below, when calculating the predicted value of the remaining diameter of the trolley wire, the prediction unit 110 uses the results of measurements of the trolley wire or data processed from these measurements. Measurements of the trolley wire are performed periodically. The "predetermined time" for calculating the predicted value is defined as an integer multiple of the unit time, for example, the measurement interval.

The output unit 120 performs output using the predicted value calculated by the prediction unit 110. The trolley wire is replaced in units of a predetermined section, for example, between utility poles, and is therefore managed in units of this section. This section is longer than the interval between the multiple positions described above. The output unit 120 then selects a position where the predicted value meets a criterion as a position requiring caution, and outputs information indicating the section including the position requiring caution. For example, if the predicted value indicates the remaining diameter, the position requiring caution is a position where the predicted value is equal to or smaller than a first criterion value. Also, if the predicted value indicates the amount of wear, the position requiring caution is a position where the predicted value is equal to or larger than a second criterion value. The output by the output unit 120 is performed, for example, on a display viewed by a person in charge of the trolley wire.

The length of the section when managing the trolley wire is, for example, several tens of meters or more. On the other hand, the interval between the positions for which the predicted value is calculated is, for example, 1 m or less, preferably 50 cm or less, and more preferably 10 cm. For this reason, even if information showing the above-mentioned caution positions is output as is, it is difficult for the person in charge of managing the trolley wire to grasp the positions. In contrast, in this embodiment, the output unit 120 outputs information showing the section including the caution positions, as described above. Therefore, it is easy for the person in charge of managing the trolley wire to grasp the positions.

Note that each of the above-mentioned positions and sections of the contact wire is defined (managed) using, for example, the distance from a reference point. This definition is stored, for example, in the data storage unit 130. Therefore, when a position requiring caution is identified, the output unit 120 can identify the section that includes the position requiring caution.

It is also preferable that the intervals between the positions for which the predicted values are calculated are equal. However, the above-mentioned sections related to the management of the contact wire are often different from each other.

In this embodiment, the prediction unit 110 calculates the above-mentioned predicted value using a model generated by machine learning. This model is stored in the model storage unit 140. The model is generated, for example, using a device different from the trolley wire management device 10. The objective variable (output) of this model is the above-mentioned predicted value. On the other hand, the items of the explanatory variables (input) of this model will be described later using other figures.

The input values (specific values of explanatory variables) used by the prediction unit 110 are stored in the data storage unit 130. These input values are, for example, data measured when a maintenance vehicle runs on the track, or values obtained by processing this data. The data configuration of the data storage unit 130 will also be described later using other figures.

2 is a diagram showing an example of the data configuration stored in the data storage unit 130. The data storage unit 130 stores the measurement results and/or data processed from the measurement results, i.e., the input values used by the prediction unit 110, for each measurement timing and measurement position (e.g., distance from a reference point). The measurement timing is managed, for example, in units of years, months, and days. The measurement position is defined, for example, as the distance from a reference point in the extension direction of the track (i.e., the extension direction of the trolley wire). The input values stored in the data storage unit 130 (i.e., explanatory variables used in the model stored in the model storage unit 140) are, for example, the remaining diameter (or wear amount) at the time of measurement, the speed of the vehicle at the time of measurement, the height of the trolley wire at the time of measurement, the position of the pantograph where the trolley wire was in contact at the time of measurement (the position in the width direction of the track), the contact pressure between the pantograph and the trolley wire at the time of measurement, and the presence or absence of predetermined parts around the measurement position. The "parts" here are, for example, specific connectors, but are not limited to this.

The measurement results may be processed by the trolley wire management device 10 or by a device other than the trolley wire management device 10.

Figure 3 is a diagram showing an example of information output by the output unit 120. In the example shown in this figure, the output unit 120 outputs a chart. In this chart, the horizontal axis indicates the distance from a reference point in the extension direction of the contact wire, and the vertical axis indicates the remaining diameter (or wear amount). Note that in this figure, the distance shown on the horizontal axis is shown as the number of unit sections. In this figure, the remaining diameter (or wear amount) is displayed as the current actual measurement value, the predicted value after a specified time has passed, and the actual measurement value from a specified time ago (for example, four times ago).

