JPS63300309A - Power supply interrupter for electronic computer - Google Patents

Abstract

PURPOSE:To save the man-hour of the operation of an electronic computer or to attain the unattended operation by providing a 1st switch and a 2nd switch turned off by a command signal outputted from an electronic computer based on the program after the end of prescribed processing between the power supply and the electronic computer. CONSTITUTION:Since the 1st switch 5 and the 2nd switch 6 are provided in parallel between the power supply 2 and the electronic computer 1, when the operator turns manually on the 1st switch 5, the power is always supplied to the electronic computer 1 independently of the on/off of the 2nd switch 6. By turning off the 1st switch 5 and turning on the 2nd switch 6, a command signal is outputted from the electronic computer 1 based on the program when a prescribed time elapses after the electronic computer completes a prescribed processing, and the command signal causes the 2nd switch 6 to turn off thereby automatically disconnecting the power to the electronic computer 1.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a power cutoff device for a computer that can automatically turn off the power after a predetermined processing of the computer is completed.

<Prior Art> Conventionally, a computer is powered on by an operator confirming that the computer has completed a predetermined process and then manually turning off the power switch.

<Problems to be solved by the invention> For this reason, in conventional electronic computers, when long calculation processing continues until late at night, an operator must remain present until the processing is completed in order to turn off the power. This method has the drawbacks of placing a heavy burden on the operator and not being able to save on manpower.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a power cutoff device for a computer that can automatically turn off the power after a predetermined amount of time has elapsed from the end of a predetermined process, thereby reducing the burden on the operator and saving manpower. It is to provide.

Means for Solving the Problems> In order to achieve the above object, the computer power cutoff device of the present invention includes a first switch for turning off the power provided between the power source and the computer; , a first switch that is provided in parallel with the first switch between the power supply and the computer, and is turned off by a command signal output from the computer after a predetermined process is completed based on the program of the computer. 2 switches.

<Function> Since a first switch and a second switch are provided in parallel between the power supply and the computer, when the operator manually turns on the first switch, the second switch turns on. Power is always supplied to the computer regardless of whether it is on or off. Furthermore, if the first switch is turned off and the second switch is turned on, a command signal is sent from the computer based on the program when a predetermined period of time has elapsed after the computer finishes a predetermined process. This command signal turns off the second switch and automatically turns off the computer.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 is a circuit diagram showing one embodiment of the power cutoff device of the present invention, l is a computer, 2 is a power source that supplies power to this computer l, and 3 is this power supply 2 and the computer l.
Is this the power supply line that connects 4? A manual main switch provided in l1i13, 5 a manual first switch provided on the computer side of the main switch 4 of the power supply line 3, and 6 a manual first switch provided in the power supply line 3 in parallel with the first switch 5; command signal S output from the computer 1
.

The second switch 7 is turned off by the power supply line 3
This bypass switch is provided in parallel with the first switch 5 and is turned off by a power-off permission signal S2 output from the computer 1.

The command signal S1 for turning off the second switch 6 is issued to the computer when the time value of the software timer, which starts measuring time based on a program at the same time as the completion of a predetermined calculation process, reaches a predetermined setting value. It is designed to be output from l.

Further, the power-off permission signal S, which turns off the bypass switch 7, is controlled by the program of the computer 1, and is output from the computer 1 only when turning off the power does not affect the process. 7 is
It serves as a power backup when the first switch 5 is turned off by mistake.

The operation of the power cutoff device having the above configuration will be described below.

First, turn on the computer ■ by manually turning on the main switch 4.
By turning off, the power supply from the power source 2 is cut off. Therefore, when the computer 1 completes a predetermined process while the operator is present, the operator only has to manually turn off the main switch 4 to turn off the power. Next, considering the case where the main switch 4 is on, the computer l outputs a power-off permission signal S for a certain period of time to the bypass switch 7 every time it completes a predetermined process, and the bypass switch 7 is thereby turned off. As a result, a power-off permission state is entered, that is, a state in which the first and second switches 5.6 interposed in the power supply line 3 are activated. Furthermore, unless the power-off permission signal St is output, the bypass switch 7 remains on, and the power supply 2 is supplied to the computer 1 through it, so if the operator accidentally turns off the first switch 5, the bypass switch 7 remains on. power outage is also prevented. If the operator manually turns on the first switch 5 in the power-off permission state in which the bypass switch 7 is turned off, the computer is connected to the computer via this switch. If the first switch 5 is manually turned off while the power supply 2 is constantly supplied to the switch, the second switch 6 will be activated. That is, the power 2 is supplied to the computer l via the second switch 6, which is normally on, and the computer! Simultaneously with the completion of the final arithmetic processing, the software timer starts measuring time, and when this time value reaches the set value, the m-order signal S1 is outputted from the computer 1 to the second switch 6. As a result, the second switch 6 is turned off, the power supply 2 is turned off regardless of whether the main switch 4 is on or off, and the computer I is stopped.

FIG. 2 is a flowchart showing an example of the operation of the power cutoff device. In the figure, in step S1, while the computer 1 is performing a predetermined process, the power-off permission signal S is not output, so the bypass switch 7 is in the on state. Next, in step S2, the operator manually turns off the first switch 5 to enable the program-based automatic power-off function. The computer l is supplied with power via the second switch 6 which is in the on state, and in step S3, when a predetermined process is completed, a power-off permission signal S is sent.

After is output, a software timer counts a predetermined set time, and when the time count ends, a command signal S1 is output. Next, in step S4, the power-off permission signal S,
As a result, the bypass switch 7 is turned off, and at the same time, in step S5, the second switch 6 is turned off in response to the command signal SI, the power supply from the power supply 2 to the computer l is cut off, and the computer l is stopped.

In this way, if the operator needs to leave the computer while the computer is running, the operator can leave the main switch 4 on and turn off the first switch 5. After a set time has elapsed from the end of the predetermined processing, the second switch 6 is turned off by the software timer, and the power supply 2 can be automatically turned off, and by changing the set time, the timing of power-off can be arbitrarily selected. Therefore, it is not necessary for the operator to remain at the computer until the processing is completed as in the past, and the burden on the operator can be significantly reduced, making it possible to save labor or operate unmanned.

In the above embodiment, since the bypass switch 7, which is turned off by the power-off permission signal St output from the computer 1, is provided in the power supply line 3 in parallel with the first switch 5, power supply due to erroneous operation of the first switch 5 is It is possible to prevent disconnection.

<Effects of the Invention> As is clear from the above description, the computer power cutoff device of the present invention includes a first switch between the power source and the computer, and a power cutoff device for shutting down the electronic computer based on a program after a predetermined process is completed. A second switch that is turned off by a command signal output from the computer is installed in parallel, so when the first switch is turned off, the second switch automatically turns off the power after the specified processing is completed. This can significantly reduce the burden on the operator associated with manual power-off, and also enables labor-saving or unmanned computer operation.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the power cutoff device of the present invention, and FIG. 2 is a flowchart showing an example of the operation of the above embodiment. l... Computer, 2... Power supply, 3... Power supply line, 4... Main switch, 5... First switch, 6
...Second switch, 7...Bypass switch, Sl
...Command signal, S, ...Power-off permission signal. Patent applicant: Sharp Corporation Agent
Patent attorney Aoyama Aoyama and 2 others Figure 2

Claims (1)

[Claims] (1) A first switch for turning off the power provided between the power source and the computer, and a first switch provided in parallel with the first switch between the power source and the computer, and a program for the computer; and a second switch that is turned off by a command signal output from the computer after completion of a predetermined process.