CN101329593A

CN101329593A - Computer system AC power supply control device using host power supply switch and battery

Info

Publication number: CN101329593A
Application number: CNA2008101348488A
Authority: CN
Inventors: 温雅宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-04
Filing date: 2008-08-04
Publication date: 2008-12-24
Also published as: WO2010015141A1

Abstract

An AC power control device for computer system using host power switch and battery. The computer system AC power supply is automatically cut off after the desktop computer host is shut down. The defects that the existing control device is inconvenient to use, has poor long-term safety, influences the original appearance of a computer host and has wrong on-off sequence of the peripheral of the host are overcome. The power switch of the computer host provides a trigger signal for the control device, the control device recovers the normal operation of the power switch of the computer host after the computer host is started, and the control device is supplied with power by the battery for a long time. When the computer system is in a full power-off state, the control device is triggered by the power switch of the computer host to switch on the alternating current power supply of the computer system, the peripheral supplies power, the computer host is started in a delayed mode, the normal operation of the power switch of the computer host is recovered in the power-on state of the computer host, the alternating current power supply of the computer system is automatically cut off in a delayed mode after the computer host is shut down, and the system is completely powered off. The device is a universal alternating current power supply control device of a computer system and is suitable for the current common mainstream desktop computer.

Description

Computer system AC power supply controller using host power switch and battery

Technical Field

The invention relates to a control device for automatically turning off an alternating current power supply of a computer system after a desktop computer host is turned off.

Background

At present, computer systems are widely used in various aspects of social life, and after a computer system is shut down, various conventional desktop computer system ac power supply control devices are produced for the purposes of saving energy, preventing electrical fire and prolonging the service life of equipment, and can automatically shut off the ac power supply of a computer peripheral after a computer host is shut down. The existing various desktop computer system AC power supply control devices have some defects while generating positive social effects: the new operation mode is used, so that the normal use habit of an operator when starting, closing and using a computer is changed, and the use is inconvenient; the control device can not automatically disconnect the alternating current power supply of the computer host and the device, so that the long-term safety of the device is poor; the front panel of the computer needs to be modified, so that the original appearance of the computer host is influenced; the principle that the peripheral is firstly turned on, then the host is turned off and then the peripheral is turned off is violated when the computer system is turned on and off, so that the data interface between the host and the peripheral generates harmful current impact to increase the failure rate of the computer and generate harmful influence on the computer. Via a patent search on the national intellectual property office network, a "people's republic of china/public (bulletin) number: CN 201075196/publication (announcement) day: the 2008.06.18 patent document is closer to the invention, but the control device of the invention cannot automatically disconnect the alternating current power supply, so that the long-term safety is poor; via a patent search on the national intellectual property office network, a "people's republic of china/public (bulletin) number: CN 201021987/published (announcement) day: 2008.02.13 is closer to the invention, but the control device needs to be specially operated, so that the use is inconvenient; via a patent search on the national intellectual property office network, a "people's republic of china/public (bulletin) number: CN 200987067/published (announcement) day: 2007.12.05 is close to the present invention, but when it is installed on a general computer, it will affect the original appearance of the computer host; via a patent search on the national intellectual property office network, a "people's republic of china/public (bulletin) number: CN 2838024/public (announcement) day: the 2006.11.15 patent document is closer to the invention, but the synchronous on-off of the peripheral of the host computer has harmful influence on the computer. At present, computer systems are home appliance products, most of the personnel using computers are ordinary personnel, the requirements on computer hosts, external equipment and auxiliary electrical appliances are no longer simple functional requirements, but humanized design is required, the requirements on easy use, safety and appearance characteristics are high, and harmful influence on computers cannot be generated, and the defects of the alternating current power supply control device of the existing computer system directly influence the public recognition of the computer system.

Disclosure of Invention

The invention provides an AC power supply control device suitable for a common desktop computer system, which is simple and convenient to use, has stronger safety, does not influence the original appearance of a computer host, and follows the principle that when the computer system is started and stopped, a peripheral device is firstly started, then the host device is started, the host device is firstly closed, and then the peripheral device is closed. The device is a universal alternating current power supply control device of a computer system and is suitable for the current common mainstream desktop computers.

