Work machine, computer-readable storage medium, and method of managing an accessory device

Abstract

A work machine capable of managing accurate cumulative work information of an attachment is provided. An information processing section (71) generates cumulative work information (D1) of an attachment installed to a work device (3) by managing a work condition of the attachment. A parent machine (51) transmits the cumulative work information (D1) generated by the information processing section (71) to a child machine (61). The child machine (61) stores the cumulative work information (D1) received from the parent machine (51) to a storage section (614) provided in the child machine (61).

Description

TECHNICAL FIELD

[0001] The present application relates to a work machine such as a construction machine, a computer-readable storage medium, and a management method of an attachment, and particularly to a work machine, a computer-readable storage medium, and a management method of an attachment in which attachment information is transmitted from a communication device provided on an attachment that can be exchanged to a communication device provided on a main body of a work machine. BACKGROUND

[0002] Japanese Patent Application Publication No. 2017-201119 discloses an attachment monitoring system that can monitor the working conditions of each attachment. In this system, a measurement unit is provided on a work arm, a terminal device is provided on a work machine, and a server device is provided outside the work machine. The measurement unit measures vibrations and hydraulic pressure when the attachment is driven and transmits the measurement results and individual identification information of the attachment to the terminal device. The terminal device transmits the measurement results and individual identification information received from the measurement unit to the server device via a mobile phone line network. The server device analyzes the measurement results received from the terminal device and stores working information of each attachment including the analysis results in a database. The working information of each attachment stored in the database can be browsed by various terminals connected to the same data network as the database.

[0003] Work machines are sometimes used at various construction sites by rental or the like, and sometimes exported to foreign construction sites. The same is true for individual attachments, and the same attachment can be used in various environments with different communication conditions and the like.

[0004] According to the attachment monitoring system disclosed in Japanese Patent Application Publication No. 2017-201119, when a work machine is used in an environment in which communication cannot be established between the terminal device and the server device, such as at a construction site outside the communication range of the mobile phone line network to which the terminal device of the work machine can be connected or at a construction site within the communication range of the mobile phone line network but with poor communication conditions, the server device cannot store the working information of each attachment in the database during this period. Therefore, there is a blank period in which information is not stored in this case, and the accuracy of the working information stored in the database is low. SUMMARY

[0005] An object of the present application is to provide a work machine, a computer-readable storage medium, and a management method of an attachment that can manage accurate cumulative working information of an attachment.

[0006] The work machine of one embodiment of the present application includes a main body, a work device mounted to the main body, an exchangeable attachment mounted to the work device, a first communication device provided to the attachment and having a storage portion, a second communication device provided to the main body and capable of communicating with the first communication device, and an information processing portion provided to the main body, which generates cumulative work information of the attachment by managing a work condition of the attachment mounted to the work device, wherein the second communication device transmits the cumulative work information generated by the information processing portion to the first communication device, and the first communication device stores the cumulative work information received from the second communication device to the storage portion. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 FIG. 1 is a schematic view showing the structure of a work machine according to an embodiment of the present application.

[0008] Figure 2 FIG. 2 is a simplified block diagram showing the overall structure of a control system of the work machine according to the embodiment of the present application.

[0009] Figure 3 FIG. 3 is a block diagram showing the structure of a slave machine.

[0010] Figure 4 FIG. 4 is a block diagram showing the structure of a master machine.

[0011] Figure 5 FIG. 5 is a block diagram showing the structure of a communication module.

[0012] Figure 6 FIG. 6 is a block diagram showing the structure of a server device.

[0013] Figure 7 FIG. 7 is a diagram showing the functions implemented by an information processing device.

[0014] Figure 8 FIG. 8 is a diagram showing the functions possessed by a security module.

[0015] Figure 9 FIG. 9 is a flowchart showing the flow of actions of the slave machine.

[0016] Figure 10 FIG. 10 is a flowchart showing the flow of actions of the master machine, the controller, and the communication module.

[0017] Figure 11 FIG. 11 is a flowchart showing the flow of actions of the server device.

[0018] Figure 12 FIG. 12 is a diagram showing an example of cumulative work information.

[0019] Figure 13is a diagram indicating an example of health status information. DETAILED DESCRIPTION

[0020] Hereinafter, embodiments of the present application will be described in detail with reference to the drawings. In addition, elements denoted by the same reference numerals in different drawings are the same or corresponding elements.

[0021] Figure 1 is a schematic view indicating the structure of a working machine 1 to which the embodiment of the present application is applied. In the example of the present embodiment, the working machine 1 is a construction machine in which a crusher (for example, a cutting machine 33) capable of performing a gripping action by opening and closing of a claw portion is installed as an exchangeable attachment. However, it is not limited to the cutting machine, and other attachments such as a shovel or a breaking hammer can be installed. In addition, it is not limited to the construction machine, and can be other working machines such as an agricultural machine or an industrial machine in which an arbitrary attachment that is exchangeable and whose posture is variable is installed.

