JPS6226520A - Power source control system for terminal system - Google Patents

Abstract

PURPOSE:To control turn-on/turn-off of a power source without providing a control line, by sending out a turn-on/turn-off control signal by superposing it on a power source cord which is connected between a terminal equipment and a convenience outlet box, when sending said signal from the terminal equipment to the convenience outlet box. CONSTITUTION:A terminal equipment 1 is provided with a terminal power source circuit 8 and a device interface part 9, and also constituted by adding a power source control signal generating circuit 22 and a signal superposing circuit 25. Also, a convenience outlet box (power source control mechanism) 15 is constituted of a power source switching circuit 19, a signal detecting circuit 26 and a signal decoding circuit 28, and also, devices 2, 3 are connected to the convenience outlet box 15 and the terminal equipment 1 by power source codes 13, 14 and signal cables 10, 11. In such a state, the signal generating circuit 22 is controlled by a control program and sends out a control signal of turn-on/turn-off of a device power source. This signal is sent to the convenience outlet box 15 from a power source. This signal is sent to the convenience outlet box 15 from a power source cord 12, as a high frequency component by the signal superposing circuit 25, and a power source switch of the devices 2, 3 is turned on and off.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a terminal system consisting of a terminal device and one or more devices connected to the terminal device, and particularly to a terminal system that is configured to use power on/off instructions for the terminal device.

This invention relates to a power control method that automatically controls power on/off of devices.

[Background of the invention]

A conventional power supply control method for a terminal system will be explained with reference to FIGS. 3 and 4. In FIG. 3, the terminal device l has a built-in power supply control mechanism 4, and the power received through the power cord 12 is passed through the power supply control mechanism 4 to the power supply circuit 8 in the terminal device 1 through the internal power line 6. and the devices 2, 3 via the power cords 13, 14. In this case, the terminal bag W11 is connected to the power supply control mechanism 4 via the signal line 5 by the power supply control logic section 7 managed by a program.
Instructs to turn on/off the power of its own power supply circuit 8 and devices 2 and 3. Terminal device 1 and devices 2 and 3
The data etc. between the two are transmitted via the device interface 9 and signal cables 10 and 11.

By the way, as shown in FIG.
In the case of a configuration in which the terminal device 1 is built in, it is necessary to prepare as many outlets in the terminal device 1 as the number of devices connected to the terminal device 1, and the design is such that the total power supply capacity to be turned on/off is satisfied from the beginning. There are physical and cost issues.

Therefore, there is a system in which the power control mechanism 4 is provided as an outlet box outside the terminal device M1, and a single power cord is used between the terminal device 1 and the outlet box. However, in this case, the terminal device instructs the external outlet box to perform the power on/off sequence as shown in FIG.

It was necessary to provide a control line in addition to the power cord between the terminal device II and the outlet box.

In addition, as a power control method for the terminal system.

For example, there is Japanese Unexamined Patent Publication No. 52-38835.

This involves preparing a mask terminal and separately providing a power control line between it and other terminals for control, and essentially providing a control line in addition to the power cord between the terminal device and the outlet box. The same is true for

[Purpose of the invention]

An object of the present invention is to provide a terminal system in which a power control mechanism is provided as an outlet box outside a terminal device, and the outlet box supplies power to a device, without providing a control line separate from the power cord between the terminal device and the outlet box. The object of the present invention is to enable a terminal device to instruct a power supply on/off sequence operation to an outlet box.

[Summary of the invention]

The present invention is applicable to a case where a terminal device sends a power on/off control signal to an outlet box in order to control power on/off of a device power supply system (slave outlet) of an external outlet box.

It is sent out by folding it into the power cord connected between the terminal device and the outlet box. - The outlet box detects and decodes the signal component of the power cord to turn on/off the power supply system for the device.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows a configuration diagram of an embodiment of a terminal system according to the present invention. In FIG. 1, a device 2.3 is connected to the terminal device 1 via a signal cable 10.11. A power supply control mechanism (outlet box) 15 is externally attached to the terminal device 1 and connected to an external power supply via a power cord 16. The terminal device 1 is connected to the mask outlet (terminal power supply outlet) of the outlet box 15 by the power cord 12.
° connected to. Power cord 13 for devices 2 and 3
．． 14 is connected to a slave outlet (device power supply outlet) of the outlet box 15. The terminal device 1 has a terminal power supply circuit 8. Device interface section 9
In addition, a power supply control signal generation circuit 22 and a signal superposition circuit 25
The 6-outlet box 15 is equipped with a power switch circuit 19, a signal detection circuit 26, and a signal decoding circuit 28.

Next, power on/off operations in the terminal system will be explained with reference to FIG.

When the terminal device 1 receives an instruction to turn on the power from an operator or by remote control, a control program is started. Generally, the terminal device 1 is equipped with the minimum necessary power supply for this purpose. The power supply control signal generation circuit 22 in the terminal device 1 is controlled by a control program, one of which turns on the terminal'tag circuit 8 through the signal line 23, and the other which turns on the terminal 'tag circuit 8 through the signal line 23.
A device power-on control signal is sent to 4. This control signal is superimposed on the power cord 12 as a high frequency component by the signal superposition circuit 25 and sent to the outlet box 15 . In the outlet box 15, a device power-on control signal issued from the terminal device 1 through the power cord 12 is detected by a signal detection circuit 26, and is applied to a signal decoder circuit (decoder) 28 via a line 27 to be decoded. .

As a result, the signal decoding circuit 28 causes the power switch circuit 19 to
In response, a device power-on signal is applied via the signal line 29, and in response to this, the power switch circuit 19 turns on the power switches of the devices 2 and 3.

On the other hand, upon receiving an instruction to turn off the power, the control program of the terminal device 1 executes the following command:
Instructs the power supply control signal generation circuit 22 to generate a device power-off control signal.

The device power cut-off control signal generated by the power control signal generation circuit 22 is superimposed on the cord 12 by the signal superposition circuit 25 and sent to the outlet box 15 . In the outlet box 15.

When the device power-off control signal is detected by the signal detection circuit 26 and decoded by the signal decoding circuit 28, the device power-off signal is applied to the power switch circuit 19, and the device 2
, 3 are turned off. The control program for the terminal device 1 instructs the power control signal regeneration circuit 22 to generate a power-off control signal for the terminal device 1 after a certain period of time after instructing to turn off the device power. This power cut-off control signal is applied to the terminal power supply circuit 28 through the signal line 23, and the terminal power supply circuit 8 is turned off.

〔Effect of the invention〕

According to the present invention, when an outlet box is installed outside a terminal device, the power to the outlet box can be turned on and off from the terminal device at will without providing a control line separate from the power cord between the terminal device and the outlet box. It becomes possible to control.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of FIG. 1, FIG. 3 is a diagram showing a conventional configuration example, and FIG. FIG. 3 is a diagram for explaining the operation. l...terminal device, 2,3...device, 8...
・Terminal power supply circuit, 12, 13, 14. 16... Power cord, 15... Power control mechanism (outlet box), 19... Power switch circuit, 22...
・Power control signal generation circuit, 25... signal convolution circuit,
26... Signal detection circuit, 28... Signal decoding circuit. Figure 1 Figure 2

Claims (1)

[Claims] (1) A terminal system that includes a terminal device and a device that is connected to the terminal device and performs data input/output, a power control mechanism is provided outside the terminal device, and the power control mechanism supplies power to the terminal device and the device. , the terminal device sends a device power on/off control signal to the power control mechanism using the power line between the terminal device and the power control mechanism, and upon receiving the control signal, the power control mechanism A power control method for a terminal system characterized by controlling device power on/off.