WO2015085488A1 - 一种防干扰装置及方法 - Google Patents

一种防干扰装置及方法 Download PDF

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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
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WIPO (PCT)
Prior art keywords
interference
signal
module
control module
connecting line
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Application number
PCT/CN2013/088990
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English (en)
French (fr)
Inventor
张连明
刘月
艾柯
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to JP2015551960A priority Critical patent/JP6085373B2/ja
Priority to PCT/CN2013/088990 priority patent/WO2015085488A1/zh
Priority to CN201380005193.3A priority patent/CN104170539B/zh
Priority to EP13883347.0A priority patent/EP2897121B1/en
Priority to US14/539,795 priority patent/US9324480B2/en
Publication of WO2015085488A1 publication Critical patent/WO2015085488A1/zh

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00Communication cables or conductors
    • H01B11/18Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073Shielding materials
    • H05K9/0098Shielding materials for shielding electrical cables
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0064Earth 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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Patch Boards (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种防干扰装置及方法。其中的防干扰装置(20)包括:防干扰模块(9)、控制模块(1);所述控制模块(1),用于向所述防干扰模块(9)发送工作信号;所述防干扰模块(9),用于接收所述工作信号,并根据所述工作信号,控制第一元件(3)的工作状态,所述第一元件(3)与所述控制模块(1)通过至少一根第一连接线(4)连接,所述至少一根第一连接线(4)被防干扰材料(10)至少分隔成两段,所述防干扰材料(10)与地(11)连接;所述防干扰模块(9),还用于向所述控制模块(1)发送回流信号,所述回流信号通过所述防干扰材料(10)流向所述控制模块(1)。还公开了相应的防干扰方法。采用该种防干扰装置及方法,通过采用防干扰材料(10)分隔控制模块(1)和防干扰模块(9)之间的连接线(4),减小了回流信号的环路面积,可以低成本且有效地减小电路中产生的电磁辐射干扰。

Description

一种防干扰装置及方法
技术领域
本发明涉及电子技术领域, 尤其涉及一种防干扰装置及方法。 背景技术
