CN1165009C - Device and method for automatic switching between computer networks - Google Patents
Device and method for automatic switching between computer networks Download PDFInfo
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- CN1165009C CN1165009C CNB021141266A CN02114126A CN1165009C CN 1165009 C CN1165009 C CN 1165009C CN B021141266 A CNB021141266 A CN B021141266A CN 02114126 A CN02114126 A CN 02114126A CN 1165009 C CN1165009 C CN 1165009C
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Abstract
The present invention relates to a device and method for automatically switching between computer networks. The device for automatically switching between computer networks comprises a single chip computer, a transfer switch circuit, a keyboard control circuit, a keyboard sharing circuit, a power on control circuit and an inner and outer network control circuit, wherein a transfer switch position state signal of the transferring switch circuit is connected with the inner and outer network control circuit and the single chip computer, the single chip computer is respectively connected with the keyboard control circuit, the keyboard sharing circuit and the power on control circuit, a control signal of the power on control circuit is connected with a soft start switch PS-ON of a computer, and the keyboard sharing circuit is connected with a computer keyboard and a computer main board keyboard interface circuit. The method for automatically switching between computer networks comprises the following steps: when a switching signal is input, an electrolytic capacitor C1 charge program and a simulating keyboard scanning program are started up, and an operating system quitting command and a computer turning off command are transmitted to the computer by the keyboard sharing circuit; an isolation card can still drive the action of a relay by the function of the energy storage of a capacitor, and therefore, the computer can be automatically turned off and turned on.
Description
Technical field
The present invention relates to a kind of computer network device and method of conversion automatically of realizing, belong to control device and the method for protecting information security of computer network.
Background technology
When " PC network of workstations isolator " and other network security physical isolation card carry out the conversion of inside and outside net in working order down, all must withdraw from the windows or other operating system and the power supply of shutting down computer that are moving, after allowing the information of internal memory all disappear, open computing machine again, only in this way just can guarantee the physical isolation of the inside and outside network information.Above-mentioned these operating process at present are all by artificial realization, and operating process is very loaded down with trivial details, and is very inconvenient, thereby restricted " PC network of workstations isolator " and other network security physical isolation and be stuck in promotion and application in the real work.The patent No. of announcing such as Patent Office of the People's Republic of China is 99233633.3 patent, and the implementation result of its technical scheme and method come to this.
Summary of the invention
Of the present invention from aim to provide a kind of automatically device and method of conversion of computer network of realizing, reach and only operate switch, just can realize the purpose of the intelligence switching of inside and outside net.That is: when following in working order, when operating inside and outside net switch, can realize withdrawing from automatically windows or other operating system and the power supply of shutting down computer by this technical scheme, open computer power supply then again automatically, realize the intellectuality of inside and outside net transfer process.
Several situation analysis of manually shutting down down in working order:
(1), and then select " shutdown system " to realize that safety withdraws from " WINDOWS " or other operating system, last powered-down by click the Start menu.
(2) by pressing " DEL " key again behind " CTRL+ATL " key by lower keyboard, when occurring that dialog box " ends task " and during " shutting down computer " option, selecting " shutting down computer " just can withdraw from WINDOWS or other operating system and powered-down.
(3) by after pressing " WIN98 " key of lower keyboard, press " U " key again, dialog box " (S) shuts down computer ", " newly starting computing machine (R) again " and " restart computing machine and switch to DOS state (M) " three options appear, at this moment press " S " key, promptly select " shutting down computer ", just can withdraw from WINDOWS or other operating system and powered-down by " Y " again.
(4) by one section small routine, when withdrawing from this program, withdraw from WINDOWS or other operating system and powered-down.
(5) set up shortcut and withdraw from WINDOWS or other operating system and powered-down.
Situation in view of above several shutdown, realize realizing withdrawing from automatically WINDOWS or other operating system and powered-down if want by operating inside and outside net switch, utilize the relevant circuit of Single-chip Controlling so, as long as a kind of in the above manually-operated shutdown mode of simulation can realize automatic shutdown process.The one, the operation of analog mouse is at first located on screen, and simulation is clicked again then, realizes withdrawing from WINDOWS or other operating system and powered-down; The 2nd, the simulating keyboard operation, as long as simulation is sent " CTRL+ATL ", " DEL " signal or is sent " WIN98 " " U " " (S) ", " Y " successively to the keyboard mouth, also can send out the keyboard signal that other can realize withdrawing from WINDOWS or other operating system and powered-down, for example: trigger one section shutdown small routine by keyboard signal and shut down computer.The 3rd, utilize the communication port of single-chip microcomputer and computing machine to carry out communication (RS232 mouth etc.) or send interrupt request to computing machine and realize withdrawing from WINDOWS or other operating system and the power supply of shutting down computer.
