CN101976096B - Electromagnetic radiation protection method of all-in-one computer - Google Patents
Electromagnetic radiation protection method of all-in-one computer Download PDFInfo
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- CN101976096B CN101976096B CN2010102904784A CN201010290478A CN101976096B CN 101976096 B CN101976096 B CN 101976096B CN 2010102904784 A CN2010102904784 A CN 2010102904784A CN 201010290478 A CN201010290478 A CN 201010290478A CN 101976096 B CN101976096 B CN 101976096B
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Abstract
The invention discloses an electromagnetic radiation protection method of an all-in-one computer, which is used for reducing the electromagnetic radiation of the all-in-one computer and comprises the following steps: cladding the all-in-one computer by adopting a shielded case, namely adopting a transparent shielded conductive window and a plastic case with the interior sprayed with a conductive coating to clad the all-in-one computer; covering the high-voltage switchboard of the all-in-one computer by adopting a metal cover, namely, adopting the metal cover without a bottom board to cover the high-voltage switchboard arranged on the mainboard of the all-in-one computer; reforming a power adapter into a filtering power adapter, namely adopting a metal box with a filtering circuit to clad the power adapter; and connecting the filtering power adapter and a dedicated shielded wire by utilizing a shielded joint, wherein a metal shielded sleeve is arranged in the shielded joint. The invention ensures the safety of using the all-in-one computer for all-in-one computer users.
Description
Technical field
The invention belongs to the electromagnetic protection technical field, relate in particular to a kind of electromagnetic radiation protection method of integrated computer.
Background technology
Integrated computer is the computing machine that the main frame of computing machine and display are combined.Fig. 1 is the integrated computer synoptic diagram; Integrated computer just appears on the market several years ago; But because the processing power of integrated computer at that time is less than the branch body computer (main frame separates with display) of main flow; Portability is again less than notebook computer, so it is in a kind of very embarrassed position on market.In recent years; Development along with little handling components; The feasible performance that is integrated in a little handling components in the very little space; The bigger components and parts of the same type that take up room before can meeting or exceeding, thus make the performance of integrated computer can reach even surpass in some aspects the branch body computer of main flow.In addition, along with the development of household application market, integrated computer makes integrated computer become sale focus in the market in usage space, portability and advantage in price.
Yet because integrated computer is that main frame and display are combined, this has caused the radiation of machine under table, to move on the table.When integrated computer was placed on the table, it was apart from keypoint parts such as human body head and hearts, and is nearer in table following time than main frame, is detrimental to health more easily.
In addition; Because there is electromagnetic radiation in integrated computer; Its inside is just in outside that information processed might be sent out through these electromagnetic radiation; Be easy to utilized, thereby caused integrated computer not to be suitable for enterprises and institutions or industry department that army, state security department, scientific research institution of large enterprise etc. have relatively high expectations to confidentiality by unique people.
Defective to above-mentioned integrated computer exists provides a kind of effective electromagnetic radiation shielding method, reduces the electromagnetic radiation of integrated computer, improves the security of using, and becomes a problem that needs to be resolved hurrily.
Summary of the invention
The objective of the invention is to, a kind of electromagnetic radiation protection method of integrated computer is provided,, thereby improve the security that integrated computer uses in order to the electromagnetic radiation of reduction integrated computer generation.
