Pub Date : 2021-03-15DOI: 10.11884/HPLPB202133.200322
Dong Pan, Liu Erxiang, Li Jie, Jiang Xiaoguo, Wang Tao, Shi Jinshui, Long Jidong
Vacuum arc discharges with deuteride cathode have many applications, such as nondestructive examination, oil logging, and neutron activation analysis. Deuteride cathode releases many gases during discharge, which is quite different from metal cathode. The discharges display some unique characteristics. A maguifying lens and an ICCD camera are used to observe the luminous spots of vacuum arc discharge. The space resolution of this system is about 5 μm, and the time resolution is about 2 ns. The arc current has a full width at half maximum (FWHM) of about 0.9 μs, and its waveform is half cycle sinusoidal. The results show that the luminous spots merge together into a big one in most cases. Sometimes there are two or more luminous spots due to droplets. The area of the luminous spot grows as arc current increases. The cathode spots’ merging is helpful to increase plasma density and improve discharge efficiency.
{"title":"Luminous spot distribution of vacuum arc discharge with deuteride cathode","authors":"Dong Pan, Liu Erxiang, Li Jie, Jiang Xiaoguo, Wang Tao, Shi Jinshui, Long Jidong","doi":"10.11884/HPLPB202133.200322","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200322","url":null,"abstract":"Vacuum arc discharges with deuteride cathode have many applications, such as nondestructive examination, oil logging, and neutron activation analysis. Deuteride cathode releases many gases during discharge, which is quite different from metal cathode. The discharges display some unique characteristics. A maguifying lens and an ICCD camera are used to observe the luminous spots of vacuum arc discharge. The space resolution of this system is about 5 μm, and the time resolution is about 2 ns. The arc current has a full width at half maximum (FWHM) of about 0.9 μs, and its waveform is half cycle sinusoidal. The results show that the luminous spots merge together into a big one in most cases. Sometimes there are two or more luminous spots due to droplets. The area of the luminous spot grows as arc current increases. The cathode spots’ merging is helpful to increase plasma density and improve discharge efficiency.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"0340-1-0340-5"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43624579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-15DOI: 10.11884/HPLPB202133.200320
Lin Mao, Xu Haojun, Wei Xiaolong, Han Xinmin, Chang Yipeng, Lin Min
The application of Inductively Coupled Plasma (ICP) can cause a wide range high density plasma and has great advantages in electromagnetic wave attenuation. Studying the process of interaction between ICP and electromagnetic wave, we established the electromagnetic wave propagation in inhomogeneous plasma, adopted hierarchical model for the diagnosis of the interaction of plasma and electromagnetic wave, and studied the electromagnetic wave attenuation under different conditions of input power. The experiment method of inductively coupled plasma for attenuation electromagnetic wave was proposed. Based on the model of plasma covering over the metal plate, the arch system for measurement of microwave reflectivity of plasma was established. The interaction of closed-plasma and electromagnetic wave with a bandwidth of 4−8 GHz was studied, the effect on microwave reflection of different rf power was evaluated analyzed, and the experimental measurement and calculation results were analyzed. The experimental results show that the inductively coupled plasma attenuates the electromagnetic wave in 5.92−6.8 GHz band obviously by power regulation.
{"title":"Attenuation characteristics of electromagnetic wave in inductive coupled plasma based on variation of discharge power","authors":"Lin Mao, Xu Haojun, Wei Xiaolong, Han Xinmin, Chang Yipeng, Lin Min","doi":"10.11884/HPLPB202133.200320","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200320","url":null,"abstract":"The application of Inductively Coupled Plasma (ICP) can cause a wide range high density plasma and has great advantages in electromagnetic wave attenuation. Studying the process of interaction between ICP and electromagnetic wave, we established the electromagnetic wave propagation in inhomogeneous plasma, adopted hierarchical model for the diagnosis of the interaction of plasma and electromagnetic wave, and studied the electromagnetic wave attenuation under different conditions of input power. The experiment method of inductively coupled plasma for attenuation electromagnetic wave was proposed. Based on the model of plasma covering over the metal plate, the arch system for measurement of microwave reflectivity of plasma was established. The interaction of closed-plasma and electromagnetic wave with a bandwidth of 4−8 GHz was studied, the effect on microwave reflection of different rf power was evaluated analyzed, and the experimental measurement and calculation results were analyzed. The experimental results show that the inductively coupled plasma attenuates the electromagnetic wave in 5.92−6.8 GHz band obviously by power regulation.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"3050-1-3050-8"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43230493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-05DOI: 10.11884/HPLPB202133.200318
Liu Ruichun, Zhang Qinglei, Mi Qingru, Jiang Bo-Cheng, W. Kun, Liu Changliang, Zhao Zhen-Tang
Synchrotron light source is one of the most powerful tools in modern science and technology. Shanghai Synchrotron Radiation Facility (SSRF), located in Shanghai, China, is an advanced 3.5 GeV 3rd-generation medium energy light source. The 3rd-generation synchrotron radiation light source will provide high brilliance and high stability synchrotron radiation to fulfill the advanced experimental conditions in frontier researches. To achieve highly stable radiation, it is important to have highly stable beam orbit. Thus we adopted machine learning method to control and feedback the orbit. Using this neural network-based orbit correction method, which doesn’t rely on the response matrix, we can establish a nonlinear mapping relationship between correctors and the orbit distortions and perform continuous online retraining. This new method can significantly improve the orbit stability of SSRF.
