Remote Operation System

Abstract

Provided is a remote operation system configured to enable remotely resolving an error generated in a work device by: transmitting information of an error generated in any one of a plurality of work devices to any one of a plurality of remote monitoring devices; and transmitting, from the remote monitoring device having received the information of the error transmitted, information of an operation for resolving the error to the work device where the error was generated. Regarding all errors generated in the plurality of work devices in a predetermined period of time, a management device calculates a total of waiting time between generation of each error and a first operation for resolving the error, and a display device displays the total of waiting time calculated by the management device.

Description

[Technical Field]

[0001] The present disclosure relates to a remote operation system that can resolve an error that occurs in a work device by remote operation from a remote monitoring device. [Background technology]

[0002] Conventionally, there is known a remote operation system that can resolve an error by remote operation from an operation remote monitoring device when an error occurs in a work device that constitutes a work line (see, for example, Patent Document 1 listed below). In such a remote operation system, it is possible to install multiple remote monitoring devices so that multiple errors that occur simultaneously by multiple workers can be resolved simultaneously. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-200654 Summary of the Invention

[0004] However, even if multiple workers are able to simultaneously resolve multiple errors that occur at the same time, as described above, there are cases where appropriate work efficiency cannot be maintained depending on the skills of the workers performing the work. In such cases, it is possible to consider replacing workers or increasing the number of workers. However, such decisions have traditionally been subjective, based on the intuition and experience of the manager (the person who manages the staffing system for remote monitoring devices), and there has been a problem in that they are not always appropriate decisions.

[0005] Therefore, the present disclosure aims to provide a remote operation system that can accurately assign or select workers to perform remote operations to resolve errors that occur in work devices, without relying on the experience or intuition of an administrator.

[0006] The remote operation system disclosed herein is configured to remotely resolve an error that has occurred in one of a plurality of maintenance devices by transmitting information about an error that has occurred in one of a plurality of maintenance devices to one of a plurality of remote monitoring devices, and the remote monitoring device that has received the error information transmits information about an operation to resolve the error to the maintenance device in which the error occurred, and the remote operation system is configured to remotely resolve an error that has occurred in one of a plurality of maintenance devices by transmitting information about an operation to resolve the error from the time when each of the errors occurred to the time when the first operation to resolve each of the errors is performed for all of the errors that have occurred in the plurality of maintenance devices within a certain period of time. The actual time required A management device that calculates the total waiting time of a display device that displays the total waiting time calculated by the management device; Equipped with:

[0007] According to the present disclosure, the allocation or selection of workers who will perform remote operations to resolve errors that have occurred in a work device can be done accurately without relying on the experience or intuition of the manager. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic configuration diagram of a remote control system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a side view of a main part of a working device constituting a remote operation system according to an embodiment of the present disclosure. [Figure 3] FIG. 3 is a perspective view showing a parts feeder of a working device constituting a remote operation system according to an embodiment of the present disclosure, together with a mounting head and a board recognition camera. [Figure 4] FIG. 4 is a block diagram showing a control system of a remote operation system according to an embodiment of the present disclosure. [Figure 5] FIG. 5 is a diagram illustrating an example of master data created by a management device included in a remote operation system according to an embodiment of the present disclosure. [Figure 6A] FIG. 6A is a diagram illustrating an example of recovery information data displayed by the display device of the remote operation system according to the embodiment of the present disclosure. [Figure 6B]FIG. 6B is a diagram illustrating an example of recovery information data for each worker displayed by the display device of the remote operation system according to the embodiment of the present disclosure. [Figure 6C] FIG. 6C is a diagram illustrating an example of recovery information data for each error type of a worker displayed on the display device of the remote operation system according to the embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. Fig. 1 is a schematic configuration diagram of a remote control system 1 according to an embodiment of the present disclosure.

[0010] The remote operation system 1 is configured to include a plurality of operation devices 2, a management device 3, a plurality of remote monitoring devices 4, and a display device 5. In this embodiment, each operation device 2 is a component mounting device that mounts components on a board KB. The plurality of operation devices 2 are arranged in series to form a work line 2L.