[0022] As shown in Figure 1 , the working machine 1 includes a crawler-type lower traveling body 21, an upper swing body 22 disposed on the lower traveling body 21 and capable of swinging, and a working device 3 installed to the upper swing body 22. The lower traveling body 21 and the upper swing body 22 constitute a main body 2 of the working machine 1.

[0023] The working device 3 includes a boom 31 that is installed to the upper swing body 22 so as to be able to swing, a stick 32 that is installed to a distal end of the boom 31 so as to be able to swing, and the cutting machine 33 that is installed to a distal end of the stick 32 so as to be able to swing. The upper swing body 22 and the boom 31 are connected by a boom bottom pin 81 that is a pivot. The boom 31 and the stick 32 are connected by a stick bottom pin 82 that is a pivot. The stick 32 and the cutting machine 33 are connected by a stick top pin 83 that is a pivot. The stick top pin 83 can be detached when the attachment is exchanged. In addition, although not shown in the drawing, the working device 3 includes an actuator such as a boom cylinder that causes the boom 31 to swing with respect to the upper swing body 22, a stick cylinder that causes the stick 32 to swing with respect to the boom 31, and an attachment working cylinder that causes the cutting machine 33 to swing with respect to the stick 32. As a drive unit for driving the boom 31, the stick 32, and the cutting machine 33, other actuators such as hydraulic motors can be used instead of the working cylinders.

[0024] The inside of the upper swing body 22 is configured with a controller 7 that controls the entire work machine 1. By hydraulic control of the controller 7 in conjunction with lever operation by an operator of the work machine 1, the angle of the boom 31 with respect to the upper swing body 22 (boom angle), the angle of the stick 32 with respect to the boom 31 (stick angle), and the angle of the cutting machine 33 with respect to the stick 32 (attachment angle) are each changed. In the present embodiment, a case is described in which the work implement 3 has three drive elements (boom, stick, and attachment), but the present embodiment is not limited to this case. The work implement 3 can have at least one drive element.

[0025] The work machine 1 has a child machine 61 as a first communication device and a parent machine 51 that constitutes a communication device 5 as a second communication device. The child machine 61 and the parent machine 51 can wirelessly communicate with each other by any communication method such as Wi-Fi, Bluetooth (registered trademark), or LPWA (Low Power Wide Area). The child machine 61 is disposed at a prescribed position of the cutting machine 33, and the parent machine 51 is disposed at the upper swing body 22. When there are a plurality of attachments, each of the plurality of attachments is provided with a child machine 61. In order to ensure good communication conditions with the child machine 61, the parent machine 51 is disposed at the front surface of the upper swing body 22 (the surface on the side opposite the cutting machine 33). The parent machine 51 and the controller 7 can communicate with each other by wire or wirelessly by any communication method such as CAN (Controller Area Network).

[0026] Figure 2 is a simplified block diagram that shows the overall structure of a control system 100 of a work machine according to the embodiment of the present application. The control system 100 includes a work machine 1 and a server device 9. The work machine 1 has a child machine 61, a communication device 5, a controller 7, a display device 4, and an actuator drive circuit 78. The communication device 5 includes a parent machine 51 and a communication module 52. The controller 7 includes an information processing section 71. The actuator drive circuit 78 includes a hydraulic pump driven by an engine as a power source, a control valve for adjusting the supply amount of working oil supplied from the hydraulic pump to each actuator, and an operation lever for generating a pilot pressure for controlling the control valve. When an operator of the work machine 1 operates the operation lever, the control valve is controlled by the pilot pressure that varies in accordance with the amount of operation, working oil of an injection amount corresponding to the pilot pressure is supplied to the actuator, and the actuator operates in accordance with the hydraulic pressure of the working oil. Thus, by lever operation by the operator, the work implement 3 performs a desired operation.

[0027] Figure 3 is a block diagram that shows the structure of the child machine 61. As Figure 3As shown in the connection relationship in FIG. 6, the child machine 61 includes a counter 612, a signal processing section 613, a storage section 614, a security module 615, a transmitter 616, and a receiver 617. The signal processing section 613 is configured by a dedicated circuit such as an FPGA.

[0028] The storage section 614 is configured by a rewritable nonvolatile memory such as a flash memory. The storage section 614 stores therein intrinsic identification information SO of the subsidiary equipment to which the child machine 61 is attached and other control information S1. The intrinsic identification information SO includes, for example, a serial number. The control information S1 includes, for example, class information of the subsidiary equipment, size information (information of an outer dimension and a center of gravity, etc.), weight information, manufacturer information, user information, upper limit operation time information, recommended operation area information, and control parameters. The control parameters include, for example, pressure information (allowable upper limit values of a relief pressure and a cylinder pressure, etc.) of operating oil supplied to the subsidiary equipment, and flow information (pump flow and pilot pressure, etc.) of the operating oil supplied to the subsidiary equipment.

[0029] The counter 612 counts the number of clocks of a prescribed operation clock.