The output unit 120 also includes in this chart, or in association with this chart, an indication showing sections including positions requiring caution. Specifically, the output unit 120 places a specified mark (e.g., a line of a specific color) on the portion of the horizontal axis that corresponds to the section including the positions requiring caution. By checking the position of this mark displayed on the display, the manager of the trolley wire can ascertain the position where internal wear of the trolley wire is progressing.

In this figure, when the user selects a specific position using a cursor or the like (for example, by hovering the cursor over it), the output unit 120 may display detailed information about the trolley wire at that position on a display or the like. The detailed information displayed here may be, for example, at least a portion of the information stored in the data storage unit 130 (including, for example, the distance from the reference point to the measurement position), or may be the actual measurement value of the remaining diameter at a timing not shown on the chart (for example, the previous, second, and third times before).

The display format of the information output by the output unit 120 is not limited to the example shown in FIG. 3. For example, the output unit 120 may display the information in a table format. In this case, the value corresponding to the caution position is displayed in a different format (e.g., highlighted display) from the other positions.

Figure 4 is a diagram showing an example of the hardware configuration of the trolley wire management device 10. The trolley wire management device 10 has a bus 1010, a processor 1020, a memory 1030, a storage device 1040, an input/output interface 1050, and a network interface 1060.

The bus 1010 is a data transmission path for the processor 1020, memory 1030, storage device 1040, input/output interface 1050, and network interface 1060 to transmit and receive data to and from each other. However, the method of connecting the processor 1020 and other components to each other is not limited to a bus connection.

The processor 1020 is a processor realized by a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit).

Memory 1030 is a main storage device realized by RAM (Random Access Memory) or the like.

The storage device 1040 is an auxiliary storage device realized by a hard disk drive (HDD), a solid state drive (SSD), a memory card, or a read only memory (ROM). The storage device 1040 stores program modules that realize each function of the trolley wire management device 10 (e.g., the prediction unit 110 and the output unit 120). The processor 1020 loads each of these program modules into the memory 1030 and executes them, thereby realizing each function corresponding to the program module. The storage device 1040 also functions as the data storage unit 130 and the model storage unit 140.

The input/output interface 1050 is an interface for connecting the trolley wire management device 10 to various input/output devices.

The network interface 1060 is an interface for connecting the trolley wire management device 10 to a network. This network is, for example, a LAN (Local Area Network) or a WAN (Wide Area Network). The network interface 1060 may connect to the network via a wireless connection or a wired connection. The trolley wire management device 10 may receive measurement results and/or data processed from the measurement results related to the trolley wire via the network interface 1060.

Figure 5 is a flowchart showing a first example of processing performed by the trolley wire management device 10. The trolley wire management device 10 performs the processing shown in this figure, for example, each time a specific input is made by a user of the trolley wire management device 10 (e.g., a trolley wire manager).

First, the prediction unit 110 of the trolley wire management device 10 reads out measurement results from a predetermined period ago from the data storage unit 130 among the measurement results related to the trolley wire and/or data obtained by processing the measurement results (hereinafter referred to as measurement results). Here, the predetermined period may be stored in advance by the prediction unit 110, or may be input by the user of the trolley wire management device 10 (step S10). The prediction unit 110 also reads out a model from the model storage unit 140. Note that in step S10, the user may directly specify the measurement results to be read out.

The prediction unit 110 then inputs the measurement results read from the data storage unit 130 into the model read from the model storage unit 140, thereby calculating a predicted value of the remaining diameter of the trolley wire for each of the multiple positions of the trolley wire (step S20). However, only one predicted value is calculated for each position. Here, as described above, the interval between the positions for which the predicted values are calculated is, for example, 1 m or less, which is longer than the section in which the trolley wire is managed. In other words, one section includes multiple positions for which predicted values are calculated (step S20).