The technical scheme adopted by the invention for solving the technical problem is as follows:

(1) the technical scheme main points of device: the power switch of the computer host provides a trigger signal for the control device, the control device recovers the normal operation of the power switch of the computer host after the computer host is started, and the control device is supplied with power by the battery for a long time.

When the computer host is in the off state of the alternating current power supply, the power switch of the computer host is invalid, when the computer system is in the full power-off state, the control device needs a switch to provide a manual trigger signal for the computer host before the computer is started, and when the computer host is in the on state, the power switch of the computer host has the normal function, and the control device does not need to carry out manual operation at the moment, so the time sequence of the use of the power switch of the computer host and the manual trigger switch of the control device is not conflicted; by utilizing the characteristic, the two functions are combined into one, and one switch can have two functions in different time periods of one working cycle of the computer; the power switch of the computer host is a component designed integrally with the computer case, the appearance and the use convenience degree of the power switch of the computer host are incomparable with those of modified equipment, and the power switch of the computer host provides a trigger signal for the control device and has strong structural advantages.

When the computer host is in a startup state, the host power switch has an irreplaceable function of a computer operating system, before the computer is started to load the operating system, the host power switch can control the power monitoring part of the computer mainboard to execute point-press shutdown or long-press forced shutdown, after the computer operating system is loaded, the host power switch can perform point-press operation set by the operating system or long-press control the power monitoring part of the computer mainboard to execute forced shutdown operation, and in order to not influence the normal use of the computer, the control device must recover the normal operation of the host power switch after the computer host is started; the device can adopt a general gate circuit, a single chip microcomputer or a customized special integrated circuit to complete logic operation.

In the device, a power switch of a computer host provides a trigger signal for the control device, the control device is in a state of being possibly used at any time, the control device needs a power supply to supply power for the control device for a long time, if the control device uses an alternating current power supply, the device can not cut off the self alternating current power supply, if the alternating current power supply is manually switched on, the device loses the basic meaning of automatic control, and therefore, the device adopts a battery long-term power supply mode; when the circuit adopts micro-power design, the service life of the battery can reach the normal service life of the computer host; in general electronic equipment, a battery is used for providing a real-time clock, facilitating movement and information storage and serving as a backup power supply, and the device is a fixed power supply control device but adopts a battery power supply mode, so that the safety of long-term operation of the device is improved; the batteries in the device can adopt one or more batteries according to different specific circuit designs.

(2) The device is formed and connected as follows: the device consists of a main controller, a baffle type connector and a controlled power socket, and the battery can be arranged in the main controller or can be arranged as an independent component for replacing the battery conveniently. The standard connection mode of the computer host power switch is that the power switch is inserted into the input port of the mainboard power switch, and the power switch is disconnected when the device is used; the main controller is supplied with power by a battery for a long time and is responsible for logic control of a circuit, four ports of the main controller are connected with an external circuit, two ports are input ports, one port is a host power switch input port and is connected with a computer host power switch, the other port is a main power input port and is connected with a main power output port of a computer host, the grounding end of the main controller is also connected with the grounding end of the computer host through the main power input port, the main controller is provided with two output ports, one output port is a controlled power switch switching port and is connected with a main board power switch input port of the computer host, and the other output port is a relay control port and is connected with a driving coil of a relay arranged in the controlled power socket; the controlled power socket is a multi-position alternating current power socket which is formed by combining a plurality of single sockets and internally provided with a relay, and the main controller controls an alternating current power supply of the computer system through the relay which is arranged in the controlled power socket; the baffle type connector is a computer expansion slot baffle provided with a connector, is arranged at the rear part of a computer case and is provided with an idle expansion slot baffle position, provides an electrical connection channel which runs through the inside and the outside of a computer host for a control device, can be arranged inside the computer host or outside the computer host, leads out a relay control port of the main controller when the main controller adopts a built-in mode and is connected with a drive coil of a built-in relay of a controlled power socket, and leads out a host power switch, a mainboard power switch input port and a main power supply of a computer when the main controller adopts an external mode and is connected with the main controller. The basic components and connections of the device can be separated and combined according to different specific designs.