Technical scheme is; The electromagnetic radiation protection method of integrated computer is characterized in that said method comprises: the employing screening housing coats integrated computer, adopts the hardboard of metal cap covering integrated computer, power supply adaptor is transformed into the filter power supply adapter, uses shielded joint connection filter power supply adapter and private mask line;
Wherein, said employing screening housing coats integrated computer and specifically is, adopts transparent screening conductive form and internal spray to have the cabinet of electrically-conducting paint to coat integrated computer; Said transparent screening conductive form is processed through complex method by clear sheet and transparent shielding conductive layer, is perhaps processed by the electrically conducting transparent plastics; Said complex method adopts transparent shield conductive film plated film and bonding or adopt conduction silk screen plated film and the process bonding with clear sheet with clear sheet; One side of transparent screening conductive form or this side center section have conducting function, the opposite side insulation; Said transparent screening conductive form and internal spray have the inboard crimping of the cabinet of electrically-conducting paint, and have the cabinet of electrically-conducting paint to be bonded together transparent shielding conductive layer and internal spray through Copper Foil band or conducting resinl, form totally enclosed electric conductor;
The hardboard that said employing metal cap covers integrated computer specifically is to adopt the metal cap of no base plate to cover the hardboard on the integrated computer mainboard; The top of the metal cap of said no base plate has circular hole, is used for heat radiation; The side of the metal cap of said no base plate has flange, is used for through the hardboard electric wire, avoids it is cut the bad electric leakage that causes;
Saidly power supply adaptor is transformed into the filter power supply adapter specifically is, adopt the can of band filtering circuit to coat power supply adaptor; Said filtering circuit is used to connect working power and it is sent into power supply adaptor, and high frequency that also is used for simultaneously working power is produced or low-frequency voltage import underground, and can is used for the electromagnetic radiation of shielded power supply adapter generation itself; The can of said band filtering circuit comprises filtering circuit, can, be connected ground wire and shielded joint on the box body of can; Said filtering circuit comprises that two-stage suppresses the common mode feedthrough capacitor at least; Every grade of inhibition common mode feedthrough capacitor comprises 2 common mode feedthrough capacitors, and two-stage suppresses the common mode ground capacitance at least, and every grade is suppressed common mode ground electric capacity is comprised 2 common mode ground capacitance; At least two-stage suppresses DM EMI electric capacity; Every grade is suppressed DM EMI electric capacity and comprises 1 DM EMI electric capacity, and two-stage suppresses differential mode inductance at least, and every grade is suppressed differential mode inductance and comprises 2 groups of differential mode inductances on the different iron cores respectively; At least two-stage suppresses the common mode interference inductance, and every grade is suppressed the common mode interference inductance and comprises 2 groups of common mode interference inductance on the same iron core; Said every grade of heart yearn that suppresses 1 common mode feedthrough capacitor in the common mode feedthrough capacitor is serially connected in the phase line, other end ground connection, and the heart yearn of 1 common mode feedthrough capacitor is serially connected in the zero line other end ground connection in addition; One of 1 ground capacitance in said every grade of inhibition common mode ground capacitance terminates in the phase line, and other end ground connection one of 1 ground capacitance terminates in the zero line other end ground connection in addition; Said every grade of two ends difference connecting to neutral line and phase line that suppresses the DM EMI electric capacity in the DM EMI electric capacity; Said every grade of 1 group of differential mode inductance that suppresses in the differential mode inductance is serially connected in the phase line, and 1 group of differential mode inductance is serially connected in the zero line in addition; Said every grade of 1 group of common mode interference inductance serial connection phase line that suppresses in the common mode interference inductance, 1 group of common mode interference inductance serial connection zero line in addition;
The metallic shield cover is installed in the said shielded joint, and with the screen layer and the welding of metallic shield cover of special wire, thereby the screen layer of realization special wire is connected with shielding between the shielded joint.
Said method comprises that also the keyboard case that uses internal spray that conductive material is arranged coats keyboard.
Said method comprises that also the mouse case that uses internal spray that conductive material is arranged coats mouse.
The ground wire of said metal cap links to each other with the ground wire of the can of band filtering circuit, and the ground wire that the high pressure that is used for that metal cap is produced passes through the can of band filtering circuit imports underground.
The diameter of the circular hole at said metal cap top is smaller or equal to 1.5 millimeters.
The span of said common mode feedthrough capacitor, common mode ground capacitance and DM EMI electric capacity is 0.1 microfarad-1 microfarad.
The can of said band filter also comprises shunt resistance, and said shunt resistance one end links to each other with phase line, and the other end links to each other with zero line, is used for sharing the electric current of circuit, avoids puncturing common mode feedthrough capacitor, common mode ground capacitance and DM EMI electric capacity.
Said shielded joint is 4 core Aviation Connector.
Said metallic shield cover adopts copper material to process.
The present invention has reduced the electromagnetic radiation that integrated computer produces, and guarantees integrated computer user's health, has guaranteed that simultaneously the information of integrated computer can not revealed through electromagnetic radiation, has improved the security of using integrated computer.
