JP5809105B2 - Maintenance method selection device, maintenance method selection method and program - Google Patents

Description

  The present invention relates to a maintenance method selection device that selects a maintenance method to be performed on a plurality of facilities.

  The convenience of modern life is supported by many facilities installed from factories and office buildings to homes. This equipment is subjected to maintenance such as inspection and maintenance work in order to maintain the expected functions. This maintenance is mainly performed based on usage time and a fixed inspection interval (hereinafter referred to as “time-based maintenance”), and based on risk assessment (hereinafter referred to as “risk-based maintenance”). (Refer to Non-Patent Document 1, for example).

  Specifically, the time-based maintenance is a process for formulating a maintenance plan based on an event that a target facility cannot maintain a predetermined function as time passes or when a predetermined time elapses. For this reason, for example, if the years of use of the equipment to be maintained and the time interval for performing maintenance are determined, the operation can be basically performed without using a standard other than time. Most of the inspections stipulated by law, so-called legal inspections, are time-based maintenance.

  Risk-based maintenance, on the other hand, evaluates the importance and urgency of maintenance for each part of the equipment and installation area, and assigns priorities, and formulates a maintenance plan based on the results. (For example, refer to Patent Documents 1 to 3.) As a result, safety measures such as reducing the probability of accidents and minimizing the impact of accidents for high-risk facilities and extending the inspection cycle for low-risk facilities, for example. In addition, it can be expected that the cost can be reduced while maintaining or improving the reliability.

  Until now, time-based maintenance has been performed on many facilities. However, in recent years, more efficient maintenance has been demanded, veteran engineers who have performed time-based maintenance based on abundant experience have retired in large numbers, and it is difficult to inherit technology from such veteran engineers. Therefore, the transition from time-based maintenance to risk-based maintenance is desired.

  However, when trying to shift from time-based maintenance to risk-based maintenance, the following problems occur.

  For example, time-base maintenance and risk-based maintenance have different maintenance plan formulation principles as described above, and therefore data required for implementation, maintenance procedures, inspection items, and the like may be different. Attempting to change them can cause operational problems. For example, in order to implement risk-based maintenance, it is necessary to evaluate the importance and urgency of maintenance for each part of the equipment, but the data required to perform time-based maintenance is necessary to derive these. The data may not be included and extra checks must be performed to obtain this data.

  For this reason, in order to shift from time-based maintenance to risk-based maintenance, instead of applying risk-based maintenance to all facilities at once, places, places, ranges, etc. where risk-based maintenance should be applied with priority. It is realistic to sequentially apply risk-based maintenance from the selected equipment after selecting (screening). Therefore, in order to realize the transition from time-based maintenance to risk-based maintenance without excessive burden, the scope of maintenance and improvement of predetermined functions, safety and economy, etc. by risk-based maintenance, It is necessary to screen the range that can be maintained and improved by timebase maintenance.

JP 2005-148955 A Japanese Patent Laid-Open No. 2005-085178 JP 2006-252311 A

Shigemitsu Kihara et al., Risk Assessment Maintenance Introduction to RBI / RBM, JIPM Solution, 2002

  However, conventionally, no consideration has been given to selecting a range or the like to which risk-based maintenance should be applied with priority.

  Therefore, an object of the present invention is to provide a maintenance method selection device, a maintenance method selection method, and a program that can easily screen a range to which risk-based maintenance should be applied.

  In order to solve the above-described problems, the maintenance method selection device according to the present invention includes a risk-based maintenance performed on a plurality of facilities according to the degree of deterioration of the facilities and a time base performed based on the usage time of the facilities. A maintenance method selection device for selecting which maintenance is to be performed. For each of a plurality of facilities, the degradation level data relating to the degree of degradation of the facility and the usage time of the facility at the time when the degradation level data is acquired Acquisition means for acquiring time data, detection means for detecting the relationship between the distribution of deterioration degree data and the distribution of time data among a plurality of facilities, and a plurality of facilities based on the relationship detected by the detection means For determining whether to perform time-based maintenance or risk-based maintenance on It is characterized in further comprising a.

