JP2007128170A - Method of controlling web screen display for inboard facility monitoring control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable screen-display for an inboard facility state at high speed in response to a screen display request from an important terminal regardless of the congestion state of a network, and to rapidly execute data update display. <P>SOLUTION: In the inboard facility monitoring control system 2 adapted to Web-deliver, for the state of various facilities within a vessel, a state monitoring screen for the facilities from a Web server 1 provided on the system 2 connected to an inboard network 20, and execute the monitoring of the facilities on a Web screen on a client terminal side 3, two kinds of a high-speed update data file 15 and a general update data file 16 differed in data update speed are prepared on the Web server side, the IP address of a client terminal which requests the display is recognized on the Web server side, and a file corresponding to the IP address is read, whereby speedup of data update in Web screen display to a specific important client terminal is achieved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a web screen display control method for an onboard equipment monitoring control system, and more particularly to a server connected to a plurality of client terminals via a network and a web browsing data distribution method in the server.

  In recent years, a monitoring system using a client / server system has appeared (for example, see Patent Document 1). In such a system, an arbitrary client makes a connection establishment request to the server, and the number of clients within the allowable capacity range of the server can be in the connection maintenance state.

  In the case of the above monitoring system, when the maximum number of clients within the allowable capacity range of the server are in the connection maintenance state, when a new connection establishment request arrives from the client, the server rejects this request. There is a problem that results in some clients unable to enter the system.

  In order to solve this problem, the server is provided with an address table for registering the IP address of the client connected through the network and in the connection maintaining state, and the connection of the connection corresponding to the IP address registered in the address table is provided. If there is a connection establishment request from a client in a state where the priority table in which priority information is registered and the IP addresses of the maximum number of clients allowed by the server are registered in the address table, the address table and the priority A connection maintenance state client having a priority equal to or lower than the priority of the client that made the opening request with reference to the table is obtained, and the IP address of the client is deleted from the address table, and the opening request is sent to the address table. The Servers and a table management unit for registering the IP address of the client that has Tsu, the connection management method in a server has been proposed (e.g., see Patent Document 2).

JP 2000-333068 A JP 2003-296270 A

  However, when using the connection management method in the server as described above to monitor the in-vessel equipment status on the web, for example, priority is given to important terminals such as the captain and engine chief, and a terminal with high priority is being accessed. If it is possible to improve the access performance of the high-priority terminal by placing the low-priority terminal in the waiting state, the conventional Web monitoring method uses the web screens of all the terminals connected to the network. Since the display speed and the data update speed are the same, depending on the network congestion situation, it may take time to display the screen and update the data on important terminals, which may hinder the monitoring of the in-vessel equipment status.

  The present invention has been made to solve the above-described problems. When the ship's equipment status is monitored on the web, a screen display request from an important terminal such as the captain or the engine chief is used regardless of the network traffic situation. In view of this, it is possible to display the screen at a high speed and to promptly execute the data update display, so that it is possible to immediately grasp the ship's state and contribute to the realization of a prompt command.

  The web screen display control method of the inboard equipment monitoring and control system according to the present invention, when monitoring the state of various equipment in the ship, is performed from the web server provided in the inboard equipment monitoring and control system connected to the inboard network. The status monitoring screen is distributed on the Web, and the equipment is monitored on the Web screen on the client terminal side. On the Web server side, there are two types: a high-speed update data file and a normal update data file with different data update speeds. Is prepared, the IP address of the client terminal that requested the display is recognized on the Web server side, and a file corresponding to the IP address is read, so that a specific important client terminal can be displayed on the Web screen. The data update speed is increased.

  As described above, according to the present invention, when web monitoring is performed on the state of the ship's equipment, the screen can be displayed at high speed in response to a screen display request from an important terminal such as the captain or the engineer, regardless of the network congestion. In addition, since the data update display can be performed quickly, the in-board state can be grasped instantaneously, which can contribute to the realization of a prompt command.

  Also, by building the data file for client transmission provided in the server with two types of high-speed update and normal update, it is possible to reduce the processing load on the server and to build a highly reliable monitoring system Can do.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIG.
FIG. 1 shows the configuration of an onboard equipment monitoring system using a server according to the present invention. In this inboard equipment monitoring system, a server 1 and client terminals 3-1 to 3 -X are connected to an inboard network 20. In the figure, only two terminals are shown.

  Reference numeral 2 denotes a monitoring and control system for various onboard equipment installed in a control room or the like in the ship, which monitors and controls each device such as an engine and a power source in the ship. This inboard equipment monitoring control system 2 includes a monitoring control device 21 and sensors 23 for detecting the state of the device, actuators 24 for controlling each device, and input / output processing of signals to the sensors 23 and the actuators 24. And is connected to the server 1.

  The server 1 receives a WWW server 10 that provides a program (HTML source or the like) that displays data for sending equipment state information of the inboard equipment monitoring control system 2 in response to access from the client terminals 3-1 to 3 -X. Have. Moreover, the server 1 is provided with the equipment state data processing means 14 for setting to the site which provides an equipment state to the client terminals 3-1 to 3-X. This equipment state data processing means 14 has a high-speed update data file 15 and a normal update data file 16 that are updated at two speeds, normal and high-speed, in order to correspond to the browsing data update cycle requested by the client terminal side. is doing.