Analyze the situation of start:
After the shutdown, if want to realize Auto Power On, on control card, working power must be arranged so, the working power of inside and outside net isolation card is provided by computing machine, just mean that also the power supply on the control card also disappears thereupon since shut down, in order to carry out boot action, just working power must be arranged.Can take following several method to solve the working power problem of inside and outside net isolation card: the one, on card, adorn a reserve battery; The 2nd, power supply of outside introducing; The 3rd, on the introducing computing machine+5 volts of standby powers; The 4th, utilize electric energy that electric capacity is store to provide working power (because the start operation element time is very short, the electric energy that electric capacity the is stored use of enough starting shooting) for boot-strap circuit.Present computing machine all is soft switch activated usually, as long as this soft start switch is incorporated into control card, opens by an associated electrical switch or relay again, just can realize opening automatically the purpose of computing machine.Soft start switch is easy to introduce, and it is exactly this soft switch that a PS-ON plug is arranged on mainboard usually.It should be noted that not every shutdown all will open computer power supply automatically again, if like this, will not close computing machine forever.In order to address this problem, single-chip microcomputer at first will detect the shutdown that whether causes because of the inside and outside net change-over switch of operation, if, just open computing machine automatically, otherwise, do not start.
According to above analysis, determine that the present invention thes contents are as follows:
Its device part comprises that single-chip microcomputer 1, conversion switch circuit 2, keyboard control circuit 3, keyboard are shared circuit 4, start shooting control circuit 5 and intranet and extranet control circuit 20; The switch positions status signal of conversion switch circuit 2 links to each other with intranet and extranet control circuit 20, the state exchange signal of conversion switch circuit 2 inputs to single-chip microcomputer 1, single-chip microcomputer 1 is shared circuit 4 with keyboard control circuit 3, keyboard respectively and is linked to each other with start control circuit 5, the control signal of start control circuit 5 links to each other with the soft start switch PS-ON of computing machine, and keyboard is shared circuit 4 and linked to each other with the computer motherboard keyboard interface circuit with computer keyboard; Behind the computer booting, the switch positions status signal of conversion switch circuit 2 is controlled the relay or the electronic switch of intranet and extranet control circuit 20 behind status latch, select the intranet and extranet connectivity port, determine the inside and outside network work storage hard disk of computing machine simultaneously;
Described keyboard is shared circuit 4 and is comprised 2 electronic switch or relay K 11 and K21 that are subjected to single-chip microcomputer 1 control, data-signal DATA end on the normally closed contact of K11 and the computer keyboard links to each other, normally opened contact links to each other with the data-signal DATA end of keyboard control circuit 3, and its common links to each other with the data-signal DATA end of computer motherboard keyboard interface circuit; Clock signal C LOCK end on the normally closed contact of K21 and the computer keyboard links to each other, and normally opened contact links to each other with the clock signal C LOCK end of keyboard control circuit 3, and its common is held with the clock signal C LOCK of computer motherboard keyboard interface circuit and linked to each other; Positive source+the 5V of computer motherboard keyboard interface circuit, power supply ground GND link to each other with positive source+5V, power supply ground GND on the computer keyboard respectively; Receive the intranet and extranet switching signal of conversion switch circuit 2 when single-chip microcomputer 1 after, send control signal to keyboard control circuit 3, supervisory keyboard is shared electronic switch or the relay K 11 and the K21 of circuit 4 simultaneously, makes data-signal DATA end, the clock signal C LOCK of computer motherboard keyboard interface circuit hold logical with data-signal DATA end, the clock signal C LOCK termination of keyboard control circuit 3 respectively;
Described start control circuit 5 comprises triode Q1, resistor R 1, R11, R21, relay K 1, K2 and charging electrolytic condenser C1; The base stage of Q1 links to each other with an output port of single-chip microcomputer 1 by R1, and its collector links to each other with+5V power supply, and emitter links to each other with R11, is in series with the parallel circuit of C1, R21 between the other end of this R11 and the power supply ground; The normally closed contact of the K2 back of pair connecting with the control coil of K1 is in parallel with R1; The control coil of K2 is connected between computing machine+5V power supply and the power supply ground, between two contacts of the normally opened contact of K1 to the soft start switch PS-ON that is connected on computing machine; K2 is in normally open during computer operation, receive the intranet and extranet switching signal of conversion switch circuit 2 when single-chip microcomputer 1 after, send control signal to the start control circuit 5, C1 charges by R11; K2 is in normally off during computer shutdown, and this moment, C1 discharged by the control coil of R21 and K1, adjusted the scale-up factor of R11 and R21, and the K1 adhesive once is equivalent to the enabling signal of soft start switch PS-ON to computing machine, makes computer booting;
The data-signal DATA end of described keyboard control circuit 3, clock signal C LOCK end link to each other with single-chip microcomputer 1 data-signal DATA end, clock signal C LOCK end output terminal respectively, and the data-signal DATA end of keyboard control circuit 3, clock signal C LOCK end link to each other with data-signal DATA end, the clock signal C LOCK end of computer motherboard keyboard interface circuit respectively.
