JP2007266685A - Image recording system and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To monitor operation contents performed at a plurality of operation terminals that an information system has without installing any monitoring cameras, and to efficiently analyze the situation of an object to be monitored when a trouble or the like occurs and the operation content of an operator. <P>SOLUTION: An image recording system has an image storage terminal 10 that inputs a video signal for monitoring the operation terminal 5 provided in the information system 4 for storing the signal as image data, and an image storing server 20 that receives the image data from the image storage terminal 10 for display. The image storage terminal 10 has a function for performing the code conversion of the inputted video signal to create an image data file, creating management information related to the image data file, writing the image data to which the management information is added into a storage device 18, and reading the image data stored in the storage device 18 according to a request from the image storage server 20 for transmitting the data to the image storage server 20. The image storage server 20 has a function for requesting the transmission of the image data to the image storage terminal 10 by the operation of the operator, adding the management information used as the file of the image storage server 20 to the image data transmitted form the image storage terminal 10, and editing a screen reproduced by using the stored image data. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for storing history data of operations performed using a human machine interface device (hereinafter referred to as an HMI device), and in particular, an image recording system capable of efficiently analyzing a power system accident or the like. And program.

  Conventionally, in an information system such as a monitoring control system, an operator inputs an operation command from a monitor of an HMI device and operates a controlled object through the information system. At this time, if any accident or event (hereinafter referred to as an accident) occurs in the information system itself or the monitoring target managed by the information system, the status of the monitoring target before and after the occurrence and the operator's operation command contents after the occurrence It may be necessary to check the history retroactively.

  For example, in the power system monitoring and control system, the status of the monitoring target such as the system telemeter, the open / close state of the equipment, the presence / absence of relay operation, etc. is saved as recording data at regular intervals, and the input contents to the HMI device are saved as operation history data When an accident or the like occurs, the accident is analyzed using these recorded data and operation history data (hereinafter referred to as log data together).

As an accident analysis method, a monitoring camera was installed in the vicinity of each HMI device, a video signal from the monitoring camera was recorded on a video recorder, and this video was played back by the HMI device. There is also a technique of analyzing the operation content (see, for example, Patent Document 1).
JP-A-8-138318

  The conventional method of analyzing based on log data reproduces the situation in saved time increments. Therefore, when an accident occurs, for example, in order to faithfully reproduce which screens are displayed in what order and when, and what operation the operator performed for what situation, all accident cases are assumed in advance. Log data must be defined in advance, which is very cumbersome and prone to leakage. Moreover, it takes a lot of labor to analyze an accident while following the log data in time series.

  On the other hand, the method of recording a monitor image by installing a monitoring camera in the vicinity of each HMI device is a direct method in terms of reproducing the operation contents of the HMI device, and the analysis method based on the log data described above. Although there are advantages, the surveillance camera must be installed in the vicinity of the HMI device, which may hinder the operation of the operator.

  The present invention has been made in view of such circumstances, and it is possible to monitor the contents of operations performed at a plurality of operation terminals of the information system without installing a monitoring camera, and to reduce the amount of log data. It is an object of the present invention to provide an image recording system and a program that can efficiently analyze the situation of an object to be monitored and the operation contents of an operator when an accident occurs.

  In order to achieve the above object, an image recording system of the present invention includes an image storage terminal that inputs a video signal for monitoring an operation terminal provided in an information system and stores it as image data, and from the image storage terminal to the image An image storage server for receiving and displaying data, wherein the image storage terminal is a video signal input means for inputting the video signal, and an encoding means for transcoding the input video signal to create an image data file. Index management means for creating management information in association with the image data file, file management means for writing image data to which management information is added by the index management means to a storage device, or reading from the storage device, and the image Reads image data stored in the storage device in response to a request from the storage server Request data transmission means for transmitting to the image storage server, wherein the image storage server makes an image data transfer request to the image storage terminal by an operator's operation, and the image storage terminal Request data receiving means for transferring image data transmitted from the file management means, index management means for adding management information as a file of the image storage server to the image data, and reproduction using the stored image data And a playback screen control means for editing the screen to be played.

  The image recording system of the present invention is provided for each operation terminal having a monitor, and inputs an image signal of the monitor and stores it as image data, and reproduces the image data stored in the image storage unit. An image reproduction unit that performs image data transfer request information including reproduction time zones before and after the event occurrence time and identification information of an image storage unit that stores image data related to the event type for each event type. A means for saving, an image transfer request means for outputting image data transfer request information corresponding to the event type based on the input event type, and the image saving unit sent in response to the image transfer request Image reproduction means for inputting image data files and reproducing them in time order, wherein the image storage unit inputs video signals of the monitor. Means for transcoding the input video signal to create an image data file in predetermined time units, means for creating management information including at least a start time and an end time in association with the image data file, and the image Means for determining whether or not to respond to the image data transfer request by inputting the image data transfer request information output from the reproduction unit, and if it is determined to respond, refer to the management information to start time or end Means for transmitting an image data file whose time is included in the reproduction time zone to the image reproduction unit.