[0011] Fig. 2 is a side view of a main portion of a working device constituting a remote operation system according to an embodiment of the present disclosure. In Fig. 2, each working device 2 includes a base 11, a transfer conveyor 12, a parts feeder 13, a head moving mechanism 14, a mounting head 15, a board recognition camera 16, and a component recognition camera 17. The transfer conveyor 12 extends in the left-right direction (X-axis direction) on the base 11, receives a board KB sent from upstream, and positions it at a predetermined working position.

[0012] In Fig. 2, the parts feeder 13 is a tape feeder. The parts feeder 13 uses a built-in sprocket 13S (see also Fig. 3) to pull out the carrier tape CT wound around the reel RL and transport it in the front-to-rear direction (Y-axis direction). In this way, the parts feeder 13 supplies the components BH to a component supply position 13K provided at the end of the transport conveyor 12. The head moving mechanism 14 is, for example, an XY gantry mechanism, and moves the mounting head 15 in a horizontal plane.

[0013] FIG. 3 is a perspective view showing a part feeder of a working device constituting a remote operation system according to an embodiment of the present disclosure, together with a mounting head and a board recognition camera. In FIGS. 2 and 3, the mounting head 15 includes multiple nozzles 15N extending downward. The mounting head 15 can raise and lower each nozzle 15N and rotate each nozzle 15N in the vertical direction (Z-axis direction). The mounting head 15 can also generate a vacuum suction force at the bottom end of each nozzle 15N. When the mounting head 15 picks up a component BH from the part feeder 13, the nozzle 15N is lowered above the component supply position 13K, generating a vacuum suction force at the bottom end of the nozzle 15N.

[0014] 2 and 3, the board recognition camera 16 is attached to the mounting head 15 with its imaging optical axis facing downward. The board recognition camera 16 moves in a horizontal plane together with the mounting head 15, and captures an image from above of the board KB that has been positioned at the work position by the transfer conveyor 12.

[0015] 2, component recognition camera 17 is attached to base 11 with its imaging optical axis facing upward. When mounting head 15, which has picked up component BH, passes above component recognition camera 17 and moves toward board KB, component recognition camera 17 captures an image of component BH from below.

[0016] The operating device 2 is equipped with an operating device control unit 18 (FIGS. 2 and 4). The operating device control unit 18 controls the operation of each unit of the operating device 2. Specifically, the operating device control unit 18 operates the transport conveyor 12 to transport the board KB and position it at the operating position, and operates each part feeder 13 to supply components BH to the component supply position 13K. The operating device control unit 18 also operates the head movement mechanism 14 to move the mounting head 15 in a horizontal plane. The operating device control unit 18 also raises, lowers, and rotates each nozzle 15N provided on the mounting head 15, generating a suction force at the bottom end of each nozzle 15N to pick up the components BH supplied by the part feeder 13. The operating device control unit 18 also performs image recognition based on image data obtained by the imaging operation of the board recognition camera 16, and has the component recognition camera 17 capture an image of the components BH picked up by the mounting head 15 and adsorbed to the nozzles 15N, thereby recognizing the components BH.

[0017] When each of the work devices 2 constituting the work line 2L performs a component mounting operation to mount components BH on a board KB, the transport conveyor 12 first receives and transports the board KB sent from upstream, and positions the board KB at the work position. Once the board KB is positioned at the work position, the head movement mechanism 14 moves the mounting head 15 above the board KB. As a result, the board recognition camera 16 captures an image of the board KB, and the work device control unit 18 recognizes the board KB.

[0018] When the working device control unit 18 recognizes the board KB, the head movement mechanism 14 moves the mounting head 15 to above the parts feeder 13. After moving above the parts feeder 13, the mounting head 15 picks up the parts BH supplied by the parts feeder 13 by suctioning them onto each of the multiple nozzles 15N.

[0019] After the mounting head 15 picks up the component BH, the head movement mechanism 14 moves the mounting head 15 so that the component BH picked up by the mounting head 15 passes above the component recognition camera 17. The component recognition camera 17 captures an image of the component BH as it passes above. The work device control unit 18 recognizes the component BH based on the image captured by the component recognition camera 17.

[0020] Once the work device control unit 18 recognizes the component BH, the head movement mechanism 14 moves the placement head 15 to above the board KB. The placement head 15 places the picked-up component BH at the target placement coordinates set on the board KB. When the placement head 15 places the component BH at the target placement coordinates, position correction is performed based on the recognition results of the component BH performed by the component recognition camera 17 and the recognition results of the board KB performed by the board recognition camera 16.