Description of drawings
Fig. 1 is the integrated computer synoptic diagram;
Fig. 2 is transparent screening conductive window structure figure;
Fig. 3 is a screening housing crimping synoptic diagram;
Fig. 4 is the screening housing synoptic diagram that forms totally-enclosed electric conductor;
Fig. 5 is a hardboard metal cap structural drawing, and wherein (a) is the metal cap side view, (b) is the metal cap front elevation, (c) is the metal cap vertical view;
Fig. 6 is the structural representation that power supply adaptor is transformed into the filter power supply adapter;
Fig. 7 is the filtering circuit figure of filter power supply adapter;
Fig. 8 is improved aviation plug structural drawing;
Fig. 9 is 4 core aviation plug heart yearn jack synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit scope of the present invention and application thereof.
At first, measure the main electromagnetic radiation source of integrated computer through the electromagnetic radiation measuring instrument.Find that through measuring the fuselage of integrated computer (comprising display screen), hardboard are the main sources of electromagnetic radiation.In addition, the electric wire of the power supply adaptor of integrated computer and connection power supply adaptor also is the main source that produces electromagnetic radiation, therefore will transform the connected electric wire of the power supply adaptor of integrated computer, reduces its external radiation.
The electromagnetic radiation protection measure of taking to the fuselage of integrated computer is to adopt screening housing to coat integrated computer.Concrete grammar is to adopt transparent screening conductive form and internal spray to have the cabinet of electrically-conducting paint to coat integrated computer.Fig. 2 is transparent screening conductive window structure figure, and among Fig. 2, transparent screening conductive form is composited by clear sheet 1 and transparent shielding conductive layer 2, is perhaps processed by the electrically conducting transparent plastics.Transparent shielding conductive layer adopts transparent shield conductive film or conducts electricity silk screen and process coating film treatment.The one side that transparent screening conductive form is bonded with transparent shielding conductive layer 2 has conducting function, and face insulate and makes non-glare treated in addition.Fig. 3 is a screening housing crimping synoptic diagram; Among Fig. 3; Transparent screening conductive form and internal spray have the inboard crimping of the cabinet 4 of electrically-conducting paint; And have the cabinet 4 of electrically-conducting paint to be bonded together transparent shielding conductive layer 2 (center section with conducting function of perhaps transparent shielding conductive layer 2) and internal spray through Copper Foil band or conducting resinl 3, form totally enclosed electric conductor.Copper Foil band or conducting resinl 3 one sides have adhesive tape, are used to stick to other objects; Another side is Copper Foil or other conductive materials, has electric conductivity.Fig. 4 is the screening housing synoptic diagram that forms totally-enclosed electric conductor, and among Fig. 4, transparent shielding conductive layer 2, Copper Foil band or conducting resinl 3 and internal spray have the cabinet 4 of electrically-conducting paint to form continuous totally enclosed electric conductor.In addition, frame display screen mouth overlap joint before transparent screening conductive form and the integrated computer.The screening housing that adopts aforesaid way to process, its inside has formed the electric conductor of a sealing, realizes electromagnetic protection function.
To the electromagnetic radiation that hardboard produces, adopt metal cap to cover the hardboard of integrated computer.Concrete method is to adopt the metal cap of no base plate to cover the hardboard on the integrated computer mainboard.Fig. 5 is a hardboard metal cap structural drawing, and wherein (a) is the metal cap side view, (b) is the metal cap front elevation, (c) is the metal cap vertical view.The top of the metal cap of no base plate has circular hole 7, is used for heat radiation.The side of the metal cap of no base plate has flange 6, is used for through the hardboard electric wire, avoids it is cut the bad electric leakage that causes.The diameter of the circular hole 7 at metal cap top should guarantee radiating effect, also will reach the requirement of protection electromagnetic radiation simultaneously.According to wave guide principles, the preferred span of the diameter of the circular hole 7 at the metal cap top in the present embodiment is smaller or equal to 1.5 millimeters.For the electromagnetic energy that guarantees to be coupling on the metal cap can access release timely; In the present invention; Can also the ground wire (seeing the PE end of Fig. 6) of the ground wire of metal cap and improved the power supply adaptor can of filtering circuit (promptly with) be linked to each other, be used for the electromagnetic energy that is coupling on the metal cap underground through the ground wire importing of the can of band filtering circuit.