(3) The working process of the device is as follows: in order to distinguish from the standby operating state of the computer operating system, the states of the computer host in which the ac power is turned on, the auxiliary power is generated, but the main power is turned off, and the host is turned off are referred to as the standby operating state in this specification. The power-off state of the computer system is taken as an initial state, at the moment, an alternating current power switch of each peripheral of the computer system is in a closed position, a computer host power switch provides a manual trigger signal for the control device, and a main power supply provides a computer host startup state detection signal for the control device; when a power switch of a computer host is pressed, a host power switch input port of a main controller obtains a signal, a main power supply of a computer is not generated at the moment, the main controller processes the input signal, a relay built in a controlled power socket is driven to be closed by a relay control port, alternating current power supplies of the computer host and peripheral equipment of the computer system are switched on, the peripheral equipment of the computer system is directly started, the computer host enters a standby working state and is delayed for a set time so that the peripheral equipment of the computer system enters a stable working state, a controlled power switch switching port of the main controller outputs a starting signal which is sent to a main board power switch input port to start the computer host, and the starting process of a control device is finished; in the computer host startup state, a main power supply is generated, the main controller takes the main power supply as a computer host startup state detection signal for processing, during the existence period of the computer main power supply, a computer host power switch restores the control of a computer mainboard power switch input port through a host power switch input port and a controlled power switch switching port of the main controller, thereby restoring the normal operation of the host power switch in the computer startup state, and in the computer startup state, the host power switch can be pressed for a point or long time in addition to the normal soft shutdown operation of the computer; when the computer is shut down, the computer host returns to the standby state after the shutdown process is executed, the main power supply loses power, the main controller performs logic processing on the standby state, the relay arranged in the controlled power socket is released after a set time delay, the alternating current power supply of the computer system is completely disconnected, the control device is restored to the initial state, and the peripheral devices do not need to be shut down.

The invention has the beneficial effects that: the invention has the common beneficial effect of the AC power supply control device of the existing desktop computer system, saves electric energy, prevents electrical fire and prolongs the service life of equipment. Due to the structural characteristics, the invention also has the following beneficial effects: the control device is operated the same as the computer when starting, under the state that the alternating current power supply is totally cut off, as long as press the power switch of the host computer, do not need to carry on the specialized operation to the control device, start the host computer of automatic delay, and after the host computer is started, can resume the normal operation of the power switch of the host computer, therefore will not change the normal use habit when operating personnel start, close and use the computer, it is simple and convenient to use; the control device automatically cuts off the alternating current power supply between the host and the peripheral after the computer host is shut down, and the control device is supplied with power by a battery without using the alternating current power supply, so that the long-term safety is better; the power switch of the computer host provides a manual trigger signal for the control device, and when the control device is additionally arranged on the computer system, the appearance of the front panel of the computer host is unchanged, and the original appearance of the computer host is not influenced; the device follows the principle that when the computer is turned on and off, the peripheral is turned on first, the host is turned on later, the host is turned off first and the peripheral is turned off later, and no harmful influence is generated on the computer.

Drawings

The invention is further illustrated by the following examples in conjunction with the drawings.

Fig. 1 is a schematic block diagram of the circuit of the present invention.

Fig. 2 is a schematic block diagram of the circuitry of the inventive built-in scheme.

Fig. 3 is a schematic block diagram of an external arrangement circuit of the present invention.

Fig. 4 is a circuit diagram of an embodiment of the present invention.

In figures 1, 2, 3 and 4,

1 is a main controller of the present invention,

reference numeral 2 denotes a shutter-type connector of the present invention,

3 is the controlled power outlet of the present invention,

4 is the peripheral equipment of the computer system,

5 is a computer host.