现在的整机设备融合了越来越多的电子电器设备,例如汽车内部中融合了 越来越多的电子零部件,在狭小的空间环境内,各电子电器设备如何做到互相 兼容,在保证既不受其他电子电器设备的运转产生的干扰,导致自身工作故障 或异常,也不受自己的运转导致其他电子电器设备受到干扰, 而出现故障或异 常, 已成为所有汽车企业及相关供应商所要面对的重要问题。 为保证整机产品 的质量以及各电子零部件能正常运转,汽车企业均制定了各自的的非常严格的 电磁兼容性 (Electro Magnetic Compatibility, EMC)标准规范来要求其供应商提 供较低辐射干扰水平的电子零部件。 例如, 车载产品中液晶显示器 (Liquid Crystal Display , LCD)模组产生的干扰较强,会导致整机产品不能满足汽车企 业的 EMC指标要求。
然而, 现有技术中尚没有低成本且防电磁辐射干扰效果好的防干扰技术。 发明内容
本发明实施例提供了一种防干扰装置及方法,可以低成本且有效地减少电 路产生的电磁辐射干扰。
第一方面, 提供了一种防干扰装置, 包括: 防干扰模块、 控制模块; 所述控制模块, 用于向所述防干扰模块发送工作信号;
所述防干扰模块, 用于接收所述工作信号, 并根据所述工作信号, 控制第 一元件的工作状态,所述第一元件与所述控制模块通过至少一根第一连接线连 接, 所述至少一根第一连接线被防干扰材料至少分隔成两段, 所述防干扰材料 与地连接;
所述防干扰模块,还用于向所述控制模块发送回流信号, 所述回流信号通 过所述防干扰材料流向所述所述控制模块。
在第一种可能的实现方式中, 所述防干扰装置还包括: 连接所述防干扰模 块和所述控制模块的连接器; 所述连接器, 用于接收所述工作信号, 并将所述工作信号发送给所述防干 扰模块。
结合第一方面或第一方面的第一种可能的实现方式,在第二种可能的实现 方式中, 所述防干扰材料为屏蔽干扰材料, 所述至少一根第一连接线被所述防 干扰材料包裹, 所述防干扰材料的长度小于所述至少一根第一连接线的长度。
结合第一方面的第二种可能的实现方式,在第三种可能的实现方式中, 所 述屏蔽干扰材料包括以下至少一种材料: 铜箔、 铝箔、 银箔、 导电布或屏蔽涂 层。
结合第一方面或第一方面的第一种可能的实现方式,在第四种可能的实现 方式中, 所述防干扰材料粘贴在所述至少一根第一连接线的设定位置上。
结合第一方面的第四种可能的实现方式,在第五种可能的实现方式中, 所 述防干扰材料为导电双面胶。 第二方面, 提供了一种防干扰方法, 包括:
接收控制装置发送的工作信号;
根据所述工作信号控制第一元件的工作状态, 其中,所述第一元件与所述 控制装置通过至少一根第一连接线连接,所述至少一根第一连接线被防干扰材 料至少分隔成两段, 所述防干扰材料与地连接;
向所述控制装置发送回流信号,所述回流信号通过所述防干扰材料流向所 述控制装置。
在第一种可能的实现方式中,所述接收控制装置发送的工作信号,具体为: 接收所述控制装置通过连接器发送的工作信号。
结合第二方面或第二方面的第一种可能的实现方式,在第二种可能的实现 方式中, 所述防干扰材料为屏蔽干扰材料, 所述至少一根第一连接线被所述防 干扰材料包裹, 所述防干扰材料的长度小于所述至少一根第一连接线的长度。
结合第二方面的第二种可能的实现方式,在第三种可能的实现方式中, 所 述屏蔽干扰材料包括以下至少一种材料: 铜箔、 铝箔、 银箔、 导电布或屏蔽涂 层。
结合第二方面或第二方面的第一种可能的实现方式,在第四种可能的实现 方式中, 所述防干扰材料粘贴在所述至少一根第一连接线的设定位置上。 结合第二方面的第四种可能的实现方式,在第五种可能的实现方式中, 所 述防干扰材料为导电双面胶。 采用本发明实施例提供的一种防干扰装置及方法的技术方案,通过采用防 干扰材料分隔控制模块和防干扰模块之间的连接线,减小了回流信号的环路面 积, 可以低成本且有效地减少电路中产生的电磁辐射干扰。 附图说明
为了更清楚地说明本发明实施例的技术方案,下面将对实施例中所需要使 用的附图作筒单地介绍,显而易见地, 下面描述中的附图仅仅是本发明的一些 实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可 以根据这些附图获得其他的附图。
图 1 为电路中产生的电磁辐射干扰示意图;
图 2为本发明实施例提供的一种防干扰装置的结构图;
图 3 为本发明实施例提供的一种防干扰装置进行防电磁干扰辐射的原理 示意图;
图 4 为本发明另一实施例提供的一种防干扰装置进行防电磁干扰辐射的 原理示意图;
图 5为对防干扰装置进行防干扰处理的示意图;
图 6为本发明实施例提供的一种防干扰方法的方法流程图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