  Furthermore, the program of the present invention is provided for each operation terminal having a monitor, and receives an image signal of the monitor and stores it as image data, and an image for reproducing the image data stored in the image storage unit A program for an image recording system having a playback unit, wherein the program for the image playback unit includes a playback time zone before and after an event occurrence time for each event type and an image storage unit that stores image data related to the event type. Processing for saving image data transfer request information including identification information, processing for executing an image transfer request by outputting image data transfer request information corresponding to the event type based on the input event type, and the image Input the image data file sent from the image storage unit in response to the transfer request and play it in order of time The program for the image storage unit performs code conversion on the input video signal of the monitor to create an image data file in a predetermined time unit, and at least a start time associated with the image data file. A process of creating management information including the end time, a process of inputting image data transfer request information output from the image reproduction unit, and determining whether to respond to the image data transfer request; When the determination is made, the management information is referred to and a process of transmitting an image data file whose start time or end time is included in the reproduction time zone to the image reproduction unit is performed.

  According to the present invention, it is possible to monitor operation contents performed at a plurality of operation terminals of the information system without installing a monitoring camera. Further, it is possible to efficiently analyze the status of the monitoring target and the operation contents of the operator when an accident or the like occurs.

  Hereinafter, image recording systems and programs according to first to fifth embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
(Constitution)
FIG. 1 is a functional block diagram showing the configuration of the image recording system according to the first embodiment of the present invention. As shown in FIG. 1, the image recording system includes an information system 4, an image storage terminal 10 that is one or a plurality of image storage units, an image storage server 20 that is an image playback unit, and a communication network that connects them. Hub device 3.

  Each of the one or more image storage terminals 10 includes a video signal input means 11 for inputting a video signal from an HMI controller 7 such as a personal computer constituting the HMI device 5 which is an operation terminal provided in the information system 4, and an input. An encoding unit 12 that encodes the converted video signal and converts it into an image data file in a predetermined time unit; a terminal-side index management unit 13 that creates index information for each image data file created by the encoding unit 12; A terminal-side index management information file 19 for storing the index information, a terminal-side storage device 18 such as an HDD for storing the image data file, a terminal-side file management means 14 for performing writing and reading processing of the image data file, Image data file sent from the image storage server 20 Transfer request receiving means 15 for receiving a transfer request for a message, request data transmitting means 16 for transferring an image data file to the image storage server 20 in response to the transfer request, and communication control on the terminal side for executing communication control with the network And means 17. Here, each means 12-17 is comprised so that the function is realizable with the software of computer.

  The image storage server 20 is sent from the image storage terminal 10, server-side communication control means 22 that executes communication control with the network, image transfer request means 21 that transmits an image transfer request to the image storage terminal 10, and the image storage terminal 10. Request data receiving means 23 for receiving an incoming image data file, server-side index management means 25 for creating server-side index information for the received image data file, and server-side index management for saving the created index information An information file 28, a server-side storage device 29 such as an HDD for storing the image data file, a server-side file management means 24 for writing and reading the image data file, and playing back the stored image data Replay screen control means 27 and save file information for screen replay That the screen reproduction information file 30, and a decoding unit 26 for displaying the image data file to the display device 8 is converted into a video signal. Here, each means 21-27 is comprised so that the function is realizable with the software of a computer.

(Function)
Next, the operation of the image recording system having the above configuration will be described.
<Image Data Storage Processing at Image Storage Terminal 10>
A video signal picked up by an HMI monitor 6 of an arbitrary HMI device 5 in the information system 4 and output from the HMI controller 7 is a video signal input means 11 of an image storage terminal 10 provided corresponding to the HMI device 5. Is input to the image storage terminal 10 and passed to the encoding means 12. The encoding unit 12 converts the video signal into an MPEG2 format image data file in a predetermined time unit, for example, a unit of 10 minutes by the MPEG2 encoder, and sequentially transfers the file to the terminal-side index management unit 13. Note that the encoding process of the video signal into the MPEG2 format uses a known technique, and a description thereof will be omitted.

  The terminal side index management means 13 creates index management information for the MPEG2 format image data file created by the encoding means 12 in a predetermined time unit and stores it in the terminal side index management information file 19. Also, the image data file and the index management information corresponding to this file are transferred to the terminal-side file management means 14.

  FIG. 2 shows a data configuration example of the terminal side index management information file 19. As shown in FIG. 2, the terminal-side index management information file 19 includes a file ID (index), a storage address in the terminal-side storage device 18, and update availability information indicating whether image data of the file ID can be written. Information such as the start date and time of the image data, the end date and time of the image data, and the size of the image data can be stored.

  Next, the terminal-side file management unit 14 calculates a storage address on the terminal-side storage device 18 based on the index management information passed from the terminal-side index management unit 13, and stores the image data file.

