CN100409141C - Antiinterference method of floatign ground of industrial computer based on PC platform, and device - Google Patents
Antiinterference method of floatign ground of industrial computer based on PC platform, and device Download PDFInfo
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- CN100409141C CN100409141C CNB2006100309576A CN200610030957A CN100409141C CN 100409141 C CN100409141 C CN 100409141C CN B2006100309576 A CNB2006100309576 A CN B2006100309576A CN 200610030957 A CN200610030957 A CN 200610030957A CN 100409141 C CN100409141 C CN 100409141C
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- industrial computer
- power supply
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Abstract
A antiinterference method of system reference location and shell based on PC platform industrial control computer sets no common connection point for system reference location and system shell in product but connects chassis shell of computer to ground reliably for realizing effect of antiinterference.
Description
[technical field]
The present invention relates to anti-disturbance method in a kind of industrial computer system, specifically a kind of floating ground anti-interference method and equipment thereof based on PC platform industrial computer.
[background technology]
The working environment of PC (personal computer) because of mainly using towards the individual of office, factor is considered in order to reduce cost etc., when initial designs just with signal ground and casing be designed to the standard of full-mesh, but under the situation of some abominable industrial environment (as strong interference), this design standards can not adapt to on-the-spot needs sometimes, may cause some serious consequence (as burning system).So during design, need its system is improved, particularly at jamproof design.
Existing computer system, its Anti-Jamming Technique is to study the Anti-Jamming Technique of electronic circuit emphatically, as: the position arrangement of each subsystem promptly connects up in the Anti-Jamming Technique of bus, the Anti-Jamming Technique of software (as Watch dog timer, input and output software detection, software fault-tolerant etc.), the system, the Anti-Radiation Countermeasures of system, storer Noise Suppression, the instantaneous change of opposing power supply be to the interference of system and system earth etc.Be implemented on common occasion by above these measures, as long as aspects such as manufacturing process, components and parts can be guaranteed further that quality measures is proper, such computer system should be a more stable system in common application scenario.
But; in the above-mentioned system; there is a defective to be; present computer function ground connection and protective ground; power supply ground plays both sides of the street; be that function ground connection links to each other with casing at multiple spot; and the ground wire of casing and power supply; be to meet GB4943-2001 (safety of Information Technology Equipment) by present computing machine standard between the earth point; the control system that its basic demand comes to this is grounded continuous to require the resistance between each earth point can not surpass 0.1 Ω; such system design is in order to allow the better ground connection of controller; prevent to disturb especially power frequency interference, also be not subjected to coupled voltages for the operator; the harm of leakage current.In general application scenario, the earth is a big electric capacity, can well bypass the especially power frequency interference of a lot of interfering energies.But in some occasion, the earth part higher voltage that can be coupled, and be communicated with between function ground connection and the earth, be very easy to burn control system this time, because the control voltage of control system is lower.
And mainly be applied to the industry spot environment based on PC platform industrial control computer, and therefore change its design standards originally, its form that transform floating ground as is strengthened anti-jamming capacity, be necessary.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, adopt multiple technologies to combine, a kind of floating ground anti-interference equipment of anti-interference effective industrial control computer based on the PC platform is provided.
Another object of the present invention is to provide a kind of floating ground anti-interference method based on PC platform industrial control computer.
The present invention adopts following technical method to realize:
A kind of floating ground anti-interference method based on PC platform industrial computer, at least in may further comprise the steps one: (1) designs a cabinet, make system and cabinet modularization, be easy to realize systematically with the electrical isolation of cabinet and adopt a kind of isolated material systematically to isolate with cabinet;
(2) design a Switching Power Supply, its secondary power supply is with reference to not being communicated with between ground and power supply input ground, the housing;
(3) design a kind of electrostatic leakage and prevent ground wire voltage sudden change circuit, static that described circuit energy absorption system accumulates and the sudden change that can prevent external voltage cause the sudden change of controller ground wire voltage.
Above-mentioned three kinds of technological means can be suitable for separately, also can be used in combination.It is even more ideal to be used in combination the technique effect that can reach.
Technology the most key among the present invention is: adopt the combination of some technology, make the floating ground of system, promptly system reference ground and shell ground do not have points of common connection in product, and the computer cabinet housing reliably is connected with the earth, thereby reach jamproof effect.In addition, the present invention also must make newly-designed computer system reach relevant national standard when realizing anti-interference effect.
Said method at object, comprise soft hardware equipment all in the present computer system, the technology that comprises patent of the present invention comprises all soft hardware equipment of present computing machine, comprise cabinet, power supply, mainboard, CPU, internal memory, hard disk, CD-ROM drive, floppy drive, display card, display etc., also comprise the related relevant anti-interference design of the said equipment, as the safety Design of the electronic circuit Anti-interference Design mentioned in the background technology, machine, Software Anti-interference design etc.