In figures 1, 2, 3 and 4,

AC-IN represents the input of an alternating current power supply, and L, N and E are phase lines, zero lines and ground lines of the alternating current power supply.

In the main controller (1), the main controller is connected with the main controller,

P-SW-IN is: an input port of a power switch of the host computer,

DC-IN is: a main power input port,

P-SW-OUT is: the controlled power switch is connected with the port,

KR-OUT is: and the relay controls the port.

In the computer host (5), the computer is connected with the computer,

P-SW is: the power switch of the main machine is connected with the power supply,

DC-OUT is: a main power output port for outputting a main power,

P-SW +/-is: mainboard power switch input port.

In the controlled power socket (3), KR is: a relay.

In fig. 4, GND denotes the ground of the circuit, NC denotes empty,

(+ 5V GND + 12V) is an output plug of the power supply box of the computer host.

In fig. 4, the battery GB-1 is composed of 2 CR2032 lithium manganese cells connected in series, nominal voltage: 2 × 3v =6v;

the battery group GB-2 is formed by connecting 4 No. 5 alkaline zinc-manganese batteries in series, and the nominal voltage is as follows: 4 × 1.5v =6v.

In FIG. 4, F1-F5 are 5 NOT gates in IC1, IC1 is model 4069B, and its 6 th NOT gate is unused;

YF1-YF4 are 4 NAND gates in the integrated circuit IC2, and the model of the IC2 is 4011B;

YF5-YF8 are 4 NAND gates in an integrated circuit IC3, and the type of the IC3 is 4011B;

SYF1-SYF4 are 4 Schmitt input NAND gates in an integrated circuit IC4, and the IC4 has a model 4093B.

In fig. 4, IC1-IC4 belong to the 4000 series standard digital integrated circuit, IC1-IC4 are all in a 14-pin arrangement,

pin 14 is connected to power and pin 7 is connected to ground, which are shown collectively in fig. 4.

In fig. 4, IC5 is a direct current-to-direct current (DC-DC) power converter integrated circuit, model MC34063,

the individual pins of the IC5 are labeled in the figure according to the functions listed in its application manual.

In FIG. 4, relay KR is model G2R-2A-12VDC, and 2 pairs of normally open contacts drive coil nominal voltage 12V.

The resistors R1-R25 all have the unit of Ω, and their values are indicated in the figure.

The capacitance C7 is 470pF and the capacitances C1-C6, C8-C12 have the unit uF, the values of which are marked in the figure.

The inductors L1-L7 are high-frequency attenuation magnetic beads, the high-frequency characteristic resistance (non-impedance) is 100 omega, and the direct-current resistance is 0 omega

The models of the diodes VD8, VD9, VD10 and ZD1 are marked in the figure, and the models of the diodes VD1-VD7 are 1N4148.

The types of the field effect tube and the triode VT1-VT4 are marked in the figure.

Fuse FU1, FU2 have fusing current values shown in the figure.

Detailed Description

In fig. 2, a master controller 1 is built in, a relay control port KR-OUT of the master controller 1 in a computer is connected with a controlled power socket 3 outside the computer through a baffle connector 2, and the baffle connector 2 provides an electrical connection channel for a control device to penetrate through the inside and the outside of a computer host. At present, 3.5/5.25 inch driver bracket and PCI/PCI-E expansion slot (PCI/PCI-E is the local bus specification of computer) are left in the host of the common desktop computer, so the shape structure of the main controller 1 can adopt the module form which is the same as or similar to the shape of the 3.5/5.25 inch driver, and the 3.5/5.25 inch driver bracket is installed on the computer case, the main power input comprises the grounding of the circuit and can use the main power output plug or other ports which are idle in the host power box, or the shape structure of the main controller 1 can also adopt the PCI/PCI-E board card form and is installed on the PCI/PCI-E expansion slot of the computer mainboard, the main power input comprises the grounding of the circuit and can be provided by the PCI/PCI-E expansion slot of the computer mainboard, and the baffle type connector 2 can be integrated with the main controller 1, and the structure accords with the computer hardware structure specification, so that the installation process of the control device is simpler; the space in the computer case is larger, so the appearance structure of the main controller 1 can also adopt a module form with a non-standard structure; or the main controller 1 can also be integrated into the computer case, integrated with the computer case or made into an accessory of the computer case.

