WO2015085488A1 - 一种防干扰装置及方法 - Google Patents
一种防干扰装置及方法 Download PDFInfo
- Publication number
- WO2015085488A1 WO2015085488A1 PCT/CN2013/088990 CN2013088990W WO2015085488A1 WO 2015085488 A1 WO2015085488 A1 WO 2015085488A1 CN 2013088990 W CN2013088990 W CN 2013088990W WO 2015085488 A1 WO2015085488 A1 WO 2015085488A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- interference
- signal
- module
- control module
- connecting line
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 86
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 6
- 230000005670 electromagnetic radiation Effects 0.000 abstract description 16
- 230000011664 signaling Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 22
- 238000010586 diagram Methods 0.000 description 9
- 230000005684 electric field Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0098—Shielding materials for shielding electrical cables
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0064—Earth or grounding circuit
Definitions
- the present invention relates to the field of electronic technologies, and in particular, to an interference prevention device and method. Background technique
- the whole machine equipment is integrated with more and more electronic and electrical equipment.
- more and more electronic components are integrated in the interior of the car.
- EMC Electromagnetic Compatibility
- Embodiments of the present invention provide an anti-interference device and method, which can reduce electromagnetic interference generated by a circuit at low cost and effectively.
- the first aspect provides an anti-interference device, including: an anti-interference module and a control module; and the control module is configured to send a working signal to the anti-interference module;
- the anti-interference module is configured to receive the working signal, and control an operating state of the first component according to the working signal, where the first component and the control module are connected by using at least one first connecting line
- the at least one first connecting line is separated into at least two segments by the anti-interference material, and the anti-interference material is connected to the ground;
- the anti-interference module is further configured to send a reflow signal to the control module, where the reflow signal flows to the control module through the anti-interference material.
- the anti-interference device further includes: a connector connecting the anti-interference module and the control module; The connector is configured to receive the working signal, and send the working signal to the anti-interference module.
- the anti-interference material is a shielding interference material
- the at least one first connection line is protected by the Interference material wrapping, the length of the interference preventing material being less than the length of the at least one first connecting line.
- the shielding interference material comprises at least one of the following materials: copper foil, aluminum foil, silver foil, conductive cloth or shielding coating.
- the anti-interference material is pasted on a set position of the at least one first connecting line.
- the anti-interference material is a conductive double-sided tape.
- an anti-interference method including:
- a return signal is sent to the control device, the return signal flowing through the anti-interference material to the control device.
- the working signal sent by the receiving control device is specifically: receiving an operating signal sent by the control device through a connector.
- the anti-interference material is a shielding interference material
- the at least one first connection line is protected by the Interference material wrapping, the length of the interference preventing material being less than the length of the at least one first connecting line.
- the shielding interference material comprises at least one of the following materials: copper foil, aluminum foil, silver foil, conductive cloth or shielding coating.
- the anti-interference material is pasted on a set position of the at least one first connecting line.
- the anti-interference material is a conductive double-sided tape.
- Figure 1 is a schematic diagram of electromagnetic radiation interference generated in a circuit
- FIG. 2 is a structural diagram of an anti-interference device according to an embodiment of the present invention.
- FIG. 3 is a schematic diagram of an anti-interference device for preventing electromagnetic interference radiation according to an embodiment of the present invention
- FIG. 4 is a schematic diagram of an anti-interference device for preventing electromagnetic interference radiation according to another embodiment of the present invention.
- Figure 5 is a schematic diagram of anti-interference processing for the anti-interference device
- FIG. 6 is a flowchart of a method for preventing an interference according to an embodiment of the present invention. detailed description
- the control module 1 is connected to the first component 3 through a connector 2, and the control module 1 provides a control signal and a data signal for the first component 3 to control the first component.
- the first component 3 can be an LCD, and the control module 1 controls the LCD for display.
- the control module 1 controls the LCD for display.
- the return signal itself looks for the path with lower impedance and returns to the source, that is, the control module 1, which causes the return path to be uncontrollable, and the area of the return loop 7 is large, so the return signal between the first element 3 and the connector 2 is generated.
- the electromagnetic interference radiation is large.
- electromagnetic radiation includes differential mode radiation and common mode radiation.
