Construction machine control method and construction machine

Abstract

To efficiently utilize a construction machine.SOLUTION: A control method of a construction machine includes storing an operating value indicating an operation result of the construction machine, storing a backup value based on the operating value, and updating the operating value or the backup value based on at least one of the operating value and the backup value when a predetermined condition is satisfied.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a control method for a construction machine and a construction machine. [Background technology]

[0002] Construction machinery is sometimes provided with a display device (for example, Patent Document 1 and Patent Document 2). The display device described in Patent Document 1 displays a screen requesting a password when restarting the engine. The display device of construction machinery described in Patent Document 2 displays the accumulated operating time (hour meter data) of the construction machinery on the screen. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6537782 [Patent Document 2] Patent No. 5025237 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the construction machines described in Patent Document 1 and Patent Document 2 may not be used efficiently. For example, the display device of the construction machine described in Patent Document 1 displays a screen requesting a passcode regardless of the length of time work is suspended, so the user is required to enter a passcode regardless of the length of time work is suspended. Also, in the construction machine described in Patent Document 2, if the display device is replaced, the hour meter data is updated with backup data, but if the display device is replaced, there is a possibility that the hour meter data will not be the correct value.

[0005] The present invention has been made in view of the above problems, and an object of the present invention is to efficiently utilize construction machines. [Means for solving the problem]

[0006] A construction machine control method according to one aspect of the present disclosure includes storing an operating value indicating the operating performance of a construction machine, storing a backup value based on the operating value, and, when a predetermined condition is satisfied, updating the operating value or the backup value based on at least one of the operating value and the backup value.

[0007] A construction machine according to one aspect of the present disclosure includes a first storage unit, a second storage unit, and a control unit. The first storage unit stores operating values ​​indicating the operational performance of the construction machine. The second storage unit stores backup values ​​based on the operating values. When a predetermined condition is satisfied, the control unit updates the operating values ​​or the backup values ​​based on at least one of the operating values ​​and the backup values. [Effects of the Invention]

[0008] According to the present invention, construction machines can be used efficiently. [Brief explanation of the drawings]

[0009] [Figure 1] 1(a) is a block diagram showing a display device according to embodiment 1. FIG. 1(b) and FIG. 1(c) are diagrams for explaining the display of a release screen. [Figure 2] 10A is a diagram showing a passcode input screen for inputting a passcode, and FIG. 10B is a diagram showing a selection screen for enabling a standby setting. [Figure 3] 10A is a diagram showing a setting change screen, and FIG. 10B is another diagram showing the setting change screen. [Figure 4] 5 is a flowchart showing a display control process according to the first embodiment of the present invention. [Figure 5] FIG. 10 is a block diagram showing a construction device according to a second embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing the contents of a determination table stored in a storage unit of the display device. [Figure 7] FIG. 10 is a diagram showing a status display screen. [Figure 8] 10A is a diagram showing a confirmation screen, and FIG. 10B is a diagram showing an update screen. [Figure 9] 10 is a flowchart showing an operation value update process according to the second embodiment of the present invention. [Figure 10] 10 is a flowchart showing an operation value update process according to the second embodiment of the present invention. [Figure 11] 10 is a flowchart showing an operation value update process according to the second embodiment of the present invention. [Figure 12] 10 is a flowchart showing an operation value update process according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated. The display device according to this embodiment is a display device mounted on a construction machine having an engine start lock function, and is configured to be able to display an unlock screen (hereinafter also referred to as a "passcode input screen") that can release the start lock. In this display device, the display of the unlock screen is made to wait for a certain period of time based on predetermined conditions.

[0011] (Schematic configuration of the display device 10) The configuration of a display device 10 according to a first embodiment of the present invention will be described with reference to Fig. 1(a). Fig. 1(a) is a block diagram showing the display device 10 according to the first embodiment. As shown in Fig. 1, the display device 10 includes a display unit 12, a timer unit 13, a detection unit 15, an operation unit 14, and a display control unit 18. The display device 10 is a display device for construction machinery.

[0012] The display unit 12 is configured by, for example, a liquid crystal display or an organic electroluminescence display. The display unit 12 displays an image. Specifically, the display unit 12 displays a predetermined display screen under the control of the display control unit 18.

[0013] The timekeeping unit 13 is, for example, an RTC (Real Time Clock). The timekeeping unit 13 measures an elapsed time T1. The elapsed time T1 indicates the time that has elapsed since the engine of the construction machine was stopped.

[0014] The detection unit 15 detects an instruction to stop or start the engine of the construction machine. Here, an instruction to start the engine is, for example, a key operation on the construction machine, specifically, turning the key on.

[0015] The operation unit 14 is disposed, for example, around the display unit 12, accepts operations by the operator, and outputs an operation signal corresponding to the operation to the display control unit 18. The operation unit 14 includes at least one operator 16, for example, a push button, and in this embodiment includes six operators 16. The operation unit 14 having such a configuration outputs an operation signal indicating whether or not the operator has operated the operator's operation on the operator. Note that, hereinafter, when the multiple operators 16 of the display device 10 are to be distinguished from one another in the description, the multiple operators 16 may be referred to as operators 16A, 16B, 16C, 16D, 16E, and 16F, respectively.

[0016] The display control unit 18 is configured, for example, by an ECU (Electronic Control Unit) and includes, for example, a control unit 181 and a memory unit 183. The control unit 181 is configured by a processor such as a CPU (Central Processing Unit). The control unit 181 controls the display unit 12, the timer unit 13, and the operation unit 14. The memory unit 183 is configured by a storage device that stores various data and computer programs. The memory unit 183 stores, as various data, setting information input in advance by the operator or status information indicating the status of the construction machine. As the setting information, for example, information indicating whether a standby setting is required or information regarding the standby time T2 is stored. As the information regarding the standby time T2, a plurality of pieces of information that can be selected in advance are stored (see FIG. 3(b)). Furthermore, as the status information, for example, the engine stop time or start time of the construction machine detected by the detection unit 15 is stored.

[0017] In the display control unit 18 having such a configuration, the control unit 181 reads the computer program stored in the storage unit 183 and performs the functions of the display control unit 18. That is, the control unit 181 causes the display unit 12, the timer unit 13, and the operation unit 14 to execute predetermined processes.

