JP6416635B2 - Maintenance order determination apparatus and maintenance order determination method - Google Patents

Description

  The present invention relates to a maintenance order determination apparatus and a maintenance order determination method.

  For facilities that are located in large areas and in large quantities (for example, communication facilities), it is common for maintenance personnel to regularly go to the facility installation locations based on information such as the installation years of the facilities and perform maintenance. It is.

  In order to reduce the cost of maintaining equipment functions and reduce the risk of functional wear and accidents due to equipment deterioration and failure, etc., the equipment is efficiently maintained and the number of equipment that has not been maintained is reduced early. It is important to let In order to reduce the number of unmaintained facilities at an early stage, it is effective to perform maintenance in an order that increases the number of facilities that have undergone maintenance per unit time. . For this reason, for example, a method of preferentially performing maintenance from an area with a high equipment density by using information on the number of equipment for each area can be considered.

Shosuke Sugiura et al., "Human Geography-Its Themes and Challenges", Keio University Press, pp. 127-129, 2005.

  However, with this method, the total travel distance required for maintenance differs depending on whether the equipment is evenly distributed in the area or concentrated in a certain part of the area even in an area with the same equipment density. There will be a difference in the amount of operation.

  This will be described with reference to FIG. For example, as shown in FIG. 5, in the case where the areas and the number of facilities are the same for each of the areas A and B, the facilities in the area A are almost uniformly distributed in the area, and the area B is concentrated in a certain part in the area. The total travel distance required for maintenance is shorter in area B.

  Thus, even if it is an area of the same equipment density, a difference arises in the total moving distance required for maintenance. Therefore, in the method of preferentially performing maintenance from an area with a high equipment density, the efficiency of equipment maintenance is not always good, and as a result, the number of equipment that has not been maintained may not be reduced early. .

  Accordingly, an object of the present invention is to solve the above-described problems and to determine a maintenance order that improves the efficiency of maintenance of equipment for equipment arranged in a wide area.

  In order to solve the above-described problems, a maintenance order determination device that determines a maintenance order indicating which area is to be maintained in order for an area that is a target for maintenance of the equipment, the installation density of each area and the distance between the equipment For each area, calculate the nearest neighbor measure that indicates the degree of congestion or diffusion between the facilities in the area, and calculate the distance between the facilities in the area from the theoretical maximum value of the nearest neighbor measure between the facilities in each area. Calculates the inverse nearest neighbor measure, which is a value obtained by subtracting the nearest neighbor measure, and calculates the density of the congested equipment, which is a value obtained by weighting the equipment density of the area with the value of the inverse nearest neighbor measure of the area. And an order determination unit that determines a maintenance order in which the maintenance order is higher in the area where the density of the density facilities is higher.

  ADVANTAGE OF THE INVENTION According to this invention, the maintenance order which improves the maintenance efficiency of an installation about the installation arrange | positioned in a wide area | region can be determined.

FIG. 1 is a diagram illustrating a configuration example of a maintenance order determination apparatus. FIG. 2 is a flowchart showing a processing procedure of the maintenance order determination apparatus. FIG. 3 is a graph showing a calculation example by the maintenance order determination device. FIG. 4 is a diagram illustrating a computer that executes a maintenance order determination program. FIG. 5 is a diagram illustrating an arrangement example of equipment.

  Hereinafter, embodiments (embodiments) for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

  A configuration example of the maintenance order determination apparatus 10 according to the present embodiment will be described with reference to FIG. In addition, what is subject to maintenance here is, for example, a large number of facilities arranged in a wide area, as represented by infrastructure facilities. The maintenance order determination device 10 is a device that determines from which area maintenance is performed for each area having equipment to be maintained, and includes an input unit 11, an equipment data storage unit 12, a control unit 13, and an output unit. 14.

  The input unit 11 is an interface that accepts input of various parameters used when determining the installation position of the equipment, map information, and the maintenance order.

  The equipment data storage unit 12 stores various data (equipment data) related to equipment to be maintained. The facility data is, for example, the installation position of the above-described facility, map information, or the like.

  The control unit 13 controls the entire maintenance order determination apparatus 10, and includes a parameter setting unit 131, a calculation unit 132, and an order determination unit 136. The efficiency evaluation unit (evaluation unit) 137 indicated by the broken line and the calculation result recording unit 138 may or may not be equipped, and the case of being equipped will be described later.