{"title":"Application of machine learning in orbital correction of storage ring","authors":"Liu Ruichun, Zhang Qinglei, Mi Qingru, Jiang Bo-Cheng, W. Kun, Liu Changliang, Zhao Zhen-Tang","doi":"10.11884/HPLPB202133.200318","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200318","url":null,"abstract":"Synchrotron light source is one of the most powerful tools in modern science and technology. Shanghai Synchrotron Radiation Facility (SSRF), located in Shanghai, China, is an advanced 3.5 GeV 3rd-generation medium energy light source. The 3rd-generation synchrotron radiation light source will provide high brilliance and high stability synchrotron radiation to fulfill the advanced experimental conditions in frontier researches. To achieve highly stable radiation, it is important to have highly stable beam orbit. Thus we adopted machine learning method to control and feedback the orbit. Using this neural network-based orbit correction method, which doesn’t rely on the response matrix, we can establish a nonlinear mapping relationship between correctors and the orbit distortions and perform continuous online retraining. This new method can significantly improve the orbit stability of SSRF.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"034007-1-034007-9"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45569504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-05DOI: 10.11884/HPLPB202133.200292
Chen Qiang, Pan Lin, Huang Yang
This paper presents a 5.8 GHz high-efficiency dual-polarized rectenna for microwave wireless power transmission. The rectenna consists of a 5.8 GHz dual-polarized receiving antenna and a 5.8 GHz class-F rectifier. A metallic probe is used to integrate the receiving antenna and the rectifier. The receiving antenna is a 2×2 microstrip array antenna and the metal ring loading technology is adopted to improve the rectenna’s impedance bandwidth and robustness. The metal probe instead of the conventional microwave connector and cable is utilized to realize the integration of receiving antenna and rectifier circuit, thus simplifying the structure and reducing the weight, loss and cost of the rectifier antenna. A prototype of the dual-polarized rectenna is fabricated and its rectifying efficiency is measured and compared with the linear-polarized rectenna with the same aperture area. The measured results show that the maximum conversion efficiency of the dual-polarized rectifying antenna reaches 76.8% under the optimum incident power density of 1.47 mW·cm−2. Compared to the linear-polarized rectenna, when the polarization direction of the incident wave varies from 0° to 90°, the conversion efficiency of the rectenna antenna is always above 62% with stable DC output and the rectenna antenna exhibits excellent all-polarization receiving rectification performance.
