Construction machine management system, control device, mobile terminal, and control program

Abstract

To provide a construction machine management system that can manage construction machines and reliable implementation of pre-start inspections with a simple configuration that does not require information communication with a management server or the like.SOLUTION: A mobile terminal receives input of a construction machine ID and inspection results of pre-start inspection items of a construction machine. When the construction machine ID, and a construction machine ID corresponding to the pre-start inspection items, and all inspection results are input, the mobile terminal displays a two-dimensional barcode containing a predetermined code, the construction machine ID, user information, and date and time information. The control device reads the two-dimensional barcode displayed on the mobile terminal, determines whether or not to permit operation of the construction machine based on information on the two-dimensional barcode to control permission to operate the construction machine, and stores the construction machine ID, the user information, the date and time information, etc. included in the two-dimensional barcode, in a storage portion.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a construction machine management system, a control device, a mobile terminal, and a control program.

Background Art

[0002] Key management of construction machines at a construction site is an important task. Also, pre-operation inspection of construction machines is an essential task for safely using construction machines in the best condition.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, keys of construction machines, work records of pre-operation inspections, etc. are managed at the management office of a construction site, etc. However, key management and management of inspection work records have been complicated and troublesome. Although it is conceivable to manage the keys of construction machines deployed on-site and the implementation of pre-operation inspections by utilizing information and communication technologies such as the Internet, the system introduction cost and operation management costs such as maintenance and inspection become enormous. Also, there are many construction sites with unfavorable information and communication environments, and there is a problem that construction machines involving information and communication cannot be appropriately managed at such construction sites.

[0005] An object of the present disclosure is to provide a construction machine management system, a control device, a mobile terminal, and a control program that can manage the reliable implementation of construction machines and pre-operation inspections with a simple configuration that does not require information communication with a management server, etc., even at a construction site with an unfavorable information and communication environment.

Means for Solving the Problems

[0006] A construction machine management system according to an aspect of the present disclosure is a construction machine management system including a control device that controls the operation permission of a construction machine and a mobile terminal. The mobile terminal includes a terminal storage unit that stores user information of the construction machine, an input unit that receives an input of a construction machine ID of the construction machine and an inspection result related to a pre-start inspection item of the construction machine, and when the construction machine ID and the inspection result related to the pre-start inspection item are input, a display unit that displays a two-dimensional barcode including a predetermined code, the input construction machine ID, and the user information stored in the terminal storage unit. The control device includes a reading unit that reads the two-dimensional barcode displayed on the display unit, a control unit that determines whether to permit the operation of the construction machine based on the predetermined code included in the two-dimensional barcode read by the reading unit, an operation permission unit that permits the operation of the construction machine when it is determined by the control unit to be permitted, and a storage unit that stores the construction machine ID and the user information included in the two-dimensional barcode read by the reading unit.

Effect of the Invention

[0007] According to the present disclosure, a simple configuration that does not require information communication with a management server or the like can be realized, and even at a construction site where the information communication environment is not favorable, the construction machine and the reliable implementation of the pre-start inspection can be managed.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0009] The construction machine management system and the like according to the embodiment of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. Also, at least a part of the embodiments described below may be arbitrarily combined.

[0010] (Embodiment 1) FIG. 1 is a schematic diagram showing the configuration of the construction machine management system according to Embodiment 1, FIG. 2 is a block diagram showing the configuration of the construction machine management system according to Embodiment 1, and FIG. 3 is a schematic diagram showing the external appearance of the control device 1 and the mobile terminal 2. The construction machine management system according to Embodiment 1 includes one or more control devices 1 and one or more mobile terminals 2. The control device 1 is attached to the construction machine 3. The construction machine 3 is a machine used in civil engineering and construction work, and includes aerial work platforms, forklifts, and the like.