  In the maintenance method selection device, when the detection means arranges time data of a plurality of facilities corresponding to the size of the deterioration degree data, the change tendency of the time data is the same tendency as the change tendency of the deterioration degree data. The ratio of the number of facilities indicating the number of facilities is detected, and the selection means detects either the time-based maintenance or the risk-based maintenance for the plurality of facilities based on the ratio detected by the detection means. You may make it determine with implementing.

  In the maintenance method selecting device, when the detection means arranges the time data of a plurality of facilities corresponding to the descending order of the deterioration degree data, the tendency of the change of the time data is the same as the tendency of the change of the deterioration degree data. The ratio of the plurality of facilities is detected, the selection means compares the ratio detected by the detection means with a threshold value, and based on the comparison result, the plurality of facilities are detected. It may be determined that either time-based maintenance or risk-based maintenance is performed.

  In addition, the maintenance method selection method according to the present invention selects whether to perform risk-based maintenance for a plurality of facilities according to the degree of deterioration of facilities or time-based maintenance according to the usage time of facilities. A maintenance method selection method for obtaining, for each of a plurality of facilities, obtaining deterioration degree data relating to the degree of deterioration of the equipment and time data relating to equipment usage time at the time of obtaining the deterioration degree data; and , A detection step for detecting the relationship between the distribution of the deterioration degree data and the distribution of the time data among the plurality of facilities, and the time base maintenance and the risk base for the plurality of facilities based on the relationship detected by the detection step. A determination step for determining which maintenance is to be performed It is an feature.

  A program according to the present invention causes a computer to function as each means of the maintenance method selection device.

  According to the present invention, the relationship between the distribution of deterioration degree data and the distribution of time data between a plurality of facilities is detected, and based on the relationship detected by the detection means, time base maintenance and By determining which of the risk-based maintenance is to be performed, it is possible to simply screen a range to which the risk-based maintenance should be applied.

FIG. 1 is a diagram schematically showing a configuration of a maintenance system according to an embodiment of the present invention. FIG. 2 is a diagram schematically illustrating a data configuration stored in the facility DB. FIG. 3 is a block diagram illustrating a configuration of the maintenance technique selection device. FIG. 4 is a flowchart showing the operation of the maintenance method selection device. FIG. 5A is a graph relating to deterioration degree data and time data. FIG. 5B is a graph relating to deterioration degree data and time data. FIG. 6A is a diagram for explaining a change point in FIG. 5A. FIG. 6B is a diagram for explaining a change point in FIG. 5B.

  Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, a case where a utility pole is applied as equipment for maintenance will be described as an example.

<Configuration of maintenance system>
As shown in FIG. 1, the maintenance system according to the present embodiment includes a client terminal 1 used by a person in charge of planning maintenance for a large number of utility poles installed in a wide area, and an information server 2 storing various information related to utility poles. And a maintenance method selection device 3 for selecting whether to perform risk-based maintenance or time-based maintenance on the utility pole. Each component of such a maintenance system is connected to the network 4 and transmits / receives various information to / from each other via the network 4.

<< Configuration of client terminal >>
The client terminal 1 includes a known PC (Personal Computer) or the like, and is a terminal device used by a planner who plans maintenance. When such a client terminal 1 detects an operation input related to the predetermined range in order to inquire about a maintenance method to be performed on a utility pole included in the predetermined range, this content (hereinafter referred to as “inquiry information”) is detected. ) Is transmitted to the maintenance method selection device 3, and the response received from the maintenance method selection device 3 is output in response to the inquiry information. Here, the inquiry information includes at least information on the predetermined range. This predetermined range indicates a specific condition for grouping telephone poles, for example, geographical conditions such as a specific area such as a telephone pole installed in XX ward xx town 1st, 2010 1 It includes temporal conditions such as date of manufacture such as utility poles manufactured from December to December 2011.

≪Information server configuration≫
The information server 2 is composed of a known storage device that stores various types of information, and stores various types of information related to the operation of the maintenance system. The various types of information are input by an operation input by a worker who performs installation or maintenance of the utility pole, receiving information via the network 4 or a known storage medium, and the like. Such an information server 2 includes at least an equipment DB 21 and an inspection DB 22.