  Next, operations of the terminal-side index management unit 13 and the terminal-side file management unit 14 will be described with reference to FIGS. FIG. 3 is a flowchart showing the processing procedure of the terminal-side index management means 13 and the terminal-side file management means 14, and FIG. 4 is an explanatory diagram showing the data flow at this time.

  First, when the terminal-side index management means 13 receives the image data file from the encoding means 12 (step S100), the terminal-side index management means 13 takes in the information of the previously written file ID (step S101), and adds the number added to this number by 1 to the file ID to be written this time (Steps S102 and S103). If the file ID to be written this time is set as non-updatable in the terminal-side index management information, the number added by +1 is set as the file ID number to be written this time (step S104). When the file ID to be written this time is determined, the terminal side index management information corresponding to this file ID is updated (steps S105 to S107). That is, the current date and time are set as the start date and time (step S105), and the specified time unit, for example, 5 minutes is added to the current time as the end date and time. A value is written (step S106). Further, the size of the image data file received from the encoding means 12 is written in the size item (step S107). Thereafter, the file ID number to be written this time is passed to the file management means 14 (step S108).

  Upon receiving the file ID (step S109), the terminal-side file management means 14 takes in the storage address corresponding to the received file ID number from the terminal-side index management information (step S110), and stores the image data file in the terminal-side storage device 18. Is written in the corresponding storage address (step S111).

<Image Data Transfer Request Processing Between Image Storage Server 20 and Image Storage Terminal 10>
The image transfer request unit 21 of the image storage server 20 transfers the image data file stored in the image storage terminal 10 to any one or a plurality of image storage terminals 10 based on the image transfer command input by the operator. In order to make a request, the image transfer request information is passed to the server side communication control means 22. The server-side communication control unit 22 broadcasts the image transfer request information received from the image transfer request unit 21 to each image storage terminal 10.

  FIG. 5 is a data example of image transfer request information. As shown in FIG. 5, the image transfer request information includes a request ID (identification information) managed by the image storage server 20 that is the request source, a terminal ID that specifies the image storage terminal 10 that is the request destination, and an image that requests transfer. It consists of the start date and time of data and the end date and time of image data.

  Next, the operation when the transfer request receiving unit 15 of the image storage terminal 10 receives the image transfer request information will be described with reference to FIG.

  When receiving the image transfer request information sent from the image storage server 20, the transfer request receiving means 15 determines whether or not the terminal ID of the own apparatus is included in this information (steps S201 and S202). If the terminal ID of the own device is not included, the request is discarded, ie, ignored (“NO” in step S202).

  On the other hand, if the terminal ID of the device itself is included (“YES” in step S202), the start date, start time, end date, and end time in the image transfer request information are extracted (step S203). . Next, in order to refer to the data in the terminal-side index management information file 19, first, an initial value of the file ID is set (step S204), and the start date / time and end time / end date / end of the file ID are set. The time is extracted (step S205). Then, it is determined whether or not the extracted start time or end time is included in the time zone from the start to the end of the time information extracted in step S203 (step S206). Is stored in the temporary buffer (step S207). If another file ID exists in the terminal-side index management information file 19 (“YES” in step S208), the next file ID is set in step S209, and the processing in step S205 and subsequent steps is repeated.

  If there is no other file ID (“NO” in step S208), it is determined whether the file ID stored in step S207 is present in the temporary buffer (step S210). The file ID in the temporary buffer is notified to the terminal side file management means 14 as a transfer request file ID (step S211). On the other hand, when the file ID does not exist in the temporary buffer (“NO” in step S210), information indicating that the request data does not exist is passed to the request data transmission unit 16 (step S212).

  The terminal-side file management unit 14 extracts the storage address corresponding to the file ID received from the transfer request reception unit 15 by the process of step S211 from the terminal-side index management information file 19, and extracts the image data file at this storage address. To the request data transmission means 16.

  Upon receiving the image data file from the file management unit 14, the request data transmission unit 16 transmits the image data file to the image storage server 20 via the terminal side communication control unit 17. If information indicating that there is no request data is received from the transfer request receiving unit 15 in the process of step S212, this information is transmitted to the image storage server 20.

<Image Data Storage Processing in Image Storage Server 20>
Next, processing when the image storage server 20 receives and stores image data sent from the image storage terminal 10 will be described.

  When the server-side communication control unit 22 of the image storage server 20 receives image data from each image storage terminal 10 having the terminal ID specified by the transfer request information, the server-side communication control unit 22 transfers the received data to the server-side index management unit 25. Then, the server-side index management means 25 creates index management information for management on the server side based on this received data, stores it in the server-side index management information file 28, and stores this request ID number on the server side. The file is passed to the file management means 24.

  FIG. 7 shows a data configuration example of the server side index management information file 28. As shown in FIG. 7, the server-side index management information has data items such as a request ID, a terminal ID, and a start date and a start time of a file ID, and is sorted and managed in the order of these items. .