[0011] FIG. 1 shows a situation where a construction company provides a plurality of construction machines 3 to a single construction site and a plurality of on-site workers use the construction machines 3. It is assumed that the on-site workers can operate any construction machine 3 arranged at the construction site where they work. A control device 1 for controlling the operation permission of the construction machine 3 is attached to the construction machine 3. A mobile terminal 2 for obtaining the operation permission of the construction machine 3 is lent to the plurality of on-site workers. The mobile terminal 2 is managed by the construction company using a mobile device management (MDM) service or the like. The on-site worker uses the mobile terminal 2 lent by the construction company as a key to start the construction machine 3. Also, the on-site worker uses the mobile terminal 2 as a pre-operation inspection tool for the construction machine 3. Hereinafter, the on-site worker will be appropriately referred to as the user.

[0012] <Configuration of Control Device 1> As shown in FIG. 2, the control device 1 is a device for controlling the operation permission of the construction machine 3. The control device 1 includes a control unit 11, a storage unit 12, a reading unit 13, a start / stop button 14, a status display unit 15, a drive circuit 16, a relay (operation permission unit) 17, and a communication unit 18. The control device 1 has a housing 10 that is externally attached to an existing construction machine 3. The housing 10 has, for example, a vertically long rectangular parallelepiped shape and houses the control unit 11, the storage unit 12, the drive circuit 16, the relay 17, and the communication unit 18 inside. The reading unit 13, the start / stop button 14, and the status display unit 15 are provided on the front part of the housing 10. A construction machine ID is displayed on the front part of the housing 10. For example, a construction machine ID label 19 for displaying the construction machine ID is attached to the housing 10.

[0013] The control unit 11 is a microcomputer having an arithmetic circuit such as a CPU (Central Processing Unit), internal storage devices such as a ROM (Read Only Memory) and a RAM (Random Access Memory), I / O terminals, a timer unit 11a, etc. Connected to the control unit 11 are a storage unit 12, a reading unit 13, a start / stop button 14, a status display unit 15, a drive circuit 16, and a communication unit 18. The timer unit 11a included in the control unit 11 is a real-time clock and measures the date and time (including the Gregorian calendar, month and day, and time). The control unit 11 executes processing related to the management of the construction machine 3 by executing a control program (program product) P1 stored in the storage unit 12 described later. Note that the processing related to the management of the construction machine 3 may be realized software-wise or partially or entirely realized hardware-wise. The control unit 11 has a normal operation mode and a power-saving mode (sleep mode). The power-saving mode is, for example, a deep sleep mode. In the deep sleep mode, the built-in regulator of the control unit 11 is throttled and the operations of the CPU, RAM, etc. are also stopped. However, even in the deep sleep mode, a circuit for waking up the control unit 11 upon receiving an external interrupt signal, the timer unit 11a, etc. are operating.

[0014] The storage unit 12 is a non-volatile memory such as an EEPROM (Electrically Erasable Programmable ROM) or a flash memory. The storage unit 12 stores a control program P1 for causing the control unit 11 to execute the operation permission control process of the construction machine 3. Also, the storage unit 12 stores the usage history of the construction machine 3 by the user. Details will be described later.

[0015] The reading unit 13 is a barcode reader or a camera that optically reads a two-dimensional barcode including a QR code (registered trademark) etc. displayed on the portable terminal 2, and gives the data of the read two-dimensional barcode to the control unit 11. The housing 10 has a window portion 10a for reading a two-dimensional barcode at a substantially central portion of the front surface, and the reading unit 13 is provided in the window portion 10a.

[0016] The start / stop button 14 is a push button for starting or stopping the control device 1. When the start / stop button 14 is pressed, an external interrupt signal is input to the control unit 11. Note that the push button is just an example, and as long as the start or stop of the control device 1 can be operated, its configuration is not particularly limited.