Power supply adaptor is the indispensable peripheral hardware of integrated computer, and its effect is to convert the 220V alternating voltage to the 12V DC voltage, for integrated computer provides working power.Because AC-DC conversion adopts the Switching Power Supply pattern, so the electromagnetic radiation of this equipment must be higher than miscellaneous part.For reducing the electromagnetic radiation of power supply adaptor, need transform power supply adaptor.Concrete remodeling method is to adopt the can of band filtering circuit to coat power supply adaptor.Filtering circuit is used to connect working power and it is sent into power supply adaptor, and the HF voltage that also is used for simultaneously working power is produced imports underground.Can is used for the electromagnetic radiation that shielded power supply adapter itself produces.Fig. 6 is the structural representation that power supply adaptor is transformed into the filter power supply adapter.Among Fig. 6, the can of band filtering circuit comprises filtering circuit, can, is connected ground wire (PE among Fig. 6) and shielded joint on the box body of can.Fig. 7 is the filtering circuit figure of filter power supply adapter.Filtering circuit comprises that two-stage suppresses the common mode feedthrough capacitor at least, two-stage suppresses the common mode ground capacitance at least, two-stage suppresses DM EMI electric capacity at least, two-stage suppresses differential mode inductance at least, two-stage suppresses the common mode interference inductance at least.In the present embodiment, filtering circuit comprises that three grades are suppressed the common mode feedthrough capacitor, and level Four suppresses the common mode ground capacitance, level Four suppresses DM EMI electric capacity, two-stage inhibition differential mode inductance, three grades of inhibition common mode interference inductance.
Among Fig. 7, every grade of inhibition common mode feedthrough capacitor comprises 2 common mode feedthrough capacitors, and the heart yearn of 1 common mode feedthrough capacitor is serially connected in the phase line, other end ground connection, and the heart yearn of 1 common mode feedthrough capacitor is serially connected in the zero line other end ground connection in addition.Among Fig. 7, three grades of common mode feedthrough capacitors that suppress each grade of common mode feedthrough capacitor are respectively CZ1 and CZ2, CZ3 and CZ4, CZ5 and CZ6.The HF voltage that inhibition common mode feedthrough capacitor is used for circuit is produced imports underground.
Every grade of inhibition common mode ground capacitance comprises 2 common mode ground capacitance, and one of 1 common mode ground capacitance terminates in the phase line, and other end ground connection one of 1 common mode ground capacitance terminates in the zero line other end ground connection in addition.Among Fig. 7, the common mode ground capacitance that level Four suppresses each grade of common mode ground capacitance is respectively CY1 and CY2, Cy3 and CY4, CY5 and CY6, CY7 and CY8.The low-frequency voltage that inhibition common mode ground capacitance is used for circuit is produced imports underground.
Every grade is suppressed DM EMI electric capacity and comprises 1 DM EMI electric capacity, the two ends difference connecting to neutral line and the phase line of DM EMI electric capacity.Among Fig. 7, it is respectively CX1, CX2, CX3 and CX4 that level Four suppresses DM EMI electric capacity.
Every grade is suppressed differential mode inductance and comprises 2 groups of differential mode inductances on the different iron cores respectively, and 1 group of differential mode inductance is serially connected in the phase line, and 1 group of differential mode inductance is serially connected in the zero line in addition.Among Fig. 7, it is respectively LD1 and LD2, LD3 and LD4 that two-stage suppresses differential mode inductance.
Every grade is suppressed the common mode interference inductance and comprises 2 groups of common mode interference inductance on the same iron core, 1 group of common mode interference inductance serial connection phase line, 1 group of common mode interference inductance serial connection zero line in addition.Among Fig. 7, three grades are suppressed the DM EMI inductance is respectively Lcm1, Lcm2 and Lcm3.
This filtering circuit can also comprise shunt resistance.Among Fig. 7, R is a shunt resistance.This shunt resistance one end links to each other with phase line, and the other end links to each other with zero line, is used for sharing the electric current of circuit, avoids the excessive puncture common mode of electric current feedthrough capacitor, common mode ground capacitance and DM EMI electric capacity in the circuit.
