JPH08191488A - Signal transmission method - Google Patents

Abstract

PURPOSE: To reduce the output of a transmission amplifier and to decrease a power supply circuit current in an equipment using a power distribution line and a communication exclusive line as communication media for sending/ receiving signals. CONSTITUTION: An instruction signal froth a master station 1 is sent/received between controllers 4, 5 and the master station 1 via a master station coupler 2 and slave station high voltage couplers 6, 7, 8, 9 to operate switches 11, 12 installed on the distribution line or to recognize the state. In this case, two wave signals of low and high groups are not simultaneously superimposed but divided timewise and sent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote controller for transmitting and receiving signals using a distribution line or a dedicated line for signal transmission as a transmission line, and its master station.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. Incidentally, FIGS. 3, 4 and 5 are schematic diagrams of a dedicated line carrying method, a distribution line carrying method, and a carrier wave carried by both methods. Conventionally, as shown in FIGS. 3 and 4, the master station 1
The carrier wave transmitted from 3 is transmitted to the controller 15 or 16 through the distribution line 17 or the communication dedicated line 14. The switches 18 and 19 and the controllers 15 and 16 are functionally the same, but the controller is given a number for identifying the controller called an address. The same master station 13 as the controllers 15 and 16
The numbers of the addresses must be different between the controllers 15 and 16 having the same. Therefore, as shown in FIGS. 3 and 4, it is possible to attach a plurality of controllers 15 and 16 to one distribution line or dedicated communication line 14.
Since a signal for specifying the controller is given to the signal to be carried, a plurality of controllers do not operate at the same time. In each of the controllers 15 and 16, when the received signal is demodulated and a signal indicating its own address is included in the carrier wave, the operation of the switches 18 and 19 is determined according to the instruction included in the signal, and the respective control is performed. The switch is operated in a one-to-one correspondence with the switch. This operation enables switching and opening / closing of the distribution line 17. After that, each controller 15, 16
Respectively carry signals to the master station 13 in order to convey the status of the switches 18, 19 or the status of the controller itself to the master station 13. There is an error in the signal transmission between the master station 13 and the controllers 15 and 16 in order to quickly operate the switches 18 and 19 without error in view of the current state of use of electricity, which is not allowed even for a momentary power failure. It shouldn't be. However, in the signal transmission method using the distribution line 17 as a communication medium,
Compared to the communication dedicated line 14, there is a high possibility that the signal will not be transmitted well due to noise or standing waves. Even when a dedicated communication line is used, the signals of the low-group and high-group two waves are used for the purpose of improving the compatibility and the reliability of the controller master station which uses the distribution line as the transmission line, and at the same time improve the reliability. Are sending and receiving. Conventionally, these two waves are superimposed and transmitted as shown in the explanatory diagram of FIG.

[0003]

However, when the conventional method is used, the carrier signals of the low group and high group two waves are superposed, so that a power amplifier of relatively high power must be used. This leads to an increase in the size of the power supply unit and, in turn, an increase in the size of the entire device, which is a cause of disadvantage in terms of cost. Moreover, since the two waves are superimposed and transmitted and received, the signal carrier section and the receiving section on the transmitting side and the receiving side inevitably have to be complicated. Therefore, it is an object of the present invention to provide a power supply unit with a smaller size, lower power consumption of a power amplifier, and smaller size and lower cost of a device.

[0004]

According to the present invention, as means for solving the above problems, signals are transmitted in order of a low group and a high group without simultaneously superimposing signals as shown in the explanatory diagram of FIG.
That is, in the conventional method, one carrier is used to superimpose signals of two waves of the low group and the high group to simultaneously transmit and receive, and then the signals are first divided into the low group and then the high group to be sequentially transmitted. Let's do it. However, in the explanatory view of FIG. 2, an example in which the low group and the high group are carried in order has been described, but there is no problem if the high group and the low group are carried in that order.

[0005]

In the above structure, since it is not necessary to superimpose two waves, the peak power of signal carrier can be reduced, so that the carrier unit and the power supply unit can be simplified. Therefore, it is possible to improve the drawbacks of the conventional signal transmission, and at the same time, since the voltage of the signal can be suppressed low, it is also possible to reduce the filter passing power of the high voltage coupler that connects the distribution line and the signal transmitting / receiving unit. Become.

[0006]

EXAMPLE An example in which a distribution line is used as a signal transmission line will be described with reference to FIGS. 1 and 2 are schematic diagrams of a distribution line carrying method and a carrier wave used in the present invention. First, the difference from the conventional one is that the master station 1, the master station coupler 2, the slave station high-voltage couplers 6 to 9, and the controllers 4 and 5 are changed to devices using the method of the present invention. Therefore,
The on-site transformer 3, the distribution line 10, and the switches 11 and 12 can be used without changing from the conventional ones. Therefore, it is considered to be relatively easy to implement without the need for expensive expenditure. An embodiment will be described based on the above. First, the carrier wave is the master station 1 as shown in FIG.
From the low group to the high group, they are temporally divided and sent to the master station high-voltage coupler 2 and then to the distribution line 10. This signal is transmitted to the controller 4 or 5 through the slave station high-voltage couplers 6 to 9. As in the conventional method, an address is assigned to each of the controllers 4 and 5 to determine whether or not the transmitted signal includes its own address. The vessels 11 and 12 are operated. After that, the switches 11, 12 or the controller 4,
The state 5 is transmitted to the master station 1 in the opposite direction to the above procedure. The master station 1 receives the results sent from the controllers 4 and 5 and determines whether the result is normal or abnormal. The transformer 3 is a transformer in the substation, and the master station 1, the master station coupler 2,
The on-site transformer 3 is usually installed in the substation.

[0007]

According to the present invention, it is possible to reduce the power used in the signal carrier section and the receiver section of the master station and the controller, and to compare the signal from the carrier wave with the conventional method in which two waves are superposed. Since the power amplifier can be easily taken out, the power amplifier can be downsized, the power consumption can be reduced, and the transport unit, the receiving unit, and the entire device can be downsized and the cost can be reduced. At the same time, since the electric power passing through the high voltage coupler that connects the master station and the controller to the distribution line can be reduced, the high voltage coupler can be downsized and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a signal transmission method of the present invention.

FIG. 3 is a circuit diagram showing an example of a conventional dedicated line carrying method.

FIG. 4 is a circuit diagram showing an example of a conventional distribution line transportation method.

FIG. 5 is an explanatory diagram of a conventional signal transmission method.

[Explanation of symbols]

 1 Master station 2 Master station coupler 3 In-house transformer 4, 5 Controller 6, 7, 8, 9 Slave station high-voltage coupler 10 Distribution line 11, 12 Switch

Claims (1)

[Claims] 1. A remote controller that transmits and receives a signal for controlling a distribution switch that opens and closes the distribution line by using the distribution line or a dedicated line used mainly for signal transmission, and a master station of the remote controller. And a slave station, and a signal transmission method for temporally dividing the signal to be mutually carried into two signals of a low group and a high group and sequentially transmitting the signals.