[0017] The status display unit 15 is a light-emitting element, a liquid crystal display panel, etc. for displaying the operating status of the control device 1. For example, as shown in FIG. 3, the status display unit 15 includes a lamp 15a indicating the energization state of the control device 1, a lamp 15b indicating whether the operation of the construction machine 3 is permitted, a lamp 15c indicating the error state of the control device 1, a 7-segment display 15d representing the error content, etc. The lamps 15a, 15b, and 15c are, for example, LEDs. In addition, for more reliable notification, in the notification of the error state, a notification means by voice may be provided instead of (or in addition to) the lamp lighting. The notification means by voice is, for example, a speaker, a buzzer, etc.

[0018] As shown in FIG. 2, the relay 17 is a circuit that cuts off an operation permission signal (or an operation prohibition signal) output from the control device 1 to the control circuit 31 of the construction machine 3. The drive circuit 16 is a circuit that turns the relay 17 on and off according to a control signal output from the control unit 11. The control device 1 includes a first terminal 1a and a second terminal 1b connected to the construction machine 3. The first terminal 1a and the second terminal 1b are provided, for example, on the lower surface of the housing 10. The first terminal 1a is connected to one end of the relay 17, and the other end of the relay 17 is connected to a predetermined potential related to the operation permission signal (or the operation prohibition signal). The second terminal 1b is connected to a power supply circuit (not shown). The second terminal 1b is connected to the battery 32 mounted on the construction machine 3. The power supply circuit receives power supply from the battery 32 and supplies the power necessary for the operation of the control device 1. The first terminal 1a is connected, for example, to the control circuit 31 mounted on the construction machine 3. The control circuit 31 is, for example, a circuit related to the operation of the construction machine 3. When relay 17 is on, an operation permission signal (or operation prohibition signal) is output to the control circuit 31, and the operation of the construction machine 3 is permitted (or prohibited), that is, the construction machine 3 can (or cannot) be operated. When relay 17 is off, the output of the operation permission signal (or operation prohibition signal) to the control circuit 31 is cut off, and the movement of the construction machine 3 is prohibited (or permitted), that is, the construction machine 3 cannot be started (or can be operated). Note that relay 17 may be an a-contact relay or a b-contact relay. The relationship between operation permission and prohibition and the on / off state of relay 17 may be determined as appropriate. In addition, relay 17 is an example of a means (operation permission unit) for permitting or prohibiting the operation of the construction machine 3, but is not limited thereto. As long as it is a circuit or component capable of permitting or prohibiting the operation of the construction machine 3, other means (for example, a signal output circuit that outputs a signal of a predetermined voltage indicating permission or prohibition, a semiconductor switch, a photocoupler, an actuator that moves a predetermined member) may be adopted.

[0019] The communication unit 18 is a circuit that transmits the data of the usage history of the construction machine 3 stored in the storage unit 12 to the outside. The communication unit 18 is a wireless communication circuit that directly wirelessly connects to an external communication device according to a predetermined communication protocol, or a communication circuit that is wired-connected to an external communication device. The communication unit 18 may have a connection portion to which a history recording medium is connected, and be a circuit that outputs usage history data to the history recording medium connected to the connection portion.

[0020] <Configuration of the mobile terminal 2> The mobile terminal 2 is a portable terminal device called a PDA (Personal Digital Assistant) such as a smartphone, a mobile phone, or a tablet terminal. The mobile terminal 2 includes a processing unit 21, a terminal storage unit 22, a display unit 23, and an operation unit (input unit) 24.

[0021] The processing unit 21 is a microcomputer having an arithmetic circuit such as a CPU or a multi-core CPU, an internal storage device such as a ROM or a RAM, an I / O terminal, a timing unit 21a, etc. A terminal storage unit 22, a display unit 23, and an operation unit 24 are connected to the processing unit 21. The timing unit 21a included in the processing unit 21 is a real-time clock and measures the date and time (including the Gregorian calendar, month, day, and time). The processing unit 21 executes processing related to the management of the construction machine 3 by executing an application program (program product) P2 stored in the terminal storage unit 22. Note that the processing related to the management of the construction machine 3 may be realized software-wise or partially or entirely hardware-wise.

