TWI390220B - Power on/off tester for computer - Google Patents

Description

Computer on/off test device

The present invention relates to a test apparatus, and more particularly to a computer on/off test apparatus.

At present, with the rapid development of computer technology, computers have become one of the most important tools for people's daily work. Therefore, the performance of computers will directly affect people's work efficiency, which requires the reliability of computer products before they enter the market. Verification of life, etc., providing reference parameters for the improvement of computer products. In the verification, it is often necessary to compare the computer in the course of its use, and then restore the power supply after the short-term power failure, and carry out computer testing. The traditional analogy method is determined. Manually press the power button of the computer to turn on the computer. After running for a period of time, turn off the mains to turn off the computer, and cycle until the test is completed. This manual method of pressing the power button of the computer requires a lot of manpower.

In view of the above, it is necessary to provide a computer on/off test device that automatically compares the on/off operation of the computer to facilitate testing of the computer.

A computer on/off test device for testing on/off of a computer, comprising a power supply device and a control circuit, the power supply device can periodically supply/disable power to the computer, the control circuit includes a first a second electronic switch, a first and a second resistor, and first and second capacitors. The first end of the first electronic switch is connected to the system power supply of the computer through the first resistor, and is further grounded through the first capacitor. a first end of the second electronic switch is connected to the second end of the first electronic switch, and is connected to the standby power supply of the computer through the second resistor, and is also grounded through the second capacitor, and the second end of the second electronic switch Connected to one of the power-on signal terminals of the computer, the third ends of the first and second electronic switches are grounded, and when the power supply device starts to supply power to the computer, the standby power of the computer passes through the second resistor as the second capacitor Charging, the second electronic switch is turned on, and the power-on signal is triggered to be low, so that the computer is turned on, and after the computer is turned on, the system power supply charges the first capacitor through the first resistor, so that the computer An electronic switch is turned on, the second electronic switch is turned off, so that the power supply signal goes high, the power-down the computer via the power supply means to power off.

The computer on/off test device uses the control circuit to analogize the action of the user to manually press the power on button, and the power supply device can periodically supply/disconnect the power to the computer, so that the computer can be automatically turned off after being turned on, so that the analogy is cyclically The computer's on/off action tests the performance of the computer, which avoids the use of the manual test method of the computer's boot button, saving a lot of manpower.

Referring to FIG. 1 , a preferred embodiment of the computer on/off test device includes an AC adjustable power supply 10 and a control circuit 20 . The AC adjustable power supply 10 is used as a power supply device for connecting a computer to the ATX power supply 30 . The control circuit 20 is configured to connect to the motherboard 40 of the computer, and the AC adjustable power supply 10 can periodically supply/disconnect the ATX power supply 30.

The ATX power supply 30 has a 24 pin power connector 310. The motherboard 40 has a 24 pin power connector 410 and a socket 420. The power connector 310 of the ATX power supply 30 and the power connector 410 of the motherboard 40 are provided. The corresponding power pin is connected, the pin 8 of the socket 420 is grounded, and the pin 6 is used as a power-on signal terminal for connecting the power button of the computer.

The control circuit 20 includes two N-channel MOS type field effect transistors (NMOS transistors) Q1 and Q2, capacitors C1, C2, C3 and resistors R1, R2, R3, and R4 as electronic switches, and the gate of the NMOS transistor Q1. The 5V system power supply pin of the power connector 310 is connected through the resistor R1, that is, 5V_SYS, and the drain is connected to the gate of the NMOS transistor Q2 through the resistor R2. The gate and the drain of the NMOS transistor Q2 are respectively transmitted. The resistors R3 and R4 are connected to the 5V standby power supply pin of the power connector 410, that is, 5V_SB. The drain of the NMOS transistor Q2 is also connected to the pin 6 of the socket 420, and is grounded through the capacitor C3. The NMOS transistor is grounded. The gates of Q1 and Q2 are grounded through the capacitors C1 and C2, respectively, and the sources of the NMOS transistors Q1 and Q2 are grounded.

