CN114980712B - Method and device for reducing electromagnetic radiation - Google Patents
Method and device for reducing electromagnetic radiation Download PDFInfo
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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Abstract
The application discloses a method and a device for reducing electromagnetic radiation, and relates to the technical field of electromagnetic compatibility. The method comprises the following steps: acquiring the electric field intensity born by the liquid leakage detection line; determining the type of the electromagnetic radiation source according to the electric field intensity and a specified threshold value; when the CPU is an electromagnetic radiation source, a double-strip leakage detection mechanism or a conductive cloth wrapping leakage detection line is adopted for shielding treatment; the double liquid leakage detection mechanism is characterized in that a first liquid leakage detection line is arranged inside the case, and a second liquid leakage detection line is arranged outside the case and used for detecting liquid leakage conditions inside and outside the case. Due to the variety of electromagnetic radiation sources, the manner in which electromagnetic radiation is reduced is different. When the CPU is an electromagnetic radiation source, the shielding treatment is carried out by determining to adopt a double-strip leakage detection mechanism or adopting conductive cloth to wrap the leakage detection line, and the treatment method can realize the reduction of the electromagnetic radiation source so as to avoid the influence on the data transmission between information technology equipment.
Description
Technical Field
The present disclosure relates to the field of electromagnetic compatibility technologies, and in particular, to a method and an apparatus for reducing electromagnetic radiation.
Background
Along with the gradual development of information technology equipment (such as server products and computer products) to high speed, high sensitivity, high integration and high stability, the requirements on electromagnetic compatibility are also more and more severe. Accordingly, the problem of electromagnetic radiation applied to the interconnection means of information technology-like devices is increasingly emphasized. Electromagnetic radiation not only affects the operation of the information technology-like device, but also interferes with other devices surrounding the information technology-like device. Electromagnetic compatibility issues are an important consideration in the early stages of design.
In the conventional information technology equipment, when a liquid cooling system is used for heat radiation of a heat generating component, in order to detect leakage of a refrigerant (refrigerant liquid), a liquid leakage detection line is wound around a liquid cooling plate of a central processing unit (Central Processing Unit, CPU) and a return passage of the refrigerant liquid of a liquid cooling pipe. When the refrigerating fluid leaks, the leakage detection line can detect and feed back a leakage signal to the BMC. The CPU has very strong electromagnetic noise in the working process, so that the CPU becomes an electromagnetic radiation source. And the liquid leakage detection line arranged on the liquid cooling plate and the liquid cooling pipe can be coupled with electromagnetic noise of the CPU, and at the moment, the liquid leakage detection line can become a radiation antenna to radiate outwards. Such electromagnetic radiation can have an impact on data transmission between information technology-like devices.
In view of the above-mentioned problems, it is a matter that the person skilled in the art strives to solve to find how to reduce electromagnetic radiation.
Disclosure of Invention
The application aims to provide a method and a device for reducing electromagnetic radiation, which are used for reducing electromagnetic radiation generated outside when a liquid leakage detection line becomes a radiation antenna.
To solve the above technical problems, the present application provides a method for reducing electromagnetic radiation, including:
acquiring the electric field intensity born by the liquid leakage detection line;
determining the type of the electromagnetic radiation source according to the electric field intensity and a specified threshold value;
when the CPU is an electromagnetic radiation source, a double-strip leakage detection mechanism or a conductive cloth wrapping leakage detection line is adopted for shielding treatment;
the double liquid leakage detection mechanisms are used for arranging a first liquid leakage detection line inside the case for detecting liquid leakage conditions inside the case, and arranging a second liquid leakage detection line outside the case for detecting liquid leakage conditions outside the case.
Preferably, determining the type of electromagnetic radiation source based on the electric field strength and the prescribed threshold comprises:
judging whether the electric field strength exceeds a specified threshold value;
if yes, adjusting the distance between the liquid leakage detection line and the CPU according to the preset distance; the preset distance is larger than the original distance between the liquid leakage detection line and the CPU;
judging whether the current electric field intensity born by the leakage detection line after being adjusted according to the preset distance exceeds a specified threshold value;
if yes, determining the electromagnetic radiation source as a CPU.
Preferably, the second leakage detection line is wrapped by conductive cloth for shielding treatment.