[0030] The signal processing section 613 generates subsidiary equipment information S2 including the intrinsic identification information SO and the control information S1 read from the storage section 614. The signal processing section 613 transmits the generated subsidiary equipment information S2 to the transmitter 616 via the security module 615. The function of the security module 615 will be described later. The signal processing section 613 repeatedly performs the generation processing and the transmission processing of the subsidiary equipment information S2 at a prescribed transmission time interval prescribed by the counter 612. The transmission time interval is set to an arbitrary value in the range of, for example, several seconds to several minutes. It is also possible to mount a GPS receiver on the child machine 61, include the position information of the child machine 61 in the subsidiary equipment information S2, and transmit the same to the server device 9, thereby effectively applying to inventory management of the subsidiary equipment.

[0031] The transmitter 616 modulates the subsidiary equipment information S2 input from the signal processing section 613 via the security module 615, and transmits the same as wireless signal subsidiary equipment information S2.

[0032] The receiver 617 receives the cumulative operation information D1 and the health state information D2 of the wireless signal transmitted from the transmitter 512 of the parent machine 51, and demodulates the received cumulative operation information D1 and the health state information D2. The cumulative operation information D1 and the health state information D2 are input from the receiver 617 to the signal processing section 613 via the security module 615. The signal processing section 613 stores the input cumulative operation information D1 and the health state information D2 in the storage section 614. Details of the operation of the child machine 61 will be described later.

[0033] Figure 4 is a block diagram showing the structure of the master 51. As shown in the connection relationship in Figure 4 the master 51 includes a receiver 511, a transmitter 512, a security module 513, a signal processing section 514, and a storage section 515. The signal processing section 514 is constituted by a dedicated circuit such as an FPGA. The storage section 515 is constituted by a rewritable nonvolatile memory such as a flash memory.

[0034] The receiver 511 receives the accessory device information S2 of the wireless signal transmitted from the transmitter 616 of the slave 61, and demodulates the received accessory device information S2. The accessory device information S2 is input from the receiver 511 to the signal processing section 514 via the security module 513. The function of the security module 513 will be described later. The signal processing section 514 performs error detection processing and error correction processing based on an arbitrary algorithm on the input accessory device information S2. The signal processing section 514 inputs the accessory device information S2 to the communication module 52. The signal processing section 514 also inputs the control information SI included in the accessory device information S2 to the controller 7. The controller 7 inputs the cumulative work information Dl generated by the information processing section 71 of the controller 7 to the signal processing section 514. The health state information D2 is also input from the communication module 52 to the signal processing section 514. The signal processing section 514 inputs the input cumulative work information Dl and health state information D2 to the transmitter 512 via the security module 513. The transmitter 512 modulates the input cumulative work information Dl and health state information D2, and transmits them as the cumulative work information Dl and health state information D2 of the wireless signal. Details of the operation of the master 51 will be described later.

[0035] Figure 5 is a block diagram showing the structure of the communication module 52. As shown in the connection relationship in Figure 5 the communication module 52 includes a security module 521, a storage section 522, a transmitter 523, and a receiver 524. The storage section 522 is constituted by a rewritable nonvolatile memory such as a flash memory.

[0036] The accessory device information S2 output from the information processing section 514 of the master 51 is input to the transmitter 523 via the security module 521. The function of the security module 521 will be described later. The cumulative work information Dl generated by the information processing section 71 of the controller 7 is input from the controller 7 to the transmitter 523 via the security module 521. The transmitter 523 transmits the accessory device information S2 and the cumulative work information Dl to the server device 9 via an arbitrary wireless communication network. The receiver 524 receives the health state information D2 from the server device 9. The health state information D2 is input from the receiver 524 to the controller 7 and the signal processing section 514 of the master 51 via the security module 521. Details of the operation of the communication module 52 will be described later.

[0037] Figure 6 is a block diagram showing the structure of the server device 9. As shown in Figure 6 the connection relationship, the server device 9 includes a receiver 91, a transmitter 92, a security module 93, an information processing device 94, a storage section 95, and a display device 96. The storage section 95 is constituted by a rewritable nonvolatile memory such as a flash memory. The information processing device 94 has a CPU 101, a memory 102 such as a ROM and a RAM. The memory 102 stores a program 110 therein.

[0038] The receiver 91 receives the accessory device information S2 and the cumulative work information Dl transmitted from the transmitter 523 of the communication module 52. The receiver 91 inputs the received accessory device information S2 and the cumulative work information Dl to the information processing device 94 via the security module 93. The function of the security module 93 will be described later.

[0039] Figure 7 is a diagram showing the function realized by the information processing device 94 by execution of the program 110 read from the memory 102 by the CPU 101. As shown in Figure 7 , the information processing device 94 functions as an analysis section 201, an acquisition section 202, a determination section 203, and a generation section 204. In other words, the program 110 is a program that causes the information processing device 94 mounted on the server device 9 to function as the analysis section 201, the acquisition section 202, the determination section 203, and the generation section 204. Details of the operation of the server device 9 will be described later.

[0040] Figure 8 is a diagram showing the function possessed by the security module 615, 513, 521, 93. The security module 615, 513, 521, 93 has an authentication processing section 301, an encryption and decryption processing section 302, and a tamper confirmation processing section 303. By having the authentication processing section 301, it is possible to prevent external unauthorized access. By having the encryption and decryption processing section 302, it is possible to prevent leakage of confidential data. By having the tamper confirmation processing section 303, it is possible to detect tampering in the case where the transceiving data is tampered with.

