JPH0447898A - Remote supervisory system - Google Patents

Abstract

PURPOSE:To eliminate the contention of the transmission of an information transmission request signal by allowing a supervisory station being a master station to send an information transmission request signal to all stations to be supervised in the predetermined station number and allowing the stations to be supervised to send their own supervisory information while the information is superimposed on a supervisory information signal. CONSTITUTION:A supervisory station equipment 3a of a supervisory station 1a sends an information transmission request signal 7 to a station 2a to be supervised by an information transmission request signal transmission means 5. A supervised station equipment 4a of the station 2a ends supervisory information of its own station to supervisory stations 1a, 1b as a supervisory information signal 8 upon the receipt of a signal 7 addressed to its own station. Then the supervisory station equipments 3a, 3b of the stations 1a, 1b receive the signal 8 by supervisory information signal reception means 6a, 6b respectively to collect the supervisory information of the station 2a. Then the station 1a sends an information transmission request signal 7 to the station 2b and sends the supervisory information of its own station to the stations 1a, 1b as the signal 8 when the station 2b uses the supervised station equipment 4b to receive the signal 7 addressed to its own station. The stations 1a, 1b receive the signal 8 respectively to collect the supervisory information of the station 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote monitoring system, and particularly to a remote monitoring system in which a plurality of monitored stations are monitored from a plurality of monitoring stations.

[Conventional technology]

Conventionally, within a single monitoring system consisting of multiple monitored stations and multiple monitoring stations that monitor them, a remote monitoring method in which each monitoring station monitors a predetermined monitored station, Using one common carrier wave, one monitoring station transmits an information transmission request signal to the necessary monitored station, and when the monitored station receives the information transmission request signal, it transmits its own monitoring information to the monitoring information signal. It was sent to the monitoring station as Then, the monitoring station was able to receive this and collect the monitoring information of the monitored station.

In order to collect monitoring information from all the monitored stations to which the monitoring station is assigned, the monitoring station must send out information transmission request signals in order of the numbers of the monitored stations. We were able to collect monitoring information from all monitored stations. Other monitoring stations intercept the information transmission request signal of the monitoring station that previously collected monitoring information and the corresponding monitoring information signal from the monitored station, and transmit the monitoring information from the monitored station to which it also shares the monitoring responsibility. When the information signal was received, monitoring information was collected from it. While these signals are being transmitted and received, the own station cannot send out information transmission request signals and collect monitoring information from the monitored stations that the own station is responsible for. When the transmission and reception of the signals is completed, the own station collects monitoring information by transmitting information transmission request signals only to the monitored stations required by the local station.

[Problem to be solved by the invention]

In the conventional remote monitoring method described above, when the respective monitored stations monitored by each monitoring station do not match, the monitoring station that was intercepting the collection of monitoring information of the other monitoring station will not be able to access the monitoring station that is needed. It is necessary to collect monitoring information by sending an information transmission request signal only to the monitored station that is being monitored, and this may cause conflicts in sending out information transmission request signals between monitoring stations, or the monitoring station that is responsible for monitoring There has been a problem in that the monitoring information signals from the monitored station cannot necessarily be received in a predetermined order, and the process for receiving the monitoring information signal from the monitored station is complicated.

[Means to solve the problem]

The remote monitoring system of the present invention includes a plurality of monitored station devices that transmit own station monitoring information as a monitoring information signal, and is connected to the monitored station devices via a communication line, receives the monitoring information signal, and receives the monitoring information signal from the monitored station device. In a remote monitoring system configured with a plurality of monitoring station devices that collect monitoring information of a monitored station in which a monitored station device is installed, a request is made to send out a monitoring information signal from one of the monitoring station devices. The monitoring station device, which is a main station that sends information transmission request signals to the plurality of monitored station devices, (A) transmits information transmission request signals to the plurality of monitored station devices in a predetermined order. (B) Monitoring from the monitored station device installed in the monitored station whose monitoring is shared by the own station among the monitoring information signals received from the plurality of monitored station devices; Monitoring information signal receiving means for reading only information signals and collecting monitoring information, wherein the monitoring station device that does not send out the information sending request signal and becomes a slave station is equipped with the monitoring information signal receiving means.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The remote monitoring system shown in FIG. It is composed of monitored station devices 4a to 4e.

The monitoring station device 3a also includes a plurality of monitored station devices 4a to 4.
The information sending request signal sending means 5 sends out the information sending request signal 7 in a predetermined order to It consists of a monitoring information signal receiving means 6a that reads only the monitoring information signal from the monitored station equipment installed in the monitored station that the station is responsible for monitoring, and collects the monitoring information.

The monitoring station device 3b also includes a plurality of monitored station devices 4a to 4.
Among the monitoring information signals received as the monitoring information signal 8 from e, the station reads only the monitoring information signals from the monitored station equipment installed at the monitored station that its own station is responsible for monitoring, and collects the monitoring information. It consists of monitoring information signal receiving means 6b.

Next, the operation will be explained.