In practical operation, the earth terminal of above-mentioned inhibition common mode feedthrough capacitor and inhibition common mode ground capacitance can connect the box body of can, realizes being connected with ground through the ground wire of this box body.In the present embodiment, the preferred span of common mode feedthrough capacitor, common mode ground capacitance and DM EMI electric capacity is 0.1 microfarad-1 microfarad.
Because the interference that the cable that is connected with the power supply adaptor of integrated computer can pass to adapter has bigger electromagnetic radiation equally, therefore need electric wire with the common power supply adaptor of private mask line replacement.In order to make improved power supply adaptor and private mask line form a complete shield, guarantee that electromagnetic radiation does not expose, the present invention uses aviation plug to connect improved power supply adaptor and private mask line as shielded joint.
Shield between the aviation head of aviation plug commonly used and the aviation seat and be connected, the aviation seat also is to shield to be connected with the aviation plug interface, but the screen layer of special wire with the aviation head and be unrealized to shield and be connected, electromagnetism may be from revealing here.For this reason, need transform aviation plug.Specific practice is, the metallic shield cover is installed in the cover in the aviation head of aviation plug, the screen layer and the metallic shield cover of special wire welded, thereby the screen layer of realization special wire is connected with shielding between the aviation head.Fig. 8 is improved aviation plug structural drawing, and among Fig. 8, private mask line 8 is connected with the aviation plug shielding.Metal screen layer 10 is installed in the inside of cover 9 in the aviation head.This metal screen layer 10 and screen layer turn up 11 (this screen layer turn up 11 are screen layers after part that private mask line 8 gets into aviation plugs is peeled outer layer insulation off) through the soldering welding, thereby the screen layer of formation special wire is connected with shielding between the aviation head.Making improved aviation plug can carry out as follows:
1, according to Fig. 8 overlap 9 successively in suit aviation seat, the aviation head, metallic shield cover 10.
2, peel private mask line outer layer insulation 14mm off, successively turn up, expose screen layer and turn up 11, guarantee that screen layer turns up 11 not damage, peel primary insulation 3mm off, wear heat-shrink tube 12.
3, according to connection table definition (referring to the explanation of facing Fig. 9 down), welding private mask wire core 15 is used the specific purpose tool pyrocondensation to aviation plug, and it is fixing to break 500V insulating gel 13, and thickness must not the contamination shield face less than 7mm.
4, metallic shield cover rotation is advanced to aviation plug end face 14 (ground plane) is close to, the screen layer of private mask line is turned up 11 overlap 10 through weldings, weldering is tight, forms solder joint 16 with metallic shield.
5, aviation plug is plugged on the aviation seat of clamping, tightens in the aviation head with 9 cun spanners and overlap, guarantee that aviation plug end face 14 (ground planes) electrically contact well.
In the present embodiment, metallic shield cover preferably copper material is made.Aviation plug uses 4 core aviation plugs.Fig. 9 is 4 core aviation plug heart yearn jack synoptic diagram, and among Fig. 9, heart yearn jack 17 connects positive pole and the negative pole that direct current is exported respectively with heart yearn jack 18, and heart yearn jack 19 is put sky with heart yearn jack 20.
Through adopt screening housing coat integrated computer, adopt metal cap cover integrated computer hardboard, power supply adaptor is transformed into the filter power supply adapter, uses shielded joint to connect filter power supply adapter and private mask line, can prevent the main electromagnetic radiation that integrated computer produces.Certainly; Other peripheral hardwares of integrated computer might also can discharge a spot of electromagnetic radiation; The radiant quantity of these electromagnetic radiation only accounts for the minimum part of the whole amount of electromagnetic radiation of integrated computer, in order to realize comprehensive electromagnetic radiation protection, can take to reduce the measure of electromagnetic radiation to these peripheral hardwares.Such as, use internal spray to have the keyboard case of conductive material to coat keyboard, thereby reduce the electromagnetic radiation of keyboard; Use internal spray to have the mouse case of conductive material to coat mouse, in order to electromagnetic radiation of reducing mouse or the like.