In fig. 3, the main controller 1 is externally disposed, and the main power switch P-SW, the main power output port DC-OUT, and the main board power switch input port P-SW of the computer host 5 are connected to the main controller 1 outside the computer host 5 through the baffle connector 2, and the baffle connector 2 provides an electrical connection channel for the control device to pass through the inside and the outside of the computer host. When the main controller 1 is externally arranged, the main controller 1 and the controlled power socket 3 can be combined into an integral structure to enhance the integrity, or the number of single sockets for output is reduced after the main controller 1 and the controlled power socket 3 are combined, so that the single controller is formed and is matched with a common multi-position power socket for use.

In the embodiment shown in fig. 4:

(1) the construction and connection of the embodiment shown in fig. 4: the main controller 1 adopts a built-in mode, the main controller 1 adopts a module/assembly form which has the same or similar appearance with a 3.5 inch driver and is arranged on an idle 3.5 inch driver bracket of a computer case, a battery is arranged in the main controller 1, a baffle type connector 2 is arranged at an idle expansion slot baffle position at the rear part of the computer case, a controlled power socket 3 is arranged outside the computer case, and a built-in relay KR adopts a monostable electromagnetic relay; when the device is used, a main machine power switch P-SW of a computer is disconnected from a main machine power switch input port P-SW +/-firstly, the main machine power switch P-SW is connected to a main machine power switch input port P-SW-IN of a main controller 1, a main machine power output port DC-OUT comprises an idle main power output plug (+ 12V GND 5V) of a circuit grounding use main machine power box, the main machine power output port DC-IN is connected with a main machine power input port DC-IN of the main controller 1, a controlled power switch switching port P-SW-OUT of the main controller 1 is connected with a main machine power switch input port P-SW +/-minus, a relay control port KR-OUT of the main controller 1 is connected with a driving coil of a relay KR arranged IN a controlled power socket 3 through a connector X-1 on a baffle type connector 2, and AC power is provided by the controlled power socket 3 for a computer main machine 5 and each peripheral 4 of a computer system; in the main controller 1, YF2, YF3, YF4 form a D latch, the data input end is D, the clock control end is CP, the in-phase output end is Q, the inverted output end is Q, and the D latch logic function is as follows: when CP =1, Q = D, Q = D is not, when CP = O, keeping the output state of Q and Q before the CP falling edge unchanged; in the main controller 1, the IC5 and its peripheral components R22, R23, R24, R25, C6, C7, C8, L8, VD10 constitute a direct current-direct current (DC-DC) conversion circuit, which functions to convert an input direct current voltage into a fixed 12V output, which is a relay driving circuit; in the main controller 1, a circuit adopts a battery power supply mode, and because the driving current required by the action of the relay is large, the logic circuit is interfered when one group of batteries are used, so that the main controller 1 uses two groups of batteries GB-1 and GB-2 to independently supply power to the logic circuit and the relay driving circuit respectively so as to improve the reliability of the circuit; in the main controller 1, F2, R3, R4 and F3, F4, R6, R7 constitute two schmitt triggers to enhance the interference immunity of the circuit.

(2) The working process of the embodiment shown in fig. 4:

the power-off state of the computer system is used as the initial state, and the levels of the logic gates are shown in table 1.

