JP7285196B2 - WORKING MACHINE PARTS DETERIORATION ESTIMATION SYSTEM AND WORKING MACHINE PARTS DETERIORATION ESTIMATION METHOD - Google Patents

Description

TECHNICAL FIELD The present invention relates to a work machine parts deterioration estimation system and a work machine parts deterioration estimation method, and more particularly to a work machine parts deterioration estimation system and a work machine parts deterioration estimation method for estimating the state of deterioration of parts caused by environmental factors. .

Working machines that operate outdoors, such as construction machines, operate and stand by in various environments both in Japan and overseas. For example, in working machines that operate or stand by in harsh environments such as salt-damaged coastal environments, acid-damaged environments in industrial areas, and high-temperature and high-humidity environments, it is expected that parts will fail early due to environmental deterioration such as corrosion.

Specifically, a working machine may operate while staying at one work site, but in most cases, it operates and stands by while moving to various sites. Since the ambient temperature becomes high due to the internal combustion engine during operation, it is assumed that attachments (for example, dust) from the environment are removed from moving parts such as cylinders. On the other hand, during standby (i.e., non-operating), the ambient temperature may become a dewy environment depending on the season, and it is assumed that deposits from the environment will accumulate and adhere to the moving parts, causing problems due to environmental degradation. . For this reason, there have been cases of premature failure of parts due to environmental degradation including corrosion.

In order to prevent failures due to the effects of such environmental deterioration and to operate the work machine stably for a long period of time, it is conceivable to estimate the deterioration state of parts and appropriately propose the parts replacement timing.

Therefore, it is conceivable to apply the wire deterioration estimation method for estimating wire corrosion without a sensor described in Patent Document 1, for example, to corrosion estimation of parts of working machines. More specifically, in the electric wire deterioration estimation method of Patent Document 1, an accurate chloride adhesion amount is created by creating a salt arrival map based on a simulation of the chloride adhesion amount, which is a corrosion factor, by utilizing open environmental data. , and based on the estimated results, quantify the corrosion deterioration due to salt adhesion of the wire, and evaluate the life of the wire. Therefore, it is conceivable to use such a method to estimate the corrosion of the parts of the working machine, and to replace the parts according to the estimated situation, thereby stably operating the working machine.

Japanese Patent No. 5008733

However, the wire deterioration estimation method described above does not take into consideration working machines such as construction machines that repeatedly operate and stop working. In other words, in the case of work machines, they operate and stand by in various environments both in Japan and overseas, and the surrounding environment changes from place to place. Therefore, it is difficult to apply the wire deterioration estimation method described above to estimation of corrosion of parts of working machines.

The present invention has been made to solve the problems of the prior art, and its purpose is to estimate the state of deterioration of parts caused by environmental factors for a working machine that repeats operation and non-operation. The purpose is to realize stable operation of the work machine by taking measures such as appropriate parts replacement or maintenance.

A work machine part deterioration estimation system according to the present invention is a work machine part deterioration estimation system for estimating the deterioration state of a work machine part, wherein the position of the work machine in the work daily report immediately before the non-operating day of the work machine. an environmental data storage unit that stores environmental data in the environment data storage unit; a deterioration amount calculation unit that calculates the amount of deterioration of parts of the working machine based on the environmental data stored in the environmental data storage unit; and a usable period calculator for calculating the usable period of the part based on the deterioration amount of the part.

In the work machine component deterioration estimation system according to the present invention, the deterioration amount calculation unit calculates the deterioration amount of the work machine component based on the environmental data stored in the environmental data storage unit, and the usable period calculation unit calculates the deterioration amount. The usable period of the part is calculated based on the deterioration amount of the part calculated by the calculation unit. By doing so, it is possible to estimate the state of deterioration of parts based on the environmental data for each location where the work machine is moved. It is possible to estimate the state of deterioration of parts. As a result, appropriate countermeasures such as replacement of parts or maintenance can be taken according to the estimated state of deterioration, so that stable operation of the work machine can be realized.

According to the present invention, for a work machine that repeats operation and non-operation, the state of deterioration of parts caused by environmental factors is estimated, and appropriate measures such as replacement of parts or maintenance are taken, thereby stabilizing the work machine. operation can be realized.