  The output unit 14 outputs the calculation result by the control unit 13 such as the maintenance order determined by the order determination unit 136.

  Next, the control unit 13 will be described in detail. The parameter setting unit 131 sets parameters used by the calculation unit 132 for various calculations based on an instruction input from the input unit 11. For example, the parameter setting unit 131 sets the equipment, the range on the map, and the area classification that are to be calculated by the calculation unit 132.

  The calculation unit 132 includes a nearest neighbor measure calculation unit 133, an inverse nearest neighbor measure calculation unit 134, and a density facility density calculation unit 135.

  The nearest neighbor measure calculation unit 133 determines the installation density of each facility and the distance between the facilities based on the installation position of the facility read from the facility data storage unit 12, the area classification set by the parameter setting unit 131, and the like. calculate. And the nearest neighbor measure calculation part 133 calculates the nearest neighbor measure (R) which shows the degree of the density | concentration or the spreading | diffusion of the installation of each area based on the installation density for every area, and the distance between installations. The nearest neighbor measure (R) is calculated by the following equation (1).

  In Expression (1), d represents a linear distance (shortest distance) from each facility to the nearest facility, N represents the number of facilities included in the area, and P represents the facility density in the area.

  The nearest neighbor measure (R) calculated by the equation (1) takes a value between the minimum value “0” and the theoretical maximum value “2.149”. When R≈1, a random distribution, R <1 Is determined to be a dense distribution, and when R> 1, it is determined to be a diffuse distribution. In addition, as the distance from R = 1 increases, the degree of concentration or diffusion is considered to be stronger. This nearest neighbor measure (R) indicates that the smaller the value, the more dense the density. From the viewpoint of maintenance efficiency, the shorter the moving distance to the next equipment, that is, the smaller the nearest neighbor measure (R), the better the maintenance efficiency. On the other hand, the equipment density (P) indicates that the larger the value is, the more equipment is included per area. From the viewpoint of maintenance efficiency, the greater the equipment density (P), the better the maintenance efficiency. Therefore, the magnitudes of these two index values have opposite meanings from the viewpoint of improving the efficiency of equipment maintenance.

Therefore, the inverse nearest neighbor measure calculation unit 134 converts the value to a value that decreases as the value of the nearest neighbor measure (R) calculated by the nearest neighbor measure calculation unit 133 increases. For example, the inverse nearest neighbor measure calculation unit 134 converts the value of the nearest neighbor measure (R) calculated by the nearest neighbor measure calculation unit 133 into an inverse nearest neighbor measure (R _r ) using Equation (2). As described above, the inverse nearest neighbor measure calculation unit 134 determines the difference between the maximum value (R _max ) of the nearest neighbor measure of the facility in each area and the nearest neighbor measure (R) of the facility in the area as the inverse nearest neighbor measure (R _r ), The nearest neighbor measure (R) of the facilities in each area can be converted into a value in the reverse order while maintaining the relative distance relationship between the nearest neighbor measures (R) of each area.

R _max in the above equation (2) represents the maximum value of the nearest neighbor measure (R). Note that R _max may be the maximum value of the nearest neighbor measures (R) of each area calculated by the nearest neighbor measure calculation unit 133, or may be the theoretical maximum value of the nearest neighbor measure (R). A certain “2.149” may be used.

This reverse nearest neighbor measure (R _r ) and facility density (P) both indicate that the larger the value, the more advantageous for maintenance efficiency. In this way, the inverse nearest neighbor measure calculation unit 134 calculates the inverse nearest neighbor measure (R _r ) with the value reversed while maintaining the relative distance relationship between the nearest neighbor measures (R) of each area. This makes it easier to weight the equipment density (P) described later.

The inverse nearest neighbor measure calculation unit 134 may use the reciprocal of the nearest neighbor measure (R) (1 / nearest neighbor measure (R)) as the inverse nearest neighbor measure (Rr). The inverse nearest neighbor measure (R _r ) obtained by (1) is a value obtained by reversing the magnitude while maintaining the relative distance relationship between the nearest neighbor measures (R) of each area. Therefore, when the concentrating equipment density calculation unit 135 calculates the concentrating equipment density (P _w ), the inverse nearest neighbor measure (R _r ) obtained by the above equation (2) is used to obtain the maximum density of each area. A density density (P _w ) reflecting the relative distance relationship between the neighbor measures (R) can be obtained.