FIG. 2 shows a monitoring station device 3a of the remote monitoring system shown in FIG.
, 3b, and the monitored stations 2a to 2e each have a plurality of monitored station devices 4a to 4e installed.
FIG. 2 is a diagram showing a monitoring system in which the two are connected to each other via a bidirectional communication line.

FIG. 2(a) shows that the monitoring station 1a monitors the monitored stations 2a to 2c, and the monitoring station 1b monitors the monitored stations 2a to 2e.

FIG. 2(b) shows a state in which the monitoring station 1a sequentially transmits information transmission request signals to the monitored stations 2a to 2e.

In addition, in FIG. 2(C), the monitored station 2 is connected to the monitoring stations la and lb.
This shows a state in which signals a to 2e sequentially transmit the monitoring information signal 8.

In FIG. 2(a), the monitoring station 1a is connected to the monitored stations 2a to 2a.
As the main station for monitoring operations for 2e, monitored stations 2a to 2
It is assumed that the information transmission request signal 7 is sequentially transmitted to e.

As shown in FIG. 2(b), the monitoring station device 3a of the monitoring station 1a first sends an information transmission request signal 7 for collecting monitoring information from the monitored station device 4a of the monitored station 2a as an information transmission request. The signal transmission means 5 transmits the signal to the monitored station 2a. When the monitored station device 4a of the monitored station 2a receives the information transmission request signal 7 addressed to its own station, as shown in FIG. , lb
Send to. And the supervisor of surveillance stations 1a and lb! 3
a, 3b can receive this by the monitoring information signal receiving means 6a, 8b, respectively, and collect the monitoring information of the monitored station 2a.

Next, the monitoring station 1a sends an information transmission request signal 7 to the monitored station 2b.
When the monitored station 2b receives the information transmission request signal 7 addressed to itself by the monitored station device 4b, it sends the monitoring information of its own station as the monitoring information signal 8 to the monitoring stations 1a+1b. The monitoring station 1atlb receives each of these and collects the monitoring information of the monitored station 2b.

As described above, the monitoring station 1a transmits the information transmission request signal to the monitored station 2 by sequentially sending the information transmission request signal in the order of the station number of the monitored station.
Monitoring information can be collected from all stations a to 2c, and monitoring station 1b can collect monitoring information from all monitored stations 2a to 2e. At this time, even if the monitoring station 1a transmits the information transmission request signal to the monitored stations 2d to 2e, since the monitoring information signals from the monitored stations 2d to 2e are not needed, the monitoring station 1a only intercepts them and does not collect any information.

〔Effect of the invention〕

As explained above, in the present invention, the monitoring station, which is the main station, transmits information transmission request signals to all monitored stations in the order of predetermined station numbers, and the monitored stations In response to the information transmission request signal, the monitoring information of the own station is sent along with the monitoring information signal, and the monitoring station receives only the monitoring information signal from the necessary monitored station, thereby enabling information transmission between monitoring stations. It is possible to receive the monitoring information signals from the monitored stations that are assigned to the own station in a predetermined order without causing any conflict in the transmission of request signals, and the reception processing of the monitoring information signals from the monitored stations is easy. This has the effect of making it easier.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
The monitoring system shown in the figure consists of multiple monitoring stations equipped with remote monitoring system monitoring station equipment and monitored stations equipped with multiple monitored station equipment, connected to each other via bidirectional communication lines. FIG. la, lb...Monitoring station, 2a-2e...
・Monitored station, 3a, 3b...Monitoring station device, 4a
~4e... Monitored station device, 5... Information sending request signal sending means, 6a, 6b... Monitoring information signal receiving means, 7... Information Transmission request signal, 8
...Monitoring information signal. Agent patent attorney Shindai Uchihara! Must (U) (b) (C) No.? figure

Claims (1)

[Scope of Claims] 1. A plurality of monitored station devices that transmit own station monitoring information as monitoring information signals, and a plurality of monitored station devices that are connected to the monitored station devices via communication lines, receive the monitoring information signals, and transmit the monitoring information signals to the monitored station devices. In a remote monitoring system configured with a plurality of monitoring station devices that collect monitoring information of a monitored station in which a monitored station device is installed,
Among the monitoring station devices, the monitoring station device, which serves as a main station and transmits an information transmission request signal indicating a request to send a monitoring information signal to the plurality of monitored station devices, (A) the plurality of monitored stations; (B) information transmission request signal sending means for transmitting information transmission request signals to the devices in a predetermined order; monitoring information signal receiving means for collecting monitoring information by reading only a monitoring information signal from a monitored station device installed in the monitored station, the monitoring information signal receiving means for collecting monitoring information; A remote monitoring system characterized in that a monitoring station device includes the monitoring information signal receiving means. 2. In the remote monitoring system according to claim 1, the information sending request signal sending means sends information sending request signals to the plurality of monitored station devices in the order of station numbers predetermined for each of the monitored stations. A remote monitoring method characterized by transmitting signals.