1 is a schematic diagram showing the configuration of a component deterioration estimation system for a work machine according to an embodiment; FIG. It is a block diagram which shows the structure of a management server. FIG. 2 is a flow chart showing a method for estimating deterioration of parts of a work machine according to an embodiment; FIG. 4 is a flowchart showing the details of step S1 in FIG. 3; It is a figure which shows an example of the components deterioration data memorize|stored in the components deterioration data memory|storage part. FIG. 4 is a flowchart showing details of step S2 in FIG. 3; It is a figure which shows an example of the usage period information memorize|stored in the usage period memory|storage part. FIG. 4 is a flowchart showing the details of step S3 in FIG. 3; It is a figure which shows an example of the environmental data memorize|stored in the environmental data storage part. FIG. 4 is a flowchart showing details of step S4 in FIG. 3; FIG. 4 is a flowchart showing the details of step S5 in FIG. 3; It is a figure which shows the relationship between usable period and corrosion amount which is an example of estimated data. It is a front view of the monitor which shows the installation example of an alerting|reporting apparatus. It is a figure which shows the relationship between cumulative failure probability and deterioration amount. FIG. 4 is a diagram showing the relationship between survival rate and usable period; It is a figure which shows the relationship between a survival rate and deterioration amount.

An embodiment of a component deterioration estimation system for a work machine according to the present invention will be described below with reference to the drawings. In the following explanation, in order to avoid complication of the explanation, "system for estimating parts deterioration of working machine" is abbreviated as "system for estimating parts deterioration of working machine" and "method for estimating parts deterioration of working machine" is abbreviated as "method for estimating parts deterioration". There is

FIG. 1 is a schematic diagram showing the configuration of a component deterioration estimation system for a work machine according to an embodiment. The parts deterioration estimation system 1 of the present embodiment estimates the parts deterioration state of a working machine caused by environmental factors during outdoor operation or non-operation, and notifies the estimated results to workers, service personnel, users, and the like. System. As shown in FIG. 1, a parts deterioration estimation system 1 mainly includes a working machine (hydraulic excavator in this case) 2, a communication satellite 3 capable of communicating with the working machine 2, and a base station 4 capable of communicating with the communication satellite 3. , a user terminal 6 , a portable terminal 7 and a management server 10 which are connected via a line network 5 .

The work machine 2 is shipped from the factory of the manufacturer (manufacturer), and is used by a predetermined user (for example, the owner of the work machine or a rental contractor) at a work site where civil engineering work, construction work, demolition work, dredging work, or the like is performed. used for A communication antenna for communicating with a communication satellite 3 is arranged on the working machine 2 . The work machine 2 also includes a machine identification device 11, an operation detection device 12, and a current position acquisition device 13 (see FIG. 2).

The machine identification device 11 identifies the working machine 2 . For example, the machine identification device 11 identifies the work machine 2 based on the model, serial number, etc. of the work machine 2 and extracts machine information (A) corresponding to the work machine 2 . The models are, for example, E01, E02, E03, and so on.

The operation detection device 12 acquires a daily work report that records the operation information of the work machine, and detects the operation information (B) from the daily work report. The operation detection device 12 also determines whether the work machine is in operation or on standby based on the presence or absence of the daily work report.

The current position acquisition device 13 sets a day on which the daily work report acquired by the operation detection device 12 is missing as a non-working day, and acquires the current position information of the work machine 2 in the daily work report immediately before the non-working day. That is, when there is a non-working day, the current position acquisition device 13 acquires the current position information (C) on the map of the work machine in the work daily report immediately before the non-working day. Global Positioning System) or the like can be used. When a GPS is used as the current position acquisition device 13, the current position information on the map can be acquired by arranging the GPS on the work machine 2. FIG.

The work machine 2 communicates the machine information (A) identified by the machine identification device 11, the operation information (B) detected by the operation detection device 12, and the current position information (C) acquired by the current position acquisition device 13. It can be transmitted to management server 10 via satellite 3 , base station 4 and line network 5 .