After the AC adjustable power supply 10 is connected to the ATX power supply 30, the ATX power supply 30 is supplied with a commercial power voltage. The ATX power supply 30 converts the commercial power into a DC power required by the motherboard 40. When the computer is in standby, the ATX power supply 30 is only the motherboard 40. A 5V standby voltage is provided. Generally, when the power-on button is pressed, the pin 6 and the pin 8 of the socket 420 are short-circuited, so that the pin 6 of the socket 420 is at a low level to trigger the computer to start working. In this embodiment, instead of pressing the power on button, the control circuit 20 is analogous to the user pressing the power on button. The 5V standby voltage charges the capacitor C2 through the resistor R3. When the voltage across the capacitor C2 is greater than When the NMOS transistor Q2 is turned on, the NMOS transistor Q2 is turned on, and the NMOS transistor Q2 is at a low level, so that the pin 6 of the socket 420 is at a low level, and the computer is turned on. The ATX power supply 30 provides a 5V system voltage for the motherboard 40. The 5V system voltage charges the capacitor C1 through the resistor R1. When the voltage across the capacitor C1 is greater than the turn-on voltage of the NMOS transistor Q1, the NMOS transistor Q1 is turned on. , the capacitor C2 is transparent The over-resistance R2 is discharged. When the voltage across the capacitor C2 is low, the NMOS transistor Q2 is turned off, and the drain thereof becomes a high level, so that the pin 6 of the socket 420 becomes a high level, which is under the computer. The boot time provides preparation conditions.

The AC adjustable power supply 10 can be set in advance so that the AC adjustable power supply 10 is turned off and reopened cyclically within a certain period. When the AC adjustable power supply 10 is turned off, the AC adjustable power supply 10 stops The ATX power supply 30 is powered. The capacitor C1 is discharged through the resistor R1. When the AC adjustable power supply 10 is turned back on, the AC power supply voltage is again outputted to the ATX power supply 30, so that the computer is turned on and off to test the performance of the computer. It avoids the need to manually turn on/off the button to save manpower.

In other embodiments, the NMOS transistors Q1 and Q2 are respectively replaced by a first and a second NPN-type transistor, and the base, the collector and the emitter of the first transistor are respectively connected to the NMOS. The gate, the drain and the source of the transistor Q1 are connected in the same manner, and the base, the collector and the emitter of the second transistor are connected to the gate, the drain and the source of the NMOS transistor Q2, respectively. The connection modes are the same, and the application principles of the first and second transistors in the computer on/off test device are the same as those of the NMOS transistors Q1 and Q2, respectively, and are not described again.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations in the spirit of the present invention will be apparent to those skilled in the art. All should be covered by the following patent application.

AC adjustable power supply. . . 10

Control circuit. . . 20

NMOS transistor. . . Q1, Q2

capacitance. . . C1~C3

resistance. . . R1~R4

ATX power supply. . . 30

motherboard. . . 40

Power connector. . . 310,410

socket. . . 420

5V system power supply pin. . . 5V_SYS

5V standby power supply pin. . . 5V_SB

1 is a circuit diagram of a preferred embodiment of a computer on/off test device of the present invention.

AC adjustable power supply. . . 10

Control circuit. . . 20

NMOS transistor. . . Q1, Q2

capacitance. . . C1~C3

resistance. . . R1~R4

ATX power supply. . . 30

motherboard. . . 40

Power connector. . . 310,410

socket. . . 420

5V system power supply pin. . . 5V_SYS

5V standby power supply pin. . . 5V_SB

Claims (7)

A computer on/off test device for testing on/off of a computer, comprising a power supply device and a control circuit, the power supply device can periodically supply/disable power to the computer, the control circuit includes a first a second electronic switch, a first and a second resistor, and first and second capacitors. The first end of the first electronic switch is connected to the system power supply of the computer through the first resistor, and is further grounded through the first capacitor. a first end of the second electronic switch is connected to the second end of the first electronic switch, and is connected to the standby power supply of the computer through the second resistor, and is also grounded through the second capacitor, and the second end of the second electronic switch Connected to one of the power-on signal terminals of the computer, the third ends of the first and second electronic switches are grounded, and when the power supply device starts to supply power to the computer, the standby power of the computer passes through the second resistor as the second capacitor Charging, the second electronic switch is turned on, and the power-on signal is triggered to be low, so that the computer is turned on, and after the computer is turned on, the system power supply charges the first capacitor through the first resistor, so that the computer An electronic switch is turned on, the second electronic switch is turned off, so that the power supply signal goes high, the power-down the computer via the power supply means to power off. The computer on/off test device of claim 1, wherein the power supply device is an AC adjustable power supply. The computer on/off test device of claim 1, wherein the computer has a socket on the motherboard, and the power on signal terminal is a pin connected to the power button of the computer. The computer on/off test device of claim 1, wherein the standby power pin and the system power pin are respectively a 5V standby power pin and a 5V system power pin. The computer on/off test device of claim 1, wherein the power supply device supplies power to the computer through an ATX power supply connected to the computer. The computer on/off test device according to claim 1, wherein the first and second electronic switches are N-channel MOS type field effect transistors, and the first, second and third ends thereof are respectively Gate, bungee, source. The computer on/off test device according to claim 1, wherein the first and second electronic switches are NPN type transistors, and the first, second and third ends thereof are bases and sets respectively. Extreme, emitter.