JPH10124418A - Remote control method using WWW server - Google Patents

Abstract

(57) [Problem] To provide a remote control method using a WWW server that can accurately and remotely control a remote device having a WWW server from a WWW browser via a network using an applet. SOLUTION: A WWW browser 3 makes a request for loading an applet to a second WWW server 52 via a first WWW server 51 provided in a remote device 5, and the first WWW server 52 sends the first applet to the first WWW server 52. The applet is received via the WWW server 51, and the received applet is used to communicate with the remote device 5 having the first WWW server 51 to remotely control the remote device 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a WWW (World Wi-Fi).
de Web) An operation request is made from a WWW browser to a remote device having a
The present invention relates to a remote control method using a WWW server that performs remote control such as remote monitoring, remote maintenance, or remote operation of a remote device from a browser.

[0002]

2. Description of the Related Art Conventionally, remote monitoring via a network,
In a system for remote maintenance and remote control, functions have been realized by constructing dedicated application software on the device side and the operator side and connecting them with an appropriate protocol.

In recent years, with the development of the Internet technology centering on WWW, inexpensive browser software or server software has been developed. If these are used, a system for remote monitoring, remote maintenance, and remote operation can be constructed at a lower cost.

In the WWW, the user interface is HTM
Described in the form of an L (Hyper Text Markup Language) document and displayed on a browser. More recently developed browsers have the ability to run Java applets, but Java
In the case where va is used, dynamic processing can be performed with a browser as compared with the case where only HTML documents are used, and a more advanced user interface can be realized.

[0005] The applet has a network communication function, but at present, there is a browser which restricts communication only with a computer having a WWW server loaded with the applet.

[0006]

When remote monitoring, remote maintenance, and remote operation are performed using the WWW, the first WWW server is incorporated in a device located at a remote place. The first WWW server sends out the internal information of the remote device and starts a process in response to an operation request for the remote device sent from the browser.

The browser performs processing such as presenting information to an operator and sending an operation request to a WWW server. The processing is realized by an applet such as sequentially displaying data sent at regular intervals using a network function. Using a function that can be used can realize a more advanced user interface as compared with a case where only an HTML document is used.

[0008] An applet that operates on a browser is loaded from a second WWW server provided separately from the viewpoint of the storage capacity of the remote device and the software maintainability of the applet, as compared with the case where the applet is loaded from a WWW server incorporated in the remote device. It is better to load.

However, the applet loaded from the second server may not be able to receive the first applet due to the restriction of the communication function of the applet.
Cannot communicate with the remote device where the server is located. Therefore, there is a problem that a user interface that requires access to information inside the remote device from the applet cannot be realized.

[0010] The present invention has been made in view of the above,
It is an object of the present invention to provide a remote control method using a WWW server that can accurately and remotely control a remote device having a WWW server from a WWW browser via a network using an applet.

[0011]

To achieve the above object, according to the present invention, an operation request is made from a WWW browser to a remote device having a first WWW server, and the remote device having the first WWW server receives the operation request from the WWW browser. A second WWW different from the first WWW server for remotely controlling a remote device
A server system in which an applet is loaded on a server, wherein a WWW browser is provided on a first device provided on a remote device.
Makes a request to load an applet to the WWW server of the first, and the first WWW server responds to the load request by the second WWW server.
Makes an applet request to the WWW server of the second
Receives an applet from a WWW server of a first WWW
The server sends the applet received from the second WWW server to the WWW browser, and the WWW browser sends the applet to the first WWW server.
Using the applet received via the W server, the first W
The gist is to communicate with a remote device having a WW server and to remotely control the remote device.

According to the first aspect of the present invention, WWW
The browser makes an applet load request to the second WWW server via the first WWW server provided in the remote device, receives the applet from the second WWW server via the first WWW server, The received applet is used to communicate with a remote device having the first WWW server and to remotely control the remote device.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a WWW according to an embodiment of the present invention.
It is a figure showing the composition of the server system which implements the remote control method using a server. The embodiment shown in FIG. 1 presents a system for monitoring (displaying in a browser) joint values of a robot manipulator provided in a remote place in real time, as an example.
When the browser 3 is connected, the WWW browser 3
A remote device 5 provided at a location remote from the Internet is connected to the network 1. This remote device 5 has a first WWW
It has a server 51 and a manipulator 53. Also,
A second WWW server 52 loaded with a Java applet is connected to the network 1.

In the server system configured as described above, the WWW browser 3 observes the joint value of the manipulator 53 in the remote device 5, communicates with the task of transmitting the value at regular intervals, and receives the value. Then, a request is made to the first WWW server 51 of the remote device 5 for an applet to be displayed on the WWW browser 3 while being rewritten at regular intervals, as indicated by the thick dotted arrow (1) in FIG. The first WWW server 51, which has received the applet request, performs an applet request to the second WWW server 52 where the applet actually exists as shown by a thick dotted arrow (2) as a processing of the request. The result is received as indicated by the thick dotted arrow (3). Then, the first WWW server 51 transmits the reception result to the WWW browser 3 (thick dotted arrow (4)).

Thus, the first WWW server 51
The WWW browser 3 that has received the contents of the applet from the second WWW server 52 via the server executes the applet. The applet attempts to initiate communication with the task transmitting joint values in the remote device 5, in which case the applet is viewed from the WWW browser 3 by the first W
Since it looks as if the applet was loaded from the WW server 51, the communication is successfully started as shown in FIG. When the applet starts the communication, the data transmitted from the task for transmitting the joint value can be displayed on the WWW browser 3.

[0017]

As described above, according to the present invention,
The WWW browser issues an applet load request to the second WWW server via the first WWW server provided in the remote device, and the second WWW server sends the applet to the first WWW server.
The applet is received via the W server, the received applet is used to communicate with the remote device having the first WWW server, and the remote device is remotely controlled. Therefore, the applet operated by the WWW browser is provided in the remote device. A Java applet that communicates with a remote device can be operated even when housed in a WWW server and another WWW server, and has higher operability and functions than the user interface described in HTML only, described in the Java applet. A user interface for a remote device can be realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a server system that implements a remote control method using a WWW server according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation when an applet communicates with a remote device in the server system shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 network 3 WWW browser 5 remote device 51 first WWW server 52 second WWW server 53 manipulator

Claims (1)

[Claims] 1. An operation request is made from a WWW browser to a remote device having a first WWW server, and
A server system for remotely controlling a remote device from a browser and loading an applet on a second WWW server different from the first WWW server, wherein the WWW browser is a first WWW server provided in the remote device. Makes a request to load an applet, and the first WWW server responds to the load request by a second WWW server.
A request for an applet is made to the WW server, and the second W
Receiving an applet from a WWW server, the first WWW server transmitting an applet received from the second WWW server to a WWW browser, and the WWW browser using the applet received via the first WWW server to perform a first A remote control method using a WWW server, comprising communicating with a remote device having a WWW server and remotely controlling the remote device.