[0022] The terminal storage unit 22 is a non-volatile memory such as an EEPROM or a flash memory, and stores an application program P2 necessary for the management processing of the construction machine 3. Further, the terminal storage unit 22 stores user information of the portable terminal 2. The user information includes information such as, for example, the user's affiliation (company), name, employee number, personal ID, and the ID of the portable terminal 2 lent to the user within the construction site.

[0023] The application program P2 may be distributed from an external server via a network. The portable terminal 2 may also acquire the application program P2 from an external server by communication and write it into the storage unit 12. The application program P2 may also be recorded in a recordable manner on a recording medium 2525 such as a semiconductor memory such as a flash memory, an optical disk, a magneto-optical disk, or a magnetic disk. The portable terminal 2 reads out the application program P2 and stores it in the terminal storage unit 22.

[0024] The display unit 23 is a liquid crystal panel, an organic EL display, an electronic paper, etc. The display unit 23 displays various images based on the image data given from the processing unit 21. In the first embodiment, the display unit 23 displays a two-dimensional barcode necessary to obtain the operation permission of the construction machine 3.

[0025] The operation unit 24 is, for example, a touch sensor provided on the surface or inside of the display unit 23, a mechanical operation button, or the like. The processing unit 21 receives, via the operation unit 24, an input of information necessary to operate the construction machine 3. Further, other means other than manual input (voice input device, fingerprint authentication device, face authentication device, image reading device such as an employee ID card, etc.) may be adopted to receive information input, thereby achieving further simplification and rationalization.

[0026] FIG. 4 is a flowchart showing the processing procedures of the control device 1 and the mobile terminal 2 according to Embodiment 1, and FIGS. 5 and 6 are schematic diagrams showing examples of operation screens according to Embodiment 1.

[0027] <Processing of the mobile terminal 2> The processing unit 21 of the mobile terminal 2 activates the application program P2 and executes the following processing. First, the processing unit 21 determines whether or not the user information of the mobile terminal 2 and the construction machine 3 is unregistered (the user information has never been registered in the application program P2 in the past) (step S111). If it is determined that the user information is unregistered (step S111: YES), the processing unit 21 displays a user information registration screen on the display unit 23 as shown in FIG. 5A and acquires the user information (step S112). Specifically, the processing unit 21 receives information such as the user's affiliation, employee number, name, etc. The user can input the user information into the mobile terminal 2 by operating the operation unit 24, for example, and the processing unit 21 acquires the user information via the operation unit 24. The processing unit 21 stores the acquired user information in the terminal storage unit 22.

[0028] If the user information has been registered in the past (step S111: NO), or if the registration of the user information is completed in the process of step S112, as shown in FIG. 5B, the registered user information is displayed on the display unit 23 (step S113). When the construction machine information input button is operated, the processing unit 21 displays a construction machine ID input screen as shown in FIG. 5C and acquires the construction machine ID (step S114). The user can operate the operation unit 24 to input the construction machine ID displayed on the construction machine ID sticker 19 into the portable terminal 2, and the processing unit 21 acquires the construction machine ID via the operation unit 24. In addition, means such as reading the construction machine ID displayed on the construction machine ID sticker 19 with the camera built in the portable terminal 2, or pasting a two-dimensional barcode containing the same information in the vicinity of the construction machine ID sticker 19 in advance and reading it with the camera to acquire the construction machine ID may be adopted. Further simplification and rationalization can be achieved by such means.

[0029] Next, the processing unit 21 determines whether the construction machine ID acquired in step S111 is the construction machine ID of the construction machine 3 for which the pre-start inspection has not been performed by the user yet today (step S115). As will be described later, the terminal storage unit 22 stores the construction machine ID of the construction machine 3 for which the pre-start inspection has been performed in association with the date and time information of the pre-start inspection. The processing unit 21 refers to the information stored in the terminal storage unit 22 to check whether there is a record in which the construction machine ID is the same as the construction machine ID acquired in step S114 and the month and day are the same as the month and day indicated by the clock unit 21a.