A kind of jamproof floatingly equipment based on PC platform industrial computer, comprise cabinet, Switching Power Supply, computing machine electronic system etc., one end of one client link Switching Power Supply 2 of described cabinet 1, the other end of Switching Power Supply 2 connects an end of computing machine electronic system 3 by electric capacity 10, the other end of computing machine electronic system 3 connects electrostatic leakage and prevents a systematically end of voltage jump circuit 4, electrostatic leakage and prevent that systematically the other end of voltage jump circuit 4 connects Switching Power Supply 2.
Described cabinet 1 and computing machine electronic system 2 are modular, are easy to realize systematically the electrical isolation with cabinet like this.In addition, in order to reach better isolation effect, can also isolate mutually by division board 13 between the two.
Described division board is by epoxy resin board, also can be other material.
The inside of described Switching Power Supply 2 is provided with electric capacity 10, to reach jamproof purpose.Switching Power Supply belongs to prior art at this, so no longer further provide the schematic diagram of Switching Power Supply, this isolated ground technology is applied to will help the anti-interference of machine among the Switching Power Supply of computing machine.And in the prior art, some places are called thermally functionally, and protection ground some places are called cold ground with it.
Static that electrostatic leakage and prevent that the systematically design of voltage jump circuit 4 from being again an emphasis of the present invention, described circuit can the absorption system accumulation and the sudden change that can prevent external voltage cause the sudden change of controller ground wire voltage.Described circuit is made up of high-power resistance 11 and high-voltage capacitance 12, an end of a client link high-voltage capacitance 12 of high-power resistance 11.High-power resistance is generally chosen the above resistance of 1w, and high-voltage capacitance to select voltage withstand class for use be 1000V, avoid using oil immersion electric capacity.
After implementing this invention, to disturbing very big occasion, even be coupled with on the ground wire under the big voltage condition, this system can not be interfered yet and can work normally with this floating ground computer system application; More there is not the harm of burning control system.So the popularity of using the computer system on floating ground to use is bigger, the worry that the user is disturbed still less.
[description of drawings]
Fig. 1 is a synoptic diagram of the present invention;
Fig. 2 is the structural representation of cabinet of the present invention;
Fig. 3 is the electrical schematic diagram of Switching Power Supply of the present invention;
Fig. 4 is for electrostatic leakage of the present invention and prevent the systematically electrical schematic diagram of voltage jump circuit.
Referring to Fig. 1,2,3,4.1 is cabinet, and 2 is Switching Power Supply, and 3 is the computing machine electronic system, 4 for electrostatic leakage with prevent systematically voltage jump circuit, 5 is outer cabinet housing, and 6 is Switching Power Supply, and 7 is interior systme supporting platform, 8 is the rear panel line outlet, 9 is rack for disc, and 10 is electric capacity, and 11 is powerful resistance, 12 is high-voltage capacitance, and 13 is division board.
[embodiment]
Referring to Fig. 2.The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 2: by the supporting box that the casing functional requirement of computing machine designs a calculating machine, detail is not described herein, describes the special character of the cabinet design of floating ground computing machine this moment emphatically.The contact resistance of outer cabinet housing 5, Switching Power Supply 6 and rack for disc 9 is designed to less than 0.1 Ω, and outside independent earth point is set above the cabinet housing 5.Contact resistance between interior systme supporting platform 7, the rear panel line outlet 8 is designed to less than 0.1 Ω, can adopt thick shielded conductor to be connected between interior systme supporting platform 7, the rear panel line outlet 8 when specifically implementing.When the casing that designs a calculating machine, outside between cabinet housing 5, the interior systme supporting platform 7, adopt epoxy resin board to isolate between outer cabinet housing 5, the rear panel line outlet 8, systme supporting platform 7, rear panel line outlet 8 and outer cabinet housing 5 floating skies in making.For those skilled in the art, as described above can be realized the invention.
The floating ground Switching Power Supply that computing machine adopted coldly and adopt as shown in Figure 3 circuit thermally, other design designs according to the principle of Switching Power Supply, no longer specifically describes here.Shown electric capacity 10 is wanted can anti-enough voltage, and capacity generally adopts Y electric capacity with the high frequency interference degree of being of can releasing.Because isolation design coldly and thermally, select to consider enough withstand voltage during the requirement.Be design basis generally with the 3000V ac voltage withstanding.
Interior systme supporting platform 7, rear panel line outlet 8 and outside between the cabinet housing 5, Switching Power Supply 6, rack for disc 9 structures, connect the circuit shown in figure four, purpose is the inner static of releasing, and prevents the voltage jump influence voltage jump systematically of cabinet ground wire.In specific implementation process, consider regulation different of GB17618 and GB17626, the capacitance of circuit is made several specifications of adjusting.Making specification with jumper switch selects.
