Wide-area monitoring and control system, wide-area monitoring and control method, and wide-area monitoring and control program

Abstract

To provide a wide-area monitoring control system making it possible to efficiently perform work at a time of reviewing a monitoring control work which uses plural display terminals.SOLUTION: A wide-area monitoring control system 1A includes a monitoring controller 12A and a plurality of display terminals 11. The monitoring controller 12A includes a history storage unit 124 that stores history information in association with identification information, the history information including at least one of a manipulation history which is a history of manipulations, a control history which is a history of controls, and a monitoring history which is a history of pieces of monitoring information. The display terminal 11 includes: a display image storage unit 111 that stores a display image of the display terminal 11 of when the display terminal 11 displays monitoring information, and a display image of the display terminal 11 of when the display terminal 11 receives a manipulation; a history acquisition unit 112 that acquires the history information and the display image of the display terminal 11 corresponding to the identification information associated with the history information; and an output unit that outputs review information including the acquired history information and acquired display image.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a wide-area monitoring and control system, a wide-area monitoring and control method, and a wide-area monitoring and control program that monitor and control an object to be monitored and controlled. [Background technology]

[0002] In a wide-area monitoring and control system, where a monitoring and control device is used to monitor and control a plurality of facilities scattered over a wide area, multiple controllers each use a display terminal to perform monitoring and control tasks. In addition, in the monitoring and control tasks, a review is sometimes conducted to confirm or verify the content of the monitoring and control tasks that were performed in the past, with the aim of improving the monitoring and control tasks.

[0003] Patent Document 1 discloses an operation history collection system that associates monitoring histories and operation histories in a distributed computer control system that controls a plant with each other, stores them in chronological order, and displays the monitoring histories and operation histories. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-253476 Summary of the Invention [Problem to be solved by the invention]

[0005] When reviewing monitoring and control work using multiple display terminals, if information is collected from all of the multiple display terminals, the collected information will be a mixture of information useful for reviewing and information unnecessary for reviewing. The conventional technology disclosed in Patent Document 1 does not anticipate the use of multiple display terminals in monitoring and control work, so the person reviewing the work will be presented with a mixture of information useful for reviewing and information unnecessary for reviewing. In this case, the person reviewing the work will have to select only the information useful for reviewing from the presented information, making it difficult to improve the efficiency of the work when reviewing the work. Thus, the conventional technology has the problem of making it difficult to improve the efficiency of the work when reviewing monitoring and control work using multiple display terminals.

[0006] The present disclosure has been made in consideration of the above, and aims to provide a wide-area monitoring and control system that enables work efficiency improvement when reviewing monitoring and control operations using multiple display terminals. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the objectives, the wide-area monitoring and control system of the present disclosure includes a monitoring and control device that monitors and controls the monitoring and control object, and a plurality of display terminals each having a display function that displays information obtained from the monitoring and control device and an input function that accepts operations to input information. In the supervisory control work of the subject to supervisory control by the controller, the controller uses two or more display devices. The monitoring control device stores history information including at least one of an operation history, which is a history of operations received by the display terminal, a control history, which is a history of control performed by the monitoring control device on the object to be monitored and controlled, and a monitoring history, which is a history of monitoring information showing the state of the object to be monitored and controlled. , complex The display terminal includes a display image storage unit that stores a display image of the display terminal when the display terminal displays monitoring information and a display image of the display terminal when the display terminal accepts an operation, a history acquisition unit that acquires the history information and the display image of the display terminal corresponding to the identification information that is associated with the history information, and In response to a review request including a designation of a display terminal to be reviewed and a designation of a period to be reviewed,and an output unit that outputs review information including the acquired history information and the acquired display image. [Effects of the Invention]

[0008] The wide-area monitoring and control system according to the present disclosure has the effect of making it possible to improve the efficiency of work when reviewing monitoring and control work using multiple display terminals. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating a configuration example of a wide-area monitoring and control system according to a first embodiment. [Figure 2] 1 is a flowchart showing a procedure of a supervisory control process executed by the wide-area supervisory control system according to the first embodiment; [Figure 3] 1 is a flowchart showing a procedure of a review process executed by the wide-area monitoring and control system according to the first embodiment; [Figure 4] FIG. 10 is a diagram showing an example of review information displayed by the display terminal according to the first embodiment; [Figure 5] FIG. 10 is a diagram illustrating a configuration example of a wide-area monitoring and control system according to a second embodiment. [Figure 6] 10 is a flowchart showing a procedure of a review process executed by the wide-area monitoring and control system according to the second embodiment. [Figure 7] FIG. 10 is a diagram illustrating a configuration example of a wide-area monitoring and control system according to a third embodiment. [Figure 8] 10 is a flowchart showing a procedure of a supervisory control process executed by a wide-area supervisory control system according to a third embodiment. [Figure 9] 10 is a flowchart showing a procedure of a review process executed by the wide-area monitoring and control system according to the third embodiment. [Figure 10] FIG. 10 is a diagram illustrating a configuration example of a wide-area monitoring and control system according to a fourth embodiment. [Figure 11] 10 is a flowchart showing a procedure of a review process executed by the wide-area monitoring and control system according to the fourth embodiment. [Figure 12]FIG. 1 is a diagram illustrating an example of a hardware configuration of a monitoring and control device according to first to fourth embodiments. [Figure 13] FIG. 1 is a diagram showing a hardware configuration of a display terminal according to first to fourth embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0010] A wide-area monitoring and control system, a wide-area monitoring and control method, and a wide-area monitoring and control program according to embodiments will be described in detail below with reference to the accompanying drawings.

[0011] Embodiment 1 1 is a diagram showing an example of the configuration of a wide-area monitoring and control system 1A according to Embodiment 1. The wide-area monitoring and control system 1A includes a plurality of display terminals 11, a monitoring and control device 12A, and an object 13 to be monitored and controlled.

[0012] Each display terminal 11 provided in the wide-area monitoring and control system 1A is a human machine interface (HMI). Each display terminal 11 has a display function for displaying information acquired from the monitoring and control device 12A and an input function for accepting operations for inputting information. Each display terminal 11 is used by each of multiple controllers engaged in monitoring and control work. Each controller uses one or more display terminals 11 in the monitoring and control work. The number of display terminals 11 provided in the wide-area monitoring and control system 1A is, for example, 50. In the first embodiment, the number of display terminals 11 provided in the wide-area monitoring and control system 1A is not limited to 50 and is arbitrary.

[0013] The monitoring control device 12A is operated and managed, for example, by a business operator engaged in monitoring and control services. The monitoring control device 12A monitors and controls the monitoring and control target 13. The monitoring and control target 13 includes multiple pieces of equipment scattered over a wide area. Each of the multiple pieces of equipment is controlled by the monitoring and control device 12A. The monitoring and control device 12A acquires information indicating the status of each of the multiple pieces of equipment. In the following description, each of the multiple pieces of equipment included in the monitoring and control target 13 may be referred to as the monitoring and control target 13.

[0014] The monitoring and controlling device 12A is configured, for example, by one or more cloud servers. A cloud server is a server built in a cloud environment including computer resources provided by a cloud service platform. Note that the monitoring and controlling device 12A may be a server other than a cloud server, for example, it may be an on-premise server.

[0015] Each display terminal 11 is communicably connected to the monitoring control device 12A via a network, and transmits and receives information to and from the monitoring control device 12A. The network is, for example, a wide area network (WAN) such as the Internet, but may also be a local area network (LAN). The display terminals 11 included in the plurality of display terminals 11 are communicably connected to one another via the network, and transmit and receive information between the display terminals 11. The monitoring and control target 13 is communicably connected to the monitoring control device 12A via the network, and transmits and receives information between the monitoring control device 12A.