[0030] If it is determined that the pre-start inspection has not been performed (step S115: YES), the processing unit 21 displays the pre-start inspection items of the construction machine 3 on the display unit 23 as shown in FIG. 6 (step S116) and accepts the inspection result with the operation unit 24 (step S117). For example, the processing unit 21 displays a plurality of inspection items, the main points when performing the inspection, and check boxes. The user operates the operation unit 24 to input the inspection result into the portable terminal 2 by checking the check box.

[0031] The processing unit 21 checks all inspection items and determines whether the inspection is completed (step S118). If it is determined that the inspection is not completed (step S118: NO), the processing unit 21 returns the process to step S117 and continues the reception process of the inspection results. If it is determined that the inspection is completed (step S118: YES), or if it is determined in step S115 that the inspection has been completed (step S115: NO), the processing unit 21 generates a two-dimensional barcode including a predetermined code described later, the acquired construction machine ID, the user information stored in the terminal storage unit 22, the date and time information indicated by the timer unit 21a, and the newly issued sequence number (step S119). Note that the initial value of the sequence number may be a value obtained by a random number generation process. Note that the processing unit 21 may generate a two-dimensional barcode using data obtained by scrambling or encrypting the above information. The processing unit 21 displays the generated two-dimensional barcode on the display unit 23 as shown in FIG. 3 (step S120).

[0032] Note that when the processing unit 21 determines in step S118 that the pre-operation inspection is completed, the processing unit 21 associates the construction machine ID of the construction machine 3 determined to be inspected and the date and time information indicated by the timer unit 21a and stores them in the terminal storage unit 22.

[0033] If the processing unit 21 does not satisfy the end conditions such as timeout or the application end button being pressed (step S121: NO), the processing unit 21 returns the process to step S120 and continues to display the two-dimensional barcode. When the end conditions are satisfied (step S121: YES), the processing unit 21 closes and ends the application program P2 (step S122).

[0034] <Processing of the control device 1> When the power supply of the control device 1 is turned on, the control unit 11 performs an initialization process (step S131) and then shifts to the sleep mode (step S132). If the start / stop button 14 is not pressed (step S133: NO), the control unit 11 remains in the sleep mode state. If the start / stop button 14 is pressed (step S133: YES), power supply is started, and the control unit 11 reads the two-dimensional barcode displayed on the display unit 23 of the mobile terminal 2 using the reading unit 13 (step S134), and determines whether to permit the operation of the construction machine 3 based on the information included in the read two-dimensional barcode (step S135).

[0035] Specifically, the control unit 11 checks whether the predetermined code is a regular code. The predetermined code does not identify a plurality of users and each of the plurality of construction machines 3, and a common predetermined code is registered in a plurality of mobile terminals 2 and construction machines 3. For example, a plurality of construction machines 3 used at one construction site and the mobile terminals 2 of a plurality of users working at that construction site store a common predetermined code. The control device 1 and the mobile terminal 2 use the predetermined code to confirm the relationship between the plurality of construction machines 3 and the users used at the construction site. In addition, the control unit 11 checks whether the date and time indicated by the date and time information included in the two-dimensional barcode is within a range before a predetermined time, for example, within a range 30 seconds before, from the date and time indicated by the clock unit 11a. By checking the date and time information, it is possible to prevent the use of an illegal hard copy of the two-dimensional barcode (for example, using a screen shot of the two-dimensional barcode display screen, using a camera image of the two-dimensional barcode display screen, etc.). Furthermore, the control unit 11 checks whether the storage unit 12 stores the same sequence number as the sequence number included in the two-dimensional barcode as a usage history. By checking the sequence number, it is possible to prevent the use of an illegal hard copy of the two-dimensional barcode. With these measures, it is possible to prevent unauthorized operation of the construction machine 3 by someone who has not performed the pre-work inspection. When the predetermined code is a regular code, the date and time information of the two-dimensional barcode is within a predetermined range in the past from the current time, and the sequence number is newly issued, the processing unit 21 permits the operation of the construction machine 3.