The management server 10 is a main computer that constitutes the parts deterioration estimation system 1 and is installed in the head office, branch office, factory, or management center of the manufacturer of the work machine 2 . The management server 10 includes a CPU (Central Processing Unit) that executes calculations, a ROM (Read Only Memory) as a secondary storage device that stores programs for calculations, and storage of calculation progress and temporary control variables. It is composed of a microcomputer combined with a RAM (Random Access Memory) as a temporary storage device for storing , and by executing the stored program, the amount of deterioration of parts is calculated, the amount of deterioration of parts is updated, and parts can be used. Calculation of the period, determination of necessity of parts replacement or maintenance, driving of the notification device 19, and the like are performed.

FIG. 2 is a block diagram showing the configuration of the management server. As shown in FIG. 2, the management server 10 mainly includes an internal server storage area 20, a deteriorated component determination unit 21, a usage period calculation unit 22, a deterioration amount calculation unit 23, a deterioration amount update unit 24, and a usable period calculation unit. 25 and a replacement/maintenance determination unit 26 . The intra-server storage area 20 includes a usage period storage section 14 , a component deterioration data storage section 15 , an environment data storage section 16 , an integrated deterioration amount storage section 17 , and an estimated data storage section 18 .

Based on the operation information from the operation detection device 12, the usage period storage unit 14 stores the non-operating days from the operation start date of the work machine to the current time as the usage period of the work machine. The non-operating days are determined based on the days when the daily work report is missing as described above. In addition, the usage period storage unit 14 may store the number of days of operation, the number of calendar days, or the like, in addition to the number of non-operating days. Then, the usage period storage unit 14 outputs, for example, the stored usage period information to the usage period calculation unit 22 as usage period information (D).

The parts deterioration data storage unit 15 stores the deterioration data of the parts related to the work machine identified by the machine identification device 11 in the order of likelihood of part replacement due to environmental deterioration. The parts deterioration data storage unit 15 also stores materials of parts that are likely to cause environmental deterioration. Then, the component deterioration data storage unit 15 outputs, for example, the stored component deterioration data (E) to the deteriorated component determination unit 21 or the deterioration amount calculation unit 23 .

The environmental data storage unit 16 stores the environmental data at the position of the working machine in the daily work report immediately before the non-operating day of the working machine. That is, the environmental data acquisition unit 16 stores environmental data at the current position of the work machine acquired by the current position acquisition device 13 . Environmental data includes ambient air temperature, relative humidity, sulfur dioxide deposition or sulfur dioxide concentration, chloride deposition or distance from shoreline, and the like. Although not shown, the environmental data storage unit 16 also has means for connecting to environmental databases published by the Meteorological Agency, the Ministry of the Environment, etc., and means for converting environmental data obtained from the public databases into values that can be handled by the management server 10. include. Then, the environment data storage unit 16 outputs the stored environment data (F) to the deterioration amount calculation unit 23, for example. In this embodiment, each sensor is installed in the working machine 2 to directly measure the outside air temperature, relative humidity, sulfur dioxide adhesion amount or sulfur dioxide concentration, chloride adhesion amount, and the like. It may be stored in the data storage unit 16 .

The integrated deterioration amount storage unit 17 stores deterioration amount data of parts from the operation start date of the work machine to the present time, for example, an average value or an integrated value of the deterioration amount. The integrated deterioration amount storage unit 17 outputs the deterioration amount data (G) stored, for example, to the deterioration amount updating unit 24 . Further, the accumulated deterioration amount storage unit 17 can update the deterioration amount of the corresponding part based on the exchange history information of the part. For example, when the arm cylinder is replaced, the integrated deterioration amount storage unit 17 is configured to return the deterioration amount regarding the arm cylinder to an initial value (for example, zero).

The estimated data storage unit 18 stores each data used for estimating the deterioration of parts (for example, calculating the usable period of parts). The estimated data includes the relationship between the usable period and the amount of deterioration created in advance based on the past failure data of the part, the relationship between the cumulative failure probability and the amount of deterioration, the relationship between the survival rate and the usable period, or the survival rate. It includes the relationship between the rate and the amount of deterioration. These relationships are stored in the estimated data storage unit 18 in the form of diagrams, formulas or tables. The estimated data storage unit 18 then outputs the stored estimated data (H) to the usable period calculation unit 25 .