  The facility DB 21 stores various types of information related to utility poles. In the present embodiment, as shown in FIG. 2, it consists of type data consisting of information for identifying the type of electric pole, identification data consisting of information for identifying each electric pole, and position information where the electric pole is installed. Position data, deterioration degree data including information indicating the degree of deterioration of the power pole, and time data related to the usage time of the power pole at the time when the deterioration degree data is acquired are stored in association with each power pole. Each of these data is data that has been required when performing a conventional time base maintenance, and is data that can be acquired from normal time base maintenance.

Specifically, the type data includes an identification number related to the type of utility pole. Such type data indicates the identification number indicating the type of the utility pole.
The identification data includes an identification number for identifying the utility pole, a manufacturing number, and the like. In addition, the identification data shown in FIG. 2 has shown the identification number which identifies an electric pole.
Further, the position data includes an identification number indicating the area where the utility pole is installed, the coordinates where the utility pole is installed, the address where the utility pole is installed, and the like. The position data in FIG. 2 indicates the identification number of the area where the utility pole is installed.
Further, the deterioration degree data includes information indicating the degree of maintaining a predetermined function, and includes a numerical value indicating a degree of deterioration of the utility pole, a measured value, an index, failure information, and the like. In addition, the deterioration degree data in FIG. 2 has shown the numerical value which shows the deterioration degree of a utility pole. For example, when the utility pole is made of steel, the numerical value is a value obtained by visually confirming the state of the boundary between the utility pole and the ground and evaluating the degree of corrosion of the utility pole from a plurality of stages.
Further, the time data includes an elapsed time since the installation of the utility pole, an elapsed time after the production of the utility pole, etc. at the time when the deterioration degree data is acquired. Note that the time data in FIG. 2 indicates the elapsed time from when the utility pole is installed to when the latest deterioration degree data is determined.
Among these data, the type data, the identification data, and the position data are generated when, for example, each piece of information on the utility pole is first registered in the facility DB 21. Further, the deterioration degree data and the time data are generated when the worker inputs a value obtained by evaluating the deterioration degree into the facility DB 21. In addition, about the time data, the information regarding the use start date and time of the utility pole may be registered in the facility DB 21, and when the deterioration degree data is input, it may be generated based on the input date and the use start date and time. .

  On the other hand, the inspection DB 22 stores various information related to maintenance such as inspection items in time-based maintenance and risk-based maintenance.

≪Configuration of maintenance method selection device≫
The maintenance method selection device 3 inputs information from the outside such as an arithmetic device such as a CPU (Central Processing Unit), a storage device such as a memory and an HDD (Hard Disc Drive), a keyboard, a mouse, a pointing device, a button, and a touch panel. Input device to detect, I / F (Interface) device to send / receive information to / from outside, Device to acquire information from outside such as camera and infrared sensor, LCD (Liquid Crystal Display) and organic EL (Electro Luminescence) The computer is provided with a display device such as a computer and a program installed in the computer. As shown in FIG. 3, the maintenance method selection device 3 is controlled by the above-described program and the hardware resources are controlled by the above-described program. The detection unit 33, the determination unit 34, and the result output unit 35 are realized.

  The data receiving unit 31 is a functional unit that receives inquiry information from the client terminal 1.

  When the data receiving unit 31 receives the inquiry information, the data acquisition unit 32 receives the deterioration degree data and time data of a plurality of utility poles included in the predetermined range based on information on the predetermined range included in the inquiry information. This is a functional unit acquired from the equipment DB 21 of the information server 2. Such a data acquisition unit 31 functions as an acquisition unit, for example.

  The detection unit 33 is a functional unit that detects the relationship between the distribution of deterioration degree data acquired by the data acquisition unit 32 and the distribution of time data. Specifically, when the electric pole time data included in a predetermined range corresponding to the size of the deterioration degree data is arranged, the change tendency of the time data shows the same tendency as the change tendency of the deterioration degree data. The number of utility poles is obtained, and the ratio to the number of utility poles is detected. In the present embodiment, when the time data of the power poles included in the predetermined range corresponding to the descending order of the deterioration degree data are arranged, the change tendency of the time data shows the same downward tendency as the change tendency of the deterioration degree data. Detects the number (change point) of utility poles. Such a detection part 33 functions as a detection means, for example.