[0036] If it is determined in step S135 that the operation is not permitted (step S135: NO), the control unit 11 returns the process to step S134 and continues the reading process of the two-dimensional barcode. The control unit 11 may turn on the lamp of the status display unit 15 according to the cause of non-permission. In addition, in the notification of the error state, instead of (or in addition to) turning on the lamp, a voice notification means may be provided. The voice notification means is, for example, a speaker, a buzzer, or the like.

[0037] If it is determined that the operation is permitted (step S135: YES), the processing unit 21 controls the relay 17 to be in an on state (closed state) (step S136). When the relay 17 is in the on state, the construction machine 3 can be operated. Further, the control unit 11 stores the information included in the two-dimensional barcode read in step S134 in the storage unit 12 as a usage history (step S137).

[0038] FIG. 7 is a conceptual diagram showing the usage history stored in the storage unit 12. As shown in FIG. 7A, the information of the usage history is, for example, information in which the construction machine ID, user information, date and time information, sequence number, etc. included in the two-dimensional barcode are associated with the data ID. In addition, although FIG. 4 shows an example in which the usage history is recorded when the operation is permitted, as shown in FIG. 7B, the storage unit 12 may be configured to store, as the usage history, information in which event information is associated with the data ID in addition to the above information. That is, the control unit 11 may be configured to store these events in the storage unit 12 as a usage history at an appropriate timing such as when the operation is permitted, when the operation is prohibited, when an error occurs, and when the use of the construction machine 3 ends. Examples of the event information include information indicating that the operation was permitted in step S135, information indicating that the operation was not permitted in step S135, error information, information indicating that relay 17 was turned off to stop the operation of the construction machine 3 in step S139, and the like. The "date and time information" is information indicating the time when each event occurred. More specifically, when the control unit 11 turns off relay 17 in the process of step S139, it stores event information indicating the stop of the operation of the construction machine 3 and the end time of use (date and time information) in the storage unit 12. When it is determined in step S135 that the operation is not permitted or when other errors occur, the control unit 11 stores event information indicating non - permission of operation or occurrence of an error and the time of non - permission of operation or occurrence of an error (date and time information) in the storage unit 12. The above - described event information and date and time information can be utilized later as feedback information regarding the reliable implementation of the construction machine 3 and the pre - start inspection, such as for checking the operating status of the construction machine 3.

[0039] After the operation of the construction machine 3 is permitted and until the start / stop button 14 is pressed (step S138: NO), relay 17 remains in the on state and the construction machine 3 can be used. When the start / stop button 14 is pressed after the operation of the construction machine 3 is permitted (step S138: YES), the control unit 11 controls relay 17 to the off state (open state) (step S139), shifts to the sleep state (step S140), and returns the process to step S133.

[0040] According to the construction machine management system according to the first embodiment configured as described above, a simple configuration that does not require information communication with a management server or the like can be realized, and even at a construction site where the information communication environment is not favorable, the reliable implementation of the construction machine 3 and the pre - start inspection can be managed.

[0041] The mobile terminal 2 necessary for operating the construction machine 3 can be handled on-site by the construction machine 3 and lent to the user. Therefore, the usage qualification and authority of the construction machine 3 can be easily confirmed through the operation permission process using the mobile terminal 2. Also, since the usage history is recorded in the storage unit 12 of the control device 1, an effect of suppressing unauthorized use (by persons other than the regular lender) of the mobile terminal 2 can be expected. The two-dimensional barcode necessary for operating the construction machine 3 is not displayed unless the pre-operation inspection of the construction machine 3 is performed on the work day and the inspection results are input. Therefore, the user can be obligated to perform the pre-operation inspection. The results of the pre-operation inspection can be stored in the storage unit 12 as the usage history of the construction machine 3. In this way, with a simple configuration that does not require information communication with a management server or the like, the operation permission of the construction machine 3 and the reliable implementation of the pre-operation inspection can be efficiently managed, thereby enabling the introduction and operation of an inexpensive system.