Next, the density equipment density calculation unit 135 calculates the density density equipment density (P _w ) that is a value obtained by weighting the equipment density (P) of the area with the inverse nearest neighbor measure (R _r ) for each area. To do. For example, the concentration facility density calculation unit 135 calculates the concentration facility density (P _w ) by the following equation (3).

Next, the order determination unit 136 arranges the areas in descending order of the density of density facilities (P _w ) of the areas calculated by the density density density calculator 135 (from the largest value to the smallest value). The maintenance order is determined. In other words, the maintenance order of the areas is determined so that the maintenance order comes first in an area where the density of density facilities (P _w ) is higher. Then, the order determination unit 136 outputs the determined maintenance order via the output unit 14.

  By doing in this way, the maintenance order determination apparatus 10 can determine the maintenance order which improves the maintenance efficiency of an installation about the installation arrange | positioned in a wide area.

  Next, a maintenance order determination procedure by the maintenance order determination device 10 will be described with reference to FIG. It is assumed that the parameter setting unit 131 sets the calculation parameters of the calculation unit 132 in advance.

  First, the nearest neighbor measure calculation unit 133 reads facility data from the facility data storage unit 12 (S1). Then, the nearest neighbor measure calculation unit 133 sets a unit area using the installation position and map information of the equipment included in the read equipment data, the area classification set by the parameter setting unit 131, and the like (S2). .

  Next, the nearest neighbor measure calculation unit 133 calculates the installation density of each facility and the distance between the facilities from the installation location of the equipment included in the read equipment data and the unit area information set in S2. Based on the installation density of the facilities for each area and the distance between the facilities, the nearest neighbor measure (R) of the facilities in each area is calculated (S3).

Next, the inverse nearest neighbor measure calculation unit 134 calculates an inverse nearest neighbor measure (R _r ) for the nearest neighbor measure (R) of each area calculated by the nearest neighbor measure calculation unit 133 (S4).

Then, the density equipment density calculation unit 135 calculates density equipment density (P _w ) that is a value obtained by weighting the equipment density (P) of the area by the inverse nearest neighbor measure (R _r ) for each area. (S5).

Next, the order determining unit 136 determines the maintenance order based on the density of the congested equipment (P _w ) of each area calculated by the density of the congested equipment density calculating unit 135 (S6). For example, the order determination unit 136 determines the density of the density facilities (P _w ) calculated by the density facilities density calculation unit 135 in descending order (from the largest value to the smallest value) as the maintenance order. To do. Then, the order determination unit 136 outputs the determined maintenance order via the output unit 14.

  By doing in this way, the maintenance order determination apparatus 10 can determine the maintenance order that reduces the number of facilities that have not been maintained at an early stage for facilities arranged in a wide area. As a result, it is possible to improve the efficiency of maintenance for facilities arranged in a wide area, and to reduce the risk of malfunction and malfunction of the target facilities due to deterioration and failure of the target facilities.

(Other embodiments)
The maintenance order determination apparatus 10 may further include an efficiency evaluation unit 137 and a calculation result recording unit 138 shown in FIG.

  The efficiency evaluation unit 137 evaluates the maintenance efficiency when the maintenance of the facilities in each area is performed according to the maintenance order determined by the order determination unit 136. For example, the efficiency evaluation unit 137 calculates the number of facilities that have been maintained with respect to the travel time when maintenance is performed according to the maintenance order determined by the order determination unit 136. For example, when the maintenance is executed in the determined maintenance order, it is calculated how much the number of facilities that have not been maintained decreases with respect to the accumulated travel time.

  Similarly, the efficiency evaluation unit 137 also calculates the cumulative travel time when the maintenance is performed in a maintenance order according to another method (for example, in the order of areas with high equipment density (P) or the ascending order of area IDs). On the other hand, calculate how much the number of maintenance-free facilities will decrease. Then, the efficiency evaluation unit 137 compares both values. Then, the comparison result is output via the output unit 14 or recorded in a predetermined area of the storage unit (not shown) by the calculation result recording unit 138.