[0016] The display terminal 11 includes a monitoring control operation unit 110, a display image storage unit 111, a history acquisition unit 112, a history synthesis unit 113, and a history display unit 114. The display terminals 11 of the wide-area monitoring and control system 1A have the same configuration.

[0017] The display terminal 11 acquires monitoring information indicating the status of the monitoring control target 13 from the monitoring control device 12A. The monitoring control operation unit 110 displays the monitoring information acquired from the monitoring control device 12A. The monitoring control operation unit 110 outputs a display image, which is an image displayed by the monitoring control operation unit 110 when the display terminal 11 acquires the monitoring information, to the display image storage unit 111. The display image is stored in the display image storage unit 111. Such a display image may be either a still image or a video image.

[0018] The monitoring and control operation unit 110 also accepts an operation by a controller to input information. The display terminal 11 transmits operation information indicating the input information to the monitoring and control device 12A. The monitoring and control operation unit 110 accepts an operation to input information about the control of the monitoring and control object 13 and an operation to cause the display terminal 11 to transition between screens. A screen transition is, for example, a transition between a screen that displays monitoring information and a screen that accepts input about control to the monitoring and control device 12A. Screen transitions include transitions between screens that display monitoring information about different pieces of equipment and transitions between screens that accept input about different pieces of equipment.

[0019] The monitoring control operation unit 110 outputs a display image, which is an image displayed by the monitoring control operation unit 110 when the monitoring control operation unit 110 is operated, to the display image storage unit 111. The display image is stored in the display image storage unit 111. Such a display image may be either a still image or a moving image.

[0020] The display image storage unit 111 stores the display image of the monitoring control operation unit 110 when the monitoring control operation unit 110 displays monitoring information, and the display image of the monitoring control operation unit 110 when the monitoring control operation unit 110 accepts an operation. In other words, the display image storage unit 111 stores the display image of the display terminal 11 when the display terminal 11 displays monitoring information, and the display image of the display terminal 11 when the display terminal 11 accepts an operation. The display image is associated with time information indicating the time when the display on the display terminal 11 was performed.

[0021] The history acquisition unit 112 acquires history information from the monitoring control device 12A. The history information will be described later. The history acquisition unit 112 also acquires display images from the display image storage unit 111. The history acquisition unit 112 appropriately acquires, from the display image storage unit 111, display images when displaying monitoring information and display images when accepting operations.

[0022] The history synthesis unit 113 synthesizes the history information acquired by the history acquisition unit 112 with the display image acquired by the history acquisition unit 112. The history display unit 114 displays the history information and display image synthesized by the history synthesis unit 113. The history display unit 114 functions as an output unit that outputs review information including the history information acquired by the history acquisition unit 112 and the display image acquired by the history acquisition unit 112. The history display unit 114 also accepts a review request operation, which is a request for review processing.

[0023] The monitoring control device 12A includes an operation history creation unit 121, a control history creation unit 122, a monitoring history creation unit 123, and a history storage unit 124. The monitoring control device 12A transmits and receives information to and from each display terminal 11 in the wide-area monitoring control system 1A.

[0024] The monitoring control device 12A acquires operation information from the display terminal 11. The operation history creation unit 121 creates an operation history using the operation information acquired from the display terminal 11. The operation history is a history of operations accepted by the display terminal 11. The operation history creation unit 121 outputs the created operation history to the history storage unit 124. The operation history is stored in the history storage unit 124.

[0025] The operation history includes time information indicating the time the operation was performed, operation information indicating the content of the operation, and identification information indicating the display terminal 11 on which the operation was performed. The identification information is information used to identify each of the multiple display terminals 11 in the monitoring control device 12A. The operation history creation unit 121 recognizes the display terminal 11 that is the sender of the operation information, and includes in the operation history the identification information indicating the display terminal 11 on which the operation was performed. The identification information indicating the display terminal 11 on which the operation was performed may be created by the operation history creation unit 121, or may be acquired by the operation history creation unit 121 from the display terminal 11 together with the operation information.

[0026] The monitoring control device 12A acquires, from the display terminal 11, operation information when information about control of the monitoring control target 13 is input and operation information when an operation to cause a screen transition on the display terminal 11 is performed. If the operation information acquired from the display terminal 11 is operation information about control of the monitoring control target 13, the operation history creation unit 121 creates control information indicating the content of the control corresponding to the operation based on the operation information, and outputs the control information to the control history creation unit 122. If the operation information acquired from the display terminal 11 is operation information about a screen transition, the operation history creation unit 121 outputs screen transition information indicating the content of the screen transition to the monitoring history creation unit 123. In addition, the operation history creation unit 121 outputs identification information indicating the display terminal 11 on which the operation was performed to the control history creation unit 122.

[0027] When the control history creation unit 122 acquires control information from the operation history creation unit 121, it outputs the control information. The monitoring control device 12A transmits the control information output by the control history creation unit 122 to the monitoring and control object 13. The monitoring control device 12A controls the monitoring and control object 13 by transmitting the control information to the monitoring and control object 13. The control history creation unit 122 creates a control history using the control information acquired from the operation history creation unit 121. The control history is a history of control performed by the monitoring and control object 12A on the monitoring and control object 13. The control history creation unit 122 outputs the created control history to the history storage unit 124.

[0028] The control history is saved in the history saving unit 124. The control history includes time information indicating the time when the control was performed, control information indicating the content of the control, and identification information indicating the display terminal 11 on which the operation that caused the control was performed. The control history creating unit 122 includes the identification information acquired from the operation history creating unit 121 in the control history as identification information indicating the display terminal 11 on which the operation that caused the control was performed.

[0029] The monitoring control device 12A acquires monitoring information from the monitoring control object 13. The monitoring control device 12A monitors the monitoring control object 13 by acquiring the monitoring information from the monitoring control object 13. The monitoring history creation unit 123 outputs the monitoring information acquired from the monitoring control object 13 to the monitoring control operation unit 110 of the display terminal 11.

[0030] The monitoring history creation unit 123 creates a monitoring history using monitoring information acquired from the monitoring control target 13. The monitoring history is a history of monitoring information that indicates the state of the monitoring control target 13. The monitoring history creation unit 123 outputs the created monitoring history to the history storage unit 124. The monitoring history is stored in the history storage unit 124.

[0031] The monitoring history includes time information indicating the time the monitoring information was acquired, monitoring information indicating the state of the monitoring control target 13, and identification information of the display terminal 11 displaying the monitoring information. The monitoring history creation unit 123 recognizes the display terminal 11 displaying the monitoring information based on the screen transition information, and includes the identification information of the display terminal 11 displaying the monitoring information in the monitoring history. If the same monitoring information is displayed on two or more display terminals 11, the monitoring history includes the identification information of each of the two or more display terminals 11. The monitoring information includes failure information, which is information about a failure of the monitoring control target 13.

[0032] In this way, the monitoring control device 12A creates an operation history, a control history, and a monitoring history, and stores the operation history, the control history, and the monitoring history. In the first embodiment, reviewing refers to checking or verifying the content of at least one of the operation history, the control history, and the monitoring history.