Note that the average amount of deterioration is used in the relational expression or table relating to the usable period, and the cumulative amount of deterioration is used in the relational expression or table relating to the cumulative failure probability and survival rate. An example of the relationship between the usable period and the amount of deterioration (here, the amount of corrosion) is shown in FIG. Using the relationship shown in FIG. 12, the usable period can be obtained from the corrosion amount.

On the other hand, an example of the relationship between the cumulative failure probability and the amount of deterioration is shown in FIG. 14, for example. Using the relationship shown in FIG. 14, the cumulative failure probability can be obtained from the amount of deterioration. Furthermore, FIG. 15 shows an example of the relationship between the survival rate and the usable period in which the amount of deterioration is used as a parameter. Using the relationship shown in FIG. 15, the available period can be obtained from the amount of deterioration and the survival rate. Furthermore, an example of the relationship between the survival rate and the amount of deterioration is shown in FIG. 16, for example. Using the relationship shown in FIG. 16, the survival rate can be obtained from the amount of deterioration.

The deteriorated parts determination unit 21 determines the deterioration state of parts based on the parts deterioration data (E) from the parts deterioration data storage unit 15 . The usage period calculator 22 adds up the usage period based on the usage period information (D) from the usage period storage unit 14 .

The deterioration amount calculation unit 23 determines the working machine based on the environmental data (F) stored in the environmental data storage unit 16 (for example, the temperature of the outside air, the relative humidity, the sulfur dioxide adhesion amount or sulfur dioxide concentration, and the chloride adhesion amount). Calculate the amount of deterioration of the parts. The deterioration amount update unit 24 uses the deterioration amount calculated by the deterioration amount calculation unit 23 and the deterioration amount data (G) from the accumulated deterioration amount storage unit 17 (for example, the average value or accumulated value of past deterioration amounts). to update the amount of deterioration. Further, the deterioration amount updating unit 24 causes the accumulated deterioration amount storage unit 17 to store the updated deterioration amount.

The usable period calculation unit 25 calculates the usable period of the component based on the deterioration amount of the component calculated by the deterioration amount calculation unit 23 . More specifically, the usable period calculation unit 25 calculates the estimated data (H) from the estimated data storage unit 18 (for example, the relationship between the usable period and the amount of deterioration, the relationship between the cumulative failure probability and the amount of deterioration, relationship between survival rate and usable period, relationship between survival rate and amount of deterioration), the usable period of the component is calculated from the amount of deterioration calculated by the deterioration amount calculation unit 23 and further updated by the deterioration amount updating unit 24. .

The replacement/maintenance determining unit 26 compares the usable period of the part calculated by the usable period calculating unit 25 with the usable period information (D) from the usable period storage unit 14, and determines whether the part needs to be replaced or maintained. (In other words, whether it is time to replace parts or maintenance) is determined. Then, when it is determined that the parts replacement time or maintenance time has come, the replacement/maintenance determination unit 26 outputs a drive signal to the notification device 19 .

As the notification device 19, a lamp, a buzzer, a display device such as a monitor, or the like can be used. FIG. 13 is a diagram showing an installation example of the notification device 19. As shown in FIG. For example, a lamp 33 indicating that the integrated value of the amount of deterioration has reached a predetermined value when lit is set on the monitor 30 together with the water temperature gauge 31 and the fuel gauge 32 . By looking at the lamp 33, the worker or manager can know that the time for maintenance or parts replacement has not yet been reached when the lamp is turned off, and can know that the time for maintenance or parts replacement has been reached when the lamp is lit. can. As a result, it is possible to prevent the work machine from malfunctioning and shortening its life. Further, when a display device is used as the notification device 19, the maintenance state/time can be displayed on the screen.

Further, the determination result of the replacement/maintenance determining unit 26 is transmitted to the user terminal 6 on the user side and the mobile terminal 7 on the service staff side via the line network 5 to notify the user and the service staff. In this way, the user of the working machine 2 can easily grasp the replacement timing of the parts or the maintenance timing via the user terminal 6 and the service staff via the portable terminal 7, respectively. When parts need to be replaced or maintained, the service personnel can quickly replace the parts or perform maintenance, so that the working machine 2 can be operated stably. Examples of the mobile terminal 7 include a smart phone, a tablet terminal, a mobile phone, and a PDA (Personal Data Assistant).

