Supervisory and control system

[Detailed Description of the Invention]

[Industrial Application] The present invention relates to a supervision and control system, and relates to the supervision and control system which carries out the intensive surveillance of the equipment of the ground station which constitutes especially satellite connection. [Description of the Prior Art] As a measure when a television picture signal etc. are conventionally transmitted between two or more ground stations using satellite connection and satellite connection becomes disconnection under the influence of device failure, rain, etc., The land-based line was provided as a reserve circuit of satellite connection, when satellite connection became disconnection, the land-based line was used instead of satellite connection, and when the disconnection of satellite connection was restored, it had returned to satellite connection. It is although the supervisor control line as transmission ways, such as a supervisory control signal used with the supervision and control system which supervises equipment, is also usually using satellite connection, When satellite connection was disconnection, in order that a supervisor control line might also perform the change and its reverse change to a land-based line from satellite connection, circuit change control of the supervisor control line was performed. [Problem(s) to be Solved by the Invention] In order that the conventional supervision and control system mentioned above might code the circuit change information on the supervisor control line which the operator of the surveillance ground station inputted at the time of satellite disconnection, might modulate and might transmit to a monitor station, there was a problem that the circuit change information transmission section of a supervisor control line for exclusive use was required. The object of the present invention solves the above-mentioned problem, and there is in providing the supervision and control system which made the circuit change information transmission section unnecessary. [Means for solving problem] A monitored control device which the supervision and control system of the present invention is installed in the 1st ground station of satellite connection, and performs supervisor control of the apparatus of the 1st above-mentioned ground station, It is installed in the 2nd ground station of the above-mentioned satellite connection, and is the distant place supervisor control of the apparatus of the 1st above-mentioned ground station, In the supervision and control system which is provided with the monitor and control performed via the above-mentioned monitored control device, uses the above-mentioned satellite connection as a transmission way of a supervisory control signal, and uses a ground switched line as a change reserve circuit of the above-mentioned satellite connection, The dial signal transmission medium by which the above-mentioned monitor and control transmits the 1st circuit change information and the 2nd circuit change information to the above-mentioned monitored control device with a dial signal when the (A) above-mentioned satellite connection becomes Disconnect, (B) After receiving the acknowledge signal which shows that the 1st above-mentioned circuit change information returned from the above-mentioned monitored control device was received, The 1st circuit switching means that changes the transmission way of the supervisory control signal between the 1st above-mentioned ground station and the 2nd above-mentioned ground station from the above-mentioned satellite connection to the above-mentioned ground switched line, When a preparation and the above-mentioned circuit switching means operate, by the above-mentioned dial signal transmission medium, the 2nd circuit change information is transmitted to the above-mentioned monitored control device with a dial signal, and the above-mentioned monitored control device, (C) The 1st above-mentioned circuit change information and the 2nd circuit change information are received via the above-mentioned ground switched line, When the 1st above-mentioned circuit change information was received, the above-mentioned acknowledge signal was transmitted, and when the 2nd above-mentioned circuit change information is received, it has the 2nd circuit switching means that changes the transmission way of the supervisory control signal between the 1st above-mentioned ground station and the 2nd above-mentioned ground station from the above-mentioned satellite connection to the above-mentioned ground switched line. [Example] Next, the example of the present invention is described with reference to drawings. Drawing 1 is a block diagram of one example of the present invention. The supervision and control system shown in Drawing 1 comprises monitored control device 4 installed in the monitor station (the 1st ground station) via monitor and control 3 installed in the monitor station (the 2nd ground station) which is a ground station of the end of satellite connection 2, satellite connection 2, and ground switched line 11.12. Monitor and control 3 is returned from telephone (PB signal transmission medium) 5 and monitored control device 4 which transmit the 1st circuit change information and the 2nd circuit change information to monitored control device 4 with a signal dial signal PB time from a monitor station, when satellite connection 2 becomes Disconnect, It comprises circuit switching parts (1st circuit switching means) 6 and 7 which change the transmission way of the supervisory control signal between monitor stations from satellite connection 2 to ground switched line 11.12, and supervisor control part 8 which has a distant place supervisor control function after receiving the acknowledge signal which shows that the 1st circuit change information was received. When monitored control device 4 transmits an acknowledge signal when the 1st circuit change information and the 2nd circuit change information are received via ground switched line 11*12 and the 1st circuit change information is received, and the 2nd circuit change information is received, It comprises circuit switching part (2nd circuit switching means) 9 which changes the transmission way of the supervisory control signal between monitor stations from satellite connection 2 to ground switched line 11.12, and monitored control part 10 which has a supervisor control function. Next, operation is explained. Dial control of telephone 5 of monitor and control 3 by the operator of a monitor station when satellite connection 2 which passed communications satellite 1 under "influence of rain becomes disconnection in Drawing 1, As for circuit switching part 9 of monitored control device 4 which received the circuit change information on PB time signal 1st sent out to monitored control device 4, Toward returns a mail arrival tone (acknowledge signal) to monitor and control 3. And dial control of telephone 5 by the operator of the center side which checked this mail arrival tone, while sending out the circuit change information on PB double signal 2nd defined beforehand -- manual operation -- the switch of circuit switching part 7 -- the b side -- the switch of circuit switching part 6 is changed to the d side, and supervisor control part 8 is connected to ground switched line 11.12. In monitored control device 4, if signal reception is carried out PB time, circuit switching part 9 will change monitored control part 10 connected to satellite connection 2, and will connect with the ground switched line 11.12 side. The transmission way of a supervisory control signal is changed from satellite connection 2 which the obstacle generated to normal ground switched line 11.12 above. And when the obstacle of satellite connection 2 is restored, it is operation of the operator of a monitor station, The switch of circuit switching part 6 is changed to the C side, and the switch of circuit switching part 7 is changed to the a side, and it is the dial control of telephone 5, If sent out to PB time signal monitored control device 4 defined beforehand, in monitored control device 4, with monitored control device 4 which carried out signal reception PB time, circuit switching part 9 will change monitored control part 10 connected to ground switched line 11.12, and will connect with satellite connection 2. By this, the transmission way of a supervisory control signal returns to satellite connection 2 which disconnection recovered, and a change is completed. Thus, a circuit change information transmission section for exclusive use becomes unnecessary by transmitting circuit change information to signal monitored control device 4 PB time from monitor and control 3 of a monitor station. [Effect of the Invention] As explained above, in the present invention, circuit change information is transmitted by a dial signal from a monitor station. Therefore, an effect that a circuit change information transmission section for exclusive use becomes unnecessary is consisted.

[Brief Description of the Drawings]

Drawing 1 is a system configuration figure of one example of the present invention. 1 ...... A communications satellite, 2 ...... Satellite connection, 3 ...... monitor and control and 4 ...... a monitored control device and 5 ...... telephone and 6 ...... a circuit switching part and 7 ... business -- Circuit switching part 9.8 ...... a supervisor control part, and theta and old things .. a circuit switching part and 10 ...... a monitored control part, and 11 and 12 ...... a ground switched line. Representative Patent attorney Susumu Uchihara