{"title":"Design of high-performance dual-polarized rectenna for microwave wireless power transmission","authors":"Chen Qiang, Pan Lin, Huang Yang","doi":"10.11884/HPLPB202133.200292","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200292","url":null,"abstract":"This paper presents a 5.8 GHz high-efficiency dual-polarized rectenna for microwave wireless power transmission. The rectenna consists of a 5.8 GHz dual-polarized receiving antenna and a 5.8 GHz class-F rectifier. A metallic probe is used to integrate the receiving antenna and the rectifier. The receiving antenna is a 2×2 microstrip array antenna and the metal ring loading technology is adopted to improve the rectenna’s impedance bandwidth and robustness. The metal probe instead of the conventional microwave connector and cable is utilized to realize the integration of receiving antenna and rectifier circuit, thus simplifying the structure and reducing the weight, loss and cost of the rectifier antenna. A prototype of the dual-polarized rectenna is fabricated and its rectifying efficiency is measured and compared with the linear-polarized rectenna with the same aperture area. The measured results show that the maximum conversion efficiency of the dual-polarized rectifying antenna reaches 76.8% under the optimum incident power density of 1.47 mW·cm−2. Compared to the linear-polarized rectenna, when the polarization direction of the incident wave varies from 0° to 90°, the conversion efficiency of the rectenna antenna is always above 62% with stable DC output and the rectenna antenna exhibits excellent all-polarization receiving rectification performance.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"033003-1-033003-7"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41661203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-05DOI: 10.11884/HPLPB202133.200275
Zhou Xiaokai, T. Lili
The research on the diffusion behavior of tritium in zirconium alloy is a crucial problem for nuclear power plant radiation safety evaluation. Based on the basic model of tritium diffusion, a one-dimensional simulation program for the behavior of tritium diffusion was established in this work. The simulation program was verified by typical experiments, and the simulation results were in good agreement with the experimental results. The effects of different concentration and temperature distribution of tritium on the diffusion behavior of tritium in zirconium alloy cladding materials were analyzed. The results show that the increase of tritium concentration in P-C gap lead to the increase of tritium diffusion flux and permeability flux in and out of cladding. Due to the relatively low diffusion coefficient of the coated oxide layer, the existence of the coated oxide layer limits the tritium permeability greatly. The effect of temperature on the diffusion rate of tritium is exponential. The higher the temperature is, the faster the diffusion rate is. The relative low temperature of the oxide layer on the outer surface of zirconium alloy limits the rate of tritium permeation out of the cladding tube. Thermally induced diffusion due to temperature gradient is beneficial to limit the permeation flux of tritium diffusing out of the zirconium cladding.
{"title":"Numerical simulation and experimental verification on the diffusion behavior of tritium in zirconium alloy cladding materials","authors":"Zhou Xiaokai, T. Lili","doi":"10.11884/HPLPB202133.200275","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200275","url":null,"abstract":"The research on the diffusion behavior of tritium in zirconium alloy is a crucial problem for nuclear power plant radiation safety evaluation. Based on the basic model of tritium diffusion, a one-dimensional simulation program for the behavior of tritium diffusion was established in this work. The simulation program was verified by typical experiments, and the simulation results were in good agreement with the experimental results. The effects of different concentration and temperature distribution of tritium on the diffusion behavior of tritium in zirconium alloy cladding materials were analyzed. The results show that the increase of tritium concentration in P-C gap lead to the increase of tritium diffusion flux and permeability flux in and out of cladding. Due to the relatively low diffusion coefficient of the coated oxide layer, the existence of the coated oxide layer limits the tritium permeability greatly. The effect of temperature on the diffusion rate of tritium is exponential. The higher the temperature is, the faster the diffusion rate is. The relative low temperature of the oxide layer on the outer surface of zirconium alloy limits the rate of tritium permeation out of the cladding tube. Thermally induced diffusion due to temperature gradient is beneficial to limit the permeation flux of tritium diffusing out of the zirconium cladding.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"036001-1-036001-6"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47699591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-05DOI: 10.11884/HPLPB202133.200334
Zhumei Lin, Feng Guo-ying, Zhou Hao, Luo Yun, W. Jianjun
This paper presents the ammonia gas sensor of optical fiber dislocation type based on single-walled carbon nanotubes (SWCNTs)-polymer self-assembled composite film. Alone with high-Q resonator, the film has a large number of free carboxyl groups and a large specific surface area, which provides strong interaction between light and the film, as well as high adsorption and selectivity to ammonia. The spectrum from the sensor varies with the effective refractive index affected by the ammonia concentration. In the low concentration range of (10−37)×10−6, the ratio of the spectral change to the ammonia concentration difference (i.e. the sensitivity) is of 13.25 pm/10−6, a detection limit is 3.77×10−6 with good linearity. This work provides an effective method for developing low-concentration and high-selectivity ammonia sensors.
