Defocus blur in images is often the result of inadequate camera settings or depth of field restrictions. In recent years, with the emergence and advancement of deep learning, learning representation-based methods have achieved remarkable success in the field of image defocus enhancement. In this paper, a rapid axial scanning system was proposed for efficient acquisition of defocused-enhancement datasets. A multi-focus image sequence with different focus depths of a same scene is captured, and it is utilized to generate a full-focus image (ground truth) through image fusion, to build a set of defocused enhancement datasets. Multiple defocused-enhancement datasets can be obtained based on this approach. Experimental results confirm the feasibility and effectiveness.
{"title":"Rapid axial scanning system for acquisition of defocus-enhanced dataset","authors":"Zilong Li, Jiaqing Dong, Guijun Wang, Wenhua Zhong, Qiegen Liu, Xianlin Song","doi":"10.1117/12.2684981","DOIUrl":"https://doi.org/10.1117/12.2684981","url":null,"abstract":"Defocus blur in images is often the result of inadequate camera settings or depth of field restrictions. In recent years, with the emergence and advancement of deep learning, learning representation-based methods have achieved remarkable success in the field of image defocus enhancement. In this paper, a rapid axial scanning system was proposed for efficient acquisition of defocused-enhancement datasets. A multi-focus image sequence with different focus depths of a same scene is captured, and it is utilized to generate a full-focus image (ground truth) through image fusion, to build a set of defocused enhancement datasets. Multiple defocused-enhancement datasets can be obtained based on this approach. Experimental results confirm the feasibility and effectiveness.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124211687","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}
Huayang Wang, Tianshu Ma, Yuhui Liu, Changlei Wang
All-perovskite tandem solar cells (TSCs) show an effective way to overcome the efficiency limit of single-junction perovskite solar cells (PSCs). Low-bandgap mixed tin-lead perovskite bottom subcell is a critical component in all perovskite TSCs, which are currently limited by the relatively low efficiency and poor stability of the bottom subcells. Here in this work, we use multifunctional taurine material to dope and modify the PEDOT:PSS hole transport layer (HTL) for better optical transmittance and charge transporting properties, enabling efficient low-bandgap PSCs with highly improved open circuit voltages and short circuit current densities. Taurine has a suitable refractive index to reduce light reflection loss when introduced at the interface of PEDOT:PSS/perovskite film. Moreover, taurine improves the energy level alignments and facilitates charge transfer dynamics in the low-bandgap PSCs when doped into the PEDOT:PSS HTL. Finally, the synergistic effects of the interface modification and bulk doping of PEDOT:PSS with taurine leads to significantly enhanced efficiencies of over 22% and 26% for low-bandgap PSCs and all-perovskite TSCs, respectively.
{"title":"Taurine modified hole transport layers for efficient low-bandgap perovskite solar cells","authors":"Huayang Wang, Tianshu Ma, Yuhui Liu, Changlei Wang","doi":"10.1117/12.2684547","DOIUrl":"https://doi.org/10.1117/12.2684547","url":null,"abstract":"All-perovskite tandem solar cells (TSCs) show an effective way to overcome the efficiency limit of single-junction perovskite solar cells (PSCs). Low-bandgap mixed tin-lead perovskite bottom subcell is a critical component in all perovskite TSCs, which are currently limited by the relatively low efficiency and poor stability of the bottom subcells. Here in this work, we use multifunctional taurine material to dope and modify the PEDOT:PSS hole transport layer (HTL) for better optical transmittance and charge transporting properties, enabling efficient low-bandgap PSCs with highly improved open circuit voltages and short circuit current densities. Taurine has a suitable refractive index to reduce light reflection loss when introduced at the interface of PEDOT:PSS/perovskite film. Moreover, taurine improves the energy level alignments and facilitates charge transfer dynamics in the low-bandgap PSCs when doped into the PEDOT:PSS HTL. Finally, the synergistic effects of the interface modification and bulk doping of PEDOT:PSS with taurine leads to significantly enhanced efficiencies of over 22% and 26% for low-bandgap PSCs and all-perovskite TSCs, respectively.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134302356","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}
Conventional enzyme-based glucose sensors have good selectivity and sensing performance, but the disadvantages of the enzyme itself (enzyme activity is susceptible to pH and temperature) lead to a limited number of uses and result in high costs. Therefore, photoelectrochemical enzyme-free glucose sensors have attracted research interest in recent years. In this work, the TiO2/CuO heterojunction was constructed and photoelectrochemical enzyme-free glucose sensing was realized. The sensing sensitivity of the TiO2/CuO heterojunction photoelectrode prepared by magnetron sputtering and thermal annealing process was 864 μAμM-1 cm-2 in the range of 1–9 mM with a detection limit of 58.6 μM at 0.2 V, exhibiting satisfactory stability as well as interference resistance. This better sensing performance mainly comes from: 1) the absorption of photogenerated carriers generated from sunlight by TiO2 films, which participate in glucose redox; 2) the conversion of the metal valence state (Cu2+/Cu3+) of the P-type semiconductor CuO under alkaline conditions can promote glucose redox; 3) the heterojunction formed by CuO and TiO2 reducing the compounding of photogenerated carriers thus improving the photoelectric conversion efficiency. The heterojunction formed by CuO and TiO2 greatly facilitates the surface carrier transfer of glucose oxidation reaction. This work provides a new way for enzyme-free glucose sensing and promotes the development of glucose detection technology.