[0041] The security module 615 of the child device 61 and the security module 513 of the parent device 51 perform secure communication between the child device 61 and the parent device 51. The storage section 614 of the child device 61 and the storage section 515 of the parent device 51 (preferably, a region having tamper resistance) store prescribed key information common to the child device 61 and the parent device 51. The authentication processing section 301 of the security module 615 of the child device 61 performs authentication processing for authenticating the legitimacy of the parent device 51 according to an arbitrary authentication algorithm (SHA, etc.) using the key information stored in the storage section 614. The authentication processing section 301 of the security module 513 of the parent device 51 performs authentication processing for authenticating the legitimacy of the child device 61 according to an arbitrary authentication algorithm using the key information stored in the storage section 515. The encryption / decryption processing section 302 of the security module 615 of the child device 61 performs encryption processing on data to be transmitted to the parent device 51 and decryption processing on data received from the parent device 51 according to an arbitrary encryption algorithm (DES, etc.) using the key information stored in the storage section 614. The encryption / decryption processing section 302 of the security module 513 of the parent device 51 performs encryption processing on data to be transmitted to the child device 61 and decryption processing on data received from the child device 61 according to an arbitrary encryption algorithm using the key information stored in the storage section 515. The tamper confirmation processing section 303 of the security module 615 of the child device 61 performs tamper confirmation processing on data received from the parent device 51 according to an arbitrary tamper confirmation algorithm (MAC, etc.) using the key information stored in the storage section 614. The tamper confirmation processing section 303 of the security module 513 of the parent device 51 performs tamper confirmation processing on data received from the child device 61 according to an arbitrary tamper confirmation algorithm using the key information stored in the storage section 515. In the following description, the description of the secure communication between the child device 61 and the parent device 51 is omitted.

[0042] The security module 521 of the communication module 52 implements secure communication between the communication module 52 and the server device 9 in cooperation with the security module 93 of the server device 9. The storage section 522 of the communication module 52 and the storage section 95 of the server device 9 (preferably, a region having tamper-proof characteristics) store prescribed key information common to the communication module 52 and the server device 9. The authentication processing section 301 of the security module 521 of the communication module 52 performs authentication processing for authenticating the legitimacy of the server device 9 in accordance with an arbitrary authentication algorithm (SHA, etc.) using the key information stored in the storage section 522. The authentication processing section 301 of the security module 93 of the server device 9 performs authentication processing for authenticating the legitimacy of the communication module 52 in accordance with an arbitrary authentication algorithm using the key information stored in the storage section 95. The encryption / decryption processing section 302 of the security module 521 of the communication module 52 performs encryption processing on data to be transmitted to the server device 9 and decryption processing on data received from the server device 9 in accordance with an arbitrary encryption algorithm (DES, etc.) using the key information stored in the storage section 522. The encryption / decryption processing section 302 of the security module 93 of the server device 9 performs encryption processing on data to be transmitted to the communication module 52 and decryption processing on data received from the communication module 52 in accordance with an arbitrary encryption algorithm using the key information stored in the storage section 95. The tamper-confirmation processing section 303 of the security module 521 of the communication module 52 performs tamper-confirmation processing on data received from the server device 9 in accordance with an arbitrary tamper-confirmation algorithm (MAC, etc.) using the key information stored in the storage section 522. The tamper-confirmation processing section 303 of the security module 93 of the server device 9 performs tamper-confirmation processing on data received from the communication module 52 in accordance with an arbitrary tamper-confirmation algorithm using the key information stored in the storage section 95. In the following description, the description of the secure communication between the communication module 52 and the server device 9 is omitted.

[0043] Figure 9 is a flowchart showing the flow of operation of the submachine 61. The driving power source of the submachine 61 is supplied by a button cell or the like built in the submachine 61. When the supply of the power source to the submachine 61 is started, first, in step SP21, the counter 612 clears the count value thereof.

[0044] Next, in step SP22, the counter 612 counts the number of clocks of the prescribed operation clock and accumulates the count value.

[0045] Then, in step SP23, the signal processing section 613 determines whether or not the count value of the counter 612 has reached a prescribed set value (corresponding to the above-described transmission time interval).

[0046] In a case where the count value does not reach the set value (step SP23: No), the actions of steps SP22 and SP23 are repeated.

[0047] In a case where the count value reaches the set value (step SP23: Yes), then in step SP24, the signal processing section 613 generates the accessory device information S2 based on the intrinsic identification information SO and the control information SI, and inputs the generated accessory device information S2 to the transmitter 616. Thereby, the accessory device information S2 of the wireless signal is transmitted from the transmitter 616.

[0048] Then, in step SP25, the signal processing section 613 determines whether or not the cumulative work information Dl and the health state information D2 are received from the parent machine 51.

[0049] In a case where the cumulative work information Dl and the health state information D2 are not received (step SP25: No), the signal processing section 613 executes the process of step SP27 described later.

