JPH0482425A - Supervisory and control system - Google Patents

Abstract

PURPOSE:To dispense with a dedicated line switching information transmission part by transmitting line switching information from a supervisory station in a dial signal. CONSTITUTION:When a satellite line 2 is interrupted, the line switching part 9 of a controller 4 to be monitored receiving a transmitted PB signal returns an incoming tone to a supervisory controller 3 by performing the dial operation of a telephone set 5. A prescribed PB signal is sent out by performing the dial operation of the telephone set 5 at a center side confirming the incoming tone, and also, a supervisory controller 8 is connected to ground switching line 11, 12 sides by switching line switching parts 6, 7 by a manual operation. When a fault is recovered, the transmission line of supervisory control signal is returned to the satellite line 2 by operating the supervisory station, thereby, it is possible to dispense with the dedicated line switching information transmission part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a supervisory control system, and more particularly to a supervisory control system that centrally monitors equipment of a ground station that constitutes a satellite link.

[Conventional technology]

Conventionally, when transmitting television video signals, etc. between two or more ground stations using a satellite line, the terrestrial line was used as a countermeasure in case the satellite line was disconnected due to equipment failure, rain, etc. It is set up as a backup line for the satellite line, and when the satellite line is disconnected, the terrestrial line is used instead of the satellite line.
When the satellite line was disconnected, it was restored to the satellite line.

In addition, the supervisory control line used as a transmission path for supervisory control signals used in the supervisory control system that monitors equipment usually uses a satellite line, but when the satellite line is disconnected, the supervisory control In order to switch lines from satellite lines to terrestrial lines and vice versa, line switching control was performed on supervisory control lines.

[Problem to be solved by the invention]

The conventional monitoring and control system described above, when the satellite line is disconnected,
In order to encode and modulate the line switching information of the monitoring control line input by the operator of the monitoring ground station, and transmit it to the monitored station,
There was a problem in that a line switching information transmitter for a dedicated supervisory control line was required.

An object of the present invention is to solve the above problems and provide a supervisory control system that eliminates the need for a line switching information transmitter.

[Means to solve the problem]

The supervisory control system of the present invention includes a monitored and controlled device installed at a first ground station of a satellite line to monitor and control equipment of the first ground station, and a monitored control device installed at a second ground station of the satellite line. and a supervisory control device that remotely monitors and controls the equipment of the first ground station via the monitored and controlled device, the satellite line is used as a transmission path for a supervisory control signal, and the satellite line is In a supervisory control system that uses a terrestrial switched line as a switching backup line, the supervisory control device (A) sends first line switching information and second line switching information to a dial signal when the satellite line is disconnected; (B) after receiving a confirmation signal sent back from the monitored control device indicating that the first line switching information has been received;
a first line switching means for switching a transmission path of a supervisory control signal between the first ground station and the second ground station from the satellite line to the ground switched line, the line switching means being activated; (C) the dial signal transmitting means transmits the second line switching information to the monitored controlled device using a dial signal, and the monitored controlled device (C) transmits the first line switching information and the second line switching information. information via the terrestrial switched line, transmitting the confirmation signal when receiving the first line switching information;
a second line switching means for switching a transmission path for a supervisory control signal between the first ground station and the second ground station from the satellite line to the terrestrial switched line when receiving line switching information; We are prepared.

〔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 supervisory control system shown in FIG. The ground station consists of a monitored control device 4 installed at a monitored station (first ground station).

Furthermore, when the satellite line 2 is disconnected, the supervisory control device 3 transmits the first line switching information and the second line switching information from the monitoring station to the monitored control device 4 by means of a PB double signal dial signal).
After receiving a confirmation signal indicating that the first line switching information has been received, which is returned from the telephone (PB signal transmitting means) 5 and the monitored control device 4, the communication between the monitoring station and the monitored station is It is comprised of a line switching unit (first line switching means) 6, 7 that switches the transmission path of the supervisory control signal from the satellite line 2 to the terrestrial exchange line 11, 12, and a supervisory control unit 8 having a remote supervisory control function.