It more than is the electromagnetic protection method of integrated computer provided by the invention; This method can reduce the electromagnetic radiation that integrated computer produces effectively; Guarantee that the integrated computer user avoids electromagnetic radiation; The information that has yet guaranteed integrated computer can not revealed through electromagnetic radiation, has realized the security of using.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (9)
1. the electromagnetic radiation protection method of integrated computer is characterized in that said method comprises: adopt screening housing coat integrated computer, adopt metal cap cover integrated computer hardboard, power supply adaptor is transformed into the filter power supply adapter, uses shielded joint to connect filter power supply adapter and private mask line;
Wherein, said employing screening housing coats integrated computer and specifically is, adopts transparent screening conductive form and internal spray to have the cabinet of electrically-conducting paint to coat integrated computer; Said transparent screening conductive form is processed through complex method by clear sheet and transparent shielding conductive layer, is perhaps processed by the electrically conducting transparent plastics; Said complex method adopts transparent shield conductive film plated film and bonding or adopt conduction silk screen plated film and the process bonding with clear sheet with clear sheet; One side of transparent screening conductive form or this side center section have conducting function, the opposite side insulation; Said transparent screening conductive form and internal spray have the inboard crimping of the cabinet of electrically-conducting paint, and have the cabinet of electrically-conducting paint to be bonded together transparent shielding conductive layer and internal spray through Copper Foil band or conducting resinl, form totally enclosed electric conductor;
The hardboard that said employing metal cap covers integrated computer specifically is to adopt the metal cap of no base plate to cover the hardboard on the integrated computer mainboard; The top of the metal cap of said no base plate has circular hole, is used for heat radiation; The side of the metal cap of said no base plate has flange, is used for through the hardboard electric wire, avoids it is cut the bad electric leakage that causes;
Saidly power supply adaptor is transformed into the filter power supply adapter specifically is; Adopt the can of band filtering circuit to coat power supply adaptor; Filtering circuit is used to connect working power and it is sent into power supply adaptor; High frequency that also is used for simultaneously working power is produced or low-frequency voltage import underground, and can is used for the electromagnetic radiation of shielded power supply adapter generation itself; The can of said band filtering circuit comprises filtering circuit, can, be connected ground wire and shielded joint on the box body of can;
Said filtering circuit comprises that two-stage suppresses the common mode feedthrough capacitor at least; Every grade of inhibition common mode feedthrough capacitor comprises 2 common mode feedthrough capacitors, and two-stage suppresses the common mode ground capacitance at least, and every grade is suppressed the common mode ground capacitance and comprises 2 common mode ground capacitance; At least two-stage suppresses DM EMI electric capacity; Every grade is suppressed DM EMI electric capacity and comprises 1 DM EMI electric capacity, and two-stage suppresses differential mode inductance at least, and every grade is suppressed differential mode inductance and comprises 2 groups of differential mode inductances on the different iron cores respectively; At least two-stage suppresses the common mode interference inductance, and every grade is suppressed the common mode interference inductance and comprises 2 groups of common mode interference inductance on the same iron core; Said every grade of heart yearn that suppresses 1 common mode feedthrough capacitor in the common mode feedthrough capacitor is serially connected in the phase line, other end ground connection, and the heart yearn of 1 common mode feedthrough capacitor is serially connected in the zero line other end ground connection in addition; One of 1 common mode ground capacitance in said every grade of inhibition common mode ground capacitance terminates in the phase line, and other end ground connection one of 1 common mode ground capacitance terminates in the zero line other end ground connection in addition; Said every grade of two ends difference connecting to neutral line and phase line that suppresses the DM EMI electric capacity in the DM EMI electric capacity; Said every grade of 1 group of differential mode inductance that suppresses in the differential mode inductance is serially connected in the phase line, and 1 group of differential mode inductance is serially connected in the zero line in addition; Said every grade of 1 group of common mode interference inductance serial connection phase line that suppresses in the common mode interference inductance, 1 group of common mode interference inductance serial connection zero line in addition;
The interior metallic shield cover of installing of said shielded joint with the screen layer and the welding of metallic shield cover of private mask line, thereby realizes that the screen layer of private mask line is connected with the shielding that shields between the head.
2. the electromagnetic radiation protection method of integrated computer according to claim 1 is characterized in that said method comprises that also the keyboard case that uses internal spray that conductive material is arranged coats keyboard.