[0050] Figure 10 is a flowchart showing the action flow of the parent machine 51, the controller 7, and the communication module 52. The controller 7 (control device) controls the actions of the respective sections based on a prescribed management program read from the computer-readable storage medium, thereby realizing the action flow thereof. Figure 11 is a flowchart showing the action flow of the server device 9.

[0051] Referring to Figure 10 In step SP31, the receiver 511 of the parent machine 51 receives the accessory device information S2 transmitted from the transmitter 616 of the child machine 61. The accessory device information S2 is input from the receiver 511 to the signal processing section 514. The information processing section 514 inputs the accessory device information S2 to the communication module 52, and also inputs the control information SI included in the accessory device information S2 to the controller 7.

[0052] Then, in step SP32, the controller 7 updates the control parameter for controlling the actuator drive circuit 7 based on the control information SI input from the signal processing section 514. For example, the controller 7 updates the drive start pressure value of the electromagnetic pressure reducing valve based on the work oil pressure information included in the control information SI. Alternatively, the controller 7 updates the flow rate of the hydraulic pump or the pilot pressure of the control valve based on the work oil flow rate information included in the control information SI. Alternatively, the controller 7 updates the control parameter of the anti-interference control for preventing the main body 2 from interfering with the cutting machine 33, or the control parameter of the tipping alarm control of the work machine 1, based on the dimension information included in the control information SI.

[0053] Next, in step SP33, the information processing section 71 of the controller 7 continuously manages the working condition of the cutting machine 33 during the driving of the working machine 1, thereby storing the working information of the cutting machine 33. As the working information, the cumulative working time, the cumulative number of opening and closing, the cumulative number of rotations, the cumulative number of failures, and the pressure value and the flow value of the working oil of the cutting machine 33 can be stored. The information processing section 71 can also store the cumulative working time, the engine speed, the pressure value and the flow value of the hydraulic pump, the battery voltage value, the number of presses of the limiter contact switch, and the fuel consumption of the working machine 1 in the state where the cutting machine 33 is installed, in addition to the working information of the cutting machine 33.

[0054] Then, in step SP34, the controller 7 determines whether or not an instruction to turn off the power of the working machine 1 is input, based on the operation of the ignition switch of the working machine 1 or the like.

[0055] In the case where the power-off instruction is not input (step SP34: No), the processing of steps SP33 and SP34 is repeatedly executed.

[0056] In the case where the power-off instruction is input (step SP34: Yes), then in step SP35, the information processing section 71 of the controller 7 updates the existing cumulative working information based on the statistical result of the working information of the cutting machine 33 at that time, thereby generating the latest cumulative working information Dl related to the cutting machine 33.

[0057] Figure 12 is a diagram showing an example of the cumulative working information Dl. In this example, the cumulative working time, the cumulative number of opening and closing, and the cumulative number of rotations of the cutting machine 33 are included in the cumulative working information Dl. Other detailed items can also be included in the cumulative working information Dl. The controller 7 inputs the cumulative working information Dl generated by the information processing section 71 to the host machine 51 and the communication module 52. The controller 7 can also input the image data of the cumulative working information Dl to the display device 4 (the first information presentation unit), thereby displaying the cumulative working information Dl on the display device 4. Thereby, the operator of the working machine 1 can determine the necessity of the maintenance work or the exchange work of the cutting machine 33 by referring to the displayed cumulative working information Dl.

[0058] Next, in step SP36, the communication module 52 transmits the attachment information S2 input from the host machine 51 and the cumulative working information Dl input from the controller 7 to the server device 9.

[0059] Next, in step SP37, the receiver 524 determines whether or not the health status information D2 is received from the server device 9.

[0060] In the case where the health state information D2 is not received (step SP37: No), the process of step SP37 is repeatedly executed.

[0061] With reference to Figure 11 In step SP41, the receiver 91 of the server device 9 determines whether the accessory device information S2 and the cumulative work information Dl are received from the communication module 52.

[0062] In the case where the accessory device information S2 and the cumulative work information Dl are not received (step SP41: No), the process of step SP41 is repeatedly executed.

[0063] In the case where the accessory device information S2 and the cumulative work information Dl are received (step SP41: Yes), then in step SP42, the received accessory device information S2 and the cumulative work information Dl are input to the information processing device 94. The analysis section 201 analyzes the health state (the degree of deterioration with years and the presence or absence of operation malfunctions, etc.) of the cutout 33 on the basis of the cumulative work information Dl and the control information S l included in the accessory device information S2. For example, in the case where the health state is analyzed on the basis of the pressure value of the working oil when the cutout 33 performs a certain specific operation, the analysis section 201 extracts data during the period in which the specific operation is performed from the history information of the working oil pressure value included in the cumulative work information Dl, and calculates the maximum value, the minimum value, the average value, and the standard deviation of these data. The analysis section 201 outputs the calculated maximum value, the minimum value, the average value, and the standard deviation as valid data DlO related to the installed cutout 33. The valid data DlO is input from the analysis section 201 to the determination section 203.