  In addition to the above comparison results, the efficiency evaluation unit 137 may output various statistical information when the maintenance is performed in each maintenance order via the output unit 14. Alternatively, the information may be converted into a graph or the like and output via the output unit 14.

  The calculation result recording unit 138 records in the storage unit (not shown) the above comparison results and various statistical information when maintenance is performed in the above maintenance order.

As described above, the efficiency evaluation unit 137 compares the maintenance efficiency between the case where the maintenance is performed in the maintenance order based on the density of density facilities (P _w ) in each area and the case where the maintenance is performed in the other maintenance order. This makes it easier for the user of the maintenance order determination apparatus 10 to determine in which maintenance order maintenance should be performed. For example, as a result of the comparison by the efficiency evaluation unit 137, the cumulative movement between the case where the maintenance is executed in the maintenance order based on the density of density facilities (P _w ) of each area and the case where the maintenance is executed in the ascending order of the area ID. When there is not much difference in the rate of decrease in the number of facilities that have not been subjected to maintenance with respect to time, it is possible to determine that maintenance is performed in ascending order of area IDs.

(Calculation example)
Next, a calculation example by the calculation unit 132 will be shown. Here, the calculation unit 132 targets facilities (distributed poles in this case) distributed in a certain prefecture, determines the maintenance order of each area after dividing the area where the facilities are disposed into unit areas. Then, the number of unmaintained facilities (the number of remaining facilities) with respect to the accumulated travel time when the maintenance is performed according to the determined maintenance order was calculated. The calculation results are shown in the graph of FIG.

The unit area used for the calculation is the “half-area mesh” that is about 500 m in length and breadth among the “area meshes” that are defined by JIS in Japan and are most frequently used in geographical mesh division. It was. The horizontal axis of the graph of FIG. 3 indicates the cumulative time required for movement between facilities, and the vertical axis indicates the number of remaining facilities (number of remaining facilities) that are maintenance targets. Here, a method of performing maintenance in the ascending order of IDs of the third mesh used in setting the unit area (numbers are assigned from the southwest corner to the northeast corner), a method of performing maintenance in descending order of equipment density, The calculation results of the three types of methods are compared with the method of performing maintenance in descending order of the density of density facilities (P _w ).

As shown in FIG. 3, the method of performing maintenance in descending order of the density of concentrating facilities (P _w ) has the most convex shape on the lower left side, and is more efficient than the other methods during the maintenance period (travel time) This shows that the number of equipment that has been maintained is good. That is, it is shown that the efficiency (the number of already-maintained facilities with respect to the travel time) is better when the maintenance is performed according to the maintenance order determined by the maintenance order determination apparatus 10 of the present embodiment than in other cases. In this calculation example, the horizontal axis of the graph is the cumulative movement time in each mesh, so the total movement time that finally ends the maintenance of all facilities is the same in each order. Yes.

  According to the maintenance order determination device 10 described above, it is possible to determine a maintenance order that can reduce the number of unmaintained equipment at an early stage for equipment arranged in a wide area. As a result, it is possible to improve the maintenance efficiency of facilities arranged in a wide area, and to reduce the risk of deterioration and failure of the target facilities and malfunctions as a system caused by these.

(program)
In addition, a program (maintenance order determination program) in which processing executed by the maintenance order determination apparatus 10 according to the above embodiment is described in a language that can be executed by a computer can be created and executed. In this case, the same effect as the above-described embodiment can be obtained by the computer executing the program. Further, such a program may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer and executed to execute the same processing as in the above embodiment. Hereinafter, an example of a computer that executes a maintenance order determination program that realizes the same function as the maintenance order determination apparatus 10 will be described.

  FIG. 4 is a diagram illustrating a computer that executes a maintenance order determination program. As shown in FIG. 4, the computer 1000 includes, for example, a memory 1010, a CPU (Central Processing Unit) 1020, a hard disk drive interface 1030, a disk drive interface 1040, a serial port interface 1050, a video adapter 1060, a network Interface 1070. These units are connected by a bus 1080.