[0021] By repeating this series of operations of the mounting head 15, the components BH to be mounted on the board KB are mounted on the board KB. The transfer conveyor 12 then carries the board KB downstream of the working device 2. This completes the component mounting operation for one board KB.

[0022] The operating device 2 has a self-detection function that allows it to detect the occurrence of any error during the component mounting work described above. When the self-detection function detects the occurrence of an error, it transmits information about the error that has occurred (error information) to the management device 3. The management device 3 then transmits (transfers) information about the error that has occurred in one of the multiple operating devices 2 to one of the multiple remote monitoring devices 4. The error information transmitted from the operating device 2 includes, for example, an image of the location where the error has occurred captured by the board recognition camera 16.

[0023] The remote monitoring device 4 functions as a so-called remote terminal. The remote monitoring device 4 is configured by, for example, a personal computer. The remote monitoring device 4 may be connected to the management device 3 by wire or wirelessly.

[0024] Fig. 4 is a block diagram showing a control system of a remote operation system according to an embodiment of the present disclosure. In Fig. 4, a remote monitoring device 4 includes a remote operation control unit 21, an input unit 22 connected to the remote operation control unit 21, and an output unit 23. When the remote monitoring device 4 is configured from a personal computer, the keyboard unit corresponds to the input unit 22, and the monitor unit corresponds to the output unit 23 (Fig. 1).

[0025] 4, the remote operation control unit 21 of the remote monitoring device 4 communicates (exchanges information) with the management device 3. Then, the remote operation control unit 21 displays the error information (contents of the error) transmitted from the management device 3 on the output unit 23. This allows the worker performing the work on the remote monitoring device 4 to check the content of the error that has occurred on the work device 2, and to input an operation (error resolution operation) for resolving the error that has occurred from the input unit 22.

[0026] Information on the error resolution operation input by the worker via the input unit 22 is transmitted from the remote operation control unit 21 to the management device 3. When the management device 3 receives information on the error from the remote monitoring device 4, it transmits (transfers) the information on the error resolution operation to the work device 2 in which the error occurred.

[0027] The maintenance device 2, which has received information about the error resolution operation from the management device 3, operates based on the received error resolution operation. As a result, the maintenance device 2 attempts to resolve the error that has occurred. If the error is resolved as a result, the maintenance device 2 transmits information (error resolution information) indicating that the error has been resolved to the management device 3. The management device 3 transmits (transfers) the error resolution information to the remote monitoring device 4. When the remote operation control unit 21 of the remote monitoring device 4 receives the error resolution information from the management device 3, it displays a notification on the output unit 23 indicating that the error has been resolved. This allows the worker to confirm that the error has been resolved by the operation that was performed, and the error resolution work is completed.

[0028] On the other hand, if the maintenance device 2 attempts to resolve the error based on the information on the error resolution operation received from the management device 3 and the error is not resolved, the maintenance device 2 transmits information indicating that the error has not been resolved (error unresolved information) to the management device 3. The management device 3 transmits (transfers) the error unresolved information to the remote monitoring device 4. When the remote operation control unit 21 of the remote monitoring device 4 receives the error unresolved information from the management device 3, the remote operation control unit 21 displays a notice indicating that the error has not been resolved on the output unit 23. This allows the worker to confirm that the error has not been resolved by the operation performed, and allows the worker to transmit new information on the error resolution operation to the management device 3. Furthermore, if the worker determines that the error cannot be resolved by remote operation and gives up on resolving the error by remote operation, the worker can transmit a notice to that effect to the management device 3 and terminate the error resolution operation. In this case, the worker will take measures such as contacting an operator at the work site and giving instructions to manually resolve the error.

[0029] FIG. 5 is a diagram illustrating an example of master data created by a management device included in a remote operation system according to an embodiment of the present disclosure. As shown in FIG. 4, the management device 3 includes a master data creation unit 31, a calculation unit 32, and a display control unit 33. The master data creation unit 31 creates master data as shown in FIG. 5 based on error information received from the maintenance device 2 and error resolution operation information received from the remote monitoring device 4. As shown in FIG. 5, the master data includes the error number, responsible party, error type, registration time, start time, end time, and recovery success / failure. The master data can be created as data for a certain period of time set by specifying a date and time period. FIG. 5 illustrates an example of master data summarizing error information that occurred between 11:00 and 16:00 on a certain day.