Next, the server-side file management means 24 takes in the image data file corresponding to the file ID of the terminal ID included in the request ID based on the request ID passed from the server-side index management means 25, and stores it as a server ID. The data is stored in the side storage device 29.
Through the above procedure, the image data stored in the image storage terminal 10 is transferred to the image storage server 20 and stored.

<Video playback processing>
Next, the video reproduction process in the image storage server 20 will be described with reference to FIG.
First, the playback screen control means 27 specifies a playback request ID, playback terminal ID, playback start date and start time, playback end date and time, in order to specify which screen of which image storage terminal 10 is to be played back. The operator is prompted to enter the date and end time (step S31). Then, the input information is taken in as reproduction screen information (step S32), and based on this information, the request ID to be reproduced, the file ID, and the reproduction order are determined from the server-side index management information (step S33). This is saved in the screen reproduction information file 30 as a screen reproduction request file ID and transferred to the server-side file management means 24 (step S34). The server side file management means 24 reads the image data file from the server side storage device 29 in accordance with the screen reproduction request file ID passed from the reproduction screen control means 27 (step S35), and transfers it to the decoding means 26 (step S36). The decoding means 26 decodes the image information of the image data file passed from the file management means 24 into a video signal and displays it on the display device 8 (step S37).

  As described above, in the image recording system according to the present embodiment, the video on the monitor is divided into a plurality of image data files and stored at predetermined time intervals in the image storage terminal 10 provided for each HMI device 5 that is an operation terminal. . The image data file is read on the image storage server 20 side, and is managed with an index. By assembling the files thus divided on the server 20 side, only necessary image data can be accumulated without waste. Further, the image storage terminal 10 can sequentially overwrite unnecessary past image data files, so that the storage capacity can be saved.

(effect)
According to the present embodiment, the monitor video of each HMI device 5 is always stored in the image storage terminal 10 for the plurality of HMI devices 5 included in the information system 4, and from the image storage server 20 as necessary. In response to the request, the image data stored on the image storage terminal 10 side is transferred to the image storage server 20 side, and managed and stored in the unit requested by the image storage server 20 side. Playback display is possible. By this video reproduction display, it is possible to efficiently analyze the status of the monitoring target and the corresponding content when an accident or the like related to the information system 4 occurs.

(Second Embodiment)
Next, a second embodiment of the present invention will be described focusing on differences from the first embodiment.

(Constitution)
FIG. 9 is a functional block diagram showing the configuration of the image recording system according to the second embodiment.
In this embodiment with respect to the configuration of the first embodiment shown in FIG. 1, the server 72 of the information system 4 has an accident detection means 61 that is activated when an accident or the like occurs in the monitoring target, and an accident or the like. An accident database 63 for storing the event information, an event request transmission unit 64 for transferring necessary information to the image storage server 20 that is activated by a request from the accident detection unit 61 or when the accident database 63 is updated, an accident And a screen display requesting means 62 for requesting a screen display at the time of detection.

Further, the image storage server 20 should receive information sent from the event request transmission unit 64 of the information system 4 and execute a necessary process, and a transfer request according to the event. A server-side accident database 66 for storing information such as image data is provided. The functions of each means 61, 62, 64, 65 are configured to be realized by computer software.
Since other means are the same as those in the first embodiment, the same means are denoted by the same reference numerals and description thereof is omitted.

(Function)
Next, the operation of the image recording system of the present embodiment having the above configuration will be described.
<Event request processing>
First, an outline of data flow when an event occurs on the information system 4 side or when an accident database is updated will be described with reference to FIG.

  If any accident occurs, the information is taken into the information system 4 and the accident detection means 61 is activated (step S41). The accident detection means 61 takes in a screen to be displayed and information on the HMI device 5 to be displayed in response to an event that has occurred from the predefined accident database 63, and transfers the information to the screen display request means 62 (step S42). The corresponding event ID (or event type, accident ID) is also transferred to the event request transmission means 64 (step S43). The event request transmission unit 64 transfers the event ID to the event request management unit 65 of the image storage server 20 (step S44).

  On the other hand, when the accident database 63 is updated, the event request transmission means 64 is activated (step S51). In the case of activation by updating the accident database 63, the event request transmission means 64 takes in the updated data in the accident database (step S52) and transfers it to the event request management means 65 of the image storage server 20 (step S53).

The processing procedure of the event request transmission means 64 in this case will be described in detail with reference to FIG. 11A. The event request transmission means 64 is activated every time an event such as an accident occurs or the accident database 63 is updated. In the case of activation (“YES” in step S301), the event ID received from the accident detection means 61 is transmitted to the event request management means 65 of the image storage server 20 (step S302). If “NO” in the step S301, it is determined whether or not the activation is due to the accident database update (step S303), and in the case of the activation due to the accident database update, update information of the accident database 63 is sent to the event request of the image storage server 20 It transmits to the management means 65 (step S304).
Through the above processing, event occurrence or accident database update information is notified from the information system 4 to the image storage server 20.