[0018] In the display device 10 having such a configuration, various pieces of information about the construction machine, for example, are displayed on the display screen of the display section 12 based on predetermined control by the display control unit 18.

[0019] For example, as shown in FIGS. 1(b) and 1(c), when the engine of the construction machine is stopped, t1, the display device 10 displays a setting selection screen for selecting whether or not to enable a setting to wait for the display of a passcode entry screen, and when the engine is restarted, t2, the display device 10 displays a passcode entry screen for releasing the engine start lock. Furthermore, when the functions of the construction machine are set (not shown), the setting screen is displayed. Note that the engine restart operation time t2 in FIGS. 1(b) and 1(c) indicates the time when the engine start operation was performed, specifically, the time when the key operation of the construction machine was performed. Furthermore, the "passcode entry screen" according to this embodiment corresponds to the "release screen" of the present invention, and the "setting selection screen" according to this embodiment corresponds to the "selection screen" of the present invention.

[0020] Furthermore, when an operation to start the engine of the construction machine is performed, the display device 10 displays a passcode entry screen based on the elapsed time T1 and the standby time T2. Note that, as a prerequisite for executing the process at the time of the engine start operation described below, it is required that a standby setting for passcode entry has been made in advance and that a selection has been made to enable the standby setting when the engine is stopped.

[0021] For example, if the elapsed time T1 exceeds the waiting time T2 (see FIG. 1(b)), a passcode entry screen is displayed. At this time, after the operator inputs the passcode, the construction machine is ready to start its engine. In other words, if the display device 10 determines that the elapsed time T1 exceeds the waiting time T2, it causes the display unit 12 to display the passcode entry screen. In other words, the operator cannot start the engine of the construction machine unless he or she authenticates the passcode using the passcode entry screen.

[0022] On the other hand, if the elapsed time T1 does not exceed the waiting time T2 (see FIG. 1(c)), the passcode entry screen is not displayed. At this time, the engine of the construction machine starts without the operator having to enter a passcode. In other words, if the display control unit 18 determines that the elapsed time T1 does not exceed the waiting time T2, it does not display the passcode entry screen on the display unit 12. Then, the display device 10 displays the initial screen on the display unit 12. In other words, the operator can start the engine of the construction machine without performing passcode authentication using the passcode entry screen.

[0023] Next, as examples of display screens of the display unit 12, the above-mentioned "passcode input screen," "selection screen for enabling standby setting," and "setting change screen" will be described with reference to the drawings.

[0024] (Screen display example: Passcode entry screen) The passcode input screen SCA displayed on the display unit 12 will be described with reference to FIG. 2(a). The passcode input screen SCA is a screen for the operator to input a passcode to unlock the engine start lock. The passcode input screen SCA includes a passcode input area 40 and an operation content display area 46. The passcode input area 40 includes a plurality of numeric input areas 41. In this embodiment, it includes four numeric input areas 41A to 41D. The four numeric input areas 41A to 41D are arranged side by side in a fixed direction. A number as a passcode is input into each of the four numeric input areas 41A to 41D. More specifically, the fourth digit of the passcode is input into the numeric input area 41A. The third digit of the passcode is input into the numeric input area 41B. The second digit of the passcode is input into the numeric input area 41C. The first digit of the passcode is input into the numeric input area 41D.

[0025] Furthermore, on the passcode input screen SCA, a hatched cursor CS is displayed in one of the four number input areas 41A to 41D, indicating the number input area 41 into which the operator should input a number.

[0026] The operation content display area 46 is a display area that displays operation contents that can be operated by the operator, and is configured, for example, by a plurality of selectable sections 46A to 46F arranged in a straight line. These selectable sections 46A to 46F are displayed corresponding to the operators 16A to 16F of the operation unit 14 described above, and the display content is switched by operating the operators 16A to 16F corresponding to the selectable sections 46A to 46F. For example, when the operator operates (presses the button) the operator 16C corresponding to the selectable section 46C, the number in the selected number input area 41 decreases by one. For example, the number in the selected number input area 41 decreases from "5" to "4." On the other hand, when the operator operates the operator 16D corresponding to the selectable section 46D, the number in the selected number input area 41 increases by one. For example, the number in the selected number input area 41 increases from "5" to "6." Furthermore, when the operator operates the operator 16F corresponding to the selected portion 46F, the number in the selected number input area 41 is confirmed, and the cursor CS moves to the next digit's number input area 41. Each of the multiple selected portions 46A to 46F is, for example, an object.

[0027] (Screen display example: Selection screen for enabling standby settings) Next, the "standby setting activation selection screen SCB" displayed when the engine is stopped will be described. Fig. 2(b) is a diagram showing the standby setting activation selection screen SCB.

[0028] As shown in FIG. 2(b), the selection screen SCB includes a target display area 48, a selection request display area 49, and an operation content display area 46. The target display area 48 is an example of a "first display area" in the present invention. The selection request display area 49 is an example of a "second display area" in the present invention. The operation content display area 46 is an example of a "third display area" in the present invention.

[0029] An image showing the target of the standby setting is displayed in the target display area 48. For example, an image showing a state in which the engine is locked is displayed in the target display area 48.

[0030] An image prompting the user to select whether or not to set the standby mode is displayed in the selection request display area 49. For example, a message image such as "Do you want to lock the passcode now?" is displayed in the selection request display area 49.

[0031] An image for selecting whether or not to set standby is displayed in the operation content display area 46. For example, "No" is displayed in the selection section 46A. "Yes" is displayed in the selection section 46F.

[0032] On the selection screen SCB, when the operator 16A corresponding to the selection section 46A displaying "No" is operated (the button is pressed), the passcode lock is not immediately set. That is, the standby setting described with reference to FIGS. 1(b) and 1(c) is enabled. Note that if the operator does not operate the operator 16A ("No") or 16F ("Yes") for a predetermined period of time, that is, if a non-operation state continues for a predetermined period of time, the standby setting is enabled.

[0033] On the other hand, when the operator 16F corresponding to the selection section 46F displaying "Yes" on the selection screen SCB is operated (a button is pressed), the passcode lock is immediately set, i.e., the standby setting described with reference to Figures 1(b) and 1(c) is invalidated.