The present invention realizes goal of the invention by following steps:
Step 1: power-up initializing, read the switch state signal of intranet and extranet conversion switch circuit 2 and compare with memory data;
Step 2: when switching signal is imported, start start control circuit 5, make electrolytic condenser C1 charging;
Step 3: after electrolytic condenser C1 charging finishes, start the simulating keyboard scanning sequence, send to computing machine by the shared circuit 4 of keyboard and withdraw from the operating system instruction, send the instruction of shutting down computer then, computer shutdown.
Step 4: behind the computer shutdown, the control coil series circuit discharge of the normally closed contact of electrolytic condenser C1 by K2 pair and K1, K1 time-delay adhesive once, start control circuit 5 makes computer booting to enabling signal of soft start switch PS-ON of computing machine.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention;
Fig. 2 shares schematic block circuit diagram for keyboard;
Fig. 3 is for producing the schematic block circuit diagram of scan code by 104 keyboard special chips;
Fig. 4 is start control circuit schematic diagram;
Fig. 5 is for realizing the main process flow diagram of the object of the invention.
Embodiment
Only the specific implementation process that withdraws from WINDOWS and powered-down automatically by single-chip simulation keyboard operation (alternate manner, principle are consistent) realization and utilize electric capacity storage electric energy to carry out the start operation is done following detailed description below:
As Fig. 1, Fig. 2, Fig. 4, its device part comprises that single-chip microcomputer 1, conversion switch circuit 2, keyboard control circuit 3, keyboard are shared circuit 4, start shooting control circuit 5 and intranet and extranet control circuit 20; The switch positions status signal of conversion switch circuit 2 links to each other with intranet and extranet control circuit 20, the state exchange signal of conversion switch circuit 2 inputs to single-chip microcomputer 1, single-chip microcomputer 1 is shared circuit 4 with keyboard control circuit 3, keyboard respectively and is linked to each other with start control circuit 5, the control signal of start control circuit 5 links to each other with the soft start switch PS-ON of computing machine, and keyboard is shared circuit 4 and linked to each other with the computer motherboard keyboard interface circuit with computer keyboard; Behind the computer booting, the switch positions status signal of conversion switch circuit 2 is controlled the relay or the electronic switch of intranet and extranet control circuit 20 behind status latch, select the intranet and extranet connectivity port, determine the inside and outside network work storage hard disk of computing machine simultaneously;
Described keyboard is shared circuit 4 and is comprised 2 electronic switch or relay K 11 and K21 that are subjected to single-chip microcomputer 1 control, data-signal DATA end on the normally closed contact of K11 and the computer keyboard links to each other, normally opened contact links to each other with the data-signal DATA end of keyboard control circuit 3, and its common links to each other with the data-signal DATA end of computer motherboard keyboard interface circuit; Clock signal C LOCK end on the normally closed contact of K21 and the computer keyboard links to each other, and normally opened contact links to each other with the clock signal C LOCK end of keyboard control circuit 3, and its common is held with the clock signal C LOCK of computer motherboard keyboard interface circuit and linked to each other; Positive source+the 5V of computer motherboard keyboard interface circuit, power supply ground GND link to each other with positive source+5V, power supply ground GND on the computer keyboard respectively; Receive the intranet and extranet switching signal of conversion switch circuit 2 when single-chip microcomputer 1 after, send control signal to keyboard control circuit 3, supervisory keyboard is shared electronic switch or the relay K 11 and the K21 of circuit 4 simultaneously, makes data-signal DATA end, the clock signal C LOCK of computer motherboard keyboard interface circuit hold logical with data-signal DATA end, the clock signal C LOCK termination of keyboard control circuit 3 respectively;
Described keyboard is shared 2 electronic switches of circuit 4 or relay K 11 and K21 and also can be controlled afterwards through status latch by the switch positions status signal of conversion switch circuit 2.