[0030] The "number" in the master data item shown in Fig. 5 is the error number. The error number is expressed as a consecutive number assigned in the order in which the error occurred in one of the multiple maintenance devices 2 and was sent to the management device 3.

[0031] The "responsible" item in the master data shown in FIG. 5 indicates the worker in charge of the error resolution operation, and is represented by an identification number assigned to each worker. In the example shown in FIG. 5, three workers working on three remote monitoring devices 4 are designated "1," "2," and "3." Note that this assumes a one-to-one relationship between each remote monitoring device 4 and the worker performing the work from each remote monitoring device 4. Note that when multiple workers share one remote monitoring device 4, it is preferable that the worker input their own identifier via the input unit 22 before starting work on the remote monitoring device 4, so that the management device 3 can grasp the correspondence between the remote monitoring device 4 and the worker.

[0032] The "Type" item in the master data shown in Figure 5 indicates the type of error. Here, the error type is either a pickup error (A), a board recognition error (B), or a nozzle tip abnormality (C). A "pickup error" is an error that occurs when the nozzle 15N is unable to pick up the component BH that it should pick up from the parts feeder 13, or when the nozzle 15N picks up the component BH but drops it. A "board recognition error" is an error that occurs when the board KB is positioned at the work position by the transfer conveyor 12 and then the board recognition camera 16 attempts to recognize the board KB but is unable to recognize it properly. A "nozzle tip abnormality" is an error that occurs when the tip of the nozzle 15N is bent.

[0033] The "Registration time" in the master data item shown in Figure 5 is the time when the management device 3 received error information from the maintenance device and registered the error information. The "Start time" is the time when the management device 3 received the first error resolution operation for the error information from the remote monitoring device 4 to which it sent the error information. The "End time" is the time when the management device 3 sent error resolution information to the remote monitoring device 4 to which it sent the error information, or the time when it received information from the remote monitoring device 4 that the management device 3 had given up on the error resolution operation via remote operation. The "+" mark in the "Recovery" column is an identifier indicating that the error was resolved (recovered) by remote operation. The "+" mark in the "Non-recovery" column is an identifier indicating that the error could not be resolved (recovered) by remote operation.

[0034] The calculation unit 32 performs calculations based on the data created in the master data by the master data creation unit 31, and writes the results into the "operation time" and "waiting time" in the master data. Here, the "operation time" is the time during which the worker performs the error resolution operation from the remote monitoring device 4, and corresponds to the time between the start time and the end time. The "waiting time" is the time required from the registration of the error information until the start of the error resolution operation, and corresponds to the time between the registration time and the start time.

[0035] FIG. 6A is a diagram illustrating an example of recovery information data displayed on a display device of a remote operation system according to an embodiment of the present disclosure. The calculation unit 32 creates the "recovery information data" shown in FIG. 6A based on all errors that occurred within a set period of time, based on the master data. The recovery information data shown in FIG. 6A includes the following fields: "total number of errors," "number of recovered errors," "number of unrecoverable errors," "total operation time," and "total waiting time." Here, the "total number of errors" is the total number of errors that occurred within the period of time, and corresponds to the maximum number of "numbers" in the master data of FIG. 5. The "number of recovered errors" is the total number of errors that were resolved by remote operation, and corresponds to the total number of errors marked with a "+" in the "recovery" field in the master data of FIG. 5. The "number of unrecoverable errors" is the total number of errors that could not be resolved by remote operation, and corresponds to the total number of errors marked with a "+" in the "unrecoverable" field in the master data of FIG. 5.

[0036] The "total operation time" in the recovery information data shown in FIG. 6A is the sum of the "operation times" in the master data of FIG. 5. Therefore, "9:45:00 (9 hours, 45 minutes, 0 seconds)", which is the sum of the operation times in the master data of FIG. 5, corresponds to the "total operation time". The "total waiting time" in the recovery information data shown in FIG. 6A is the sum of the "waiting times" in the master data of FIG. 5. Therefore, "1:15:00 (1 hour, 15 minutes, 0 seconds)", which is the sum of the "waiting times" in the master data of FIG. 5, corresponds to the "total waiting time".

