JP2882715B2 - Remote monitoring system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring system including a plurality of remote monitoring devices for automatically transmitting abnormality detection information to a remote receiving device via a communication line when an intrusion or equipment abnormality is detected. .

[0002]

2. Description of the Related Art FIG. 2 shows a remote monitoring system in which a plurality of remote monitoring devices are connected to the same telephone line. In FIG. 2, reference numeral 6 denotes an exchange, 7 denotes a receiving device, 5a to 5n denote remote monitoring devices, and the remote monitoring devices 5a to 5n are connected to the receiving device 7 which is separated via the exchange 6.

The remote monitoring devices 5a to 5n
Are switches 4a-4n for disconnecting the telephone lines, line interface circuits 3a-3n for interfacing with the telephone lines, inter-device transmission interface circuits 2a-2n for determining the right to use the telephone lines, and Control circuits 1a to 1n for controlling the control circuit 1a
1 to 1n are switches 4a to 4n so that one remote monitoring device is connected to the telephone line by the line use right request information transmitted through the inter-device transmission interface circuits 2a to 2n.
control n.

Next, the operation according to the above configuration will be described with reference to FIG. 3 showing a procedure for switching the right to use the telephone line. Here, the remote monitoring device 5a has the right to use the telephone line, connects the switch 4a, and the other remote monitoring devices 5b to 5n.
It is assumed that the switches 4b to 4n are disconnected and the remote monitoring device 5b detects an equipment abnormality or the like, and an event that uses the telephone line occurs.

First, the control circuit 1b requests a use right to the control circuit 1a via the inter-device transmission interface circuits 2b and 2a. When receiving the request (step S1), the control circuit 1a checks whether or not the own remote monitoring device 5a is currently using a telephone line to detect equipment abnormality and transmit the information to the receiving device 7. (Step S2).

The control circuit 1a determines that the right to use the line can be passed to the remote monitoring device 5b if the telephone line is not in use, and transmits the information to the inter-device transmission interface circuits 2a and 2b.
To the control circuit 1b to disconnect the switch 4a from the telephone line. On the other hand, the control circuit 1b connects the switch 4b, and sends abnormality information to the receiving device 7 via the line interface circuit 3b and the exchange 6 (step S4).

On the other hand, when the telephone line is in use, the control circuit 1a of the remote monitoring device 5a uses the telephone line as it is and sends out the abnormal information to the receiving device 7, and then determines the right to use the line by the remote monitoring device. 5b (step S5).

[0008]

Since the conventional remote monitoring system is configured as described above, one remote monitoring device connected to the same telephone line can monitor another remote monitoring device while using the telephone line. Even if an error occurs in the device, there are problems such as waiting until the remote monitoring device in use has finished sending information, or having to stop sending information from the remote monitoring device in use. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and when abnormality information is detected, the right to use the telephone line can be switched according to the content of the abnormality detection information. The aim is to obtain a remote monitoring system.

[0010]

According to a first aspect of the present invention, there is provided a remote monitoring system in which a plurality of remote monitoring devices for automatically transmitting abnormality detection information to a remote receiving device are connected to the same communication line, and each remote monitoring system is connected to a remote monitoring device. Equipment connected to each other
A device- to- device transmission interface circuit for transmitting line usage right request information for switching the usage right of the same communication line ;
The same information is transmitted to the remote monitoring device which transmits the line usage right request information with information indicating the degree of urgency of the abnormality detection information added thereto based on the content of the information indicating the degree of urgency. and switching control means for switching the right to use the communication line is obtained with each.

According to a second aspect of the present invention, there is provided a remote monitoring system, wherein a plurality of remote monitoring devices for automatically sending abnormality detection information to a remote receiving device are connected to the same communication line, and each remote monitoring system is connected to the remote monitoring device.
The apparatus comprising: a <br/> inter-device transmission interface circuit mutually transmitting rotary line usage rights request information for switching the right to use the same communication line are connected to each other, the abnormality in the line use right request information transmitted by adding information indicating the urgency of the detected information, the remote monitoring device that sent the times line usage rights requested information after the time of response to the content of the information indicating the urgency
Switching control means Tooso to switch the right to use the same communication line
Each is provided.

[0012]

In the remote monitoring system according to the first aspect of the present invention, the right to use the communication line is determined based on the content of the detected abnormality information. Then, the right to use the line is switched to the remote monitoring device that sends the information.

Further, in the remote monitoring system according to the second aspect, the line use right switches after a time corresponding to the content of the information indicating the degree of urgency.

[0014]

[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a procedure for switching a telephone line use right according to an embodiment of the present invention in a remote monitoring system having the configuration shown in FIG.