[0034] When an operation to start the engine is performed, the control unit 181 determines whether or not the standby setting is enabled. When the control unit 181 determines that the standby setting is enabled, the control unit 181 determines whether or not the elapsed time T1 exceeds the standby time T2. When the control unit 181 determines that the elapsed time T1 exceeds the standby time T2, the control unit 181 causes the display unit 12 to display the passcode entry screen SCA (FIG. 2(a)). On the other hand, when the control unit 181 determines that the elapsed time T1 does not exceed the standby time T2, the control unit 181 does not cause the display unit 12 to display the passcode entry screen SCA.

[0035] On the other hand, when the control unit 181 determines that the standby setting is not enabled, it causes the display unit 12 to display the passcode entry screen SCA when an operation to start the engine is performed.

[0036] (Screen display example: setting change screen) The setting change screen SCC and the setting change screen SCD will be described with reference to Fig. 3(a) and Fig. 3(b). Fig. 3(a) is a diagram showing the setting change screen SCC. Fig. 3(b) is another diagram showing the setting change screen SCD.

[0037] First, the setting change screen SCC will be described with reference to Fig. 3(a). As shown in Fig. 3(a), the setting change screen SCC includes a setting item display area 51 and a setting status display area 52.

[0038] Images indicating setting items are displayed in the setting item display area 51. The setting item display area 51 includes a first setting item display area 51A, a second setting item display area 51B, and a third setting item display area 51C.

[0039] The first setting item display area 51A displays "Start-up lock." When the operator selects "Start-up lock," the operator can switch the passcode lock function between ON and OFF.

[0040] The second setting item display area 51B displays "Relock time." When the operator selects "Relock time," the operator can change the waiting time T2.

[0041] The third setting item display area 51C displays "Change Passcode." When the operator selects "Change Passcode," the operator can change the currently set passcode to a passcode of their choice.

[0042] An image showing the setting state is displayed in the setting state display area 52. The setting state display area 52 includes a first setting state display area 52A, a second setting state display area 52B, and a third setting state display area 52C.

[0043] The first setting status display area 52A, the second setting status display area 52B, and the third setting status display area 52C correspond to the first setting item display area 51A, the second setting item display area 51B, and the third setting item display area 51C, respectively. For example, in response to the "relock time" displayed in the second setting item display area 51B, "5 minutes" is displayed in the second setting status display area 52B.

[0044] When the operator selects "relock time", a setting change screen SCD for "relock time" is displayed on the display unit 12 as shown in FIG. 3(b).

[0045] On the setting change screen SCC, a hatched cursor CS is displayed in one setting item display area 51A of the three setting item display areas 51. The operator can move the cursor CS by operating the operators 16C and 16D of the operation unit 14. The operator can then select and confirm a desired setting item by operating the operator 16F.

[0046] Next, the setting change screen SCD will be described with reference to Fig. 3(b). This setting change screen SCD is a setting screen for selecting and determining the setting content for each setting item displayed in the setting item display area 51 in Fig. 3(a). As shown in Fig. 3(b), the setting change screen SCD includes a setting candidate display area 53. The setting candidate display area 53 includes a first setting candidate display area 53A, a second setting candidate display area 53B, a third setting candidate display area 53C, a fourth setting candidate display area 53D, and a fifth setting candidate display area 53E.

[0047] On the setting change screen SCD, a hatched cursor CS is displayed in one setting candidate display area 53A of the five setting candidate display areas 53. The operator can move the cursor CS by operating the controls 16B to 16E of the operation unit 14. Then, the operator can confirm the setting by operating the control 16F. For example, the waiting time T2 (re-lock time) can be set to "5 minutes."

[0048] (Display control processing) A display control process by the control unit 181 according to the first embodiment of the present invention will be described with reference to Fig. 4. Fig. 4 is a flowchart showing the display control process according to the first embodiment of the present invention.

[0049] Step S102: Detect engine stop. When this process is completed, proceed to step S104.

[0050] Step S104: The control unit 181 determines whether or not a key operation has been performed on the construction machine. If the control unit 181 determines that a key operation has not been performed (step S104: No), the control unit 181 waits for a certain period of time and returns to step S104 again. If the control unit 181 determines that a key operation has been performed (step S104: Yes), the process proceeds to step S106.

[0051] Step S106: The control unit 181 determines whether the engine start lock is enabled. If the control unit 181 determines that the engine start lock is not enabled (step S106: No), the process proceeds to step S116, where the engine is started. That is, the engine is started without displaying the passcode entry screen SCA. On the other hand, if the control unit 181 determines that the engine start lock is enabled (step S106: Yes), the process proceeds to step S108.

[0052] Step S108: The control unit 181 determines whether the elapsed time T1 has exceeded the standby time T2. If the control unit 181 determines that the elapsed time T1 has not exceeded the standby time T2 (step S108: No), the process proceeds to step S116, where the engine is started. That is, the engine is started without displaying the passcode entry screen SCA. On the other hand, if the control unit 181 determines that the elapsed time T1 has exceeded the standby time T2 (step S108: Yes), the process proceeds to step S110.

[0053] Step S110: The control unit 181 displays a passcode input screen SCA on the display unit 12. When this process ends, the process proceeds to step S114.

[0054] Step S114: The control unit 181 determines whether or not the passcode authentication is successful. If the control unit 181 determines that the passcode authentication is not successful (step S114: No), the process returns to step S110. On the other hand, if the control unit 181 determines that the passcode authentication is successful (step S114: Yes), the process proceeds to step S116.

[0055] Step S116: The engine is put into a startable state. In the process of step S116, for example, the control unit 181 displays an engine start permission display screen (not shown) on the display unit 12, and requests the operator to perform the start operation again. When this process ends, the series of display control processes ends.

[0056] As another example of processing in step S116, the control unit 181 can set the engine to a startable state without displaying an engine start permission display screen (not shown) on the display unit 12. In this case, the operator does not need to perform the start operation again, and the engine starts with the initial start operation.