Preferably, the shielding treatment by wrapping the second leakage detection line with the conductive cloth includes:
and determining the thickness of the conductive cloth according to the absorption loss of the conductive cloth.
Preferably, the second liquid leakage detection line is wrapped by the conductive cloth in a spiral winding manner.
Preferably, the width of the conductive cloth is 10cm at maximum and 5cm at minimum.
Preferably, the width of the winding overlapping surface of the conductive cloth is 3mm at the maximum value, and the width of the winding overlapping surface is 2mm at the minimum value.
Preferably, the conductive cloth has a maximum thickness of 0.2mm and a minimum thickness of 0.15mm.
Preferably, the preset distance is 15cm.
To solve the above technical problem, the present application further provides an apparatus for reducing electromagnetic radiation, where the method for reducing electromagnetic radiation includes:
the acquisition module is used for acquiring the electric field intensity born by the liquid leakage detection line;
a first determining module for determining the type of the electromagnetic radiation source according to the electric field intensity and a prescribed threshold value;
and the second determining module is used for determining to adopt a double-strip leakage detection mechanism or adopt conductive cloth to wrap the leakage detection line for shielding treatment when the CPU is an electromagnetic radiation source.
A method of reducing electromagnetic radiation provided herein includes: acquiring the electric field intensity born by the liquid leakage detection line; determining the type of the electromagnetic radiation source according to the electric field intensity and a specified threshold value; when the CPU is an electromagnetic radiation source, a double-strip leakage detection mechanism or a conductive cloth wrapping leakage detection line is adopted for shielding treatment; the double liquid leakage detection mechanisms are used for arranging a first liquid leakage detection line inside the case for detecting liquid leakage conditions inside the case, and arranging a second liquid leakage detection line outside the case for detecting liquid leakage conditions outside the case. Due to the variety of electromagnetic radiation sources, the manner in which the electromagnetic radiation generated by them is reduced is also different. When the CPU is an electromagnetic radiation source, the shielding treatment is carried out by determining to adopt a double-strip leakage detection mechanism or adopting conductive cloth to wrap the leakage detection line, and the treatment method can realize the reduction of the electromagnetic radiation source so as to avoid the influence on the data transmission between information technology equipment.
The application also provides a device for reducing electromagnetic radiation, and the effect is the same as that above.
Drawings
For a clearer description of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a method for reducing electromagnetic radiation according to an embodiment of the present application;
FIG. 2 is a diagram illustrating a dual strip leak detection mechanism according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another dual strip leak detection mechanism according to an embodiment of the present disclosure;
fig. 4 is a block diagram of an apparatus for reducing electromagnetic radiation according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments herein without making any inventive effort are intended to fall within the scope of the present application.
The core of the application is to provide a method and a device for reducing electromagnetic radiation, which can reduce electromagnetic radiation generated outside when a liquid leakage detection line becomes a radiation antenna.
In order to provide a better understanding of the present application, those skilled in the art will now make further details of the present application with reference to the drawings and detailed description.
As information technology devices (such as server products and computer products) gradually develop in the directions of high speed, high sensitivity, high integration and high stability, the requirements on electromagnetic compatibility are also more and more severe. The clock frequency of the digital signal is higher and higher, the time for establishing and maintaining the signal is shorter and shorter, and the requirement for clock jitter is also severe. Therefore, for the interconnection device of the information technology devices with high speed, high sensitivity, high integration and high stability, the electromagnetic radiation problem is increasingly outstanding, so that the work of the information technology devices at the connecting end is influenced, and other surrounding devices are interfered. Therefore, electromagnetic compatibility issues must be considered in the early stages of information technology-like device design.
The heat dissipation mode of the traditional information technology equipment is air cooling, namely air is taken as a refrigerant, and the air is blown to flow by a fan arranged in the equipment, so that the heat exchange of the heating parts of the equipment is achieved, and the heat is taken away. If the operation amount of the equipment is increased, the heat generated by the heat radiating component is increased suddenly, and the fan of the equipment increases the rotating speed so as to drive the fluidity of the air to be increased. However, the fans with high rotation speeds of the equipment bring a lot of noise, and with the continuous appearance of large data centers, the number of equipment servers equipped in the main computer houses is increasing. When these servers are operating simultaneously, most of the noise approaches or exceeds 65dB, which is not in compliance with the current state regulations.