The output unit 120 then uses the predicted value calculated in step S20 to select a position requiring caution. As described above, for example, if the predicted value indicates the remaining diameter, the position requiring caution is a position where the predicted value is equal to or less than a reference value (step S30). The output unit 120 then identifies a section including the position requiring caution (step S40) and generates output information indicating this identified section. An example of the output information is the chart shown in FIG. 3 (step S50). The output unit 120 then outputs the output information. As described above, an example of the output destination of the output information is a display viewed by the manager of the trolley line (step S60).

Figure 6 is a flowchart showing a second example of the processing performed by the trolley wire management device 10. The flowchart shown in this figure is the same as that shown in Figure 5, except for the following points.

First, the prediction unit 110 reads out the measurement results at multiple timings. In other words, the prediction unit 110 reads out the measurement results before the first period, the measurement results before the second period, and so on (step S12). Next, the prediction unit 110 calculates the predicted value of the remaining diameter of the trolley wire after a predetermined time has passed multiple times using the measurement results at each of the multiple timings. The "predetermined period" here is the same value for each of the multiple timings. In other words, the prediction unit 110 calculates the predicted value of the remaining diameter of the trolley wire after the same time has passed from the present (for example, one month later) for each of the multiple positions of the trolley wire, for each of the multiple measurement results measured at different timings (step S22). At this time, the models used by the prediction unit 110 may be prepared for each of the multiple timings.

Then, the output unit 120 selects a location requiring caution using the multiple predicted values. For example, the output unit 120 selects the worst value (e.g., the minimum value of the predicted remaining diameter) from the multiple predicted values, and selects the location as a location requiring caution if the worst value meets a criterion (step S30). This process means that a location where at least one predicted value meets the criterion is selected as a location requiring caution.

The subsequent processing is as described using Figure 5.

As described above, according to this embodiment, the trolley wire management device 10 uses the measurement results of the trolley wire to calculate a predicted value of the remaining diameter of the trolley wire after a predetermined time has elapsed for each of multiple positions on the trolley wire. Meanwhile, the trolley wire is managed in multiple sections, and these sections are longer than the intervals between the positions for which the predicted values are calculated. Therefore, when there is a position where the predicted value meets the criteria (position requiring caution), the output unit 120 selects the section including the position requiring caution and outputs information indicating the special exception section. Therefore, the trolley wire manager can easily recognize the positions (sections) where the remaining diameter or wear amount is expected to meet the trolley wire replacement criteria.

The above describes the embodiments of the present invention with reference to the drawings, but these are merely examples of the present invention, and various configurations other than those described above can also be adopted.

In addition, in the multiple flow charts used in the above explanation, multiple steps (processing) are described in order, but the order of execution of the steps performed in each embodiment is not limited to the order described. In each embodiment, the order of the illustrated steps can be changed to the extent that does not cause any problems in terms of content. In addition, each of the above-mentioned embodiments can be combined to the extent that the content is not contradictory.