When a host power switch P-SW is pressed down, F3 and F4 are turned over, F3 outputs 1 level and is sent to a b end of YF5, at the moment, an a end of YF5 is 0 level, YF5 output is unchanged, 1 level output by F3 is also sent to a b end of YF7, at the moment, an a end of YF7 is 1 level, YF7 is turned over to output 0 level, YF8 outputs 1 level, VT1 is conducted, C3 is rapidly discharged, after the host power switch P-SW is released, F3, F4, YF7, YF8 and VT1 are recovered, YF7 outputs 1 level, VT1 is cut off, C3 is charged by R9, a + end of C3 can keep 0 level for a period of time, a + end of C3 enables SYF2 and SYF3 to be turned over, SYF3 outputs 0 level, one path is sent to a b end of SYF1, SYF1 is enabled to turn over to output 1 level, VT3 and KR 4 is conducted, a battery pack power supply circuit is controlled to output 12 voltage at a GB-12 output voltage control port of a relay, the AC power is connected to the driving coil of relay KR in controlled power socket 3 via baffle type connector 2, each peripheral 4 of computer system is started directly, computer host 5 enters standby state, at the same time, 0 level output by SYF3, another path charges C4 via R13 to make the b end voltage of SYF4 decrease gradually, after R13 and C4 delay, SYF4 turns over to output 1 level, VT2 is conducted to make the controlled power switch switching port P-SW-OUT to ground low resistance state, VD5 or VD6 makes the + end of the main board power switch input port P-SW +/-conducted to ground to start the computer host 5, the time constants of R13 and C4 determine the delay start time of computer host 5, the time constants of R9 and C3 must be greater than those of R13 and C4, in the circuit, R9, C4, the time constant of C3 is 6.8S, and the time constants of R13 and C4 are 2.2S; when the computer host 5 is started, the output port DC-OUT of the main power supply generates output and inputs the output to the input port DC-IN of the main power supply of the main controller 1, wherein, the +12V main power supply is divided by R1 and R2 to overturn F1 and F2, F1 outputs 0 level, F5 overturns and outputs 1 level, C5 discharges by R17 and VD7, VD7 clamps the end a of SYF1 to prevent the voltage from being overhigh, the end a of SYF1 keeps 1 level, C5 discharges to prepare for relay delay power supply when the computer is shut down, the +12V main power supply generated after the computer host 5 is started enables F2 to output 1 level and send the level to the end D of a D latch formed by YF1-YF4, under the normal operation condition of the computer, because the host power supply switch P-SW is released at the moment and CP is restored to 1 level, Q outputs 0 level and sends the level to the end A of YF7 to keep the output of YF7 constant at 1 level during the startup period of the computer, further keeping YF8 at 0 level, VT1 at cut-off state, YF6 is inputted at 0 level of Q output, YF6 is turned over, 1 level is outputted, C3 is charged by R8 and VD1, + end voltage of C3 is rapidly increased, SYF2 and SYF3 are turned over again, SYF3 outputs 1 level and is sent to b end of SYF1, at this time, A end of SYF1 is 1 level, SYF1 is turned over, 0 level is outputted, VT3 and VT4 are cut off, output of battery group GB-2 is cut off, because +12V main power supply supplies power to relay driving circuit by VD8, relay control port KR-OUT is not lost power, relay KR is supplied power by main power supply, pull-IN state is kept, 1 level outputted by SYF3 is discharged to C4 by VD3 and R12, after short time delay, B end of SYF4 is put at 1 level, and A end of YF5 is at 1 level, the b end is 0 level, YF5 outputs 1 level, the a end of SYF4 is 1 level, therefore, SYF4 outputs 0 level, VT2 is cut off, the controlled power switch switching port P-SW-OUT restores the high resistance state to the ground, under the condition of normal startup of the computer, the holding time of the controlled power switch switching port P-SW-OUT to the low resistance state to the ground is mainly determined by the startup reaction time of the computer host 5 and the time constants of R8, C3, R12 and C4, and the computer enters the normal working state.

In the power-on state of the computer, the logic gate levels are shown in Table 2.