[0037] 4, a display operation unit 5S is provided on the display device 5. When a person (administrator) who manages the staffing system for the remote monitoring device 4 performs a predetermined operation on the display operation unit 5S, the display device 5 can display the "master data" shown in FIG. 5 as well as the "recovery information data" shown in FIG. 6A.

[0038] As described above, the remote operation system 1 in this embodiment is configured to transmit information about an error that has occurred in one of a plurality of maintenance devices 2 to one of a plurality of remote monitoring devices 4, and then transmit information about an operation for resolving the error (error resolving operation) from the remote monitoring device 4 that has received the error information to the maintenance device 2 in which the error occurred, thereby enabling the error that has occurred in the maintenance device 2 to be resolved remotely. The management device 3 then calculates, for all errors that have occurred in the plurality of maintenance devices 2 within a certain period of time, the total waiting time from the occurrence of each error to the time the first error resolving operation is performed for each error. The display device 5 displays the total waiting time calculated by the management device 3.

[0039] The "total waiting time" in the recovery information data (FIG. 6A) displayed on the display device 5 can be considered a parameter that measures whether the workers who performed the error resolution work (the three workers with identification numbers "1," "2," and "3") achieved the expected results (resolved the errors) for the errors that occurred in the multiple operation devices 2 that make up the operation line 2L. Specifically, if the total value of the waiting time within a certain period of time is shorter than a predetermined reference time, it can be determined that the number and capabilities of the workers who performed the error resolution work within that period of time were sufficient.

[0040] On the other hand, if the "total waiting time" value is greater than the reference time, it can be determined that the number or ability of the workers working to resolve the error was insufficient. For example, in the example of Figure 5, assume that the reference time was set to 1 hour 30 minutes. In this case, the total actual waiting time was shorter than that, at 1 hour 15 minutes 0 seconds. Therefore, it can be determined that the number and ability of three workers is sufficient, and that the current staffing system at the remote monitoring device 4 can be maintained.

[0041] On the other hand, if the reference time had been set to one hour, the total actual waiting time would have been longer. Therefore, it can be determined that the three workers are insufficient in terms of numbers or capabilities, and that the current staffing system for the remote monitoring device 4 needs to be changed. Therefore, the manager who assigns or selects the workers who will perform remote operations to resolve errors that have occurred in the operation device 2 can accurately assign or select the workers without relying on his or her own experience or intuition (i.e., objectively).

[0042] 6B is a diagram showing an example of recovery information data for each worker displayed on the display device of the remote operation system according to an embodiment of the present disclosure. The calculation unit 32 creates the "recovery information data for each worker" shown in FIG. 6B based on all errors that occurred within a set period, based on the master data of FIG. 5. The recovery information data for each worker shown in FIG. 6B displays the contents of each item, "total number of errors," "number of recovered errors," "number of unrecovered errors," "total operation time," and "operation time / number of cases," for each of the responsible workers "1," "2," and "3."

[0043] Here, the "total number of errors" in the author-specific recovery information data in Figure 6B is calculated for each worker based on the master data in Figure 5, and is the total number of error resolution processes performed by each worker. The "number of recovered errors" is calculated for each worker based on the master data in Figure 5, and is the total number of errors that were recovered from. The "number of unrecoverable errors" is calculated for each worker based on the master data in Figure 5, and is the total number of errors that could not be recovered from. The "total operation time" is calculated for each worker based on the master data in Figure 5, and is the total "wearing time." The "operation time / number of errors" is calculated for each worker based on the master data in Figure 5, and is the operation time per error, i.e., the average operation time required to resolve one error.

[0044] As described above, in the remote operation system 1 according to the present embodiment, the management device 3 calculates the average operation time required to resolve one error for each worker who performed an error resolution operation within a set period of time on any of the multiple remote monitoring devices 4. Then, the display device 5 displays the average operation time calculated by the management device 3 for each worker.