Jamproof emphasis point of the present invention is a circulation isolator.After tested, the present invention's isolation voltage that can bear is 1000VDC.
Claims (7)
1. jamproof floatingly equipment based on PC platform industrial computer, comprise cabinet, Switching Power Supply, computing machine electronic system, it is characterized in that an end of described cabinet (1) connects an end of Switching Power Supply (2), the other end of Switching Power Supply (2) connects an end of computing machine electronic system (3) by electric capacity (10), the other end of computing machine electronic system (3) connects electrostatic leakage and prevents a systematically end of voltage jump circuit (4), electrostatic leakage and prevent that systematically the other end of voltage jump circuit (4) connects Switching Power Supply (2).
2. a kind of jamproof floatingly equipment based on PC platform industrial computer according to claim 1 is characterized in that described cabinet (1) and computing machine electronic system (3) are modular, and isolates mutually by division board (13) between the two.
3. a kind of jamproof floatingly equipment based on PC platform industrial computer according to claim 2 is characterized in that the material that described division board adopts is an epoxy resin board.
4. a kind of jamproof floatingly equipment based on PC platform industrial computer according to claim 1 is characterized in that the inside of described Switching Power Supply (2) is provided with electric capacity (10).
5. a kind of jamproof floatingly equipment according to claim 1 based on PC platform industrial computer, it is characterized in that electrostatic leakage and prevent that systematically the voltage jump circuit is made up of resistance (11) and electric capacity (12), an end of resistance (11) connects an end of electric capacity (12).
6. a kind of jamproof floatingly equipment based on PC platform industrial computer according to claim 5 is characterized in that described resistance is that power is the above resistance of 1w.
7. a kind of jamproof floatingly equipment based on PC platform industrial computer according to claim 5 is characterized in that described electrostatic leakage and prevents that systematically the voltage withstand class of the electric capacity of voltage jump circuit is 1000V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100309576A CN100409141C (en) | 2006-09-08 | 2006-09-08 | Antiinterference method of floatign ground of industrial computer based on PC platform, and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100309576A CN100409141C (en) | 2006-09-08 | 2006-09-08 | Antiinterference method of floatign ground of industrial computer based on PC platform, and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1916817A CN1916817A (en) | 2007-02-21 |
| CN100409141C true CN100409141C (en) | 2008-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100309576A Expired - Fee Related CN100409141C (en) | 2006-09-08 | 2006-09-08 | Antiinterference method of floatign ground of industrial computer based on PC platform, and device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436300B (en) * | 2010-09-29 | 2016-05-04 | 研祥智能科技股份有限公司 | A kind of computer and floating ground project organization thereof |
| CN102595815B (en) * | 2012-02-16 | 2015-09-09 | 华为技术有限公司 | One exempts from ground networks punch-out equipment cabinet |
| CN103580011A (en) * | 2012-07-19 | 2014-02-12 | 北京超思电子技术股份有限公司 | Electronic system, electronic equipment and electromagnetic protection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058509U (en) * | 1989-11-11 | 1990-06-20 | 江苏人民广播电台 | Computer real-time monitoring interface device |
| JP2002137849A (en) * | 2000-11-02 | 2002-05-14 | Canon Inc | Sheet carrying device and recording device |
| CN2706976Y (en) * | 2004-05-21 | 2005-06-29 | 华为技术有限公司 | Floating apparatus interface isolator |
-
2006
- 2006-09-08 CN CNB2006100309576A patent/CN100409141C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058509U (en) * | 1989-11-11 | 1990-06-20 | 江苏人民广播电台 | Computer real-time monitoring interface device |
| JP2002137849A (en) * | 2000-11-02 | 2002-05-14 | Canon Inc | Sheet carrying device and recording device |
| CN2706976Y (en) * | 2004-05-21 | 2005-06-29 | 华为技术有限公司 | Floating apparatus interface isolator |
Non-Patent Citations (4)
| Title |
|---|
| 接地线对微机继电保护设备的抗扰度影响试验分析. 张梅，傅静波，江峰，马文玲，梁志成.舰船电子工程，第25卷第4期. 2005 |
| 接地线对微机继电保护设备的抗扰度影响试验分析. 张梅，傅静波，江峰，马文玲，梁志成.舰船电子工程，第25卷第4期. 2005 * |
| 计算机系统接地问题研究. 李光.工业控制计算机，第4期. 1997 |
| 计算机系统接地问题研究. 李光.工业控制计算机，第4期. 1997 * |
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| Publication number | Publication date |
|---|---|
| CN1916817A (en) | 2007-02-21 |
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Granted publication date: 20080806 Termination date: 20190908 |