[0033] The history storage unit 124 stores history information, which is information including at least one of an operation history, a control history, and a monitoring history, in the monitoring control device 12A, by linking the history information to identification information that can identify each of the multiple display terminals 11. When the monitoring control device 12A controls the monitored and controlled object 13 in accordance with an operation on the display terminal 11 and the monitoring control device 12A acquires monitoring information indicating a state change in accordance with the control, the history storage unit 124 stores history information in which the operation information, the control information, and the monitoring information are associated with each other. In this case, the identification information included in each of the operation history, the control history, and the monitoring history is linked to the history information. When a state change occurs in the monitored and controlled object 13 that is not due to control by the monitoring control device 12A and the monitoring control device 12A acquires monitoring information indicating the state change, the history storage unit 124 stores history information that does not include the operation history or the control history but includes the monitoring information. In this case, the identification information included in the monitoring information is linked to the history information. The monitoring control device 12A transmits the history information stored in the history storage unit 124 to the display terminal 11 in response to a request from the display terminal 11.

[0034] The history acquisition unit 112 of the display terminal 11 on which the lookback request operation has been performed acquires history information and a display image of the display terminal 11 corresponding to the identification information linked to the history information. If the identification information linked to the history information is identification information indicating the display terminal 11 on which the lookback request operation has been performed, the history acquisition unit 112 acquires the display image from the display image storage unit 111 in the display terminal 11 on which the lookback request operation has been performed. If the identification information linked to the history information is identification information indicating a display terminal 11 other than the display terminal 11 on which the lookback request operation has been performed, the history acquisition unit 112 requests transmission of a display image to the display terminal 11 indicated by the identification information. The history acquisition unit 112 acquires the display image from the display terminal 11 indicated by the identification information. If the identification information of each of two or more display terminals 11 is linked to the history information, the history acquisition unit 112 acquires a display image from each of the two or more display terminals 11.

[0035] The history synthesis unit 113 associates the history information with the display image based on the time information included in the history information and the time information associated with the display image, and synthesizes the history information with the display image. In this way, the history synthesis unit 113 creates retrospective information including the history information and the display image. The history display unit 114 displays the history information and the display image synthesized by the history synthesis unit 113, thereby outputting retrospective information including the acquired history information and the acquired display image.

[0036] Next, a description will be given of the monitoring and control process performed by the wide-area monitoring and control system 1A. Fig. 2 is a flowchart showing the procedure of the monitoring and control process performed by the wide-area monitoring and control system 1A according to the first embodiment.

[0037] The display terminal 11 waits for an air traffic controller to operate the display terminal 11. When the display terminal 11 is operated, in step S1, the display terminal 11 stores the display image in the display image storage unit 111. In step S2, the display terminal 11 transmits operation information to the monitoring control device 12A.

[0038] The monitoring control device 12A waits to receive operation information. In step S2, the operation information is transmitted from the display terminal 11, and the monitoring control device 12A receives the operation information, whereby the operation history creation unit 121 acquires the operation information. In step S3, the monitoring control device 12A creates an operation history using the operation history creation unit 121 and stores the created operation history in the history storage unit 124. The operation history creation unit 121 creates control information based on the operation information and outputs the control information to the control history creation unit 122.

[0039] In step S4, the monitoring control device 12A determines whether or not there is a state change from the currently monitored state due to control. For example, if the currently monitored state of the monitored and controlled object 13 is a power-on state and the control indicated in the control information is a control to turn the power on, there is no state change. On the other hand, if the currently monitored state of the monitored and controlled object 13 is a power-on state and the control indicated in the control information is a control to turn the power off, there is a state change.

[0040] If it is determined that there is a state change (step S4, Yes), the wide-area monitoring and control system 1A proceeds to step S5. On the other hand, if it is determined that there is no state change (step S4, No), the wide-area monitoring and control system 1A ends the operation according to the procedure shown in FIG.

[0041] In step S5, the monitoring control device 12A adds the control information to the control response waiting list, and transmits the control information to the monitored and controlled object 13. The control history creation unit 122 adds the control information to the control response waiting list via the monitoring history creation unit 123. In step S6, the monitoring control device 12A creates a control history using the control history creation unit 122, and stores the created control history in the history storage unit 124.

[0042] The monitoring control device 12A waits to receive monitoring information from the monitoring control object 13. When the monitoring control device 12A receives the monitoring information, the monitoring history creating unit 123 acquires the monitoring information from the monitoring control object 13 in step S7.

[0043] In step S8, the monitoring control device 12A determines whether a state change from the currently monitored state has occurred in the monitored and controlled object 13. For example, if the state of the currently monitored monitored and controlled object 13 is a power-on state and the state shown in the monitoring information is a power-off state, a state change has occurred. On the other hand, if the state of the currently monitored monitored and controlled object 13 is a power-on state and the state shown in the monitoring information is a power-on state, a state change has not occurred.

[0044] If it is determined that a state change has occurred (step S8, Yes), the wide-area monitoring and control system 1A proceeds to step S9. On the other hand, if it is determined that a state change has not occurred (step S8, No), the wide-area monitoring and control system 1A returns the procedure to step S7.

[0045] In step S9, the monitoring history creation unit 123 checks whether the monitoring information is included in the control response waiting. If the monitoring information is included in the control response waiting (step S9, Yes), the wide-area monitoring and control system 1A proceeds to step S10.

[0046] On the other hand, if the monitoring information is not included in the control response waiting (step S9, No), the monitoring control device 12A creates a monitoring history using the monitoring history creation unit 123. In step S11, the monitoring history creation unit 123 stores the created monitoring history in the history storage unit 124. The monitoring history is stored together with the operation history and the control history, linked to the identification information. After completing step S11, the wide-area monitoring control system 1A returns the procedure to step S7.

[0047] In step S10, the monitoring control device 12A deletes the monitoring information from the control response waiting list and saves the monitoring history. The monitoring control device 12A creates a monitoring history using the monitoring history creation unit 123 and saves the created monitoring history in the history saving unit 124. The monitoring history is saved together with the operation history and the control history, linked to the identification information.

[0048] The display terminal 11 waits to receive the monitoring information. When the display terminal 11 receives the monitoring information, in step S12, the display terminal 11 displays the monitoring information using the monitoring control operation unit 110 and saves the display image in the display image saving unit 111. With this, the wide-area monitoring and control system 1A ends the monitoring and control processing according to the procedure shown in FIG.

[0049] Next, a description will be given of the review process performed by the wide-area monitoring and control system 1A. Fig. 3 is a flowchart showing the procedure of the review process performed by the wide-area monitoring and control system 1A according to the first embodiment.

[0050] The history display unit 114 of the display terminal 11 waits for a review request from a controller. The review request in the first embodiment includes a specification of the display terminal 11 to be the subject of the review and a specification of the period to be the subject of the review. When the controller operates the history display unit 114 to issue a review request, the history display unit 114 outputs the review request to the history acquisition unit 112. In step S21, the history acquisition unit 112 acquires the review request.

[0051] In step S22, the history acquisition unit 112 acquires history information and a display image. The history acquisition unit 112 requests the monitoring control device 12A to transmit the history information stored in the history storage unit 124. The history acquisition unit 112 acquires the history information transmitted from the monitoring control device 12A. The history acquisition unit 112 extracts history information for a period specified in the review request from the acquired history information. The history acquisition unit 112 also acquires a display image from the display terminal 11 specified in the review request. The history acquisition unit 112 outputs the extracted history information and the acquired display image to the history synthesis unit 113.

[0052] The history information acquired by the history synthesis unit 113 is a collection of records that are history information saved at different times within the period specified in the review request. In step S23, the history synthesis unit 113 extracts one record from the acquired history information. Here, the history synthesis unit 113 rearranges the records in chronological order and extracts the records in order from oldest to newest.