<Event request reception processing>
Next, an outline of the data flow on the image storage server 20 side notified from the information system 4 will be described with reference to FIG.

  When the data received from the event request transmission unit 64 of the information system server 72 is an event ID, the event request management unit 65 transmits transmission request information corresponding to the event ID (display terminal, display screen, transfer start time, transfer end time). Is taken from the server side accident database 66 (step S45) and passed to the image transfer request means 21 (step S46). The image transfer request means 21 converts the received transmission request information into the image transfer request information shown in FIG. 5, and issues an image data transfer request to the image storage terminal 10 via the server side communication control means 22 (step S28). .

  On the other hand, if the notification received from the information system 4 is an accident database update, the event request management means 65 rewrites the server-side accident database 66 based on the received update information (step S54).

  The processing procedure of the event request management means 65 will be described in detail with reference to FIG. 11B. The event request management means 65 is activated by receiving a notification from the event request transmission means 64 of the information system server 72 and reads the received data. (Step S401). If the received data is event occurrence data (“YES” in step S402), the transmission request information corresponding to the event ID is extracted from the server-side accident database 66 and transferred to the image transfer request unit 21 (step). S403). On the other hand, if the accident database is updated (“YES” in step S404), the server-side accident database 66 is updated (step S405).

  Thereafter, the image data related to the event is stored and displayed according to the procedures of the image transfer process between the image storage terminal 10 and the image storage server 20 and the image reproduction process described in the first embodiment.

(effect)
According to the present embodiment, when any accident or the like is detected by the information system server 72, image data corresponding to the event content is automatically captured and stored from the image storage terminal 10 without an operator's operation. Is possible. Further, when the accident database 63 is updated on the information system 4 side, the server-side accident database 66 on the image storage server 20 side can also be updated, and is always displayed on the HMI device 5 of the information system 4 when an event occurs. The image data to be processed can be taken into the image storage server 20 side.

(Third embodiment)
Next, a third embodiment of the present invention will be described focusing on differences from the first and second embodiments.
(Constitution)
FIG. 12 is a functional block diagram showing the configuration of the image storage server provided in the image recording system according to this embodiment.

The image storage server 20 in the present embodiment uses the index management information and time information (time code) of each frame of the image data with respect to the image storage server 20 of the second embodiment shown in FIG. Time information calculation means 67 for calculating the time when the video signal is input, graph creation means 68 for creating a graph of monitoring data using the calculated time, and monitoring data display for similarly displaying monitoring data using this time This is a configuration in which means 69 and data setting means 70 for setting monitoring data to be displayed in accordance with an event are added. Each means 67-70 is comprised so that the function is realizable by the software of computer.
Others are the same as those of the second embodiment, and the same means are denoted by the same reference numerals and description thereof is omitted.

(Function)
Next, the operation of each means added in this embodiment will be described.
In the image recording system of the present embodiment, the image data stored in the image storage server 20 in advance for each event and the recording time before and after the event occurrence are determined as a reference, and the image data is stored by the event occurrence. Acquired from the image storage terminal 10 and accumulated.

  First, the operator sets what is to be displayed and output together with the reproduced image in the monitoring data with time stored in the server side accident database 66 through the data setting means 70. Also, data to be displayed in a graph (usually analog data such as electricity) and discrete data (event data) to be displayed and output in time series are set.

  FIG. 13 is an example of data set by the data setting means 70 and stored in the server-side accident database 66. For each event ID, a monitoring data item (or monitoring data ID) to be displayed and output and a flag indicating whether or not to display a graph for each item can be set.

  Next, the processing of the time information calculation means 67 will be described using FIG. The time information calculation means 67 is activated at the time of image reproduction, and extracts the time stored as information on the display output frame of the image data (step S501). This time is a relative time with the time of the first frame of the image data as 00:00. Next, referring to the server-side index management information file 28, the start time of the image file being reproduced is extracted, the relative time extracted in step S501 is added, and this calculation result is added to the currently output frame. Output as time information (step S502). If the frame of the image data can be set as an absolute time, the data may be used as time information.

  Next, the operation of the graph creating means 68 will be described with reference to FIG. The graph creating means 68 is activated at the time of image reproduction, extracts the transfer start time and transfer end time corresponding to the accident ID and display screen information of the server side accident database 66, and calculates the total time for image reproduction (step) S601). Then, the data included in the time zone calculated in step S601 among the monitoring data set in the graph display is input (step S602). Further, graph data is created with the time zone as the X axis and the value of the monitoring data as the Y axis (step S603), and is displayed and output to the display device 8 (step S604).

  Next, the time information calculated by the time information calculation means 67 is input (step S605), and a mark is displayed at the time position on the X axis of the graph (step S606). Then, the value of data at the position closest to the mark position is displayed (step S607). Next, it is determined whether or not the time information has reached the end time (step S608). If the time information has not been reached, the processing from step S605 is repeated, and if the end time is reached in step S608, the processing ends. . In step S607, instead of displaying the value of the data at the position closest to the mark position, the data value in the past and the future across the mark position is linearly averaged based on the time of the mark position. You may make it display.