Because of the certain defects of the air cooling technology, the liquid cooling technology is gradually developed. The liquid cooling system is a technology for using liquid instead of air as a refrigerant to exchange heat for a heating component and take away heat. Liquid cooling is that a liquid cooling system is used for the equipment. At present, a cold plate type liquid cooling system is mostly adopted for a server in equipment. The cold plate type liquid cooling system adopts a cold plate assembly to be in contact with a high heat flux element, heat is led out through a cooling medium in the cold plate assembly, and then is subjected to heat exchange and transfer through one or more cooling loops, and finally, the heat of the equipment is emitted to the external environment or is recovered. The cold plate type liquid cooling mainly adopts a liquid cooling cold plate to dissipate heat in large power consumption parts such as CPU, DPU, BMC of a server, and other small quantity of heating devices still adopt an air cooling heat dissipation system.
The CPU is the core of the operation and control of the server, and is the final execution unit for information processing and program running. In the computer architecture, a CPU is a core hardware unit that performs control allocation and general-purpose operations on all hardware resources (such as a memory and an input/output unit) of a computer. The operation of all software layers in the computer will ultimately be mapped by the instruction set into the operation of the CPU. Therefore, electromagnetic radiation noise of the CPU is very strong. The CPU now becomes a strong radiation source. Since the cold plate is mainly placed above the CPU, the refrigerant liquid mainly circulates at the position of the cold plate, and in order to prevent leakage of the refrigerant liquid here, the leakage detection line is also arranged at the position of the cold plate. However, the arrangement mode can cause the leakage detection line to couple with electromagnetic noise of the CPU, and at the moment, the leakage detection line serves as a radiation tool and can become a radiation antenna to emit electromagnetic radiation outwards. Electromagnetic radiation is propagated in the air in the form of electromagnetic waves.
At present, as the liquid cooling system just enters a mass production stage, a liquid leakage detection line and a liquid cooling pipe are the most commonly used liquid leakage detection line and liquid cooling pipe in industrial production. When the leakage detection line is coupled with the electromagnetic noise of the CPU, the electromagnetic noise is in a frequency range of 100MHz-200MHz, the electric field intensity of the actual electromagnetic radiation exceeds 40dBuV/m, and the electric field intensity of the electromagnetic radiation exceeding the regulation electromagnetic radiation is 40dBuV/m.
The cause of electromagnetic radiation generally has two factors, namely, an electromagnetic radiation source and an electromagnetic radiation path. Electromagnetic radiation sources typically produce a sudden change in voltage or current. The CPU, as the main arithmetic unit in the server, processes a large amount of data, which can characterize the varying voltage signals and the rate of such voltage signals is extremely high, thus producing significant electromagnetic radiation interference. The length of the leakage detection line is generally more than two meters, so that the long unshielded leakage detection line serves as a good radiation tool, and the leakage detection line serves as a radiation antenna to generate electromagnetic radiation outwards and propagate in the air in the form of electromagnetic waves.
There are two corresponding measures for inhibiting electromagnetic radiation according to the cause of electromagnetic radiation, namely, removing an electromagnetic radiation source and inhibiting an electromagnetic radiation path. However, the CPU cannot be removed as a core component of the server. Therefore, the electromagnetic radiation path can be inhibited by adopting the mode that the leakage detection line is far away from the electromagnetic radiation source or the leakage detection line is added with a shielding layer.
Fig. 1 is a flowchart of a method for reducing electromagnetic radiation according to an embodiment of the present application. To solve the above technical problem, the present application provides a method for reducing electromagnetic radiation, as shown in fig. 1, the method includes:
s10: and acquiring the electric field intensity born by the liquid leakage detection line.
When the leakage detection line becomes a radiation tool and the effect of the radiation antenna is reflected, the generated electromagnetic radiation is reflected by the electric field intensity. Therefore, it is necessary to acquire the electric field intensity of the leak detection line. The electric field strength is expressed in dBuV/m.
S11: the type of electromagnetic radiation source is determined based on the electric field strength and a prescribed threshold.