[0057] As described above with reference to FIGS. 1 to 4, in the display device 10 according to this embodiment and the construction machine equipped with this display device 10, when an engine start operation is performed, the control unit 181 in the display device 10 determines whether the elapsed time T1 exceeds the standby time T2. If the control unit 181 determines that the elapsed time T1 exceeds the standby time T2, it causes the display unit 12 to display a passcode entry screen SCA for disabling the function of restricting engine start. Therefore, if work is to be suspended for a long period of time, the passcode entry screen SCA is displayed. As a result, it is possible to prevent theft of the construction machine. On the other hand, if the control unit 181 determines that the elapsed time T1 does not exceed the standby time T2, it does not cause the display unit 12 to display the passcode entry screen SCA. Therefore, if work is suspended for only a short period of time, the engine can be restarted without disabling the passcode.

[0058] Therefore, for example, if the engine of a construction machine is stopped temporarily during work, the engine can be started without displaying the passcode entry screen SCA when restarting the engine. This allows the operator to resume work without being forced to perform the cumbersome unlocking procedure. Furthermore, if the engine has been stopped for a predetermined period of time or longer, the passcode entry screen SCA is displayed when restarting the engine, preventing theft and other incidents even if the engine key is inserted. Furthermore, by displaying a selection screen that allows the operator to select whether to enable or disable the passcode entry standby setting when the engine is stopped, the operator can immediately execute the engine start lock at the end of work, etc., preventing the operator from having to wait for the lock to be activated. In this way, the construction machine can be used efficiently.

[0059] The features of the display device according to the above-described embodiment can be restated as follows. That is, the display device for construction machinery is a display unit for displaying an image; a control unit that controls the display unit; a timing unit that measures an elapsed time indicating the time that has elapsed since the engine of the construction machine was stopped; a storage unit that stores the standby time, When the engine start operation is performed, The control unit determining whether the elapsed time exceeds the waiting time; When it is determined that the elapsed time exceeds the waiting time, a cancellation screen for canceling the function of restricting the start of the engine is displayed on the display unit, If it is determined that the elapsed time does not exceed the waiting time, the release screen is not displayed on the display unit.

[0060] Furthermore, in the construction machine display device, the standby time is configured to be changeable.

[0061] In addition, in the construction machinery display device, when the engine is stopped, the control unit is configured to display a selection screen on the display unit that allows the user to select whether or not to enable the standby setting.

[0062] In addition, in the above-mentioned construction machine display device, When the engine start operation is performed, The control unit Determine whether the standby setting is enabled or not, If it is determined that the above standby setting is enabled, determining whether the elapsed time exceeds the waiting time; When it is determined that the elapsed time exceeds the waiting time, the release screen is displayed on the display unit; If it is determined that the elapsed time does not exceed the waiting time, the release screen is not displayed on the display unit, If it is determined that the above standby setting is not enabled, When the engine start operation is performed, the release screen is displayed on the display unit.

[0063] In addition, the selection screen in the construction machine display device is At least one of a first display area that displays an image indicating a target of the standby setting and a second display area that displays an image that prompts the user to select whether or not the standby setting is required; and a third display area that displays an image for selecting whether or not the standby setting is required.

[0064] [Embodiment 2] (Schematic configuration of construction machine 100) Next, a construction machine 100 equipped with a display device 10 according to a second embodiment will be described with reference to Fig. 5. The construction machine according to this embodiment stores an operating value indicating the operating record of the construction machine and its backup value in different devices, and periodically determines whether both values ​​are correct. Fig. 5 is a block diagram showing a construction machine 100 according to the second embodiment of the present invention. Explanations of parts that overlap with the display device 10 according to the first embodiment will be omitted.

[0065] 5, the construction machine 100 includes, in addition to the display device 10, an engine section 500, a hydraulic system 600, a machine body 700, and a main control device 900. The construction machine 100 is, for example, a hydraulic excavator.

[0066] The engine unit 500 generates power. The hydraulic system 600 controls the inflow and outflow of hydraulic oil that operates the machine body 700. The machine body 700 is made up of, for example, a lower traveling body, an upper rotating body, and a working machine.

[0067] The main control device 900 is configured by, for example, an ECU (Electronic Control Unit), and controls the entire construction machine 100. The main control device 900 includes a control unit 910, a storage unit 920, and a measurement unit 930.

[0068] The control unit 910 is configured with a processor such as a CPU (Central Processing Unit). The storage unit 920 is configured with a storage device that stores various data and computer programs. The storage unit 920 stores, as various data, setting information input in advance by an operator, for example.

[0069] The measuring unit 930 measures an operating value using an hour meter that indicates the operating performance of the engine unit 500. The operating value measured by the measuring unit 930 is transmitted to the storage unit 183 of the display device 10 and also to the storage unit 920.

[0070] The storage unit 920 stores the operating value measured by the measurement unit 930 as a control device side operating value B (backup value).

[0071] The display device 10 includes a display section 12, a timer section 13, a detector section 15, an operation section 14, and a display control unit 18. The display control unit 18 includes a controller 181 and a memory section 183.

[0072] The storage unit 183 stores the operation value transmitted by the measurement unit 930 of the main control unit 900 as the display device operation value A. More specifically, the operation value is transmitted from the main control unit 900 every time a predetermined time elapses. The predetermined time is, for example, 0.1 seconds. The storage unit 183 then stores the transmitted operation value as the display device operation value A.

[0073] The storage unit 183 also stores a judgment table used in the process of determining whether the display device operation value A and the control device operation value B are correct, and judgment thresholds ThA, ThB, and ThC. The threshold ThA is the threshold for the display device operation value A. The threshold ThA is, for example, 10 hours. The threshold ThB is the threshold for the control device operation value B. The threshold ThB is, for example, 10 hours. Note that here, the threshold ThA and the threshold ThB are the same value, but the threshold ThA and the threshold ThB may be different values.

[0074] The display unit 12 displays an image indicating the display device side operating value A stored in the storage unit 183, for example, on a status display screen shown in FIG.

[0075] As explained above, in the construction machine 100 according to this embodiment, the display device operating value A is successively updated to the control device operating value B. Therefore, generally, approximately the same operating value is stored in both the memory unit 920 of the main control device 900 and the memory unit 183 of the display device 10. In detail, the display device operating value A and the control device operating value B are approximately the same value.