A method of estimating component deterioration using the component deterioration estimating system 1 will be described below with reference to FIG. FIG. 3 is a flowchart showing a method for estimating deterioration of parts of a working machine. 4, 6, 8, 10, and 11 show the detailed flow of the flow chart shown in FIG.

First, in step S1, the management server 10 takes in machine information (A) and parts deterioration data (E). Specifically, as shown in FIG. 4, the management server 10 acquires the machine information (A) output from the machine identification device 11 (see step S11), and then accesses the parts deterioration data storage unit 15. Then, the previously acquired machine information (A) is collated with the parts deterioration data (E) stored in the parts deterioration data storage unit 15 (see step S12). Next, the management server 10 extracts the part deterioration information corresponding to the machine information (A) (see step S13), and extracts the information of the parts (for example, part 1 and part 2) that have the possibility of environmental deterioration ordered in advance. Take in (see step S14).

FIG. 5 is a diagram showing an example of component deterioration data stored in a component deterioration data storage unit. As shown in FIG. 5, the part deterioration data storage unit 15 stores, for example, E11, E12, etc. as parts that may cause environmental deterioration corresponding to the model E01, and parts that may cause environmental deterioration corresponding to the model E02. E21, E22, etc., are stored as parts E21, E22, etc., which correspond to the model E03, and E31, E32, etc., are stored as parts that may be subject to environmental deterioration corresponding to the model E03. In FIG. 5, the top two types of parts that are likely to deteriorate due to the environment (that is, deterioration level 1 and deterioration level 2) are shown as an example, but there is no limit to the number of parts. In addition, the material is described in the data of parts that may be subject to environmental degradation.

In step S2 following step S1, operation information (B) is taken in and usage period information (D) is calculated. Specifically, as shown in FIG. 6, the management server 10 obtains from the operation detection device 12 the daily work report transmitted on the day the work machine is in operation, thereby obtaining the operation information (B) of the work machine. (see step S21). Next, the management server 10 determines whether there is an operation for that day based on whether there is a daily work report (see step S22).

Next, the usage period calculator 22 calculates usage period information (D). Specifically, as shown in FIG. 7, the usage period calculation unit 22 adds the operating information and the operating hours to the usage period storage unit 14 on days when there is a daily work report, and adds information on non-operation on days when there is no daily work report. and zero running time are added respectively. As a result, data for working days and non-working days are created (see step S23). Furthermore, the period-of-use computing unit 22 calculates the number of calendar days (that is, the entire period), the number of operating days (that is, the operating period), and the number of non-operating days (that is, the non-operating period) from the operation start date of the work machine to the present time. (that is, addition), and the calculated result is stored in the usage period storage unit 14 (see step S24).

In step S3 following step S2, current position information (C) and environment data (F) are captured. Specifically, as shown in FIG. 8, the current position acquisition device 13 sets a day on which the daily work report acquired from the operation detection device 12 is absent as a non-working day, and determines the number of working machines listed in the daily work report immediately before the non-working day. , the current position information (C) of the work machine on the map is obtained and output to the management server 10 . The management server 10 takes in the output current location information (C) (see step S31).

Next, the management server 10 accesses the environmental data storage unit 16 and compares the previously captured current position information (C) with the environmental data (F) stored in the environmental data storage unit 16 (step S32), and the environmental data (F) corresponding to the current position information (C) is taken in (step S33). As a result, the temperature data, relative humidity data, sulfur oxide adhesion amount data, and chloride adhesion amount data included in the environment data (F) are fetched (see step S34). It should be noted that steps S32 to S34 correspond to the "environmental data capturing step" described in the claims.

FIG. 9 is a diagram showing an example of environmental data stored in the environmental data storage unit. As shown in FIG. 9, the environmental data storage unit 16 stores temperature data F11, F12, F13, . . . , relative humidity data F21, F22, F23, . Sulfur oxide adhesion amount data F31, F32, F33, . . . and chloride adhesion amount data F41, F42, F43, . Note that these data may be stored as a plurality of data such as an hourly average value, daily average value, and monthly average value.