  The determination unit 34 determines the time base for the power poles included in the predetermined range based on the relationship between the distribution of deterioration degree data and the distribution of time data between the power poles included in the predetermined range detected by the detection unit 33. It is a functional unit that determines whether to perform maintenance or risk-based maintenance. Specifically, based on the ratio of the number of utility poles that show the same tendency as the change tendency of the deterioration degree data, the change tendency of the time data detected by the detection unit 33 is applied to the utility poles included in the predetermined range. It is determined that either time-based maintenance or risk-based maintenance is performed. In the present embodiment, the determination is performed by comparing the change point detected by the detection unit 33 with a predetermined threshold value. Here, the predetermined threshold value is stored in advance in the memory of the maintenance method selection device 3 by, for example, the planner or the worker. Such a determination unit 34 functions as a determination unit, for example.

  The result output unit 35 is a functional unit that outputs the determination result by the determination unit 34 to the client terminal 1.

<Operation of maintenance method selection device>
Next, the operation of the maintenance method selection device 3 will be described with reference to FIG.

  First, for example, when planning maintenance for a power pole installed in a predetermined area, the planner performs an operation related to the predetermined area in order to determine whether to perform time-based maintenance or risk-based maintenance. Input is made to the client terminal 1. When this operation input is detected, the client terminal 1 transmits inquiry information regarding the operation input to the maintenance method selection device 3. Here, as described above, the inquiry information includes at least information on a predetermined area where maintenance is planned.

  When the inquiry information from the client terminal 1 is received by the data receiving unit 31 of the maintenance technique selecting device 3 (step S1), the data acquisition unit 32 of the maintenance method selecting device 3 is set to the predetermined information specified by the inquiry information. The deterioration degree data and time data of the utility poles installed in the area are acquired from the equipment DB 21 of the server 2 (step S2). Specifically, the data acquisition unit 31 compares information on a predetermined area included in the inquiry information with the position data included in the facility DB 21, and uses the facility DB 21 to store the deterioration degree data and time data of the utility poles that match. Extract from Thereby, the deterioration degree data and time data of each utility pole installed in a predetermined area can be acquired.

  When the deterioration level data and time data of each power pole installed in a predetermined area are acquired, the detection unit 33 arranges the time data in descending order of the corresponding deterioration level data, that is, in descending order of the value of the deterioration level data. (Step S3).

Considering the secular change, the longer the use time, the higher the degree of deterioration. For utility poles exhibiting such a tendency, it is highly possible that the degree of deterioration can be determined from the usage time, so it can be said that the compatibility with time-base maintenance is good. However, the deterioration degree may be low even if the usage time is long, for example, depending on the area where the equipment is installed and the age of manufacture. For utility poles that exhibit this tendency, it is difficult to determine the degree of deterioration based on the usage time alone, and it is thought that some factors that are not influenced by the usage time are strongly influenced. It can be said that the compatibility with is good. As described above, for a range where a certain relationship is strongly observed between the deterioration degree data and the time data, the time base maintenance performed according to the usage time is performed, and the range where the relationship is weak is performed based on the risk evaluation. By applying risk-based maintenance, it is possible to carry out practical maintenance according to the degree of deterioration and the like.
Therefore, in this embodiment, the time data of power poles installed in a predetermined area are arranged in descending order of the corresponding deterioration degree data, and the value of the time data shows a positive correlation with the deterioration degree data. This change is detected by detecting the change point that is the boundary between the range of the power pole showing the downward trend and the negative value of the time data value, that is, the same as the range of the power pole not showing the downward trend. The maintenance method for the utility pole installed in the predetermined area is selected based on the point.

  As an example, FIGS. 5A and 5B show graphs in which time data are arranged in descending order of deterioration degree data. Here, FIG. 5A and FIG. 5B are graphs relating to deterioration degree data and time data of utility poles installed in different regions. In FIGS. 5A and 5B, time data is described as a line graph (reference symbols a and b), and corresponding deterioration degree data is also described as a bar graph. 5A and 5B, the vertical axis indicates the value of time data or deterioration degree data, and the horizontal axis indicates the number of utility poles. Further, in the present embodiment, a so-called moving average value such as an average value of the preceding and following five time data is used as the time data value. As a result, it is possible to generate a curved line graph as shown by reference symbols a and b in FIGS. 5A and 5B.