[0076] However, for example, if at least one of the main control device 900 and the display device 10 is replaced, the display device-side operating value A and the control device-side operating value B may differ significantly. As a result, it may not be possible to display appropriate operating values ​​on the display unit 12. Therefore, in the construction machine 100 of this embodiment, the control unit 181 of the display device 10 updates the display device-side operating value A with the control device-side operating value B, or updates the control device-side operating value B with the display device-side operating value A, based on the relationship between the display device-side operating value A and the control device-side operating value B.

[0077] (Operating value update process) The following describes the update process of the operating values ​​of the construction machine 100 of this embodiment. In the following description, the control unit 181 of the display device 10 executes the correctness determination process as the determination means, but this is not limited to this, and for example, the control unit 910 of the main control device 900 may execute the correctness determination process.

[0078] The update process of the operation value of the control unit 181 will be described with reference to Fig. 6. Fig. 6 is a diagram showing the contents of a judgment table stored in the storage unit 183 of the display device 10. In Fig. 6, the horizontal axis represents the display device side operation value A, and the vertical axis represents the control device side operation value B. In Fig. 6, the first region R1 is indicated by dot hatching. The second region R2 is indicated by diagonal hatching. The third region R3 is indicated by horizontal hatching. The fourth region R4 is indicated by vertical hatching.

[0079] The control unit 181 of the display device 10 determines that the display device is in the first region R1 when the display device operation value A is less than the threshold value ThA and the control device operation value B is equal to or greater than the threshold value ThB. This occurs, for example, when the display device 10 is replaced with a new one, in which the control device operation value B is sufficiently greater than the threshold value ThB, but the display device operation value A is reset and therefore lower than the threshold value ThA. In this case, the control unit 181 determines that the control device operation value B is correct as the operation value. Then, the control unit 181 updates the display device operation value A with the control device operation value B. As a result, the display device operation value A becomes the appropriate operation value.

[0080] Furthermore, when the display device operation value A is equal to or greater than the threshold value ThA and the control device operation value B is less than the threshold value ThB, the control unit 181 determines that the second region R2 exists. This occurs, for example, when the main control unit 900 is replaced with a new one, in which case the display device operation value A is sufficiently greater than the threshold value ThA, but the control device operation value B is reset and therefore lower than the threshold value ThB. In this case, the control unit 181 determines that the display device operation value A is correct as the operation value. Then, the control unit 181 updates the control device operation value B with the display device operation value A. As a result, the control device operation value B becomes the appropriate operation value.

[0081] Furthermore, the control unit 181 determines that the first region R1 exists when the display device operation value A is equal to or greater than the threshold value ThA, the control device operation value B is equal to or greater than the threshold value ThB, and the difference Δ between the display device operation value A and the control device operation value B is less than the threshold value ThC. This is the normal case, for example, where there is no significant deviation between the display device operation value A and the control device operation value B. In this case, the control unit 181 determines that the control device operation value B is correct as the operation value. Then, the control unit 181 updates the display device operation value A with the control device operation value B. As a result, the display device operation value A becomes the appropriate operation value.

[0082] Furthermore, the control unit 181 determines that the third region R3 exists when the display device operation value A is equal to or greater than the threshold value ThA, the control device operation value B is equal to or greater than the threshold value ThB, and the difference Δ between the display device operation value A and the control device operation value B is equal to or greater than the threshold value ThC. This occurs, for example, when either the display device 10 or the main control device 900 is replaced with a used product, resulting in a large difference Δ. In this case, the display unit 12 displays a confirmation screen. Depending on the operator's selection on the confirmation screen, the control unit 181 determines whether the display device operation value A or the control device operation value B is correct as the operation value. The confirmation screen (referenced SCF, described later) is a screen that allows the operator to confirm the usage status of the display device 10 and the main control device 900. The confirmation screen will be described later with reference to FIG. 8.

[0083] Furthermore, the control unit 181 determines that the fourth region R4 exists when the display device operation value A is less than the threshold value ThA, the control device operation value B is less than the threshold value ThB, and there is a history of replacement of the display device 10 or the main control device 900. This occurs, for example, when the construction machine 100 is shipped from the factory or when both the display device 10 and the main control device 900 are replaced with new ones, and both the display device operation value A and the control device operation value B are 0. In this case, the control unit 181 determines that the control device operation value B is correct as the operation value. The control unit 181 then updates the display device operation value A with the control device operation value B. As a result, the display device operation value A becomes the appropriate operation value.

[0084] Furthermore, the control unit 181 determines that the first region R1 exists when the display device operation value A is less than the threshold value ThA, the control device operation value B is less than the threshold value ThB, and there is no history of replacement of the display device 10 or the main control device 900. This occurs when not much time has passed since the construction machine 100 was shipped from the factory, and both the display device operation value A and the control device operation value B are not very large. In this case, the control unit 181 determines that the control device operation value B is correct as the operation value. The control unit 181 then updates the display device operation value A with the control device operation value B. As a result, the display device operation value A becomes the appropriate operation value.

[0085] (Screen display example: Status display screen) Next, the display images displayed on the display unit 12 of the display device 10 in the construction machine 100 will be described with reference to the drawings. First, the status display screen SCE displayed on the display unit 12 will be described with reference to Fig. 7. Fig. 7 is a diagram showing the status display screen SCE.

[0086] As shown in FIG. 7, the status display screen SCE includes a display area for displaying various information about the construction machine 100 and an operation content display area 46.

[0087] The display areas for displaying various information include a time display area 60 located on the top left side of the screen, an error display area 62 located in the top center of the screen, an operating value display area 64 located on the top right side of the screen, a fuel information display area 66 located on the middle left side of the screen, a camera image display area 68 located in the center of the screen, an icon display area 70 and an RPM display area 72 located on the middle right side of the screen, and an option information display area 74 located on the bottom side of the screen.

[0088] The operating value display area 64 displays operating values ​​that indicate the operating results of the construction machine 100. In detail, the operating value display area 64 displays the display device side operating value A stored in the memory unit 183 of the display device 10. In this embodiment, the operating value is shown as time.

[0089] The fuel information display area 66 is a display area showing the remaining fuel oil status, and displays, for example, a graphic indicating that it is the fuel information display area 66 and a gauge 662 showing the remaining amount of fuel as a bar graph.