And judging whether the electric field strength exceeds a specified threshold. If the electric field strength exceeds a specified threshold, the electromagnetic radiation of the equipment is out of standard, and the electromagnetic radiation needs to be reduced; if the electric field strength does not exceed the specified threshold, the electromagnetic radiation of the equipment is not out of standard, and the electromagnetic radiation does not need to be reduced.
S12: when the CPU is an electromagnetic radiation source, the shielding treatment is carried out by adopting a double-strip leakage detection mechanism or adopting a conductive cloth to wrap a leakage detection line.
Fig. 2 is a schematic diagram of a dual strip leak detection mechanism according to an embodiment of the present disclosure. As shown in fig. 2, the dual-liquid leakage detection mechanism is to set a first liquid leakage detection line inside the case for detecting the liquid leakage condition inside the case, and set a second liquid leakage detection line outside the case for detecting the liquid leakage condition outside the case. Taking two paths of CPUs as an example, one end of a liquid leakage detection line is connected with a liquid leakage detection connector, and the liquid leakage detection connector is arranged on the two CPUs along a liquid cooling pipe and extends out of the server case until reaching a liquid cooling controller.
On the basis of the above embodiments, as a preferred embodiment, determining the type of the electromagnetic radiation source based on the electric field strength and the prescribed threshold value includes:
judging whether the electric field strength exceeds a specified threshold value;
if yes, adjusting the distance between the liquid leakage detection line and the CPU according to the preset distance; the preset distance is larger than the original distance between the liquid leakage detection line and the CPU; if the electric field strength is judged not to exceed the specified threshold value, the electromagnetic radiation generated at the moment accords with the requirement, and no treatment can be carried out.
Judging whether the current electric field intensity born by the leakage detection line after being adjusted according to the preset distance exceeds a specified threshold value;
if yes, determining the electromagnetic radiation source as a CPU; and when judging that the current electric field intensity born by the leakage detection line after the adjustment according to the preset distance does not exceed the specified threshold value, indicating that the electromagnetic radiation source is not a CPU.
Fig. 3 is a schematic diagram of another dual strip leak detection mechanism according to an embodiment of the present disclosure. As shown in fig. 3, in this embodiment, the preset distance is set to 15cm, and it should be noted that, the 15cm is only one of many embodiments, and the preset distance may be determined according to a specific implementation scenario. When the electromagnetic radiation source is a CPU, a double liquid leakage detection mechanism is adopted, a first liquid leakage detection line is arranged inside the case and used for detecting the liquid leakage condition inside the case, and a second liquid leakage detection line is arranged outside the case and used for detecting the liquid leakage condition outside the case. At this time, even if the first leakage detection line is coupled with electromagnetic radiation of the CPU, because the first line is built in the server chassis, electromagnetic radiation generated by the first leakage detection line cannot radiate outside the server chassis due to electromagnetic shielding effect of the server chassis, and thus an electromagnetic radiation exceeding condition is not caused.
When the electromagnetic radiation source is not a CPU, the conductive cloth can be used for wrapping the leakage detection line for shielding treatment, and particularly, the second leakage detection line is shielded. Wherein, adopt conductive cloth parcel second weeping detection line to carry out shielding treatment includes: and determining the thickness of the conductive cloth according to the absorption loss of the conductive cloth.
The wrapping conductive cloth needs to be double-sided conductive cloth, the wrapping mode can be a spiral wrapping mode of conductive cloth with the width of 5-10cm, and the width of the wrapping overlapping surface is 2-3mm. The whole package of the exposed cable can also be adopted, and the width of the overlapping surface of the package is 2-3mm. The thickness of the conductive cloth needs to take into account the absorption loss of the conductive cloth. When electromagnetic wave formsThe amplitude of electromagnetic waves decreases exponentially as the electromagnetic radiation of the formula passes through the shielding conductive cloth. The main reasons for the attenuation are ohmic losses and heating of the material due to the induced currents in the conductive cloth. Wherein, the formula of absorption loss is:. Where t is the thickness of the conductive cloth, the thickness unit is in (1 inch equals 2.54 cm), u is magnetic permeability, δ is electrical conductivity, and f is the frequency of the electromagnetic wave. It should be noted that the electromagnetic waves of the electromagnetic radiation mentioned in this application are between 30MHz and 220 MHz. When the electromagnetic wave is between 30MHz and 220MHz, the maximum thickness of the conductive cloth is 0.2mm and the minimum thickness of the conductive cloth is 0.15mm according to the formula. At this time, the absorption loss is more than 30dB, and the electromagnetic radiation shielding effect is good.