[0053] In step S24, the history synthesis unit 113 determines whether the record extracted in step S23 is information linked to the display terminal 11 that is the target of the review. If the identification information linked to the record is identification information that indicates the display terminal 11 that is the target of the review, the record is determined to be information linked to the display terminal 11 that is the target of the review. On the other hand, if the identification information linked to the record is not identification information that indicates the display terminal 11 that is the target of the review, the record is determined to not be information linked to the display terminal 11 that is the target of the review.

[0054] If the record is information linked to the display terminal 11 that is the target of the review (step S24, Yes), in step S25, the history synthesis unit 113 adds the record to the review information to be presented in the review. After completing step S25, the wide-area monitoring and control system 1A proceeds to step S26. On the other hand, if the record is not information linked to the display terminal 11 that is the target of the review (step S24, No), the wide-area monitoring and control system 1A skips step S25 and proceeds to step S26.

[0055] In step S26, the history synthesis unit 113 determines whether the record extracted in step S23 is the last record in the time series. That is, the history synthesis unit 113 determines whether the processes of steps S24 and S25 have been executed for all records of the history information acquired by the history synthesis unit 113. If the record is not the last record in the time series (step S26, No), the wide-area monitoring and control system 1A returns the procedure to step S23. The wide-area monitoring and control system 1A repeats the processes from step S23 to step S26 for the next record.

[0056] On the other hand, if the record is the last record in the time series (step S26, Yes), the history synthesis unit 113 outputs the retrospective information in which the display screen is synthesized with the record added to the retrospective information to the history display unit 114. In step S27, the history display unit 114 displays the retrospective information. With the above, the wide-area monitoring and control system 1A ends the retrospective processing according to the procedure shown in Fig. 3. Note that in the above procedure, the history synthesis unit 113 extracts the records in order from the oldest record, but the order in which the history synthesis unit 113 extracts the records is arbitrary.

[0057] Fig. 4 is a diagram showing an example of retrospective information displayed by the display terminal 11 according to the first embodiment. Fig. 4 shows an example of retrospective information displayed on the screen by the history display unit 114. A list of records among the retrospective information is displayed on the left side of the screen in Fig. 4. When a record is selected from the list of records, a bitmap, which is a display image included in the retrospective information, is displayed on the right side of the screen in Fig. 4.

[0058] In the example shown in Fig. 4, the monitoring and control target 13 is a facility installed on an expressway. Fig. 4 shows a record indicating that one of the facilities installed at an interchange (IC) on the expressway is malfunctioning, and a display image on the display terminal 11. In Fig. 4, "display terminal 1," "display terminal 2," and "display terminal 3" are each display terminals 11 identified by identification information linked to the record shown in Fig. 4.

[0059] In this way, the history display unit 114 displays review information including the history information and display image related to the display terminal 11 specified in the review request. The controller can check the history information and display image related to the display terminal 11 specified in the review request from the review information displayed on the display terminal 11.

[0060] According to the first embodiment, the wide-area monitoring and control system 1A narrows down the display images stored in each of the multiple display terminals 11 to those related to the display terminal 11 specified in the review request, based on the identification information. This allows the wide-area monitoring and control system 1A to narrow down and present display images that are useful for review. The controller does not need to manually thin out display images that are not necessary for review. As a result, the wide-area monitoring and control system 1A has the effect of making it possible to improve the efficiency of work when reviewing monitoring and control work using multiple display terminals 11.

[0061] Embodiment 2 Fig. 5 is a diagram showing an example of the configuration of a wide-area monitoring and control system 1B according to a second embodiment. The wide-area monitoring and control system 1B includes a plurality of display terminals 11, a monitoring and control device 12B, and a monitoring and control target 13. The monitoring and control device 12B includes a business information storage unit 125 in addition to the same configuration as the monitoring and control device 12A shown in Fig. 1. In the second embodiment, the same components as those in the first embodiment above are denoted by the same reference numerals, and the following mainly describes the configuration that differs from the first embodiment.

[0062] The task information storage unit 125 stores task information, which is information about tasks performed using the display terminal 11. The task information is created, for example, by a business operator that performs monitoring and control tasks, and stored in the task information storage unit 125. The task information includes information indicating the controller who performed the task, information indicating the display terminal 11 used by the controller, information indicating the content of the task, and information indicating the period during which the task was performed. The information indicating the display terminal 11 may be identification information.

[0063] The history acquisition unit 112 of the display terminal 11 on which the review request operation was performed acquires business information from the monitoring control device 12B. Based on the business information, the history acquisition unit 112 acquires the display image of the display terminal 11 used for the business and history information linked to the identification information of the display terminal 11 used for the business. As a result, the history synthesis unit 113 creates review information that narrows down the information related to the monitoring and control of the display terminal 11 used for the business that is the target of the review.

[0064] Next, a description will be given of the processing executed by the wide-area monitoring and control system 1B. The wide-area monitoring and control system 1B executes the processing of monitoring and control in accordance with the same procedure as that shown in FIG.

[0065] FIG. 6 is a flowchart illustrating a procedure of a review process executed by the wide-area monitoring and control system 1B according to the second embodiment.

[0066] The history display unit 114 of the display terminal 11 waits for a review request from a controller. The review request in the second embodiment includes a specification of the task to be reviewed. When the controller operates the history display unit 114 to issue a review request, the history display unit 114 outputs the review request to the history acquisition unit 112. In step S31, the history acquisition unit 112 acquires the review request.

[0067] In step S32, the history acquisition unit 112 acquires history information, task information, and a display image. The history acquisition unit 112 requests the monitoring control device 12B to transmit the history information stored in the history storage unit 124 and the task information stored in the task information storage unit 125. The history acquisition unit 112 acquires the history information and task information transmitted from the monitoring control device 12B. The history acquisition unit 112 extracts task information for the task specified in the review request from the acquired task information.

[0068] The history acquisition unit 112 extracts history information for the period during which the business was performed from the acquired history information based on information indicating the period during which the business was performed from the extracted business information. The history acquisition unit 112 acquires a display image from the display terminal 11 used for the business based on information on the display terminal 11 used for the business from the extracted business information. The history acquisition unit 112 outputs the extracted history information and the acquired display image to the history synthesis unit 113.

[0069] The processing from step S33 to step S37 is the same as the processing from step S23 to step S27 shown in Fig. 3. After completing step S37, the wide-area monitoring and control system 1B ends the review processing according to the procedure shown in Fig. 6.

[0070] According to the second embodiment, the wide-area monitoring and control system 1B narrows down the display images related to the task specified in the review request from among the display images stored in each of the multiple display terminals 11, based on the identification information. This allows the wide-area monitoring and control system 1B to present a narrowed down display image related to the specified task. As a result, the wide-area monitoring and control system 1B has the effect of making it possible to improve the efficiency of work when reviewing monitoring and control tasks using multiple display terminals 11.

[0071] Embodiment 3 Fig. 7 is a diagram showing an example of the configuration of a wide-area monitoring and control system 1C according to a third embodiment. The wide-area monitoring and control system 1C includes a plurality of display terminals 11, a monitoring and control device 12C, a monitoring and control target 13, a plurality of web terminals 14, and a web server device 15. The monitoring and control device 12C has a configuration similar to that of the monitoring and control device 12B shown in Fig. 5. In the third embodiment, the same components as those in the first or second embodiment are denoted by the same reference numerals, and the following description will mainly focus on the configuration that differs from the first or second embodiment.