[0090] (Screen display example: Factory shipping confirmation screen) Next, with reference to Fig. 8(a) and Fig. 8(b), a description will be given of a confirmation screen SCF and an update screen SCG displayed on the display unit 12. Fig. 8(a) is a diagram showing the confirmation screen SCF. Fig. 8(b) is a diagram showing the update screen SCG.

[0091] As shown in Fig. 8(a), the confirmation screen SCF is a screen for allowing the operator to confirm the usage status of the display device 10 and the main control device 900. In the example shown in Fig. 8(a), the confirmation screen SCF shows an example of a factory shipment confirmation screen. The factory shipment confirmation screen is a screen for confirming whether the monitor (display device 10) and the main control device 900 are in their factory shipment state.

[0092] The confirmation screen SCF includes a message display area 81 and a selection area 82.

[0093] An image showing a confirmation item is displayed in the message display area 81. For example, a message image such as "Is this the first startup since production?" is displayed in the message display area 81.

[0094] The selection area 82 displays an image for selecting one of the confirmation items in an alternative manner. The selection area 82 includes a first selection area 82A and a second selection area 82B. For example, "YES" is displayed in the first selection area 82A. "NO" is displayed in the second selection area 82B.

[0095] On the confirmation screen SCF, a hatched cursor CS is displayed in one of the two selection areas 82. The operator can move the cursor CS by operating the operators 16C and 16D of the operation unit 14. Then, the operator can select a desired selection item by operating the operator 16F.

[0096] When "YES" is selected on the confirmation screen SCF, the update screen SCG is displayed as shown in FIG. 8(b).

[0097] The update screen SCG includes a message display area 81 and a selection area 82.

[0098] A message image such as "The hour meter will be set to the factory default state" is displayed in the message display area 81. When the operator performs a confirmation operation (presses the operation button 16F), the display device side operating value A is updated with the control device side operating value B.

[0099] (Screen display example: Monitor, hydraulic ECU replacement confirmation screen) Next, a case where the confirmation screen SCF is a monitor and hydraulic ECU replacement confirmation screen will be described. The monitor and hydraulic ECU replacement confirmation screen is a screen for confirming whether or not both the monitor (display device 10) and the hydraulic ECU (main control device 900) have been replaced.

[0100] In this case, a message image such as "Have you replaced both the LCD monitor and the hydraulic ECU?" is displayed in the message display area 81 on the confirmation screen SCF.

[0101] Also, on the update screen SCG, a message image such as "The hour meter of the hydraulic ECU will be overwritten on the liquid crystal monitor" is displayed in the message display area 81.

[0102] (Screen display example: Monitor replacement confirmation screen) Next, a case where the confirmation screen SCF is a monitor replacement confirmation screen will be described. The monitor replacement confirmation screen is a screen for confirming whether or not only the monitor (display device 10) has been replaced.

[0103] In this case, a message image such as "Did you replace only the LCD monitor?" is displayed in the message display area 81 on the confirmation screen SCF.

[0104] Also, on the update screen SCG, a message image such as "The hour meter of the hydraulic ECU will be overwritten on the liquid crystal monitor" is displayed in the message display area 81.

[0105] (Screen display example: Hydraulic ECU replacement confirmation screen) Next, a case where the confirmation screen SCF is a hydraulic ECU replacement confirmation screen will be described. The hydraulic ECU replacement confirmation screen is a screen for confirming whether or not only the hydraulic ECU (main control device 900) has been replaced.

[0106] In this case, a message image such as "Have you replaced only the hydraulic ECU?" is displayed in the message display area 81 on the confirmation screen SCF.

[0107] Also, on the update screen SCG, a message image such as "The hour meter on the liquid crystal monitor will be overwritten with the hydraulic ECU" is displayed in the message display area 81.

[0108] (Screen display example: Monitor, hydraulic ECU replacement confirmation screen) Next, a case where the confirmation screen SCF is a monitor and hydraulic ECU replacement confirmation screen will be described. The monitor and hydraulic ECU replacement confirmation screen is a screen for confirming whether both the monitor (display device 10) and the hydraulic ECU (main control device 900) have been replaced.

[0109] In this case, a message image such as "Have you replaced both the liquid crystal monitor and the hydraulic ECU?" is displayed in the message display area 81 on the confirmation screen SCF.

[0110] Also, on the update screen SCG, a message image such as "The hour meter of the hydraulic ECU will be overwritten on the liquid crystal monitor" is displayed in the message display area 81.

[0111] (Operating value update process) 9 to 12 are used to explain the operation value update process performed by the control unit 181 according to the second embodiment of the present invention. Figures 9 to 12 are flowcharts showing the operation value update process according to the second embodiment of the present invention.

[0112] Step S202: The display device 10 receives the display device side operating value A. When this process ends, the process proceeds to step S204.

[0113] Step S204: The control unit 181 determines whether the display device operation value A is equal to or greater than the threshold value ThA. If the control unit 181 determines that the display device operation value A is not equal to or greater than the threshold value ThA (Step S204: No), the process proceeds to Step S214. On the other hand, if the control unit 181 determines that the display device operation value A is equal to or greater than the threshold value ThA (Step S204: Yes), the process proceeds to Step S206.

[0114] Step S206: The control unit 181 determines whether the control device side operation value B is equal to or greater than the threshold value ThB. If the control unit 181 determines that the control device side operation value B is not equal to or greater than the threshold value ThB (Step S206: No), the process proceeds to Step S212. On the other hand, if the control unit 181 determines that the control device side operation value B is equal to or greater than the threshold value ThB (Step S206: Yes), the process proceeds to Step S208.

[0115] Step S208: The control unit 181 determines whether the value of |display device operation value A−control device operation value B| is less than the threshold value ThC. That is, the control unit 181 determines whether the difference Δ between the display device operation value A and the control device operation value B is less than the threshold value ThC. If the control unit 181 determines that the difference Δ between the display device operation value A and the control device operation value B is not less than the threshold value ThC (Step S208: No), the process proceeds to Step S222 shown in FIG. 10. On the other hand, if the control unit 181 determines that the difference Δ between the display device operation value A and the control device operation value B is less than the threshold value ThC (Step S208: Yes), the process proceeds to Step S210.