Electromagnetic radiation test results caused by the coupling of the leakage detection line to the electromagnetic noise of the CPU or the electromagnetic noise of other electromagnetic radiation sources inside the chassis exceed the regulation limit requirements. The bad result that the product cannot be marketed due to the fact that the electromagnetic radiation test result exceeds the standard is avoided by adopting a double-strip leakage detection mechanism or adopting conductive cloth to wrap the leakage detection line for shielding treatment; meanwhile, the radiation source can be rapidly positioned, the time for solving the problem is saved, and the testing cost is saved. Due to the variety of electromagnetic radiation sources, the manner in which electromagnetic radiation is reduced is different. When the CPU is an electromagnetic radiation source, the shielding treatment is carried out by determining to adopt a double-strip leakage detection mechanism or adopting conductive cloth to wrap the leakage detection line, and the treatment method can realize the reduction of the electromagnetic radiation source so as to avoid the influence on the data transmission between information technology equipment.
In the foregoing embodiments, the method for reducing electromagnetic radiation is described in detail, and the present application also provides corresponding embodiments of an apparatus for reducing electromagnetic radiation.
Fig. 4 is a block diagram of an apparatus for reducing electromagnetic radiation according to an embodiment of the present application. As shown in fig. 4, the present application further provides an apparatus for reducing electromagnetic radiation, where the method for reducing electromagnetic radiation includes:
an acquisition module 40, configured to acquire an electric field intensity borne by the leakage detection line;
a first determining module 41 for determining the type of electromagnetic radiation source based on the electric field strength and a prescribed threshold;
and the second determining module 42 is configured to determine, when the CPU is an electromagnetic radiation source, to perform shielding treatment by using a dual-strip leakage detection mechanism or wrapping a leakage detection line with conductive cloth.
Due to the variety of electromagnetic radiation sources, the manner in which electromagnetic radiation is reduced is different. When the CPU is an electromagnetic radiation source, the shielding treatment is carried out by determining to adopt a double-strip leakage detection mechanism or adopting conductive cloth to wrap the leakage detection line, and the treatment method can realize the reduction of the electromagnetic radiation source so as to avoid the influence on the data transmission between information technology equipment.
Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
The present application also provides an apparatus applied to a CPU including:
a memory for storing a computer program;
a processor for carrying out the steps of a method of reducing electromagnetic radiation as mentioned in the above embodiments when executing a computer program.
The device applied to the CPU provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
The processor may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor may be implemented in hardware in at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor may also include a main processor, which is a processor for processing data in an awake state, also called a central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor may be integrated with an image processor (Graphics Processing Unit, GPU) for use in responsible for rendering and rendering of content to be displayed by the display screen. In some embodiments, the processor may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.
The memory may include one or more computer-readable storage media, which may be non-transitory. The memory may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory is at least configured to store a computer program that, when loaded and executed by the processor, performs the relevant steps of a method for reducing electromagnetic radiation as disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory can also comprise an operating system, data and the like, and the storage mode can be short-term storage or permanent storage. The operating system may include Windows, unix, linux, among others. The data may include, but is not limited to, application to a method of reducing electromagnetic radiation.
In some embodiments, the device applied to the CPU may further comprise a display screen, an input-output interface, a communication interface, a power supply and a communication bus.
It will be appreciated by those skilled in the art that the structures mentioned in the above embodiments do not constitute limitations on the devices applied to the CPU, and may include more or fewer components than those mentioned in the above embodiments.
The device applied to the CPU comprises a memory and a processor, wherein the processor can realize a method for reducing electromagnetic radiation when executing a program stored in the memory.
Finally, the present application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps as described in the method embodiments above.