In step S4 following step S3, the deterioration amount calculator 23 calculates the deterioration amount. This step S4 corresponds to the "degradation amount calculation step" described in the claims. Specifically, as shown in FIG. 10, the deterioration amount calculation unit 23 first reads out the temperature data, the relative humidity data, the sulfur oxide adhesion amount data, and the chloride adhesion amount data acquired in the above step (step S41). reference). Next, the deterioration amount calculation unit 23 calculates the deterioration amount of the metal material (here, the corrosion amount of carbon steel), which is the main structural material of the moving parts of the working machine, by calculating the temperature data, the relative humidity data, and the amount of sulfur oxide adhesion. data and chloride adhesion amount data (see step S42).

The corrosion amount of carbon steel can be obtained, for example, from a function f1 (T, RH, Pd, Sd) of temperature data T, relative humidity data RH, sulfur dioxide adhesion amount data Pd, and chloride adhesion amount data Sd. The function f1 is defined by the ISO9223 standard, for example. Using this function f1, the corrosion rate of carbon steel in an outdoor environment can be calculated from the temperature, relative humidity, amount of sulfur oxides, and amount of chlorides.

Specifically, the amount of corrosion (also referred to as thickness reduction amount or degree of corrosion) r _corr (μm/year) of carbon steel after exposure for the first year is obtained by the following formula (1).
r _corr =1.77·Pd ^0.52 exp(0.020·RH+f _St )+0.102·Sd ^0.62 exp(0.033·RH+0.040·T) Equation (1)

In formula (1), T is the annual average temperature (° C.), RH is the annual average relative humidity (%), Pd is the annual average sulfur oxide adhesion amount (mg/m ² /day), and Sd is the annual average chloride adhesion. Amount (mg/m ² /day), f _St is a coefficient of 0.150·(T-10) when temperature T≦10°C, and −0.054·(T-10) when temperature T>10°C is. Although corrosion of carbon steel is used as an index here, it is also effective to use metals such as zinc, copper, stainless steel, and aluminum as indices.

In step S5 following step S4, the deterioration amount is updated and the usable period is calculated. Specifically, as shown in FIG. 11, the deterioration amount updating unit 24 reads the carbon steel corrosion amount r _corr ' calculated in the above step (see step S51), and further outputs from the accumulated deterioration amount storage unit 17 The deterioration amount data (G) (that is, the carbon steel corrosion amount r _corr accumulated so far) is taken in (see step S52), and the read corrosion amount r _{corr ′} is added to the taken in corrosion amount r corr to The amount is updated (see step S53).

Next, the usable period calculation unit 25 acquires the estimated data (H) from the estimated data storage unit 18 (see step S54), and based on the acquired estimated data (H), the corrosion amount r _corr updated in the above step The usable period T _limit of the part is calculated (see step S55). As described above, parts are more likely to deteriorate due to environmental factors when the _work machine is not in operation than when it is in operation.

FIG. 12 is a diagram showing a relationship between usable period (that is, non-operating period) and corrosion amount, which is an example of estimated data. For the relationship between the usable period and the corrosion amount shown in FIG. 12, for example, an approximation formula of the non-operating period until failure in the actual environment and the corrosion amount data calculated by this method is adopted. Then, the usable period calculation unit 25 uses the relationship between the usable period and the corrosion amount shown in FIG. 12 to obtain the usable period T _limit from the updated corrosion amount r _corr . In addition to the diagram shown in FIG. 12, a formula or a table (map) may be used for the relationship between the usable period and the amount of deterioration.

As the estimated data (H), survival time analysis or the like may be used in addition to the relationship between the usable period and the amount of deterioration described above. That is, for example, the relationship between the cumulative failure probability and the amount of deterioration shown in FIG. 14, the relationship between the survival rate and the usable period with the amount of deterioration shown in FIG. Relations may be used. By using such various relationships, it is possible to calculate the usable period of the component from various viewpoints, and to improve the calculation accuracy.

It should be noted that step S5 corresponds to the "usable period calculation step" described in the claims.