Now, when the remote monitoring device 5a shown in FIG. 2 has the right to use the telephone line and the switch 4a is connected, the remote monitoring device 5b detects an abnormality in the equipment and uses the telephone line. Is generated. First, the control circuit 1b
Adds information indicating the urgency of the detected abnormality information to the line usage right request information, and
Notification is sent to the control circuit 1a via b and 2a.

Then, the control circuit 1a checks whether or not the self-remote monitoring device 5a detects a facility error or the like and determines whether the telephone line is currently used (steps S1 and S2). Hand over to the remote monitoring device 5b (step S
4) If it is in use, the information of the urgency added to the received use right request information is checked (step S3).

Here, when the degree of urgency is higher, the control circuit 1a stops sending to the receiving device 7 by the self-remote monitoring device 5a, disconnects the switch 4a, and grants the right to use the telephone line. To pass the inter-device transmission interface circuit 2
The control circuit 1b is notified via a and 2b. Control circuit 1
b connects the switch 4b and sends out the detection abnormality information to the receiving device 7 (step S6).

When the urgency is low, the remote monitoring device 5
The control circuit 1a uses the telephone line as it is and passes the right to use the line to the receiving device 7 after the transmission of the abnormal information is completed (step S5).

Embodiment 2 FIG. In the above-described embodiment, an example is shown in which the right of use is given according to the degree of urgency, but the right to use the line may be given after a time corresponding to the content of the degree of urgency.
In this way, the lower the urgency of the line use right by the remote monitoring device before switching, the longer the delay time is secured.

[0020]

As described above, according to the first aspect of the present invention, the remote monitoring devices are connected to each other, and
Line usage right request to switch the usage right of one communication line
A transmission interface circuit between devices that transmit information
Indicate the urgency of the abnormality detection information in the line usage right request information
Information that is transmitted with the
After the time corresponding to
Switch the right to use the same communication line to the remote monitoring device
Switching control means for switching the right to use the line according to the urgency of the detected abnormal information, so that a plurality of remote monitoring units connected to the same communication line can be monitored.
Anomaly detection information is sent from each device via the same communication line.
Error when automatically sending a report to a remote receiver
The right to use the same communication line is determined by the content of the information,
When emergency detection information with a high degree of urgency occurs even while using the communication line
The right to use the line is released to the remote monitoring device that sends that information.
In other words, there is an effect that information with high urgency is not waited for and information with high urgency is not interrupted despite low urgency.

According to a second aspect, each remote monitoring device
And the right to use the same communication line
A device that transmits line usage right request information for switching
Transmission interface circuit and the above-mentioned line use right request information
Is transmitted with information indicating the urgency of the abnormality detection information
After a time corresponding to the content of the information indicating the urgency,
Same as above on the remote monitoring device that sent the line usage right request information
Switching control means for switching the right to use the communication line
Provided that, since it is configured to switch the line usage right after the time that according to the contents of urgency, is attached to the same communication line
From the same remote communication device
Automatic transmission of anomaly detection information to a remote receiver via a line
The line after a time corresponding to the content of the information indicating the degree of urgency.
There is an effect that the right to use is switched , and the right to use the line of the remote monitoring device before the switching is secured for the above-mentioned time, and is not immediately interrupted.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a procedure for switching a line use right according to the present invention.

FIG. 2 is a configuration diagram of a remote monitoring system.

FIG. 3 is a flowchart showing a conventional line use right switching procedure.

[Explanation of symbols]

 1a to 1n control circuit 2a to 2n inter-device transmission interface circuit 3a to 3n line interface circuit 4a to 4n switch 5a to 5n remote monitoring device 6 converter 7 receiving device

Claims (2)

(57) [Claims] 1. A plurality of remote monitoring devices for automatically transmitting abnormality detection information to a remote receiving device are connected to the same communication line.
To each remote monitoring device, line usage right request information for switching the usage right of the same communication line which is connected to each other is provided.
And inter-device transmission interface circuit mutually transmitted, by adding information indicating the urgency of the abnormality detection information to the line use right request information to transmit, the line access request based on the content of the information indicating the urgency To the remote monitoring device that sent the information
Switching control means for switching the right to use the same communication line ;
Remote monitoring system, characterized in that the provided respectively. 2. A plurality of remote monitoring devices for automatically transmitting abnormality detection information to a remote receiving device are connected to the same communication line,
Each remote monitoring device, the times line usage rights request information for switching the right to use the same communication line are connected to each other
And inter-device transmission interface circuit mutually transmitted and transmits by adding information indicating the urgency of the abnormality detection information to the line use right request information, the times line after a time corresponding to the contents of the information indicating the urgency remote monitoring system is characterized in that each comprise a switching control means for switching the right to use the same communication line to a remote monitoring device that sent the usage rights request information.