When the time data is arranged in descending order of the deterioration degree data and graphed, the detection unit 33 detects a change point of the increase / decrease tendency of the time data in the graph (step S4). For example, the line graph of the time data shows a continuous downward trend along with the deterioration degree data in the range where the value of the deterioration degree data is large, as indicated by symbols a ′ and b ′ in FIGS. 6A and 6B. Since then, the downward trend has been lost. Therefore, the detection unit 33 detects change points X1 (x1, y1) and X2 (x2, y2) at which the downward trend changes in the line graphs indicated by symbols a and b. Note that x1 and x2 indicate the number of utility poles that show a downward trend, and y1 and y2 indicate time data values at the value points at which the downward trend ends. Such change point detection can be realized by a known change point detection algorithm.
Here, for utility poles in which the value of the deterioration degree data is within a range larger than the value of the deterioration degree data at the change point, there is a positive correlation between the deterioration degree data and the time data, and the time data is continuous. Therefore, it can be said that the compatibility with the time base maintenance is good. On the other hand, it is difficult to determine the deterioration of power poles based only on the usage time for power poles that have a deterioration level data value that is smaller than the deterioration level data value at the change point. It can be said that the sex is good.

  When the change point is detected, the determination unit 34 compares the change point with a predetermined threshold value (step S5). Specifically, in the case of FIG. 6A, for example, the horizontal axis of the change point X1, that is, the number of utility poles x1 is compared with the threshold value α. Similarly, in the case of FIG. 6B, for example, x1 of the change point X2 is compared with the threshold value α. Here, as the threshold value α, an average value of change points in each region, a value based on the experience of the operator, a value taking into account the deterioration of the utility pole, or a value appropriately combined with these can be used. .

  When the change point is smaller than the threshold value (step S5: YES), the determination unit 34 determines that the risk-based maintenance is applied because the number of utility poles having good compatibility with the risk-based maintenance is large (step S6). .

  On the other hand, when the change point is equal to or greater than the threshold value (step S5: NO), the determination unit 34 determines that the time base maintenance is applied because the number of power poles having good compatibility with the time base maintenance is large (step S8). .

  When the maintenance to be applied is determined, the result output unit 35 transmits the determination result to the client terminal 1 (step S7).

  When the client terminal 1 receives the determination result from the maintenance technique selecting device 3, the client terminal 1 displays the determination result on a display screen or the like. Thereby, the person in charge of planning notifies the maintenance method specified by the determination result to the worker who performs maintenance of the utility pole installed in the predetermined area. As a result, the utility pole installed in the predetermined area is maintained by the maintenance method selected by the maintenance method selection device 3.

  As described above, according to the present embodiment, the detection unit 33 detects the relationship between the distribution of the deterioration degree data and the distribution of the time data between the power poles included in the predetermined range, and the determination unit 34 detects the relationship. By determining whether to perform time-based maintenance or risk-based maintenance on the utility pole included in the predetermined range based on the relationship detected by the unit 33, the range to which the risk-based maintenance should be applied can be simplified. Can be screened.

In addition, the deterioration degree data and the time data are data that can be easily calculated from the data required when the conventional time base maintenance is performed as described above, or the time base maintenance result and the equipment data. For this reason, in the present embodiment, screening can be performed using only data items obtained from the results of normal time-base maintenance and facility data, and it is not necessary to prepare special data for screening.
On the other hand, for example, Patent Document 3 discloses, for example, time-planned maintenance (TBM), condition monitoring maintenance (CBM), posterior maintenance (BDM), online maintenance (ULM), and combinations thereof in the maintenance activities of plant facilities and equipment. Although it is proposed to select an appropriate maintenance method from among the above, new data and judgment for creating detailed data and input data regarding the target equipment are required. Therefore, in Patent Document 3, it is difficult to calculate using only data obtained by normal timebase maintenance.
Thus, this embodiment can realize screening more easily.