图 1为电路中产生的电磁辐射干扰示意图,在图 1中,控制模块 1通过连 接器 2连接第一元件 3 , 控制模块 1为第一元件 3提供控制信号和数据信号, 以控制第一元件进行工作, 例如, 第一元件 3可以为 LCD, 控制模块 1控制 LCD进行显示。 一般情况下, 由于连接器 2与第一元件 3之间的距离较大, 第一元件 3和连接器 2之间的回流信号 5产生的电磁干扰辐射 6较大,而现有 技术中不对该回流信号产生的电磁干扰辐射做任何处理,连接线上有较大的对 外干扰辐射空间, 回流信号自己寻找阻抗较低的路径回到源头即控制模块 1 , 导致回流路径无法控制、 回流环路 7的面积较大, 所以第一元件 3和连接器 2 之间的回流信号产生的电磁干扰辐射较大。
通常电磁辐射包括差模辐射和共模辐射。
用电流环路模型来分析差模辐射,可分别得出近场区域和远场区域的辐射 电磁场的计算公式如下:
近场区 i或:
H1=I1A1(4nD1 )(A/m)
Figure imgf000006_0001
远场区域:
Figure imgf000006_0002
Ε2=Ζο2πΙ2Α2/(λ2¾2) (V/m)
在公式 (1 )-(4)中, I 12为环路电流; A A2为环路面积; D D2为观测 点到环路的距离; Z0l、 Zo2为自由空间的阻抗; λ2为电流频率所对应的波 长; 、 分别为差模辐射的近场区域的磁场强度和电场强度; Η2、 Ε2分别 为差模辐射的近场区域和远场区域的电场强度。
同样, 用电流环路模型分析共模辐射, 分别得出近场区域和远场区域的辐 射电磁场的计算公式如下:
近场区 i或:
H3=I3L3/(½D3 2) (A/m)
E3=Zo3I3L3 3/(87r2D3 3) (V/m)
远场区域:
Figure imgf000006_0003
Ε4=Ζο4Ι4ΐν(2λ4ϋ4) (V/m)
在公式 (5)-(8)中, 13、 14为环路电流; L3、 L4为导线长度; D3、 D4为观测 点到环路的距离; Zo3、 Zo4为自由空间的阻抗; λ3、 λ4为电流频率所对应的波 长; Η3、 Ε3分别为共模辐射的近场区域的磁场强度和电场强度; Η4、 Ε4分别 为共模辐射的远场区域的磁场强度和电场强度。 由上面的公式 (1)-(8)可知, 可以通过减小环路电流、 波长或环路面积来减 小近场区域和远场区域的差模辐射,也可以通过减小环路电流、 波长或导线长 度来减小近场区域和远场区域的共模辐射。但减小环路电路和波长这两种方法 在实践中都有一定的局限性。
本发明实施例提供一种防干扰装置及方法,图 为本发明实施例提供的一 种防干扰装置的结构图, 如图 2所示, 该防干扰装置 20包括: 控制模块 1和 防干扰模块 9。
控制模块 1用于向防干扰模块 9发送工作信号,该工作信号可以是控制信 号和 /或数据信号。
防干扰模块 9用于接收该工作信号, 并根据该工作信号,控制防干扰模块
9中的第一元件 3的工作状态, 第一元件 3与控制模块 1之间可以通过一根或 多根连接线 4连接。 防干扰模块 9还用于向控制模块 1发送回流信号。
图 3 为本发明实施例提供的一种防干扰装置进行防电磁干扰辐射的原理 示意图。 控制模块 1向防干扰模块 9发送控制信号和 /或数据信号, 防干扰模 块 9接收该控制信号和 /或数据信号, 控制第一元件 3的工作状态, 例如, 根 据控制信号控制第一元件 3的开启或关闭,控制数据信号在第一元件 3上的输 出等。 图 3中, 防干扰模块 9包括第一元件 3、 连接线 4和防干扰材料 10, 采 用防干扰材料 10将连接线 4至少分隔成两段, 防干扰材料 10与地 11连接, 回流信号被分隔成两个回流环路 12和 13, 回流环路 12中的回流信号通过防 干扰材料 10和地 11流向控制模块 1 , 回流环路 13中的回流信号通过地 11流 向控制模块 1。 相比图 1所示的现有技术中不作防干扰处理的回流环路 7的面 积, 本实施例的回流环路 12和 13的面积分别减小了, 根据上述公式, 从而减 小了回流信号产生的电磁辐射干扰。
图 4 为本发明另一实施例提供的一种防干扰装置进行防电磁干扰辐射的 原理示意图。 与图 3不同的是, 在图 4中, 该防干扰装置中的第一元件 3通过 连接器 2与控制模块 1连接, 控制模块 1发送的控制信号和 /或数据信号通过 连接器 2发送给第一元件 3, 第一元件 3与连接器 2之间的连接线 4被防干扰 材料 10至少分隔成两段, 防干扰材料 10与地 11连接, 回流信号被分隔成至 少两个回流环路 14和 15, 回流环路 14中的回流信号通过防干扰材料 10和地 11流向控制模块 1 , 回流环路 15中的回流信号通过地 11流向控制模块 1。 相 流环路 14和 15的面积分别减小了,根据上述公式,从而减小了回流信号产生 的电磁辐射干扰。