  Next, the operation of the monitoring data display unit 69 will be described with reference to FIG. When the monitoring data display means 69 is activated during image reproduction, it inputs the time information calculated by the time information calculation means 67 and the window size for display on the display device 8 (steps S701 and S702). Next, the displayable time is calculated from the window size, and referring to the server side accident database 66, the monitoring data before and after the predetermined time of the time information input at step S701 is extracted (step S703). Based on the time attached to the monitoring data, the display position of the monitoring data in the window is calculated using the center of the window as the time input in step S701 (step S704). The calculation result and the input time are displayed and output to the display device 8 (step S705). The above processing is repeated until the time information reaches the end time (step S706).

  FIG. 17 shows an example of the accident analysis playback screen output to the display device 8. The lower left of FIG. 17 is the image data being reproduced and output. Playback is started by pressing the playback button 83, and the progress of playback can be grasped by the indicator 81 indicating the playback position.

  The upper part of FIG. 17 is a graph created by the graph creation means 68. The voltage data corresponding to the reproduction time zone of the image data is displayed as a graph, and the mark 82 moves as the reproduction of the image data proceeds, and the voltage value at that time is displayed and output.

  The lower right of FIG. 17 is data displayed and output by the monitoring data display unit 69. At the center, a time 84 corresponding to the frame in which the image data is being reproduced is displayed, and the name of the monitoring data flows from the bottom to the top as the reproduction proceeds.

  By moving the indicator 81 or the mark 82 of the reproduction image by dragging with the mouse or the like by the processing shown in FIGS. 14 to 16, the graph and the monitoring data become the data at that time. In addition, when the playback button 83 is pressed, the pause or playback mode is switched. When the playback is stopped, the graph mark movement and the monitoring data scrolling process are also stopped in synchronization therewith.

(effect)
According to the present embodiment, the playback image and the monitoring data are displayed on the same screen, and the progress on the graph and the change of the monitoring data can be recognized in synchronization with the playback image. Analysis efficiency is improved.

  In FIG. 17, the case where the reproduction image, the graph display, and the monitoring data are displayed one by one is described. However, a plurality of graphs, monitoring data, and the like may be displayed as necessary. Also, the time information of the image being reproduced is taken out via the time information calculation means 67, and when the image data coincides with the start time of other image data, the image data reproduction process is started to synchronize a plurality of image data. Can also be played.

  In the above description, the image storage terminal 10 and the image storage server 20 are connected by the hub device 3. However, the image storage terminal 10 and the image storage server 20 may be realized as functions of one computer as an image storage unit and an image playback unit, respectively. The load may be distributed among a plurality of computers.

(Fourth embodiment)
(Constitution)
FIG. 18 is a functional block diagram showing the configuration of the image storage terminal 10 provided in the image recording system of the present embodiment. A timer means 9 and two encoding means 12a and 12b are provided for the image storage terminal 10 of the first to third embodiments, and the encoding means 12a and 12b are activated with a time difference. .

(Function)
Hereinafter, the operation of the image recording system of the present embodiment will be described.
First, the encoding unit 12a divides the signal output from the video signal input unit 11 into the file size of a predetermined time in the MPEG2 format by the same operation as the encoding unit 12 of each of the above-described embodiments, and thereby manages the terminal side index management unit. Pass to 13.

  On the other hand, the timer means 9 is activated simultaneously with the activation of the encoding means 12a. The timer means 9 is set in advance so as to measure a predetermined time in advance, taking into account the time required for the file division processing of the encoding means 12a and 12b. For example, in the file shown in FIG. 2, there is a difference of 3 seconds from the end time 8:10:35 of the file ID 1 to the start time 8:10:38 of the file ID 2 that is the next divided file. For this reason, the encoding means 12b is started after being delayed by 3 seconds or more. Normally, it may be activated with a time difference of 1/2 of the recording time of the divided file in consideration of variations in processing time. In the example of FIG. 2, a backup file that covers the blank time of recording is created as shown in FIG. FIG. 19A shows a basic divided file created by the encoding means 12a, and FIG. 17B shows a backup divided file created by the encoding means 12b. The encoding unit 12b is started 5 minutes after the start of the start of the encoding unit 12a so that the basic file and the backup file compensate for the blank time of the other recording, and is divided every 10 minutes as the encoding unit 12a. A file is being created.

(effect)
In the present embodiment, a backup file is created so as to fill in the blank time of the record. Therefore, when the blank time of the record becomes a problem in the accident analysis, the divided file is displayed and output. Part confirmation can be performed.