[0064] Then, in step SP43, the acquisition section 202 acquires normal data Dl l corresponding to the above-described maximum value, the minimum value, the average value, and the standard deviation, which are previously calculated with respect to cutouts of the same type whose health state is normal. The normal data Dl l is, for example, previously stored in the storage 102. The acquisition section 202 reads out the normal data Dl l from the storage section 102, and inputs the read-out normal data Dl l to the determination section 203.

[0065] Next, in step SP44, the determination section 203 determines whether the health state of the cutting machine 33 is normal or abnormal based on the effective data D10 and the normal data D11. For example, the determination section 203 sets upper and lower threshold values to which a safety margin is added, with respect to the maximum value, the minimum value, the average value, and the standard deviation included in the normal data D11. The determination section 203 compares the maximum value, the minimum value, the average value, and the standard deviation included in the effective data D10 with the respective upper and lower threshold values. The determination section 203 determines that the health state of the installed cutting machine 33 is abnormal in a case where at least one of the maximum value, the minimum value, the average value, and the standard deviation deviates from the allowable range of the upper threshold value or less and the lower threshold value or more. On the other hand, in a case where none of the maximum value, the minimum value, the average value, and the standard deviation deviates from the allowable range, the determination section 203 determines that the health state of the installed cutting machine 33 is normal. The determination section 203 inputs data D12 indicating the result and the content of the determination thereof to the generation section 204.

[0066] In addition, the determination algorithm of the determination section 203 for determining the health state is not limited to the above-described example, and an arbitrary abnormality detection algorithm can be used. The determination section 203 can compare the evolution pattern of the effective data with the evolution pattern of the normal data, for example, and detect an abnormality in a case where the absolute value of the difference between the two exceeds an allowable value. Alternatively, the determination section 203 can detect an abnormality by performing cluster analysis and deviation value analysis on a plurality of pieces of the same type of the attached device as a group.

[0067] Next, in step SP45, the generation section 204 generates health state information D2 related to the installed cutting machine 33 based on the intrinsic identification information SO included in the attached device information S2 received from the communication module 52 and the data D12 input from the determination section 203.

[0068] Figure 13 FIG. 2 is an example of the health state information D2. In this example, the intrinsic identification information of the cutting machine 33, the cumulative working time, the cumulative number of opening and closing, the cumulative number of rotations, the cumulative number of failures, the work distribution, and the determination result of the health state are included in the health state information D2. Other detailed items can also be included in the health state information D2. The generation section 204 inputs the generated health state information D2 to the transmitter 92 via the security module 93. The generation section 204 can also display the health state information D2 on the display device 96 by inputting image data of the health state information D2 to the display device 96.

[0069] Next, in step SP46, the receiver 92 transmits the input health state information D2 to the communication module 52.

[0070] Reference Signs Figure 10When the receiver 524 of the communication module 52 receives the health state information D2 from the server device 9 (step SP37: YES), the health state information D2 is input from the communication module 52 to the host machine 51 and the controller 7.

[0071] The controller 7 can also input the image data of the health state information D2 to the display device 4 (second information presentation unit), thereby displaying the health state information D2 on the display device 4. Thereby, the operator of the working machine 1 can perform a maintenance work or an exchange work of the cutting machine 33 or the like by referring to the displayed health state information D2.

[0072] At this time, in the case where the health state of the cutting machine 33 is shown as "abnormal" in the health state information D2, a prescribed warning sound or a warning message can be output from a speaker (abnormality notification unit) omitted from the illustration, or the corresponding item in the health state information D2 indicating an abnormal value can be displayed in color by the display device 4 (abnormality notification unit), thereby notifying the operator of the working machine 1 that the health state of the cutting machine 33 is abnormal. Thereby, the operator can be reliably made aware that the health state of the cutting machine 33 is in an abnormal state.

[0073] Next, in step SP38, the host machine 51 transmits the cumulative work information D1 input from the controller 7 and the health state information D2 input from the communication module 52 to the submachine 61.

[0074] Referring to Figure 9 , in the case where the cumulative work information D1 and the health state information D2 are received by the submachine 61 (step SP25: YES), next in step SP26, the signal processing section 613 stores the received cumulative work information D1 and the health state information D2 in the storage section 614.

[0075] Next, in step SP27, the signal processing section 613 determines whether or not the power supply to the submachine 61 is to be stopped due to a shortage of the remaining capacity of the button cell or the like.

[0076] In the case where the power supply to the submachine 61 is not to be stopped (step SP27: NO), the operation after step SP21 is repeatedly performed.

[0077] In the case where the power supply to the submachine 61 is to be stopped (step S27: YES), the signal processing section 613 ends the operation of each section of the submachine 61, and stops the power supply to the submachine 61.