A part or all of the above-described embodiments may be described as, but is not limited to, the following supplementary notes.
1. A prediction means for calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of a contact wire installed on a railroad track after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output means for performing an output using the predicted value;
Equipped with
The contact wire is managed in sections that are longer than the intervals between the plurality of positions,
The output means selects the position where the predicted value meets a criterion as a caution position, and outputs information indicating the section including the caution position.
2. In the trolley wire management device described in 1 above,
The prediction means calculates the predicted value for each of the plurality of measurement results at different timings,
The output means selects the caution position using a plurality of the predicted values.
3. In the trolley wire management device described in 2 above,
The output means is a trolley wire management device that designates the position where at least one of the predicted values meets the criterion as the caution position.
4. In the trolley wire management device according to any one of 1 to 3 above,
The output means includes:
outputting a chart in which the horizontal axis indicates the extending direction of the contact wire;
A trolley wire management device that includes in the chart an indication of the section including the caution location.
5. In the trolley wire management device according to any one of 1 to 4 above,
The prediction means calculates the measurement value using a model that uses the measurement result as at least a part of an input and outputs the predicted value.
6. The computer:
a calculation step of calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of a contact wire installed on a rail track after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output step of performing an output using the predicted value;
The contact wire is managed by dividing it into sections longer than the intervals between the plurality of positions,
A contact wire management method, in which in the output step, the computer selects the position where the predicted value meets a criterion as a caution position, and outputs information indicating the section including the caution position.
7. In the contact wire management method described in 6 above,
The computer includes:
In the prediction step, the predicted value is calculated for each of a plurality of the measurement results at different times;
A contact wire management method, in which in the output step, the caution position is selected using a plurality of the predicted values.
8. In the contact wire management method described in 7 above,
The computer, in the output process, designates the position where at least one of the predicted values meets the criterion as the caution position.
9. In the contact wire management method according to any one of claims 6 to 8,
In the output process, the computer
outputting a chart in which the horizontal axis indicates the extending direction of the contact wire;
A contact wire management method comprising the step of including in the chart an indication of the section including the caution location.
10. In the contact wire management method according to any one of claims 6 to 9,
A contact wire management method, wherein in the prediction step, the computer calculates the measurement value using a model that uses the measurement result as at least a part of an input and outputs the predicted value.
11. On the computer:
A prediction process for calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of a contact wire installed on a rail track after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output process for performing an output using the predicted value;
The contact wire is managed by dividing it into sections longer than the intervals between the plurality of positions,
The output process selects the position where the predicted value meets a criterion as a caution position, and outputs information indicating the section including the caution position.
12. In the program according to 11 above,
The prediction process calculates the predicted value for each of a plurality of the measurement results at different times,
A program in which the output process selects the caution position using a plurality of the prediction values.
13. In the program according to 12 above,
The output process is a program that designates the position where at least one of the predicted values satisfies the criterion as the caution position.
14. In the program according to any one of claims 11 to 13,
The output process includes:
outputting a chart in which the horizontal axis indicates the extending direction of the contact wire;
A program for causing the chart to include a display showing the section including the caution location.
15. In the program according to any one of claims 11 to 14,
The prediction process calculates the measurement value using a model that uses the measurement result as at least a part of an input and outputs the predicted value.

10 Trolley wire management device 110 Prediction unit 120 Determination unit 130 Data storage unit 140 Model storage unit

Claims (6)

a prediction means for calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of the contact wire installed on the track after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output means for performing an output using the predicted value;
Equipped with
The contact wire is managed in sections that are longer than the intervals between the plurality of positions,
The output means selects the position where the predicted value satisfies a criterion as a caution position, and outputs information indicating the section including the caution position ;
The prediction means calculates the predicted value for each of the plurality of measurement results at different timings,
The output means selects the caution position using a plurality of the predicted values . The trolley wire management device according to claim 1 ,
The output means is a trolley wire management device that designates the position where at least one of the predicted values meets the criterion as the caution position. In the trolley wire management device according to claim 1 or 2 ,
The output means includes:
outputting a chart in which the horizontal axis indicates the extending direction of the contact wire;
A trolley wire management device that includes in the chart an indication of the section including the caution location. In the trolley wire management device according to any one of claims 1 to 3 ,
The prediction means calculates the predicted value using a model in which the measurement result is at least a part of an input and the predicted value is an output. The computer
Using the measurement results for at least a portion of the contact wire installed on the track, a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in the at least a portion of the contact wire is calculated after a predetermined time has elapsed;
An output is performed using the predicted value.
The contact wire is managed in sections that are longer than the intervals between the plurality of positions,
The computer includes :
selecting the location where the predicted value satisfies a criterion as a caution location, and outputting information indicating the section including the caution location;
Calculating the predicted value for each of a plurality of the measurement results at different times;
A contact wire management method, comprising: selecting the caution position by using a plurality of the predicted values . On the computer,
A prediction process for calculating a predicted value of a remaining diameter or a wear amount at each of a plurality of positions included in at least a portion of a contact wire installed on a rail track after a predetermined time has elapsed, using a measurement result of the at least a portion of the contact wire;
an output process for performing an output using the predicted value;
The contact wire is managed by dividing it into sections longer than the intervals between the plurality of positions,
The output process includes selecting the position where the predicted value satisfies a criterion as a caution position, and outputting information indicating the section including the caution position ;
The prediction process calculates the predicted value for each of a plurality of the measurement results at different times,
A program in which the output process selects the caution position using a plurality of the prediction values .

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