[0116] Step S210: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0117] Step S212: The control unit 181 determines that the display device operation value A is correct, and overwrites (updates) the control device operation value B with the display device operation value A. This ends the update process.

[0118] Step S214: The control unit 181 determines whether the control device side operation value B is equal to or greater than the threshold value ThB. If the control unit 181 determines that the control device side operation value B is not equal to or greater than the threshold value ThB (Step S214: No), the process proceeds to Step S218. On the other hand, if the control unit 181 determines that the control device side operation value B is equal to or greater than the threshold value ThB (Step S214: Yes), the process proceeds to Step S216.

[0119] Step S216: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0120] Step S218: The control unit 181 determines whether or not there has been a past replacement history. If the control unit 181 determines that there has been no past replacement history (step S218: No), the process proceeds to step S242 shown in Fig. 11. On the other hand, if the control unit 181 determines that there has been a past replacement history (step S218: Yes), the process proceeds to step S220.

[0121] Step S220: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0122] Step S222: The control unit 181 displays a monitor replacement confirmation screen on the display unit 12. When this process ends, the process proceeds to step S224.

[0123] Step S224: The control unit 181 determines whether monitor replacement has been selected on the monitor replacement confirmation screen. If the control unit 181 determines that monitor replacement has not been selected (step S224: No), the process proceeds to step S228. On the other hand, if the control unit 181 determines that monitor replacement has been selected (step S224: Yes), the process proceeds to step S226.

[0124] Step S226: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0125] Step S228: The control unit 181 displays a hydraulic ECU replacement confirmation screen on the display unit 12. When this process ends, the process proceeds to step S230.

[0126] Step S230: The control unit 181 determines whether hydraulic ECU replacement has been selected on the hydraulic ECU replacement confirmation screen. If the control unit 181 determines that hydraulic ECU replacement has not been selected (step S230: No), the process proceeds to step S234. On the other hand, if the control unit 181 determines that hydraulic ECU replacement has been selected (step S230: Yes), the process proceeds to step S232.

[0127] Step S232: The control unit 181 determines that the display device operation value A is correct, and overwrites (updates) the control device operation value B with the display device operation value A. This ends the update process.

[0128] Step S234: The control unit 181 displays a monitor and hydraulic ECU replacement confirmation screen on the display unit 12. When this process ends, the process proceeds to step S236.

[0129] Step S236: The control unit 181 determines whether "Monitor, hydraulic ECU not replaced" has been selected on the monitor, hydraulic ECU not replaced confirmation screen. If the control unit 181 determines that "Monitor, hydraulic ECU not replaced" has not been selected (step S236: No), the process proceeds to step S222. On the other hand, if the control unit 181 determines that "Monitor, hydraulic ECU not replaced" has been selected (step S236: Yes), the process proceeds to step S238.

[0130] Step S238: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0131] As shown in steps S222 to S238, the control unit 181 causes the display unit 12 to cyclically display the "monitor replacement confirmation screen," "hydraulic ECU replacement confirmation screen," and "monitor, hydraulic ECU non-replacement confirmation screen." Furthermore, the control unit 181 causes the display unit 12 to display the confirmation screens in order of likelihood of being selected by the operator. The processing of steps S222 to S238 corresponds to the processing in the third region R3 shown in FIG. 6.

[0132] Step S242: The control unit 181 displays a factory shipping confirmation screen on the display unit 12. When this process ends, the process proceeds to step S244.

[0133] Step S244: The control unit 181 determines whether or not "Factory Default" has been selected on the factory default confirmation screen. If the control unit 181 determines that "Factory Default" has not been selected (Step S244: No), the process proceeds to Step S248. On the other hand, if the control unit 181 determines that "Factory Default" has been selected (Step S244: Yes), the process proceeds to Step S246.

[0134] Step S246: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0135] Step S248: The control unit 181 displays a monitor and hydraulic ECU replacement confirmation screen on the display unit 12. When this process ends, the process proceeds to step S250.

[0136] Step S250: The control unit 181 determines whether or not "Replace Monitor / Hydraulic ECU" has been selected on the monitor / hydraulic ECU replacement confirmation screen. If the control unit 181 determines that "Replace Monitor / Hydraulic ECU" has not been selected (step S250: No), the process proceeds to step S254 shown in Fig. 12. On the other hand, if the control unit 181 determines that "Replace Monitor / Hydraulic ECU" has been selected (step S250: Yes), the process proceeds to step S252.

[0137] Step S252: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0138] Step S254: The control unit 181 displays a monitor replacement confirmation screen on the display unit 12. When this process ends, the process proceeds to step S256.

[0139] Step S256: The control unit 181 determines whether monitor replacement has been selected on the monitor replacement confirmation screen. If the control unit 181 determines that monitor replacement has not been selected (step S256: No), the process proceeds to step S260. On the other hand, if the control unit 181 determines that monitor replacement has been selected (step S256: Yes), the process proceeds to step S258.

[0140] Step S258: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0141] Step S260: The control unit 181 displays a hydraulic ECU replacement confirmation screen on the display unit 12. When this process ends, the process proceeds to step S262.

[0142] Step S262: The control unit 181 determines whether hydraulic ECU replacement has been selected on the hydraulic ECU replacement confirmation screen. If the control unit 181 determines that hydraulic ECU replacement has not been selected (step S262: No), the process proceeds to step S266. On the other hand, if the control unit 181 determines that hydraulic ECU replacement has been selected (step S262: Yes), the process proceeds to step S264.

[0143] Step S264: The control unit 181 determines that the display device operation value A is correct, and overwrites (updates) the control device operation value B with the display device operation value A. This ends the update process.

[0144] Step S266: The control unit 181 displays a monitor and hydraulic ECU replacement confirmation screen on the display unit 12. When this process ends, the process proceeds to step S268.

[0145] Step S268: The control unit 181 determines whether "Monitor, hydraulic ECU not replaced" has been selected on the "Monitor, hydraulic ECU not replaced" confirmation screen. If the control unit 181 determines that "Monitor, hydraulic ECU not replaced" has not been selected (step S268: No), the process proceeds to step S242. On the other hand, if the control unit 181 determines that "Monitor, hydraulic ECU not replaced" has been selected (step S268: Yes), the process proceeds to step S270.