[0072] Each web terminal 14 included in the wide-area monitoring and control system 1C is a device equipped with a web browser. Each web terminal 14 is an HMI. Each web terminal 14 has a display function for displaying information acquired from the monitoring and control device 12C and an input function for accepting operations to input information. Each web terminal 14 is used by each of multiple controllers. The number of web terminals 14 included in the wide-area monitoring and control system 1C is, for example, 200. In the third embodiment, the number of web terminals 14 included in the wide-area monitoring and control system 1C is not limited to 200 and is arbitrary.

[0073] Each web terminal 14 is communicatively connected to web server device 15 via the network and transmits and receives information to and from web server device 15. Web server device 15 is communicatively connected to monitoring control device 12C via the network and transmits and receives information to and from monitoring control device 12C. Each display terminal 11 is communicatively connected to web server device 15 via the network and transmits and receives information to and from web server device 15.

[0074] Web server device 15 transmits the monitoring information received from monitoring control device 12C to web terminal 14, and transmits operation information, which is information about operations on monitoring control device 12C accepted by web terminal 14, to monitoring control device 12C.

[0075] Web server device 15 is configured, for example, by one or more cloud servers. A cloud server is a server built in a cloud environment that includes computer resources provided by a cloud service platform. Note that web server device 15 may be a server other than a cloud server, for example, it may be an on-premise server.

[0076] Web server device 15 includes web content display unit 151 and web content storage unit 152. Web server device 15 acquires monitoring information indicating the status of monitoring control target 13 from monitoring control device 12C. Web content display unit 151 transmits the monitoring information acquired from monitoring control device 12C to web terminal 14, and displays the monitoring information on web terminal 14. Web content display unit 151 acquires operation information from web terminal 14 and transmits the operation information to monitoring control device 12C.

[0077] Web content display unit 151 outputs the web content that web terminal 14 displays when web terminal 14 acquires monitoring information to web content storage unit 152. Web content display unit 151 outputs the web content that web terminal 14 displays when web terminal 14 is operated to web content storage unit 152. Web content storage unit 152 stores the web content of web terminal 14 when displaying monitoring information and the web content of web terminal 14 when accepting an operation.

[0078] The monitoring history creation unit 123 outputs the monitoring information acquired from the monitoring control target 13 to the web content display unit 151 of the web server device 15. The web content display unit 151 outputs the operation information acquired from the web terminal 14 to the operation history creation unit 121.

[0079] Next, a description will be given of the supervisory control process performed by the wide-area supervisory control system 1C. Fig. 8 is a flowchart showing the procedure of the supervisory control process performed by the wide-area supervisory control system 1C according to the third embodiment.

[0080] Web content display unit 151 waits for a controller to operate web terminal 14. When web terminal 14 is operated, in step S41, web content display unit 151 stores the web content in web content storage unit 152. In step S42, web content display unit 151 transmits operation information to monitoring control device 12C.

[0081] Monitoring control device 12C waits to receive operation information. In step S42, the operation information is transmitted from web server device 15, and monitoring control device 12C receives the operation information, whereby operation history creation unit 121 acquires the operation information. In step S43, monitoring control device 12C creates an operation history using operation history creation unit 121 and stores the created operation history in history storage unit 124. Operation history creation unit 121 creates control information based on the operation information and outputs the control information to control history creation unit 122.

[0082] The processes from step S44 to step S49 and step S51 are the same as the processes from step S4 to step S9 and step S11 shown in Fig. 2. After completing step S49, the wide-area monitoring and control system 1C advances the procedure to step S50.

[0083] In step S50, the monitoring control device 12C deletes the monitoring information from the control response waiting list and saves the monitoring history. The monitoring control device 12C creates a monitoring history using the monitoring history creation unit 123 and saves the created monitoring history in the history saving unit 124. The monitoring history is saved together with the operation history and the control history, linked to the identification information.

[0084] Display terminal 11 waits to receive monitoring information. Web server device 15 waits to receive monitoring information. When display terminal 11 receives the monitoring information and web server device 15 receives the monitoring information, in step S52, wide-area monitoring control system 1C displays the monitoring information and saves the display image and web content. Monitoring control operation unit 110 of display terminal 11 displays the monitoring information. Monitoring control operation unit 110 saves the display image in display image saving unit 111. Web content display unit 151 transmits the monitoring information received from monitoring control device 12C to web terminal 14. Web terminal 14 displays the monitoring information. Web content display unit 151 saves the web content in web content saving unit 152. With the above, wide-area monitoring control system 1C ends the monitoring control processing according to the procedure shown in FIG. 8.

[0085] Next, a review process performed by the wide-area monitoring and control system 1C will be described below. Fig. 9 is a flowchart showing the procedure of the review process performed by the wide-area monitoring and control system 1C according to the third embodiment.

[0086] The history display unit 114 of the display terminal 11 waits for a review request from a controller. The review request in the third embodiment includes a specification of the task to be reviewed. When the controller operates the history display unit 114 to issue a review request, the history display unit 114 outputs the review request to the history acquisition unit 112. In step S61, the history acquisition unit 112 acquires the review request.

[0087] In step S62, the history acquisition unit 112 acquires history information, task information, display images, and web content. The history acquisition unit 112 requests the monitoring control device 12C to transmit the history information stored in the history storage unit 124 and the task information stored in the task information storage unit 125. The history acquisition unit 112 acquires the history information and task information transmitted from the monitoring control device 12C. The history acquisition unit 112 extracts task information for the task specified in the review request from the acquired task information.

[0088] History acquisition unit 112 requests web server device 15 to transmit the web content of web terminal 14 that was used in the business specified in the review request. Web server device 15 transmits the requested web content from the web content stored in web content storage unit 152 to display terminal 11. History acquisition unit 112 acquires the web content transmitted from web server device 15.

[0089] History acquisition unit 112 extracts history information for the period during which the business was performed from the acquired history information based on information indicating the period during which the business was performed from the extracted business information. History acquisition unit 112 acquires a display image from display terminal 11 used for the business based on information on display terminal 11 used for the business from the extracted business information. History acquisition unit 112 outputs the extracted history information, the acquired display image, and the acquired web content to history synthesis unit 113.

[0090] The processing from step S63 to step S66 is the same as the processing from step S23 to step S26 shown in Fig. 3. In step S66, if the record is the last record in chronological order (Yes in step S66), the history synthesis unit 113 outputs to the history display unit 114 the review information in which the display screen and the web content are synthesized with the record added to the review information.

[0091] In step S67, the history display unit 114 displays the review information. With the above, the wide-area monitoring control system 1C ends the review processing according to the procedure shown in FIG.

[0092] According to the third embodiment, the wide-area monitoring and control system 1C narrows down display images related to the task specified in the review request from among the display images stored in each of the multiple display terminals 11, based on the identification information. This allows the wide-area monitoring and control system 1C to achieve the effect of improving work efficiency when reviewing monitoring and control tasks using multiple display terminals 11. Furthermore, the wide-area monitoring and control system 1C includes web content related to the task specified in the review request in the review information. This allows the wide-area monitoring and control system 1C to present information useful for reviewing monitoring and control tasks.