[0078] In addition, the submachine 61 can also transmit the cumulative work information D1 stored in the storage section 614 to the server device 9 upon a request from the server device 9. Referring to Figure 6 , the information processing device 94 of the server device 9 transmits a request signal S4 requesting the cumulative work information D1 from the transmitter 92 to the communication module 52. Referring toFigure 5 The communication module 52 inputs the received request signal S4 to the master 51. Referring to Figure 4 The master 51 transmits the input request signal S4 from the transmitter 512 to the slave 61. Referring to Figure 3 The signal processing section 613 of the slave 61 reads the accumulated work information D1 from the storage section 614 in response to the received request signal S4. The slave 61 transmits the accumulated work information D1 read from the storage section 614 to the master 51. The master 51 inputs the received accumulated work information D1 to the communication module 52. The communication module 52 transmits the input accumulated work information D1 to the server device 9. Thus, the server device 9 can acquire the accumulated work information D1 of the accessory equipment required for generating the health state information D2 from the slave 61. The slave 61 can also transmit the inherent identification information S0 and the control information S1 stored in the storage section 614 to the server device 9 upon request from the server device 9.

[0079] In the above description, the generation of the accumulated work information D1 is performed by the controller 7, however, the master 51 can also manage the work status of the accessory equipment, thereby generating the accumulated work information D1 by the master 51.

[0080] In the above description, the accumulated work information D1 and the health state information D2 are transmitted from the master 51 to the slave 61, but in the case where communication between the communication module 52 and the server device 9 is not possible and the health state information D2 cannot be generated stably, only the accumulated work information D1 can be transmitted from the master 51 to the slave 61.

[0081] A work machine of one embodiment of the present application includes: a main body; a work device mounted to the main body, and an accessory equipment exchangeable mounted to the work device; a first communication device provided to the accessory equipment and having a storage section; a second communication device provided to the main body and capable of communicating with the first communication device; and an information processing section provided to the main body, which generates accumulated work information of the accessory equipment mounted to the work device by managing a work status of the accessory equipment, wherein the second communication device transmits the accumulated work information generated by the information processing section to the first communication device, and the first communication device stores the accumulated work information received from the second communication device to the storage section.

[0082] According to the above-described embodiment, the first communication device stores the accumulated work information received from the second communication device to the storage section. Thus, even when the work machine is used in an environment where communication between the second communication device and an external server device is not possible, the storage section can be used to manage correct accumulated work information of the accessory equipment.

[0083] In the above-described aspect, it is further desirable to include a first information presentation unit that presents the accumulated work information generated by the information processing unit to an operator of the work machine.

[0084] According to the above-described aspect, the accumulated work information of the attachment device can be presented to the operator of the work machine to which the attachment device is attached. Thus, the operator can determine the necessity of maintenance work or exchange work of the attachment device by referring to the presented accumulated work information.

[0085] In the above-described embodiment, it is desirable that the first communication device stores the unique identification information of the attachment device to the storage unit, the first communication device transmits the unique identification information read out from the storage unit to the second communication device, the second communication device transmits the accumulated work information generated by the information processing unit and the unique identification information received from the first communication device to the server device, the server device generates state information based on the accumulated work information received from the second communication device and transmits the state information to the second communication device, the state information indicates whether the state of the attachment device determined from the unique identification information received from the second communication device is a normal state or an abnormal state, the second communication device transmits the state information received from the server device to the first communication device, and the first communication device stores the state information received from the second communication device to the storage unit.

[0086] According to the above-described aspect, when the work machine is used in an environment in which communication is possible between the second communication device and the server device, the state information more detailed than the accumulated work information generated by the server device can be managed by the storage unit.

[0087] In the above-described aspect, it is further desirable to include a second information presentation unit that presents the state information received from the server device to the operator of the work machine.

[0088] According to the above-described aspect, the state information of the attachment device can be presented to the operator of the work machine to which the attachment device is attached. Thus, the operator can perform maintenance work or exchange work of the attachment device by referring to the presented state information.

[0089] In the above-described aspect, it is desirable that the second information presentation unit includes an abnormality notification unit that notifies of an abnormality in a case where the state of the attachment device is indicated as an abnormal state in the state information.

[0090] According to the above-described aspect, the abnormality notification unit not only presents the state information but also notifies of the abnormality, and thus it is possible to reliably notify the operator that the state of the attached device is an abnormal state.

[0091] In the above-described aspect, it is desirable that the server device be capable of transmitting a request signal for requesting the cumulative work information stored in the storage section to the second communication device, the second communication device be capable of transmitting the request signal received from the server device to the first communication device, the first communication device be capable of transmitting the cumulative work information read out from the storage section to the second communication device in response to the request signal received from the second communication device, and the second communication device be capable of transmitting the cumulative work information received from the first communication device to the server device.

[0092] According to the above-described aspect, the server device is capable of acquiring the cumulative work information of the attached device required for generating the state information from the first communication device.

[0093] In the above-described aspect, it is desirable that the second communication device further include an encryption / decryption processing section that performs encryption and decryption processing on data transmitted and received between the server device and the second communication device, and the server device further include an encryption / decryption processing section that performs encryption and decryption processing on data transmitted and received between the second communication device and the server device.

[0094] According to the above-described aspect, since the second communication device and the server device each include an encryption / decryption processing section, it is possible to encrypt data transmitted and received between these devices. Thus, it is possible to prevent leakage of confidential data.