- H 1 I 1 A 1 (4nD 1 )(A/m)
- ⁇ 2 ⁇ 2 ⁇ 2 ⁇ 2 / ( ⁇ 2 3 ⁇ 4 2) (V / m)
- I 1 2 is the loop current
- AA 2 is the loop area
- DD 2 is the distance from the observation point to the loop
- Z 0l and Zo 2 are the impedances of free space
- ⁇ 2 The wavelength corresponding to the current frequency; respectively, the magnetic field strength and the electric field strength of the near-field region of the differential mode radiation
- ⁇ 2 and ⁇ 2 are the electric field strengths of the near-field region and the far-field region of the differential mode radiation, respectively.
- H 3 I 3 L 3 /(1 ⁇ 2D 3 2 ) (A/m)
- ⁇ 4 ⁇ 4 ⁇ 4 ⁇ (2 ⁇ 4 ⁇ 4) (V / m)
- 1 3 and 14 are loop currents; L 3 and L 4 are conductor lengths; D 3 and D 4 are distances from the observation point to the loop; Zo 3 and Zo 4 are The impedance of free space; ⁇ 3 and ⁇ 4 are the wavelengths corresponding to the current frequency; ⁇ 3 and ⁇ 3 are the magnetic field strength and electric field strength of the near-field region of the common mode radiation respectively; ⁇ 4 and ⁇ 4 are respectively common mode radiation Magnetic field strength and electric field strength in the far field region. It can be seen from the above formulas (1)-(8) that the differential mode radiation of the near-field region and the far-field region can be reduced by reducing the loop current, the wavelength or the loop area, and the loop current can also be reduced. Wavelength or wire length to reduce common mode radiation in the near and far field regions. However, the two methods of reducing the loop circuit and the wavelength have certain limitations in practice.
- the embodiment of the present invention provides an anti-interference device and a method.
- the figure is a structural diagram of an anti-interference device according to an embodiment of the present invention.
- the anti-interference device 20 includes: a control module 1 and an anti-interference module. 9.
- the control module 1 is used to send a working signal to the anti-interference module 9, which may be a control signal and/or a data signal.
- the anti-interference module 9 is configured to receive the working signal, and control the anti-interference module according to the working signal
- the first component 3 and the control module 1 can be connected by one or more connecting wires 4.
- the anti-interference module 9 is also used to send a reflow signal to the control module 1.
- FIG. 3 is a schematic diagram of an anti-interference device for preventing electromagnetic interference radiation according to an embodiment of the present invention.
- the control module 1 sends a control signal and/or a data signal to the anti-interference module 9, and the anti-interference module 9 receives the control signal and/or the data signal to control the operating state of the first component 3, for example, controlling the first component 3 according to the control signal. Turning on or off, controlling the output of the data signal on the first component 3, and the like.
- FIG. 1 sends a control signal and/or a data signal to the anti-interference module 9
- the anti-interference module 9 receives the control signal and/or the data signal to control the operating state of the first component 3, for example, controlling the first component 3 according to the control signal. Turning on or off, controlling the output of the data signal on the first component 3, and the like.
- the anti-interference module 9 includes a first component 3, a connecting wire 4 and an anti-interference material 10, and the anti-interference material 10 is used to divide the connecting wire 4 into at least two segments, and the anti-interference material 10 is connected to the ground 11, and the reflow signal is Divided into two return loops 12 and 13, the return signal in the return loop 12 flows through the anti-interference material 10 and the ground 11 to the control module 1, and the return signal in the return loop 13 flows through the ground 11 to the control module 1.
- the areas of the reflow loops 12 and 13 of the present embodiment are respectively reduced, and according to the above formula, the reflow signal is reduced. The electromagnetic radiation generated is disturbed.
- FIG. 4 is a schematic diagram of an anti-interference device for preventing electromagnetic interference radiation according to another embodiment of the present invention.
- the first component 3 in the anti-interference device is connected to the control module 1 through the connector 2, and the control signal and/or data signal sent by the control module 1 is sent to the connector 2 through the connector 2.
- the first component 3, the connecting line 4 between the first component 3 and the connector 2 is separated into at least two sections by the interference preventing material 10, the interference preventing material 10 is connected to the ground 11, and the return signal is divided into at least two return loops.
- the return signal in the return loop 14 flows through the anti-interference material 10 and the ground 11 to the control module 1, and the return signal in the return loop 15 flows through the ground 11 to the control module 1.