3. the electromagnetic radiation protection method of integrated computer according to claim 1 is characterized in that said method comprises that also the mouse case that uses internal spray that conductive material is arranged coats mouse.
4. according to the electromagnetic radiation protection method of any described integrated computer of claim in the claim 1,2 or 3; The ground wire that it is characterized in that said metal cap links to each other with the ground wire of the can of band filtering circuit, and the ground wire that the high pressure that is used for that metal cap is produced passes through the can of band filtering circuit imports underground.
5. according to the electromagnetic radiation protection method of any described integrated computer of claim in the claim 1,2 or 3, the diameter of circular hole that it is characterized in that said metal cap top is smaller or equal to 1.5 millimeters.
6. according to the electromagnetic radiation protection method of any described integrated computer of claim in the claim 1,2 or 3, the span that it is characterized in that said common mode feedthrough capacitor, common mode ground capacitance and DM EMI electric capacity is 0.1 microfarad-1 microfarad.
7. according to the electromagnetic radiation protection method of any described integrated computer of claim in the claim 1,2 or 3; It is characterized in that said filtering circuit also comprises shunt resistance; Said shunt resistance one end links to each other with phase line; The other end links to each other with zero line, is used for sharing the electric current of circuit, avoids puncturing common mode feedthrough capacitor, common mode ground capacitance and DM EMI electric capacity.
8. according to the electromagnetic radiation protection method of any described integrated computer of claim in the claim 1,2 or 3, it is characterized in that said shielded joint is 4 core Aviation Connector.
9. according to the electromagnetic radiation protection method of any described integrated computer of claim in the claim 1,2 or 3, it is characterized in that said metallic shield cover adopts copper material to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102904784A CN101976096B (en) | 2010-09-25 | 2010-09-25 | Electromagnetic radiation protection method of all-in-one computer |
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| CN2010102904784A CN101976096B (en) | 2010-09-25 | 2010-09-25 | Electromagnetic radiation protection method of all-in-one computer |
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| CN101976096B true CN101976096B (en) | 2012-06-20 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103368377A (en) * | 2013-07-17 | 2013-10-23 | 华南理工大学 | Preceding-stage EMI filtering protective circuit of driving power source |
| CN104298317A (en) * | 2014-10-09 | 2015-01-21 | 安方高科电磁安全技术(北京)有限公司 | Low-leakage display |
| CN104298325A (en) * | 2014-10-09 | 2015-01-21 | 安方高科电磁安全技术(北京)有限公司 | Low-leakage host case |
| DE102018208925A1 (en) * | 2018-06-06 | 2019-12-12 | Bayerische Motoren Werke Aktiengesellschaft | Method of shielding components |
| CN108631582A (en) * | 2018-06-15 | 2018-10-09 | 北京新能源汽车股份有限公司 | Power supply filter circuit, battery management system and automobile |
| CN114530747A (en) * | 2022-01-28 | 2022-05-24 | 北京春秋煜盛科技有限公司 | Frequency doubling crystal laser with electromagnetic shielding layer of pulse power supply high-voltage line |
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| CN1051449A (en) * | 1989-10-27 | 1991-05-15 | 国际商业机器公司 | Reduce the device of electromagnetic radiation from computer |
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| CN2655318Y (en) * | 2003-08-20 | 2004-11-10 | 川龙金属股份有限公司 | Structure of electromagnetic wave prevention computer casing |
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| CN1051449A (en) * | 1989-10-27 | 1991-05-15 | 国际商业机器公司 | Reduce the device of electromagnetic radiation from computer |
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| CN2655318Y (en) * | 2003-08-20 | 2004-11-10 | 川龙金属股份有限公司 | Structure of electromagnetic wave prevention computer casing |
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Address after: 100094 Beijing Haidian District, Fengde East Road, No. 9 Courtyard, Building 3, 317B Patentee after: ANFANG HIGH-TECH ELECTROMAGNETIC SAFETY TECHNOLOGY (BEIJING) Co.,Ltd. Address before: 100094, Beijing Haidian District Zhongguancun Yongfeng industrial base, No. 9 East Feng Tak Road Patentee before: ANFANG HIGH TECH INFORMATION S |