Described start control circuit 5 comprises triode Q1, resistor R 1, R11, R21, relay K 1, K2 and charging electrolytic condenser C1; The base stage of Q1 links to each other with an output port of single-chip microcomputer 1 by R1, and its collector links to each other with+5V power supply, and emitter links to each other with R11, is in series with the parallel circuit of C1, R21 between the other end of this R11 and the power supply ground; The normally closed contact of the K2 back of pair connecting with the control coil of K1 is in parallel with R1; The control coil of K2 is connected between computing machine+5V power supply and the power supply ground, between two contacts of the normally opened contact of K1 to the soft start switch PS-ON that is connected on computing machine; K2 is in normally open during computer operation, receive the intranet and extranet switching signal of conversion switch circuit 2 when single-chip microcomputer 1 after, send control signal to the start control circuit 5, C1 charges by R11; K2 is in normally off during computer shutdown, and this moment, C1 discharged by the control coil of R21 and K1, adjusted the scale-up factor of R11 and R21, and the K1 adhesive once is equivalent to the enabling signal of soft start switch PS-ON to computing machine, makes computer booting;
The data-signal DATA end of described keyboard control circuit 3, clock signal C LOCK end link to each other with single-chip microcomputer 1 data-signal DATA end, clock signal C LOCK end output terminal respectively, and the data-signal DATA end of keyboard control circuit 3, clock signal C LOCK end link to each other with data-signal DATA end, the clock signal C LOCK end of computer motherboard keyboard interface circuit respectively.
When producing scan code, adopt following method of attachment: comprise 104 QWERTY keyboard scan code generator special chip 10 and switch matrix 11 by keyboard scan code generator special chip, the control signal of single-chip microcomputer 1 exports switch matrix 11 and keyboard scan code generator special chip 10 respectively to, and the data-signal DATA end of this keyboard scan code generator special chip 10, clock signal C LOCK end link to each other with data-signal DATA end, the clock signal C LOCK end of the shared circuit 4 of keyboard respectively.
As Fig. 5, the present invention realizes goal of the invention by following steps:
Step 1: power-up initializing, read the switch state signal of intranet and extranet conversion switch circuit 2 and compare with memory data;
Step 2: when switching signal is imported, start start control circuit 5, make electrolytic condenser C1 charging;
Step 3: after electrolytic condenser C1 charging finishes, start the simulating keyboard scanning sequence, send to computing machine by the shared circuit 4 of keyboard and withdraw from the operating system instruction, send the instruction of shutting down computer then, computer shutdown.
Step 4: K2 is in normally off during computer shutdown, and this moment, C1 discharged by the control coil of R21 and K1, adjusted the scale-up factor of R11 and R21, and the K1 adhesive once is equivalent to the enabling signal of soft start switch PS-ON to computing machine, makes computer booting.
In sum, above method mainly contains the remarkable characteristics of the following aspects:
1, isolation card has been utilized chip microprocessor, has realized the intellectuality control of intranet and extranet conversions.
2, isolation card and keyboard Sharing computer keyboard mouth resource (are shared by a special keyboard Line, the mainboard keyboard mouth of a plug in computer, two other branch connects respectively keyboard and isolation card, The relevant circuit of sharing of design the keyboard conflict can not occur on the isolation card), when isolation card need to be shut down, Just touch personification operation to keyboard when shutting down computer, namely isolation card is sent to computer by the keyboard mouth Off signal (sending corresponding keyboard scancode) is realized automatic shutdown, and isolation card does not take meter like this Any resource of calculation machine (address, interruption) can be finished again the task of shutdown preferably;
3, (PS-ON on the computer motherboard inserts with the soft start switch on the computer motherboard ingeniously Pin) introduces line by one and be connected to isolation card, so just can control by isolation card that computer is soft to be left The machine switch is realized its automatic start, the starting-up signal on the isolation card and the start switch that calculates on the panel Be or relation, mutually noninterfere respectively is the unlatching of independent control computer;
In the situation of computer powered-down, utilize the energy-storage function of electric capacity, realized that isolation card is still Can drive the actuating of relay, finish the work of automatic start.