- Phase The areas of the flow loops 14 and 15 are respectively reduced, and according to the above formula, the electromagnetic radiation interference generated by the return signal is reduced.
- the interference preventing material may be a shielding interference material comprising: any one of copper foil, aluminum foil, silver foil, conductive cloth or shielding coating.
- the shielding interference material 10 wraps a small segment or a plurality of small segments of all the connecting wires 4, and the length of the shielding interference material is smaller than the length of the connecting wire 4, first The element 3 is inserted into the connector 2 shown in Fig. 4 through the connecting wire gold finger 16. And the shielding interference material 10 is grounded.
- shielded interference materials for wrapping and separating the connecting lines not only reduces the area of the return loop, but also reduces the electromagnetic radiation interference generated by the return signal; and the shielding interference material can further reduce the electromagnetic radiation interference; And the shielding interference material only needs to wrap a small section or a plurality of small sections of the connecting line, and the anti-interference cost is low.
- the anti-interference material may be a conductive double-sided tape.
- a conductive double-sided tape For example, in FIG. 3 or FIG. 4, one side of the conductive double-sided tape is pasted on one set position of all the connecting lines 4, and the other side is pasted 11 Thereby, the connection line 4 is separated, and the signal of the return loop 12 or 14 flows to the control module 1 through the conductive double-sided tape and the ground.
- the conductive double-sided tape is used for anti-interference, which can effectively reduce the electromagnetic radiation interference, and the operation unit is simple, and the anti-interference cost is low.
- ground in the embodiment of the present invention should not be construed as a single board or a structure, but should be in a broad sense.
- the manner of grounding is also not limited to the embodiment mentioned in the embodiment.
- the anti-interference device reduces the loop area of the reflow signal by separating the connection line between the control module and the anti-interference module by using an anti-interference material, and can reduce the circuit in a low-cost manner and effectively. The electromagnetic radiation generated is disturbed.
- FIG. 6 is a flowchart of a method for preventing an interference according to an embodiment of the present invention. The method includes the following steps:
- Step S101 Receive an operation signal sent by the control device.
- control devices that control the operation of the various components. These components are connected to the control device through a connecting line. Generally, due to the large distance between the control device and the components, the connecting wires are relatively large. Large external interference radiation space, the return signal itself finds the path with lower impedance back to the source, that is, the control device, resulting in uncontrollable return path and large return loop area. The electromagnetic interference radiation generated by the return signal between these components and the control device is large.
- the operational signal transmitted by the control device is received, and the operational signal may be a control signal and/or a data signal.
- Step S102 controlling an operating state of the first component according to the working signal, wherein the first component and the control device are connected by at least one first connecting line, and the at least one first connecting line is anti-interference
- the material is at least divided into two segments, and the interference preventing material is connected to the ground.
- the operating state of the working element is controlled based on the received working signal, for example, controlling the opening or closing of the first component according to the control signal, controlling the output of the data signal on the first component, and the like.
- the working element and the control device are connected by one or more connecting wires, and the connecting wire is separated into at least two sections by using an anti-interference material, and the anti-interference material is connected to the ground.
- Step S103 sending a reflow signal to the control device, where the reflow signal flows to the control device through the anti-interference material.
- a return signal is sent to the control device, the return signal being separated by the anti-interference material into at least two return loops, and the return signal in the return loop flows through the anti-interference material and the ground to the control device.
- the area of the recirculation loop of the example is reduced, respectively, according to the above formula, thereby reducing the electromagnetic radiation interference generated by the recirculation signal.
- step S101 is specifically:
- the interference preventing material may be a shielding interference material
- the interference shielding material includes: any one of copper foil, aluminum foil, silver foil, conductive cloth or shielding coating.
- the shielding interference material 10 wraps a small segment or a plurality of small segments of all the connecting wires 4, and the length of the shielding interference material is smaller than the length of the connecting wire 4, first The component 3 is inserted into the connector 2 shown in Fig. 4 through the connecting wire gold finger 16. And shielding the interference material 10 to be grounded.
- shielded interference materials for wrapping and separating the connecting lines not only reduces the area of the return loop, but also reduces the electromagnetic radiation interference generated by the return signal; and the shielding interference material can further reduce the electromagnetic radiation interference; And the shielding interference material only needs to wrap a small section or a plurality of small sections of the connecting line, and the anti-interference cost is low.