  In this embodiment, the case where the maintenance method is selected by comparing the change point and the threshold value has been described as an example. However, the method for selecting the maintenance method is not limited to this, for example, different regions. The change points may be detected and the change points may be compared, and the smaller change point value may be time-based maintenance, and the larger change point value may be risk-based maintenance. Also, select time-based maintenance when the number of utility poles showing the same tendency in time data and deterioration degree data is larger than the quantity of utility poles not showing the same tendency, and select risk-based maintenance when it is smaller. It may be.

  Moreover, in this Embodiment, although the case where the number of utility poles in a change point and a threshold value were compared was demonstrated to the example, it cannot be overemphasized that a ratio may be used instead of a quantity. At this time, as a matter of course, the ratio is also used for the threshold value. Thereby, the maintenance method can be determined regardless of the number of utility poles included in the predetermined range.

  In addition, as the present embodiment, the case where the utility pole is applied as the target equipment to be maintained has been described as an example. However, the target equipment is not limited to the power pole, and various equipment can be used as long as it is an apparatus or equipment that performs maintenance. Needless to say, it can be applied.

  Further, as described above, the maintenance method selection device 3 according to the present embodiment is realized by a computer and a program, and may be provided by recording the program on a recording medium or transmitting the program via a network. it can.

  The present invention can be applied to various systems for selecting whether to perform time-based maintenance or risk-based maintenance.

  DESCRIPTION OF SYMBOLS 1 ... Client terminal, 2 ... Information server, 3 ... Maintenance method selection apparatus, 4 ... Network, 21 ... Equipment DB, 22 ... Inspection DB, 31 ... Data receiving part, 32 ... Data acquisition part, 33 ... Detection part, 34 ... Determination unit, 35 ... result output unit.

Claims (5)

A maintenance method selection device that selects which of the risk-based maintenance performed according to the degree of deterioration of the facility and the time-based maintenance performed according to the usage time of the facility for a plurality of facilities,
For each of the plurality of facilities, acquisition means for acquiring deterioration level data relating to the degree of deterioration of the equipment, and time data relating to the usage time of the equipment at the time of acquiring the deterioration degree data;
Detecting means for detecting a distribution of the time data among the plurality of facilities when the time data of the plurality of facilities corresponding to the order of the magnitude of the deterioration degree data are arranged ;
Determination means for determining whether to perform time-based maintenance or risk-based maintenance on the plurality of facilities based on the distribution of the time data among the plurality of facilities detected by the detection unit. A maintenance method selection device characterized by that. In the distribution of the time data among the plurality of facilities when the time data of the plurality of facilities corresponding to the descending order of the deterioration degree data is arranged , the detection means has a downward trend in the change of the time data Detect change points that no longer show
The determination unit compares the number of facilities having the deterioration degree data corresponding to the change point detected by the detection unit and a predetermined threshold value, and determines the plurality of facilities based on the comparison result. The maintenance method selecting device according to claim 1, wherein it is determined that either the time-based maintenance or the risk-based maintenance is performed. A maintenance method selection method for selecting which of risk-based maintenance to be performed according to the degree of deterioration of the facility and time-based maintenance to be performed according to the usage time of the facility for a plurality of facilities,
  For each of the plurality of facilities, an acquisition step of acquiring deterioration level data regarding the degree of deterioration of the facilities, and time data regarding the usage time of the facilities at the time of acquiring the deterioration level data;
  A detection step of detecting a distribution of the time data among the plurality of facilities when the time data of the plurality of facilities corresponding to the order of the magnitude of the deterioration degree data are arranged;
  A determination step of determining whether to perform time-based maintenance or risk-based maintenance on the plurality of facilities based on the distribution of the time data among the plurality of facilities detected by the detection step;
  A maintenance method selection method characterized by comprising: In the detection step, in the distribution of the time data among the plurality of facilities when the time data of the plurality of facilities corresponding to the descending order of the deterioration degree data is arranged, the change tendency of the time data tends to decrease Detect change points that no longer show
In the determination step, the number of facilities having the deterioration degree data corresponding to the change point detected in the detection step is compared with a predetermined threshold value, and the plurality of facilities are compared based on the comparison result. Determine whether to perform either the time-based maintenance or the risk-based maintenance
The maintenance method selection method according to claim 3, wherein: A program for causing a computer to function as each means of the maintenance technique selection device according to claim 1 or 2 .

Images