  The timer unit 9 is set so that the encoding unit 12b starts at the end time of the encoding unit 12a, and when the encoding unit 12a starts creating the next divided file, the encoding unit 12b is instructed by a command from the encoding unit 12a. This processing may be terminated. In this way, the storage capacity can be saved, and variations in the processing of the encoding means 12a and 12b can be absorbed.

(Fifth embodiment)
(Constitution)
FIG. 20 is a functional block diagram showing the configuration of the image storage terminal portion of the image recording system according to this embodiment. The difference from the first to third embodiments is that a video signal input means 42 for inputting a video signal into the image storage terminal 10, a distributor 41 for distributing the video signal, and a video signal relay for relaying the video signal. This is the provision of a container 43.

(Function)
In FIG. 20, the video signal input means 42 inputs the video signal output from the HMI controller 7 of the information system 4 and passes it to the distributor 41. The distributor 41 distributes the video signal delivered from the video signal input means 42 into two video signals, and one of the distributed video signals is sent to the video signal input means 11 for processing in its own terminal, The other is passed to the video signal relay means 43. Then, the video signal relay means 43 outputs the video signal passed from the distributor 41 to the HMI monitor 6 of the information system 4.

  As described above, by providing the video signal input means 42, the distributor 41, and the video signal relay means 43, the video signal from the HMI controller 7 of the information system 4 is sent to both the image storage terminal 10 and the HMI monitor 6 of the information system 4. Can be supplied.

(effect)
According to the present embodiment, by incorporating the distributor 41 that distributes the video signal in the image storage terminal 10, even if the HMI controller 7 has only a video signal output terminal to the image storage terminal 10, the HMI controller 7. The image storage terminal 10 is connected between the HMI monitor 6 and the screen display on the HMI monitor 6 and the image data storage on the image storage terminal 10 can be performed.

  The present invention is not limited to the first to fifth embodiments described above, and can be variously modified and applied without departing from the scope of the invention. For example, the encoding process of the video signal may be code-converted into another format instead of MPEG2.

  Further, the image recording system of the present invention is not limited to the server / client type, and can store / reproduce image data necessary for analyzing an accident or the like by distributing functions to a plurality of computer systems.

1 is a functional block diagram showing a configuration of an image recording system according to a first embodiment of the present invention. The table | surface which shows the data structure of the terminal side index management information file with which the image recording system of the 1st Embodiment of this invention is equipped. 3 is a flowchart showing processing procedures of a terminal-side index management unit and a file management unit provided in the image recording system according to the first embodiment of the present invention. 2 is a diagram showing a flow of image data in a terminal-side index management unit and a file management unit provided in the image recording system according to the first embodiment of the present invention. FIG. 3 is a table showing a data configuration of image transfer request information in the image recording system according to the first embodiment of the present invention. 3 is a flowchart showing a processing procedure of a transfer request receiving unit in the image recording system according to the first embodiment of the present invention. The table | surface which shows the data structure of the server side index management information file in the image recording system of the 1st Embodiment of this invention. The figure explaining the data flow in the image | video reproduction | regeneration processing by the image recording system of the 1st Embodiment of this invention. The functional block diagram which shows the structure of the image recording system of the 2nd Embodiment of this invention. The figure which shows the flow of the signal and data in the information system server with which the image recording system of the 2nd Embodiment of this invention is provided, and an image storage server. 10 is a flowchart showing a processing procedure of an event request transmission unit and an event request management unit provided in the image recording system according to the second embodiment of the present invention. The functional block diagram which shows the structure of the image storage server with which the image recording system of the 3rd Embodiment of this invention is equipped. The table | surface which illustrates the data set by the data setting means which comprises the image storage server with which the image recording system of the 3rd Embodiment of this invention is equipped. 9 is a flowchart showing a processing procedure of time information calculation means constituting an image storage server provided in the image recording system of the third embodiment of the present invention. 10 is a flowchart illustrating a processing procedure of a graph creating unit included in an image storage server provided in the image recording system according to the third embodiment of the present invention. 10 is a flowchart illustrating a processing procedure of a monitoring data display unit included in an image storage server provided in the image recording system according to the third embodiment of the present invention. The figure which shows the display screen for accident analysis in the image recording system of the 3rd Embodiment of this invention. The functional block diagram which shows the structure of the image storage terminal with which the image recording system of the 4th Embodiment of this invention is equipped. The terminal side index management information file with which the image recording system of the 4th Embodiment of this invention is provided, (a) is a basic file, (b) is a table | surface which shows the data structure of a backup file. The functional block diagram which shows the structure of the image storage terminal with which the image recording system of the 5th Embodiment of this invention is equipped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 ... Hub apparatus, 4 ... Information system, 5 ... HMI apparatus, 6 ... HMI monitor, 7 ... HMI controller, 8 ... Display apparatus, 9 ... Timer means, 10 ... Image storage terminal, 11 ... Video signal input means, 12, 12a, 12b ... encoding means, 13 ... terminal side index management means, 14 ... terminal side file management means, 15 ... transfer request receiving means, 16 ... transfer data transmission means, 17 ... terminal side communication control means, 18 ... terminal side storage 19: Terminal side index management information file, 20 ... Image storage server, 21 ... Image transfer request means, 22 ... Server side communication control means, 23 ... Request data reception means, 24 ... Server side file management means, 25 ... Server -Side index management means, 26 ... decoding means, 27 ... reproduction screen control means, 28 ... server-side index management information file, 29 Server side storage device, 30 ... screen reproduction information file, 41 ... distributor, 42 ... video signal input means, 43 ... video signal relay means, 61 ... accident detection means, 62 ... screen display request means, 63 ... accident database, 64 ... event request transmission means, 65 ... event request management means, 66 ... server side accident database, 67 ... time information calculation means, 68 ... graph creation means, 69 ... monitoring data display means, 70 ... data setting means, 72 ... information system Server, 81 ... playback indicator, 82 ... playback mark, 83 ... playback button, 84 ... playback time.