{"title":"Optical fiber dislocation ammonia gas sensor based on self-assembled film","authors":"Zhumei Lin, Feng Guo-ying, Zhou Hao, Luo Yun, W. Jianjun","doi":"10.11884/HPLPB202133.200334","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200334","url":null,"abstract":"This paper presents the ammonia gas sensor of optical fiber dislocation type based on single-walled carbon nanotubes (SWCNTs)-polymer self-assembled composite film. Alone with high-Q resonator, the film has a large number of free carboxyl groups and a large specific surface area, which provides strong interaction between light and the film, as well as high adsorption and selectivity to ammonia. The spectrum from the sensor varies with the effective refractive index affected by the ammonia concentration. In the low concentration range of (10−37)×10−6, the ratio of the spectral change to the ammonia concentration difference (i.e. the sensitivity) is of 13.25 pm/10−6, a detection limit is 3.77×10−6 with good linearity. This work provides an effective method for developing low-concentration and high-selectivity ammonia sensors.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"039002-1-039002-7"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45007722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-05DOI: 10.11884/HPLPB202133.200291
Fu Yufan, Zhou Dong-fang, Z. Yi, Lu Dalong, Z. De-wei, Xuwei Fei
In this paper, a compact broadband Rotman lens beamforming network based on equal optical path difference is proposed. The beamforming network is intended for applications in a multi-beam antenna array of 5G millimeter-wave (mm-wave) communication. Firstly, the theoretical design of the Rotman lens is introduced in detail. A power divider is used to replace the standard single-port feeding mode to generate a high-directional beam, reducing the scattering of the lens’ internal energy and the energy loss at adjacent ports. The Chebyshev multi-stub matching converter is used to optimize the original tapered array output port. To ensure a wide frequency band, the original matching port size is reduced, and the overall size of the lens is reduced by 20%. Measurement results of the improved model, show that the working frequency band of the lens is 16.5−33.8 GHz, of which S11 is better than 15 dB at 17.2−32.0 GHz, and the scanning angle is ±30°. The lens has a simple and compact structure, can effectively provide a stable phase difference signal for adjacent array elements, and achieve the goal of 5G millimeter-wave array multi-beam.
{"title":"Design of compact wideband Rotman lens for 5G multibeam application","authors":"Fu Yufan, Zhou Dong-fang, Z. Yi, Lu Dalong, Z. De-wei, Xuwei Fei","doi":"10.11884/HPLPB202133.200291","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200291","url":null,"abstract":"In this paper, a compact broadband Rotman lens beamforming network based on equal optical path difference is proposed. The beamforming network is intended for applications in a multi-beam antenna array of 5G millimeter-wave (mm-wave) communication. Firstly, the theoretical design of the Rotman lens is introduced in detail. A power divider is used to replace the standard single-port feeding mode to generate a high-directional beam, reducing the scattering of the lens’ internal energy and the energy loss at adjacent ports. The Chebyshev multi-stub matching converter is used to optimize the original tapered array output port. To ensure a wide frequency band, the original matching port size is reduced, and the overall size of the lens is reduced by 20%. Measurement results of the improved model, show that the working frequency band of the lens is 16.5−33.8 GHz, of which S11 is better than 15 dB at 17.2−32.0 GHz, and the scanning angle is ±30°. The lens has a simple and compact structure, can effectively provide a stable phase difference signal for adjacent array elements, and achieve the goal of 5G millimeter-wave array multi-beam.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"033006-1-033006-6"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45293210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-05DOI: 10.11884/HPLPB202133.200201
Liang Chunhua, W. Zihao, Zhou Ningchuang, Dong Lan, W. Xiaolong, Qu Huamin
As the installation foundation of magnet support, the plinth is critical for the stability of the whole support unit. Different fabrication and installation processes of plinths make significant differences in performance of the support unit. Based on the stringent requirements of advanced synchrotron light source for the mechanical stability of magnets, the plinth installation pouring experiment was carried out. Several concrete construction techniques commonly applied in practice were tested with the plinths of uniform shape and size. The natural frequency of each plinth was measured by hammering method and its stability was evaluated. It is concluded from the test result that secondary grouting can effectively improve the stability of the plinth and the plinth of epoxy-based grouting shows better performance in stability than that of cement-based grouting. Based on the natural frequency test result, the influence of the plinth installation on the system mode is analyzed with the support system of High Energy Photon Source as an example. The experimental results have certain reference value for the plinth design of similar machines.