In step S6 following step S5, the management server 10 retrieves the usage period information (D). A non-operating period T _nop is adopted as the usage period information (D). That is, in this embodiment, various replacement parts that make up the working machine are analyzed, and it is found that the longer the waiting period of the working machine, the faster the part failure (part replacement) cycle due to environmental deterioration. Considering this, the non-operating period T _nop was adopted as the usage period information (D). Accordingly, in step S6, the management server 10 takes in the non-operating period T _nop as the usage period information (D) output from the usage period storage unit 14. FIG. The non-operating period includes not only days when the work machine does not operate at all, but even if the work machine is operated for less than 1 hour on the day, it is considered as a non-operating situation and is counted as a non-operating day. good too.

In step S7 subsequent to step S6, the replacement/maintenance determining unit 26 compares the non-operating period T _nop with the usable period T _limit obtained in step S5, and determines whether the non-operating period T _nop reaches the usable period T _limit . Determine whether or not Then, when it is determined that the non-operating period has reached the operable period (that is, T _nop ≧T _limit ), the replacement/maintenance determining unit 26 outputs a drive signal to the notification device 19 (see step S8), It prompts the employee or manager to pay attention to replace parts or carry out maintenance, etc. On the other hand, if it is determined that the non-operating period has not reached the usable period (that is, T _nop <T _limit ), the process returns to step S1 and the above steps are repeated. Note that step S7 here corresponds to the "determining step" described in the claims.

In the parts deterioration estimation system 1 configured as described above, the deterioration amount calculation unit 23 calculates the deterioration amount of the parts of the work machine 2 based on the environmental data stored in the environmental data storage unit 16, and calculates the usable period. The part 25 calculates the usable period of the part based on the deterioration amount of the part calculated by the deterioration amount calculation part 23 . In this way, it is possible to estimate the state of deterioration of the parts based on the environmental data for each movement location of the work machine 2. It is possible to estimate the deterioration status of the parts that have been installed. As a result, appropriate countermeasures such as replacement of parts or maintenance can be taken according to the estimated deterioration state, so stable operation of the work machine 2 can be realized.

Further, the replacement/maintenance determining unit 26 compares the usable period calculated by the usable period calculating unit 25 with the usable period stored in the usable period storage unit 14, and determines whether or not the parts need to be replaced or maintained. Since the judgment is made, it becomes possible to implement countermeasures such as part replacement or maintenance in a timely manner, and it becomes easier to realize stable operation of the work machine 2 .

On the other hand, in the parts deterioration estimation method according to the present embodiment, the environmental data at the position of the work machine 2 in the daily work report immediately before the non-operating day of the work machine 2 is read, and the parts of the work machine 2 are replaced based on the read environment data. Since the deterioration amount is calculated and the usable period of the part is calculated based on the calculated deterioration amount of the part, it is possible to estimate the deterioration state of the part based on the environmental data for each movement place of the work machine 2. Therefore, it is possible to estimate the state of deterioration of parts caused by environmental factors for the work machine 2 that repeats operation and non-operation. As a result, appropriate countermeasures such as replacement of parts or maintenance can be taken according to the estimated deterioration state, so stable operation of the working machine 2 can be realized.

In the above-described embodiment, the non-operating period T _nop adopted as the usage period information (D) is determined based only on the non-operating days of the work machine, but it is considered that the deterioration of parts progresses even during the operating period. In this case, the sum of the non-operating period of the work machine and the value obtained by multiplying the operating period by a weighting factor (a value between 0 and 1, for example, 0.2), that is, "non-operating period + weighting factor x operating period" A relational expression may be used as the corrected non-operating period T _nop '. In this way, it is possible to improve the accuracy of determining whether or not replacement of parts or maintenance is necessary.

Further, in the above-described embodiment, the amount of corrosion of carbon steel, which is the main structural material of the working machine, is used in executing step S4 shown in FIG. Main parts of working machines are made of carbon steel, but other materials such as stainless steel are also used. In stainless steel, chlorides are more susceptible to corrosion than sulfur dioxide, and chloride-induced corrosion (pitting and crevice corrosion) is thought to be prominent. The parts materials are described in the parts deterioration data stored in the parts deterioration data storage unit 15 shown in FIG. Therefore, when the parts are made of stainless steel, the corrosion amount calculation formula is a function f1 (T, RH, Sd). This makes it possible to accurately calculate the deterioration amount of the stainless steel component.