Claims (8)

  An image storage terminal for inputting a video signal for monitoring an operation terminal provided in the information system and storing the image signal as image data; and an image storage server for receiving and displaying the image data from the image storage terminal. The storage terminal includes a video signal input means for inputting the video signal, an encoding means for transcoding the input video signal to create an image data file, and an index management means for creating management information in association with the image data file The image management information added by the index management means is written to the storage device or read from the storage device, and stored in the storage device in response to a request from the image storage server. Request data transmission means for reading out image data and transmitting it to the image storage server; The image storage server transfers image data to the image storage terminal by an operator's operation, and transfers the image data transmitted from the image storage terminal to the file management unit. Request data receiving means, index management means for adding management information as image storage server files to image data, and playback screen control means for editing a screen to be played back using the stored image data. An image recording system characterized by that.   2. The image recording device according to claim 1, wherein the image storage terminal includes video signal distribution means for distributing the video signal captured from the operation terminal to the monitor device of the operation terminal and the video signal input means. system.   The image storage server extracts a database for storing image information to be reproduced upon occurrence of an event, image transfer request information corresponding to the event from the database, and the image transfer request means based on the extracted image transfer request information The image recording system according to claim 1, further comprising: an event request management unit that outputs to the screen.   The image storage terminal includes a plurality of encoding means, and each encoding means inputs a video signal output from the video signal input means, and at different times with a difference of more than the time required for image data file creation processing. 4. The image recording system according to claim 1, wherein the divided image data file is created every predetermined time.   An image storage unit that is provided for each operation terminal having a monitor and that inputs a video signal of the monitor and stores it as image data, and an image playback unit that plays back the image data stored in the image storage unit, The image reproduction unit stores image data transfer request information including a reproduction time zone before and after the event occurrence time for each event type and identification information of an image storage unit that stores image data related to the event type, and an input event An image transfer request means for outputting image data transfer request information corresponding to the event type based on the type, and an image data file sent from the image storage unit in response to the image transfer request, and in time order Image reproducing means for reproducing, and the image storage unit inputs means for inputting the video signal of the monitor and the input video signal. Means for converting and creating an image data file in units of a predetermined time; means for creating management information including at least a start time and an end time in association with the image data file; and transferring image data output from the image reproduction unit Means for determining whether to respond to the image data transfer request by inputting request information, and if it is determined to respond, refer to the management information and the start time or end time is included in the playback time zone Means for transmitting an image data file to the image reproduction section.   The image reproduction unit is configured to input and store monitoring data, data setting means for setting monitoring data to be displayed in association with the event type, and video signal input using time information of each frame of the image data A time information calculating means for calculating a time of time; and a graph of monitoring data set by the data setting means based on the reproduction time zone, and a position of the time calculated by the time information calculating means 6. The image recording system according to claim 5, further comprising: a graph creating means for displaying inside.   The image reproduction unit inputs a window size and calculates a displayable time, and extracts monitoring data belonging to the time around the time calculated by the time information calculation unit. 7. The image recording system according to claim 6, further comprising monitoring data display means for displaying. An image recording unit provided for each operation terminal having a monitor and having an image storage unit that inputs a video signal of the monitor and stores it as image data, and an image playback unit that plays back the image data stored in the image storage unit A program for a system, wherein the image playback unit program includes a playback time zone before and after an event occurrence time for each event type, and image data transfer including identification information of an image storage unit that stores image data related to the event type Processing for saving request information, processing for executing an image transfer request by outputting image data transfer request information corresponding to the event type based on the input event type, and responding to the image transfer request, Processing for inputting the image data file sent from the image storage unit and reproducing it in the order of time. The program for the section generates a management information including at least a start time and an end time associated with the image data file by processing the code of the input video signal of the monitor to create an image data file in a predetermined time unit. Processing for determining whether to respond to the image data transfer request by inputting the image data transfer request information output from the image reproduction unit, and refer to the management information if determined to respond And a process of transmitting an image data file whose start time or end time is included in the reproduction time zone to the image reproduction unit.

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