Additionally, the monitored controlled device 4 receives the first line switching information and the second line switching information via the terrestrial switched lines 11 and 12, and transmits a confirmation signal when receiving the first line switching information. , when receiving the second line switching information, the line switching unit (second line switching means) 9, and a monitored control section 10 having a monitoring control function.

Next, the operation will be explained.

In Figure 1, for example, due to the influence of rain, the communication satellite 1
If the satellite line 2 via the PB signal is disconnected, the PB double signal first line switching information sent to the monitored control device 4 by the operator of the monitoring station dialing the telephone 5 of the monitoring control device 3) The line switching unit 9 of the monitored control device 4 that received the incoming tone (confirmation signal)
I will send it back. Then, by dialing the telephone 5 by the operator on the center side who has confirmed this incoming tone, the predetermined PB double signal (second line switching information) is sent out, and the switch of the line switching unit 7 is manually set to side b. , and also switches the switch of the line switching unit 6 to the d side to connect the supervisory control unit 8 to the terrestrial exchange lines 11 and 12. When the monitored control device 4 receives the PB multiple signal, the line switching unit 9 switches the monitored control unit 10 connected to the satellite line 2 and connects it to the terrestrial exchange line 11.12. As described above, the transmission path of the supervisory control signal is switched from the satellite line 2 where the failure has occurred to the normal terrestrial switched line 11, 12.

When the fault in the satellite line 2 is restored, the switch of the line switching unit 6 is turned to C by the operator of the monitoring station.
When the switch of the line switching unit 7 is switched to the a side and a predetermined PB multiplied signal is sent to the monitored control device 4 by dialing the telephone 5, the monitored control device 4 receives the PB Monitored control device 4 that received the double signal
As a result, the line switching unit 9 switches the monitored control unit 10 connected to the terrestrial exchange line 11.12 and connects it to the satellite line 2. As a result, the transmission path of the supervisory control signal returns to the satellite line 2, which has recovered from the disconnection, and the switching is completed.

In this way, by transmitting line switching information from the monitoring control device 3 of the monitoring station to the PB double signal monitored control device 4,
A dedicated line switching information transmitter becomes unnecessary.

〔Effect of the invention〕

As described above, the present invention has the advantage that a dedicated line switching information transmitter is not required by transmitting line switching information from a monitoring station using a dial signal.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention. 1... Communication satellite, 2... Satellite line, 3
... Monitoring control device, 4 ... Monitored control device, 5 ... Telephone, 6 ... Line switching section, 7 ... Line switching section 9.8...Monitoring control unit, θ/old line switching unit, 10...Monitored control unit, 11, 12...Terrestrial exchange line. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] 1. A monitored and controlled device installed at a first ground station of a satellite line to monitor and control equipment of the first ground station, and a monitored control device installed at a second ground station of the satellite line. and a supervisory control device that remotely monitors and controls the equipment of the first ground station via the monitored and controlled device, the satellite line is used as a transmission path for a supervisory control signal, and the satellite line is In a supervisory control system that uses a terrestrial switched line as a switching backup line, the supervisory control device (A) sends first line switching information and second line switching information to a dial signal when the satellite line is disconnected; (B) after receiving a confirmation signal sent back from the monitored control device indicating that the first line switching information has been received;
a first line switching means for switching a transmission path of a supervisory control signal between the first ground station and the second ground station from the satellite line to the ground switched line, the line switching means being activated; (C) the dial signal transmitting means transmits the second line switching information to the monitored controlled device using a dial signal, and the monitored controlled device (C) transmits the first line switching information and the second line switching information. information via the terrestrial switched line, transmitting the confirmation signal when receiving the first line switching information;
a second line switching means for switching a transmission path for a supervisory control signal between the first ground station and the second ground station from the satellite line to the terrestrial switched line when receiving line switching information; A supervisory control system characterized by: 2. The supervisory control system according to claim 1, wherein the dial signal is a PB signal.