Claims (5)
1, a kind of computer network device of conversion automatically of realizing, comprise intranet and extranet control circuit (20), it is characterized in that also comprising that single-chip microcomputer (1), conversion switch circuit (2), keyboard control circuit (3), keyboard are shared circuit (4) and the control circuit (5) of starting shooting; The switch positions status signal of described conversion switch circuit (2) links to each other with intranet and extranet control circuit (20), the state exchange signal of conversion switch circuit (2) inputs to single-chip microcomputer (1), this single-chip microcomputer (1) is shared circuit (4) with keyboard control circuit (3), keyboard respectively and is linked to each other with start control circuit (5), the control signal of start control circuit (5) links to each other with the soft start switch PS-ON of computing machine, and keyboard is shared circuit (4) and linked to each other with the computer motherboard keyboard interface circuit with computer keyboard; Described start control circuit (5) comprises triode Q1, resistor R 1, R11, R21, relay K 1, K2 and charging electrolytic condenser C1; The base stage of Q1 links to each other with an output port of single-chip microcomputer (1) by R1, and its collector links to each other with+5V power supply, and emitter links to each other with R11, is in series with the parallel circuit of C1, R21 between the other end of this R11 and the power supply ground; The normally closed contact of the K2 back of pair connecting with the control coil of K1 is in parallel with R1; The control coil of K2 is connected between computing machine+5V power supply and the power supply ground, between two contacts of the normally opened contact of K1 to the soft start switch PS-ON that is connected on computing machine.
2, a kind of computer network device of conversion automatically of realizing as claimed in claim 1, it is characterized in that: described keyboard is shared circuit (4) and is comprised 2 electronic switch or relay K 11 and K21 that are subjected to single-chip microcomputer (1) control, data-signal DATA end on the normally closed contact of K11 and the computer keyboard links to each other, normally opened contact links to each other with the data-signal DATA end of keyboard control circuit (3), and its common links to each other with the data-signal DATA end of computer motherboard keyboard interface circuit; Clock signal C LOCK end on the normally closed contact of K21 and the computer keyboard links to each other, and normally opened contact is held with the clock signal C LOCK of keyboard control circuit (3) and linked to each other, and its common is held with the clock signal C LOCK of computer motherboard keyboard interface circuit and linked to each other; Positive source+the 5V of computer motherboard keyboard interface circuit, power supply ground GND link to each other with positive source+5V, power supply ground GND on the computer keyboard respectively.
3, a kind of computer network device of conversion automatically of realizing as claimed in claim 1, it is characterized in that: the data-signal DATA end of described keyboard control circuit (3), clock signal C LOCK end link to each other with single-chip microcomputer (1) data-signal DATA end, clock signal C LOCK end output terminal respectively, and the data-signal DATA end of keyboard control circuit (3), clock signal C LOCK end link to each other with data-signal DATA end, the clock signal C LOCK end of computer motherboard keyboard interface circuit respectively.
4, a kind of computer network device of conversion automatically of realizing as claimed in claim 1, it is characterized in that: described keyboard control circuit (3) comprises keyboard scan code generator special chip (10) and switch matrix (11), the control signal of single-chip microcomputer (1) exports switch matrix (11) sharp keyboard scan code generator special chip (10) respectively to, and the data-signal DATA end of this keyboard scan code generator special chip (10), clock signal C LOCK end link to each other with data-signal DATA end, the clock signal C LOCK end of the shared circuit (4) of keyboard respectively.
5, a kind ofly realize the computer network automatic converting method, it is characterized in that may further comprise the steps with computer network automatic transfer equipment and known computer:
Step 1: power-up initializing, read the switch state signal of intranet and extranet conversion switch circuit (2) and compare with memory data;
Step 2: when switching signal is imported, start start control circuit (5), make electrolytic condenser C1 charging;
Step 3: after electrolytic condenser C1 charging finished, single-chip microcomputer (1) started the simulating keyboard scanning sequence, sent to computing machine by the shared circuit (4) of keyboard and withdrawed from the operating system instruction, sent the instruction of shutting down computer then, computer shutdown,
Step 4: behind the computer shutdown, the normally closed contact of electrolytic condenser C1 by K2 pair discharges with the control coil series circuit of K1, K1 delays time adhesive once, and start control circuit (5) is given enabling signal of soft start switch PS-ON of computing machine, makes computer booting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021141266A CN1165009C (en) | 2002-05-11 | 2002-05-11 | Device and method for automatic switching between computer networks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021141266A CN1165009C (en) | 2002-05-11 | 2002-05-11 | Device and method for automatic switching between computer networks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1396523A CN1396523A (en) | 2003-02-12 |
| CN1165009C true CN1165009C (en) | 2004-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021141266A Expired - Fee Related CN1165009C (en) | 2002-05-11 | 2002-05-11 | Device and method for automatic switching between computer networks |
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| CN (1) | CN1165009C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013063787A1 (en) * | 2011-11-03 | 2013-05-10 | Intel Corporation | System and method for input sharing between multiple devices |
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2002
- 2002-05-11 CN CNB021141266A patent/CN1165009C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1396523A (en) | 2003-02-12 |
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