在本发明另一实施例中, 防干扰材料可以是屏蔽干扰材料, 该干扰屏蔽材 料包括: 铜箔、 铝箔、 银箔、 导电布或屏蔽涂层中的任一种。 如图 5所示, 为 对防干扰装置进行防干扰处理的示意图, 将屏蔽干扰材料 10包裹所有连接线 4的一小段或多个小段, 屏蔽干扰材料的长度小于连接线 4的长度, 第一元件 3通过连接线金手指 16***图 4所示的连接器 2。 并且屏蔽干扰材料 10做接 地处理。采用屏蔽干扰材料进行包裹和分隔连接线, 不仅减小了回流环路的面 积,从而减小了回流信号产生的电磁辐射干扰; 且屏蔽干扰材料还可以起到进 一步减小电磁辐射干扰的作用;且屏蔽干扰材料仅需包裹连接线的一小段或多 个小段, 防干扰成本低。
作为另一种实施方式, 防干扰材料可以是导电双面胶, 例如, 在图 3或图 4中, 导电双面胶一面粘贴在所有连接线 4的一个设定位置上, 另一面粘贴地 11 , 从而分隔了连接线 4, 回流环路 12或 14的信号通过导电双面胶和地流向 控制模块 1。 采用导电双面胶防干扰, 可有效地减小电磁辐射干扰, 且操作筒 单, 防干扰成本低。
值得说明的是,本发明实施例中的地不应被局限地理解为单板地或结构地 等, 而应为一种广泛意义上的地。接地的方式也并不局限于本实施例中提到的 实施方式。
可见, 本发明实施例提供的防干扰装置,通过采用防干扰材料分隔控制模 块和防干扰模块之间的连接线, 减小了回流信号的环路面积, 可以低成本地且 有效地减少电路中产生的电磁辐射干扰。
请参阅图 6, 为本发明实施例提供的一种防干扰方法的方法流程图。 该方 法包括以下步骤:
步骤 S101 , 接收控制装置发送的工作信号。
在电子电器设备中, 一般都有一个或多个控制装置控制各个元件的工作, 这些元件与控制装置通过连接线连接,一般由于控制装置与这些元件之间的距 离较大, 连接线上有较大的对外干扰辐射空间, 回流信号自己寻找阻抗较低的 路径回到源头即控制装置, 导致回流路径无法控制、 回流环路的面积较大, 所 以这些元件和控制装置之间的回流信号产生的电磁干扰辐射较大。
在本发明实施例中,接收控制装置发送的工作信号, 该工作信号可以是控 制信号和 /或数据信号。
步骤 S102, 根据所述工作信号控制第一元件的工作状态, 其中, 所述第 一元件与所述控制装置通过至少一根第一连接线连接,所述至少一根第一连接 线被防干扰材料至少分隔成两段, 所述防干扰材料与地连接。
根据接收到的工作信号, 控制工作元件的工作状态, 例如, 根据控制信号 控制第一元件的开启或关闭,控制数据信号在第一元件上的输出等。 工作元件 与控制装置之间通过一根或多根连接线连接,采用防干扰材料将连接线至少分 隔成两段, 防干扰材料与地连接。
步骤 S103 , 向所述控制装置发送回流信号, 所述回流信号通过所述防干 扰材料流向所述控制装置。
向控制装置发送回流信号,回流信号被防干扰材料分隔成至少两个回流环 路, 回流环路中的回流信号通过防干扰材料和地流向控制装置。 例的回流环路的面积分别减小了,根据上述公式,从而减小了回流信号产生的 电磁辐射干扰。
进一步地, 工作元件还可以通过连接器与控制装置连接, 步骤 S101具体 为:
接收控制装置通过连接器发送的工作信号。
作为一种实施方式, 防干扰材料可以是屏蔽干扰材料, 该干扰屏蔽材料包 括: 铜箔、 铝箔、 银箔、 导电布或屏蔽涂层中的任一种。 如图 5所示, 为对防 干扰装置进行防干扰处理的示意图, 将屏蔽干扰材料 10包裹所有连接线 4的 一小段或多个小段, 屏蔽干扰材料的长度小于连接线 4 的长度, 第一元件 3 通过连接线金手指 16***图 4所示的连接器 2。 并且屏蔽干扰材料 10做接地 处理。采用屏蔽干扰材料进行包裹和分隔连接线,不仅减小了回流环路的面积, 从而减小了回流信号产生的电磁辐射干扰;且屏蔽干扰材料还可以起到进一步 减小电磁辐射干扰的作用;且屏蔽干扰材料仅需包裹连接线的一小段或多个小 段, 防干扰成本低。
作为另一种实施方式, 防干扰材料可以是导电双面胶, 例如, 在图 3或图 4中, 导电双面胶一面粘贴在所有连接线 4的一个设定位置上, 另一面粘贴地 11 , 从而分隔了连接线 4, 回流环路 12或 14的信号通过导电双面胶和地流向 控制模块 1。 采用导电双面胶防干扰, 可有效地减小电磁辐射干扰, 且操作筒 单, 防干扰成本低。
值得说明的是,本发明实施例中的地不应被局限地理解为单板地或结构地 等, 而应为一种广泛意义上的地。接地的方式也并不局限于本实施例中提到的 实施方式。