[0045] By performing a predetermined operation on the display operation unit 5S, the manager can display the "recovery information data by worker" shown in Fig. 6B on the display device 5. Therefore, by referring to the "recovery information data by worker" shown in Fig. 6B, the manager can know the work ability of each worker who worked on error resolution operations during the period in question, and can evaluate the work of each worker.

[0046] 6C is a diagram showing an example of recovery information data for each error type of worker displayed on the display device of the remote operation system according to an embodiment of the present disclosure. The calculation unit 32 creates the "recovery information data for each error type of worker" shown in FIG. 6C based on all errors that occurred within a set period of time, based on the master data of FIG. 5. The recovery information data for each error type of worker shown in FIG. 6C is calculated by further subdividing the average operation time for each worker in the "recovery information data for each worker" of FIG. 6B according to the type of error.

[0047] As described above, in the remote operation system 1 of this embodiment, the management device 3 calculates the average operation time required to resolve one error for each error type (subdivided according to the error type) for each worker who performed an error resolution operation on any of the multiple remote monitoring devices 4 within a set period. Then, the display device 5 displays the average operation time for each worker calculated by the management device 3 after subdividing according to the error type.

[0048] By performing a predetermined operation on the display operation unit 5S, the manager can display the "recovery information data for each worker's error type" shown in Fig. 6C on the display device 5. Therefore, by referring to the "recovery information data for each worker's error type" shown in Fig. 6C, the manager can know the work ability for each error type of each worker who performed error resolution operations during the period in question, and can evaluate the work of each worker, including their strengths and weaknesses for each error type.

[0049] As described above, the remote operation system 1 according to the present embodiment is configured to transmit information about an error that has occurred in one of a plurality of maintenance devices 2 to one of a plurality of remote monitoring devices 4, and then transmit information about an operation (error resolution operation) for resolving the error to the maintenance device 2 in which the error occurred, thereby enabling the error that has occurred in one of the plurality of maintenance devices 2 to be resolved remotely. The management device 3 then calculates the total waiting time, from the occurrence of each of all errors that have occurred in the plurality of maintenance devices 2 within a certain period of time, until the first operation for resolving each of the errors is performed. The display device 5 displays the total waiting time calculated by the management device 3. Therefore, a manager who assigns or selects workers to perform remote operations to resolve errors that have occurred in the maintenance devices 2 can accurately assign or select workers without relying on their own experience or intuition (i.e., objectively), thereby improving the productivity of the production line.

[0050] While the embodiments of the present disclosure have been described above, the present disclosure is not limited to those described above and various modifications are possible. For example, in the above-described embodiments, a plurality of working apparatuses 2 constitute a work line 2L, but the working apparatuses 2 to which the present disclosure is applied do not necessarily have to constitute a work line 2L. Also, in the above-described embodiments, the working apparatuses 2 are component mounting apparatuses that mount components BH on the board KB that is the work target, but the working apparatuses 2 to which the present disclosure is applied are not limited to component mounting apparatuses. [Industrial Applicability]

[0051] To provide a remote operation system that can accurately allocate or select workers who perform remote operation to resolve errors that occur in a work device without relying on the experience or intuition of a manager. [Explanation of symbols]

[0052] 1 Remote Operation System 2. Work equipment 3 Management device 4 Remote monitoring equipment 5 Display device

Claims

1. A remote operation system configured to transmit information about an error occurring in any one of a plurality of operating devices to any one of a plurality of remote monitoring devices, and transmit information about an operation for eliminating the error from the remote monitoring device that has received the information about the error to the operating device in which the error has occurred, thereby enabling the error occurring in any one of the plurality of operating devices to be remotely eliminated, a management device that calculates a total of actual waiting times required from the occurrence of each of all errors that have occurred in the plurality of maintenance devices within a certain period of time until a first operation is performed to resolve each of the all errors; a display device that displays the total waiting time calculated by the management device; A remote operation system.

2. the management device calculates an average operation time required for each worker who performed an operation to resolve one of the errors on any of the plurality of remote monitoring devices during the period; The remote operation system according to claim 1 , wherein the display device displays the average operation time for each worker calculated by the management device.

3. The management device calculates the average operation time for each worker by subdividing the average operation time for each worker according to the type of the error, The remote operation system according to claim 2 , wherein the display device displays the average operation time for each worker, which is calculated by the management device by subdividing the error according to the type of the error.

Images