Furthermore, there are cases where parts of working machines are made of resin materials, etc., in addition to metal materials. The present invention can also be applied to parts made of resin material.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the invention described in the claims. Changes can be made.

1 Parts deterioration estimation system for working machine 2 Working machine 3 Communication satellite 4 Base station 5 Network 5
6 User terminal 7 Mobile terminal 10 Management server 11 Machine identification device 12 Operation detection device 13 Current position acquisition device 14 Use period storage unit 15 Parts deterioration data storage unit 16 Environmental data storage unit 17 Integrated deterioration amount storage unit 18 Estimated data storage unit 19 Notification device 20 Storage area 21 in server Deteriorated part determination unit 22 Usage period calculation unit 23 Deterioration amount calculation unit 24 Deterioration amount update unit 25 Usable period calculation unit 26 Replacement maintenance determination unit

Claims (10)

A work machine part deterioration estimation system for estimating a deterioration state of a work machine part,
an environmental data storage unit that stores environmental data at the position of the work machine in the daily work report immediately before the non-operating day of the work machine;
a deterioration amount calculation unit that calculates an amount of deterioration of a part of the work machine based on the environmental data stored in the environmental data storage unit;
a usable period calculation unit that calculates a usable period of the component based on the deterioration amount of the component calculated by the deterioration amount calculation unit;
A parts deterioration estimation system for a working machine, comprising: The usable period calculation unit calculates the relationship between the usable period and the amount of deterioration created in advance based on the past failure data of the part, the relationship between the cumulative failure probability and the amount of deterioration, and the relationship between the survival rate and the usable period. or the relationship between the survival rate and the amount of deterioration, and the usable period of the part is calculated from the amount of deterioration of the part calculated by the deterioration amount calculation unit. estimation system. a period-of-use storage unit that stores period-of-use information of parts;
A determination unit that compares the usable period calculated by the usable period calculation unit with the usable period stored in the usable period storage unit and determines whether or not replacement of parts or maintenance is necessary. 3. The work machine part deterioration estimation system according to 1 or 2. 4. The system for estimating component deterioration of a working machine according to claim 3, wherein at least a non-operating period of the working machine is used as the usage period stored in the usage period storage unit. 5. Estimation of parts deterioration of a working machine according to claim 4, wherein the usage period stored in the usage period storage unit is the sum of the non-operating period of the working machine and the value obtained by multiplying the operating period of the working machine by a weighting factor. system. A work machine part deterioration estimation method for estimating a deterioration state of a work machine part, comprising:
an environmental data capturing step of capturing environmental data at the position of the work machine in the work daily report immediately before the non-operating day of the work machine;
a degradation amount calculation step of calculating a degradation amount of a part of the working machine based on the environmental data acquired in the environmental data acquisition step;
a usable period calculation step of calculating a usable period of the part based on the deterioration amount of the part calculated in the deterioration amount calculation step;
A method for estimating part deterioration of a working machine, comprising: In the usable period calculation step, the relationship between the usable period and the amount of deterioration created in advance based on the past failure data of the part, the relationship between the cumulative failure probability and the amount of deterioration, the relationship between the survival rate and the usable period 7. The method of estimating deterioration of a part for a working machine according to claim 6, wherein the usable period of the part is calculated from the deterioration amount of the part calculated in the deterioration amount calculation step, using either the survival rate or the relationship between the deterioration amount and the survival rate. . 8. The working machine according to claim 6, further comprising a determining step of comparing the usable period calculated in the usable period calculating step with the usable period of the working machine to determine whether parts need to be replaced or maintained. Parts deterioration estimation method. 9. The method of estimating component deterioration of a working machine according to claim 8, wherein at least a non-operating period of the working machine is used as the period of use of the working machine. 10. The method of estimating component deterioration of a working machine according to claim 9, wherein the usage period of the working machine is the sum of the non-operating period of the working machine and the value obtained by multiplying the operating period of the working machine by a weighting factor.

Images