[0093] Embodiment 4 FIG. 10 is a diagram showing an example of the configuration of a wide-area monitoring and control system 1D according to a fourth embodiment. The wide-area monitoring and control system 1D includes a plurality of display terminals 11D, a monitoring and control device 12D, a monitoring and control target 13, a plurality of web terminals 14, a web server device 15, a camera server device 16, and a camera 17. Each display terminal 11D of the wide-area monitoring and control system 1D includes an audio storage unit 115 and a microphone 116 in addition to the same configuration as the display terminal 11 shown in FIG. 1. The monitoring and control device 12D has the same configuration as the monitoring and control device 12B shown in FIG. 5. In the fourth embodiment, the same components as those in the first to third embodiments are denoted by the same reference numerals, and the following description will mainly focus on the configuration that differs from the first to third embodiments.

[0094] Microphone 116 captures audio from a location where work is being performed using display terminal 11D, such as a control room. Audio storage unit 115 records the audio captured by microphone 116 and stores the recorded data. As a result, audio storage unit 115 stores audio data acquired by recording how work is being performed using display terminal 11D.

[0095] Camera 17 photographs a location where work is being performed using display terminal 11D, for example, a control room. Camera 17 outputs the photographed image, which is an image captured by photographing, to camera server device 16. Camera server device 16 includes a photographed image storage unit 161. Photographed image storage unit 161 stores the photographed image. As a result, camera server device 16 stores the photographed image acquired by photographing the state where work is being performed using display terminal 11D in photographed image storage unit 161. Each display terminal 11D is communicably connected to camera server device 16 via a network, and transmits and receives information to and from camera server device 16.

[0096] The camera server device 16 is configured, for example, by one or more cloud servers. A cloud server is a server built in a cloud environment that includes computer resources provided by a cloud service platform. Note that the camera server device 16 may be a server other than a cloud server, for example, an on-premise server.

[0097] History acquisition unit 112 of display terminal 11D on which the operation of the review request has been performed acquires the audio data stored in audio storage unit 115. History acquisition unit 112 of display terminal 11D on which the operation of the review request has been performed requests camera server device 16 to transmit the captured images. History acquisition unit 112 acquires the captured images transmitted from camera server device 16.

[0098] Next, a description will be given of the processing executed by the wide-area monitoring and control system 1D. The wide-area monitoring and control system 1D executes the processing of monitoring and control in accordance with the same procedure as that shown in FIG.

[0099] FIG. 11 is a flowchart showing the procedure of the review process executed by the wide-area monitoring and control system 1D according to the fourth embodiment.

[0100] The history display unit 114 of the display terminal 11D waits for a review request from a controller. The review request in the fourth embodiment includes a specification of the task to be reviewed. When the controller operates the history display unit 114 to issue a review request, the history display unit 114 outputs the review request to the history acquisition unit 112. In step S71, the history acquisition unit 112 acquires the review request.

[0101] In step S72, the history acquisition unit 112 acquires history information, task information, display images, web content, captured images, and audio data. The history acquisition unit 112 requests the monitoring control device 12D to transmit the history information stored in the history storage unit 124 and the task information stored in the task information storage unit 125. The history acquisition unit 112 acquires the history information and task information transmitted from the monitoring control device 12D. The history acquisition unit 112 extracts task information for the task specified in the review request from the acquired task information. The history acquisition unit 112 also acquires web content from the web server device 15, as in the third embodiment. The history acquisition unit 112 extracts history information for the period during which the task was performed, as in the third embodiment. The history acquisition unit 112 also acquires display images from the display terminal 11D used for the task, as in the third embodiment.

[0102] History acquisition unit 112 acquires audio data from audio storage unit 115 of display terminal 11D used for business. History acquisition unit 112 acquires captured images of display terminal 11D used for business from camera server device 16. History acquisition unit 112 outputs the extracted history information, the acquired display images, the acquired web content, the acquired captured images, and the acquired audio data to history synthesis unit 113.

[0103] The processing from step S73 to step S76 is the same as the processing from step S23 to step S26 shown in Fig. 3. In step S76, if the record is the last record in chronological order (step S76, Yes), the history synthesis unit 113 outputs to the history display unit 114 the retrospective information in which the display screen, web content, captured image, and audio data are synthesized with the record added to the retrospective information.

[0104] In step S77, the history display unit 114 displays the review information. In addition, the history display unit 114 plays back the audio of the audio data included in the review information in accordance with an operation on the history display unit 114. With the above, the wide-area monitoring and control system 1D ends the review processing according to the procedure shown in FIG.

[0105] According to the fourth embodiment, the wide-area monitoring and control system 1D narrows down the display images related to the task specified in the review request from among the display images stored in each of the multiple display terminals 11D, based on the identification information. This allows the wide-area monitoring and control system 1D to achieve an effect of improving the efficiency of work when reviewing the monitoring and control tasks using the multiple display terminals 11D.

[0106] Furthermore, the wide-area monitoring and control system 1D acquires audio data while the controllers are performing their duties, and includes in the review information audio data recording conversations between the controllers while they are performing their duties. The wide-area monitoring and control system 1D acquires photographed images of the controllers performing their duties, and includes in the review information the photographed images capturing the controllers performing their duties. This allows the wide-area monitoring and control system 1D to present information useful for reviewing the monitoring and control duties.

[0107] Next, the hardware configuration of the monitoring control devices 12A, 12B, 12C, and 12D according to the first to fourth embodiments will be described. Fig. 12 is a diagram showing an example of the hardware configuration of the monitoring control devices 12A, 12B, 12C, and 12D according to the first to fourth embodiments. The monitoring control devices 12A, 12B, 12C, and 12D are realized by a computer system including a processing circuit 50 and a communication device 51. The processing circuit 50 includes a processor 52 and a memory 53. The processing circuit 50 is a circuit on which the processor 52 executes software.

[0108] The processing units of the monitoring control devices 12A, 12B, 12C, and 12D, that is, the operation history creation unit 121, the control history creation unit 122, and the monitoring history creation unit 123, are realized by software, firmware, or a combination of software and firmware. The software or firmware is written as a program and stored in the memory 53.

[0109] In the processing circuit 50, the processor 52 reads and executes programs stored in the memory 53, thereby realizing the functions of the processing units of the monitoring and control devices 12A, 12B, 12C, and 12D. That is, the processing circuit 50 includes the memory 53 for storing programs that result in the processing of the monitoring and control devices 12A, 12B, 12C, and 12D. The programs stored in the memory 53 can also be said to cause a computer to execute the procedures and methods of the monitoring and control devices 12A, 12B, 12C, and 12D. The programs stored in the memory 53 cause a computer to execute the procedures and methods of the monitoring and control devices 12A, 12B, 12C, and 12D of the wide-area monitoring and control systems 1A, 1B, 1C, and 1D, and constitute a wide-area monitoring and control program.

[0110] The processor 52 is a CPU (Central Processing Unit), a processing unit, an arithmetic unit, a microprocessor, a microcomputer, a processor, or a DSP (Digital Signal Processor). The memory 53 is a non-volatile or volatile semiconductor memory such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Memory), or an EEPROM (Electrically Erasable Programmable Read Only Memory).

[0111] The program stored in memory 53 may be provided in a form written on a storage medium such as a CD (Compact Disc)-ROM or a DVD (Digital Versatile Disc)-ROM, or may be provided via a communication line.

[0112] The communication device 51 communicates with devices external to the monitoring and control devices 12A, 12B, 12C, and 12D. The history storage unit 124 and the business information storage unit 125 are realized using the memory 53.

[0113] Next, a description will be given of the hardware configuration of the display terminals 11 and 11D according to embodiments 1 to 4. Fig. 13 is a diagram showing the hardware configuration of the display terminals 11 and 11D according to embodiments 1 to 4. The display terminals 11 and 11D are realized by a computer system including a processing circuit 60, a communication device 61, an input device 64, and a display device 65.