{"title":"Experimental study on magnet support plinths of advanced light source","authors":"Liang Chunhua, W. Zihao, Zhou Ningchuang, Dong Lan, W. Xiaolong, Qu Huamin","doi":"10.11884/HPLPB202133.200201","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200201","url":null,"abstract":"As the installation foundation of magnet support, the plinth is critical for the stability of the whole support unit. Different fabrication and installation processes of plinths make significant differences in performance of the support unit. Based on the stringent requirements of advanced synchrotron light source for the mechanical stability of magnets, the plinth installation pouring experiment was carried out. Several concrete construction techniques commonly applied in practice were tested with the plinths of uniform shape and size. The natural frequency of each plinth was measured by hammering method and its stability was evaluated. It is concluded from the test result that secondary grouting can effectively improve the stability of the plinth and the plinth of epoxy-based grouting shows better performance in stability than that of cement-based grouting. Based on the natural frequency test result, the influence of the plinth installation on the system mode is analyzed with the support system of High Energy Photon Source as an example. The experimental results have certain reference value for the plinth design of similar machines.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"034003-1-034003-6"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48967465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To solve the problem that the data link of the unmanned aerial vehicle (UAV) is vulnerable to electromagnetic interference during the flight and cause the link interruption, we took a certain data link of UAV as our research object, and proposed an experimental method of injection effect based on front door coupling. On this basis, we developed the effect experiment for the data link of UAV. We derived the sensitivity threshold curve of the data link and determined the sensitivity threshold, analyzed the work principle of RF front end circuit of the data link and the signal transmission process of the receiver under the effect of electromagnetic interference, revealed the mechanism of combined frequency interference and out of band saturation interference on data link, and finally carried out the experimental verification. Based on the test results, we put forward the corresponding protective methods from the aspects of the circuits level and adaptive control respectively.
{"title":"Mechanism and protection on the data link of UAV exposed to electromagnetic interference","authors":"Zhao Min, Xu Tong, Cheng Erwei, Zhou Xing, Sun Liang, Chen Yazhou","doi":"10.11884/HPLPB202133.200263","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200263","url":null,"abstract":"To solve the problem that the data link of the unmanned aerial vehicle (UAV) is vulnerable to electromagnetic interference during the flight and cause the link interruption, we took a certain data link of UAV as our research object, and proposed an experimental method of injection effect based on front door coupling. On this basis, we developed the effect experiment for the data link of UAV. We derived the sensitivity threshold curve of the data link and determined the sensitivity threshold, analyzed the work principle of RF front end circuit of the data link and the signal transmission process of the receiver under the effect of electromagnetic interference, revealed the mechanism of combined frequency interference and out of band saturation interference on data link, and finally carried out the experimental verification. Based on the test results, we put forward the corresponding protective methods from the aspects of the circuits level and adaptive control respectively.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"033005-1-033005-8"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45548530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-05DOI: 10.11884/HPLPB202133.200264
Zhang Wanli, Shi Yunlei, He Yong, Shen Jie, Pan Xuchao, Fang Zhong, Chen Hong
To study the damage effects of lightning electromagnetic pulses on the UAV airborne GPS module, the understanding of the transient interference, permanent damage process and the damage threshold of GPS modules by lightning electromagnetic pulses was obtained, through a combination of simulation and experimental analysis. Based on the analysis results of lightning current, CST was used to simulate the complex electromagnetic field and coupling voltage on the GPS cable. The data communication ports of the typical airborne GPS module was subjected to a lightning pulse injection test. The research results show that: with the continuous enhancement of the injected lightning pulse, the influence on the GPS output waveform kept on increasing. And finally, the function to transmit position information was lost and physical damage occurred. The lightning impulse damage threshold of the GPS data input port is 314.5 V, the lightning impulse damage threshold of the GPS data output port is 235.2 V.
{"title":"Study on damage effects of lightning electromagnetic pulse on typical airborne GPS module","authors":"Zhang Wanli, Shi Yunlei, He Yong, Shen Jie, Pan Xuchao, Fang Zhong, Chen Hong","doi":"10.11884/HPLPB202133.200264","DOIUrl":"https://doi.org/10.11884/HPLPB202133.200264","url":null,"abstract":"To study the damage effects of lightning electromagnetic pulses on the UAV airborne GPS module, the understanding of the transient interference, permanent damage process and the damage threshold of GPS modules by lightning electromagnetic pulses was obtained, through a combination of simulation and experimental analysis. Based on the analysis results of lightning current, CST was used to simulate the complex electromagnetic field and coupling voltage on the GPS cable. The data communication ports of the typical airborne GPS module was subjected to a lightning pulse injection test. The research results show that: with the continuous enhancement of the injected lightning pulse, the influence on the GPS output waveform kept on increasing. And finally, the function to transmit position information was lost and physical damage occurred. The lightning impulse damage threshold of the GPS data input port is 314.5 V, the lightning impulse damage threshold of the GPS data output port is 235.2 V.","PeriodicalId":39871,"journal":{"name":"强激光与粒子束","volume":"33 1","pages":"033001-1-033001-7"},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44553497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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