[0042] Also, since the operation permission determination of the construction machine 3 is performed using the date and time information and the sequence number, unauthorized use of the construction machine 3 using a hard copy of the two-dimensional barcode can be prevented.

[0043] Furthermore, since the control device 1 can be externally attached to an existing construction machine 3, it is not necessary to greatly change the specifications of the construction machine 3, and the introduction cost of the construction machine management system can be suppressed.

[0044] Furthermore, since the usage history accumulated in the storage unit 12 can be read out and confirmed via the communication unit 18 of the control device 1, the history of the user of the construction machine 3, the usage date and time, etc. can be confirmed. Thereby, the operating status of the construction machine 3 can be analyzed and the presence or absence of unauthorized use can be investigated.

[0045] (Embodiment 2) The construction machine management system according to Embodiment 2 differs from that of Embodiment 1 in the display method of the two-dimensional barcode and the usage permission procedure of the construction machine 3. Since the other configurations of the construction machine management system are the same as those of the construction machine management system according to Embodiment 1, the same reference numerals are given to the same parts, and detailed descriptions thereof are omitted.

[0046] FIG. 8 is a flowchart showing the processing procedures of the control device 1 and the mobile terminal 2 according to Embodiment 2. The mobile terminal 2 executes the same processing as steps S111 to S122 of Embodiment 1 (steps S211 to S222). However, the processing unit 21 of the mobile terminal 2 differs from that of Embodiment 1 in that it sequentially updates and displays the two-dimensional barcode by repeatedly executing the processing of steps S219 and S220. By updating the two-dimensional barcode, the content of the date and time information is mainly updated.

[0047] The control unit 11 of the control device 1 reads the two-dimensional barcode by executing the same processing as steps S131 to S134 (steps S231 to S235). However, it differs from Embodiment 1 in that the two-dimensional barcode is read at different points in time.

[0048] The control unit 11 determines whether to permit the operation of the construction machine 3 based on the information included in the two two-dimensional barcodes read at different points in time (step S236). The control unit 11 performs the same confirmation as in Embodiment 1 for the predetermined code and the sequence number respectively included in the two two-dimensional barcodes. Further, the control unit 11 checks whether the date and time indicated by the date and time information included in the two two-dimensional barcodes is within a range before the date and time indicated by the timekeeping unit 11a by a predetermined time. Furthermore, the control unit 11 checks whether the interval between the dates and times indicated by the date and time information included in the two two-dimensional barcodes is within a predetermined time. The predetermined time may be determined according to the reading speed of the reading unit 13. The predetermined time is, for example, a time of several seconds.

[0049] By reading a plurality of two-dimensional barcodes that are sequentially updated and displayed on the display unit 23 of the mobile terminal 2 and checking the interval of the date and time information, it is possible to more reliably prevent the unauthorized use of the two-dimensional barcodes.

[0050] When it is determined to permit the operation (step S236: YES), and it is the first operation permission after initialization, the control unit 11 performs clock synchronization of the clock unit 11a of the control device 1 using the date and time information included in the two-dimensional barcode (step S237). The subsequent processing is the same as that in steps S136 to S140 of Embodiment 1. Since the clock unit 21a of the mobile terminal 2 is usually adjusted to the correct time, the time of the clock unit 11a can be adjusted using the information of the two-dimensional barcode displayed on the mobile terminal 2. Also, by checking the interval of the date and time information of the sequentially updated two-dimensional barcode, it is possible to confirm that it is the information of the two-dimensional barcode displayed on the mobile terminal 2 rather than a hard copy, so that the time of the clock unit 11a can be set without error.