It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. With such understanding, the technical solution of the present application, or a part contributing to the prior art or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random-access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is provided for a method and apparatus for reducing electromagnetic radiation. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A method of reducing electromagnetic radiation, comprising:
acquiring the electric field intensity born by the liquid leakage detection line;
determining the type of the electromagnetic radiation source according to the electric field intensity and a specified threshold value;
when the CPU is the electromagnetic radiation source, a double liquid leakage detection mechanism is adopted or a conductive cloth is adopted to wrap the liquid leakage detection line for shielding treatment;
the double liquid leakage detection mechanisms are used for arranging a first liquid leakage detection line inside a case and used for detecting liquid leakage conditions inside the case, and arranging a second liquid leakage detection line outside the case and used for detecting liquid leakage conditions outside the case.
2. The method of reducing electromagnetic radiation according to claim 1, wherein said determining the type of electromagnetic radiation source based on said electric field strength and a prescribed threshold value comprises:
judging whether the electric field strength exceeds the specified threshold value;
if yes, adjusting the distance between the liquid leakage detection line and the CPU according to a preset distance; the preset distance is larger than the original distance between the liquid leakage detection line and the CPU;
judging whether the current electric field intensity born by the liquid leakage detection line after being adjusted according to the preset distance exceeds the specified threshold value;
if yes, determining the electromagnetic radiation source as the CPU.
3. The method of reducing electromagnetic radiation according to claim 1, wherein a second of said leakage detection lines is shielded by wrapping it with a conductive cloth.
4. The method of reducing electromagnetic radiation according to claim 3, wherein said shielding with a conductive cloth wrapping a second of said leakage detection lines comprises:
and determining the thickness of the conductive cloth according to the absorption loss of the conductive cloth.
5. A method of reducing electromagnetic radiation according to claim 3, wherein the conductive cloth is wrapped around the second of the leakage detection lines in a spiral wrapping.
6. The method of reducing electromagnetic radiation according to claim 4, wherein the conductive cloth has a maximum width of 10cm and a minimum width of 5cm.
7. The method of reducing electromagnetic radiation according to claim 4, wherein the conductive cloth has a maximum wrap overlap width of 3mm and a minimum wrap overlap width of 2mm.
8. The method of reducing electromagnetic radiation according to claim 4, wherein the conductive cloth has a thickness maximum of 0.2mm and a thickness minimum of 0.15mm.
9. The method of reducing electromagnetic radiation according to claim 2, wherein the predetermined distance is 15cm.
10. An apparatus for reducing electromagnetic radiation as defined in any one of claims 1 to 9, comprising:
the acquisition module is used for acquiring the electric field intensity born by the liquid leakage detection line;
a first determining module for determining the type of the electromagnetic radiation source according to the electric field intensity and a specified threshold;
and the second determining module is used for determining to adopt a double-strip liquid leakage detection mechanism or adopt conductive cloth to wrap the liquid leakage detection line for shielding treatment when the CPU is the electromagnetic radiation source.
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| CN202210446392.9A CN114980712B (en) | 2022-04-26 | 2022-04-26 | Method and device for reducing electromagnetic radiation |
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| CN202210446392.9A CN114980712B (en) | 2022-04-26 | 2022-04-26 | Method and device for reducing electromagnetic radiation |
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| CN109371668A (en) * | 2018-09-25 | 2019-02-22 | 广州巨枫科技有限公司 | A kind of electromagnetic shielding anti-radiation electric conduction cloth |
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| CN112793251A (en) * | 2020-12-31 | 2021-05-14 | 苏州巨奇光电科技有限公司 | Multifunctional conductive cloth |
| WO2022062987A1 (en) * | 2020-09-28 | 2022-03-31 | 中车长春轨道客车股份有限公司 | Electromagnetic environment evaluation method and device, and server |
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| CN2514392Y (en) * | 2001-10-22 | 2002-10-02 | 联想(北京)有限公司 | Electromagnetic shield for computer casing |
| CN102386937A (en) * | 2011-10-25 | 2012-03-21 | 青岛海信移动通信技术股份有限公司 | Wireless communication system and method for improving sensitivity of wireless communication system |
| CN109371668A (en) * | 2018-09-25 | 2019-02-22 | 广州巨枫科技有限公司 | A kind of electromagnetic shielding anti-radiation electric conduction cloth |
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| CN114980712A (en) | 2022-08-30 |
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