In the working state of computer startup, when the computer host power switch P-SW is pressed down, the F3 overturns to output 1 level and sends the level to the b end of YF7, but the a end of YF7 is 0 level at the moment, so that the output of YF7 can keep 1 level unchanged, further the states of YF8, VT1, C3, SYF2 and SYF3 are unchanged, the b end of SYF4 keeps 1 level, the host power switch P-SW is pressed to make the 1 level output by F3 overturning also send to the b end of YF5, at the moment, the a end of YF5 is 1 level, so that YF5 overturns to output 0 level and sends to the a end of SYF4, the output 1 level of SYF4, VT2 is conducted, and the controlled power switch switching port P-SW-OUT is in a low impedance state to ground, after the host power switch P-SW is released, F3, YF5, SYF4 and VT2 are recovered, the switching port P-SW-OUT of the controlled power switch is recovered to a high impedance state to the ground, the state of the host power switch P-SW is synchronously reflected to the input port P-SW +/-, the logic circuit recovers the control of the host power switch P-SW to the input port P-SW +/-of the mainboard power switch after the computer is started, and in the starting state of the computer, the point pressing operation or the long pressing operation can be carried OUT on the host power switch P-SW besides the normal soft-off operation of the computer.

When the computer is shut down after use, the +12V main power supply of the computer host 5 loses power, F1 and F2 are inverted, the 0 level output by F2 is sent to the D end of a D latch, the Q outputs the 1 level and is sent to the a end of YF7, the b end of YF7 is the 0 level at the moment, so that the YF7 output keeps unchanged, the 1 level output by Q enables the 0 level output by YF6 to be inverted, the isolation effect of VD1 cannot influence C3, the 1 level output by F1 is sent to F5, the F5 outputs the 0 level, C5 is charged through R16, a 0 level controlled by the time constants of R16 and C5 is generated at the a end of SYF1, and during the period, the SYF1 outputs the 1 level to control VT3 and VT4 to be conducted, the battery group GB-2 supplies power to the relay driving circuit, so that the relay KR can still maintain a pull-in state for a period of time after the computer host 5 is shut down, the time constants of R16 and C5 determine the delayed closing time of the computer peripheral, the time constants of R16 and C5 in the circuit are 2.2S, logically, although the +12V main power supply loses power before and F1, F5 and SYF1 are turned over, the process is short, due to the energy storage effect of C6 and C8 and the return difference characteristic of the relay, the relay KR cannot be released in the process, after the circuit is delayed by R16 and C5, the relay KR loses power and releases, the alternating current power supply of the computer system is completely cut off, and each logic gate recovers the initial state; when the computer is in standby and restarted, the +12V main power supply of the computer host 5 is unchanged, the state of the control device is not changed, for example, the +12V main power supply of the computer host 5 disappears due to factors such as power failure, and the control device runs the shutdown process to separate the computer system from the alternating current power supply.

(3) The abnormal case of the embodiment shown in fig. 4 illustrates: in the main controller 1, when the CP end of a D latch formed by YF1-YF4 is at 0 level, the output state of Q before the falling edge of the CP end is kept unchanged, when a host power switch (P-SW) is in an on state, the CP end of the D latch is set at 0 level, the output level of Q is locked and cannot be changed due to the change of the level of the D end, under the abnormal operation condition that the host power switch P-SW is not released during the starting time of a computer, and under the condition that the computer is forced to be shut down by pressing the host power switch P-SW for a long time after being started, the D latch can prevent YF6 and YF7 from being repeatedly turned over during the period so as to repeatedly start the computer, under the normal operation condition, the D end input and the Q end output of the D latch are equivalent to a NOT gate in logic action; in the main controller 1, the on-resistance of C3 and VT1 and R8, R9 form a variable time constant circuit, when the host power switch P-SW is pressed down in the computer starting process, the on-resistance of VT1 discharges C3 quickly, after the host power switch P-SW is released, R9 charges C3, after the host computer is started, R8 charges C3 quickly, under the abnormal condition that the host computer fails to start due to failure and the like, the circuit delays through R9 and C3, the control device automatically disconnects the relay KR and closes the alternating current power supply.