可见, 本发明实施例提供的防干扰方法,通过采用防干扰材料分隔控制模 块和防干扰模块之间的连接线, 减小了回流信号的环路面积, 可以低成本地且 有效地减少电路中产生的电磁辐射干扰。
需要说明的是, 对于前述的方法实施例, 为了筒单描述, 故将其都表述为 一系列的动作组合,但是本领域技术人员应该知悉, 本发明并不受所描述的动 作顺序的限制, 因为根据本发明, 某些步骤可以采用其他顺序或者同时进行。 其次, 本领域技术人员也应该知悉,说明书中所描述的实施例均属于优选实施 例, 所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中,对各个实施例的描述都各有侧重, 某个实施例中没有详 述的部分, 可以参见其他实施例的相关描述。
总之, 以上所述仅为本发明技术方案的较佳实施例而已, 并非用于限定本 发明的保护范围。凡在本发明的精神和原则之内,所作的任何修改、等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求
1、 一种防干扰装置, 其特征在于, 包括: 防干扰模块、 控制模块; 所述控制模块, 用于向所述防干扰模块发送工作信号;
所述防干扰模块, 用于接收所述工作信号, 并根据所述工作信号, 控制第 一元件的工作状态,所述第一元件与所述控制模块通过至少一根第一连接线连 接, 所述至少一根第一连接线被防干扰材料至少分隔成两段, 所述防干扰材料 与地连接;
所述防干扰模块,还用于向所述控制模块发送回流信号, 所述回流信号通 过所述防干扰材料流向所述所述控制模块。
2、 如权利要求 1所述的防干扰装置, 其特征在于, 还包括: 连接所述防 干扰模块和所述控制模块的连接器;
所述连接器, 用于接收所述工作信号, 并将所述工作信号发送给所述防干 扰模块。
3、 如权利要求 1或 2所述的防干扰装置, 其特征在于, 所述防干扰材料 为屏蔽干扰材料, 所述至少一根第一连接线被所述防干扰材料包裹, 所述防干 扰材料的长度小于所述至少一根第一连接线的长度。
4、 如权利要求 3所述的防干扰装置, 其特征在于, 所述屏蔽干扰材料包 括以下至少一种材料: 铜箔、 铝箔、 银箔、 导电布或屏蔽涂层。
5、 如权利要求 1或 2所述的防干扰装置, 其特征在于, 所述防干扰材料 粘贴在所述至少一根第一连接线的设定位置上。
6、 如权利要求 5所述的防干扰装置, 其特征在于, 所述防干扰材料为导 电双面股。
7、 一种防干扰方法, 其特征在于, 包括:
接收控制装置发送的工作信号;
根据所述工作信号控制第一元件的工作状态, 其中, 所述第一元件与所述 控制装置通过至少一根第一连接线连接,所述至少一根第一连接线被防干扰材 料至少分隔成两段, 所述防干扰材料与地连接;
向所述控制装置发送回流信号,所述回流信号通过所述防干扰材料流向所 述控制装置。
8、 如权利要求 7所述的防干扰方法, 其特征在于, 所述接收控制装置发 送的工作信号, 具体为:
接收所述控制装置通过连接器发送的工作信号。
9、 如权利要求 7或 8所述的防干扰方法, 其特征在于, 所述防干扰材料 为屏蔽干扰材料,所述至少一根第一连接线被所述防干扰材料包裹, 所述防干 扰材料的长度小于所述至少一根第一连接线的长度。
10、 如权利要求 9所述的防干扰方法, 其特征在于, 所述屏蔽干扰材料包 括以下至少一种材料: 铜箔、 铝箔、 银箔、 导电布或屏蔽涂层。
11、 如权利要求 7或 8所述的防干扰方法, 其特征在于, 所述防干扰材料 粘贴在所述至少一根第一连接线的设定位置上。
12、 如权利要求 11所述的防干扰方法, 其特征在于, 所述防干扰材料为 导电双面胶。
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JP6085373B2 (ja) 2017-02-22
JP2016506084A (ja) 2016-02-25
CN104170539A (zh) 2014-11-26
US20150162115A1 (en) 2015-06-11
US9324480B2 (en) 2016-04-26
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EP2897121B1 (en) 2017-10-18
EP2897121A1 (en) 2015-07-22
CN104170539B (zh) 2017-03-15

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