[0114] The processing circuit 60 includes a processor 62 and a memory 63. The processing circuit 60 is a circuit on which the processor 62 executes software. The processor 62 and the memory 63 are assumed to be similar to the processor 52 and the memory 53 shown in FIG. 12. The functions of the history acquisition unit 112 and the history synthesis unit 113, which are processing units of the display terminals 11 and 11D, are realized by the processor 62 reading and executing programs stored in the memory 63. The programs stored in the memory 63 can also be said to cause a computer to execute the procedures and methods of the display terminals 11 and 11D. The programs stored in the memory 63 are programs that cause a computer to execute the procedures and methods of the display terminals 11 and 11D of the wide-area monitoring and control systems 1A, 1B, 1C, and 1D, and constitute a wide-area monitoring and control program.

[0115] The input device 64 is an input device operated by a controller. The input device 64 includes, for example, a keyboard, a mouse, a keypad, or a touch panel. The function of accepting operations in the monitoring control operation unit 110 and the history display unit 114 is realized by the input device 64. The display device 65 is, for example, an LCD (Liquid Crystal Display) or an organic EL (Electro-Luminescence) display. The display function in the monitoring control operation unit 110 and the history display unit 114 is realized by the display device 65. The function of outputting audio in the history display unit 114 of the display terminal 11D is realized by an audio output device such as a speaker. The audio output device is not shown in the figure.

[0116] Web server device 15 is realized by a hardware configuration similar to that shown in Fig. 12. Web terminal 14 is realized by a hardware configuration similar to that shown in Fig. 13.

[0117] The configurations shown in the above embodiments are examples of the contents of the present disclosure. The configurations of each embodiment can be combined with other known technologies. The configurations of each embodiment can also be combined as appropriate. Part of the configuration of each embodiment can be omitted or modified without departing from the gist of the present disclosure.

[0118] Various aspects of the present disclosure are summarized below as appendices.

[0119] (Appendix 1) a monitoring and control device that monitors and controls an object to be monitored and controlled; a plurality of display terminals each having a display function for displaying information acquired from the monitoring control device and an input function for receiving an operation for inputting information; The monitoring and control device includes: a history storage unit that stores history information including at least one of an operation history, which is a history of operations received by the display terminal, a control history, which is a history of control performed by the monitoring control device on the monitoring control target, and a monitoring history, which is a history of monitoring information showing the state of the monitoring control target, in association with identification information used to identify each of the plurality of display terminals in the monitoring control device; The display terminal a display image storage unit that stores a display image of the display terminal when the display terminal displays the monitoring information and a display image of the display terminal when the display terminal accepts an operation; a history acquisition unit that acquires the history information and the display image of the display terminal that corresponds to the identification information linked to the history information; and an output unit that outputs retrospective information including the acquired history information and the acquired display image. (Appendix 2) The monitoring and control device includes: A business information storage unit for storing business information that is information about business performed using the display terminal is further provided, The wide-area monitoring and control system described in Appendix 1 is characterized in that the history acquisition unit acquires the display image of the display terminal used for the business and the history information linked to the identification information of the display terminal used for the business based on the business information. (Appendix 3) The system further includes a web server device that transmits the monitoring information received from the monitoring control device to a web terminal, and transmits operation information, which is information about operations on the monitoring control device accepted by the web terminal, to the monitoring control device; The web server device a web content storage unit that stores web content of the web terminal when the monitoring information is displayed and web content of the web terminal when an operation is accepted, the history acquisition unit acquires the web content of the web server device used for the business based on the business information; The wide-area monitoring and control system according to claim 2, wherein the output unit outputs the retrospective information including the acquired web content. (Appendix 4) The display terminal a voice storage unit for storing voice data obtained by recording how the business is being performed using the display terminal; the history acquisition unit acquires the voice data while the task is being performed based on the task information; The wide-area monitoring and control system according to claim 2 or 3, wherein the output unit outputs the retrospective information including the acquired voice data. (Appendix 5) The system further includes a camera server device that stores images captured by using the display terminal to capture images of how the business is being performed, the history acquisition unit acquires the captured images while the work is being performed based on the work information; The wide-area monitoring and control system according to any one of appendices 2 to 4, wherein the output unit outputs the retrospective information including the acquired photographed image. (Appendix 6) a step of storing, by the display terminal, an image displayed on the display terminal when the display terminal receives an operation to input information to the monitoring control device; a step in which the monitoring control device stores history information including an operation history, which is a history of operations received by the display terminal, a control history, which is a history of control performed by the monitoring control device on the object to be monitored and controlled, and a monitoring history, which is a history of monitoring information showing the state of the object to be monitored and controlled, by linking the history information to identification information that enables the plurality of display terminals to be distinguished from one another; a step of storing a display image of the display terminal when the display terminal displays the monitoring information; a step of the display terminal acquiring the history information and the display image of the display terminal corresponding to the identification information linked to the history information; a step of outputting, by the display terminal, review information including the acquired history information and the acquired display image; A wide-area monitoring and control method comprising: (Appendix 7) The method further includes a step of storing task information, which is information about tasks performed using the display terminal, by the monitoring and control device; The wide-area monitoring and control method described in Appendix 6, characterized in that in the step in which the display terminal acquires the history information and the display image, the display image of the display terminal used for the business and the history information linked to the identification information of the display terminal used for the business are acquired based on the business information. (Appendix 8) a step in which a web server device stores web content of the web terminal when the web terminal accepts an operation for the monitoring control device; a step in which the web server device transmits operation information, which is information about an operation accepted by the web terminal, to the monitoring control device; a step in which the web server device transmits the monitoring information received from the monitoring control device to the web terminal; and storing web content of the web terminal when the web terminal displays the monitoring information; In the step of acquiring the history information and the display image by the display terminal, the web content of the web server device used for the business is acquired based on the business information; A wide-area monitoring and control method as described in Appendix 7, characterized in that in the step of the display terminal outputting the retrospective information, the display terminal outputs the retrospective information including the acquired web content. (Appendix 9) The method further includes a step of storing voice data acquired by recording voice in an environment where the display terminal is present while the business is being performed using the display terminal; In the step of acquiring the history information and the display image by the display terminal, the voice data when the task is being performed is acquired based on the task information; A wide-area monitoring and control method as described in Appendix 7 or 8, characterized in that in the step of the display terminal outputting the retrospective information, the display terminal outputs the retrospective information including the acquired audio data. (Appendix 10) The method further includes a step of saving a captured image obtained by capturing an image of an environment in which the display terminal is present while the business is being performed using the display terminal; In the step of acquiring the history information and the display image by the display terminal, the captured image is acquired while the business is being performed based on the business information; A wide-area monitoring and control method described in any one of Appendices 7 to 9, characterized in that in the step in which the display terminal acquires the history information and the display image, the retrospective information including the acquired captured image is output. (Appendix 11) storing a display image of the display terminal when the display terminal accepts an operation to input information to the monitoring control device; a step in which the monitoring control device stores history information including an operation history, which is a history of operations received by the display terminal, a control history, which is a history of control performed by the monitoring control device on the object to be monitored and controlled, and a monitoring history, which is a history of monitoring information showing the state of the object to be monitored and controlled, by linking the history information to identification information that enables the plurality of display terminals to be distinguished from one another; a step of saving a display image of the display terminal when displaying the monitoring information; acquiring the history information and the display image of the display terminal corresponding to the identification information linked to the history information; outputting review information including the acquired history information and the acquired display image; A wide-area monitoring and control program characterized by causing a computer to execute the above. [Explanation of symbols]

[0120] 1A, 1B, 1C, 1D Wide area monitoring and control system, 11, 11D Display terminal, 12A, 12B, 12C, 12D Monitoring and control device, 13 Monitoring and control target, 14 Web terminal, 15 Web server device, 16 Camera server device, 17 Camera, 50, 60 Processing circuit, 51, 61 Communication device, 52, 62 Processor, 53, 63 Memory, 64 Input device, 65 Display device, 110 Monitoring and control operation unit, 111 Display image storage unit, 112 History acquisition unit, 113 History synthesis unit, 114 History display unit, 115 Audio storage unit, 116 Microphone, 121 Operation history creation unit, 122 Control history creation unit, 123 Monitoring history creation unit, 124 History storage unit, 125 Business information storage unit, 151 Web content display unit, 152 Web content storage unit, 161 Captured image storage section.