(4) Circuit description of the main controller 1 in the embodiment shown in fig. 4: in the main controller 1, a direct current-direct current (DC-DC) conversion circuit composed of an IC5 and peripheral elements thereof is used as a relay drive circuit, the function of the relay drive circuit is to convert input direct current voltage into fixed 12V output, the purpose of using the circuit is to fully utilize the electric energy of the battery pack GB-2, and the relay can still reliably work under the condition that the battery pack GB-2 is insufficient in electric quantity due to long-term use, in the circuit, an L8 does not adopt a conventional single inductance mode, but adopts a transformer coupling mode, and a +12V main power supply is also connected to the input end of the circuit, so that the circuit is prevented from being damaged due to accidental short circuit of a relay control port KR-OUT by using the output current limiting function of the IC5, and when the output voltage of the battery pack GB-2 is consistent with the drive voltage of the relay KR, the circuit can be cancelled; in the main controller 1, a circuit structure adopts a micro-power consumption design, the service life of a battery pack GB-1 can reach or exceed the normal service life of a computer host, the battery pack GB-2 only provides large current required by a driving relay when the computer is powered on and powered off, the power on and power off operation of the computer is an action with lower service frequency, and the battery pack GB-2 does not need to be replaced within the normal service life of the computer host under the condition of using a large-capacity battery with long shelf life; in the main controller 1, each logic gate uses a 4000 series CMOS (complementary metal oxide) standard digital integrated circuit, YF8 and VT1 are used for making up the problem of insufficient drive capability of the CMOS circuit, when a computer starts and presses a host power switch P-SW, the VT1 can quickly and thoroughly discharge C3 so as to prevent the failure of starting caused by incomplete discharge of C3 due to over-short pressing time of the host power switch P-SW, and the logic function of YF8 and VT1 in the circuit is equivalent to a diode connected with R9 in parallel; in the main controller 1, the time constants of R13 and C4 determine the delayed start time of the computer host, the time constants of R16 and C5 determine the delayed stop time of the computer peripheral, and the delayed start time of the computer host and the delayed stop time of the computer peripheral can be changed by adjusting the time constants; in the main controller 1, the VD5 and the VD6 have the function of allowing the forward connection and the reverse connection when the controlled power switch switching port P-SW-OUT of the main controller 1 is connected with the main board power switch input port P-SW +/-; in the main controller 1, inductors L1-L7 attenuate high-frequency signals of a line to improve the electromagnetic compatibility of the device; in the main controller 1, the sixth inverter of IC1 is not used, its input terminal is connected to pin 14 or pin 7 of IC1, and its output terminal is left vacant, so it has no influence on the circuit, so it is not shown in fig. 4.

In the embodiment shown in fig. 4: if a charging circuit is added, the device can use the secondary battery correspondingly, and the main power supply charges the device in the starting state of the computer main machine; if a bistable relay drive circuit is added, the device can correspondingly use the bistable relay so as to reduce the power consumption of the device in the computer startup state, and in addition, the device can also use a solid relay; in the main controller 1, the circuit is composed of a NAND gate, a not gate, a diode, a differential circuit and an integral circuit to complete logic operation, or equivalent transformation of the NAND gate, the not gate, the diode, the differential circuit and the integral circuit, and the logic operation can be completed by adopting gate circuits of other forms or by using micro-power consumption singlechips, customized application-specific integrated circuits and other modes.

Claims

1. A computer system AC power supply control device using host power switch and battery, automatically cutting off the AC power supply of computer peripheral after the computer host is shut down, characterized in that: the power switch of the computer host provides a trigger signal for the control device, the control device recovers the normal operation of the power switch of the computer host after the computer host is started, and the control device is supplied with power by the battery for a long time.

2. The ac power control apparatus for computer system using host power switch and battery as claimed in claim 1, wherein: the control device consists of a main controller, a baffle type connector and a controlled power socket, and can be split and combined according to different specific designs.

3. The ac power control apparatus for computer system using host power switch and battery as claimed in claim 1, wherein: the device can adopt a general gate circuit, a single chip microcomputer or a customized special integrated circuit to complete logic operation.

4. The ac power control apparatus for a computer system using a host power switch and a battery as claimed in claim 1, wherein: the batteries in the control device can adopt one or more batteries according to different specific designs of the circuit.