[0095] A computer-readable storage medium according to one embodiment of the present application stores a management program for managing an attached device of a work machine, the work machine including a main body and a work device mounted to the main body and to which an attached device is attachable and detachable, the attached device including a first communication device including a storage section, the main body including a control device including an information processing section and a second communication device capable of communicating with the first communication device, and the management program being configured to cause the control device to perform processing of causing the information processing section to generate cumulative work information of the attached device by managing a work condition of the attached device mounted to the work device, causing the second communication device to transmit the cumulative work information generated by the information processing section to the first communication device, and causing the first communication device to store the cumulative work information received from the second communication device in the storage section.

[0096] According to the above-described aspect, the first communication device stores the cumulative work information received from the second communication device in the storage section. Therefore, even when the work machine is used in an environment in which communication between the second communication device and an external server device is not possible, the correct cumulative work information of the attachment device can be managed using the storage section.

[0097] A management method of an attachment device according to one embodiment of the present application is a management method of an attachment device of a work machine that includes a main body and a work device mounted to the main body and to which an exchangeable attachment device is mounted, in which the attachment device is provided with a first communication device including a storage section, the main body is provided with an information processing section and a second communication device that is capable of communicating with the first communication device, and the method includes the steps of: the information processing section generating cumulative work information of the attachment device by managing a work condition of the attachment device mounted to the work device, the second communication device transmitting the cumulative work information generated by the information processing section to the first communication device, and the first communication device storing the cumulative work information received from the second communication device in the storage section.

[0098] According to the above-described aspect, the first communication device stores the cumulative work information received from the second communication device in the storage section. Therefore, even when the work machine is used in an environment in which communication between the second communication device and an external server device is not possible, the correct cumulative work information of the attachment device can be managed using the storage section.

Claims

1. A work machine characterized by comprises: a main body; a work device mounted to the main body, and an exchangeable attachment device mounted to the work device; a first communication device provided to the attachment device and having a storage section; a second communication device provided to the main body and capable of communicating with the first communication device; and an information processing section provided to the main body, which generates cumulative work information of the attachment device by managing a work condition of the attachment device mounted to the work device, wherein the second communication device transmits the cumulative work information generated by the information processing section to the first communication device, the first communication device stores the cumulative work information received from the second communication device to the storage section.

2. The work machine of claim 1, wherein Further comprising: a first information presentation unit which presents the cumulative work information generated by the information processing section to an operator of the work machine.

3. The work machine according to claim 1, wherein the first communication device stores inherent identification information of the attachment device to the storage section, the first communication device transmits the inherent identification information read out from the storage section to the second communication device, the second communication device transmits the cumulative work information generated by the information processing section and the inherent identification information received from the first communication device to a server device, the server device generates state information based on the cumulative work information received from the second communication device, and transmits the state information to the second communication device, the state information indicating whether a state of the attachment device determined from the inherent identification information received from the second communication device is a normal state or an abnormal state, the second communication device transmits the state information received from the server device to the first communication device, the first communication device stores the state information received from the second communication device to the storage section.

4. The work machine of claim 3, wherein Further comprising: a second information presentation unit which presents the state information received from the server device to the operator of the work machine.

5. The work machine according to claim 4, wherein the second information presentation unit includes an abnormality notification unit which notifies of an abnormality in a case where the state of the attachment device is indicated as the abnormal state in the state information.

6. The work machine according to claim 3, wherein the server device is capable of transmitting a request signal for requesting the cumulative work information stored in the storage section to the second communication device, the second communication device transmits the request signal received from the server device to the first communication device, the first communication device transmits the cumulative work information read out from the storage section to the second communication device in response to the request signal received from the second communication device, the second communication device transmits the cumulative work information received from the first communication device to the server device.

7. The work machine according to any one of claims 3 to 6, wherein The second communication device further includes an encryption / decryption processing section that performs encryption and decryption processing on data transmitted and received between the second communication device and the server device, The server device further includes an encryption / decryption processing section that performs encryption and decryption processing on data transmitted and received between the server device and the second communication device.

8. A computer-readable storage medium storing a management program for managing an attachment device of a work machine, the work machine including a main body and a work device to which the attachment device is attached and to which the attachment device is exchangeable, wherein the attachment device includes a first communication device including a storage section, the main body includes a control device including an information processing section and a second communication device capable of communicating with the first communication device, and the management program is configured to cause the control device to perform the following processing: cause the information processing section to generate cumulative work information of the attachment device by managing a work condition of the attachment device attached to the work device, cause the second communication device to transmit the cumulative work information generated by the information processing section to the first communication device, and cause the first communication device to store the cumulative work information received from the second communication device in the storage section.

9. A management method of an attachment device, the management method of an attachment device of a work machine including a main body and a work device to which the attachment device is attached and to which the attachment device is exchangeable, wherein the attachment device includes a first communication device including a storage section, the main body includes an information processing section and a second communication device capable of communicating with the first communication device, and the management method includes the following steps: the information processing section generates cumulative work information of the attachment device by managing a work condition of the attachment device attached to the work device, the second communication device transmits the cumulative work information generated by the information processing section to the first communication device, and the first communication device stores the cumulative work information received from the second communication device in the storage section. ​

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