[0051] As described above, according to the construction machine management system according to Embodiment 2, it is possible to prevent unauthorized use of the construction machine 3 using a hard copy of the two-dimensional barcode.

[0052] Also, using the information of the two-dimensional barcode displayed on the display unit 23 of the mobile terminal 2, the clock synchronization of the clock unit 11a of the control device 1 can be performed without error.

Explanation of Signs

[0053] 1 Control device 2 Mobile terminal 3 Construction machine 10 Housing 11 Control unit 12 Storage unit 13 Reading unit 14 Start / stop button 15 Status display unit 16 Drive circuit 17 Relay (operation permission unit) 18 Communication unit 21 Processing unit 22 Terminal memory unit 23 Display unit 24 Operation unit

Claims

1. A construction machine management system comprising a control device for controlling the operation permission of a construction machine and a mobile terminal, wherein the mobile terminal has a terminal storage unit for storing user information of the construction machine, an input unit for receiving an input of the construction machine ID of the construction machine and an inspection result related to the pre-start inspection items of the construction machine, and a display unit for displaying a two-dimensional barcode including a predetermined code, the input construction machine ID, and the user information stored in the terminal storage unit when the construction machine ID and the inspection result related to the pre-start inspection items are input, and is provided with, wherein the control device has a reading unit for reading the two-dimensional barcode displayed on the display unit, a control unit for determining whether to permit the operation of the construction machine based on the predetermined code included in the two-dimensional barcode read by the reading unit, an operation permission unit for permitting the operation of the construction machine when it is determined by the control unit that permission is granted, and a storage unit for storing the construction machine ID and the user information included in the two-dimensional barcode read by the reading unit, a construction machine management system provided with.

2. The two-dimensional barcode includes time information and / or a sequence number, wherein the control unit determines whether to permit the operation of the construction machine based on the predetermined code, time information, and / or sequence number included in the read two-dimensional barcode. The construction machine management system according to claim 1.

3. The mobile terminal sequentially updates and displays the two-dimensional barcode including time information, wherein the control unit permits the operation of the construction machine when the time interval indicated by the time information included in the two-dimensional barcodes read at different points in time, the predetermined code, and the sequence number satisfy predetermined conditions. The construction machine management system according to claim 2.

4. The control device has a window portion provided with the reading unit and is provided with a housing externally attached to the construction machine, and the operation permission unit includes a relay for blocking an operation permission or operation prohibition signal output to the control circuit of the construction machine and is housed in the housing. The construction machine management system according to any one of claims 1 to 3.

5. A control device for controlling the operation permission of a construction machine, comprising a reading unit for reading a two-dimensional barcode including a predetermined code, the construction machine ID of the construction machine, and the user information of the construction machine, A control unit that determines whether to permit the operation of the construction machine based on the predetermined code included in the two-dimensional barcode read by the reading unit; An operation permission unit that permits the operation of the construction machine when it is determined by the control unit that permission is granted; A storage unit that stores the construction machine ID included in the two-dimensional barcode read by the reading unit and the user information; A control device comprising the above.

6. A mobile terminal for managing a construction machine, comprising: A terminal storage unit that stores user information of the construction machine; An input unit that accepts input of the construction machine ID of the construction machine and the inspection result related to the pre-start inspection items of the construction machine; A display unit that displays a two-dimensional barcode including a predetermined code, the input construction machine ID, and the user information stored in the terminal storage unit when the construction machine ID and the inspection result related to the pre-start inspection items are input; A mobile terminal comprising the above.

7. In a computer of a mobile terminal for managing a construction machine, Accept input of the construction machine ID of the construction machine and the inspection result related to the pre-start inspection items of the construction machine, When the construction machine ID and the inspection result related to the pre-start inspection items are input, display a two-dimensional barcode including a predetermined code, the input construction machine ID, and the user information of the construction machine; A control program for executing the process.

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