  The memory 1010 includes a ROM (Read Only Memory) 1011 and a RAM (Random Access Memory) 1012. The ROM 1011 stores a boot program such as BIOS (Basic Input Output System). The hard disk drive interface 1030 is connected to the hard disk drive 1090. The disk drive interface 1040 is connected to the disk drive 1100. A removable storage medium such as a magnetic disk or an optical disk is inserted into the disk drive 1100, for example. For example, a mouse 1110 and a keyboard 1120 are connected to the serial port interface 1050. For example, a display 1130 is connected to the video adapter 1060.

  Here, as shown in FIG. 4, the hard disk drive 1090 stores, for example, an OS 1091, an application program 1092, a program module 1093, and program data 1094. Each table described in the above embodiment is stored in the hard disk drive 1090 or the memory 1010, for example.

  Further, the maintenance order determination program is stored in the hard disk drive 1090 as a program module in which a command executed by the computer 1000 is described, for example. Specifically, a program module describing each process executed by the maintenance order determination apparatus 10 described in the above embodiment is stored in the hard disk drive 1090.

  Further, data used for information processing by the maintenance order determination program is stored as program data, for example, in the hard disk drive 1090. Then, the CPU 1020 reads out the program module 1093 and the program data 1094 stored in the hard disk drive 1090 to the RAM 1012 as necessary, and executes the above-described procedures.

  Note that the program module 1093 and the program data 1094 related to the maintenance order determination program are not limited to being stored in the hard disk drive 1090. For example, the program module 1093 and the program data 1094 are stored in a removable storage medium and the CPU 1020 via the disk drive 1100 or the like. It may be read out. Alternatively, the program module 1093 and the program data 1094 related to the maintenance order determination program are stored in another computer connected via a network such as a LAN (Local Area Network) or a WAN (Wide Area Network), and the network interface 1070 is stored. Via the CPU 1020.

DESCRIPTION OF SYMBOLS 10 Maintenance order determination apparatus 11 Input part 12 Equipment data storage part 13 Control part 14 Output part 131 Parameter setting part 132 Calculation part 133 Nearest neighbor measure calculation part 134 Inverse nearest neighbor measure calculation part 135 Concentration equipment density calculation part 136 Order determination part 137 Efficiency Evaluation Unit 138 Calculation Result Recording Unit

Claims (3)

A maintenance order determination device that determines a maintenance order indicating which area is to be maintained in order for an area that is subject to maintenance of equipment,
Based on the installation density of each area and the distance between facilities, for each area, the nearest neighbor measure indicating the degree of congestion or diffusion between facilities in the area is calculated, and the theory of the nearest neighbor measure between facilities in each area is calculated. Calculate the inverse nearest neighbor measure, which is the value obtained by subtracting the nearest neighbor measure between facilities in the area from the typical maximum value, and weight the equipment density in the area by the value of the inverse nearest neighbor measure in the area. A calculation unit that calculates a density of a certain density facility;
An order determination unit that determines a maintenance order in which the maintenance order is earlier in an area having a higher value of the density of the concentrating equipment,
A maintenance order determination apparatus comprising: When maintenance of equipment in each area is performed in the determined maintenance order, the number of equipment that has been maintained for the movement time of each equipment, and when maintenance of equipment in each area is executed in a maintenance order other than the determined maintenance order The maintenance order determination device according to claim 1, further comprising: an evaluation unit that compares the number of facilities that have been maintained with respect to the movement time of each facility. A maintenance order determination method that is executed by a maintenance order determination device that determines a maintenance order that indicates which area is to be maintained in order for an area that is subject to maintenance of equipment,
Based on the installation density of each area and the distance between the facilities , the maintenance order determination device calculates, for each area, a nearest neighbor measure indicating the degree of congestion or diffusion between the facilities in the area. The inverse nearest neighbor measure, which is the value obtained by subtracting the nearest neighbor measure between facilities in the area from the theoretical maximum value of the nearest neighbor measure between, is calculated, and the equipment density of the area is calculated as the inverse nearest neighbor measure of the area. Calculating the density of the congested equipment, which is a value weighted by the value;
The maintenance order determination device determines a maintenance order in which the maintenance order is earlier in an area having a higher value of the density of the concentrating equipment, and
A maintenance order determination method characterized by comprising:

Images