  The server 1 includes an address table 11, a data update rate table 12, and a table management unit 13 in addition to the WWW server 10 and the equipment state data processing unit 14. The address table 11 is for registering the IP address of the client terminal in the connection maintaining state. In this address table 11, the IP addresses of the maximum number of client terminals that allow the server 1 to maintain the connection maintenance state can be registered.

  The data update rate table 12 is registered with data update rate information requested for each client terminal corresponding to the IP address.

  The table management means 13 has a mechanism for recognizing the requested data update rate of the client terminal that made the opening request with reference to the address table 11 in which the IP address of the client terminal is registered and the data update rate table 12.

  Each of the client terminals 3-1 to 3 -X is provided with a Web browser 31, which is configured to access the WWW server 10 of the server 1.

  Next, the operation will be described. As for the state signal of the inboard equipment, the signal input / output device 22 of the inboard equipment monitoring control system 2 collects signals of sensors 23 for detecting the state of the equipment and actuators 24 for performing control on each device, and performs monitoring control. After being collected as transmission data by the device 21, it is sent to the server 1. At this time, the transmission cycle to the server 1 is transmitted at a speed that can correspond to the high-speed data update of the equipment state data processing means 14 in the server 1, that is, at a speed faster than the high-speed data update.

  The status signal of the inboard equipment transmitted from the inboard equipment monitoring control system 2 to the server 1 is stored in both the high-speed update data file 15 and the normal update data file 16 by the equipment status data processing means 14 in the server 1. To do. Here, the speed of the high-speed update refers to an update period of about the control period (for example, 50 msec) implemented in the inboard equipment monitoring control system 2, and the normal update speed is the monitoring control device of the inboard equipment monitoring control system 2. 21 indicates an update cycle of the display update speed (for example, 2 sec) of the monitor screen.

  The high-speed update data file 15 is used as distribution data to important terminals such as captains and engine chiefs, and the normal update data file 16 is distribution data to general terminals that do not require a data update rate from the important terminals. It is used as As a result, it is not necessary to support all processing performance of the server 1 with the required specifications of important terminals such as captains and engine chiefs that are required to update high-speed data, and the processing load of the server 1 is reduced and the system is highly reliable. It becomes possible to construct as.

  When there is a connection opening request from the client terminal in a state where the IP address of the client terminal is registered in the address table 11, the table management means 13 of the server 1 issues an opening request with reference to the address table 11 and the data update rate table 12. Recognize the requested data update rate of the client terminal that has been performed, and in the equipment status information sent to the client terminal, the data file of the update rate requested from two types of data files, the high-speed update data file 15 and the normal update data file 16 Select. The equipment state data processing means 14 sets distribution data to the client terminal to the WWW server 10 based on the selection result.

  At this time, it is necessary to limit the number of important terminals to which the high-speed update data file 15 registered in the data update speed table 12 is distributed so that the processing performance of the server 1 is not deteriorated. By doing so, high-speed data update performance can be ensured, and stable high-speed data distribution to important terminals becomes possible.

  In the client terminals 3-1 to 3 -X that have made the connection closing request, the Web browser 31 can access the WWW server 10 of the server 1, and monitor the onboard equipment state at the requested data update rate.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the inboard equipment monitoring system which shows Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Server 10 WWW server 11 Address table 12 Data update speed table 13 Table management means 14 Equipment state data processing means 15 High-speed update data file 16 Normal update data file 2 Inboard equipment monitoring control system 20 Inboard network 21 Monitoring control device 22 Signal input / output Device 23 Sensors 24 Actuators 3-1 to 3-X Client terminal 31 Web browser

Claims (3)

  When monitoring the status of various facilities in the ship, the device status monitoring screen is distributed from the Web server provided in the inboard facility monitoring and control system connected to the inboard network. In the onboard equipment monitoring and control system that monitors the equipment, prepare two types of high-speed update data files and normal update data files with different data update speeds on the Web server side, and display them on the Web server side. An inboard ship that recognizes the IP address of the requested client terminal and reads a file corresponding to the IP address to speed up the data update on the Web screen display for a specific important client terminal Web screen control method for equipment monitoring control system.   On the Web server side, equipment status data processing means having a high-speed update data file and a normal update data file that are updated at two different speeds in order to correspond to the browsing data update cycle requested by the client terminal side, An address table for registering the IP address of the client terminal, a data update rate table for registering data update rate information required for each client terminal corresponding to the IP address, and an address table for registering the IP address of the client terminal 2. A web screen control method for an onboard equipment monitoring control system according to claim 1, further comprising table management means for recognizing a requested data update speed of a client terminal that has made an opening request with reference to a data update speed table. . The number of important terminals that deliver high-speed update data files registered in the data update speed table is limited to such an extent that the processing capacity of the Web server is not reduced. Web screen control method.

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