[0146] Step S270: The control unit 181 determines that the control device side operation value B is correct, and overwrites (updates) the display device side operation value A with the control device side operation value B. This ends the update process.

[0147] As shown in steps S242 to S270, the control unit 181 causes the display unit 12 to cyclically display a "factory shipping confirmation screen," a "monitor, hydraulic ECU replacement confirmation screen," a "monitor replacement confirmation screen," a "hydraulic ECU replacement confirmation screen," and a "monitor, hydraulic ECU non-replacement confirmation screen." Furthermore, the control unit 181 causes the display unit 12 to display the confirmation screens in order of likelihood of being selected by the operator. Note that the processing of steps S242 to S270 corresponds to the processing in the fourth region R4 shown in FIG. 6.

[0148] As described above with reference to FIGS. 5 to 12, in the construction machine 100, the control unit 181 of the display device 10 updates the display device operation value A with the control device operation value B, or updates the control device operation value B with the display device operation value A, based on the relationship between the control device operation value B and the display device operation value A. Therefore, the display device operation value A or the control device operation value B can be updated to an appropriate value depending on the replacement status of the main control device 900 and the display device 10. This allows the construction machine 100 to be used efficiently.

[0149] The construction machine 100 according to the present embodiment described above has the following features: That is, it is provided with a determination unit (control unit 181 of the display device 10) that determines which of the operation values ​​(display device-side operation values ​​A) indicating the operation performance of the construction machine and its backup value (controller-side operation values ​​B) is appropriate, and the determination unit executes a determination process based on a predetermined determination table.

[0150] The above-described determination process includes a first determination process in which the operating value and the backup value are compared with predetermined threshold values ​​that have been set.

[0151] The above-described determination process also includes a second determination process based on the difference between the operating value and the backup value.

[0152] The above-mentioned determination process also includes a third determination process based on the number of times the determination process has been executed.

[0153] The above-described determination process also includes a fourth determination process based on the usage state of the devices that measure the operating values ​​and backup values.

[0154] From another perspective, the construction machine 100 of this embodiment is equipped with measuring equipment (measurement unit 930) that measures operating values ​​and backup values ​​that indicate the operating performance of the construction machine, and a display unit 12 that is configured to be able to display a confirmation screen for each confirmation item that requests the operator to confirm the usage status of the measuring equipment, and that displays multiple confirmation screens in a predetermined order in response to operation by the operator.

[0155] The confirmation screen also has a selection area where one option can be selected alternatively.

[0156] Furthermore, when a predetermined selection process is executed, the process corresponding to the selection is executed, and then the display screen is changed to another screen.

[0157] In addition, when a predetermined selection process is executed, the currently displayed confirmation screen transitions to another confirmation screen, and when another selection process is executed, a reconfirmation screen is displayed requesting further confirmation of the contents of the currently displayed confirmation screen.

[0158] The reconfirmation screen also has a selection area where one option can be selected alternatively.

[0159] Furthermore, when a predetermined selection process is executed, an execution screen for the process corresponding to the selection is displayed, and when another selection process is executed, the confirmation screen is displayed again.

[0160] After the execution screen is displayed, the construction machine startup screen is displayed.

[0161] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 12). However, the present invention is not limited to the above-described embodiments and can be embodied in various forms without departing from the spirit of the present invention. The drawings mainly show each component in a schematic manner for ease of understanding, and the thickness, length, number, etc. of each component shown in the drawings may differ from the actual components due to the convenience of creating the drawings. Furthermore, the materials, shapes, dimensions, etc. of each component shown in the above-described embodiments are merely examples and are not particularly limited, and various modifications are possible within a range that does not substantially depart from the effects of the present invention.

[0162] <Notes on the invention> The construction machine display device according to the present invention includes a display unit configured to display a release screen for releasing the restriction on engine start of the construction machine, and the display unit displays the release screen based on the elapsed time since the engine was stopped and a predetermined waiting time.

[0163] A construction machine according to the present invention includes the above-described display device for a construction machine.

[0164] A construction machine control method according to one aspect of the present disclosure is a construction machine control method capable of displaying a release screen on a display unit to release a restriction on starting the engine of the construction machine. The construction machine control method includes setting a standby setting mode in which the engine can be started without displaying the release screen on the display unit during a standby period from when the engine is stopped until a standby time has elapsed, and making it possible to select whether to disable the standby setting mode. [Explanation of symbols]

[0165] 10 Display device 12 Display section 13 Timing section 15 Detection unit 100 Construction Machinery 181 Control Unit 183 Storage section SCA passcode entry screen (unlock screen) SCB setting selection screen (selection screen) T1 Elapsed time T2 waiting time

Claims

1. storing an operation value indicating the operation record of the construction machine; storing a backup value based on the operating value; updating the operating value or the backup value based on at least one of the operating value and the backup value when a predetermined condition is satisfied. A method for controlling construction machinery.

2. The predetermined condition includes that the operation value is equal to or greater than a first threshold value and the backup value is equal to or greater than a second threshold value. The method for controlling a construction machine according to claim 1.

3. The predetermined condition includes that a difference between the operating value and the backup value is less than a third threshold value. A method for controlling a construction machine according to claim 1 or 2.

4. The predetermined condition includes that the operating value is less than a first threshold value and the backup value is equal to or greater than a second threshold value. The method for controlling a construction machine according to claim 1.

5. the predetermined condition includes that the operating value is less than a first threshold value, the backup value is less than a second threshold value, and there is a history of a part replacement in either a first storage unit that stores the operating value or a second storage unit that stores the backup value. The method for controlling a construction machine according to claim 1.

6. a first storage unit that stores the operating value is provided in an ECU of the construction machine; a second storage unit for storing the backup value is provided in the display unit of the construction machine; A method for controlling a construction machine according to any one of claims 1 to 5.

7. a first storage unit that stores an operation value indicating the operation record of the construction machine; a second storage unit that stores a backup value based on the operating value; a control unit that updates the operating value or the backup value based on at least one of the operating value and the backup value when a predetermined condition is satisfied; Construction machinery.

Images