- the anti-interference material may be a conductive double-sided tape, for example, in FIG. 3 or In 4, the conductive double-sided tape is pasted on one of the set positions of all the connecting wires 4, and the other side is pasted with the ground 11, thereby separating the connecting wires 4, and the signal of the returning loop 12 or 14 passes through the conductive double-sided tape and the ground flow.
- Control module 1 The conductive double-sided tape is used for anti-interference, which can effectively reduce the electromagnetic radiation interference, and the operation unit is simple, and the anti-interference cost is low.
- ground in the embodiment of the present invention should not be construed as a single board or a structure, but should be in a broad sense.
- the manner of grounding is also not limited to the embodiment mentioned in the embodiment.
- the anti-interference method provided by the embodiment of the present invention reduces the loop area of the reflow signal by separating the connection line between the control module and the anti-interference module by using an anti-interference material, and can reduce the circuit in a low-cost manner and effectively. The electromagnetic radiation generated is disturbed.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Patch Boards (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380005193.3A CN104170539B (zh) | 2013-12-10 | 2013-12-10 | 一种防干扰装置及方法 |
JP2015551960A JP6085373B2 (ja) | 2013-12-10 | 2013-12-10 | 干渉防止装置及び方法 |
EP13883347.0A EP2897121B1 (en) | 2013-12-10 | 2013-12-10 | Anti-interference apparatus and method |
PCT/CN2013/088990 WO2015085488A1 (zh) | 2013-12-10 | 2013-12-10 | 一种防干扰装置及方法 |
US14/539,795 US9324480B2 (en) | 2013-12-10 | 2014-11-12 | Interference prevention apparatus and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2013/088990 WO2015085488A1 (zh) | 2013-12-10 | 2013-12-10 | 一种防干扰装置及方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/539,795 Continuation US9324480B2 (en) | 2013-12-10 | 2014-11-12 | Interference prevention apparatus and method |
Publications (1)
Publication Number | Publication Date |
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WO2015085488A1 true WO2015085488A1 (zh) | 2015-06-18 |
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PCT/CN2013/088990 WO2015085488A1 (zh) | 2013-12-10 | 2013-12-10 | 一种防干扰装置及方法 |
Country Status (5)
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US (1) | US9324480B2 (zh) |
EP (1) | EP2897121B1 (zh) |
JP (1) | JP6085373B2 (zh) |
CN (1) | CN104170539B (zh) |
WO (1) | WO2015085488A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118112360A (zh) * | 2024-04-28 | 2024-05-31 | 广东技术师范大学 | 一种电动汽车动态工况下电磁干扰测试系统及方法 |
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US20090231325A1 (en) * | 2008-03-13 | 2009-09-17 | Hitachi Displays, Ltd. | Display device |
US20120200777A1 (en) * | 2011-02-07 | 2012-08-09 | Nlt Technologies, Ltd. | Video signal processing circuit, video signal processing method used in same, and image display device using same |
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2013
- 2013-12-10 JP JP2015551960A patent/JP6085373B2/ja active Active
- 2013-12-10 EP EP13883347.0A patent/EP2897121B1/en active Active
- 2013-12-10 CN CN201380005193.3A patent/CN104170539B/zh active Active
- 2013-12-10 WO PCT/CN2013/088990 patent/WO2015085488A1/zh active Application Filing
-
2014
- 2014-11-12 US US14/539,795 patent/US9324480B2/en active Active
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US20090231325A1 (en) * | 2008-03-13 | 2009-09-17 | Hitachi Displays, Ltd. | Display device |
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CN118112360A (zh) * | 2024-04-28 | 2024-05-31 | 广东技术师范大学 | 一种电动汽车动态工况下电磁干扰测试系统及方法 |
Also Published As
Publication number | Publication date |
---|---|
EP2897121A8 (en) | 2015-09-16 |
CN104170539B (zh) | 2017-03-15 |
US20150162115A1 (en) | 2015-06-11 |
JP6085373B2 (ja) | 2017-02-22 |
EP2897121B1 (en) | 2017-10-18 |
CN104170539A (zh) | 2014-11-26 |
US9324480B2 (en) | 2016-04-26 |
JP2016506084A (ja) | 2016-02-25 |
EP2897121A1 (en) | 2015-07-22 |
EP2897121A4 (en) | 2016-08-03 |
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