Claims

1. a monitoring and control device that monitors and controls an object to be monitored and controlled; a plurality of display terminals each having a display function for displaying information acquired from the monitoring control device and an input function for receiving an operation for inputting information; In the supervisory control work of the supervisory control object by the supervisory control officer, the supervisory control officer uses two or more of the display terminals, The monitoring and control device includes: a history storage unit that stores history information including at least one of an operation history, which is a history of operations received by the display terminal, a control history, which is a history of control performed by the monitoring control device on the object to be monitored and controlled, and a monitoring history, which is a history of monitoring information showing the state of the object to be monitored and controlled, in association with identification information used to identify each of the plurality of display terminals; The display terminal a display image storage unit that stores a display image of the display terminal when the display terminal displays the monitoring information and a display image of the display terminal when the display terminal accepts an operation; a history acquisition unit that acquires the history information and the display image of the display terminal that corresponds to the identification information linked to the history information; A wide-area monitoring and control system characterized by comprising an output unit that receives a review request that includes a specification of the display terminal to be reviewed and a specification of the period to be reviewed, and outputs review information that includes the acquired history information and the acquired display image.

2. The display terminal a history synthesis unit that synthesizes the history information acquired by the history acquisition unit and the display image acquired by the history acquisition unit, 2. The wide-area monitoring and control system according to claim 1, wherein the output unit outputs the history information and the display image combined by the history combining unit as the retrospective information.

3. The monitoring and control device includes: A business information storage unit for storing business information that is information about business performed using the display terminal is further provided, The wide-area monitoring and control system described in claim 1 or 2, characterized in that the history acquisition unit acquires the display image of the display terminal used for the business and the history information linked to the identification information of the display terminal used for the business based on the business information.

4. The system further includes a web server device that transmits the monitoring information received from the monitoring control device to a web terminal, and transmits operation information, which is information about operations on the monitoring control device accepted by the web terminal, to the monitoring control device; The web server device a web content storage unit that stores web content of the web terminal when the monitoring information is displayed and web content of the web terminal when an operation is accepted, the history acquisition unit acquires the web content of the web server device used for the business based on the business information; The wide-area monitoring and control system according to claim 3 , wherein the output unit outputs the review information including the acquired web content.

5. The display terminal a voice storage unit for storing voice data obtained by recording how the business is being performed using the display terminal; the history acquisition unit acquires the voice data while the task is being performed based on the task information; The wide-area monitoring and control system according to claim 3 , wherein the output unit outputs the review information including the acquired voice data.

6. The system further includes a camera server device that stores images captured by using the display terminal to capture images of how the business is being performed, the history acquisition unit acquires the captured images while the work is being performed based on the work information; The wide-area monitoring and control system according to claim 3 , wherein the output unit outputs the retrospective information including the acquired photographed image.

7. A wide-area monitoring and control method for monitoring and controlling a monitoring and control target by a wide-area monitoring and control system comprising a monitoring and control device and a plurality of display terminals each having a display function for displaying information acquired from the monitoring and control device and an input function for receiving operations for inputting information, In the supervisory control work of the supervisory control object by the supervisory control officer, the supervisory control officer uses two or more of the display terminals, a step of storing, by the display terminal, a display image of the display terminal when the display terminal accepts an operation to input information to the monitoring control device; a step in which the monitoring control device stores history information including at least one of an operation history, which is a history of operations received by the display terminal, a control history, which is a history of control performed by the monitoring control device on the object to be monitored and controlled, and a monitoring history, which is a history of monitoring information showing the state of the object to be monitored and controlled, by linking the history information to identification information used to identify each of the plurality of display terminals; a step of storing a display image of the display terminal when the display terminal displays the monitoring information; a step of the display terminal acquiring the history information and the display image of the display terminal corresponding to the identification information linked to the history information; receiving a review request including a designation of the display terminal to be reviewed and a designation of a period to be reviewed, and outputting review information including the acquired history information and the acquired display image by the display terminal; A wide-area monitoring and control method comprising:

8. The method further includes a step of storing task information, which is information about tasks performed using the display terminal, by the monitoring and control device; The wide-area monitoring and control method described in claim 7, characterized in that in the step in which the display terminal acquires the history information and the display image, the display image of the display terminal used for the business and the history information linked to the identification information of the display terminal used for the business are acquired based on the business information.

9. a step in which a web server device stores web content of the web terminal when the web terminal accepts an operation for the monitoring control device; a step in which the web server device transmits operation information, which is information about an operation accepted by the web terminal, to the monitoring control device; a step in which the web server device transmits the monitoring information received from the monitoring control device to the web terminal; and storing web content of the web terminal when the web terminal displays the monitoring information; In the step of acquiring the history information and the display image by the display terminal, the web content of the web server device used for the business is acquired based on the business information; 9. The wide-area monitoring control method according to claim 8, wherein in the step of outputting the retrospective information by the display terminal, the display terminal outputs the retrospective information including the acquired web content.

10. The method further includes a step of storing voice data acquired by recording voice in an environment where the display terminal is present while the business is being performed using the display terminal; In the step of acquiring the history information and the display image by the display terminal, the voice data when the task is being performed is acquired based on the task information; The wide-area monitoring and control method according to claim 8 or 9, characterized in that in the step of outputting the retrospective information by the display terminal, the display terminal outputs the retrospective information including the acquired voice data.

11. The method further includes a step of saving a captured image obtained by capturing an image of an environment in which the display terminal is present while the business is being performed using the display terminal; In the step of acquiring the history information and the display image by the display terminal, the captured image is acquired while the business is being performed based on the business information; The wide-area monitoring and control method according to claim 8 or 9, characterized in that in the step in which the display terminal acquires the history information and the display image, the retrospective information including the acquired photographed image is output.

12. a step of storing, by the display terminal, an image displayed on the display terminal when the display terminal receives an operation to input information to the monitoring control device; a step in which the monitoring control device stores history information including at least one of an operation history, which is a history of operations received by the display terminal, a control history, which is a history of control performed by the monitoring control device on a monitoring control target, and a monitoring history, which is a history of monitoring information showing the state of the monitoring control target, by linking the history information to identification information used to identify each of the plurality of display terminals; a step of storing a display image of the display terminal when the display terminal displays the monitoring information; a step of the display terminal acquiring the history information and the display image of the display terminal corresponding to the identification information linked to the history information; receiving a review request including a designation of the display terminal to be reviewed and a designation of a period to be reviewed, and outputting review information including the acquired history information and the acquired display image by the display terminal; on the computer, A wide-area monitoring and control program characterized in that the controller uses two or more of the display terminals in the monitoring and control work of the object to be monitored and controlled by the controller.

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