{"title":"Enzyme-free photoelectrochemical sensing of glucose based on the TiO2/CuO heterojunction","authors":"Shengchen Ke, Ruoxi Zhang, Weijian Zhu, Wenxiang Lu, Lu Ma, Linling Qin, Shaolong Wu","doi":"10.1117/12.2684880","DOIUrl":"https://doi.org/10.1117/12.2684880","url":null,"abstract":"Conventional enzyme-based glucose sensors have good selectivity and sensing performance, but the disadvantages of the enzyme itself (enzyme activity is susceptible to pH and temperature) lead to a limited number of uses and result in high costs. Therefore, photoelectrochemical enzyme-free glucose sensors have attracted research interest in recent years. In this work, the TiO2/CuO heterojunction was constructed and photoelectrochemical enzyme-free glucose sensing was realized. The sensing sensitivity of the TiO2/CuO heterojunction photoelectrode prepared by magnetron sputtering and thermal annealing process was 864 μAμM-1 cm-2 in the range of 1–9 mM with a detection limit of 58.6 μM at 0.2 V, exhibiting satisfactory stability as well as interference resistance. This better sensing performance mainly comes from: 1) the absorption of photogenerated carriers generated from sunlight by TiO2 films, which participate in glucose redox; 2) the conversion of the metal valence state (Cu2+/Cu3+) of the P-type semiconductor CuO under alkaline conditions can promote glucose redox; 3) the heterojunction formed by CuO and TiO2 reducing the compounding of photogenerated carriers thus improving the photoelectric conversion efficiency. The heterojunction formed by CuO and TiO2 greatly facilitates the surface carrier transfer of glucose oxidation reaction. This work provides a new way for enzyme-free glucose sensing and promotes the development of glucose detection technology.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114476923","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}
An optimization algorithm for binary amplitude-only hologram (BAOH) based on the point source method (PSM) with the holographic viewing window (HVW) by using particle swarm optimization (PSO) is proposed. We convert the 256 grayscale levels of each pixel of the original image into an 8-bit binary format and sequentially extract the effective bits of each pixel to generate eight frames of binary original images. Then we introduce random constant phases to be optimized on the wavefront phase of the point source to superimpose the wavefront and generate a grayscale hologram with Burch encoding and binarize it. PSO algorithm is used to search for the optimized constant phase (OCPs) corresponding to each point source wavefront to generate an optimized BAOH. The grayscale representation of the reconstructed image is achieved by sequentially loading eight frames of BAOH on the digital micromirror device (DMD) while controlling the pulse width doubling the illumination of the laser. Simulation results show that the speckle noise of the reconstructed image using the proposed method is significantly suppressed compared with that using the random phase method (RPM), which demonstrates the feasibility of the proposed method.
{"title":"Optimization algorithm for amplitude-only hologram based on digital micromirror device","authors":"Ming-xing Zhou, Yun Chen, Jianhong Wu","doi":"10.1117/12.2684986","DOIUrl":"https://doi.org/10.1117/12.2684986","url":null,"abstract":"An optimization algorithm for binary amplitude-only hologram (BAOH) based on the point source method (PSM) with the holographic viewing window (HVW) by using particle swarm optimization (PSO) is proposed. We convert the 256 grayscale levels of each pixel of the original image into an 8-bit binary format and sequentially extract the effective bits of each pixel to generate eight frames of binary original images. Then we introduce random constant phases to be optimized on the wavefront phase of the point source to superimpose the wavefront and generate a grayscale hologram with Burch encoding and binarize it. PSO algorithm is used to search for the optimized constant phase (OCPs) corresponding to each point source wavefront to generate an optimized BAOH. The grayscale representation of the reconstructed image is achieved by sequentially loading eight frames of BAOH on the digital micromirror device (DMD) while controlling the pulse width doubling the illumination of the laser. Simulation results show that the speckle noise of the reconstructed image using the proposed method is significantly suppressed compared with that using the random phase method (RPM), which demonstrates the feasibility of the proposed method.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127425455","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}
H. Liu, Xingru Gao, Xiujuan Luo, Yu Zhang, Minglai Chen, Z. Yue
Coherent imaging with multi-beam laser is considered as a key technique in ground based imaging. In the paper, the composition of multi-beam laser coherent imaging system is demonstrated in detail, the constraints between subsystem parameters are analyzed, and the array layout of multi-beam laser imaging transmitter is proposed. In the system, the laser aiming accuracy has an important impact on the imaging. The theoretical simulation indicates that the aiming error of the emitter array should be controlled within 5%. Finally, Design equivalent aperture as Φ1.5m experimental system and Imaging target successfully, verifying the correctness and feasibility of the system, and promoting the implementation of multi-beams coherent imaging technology.
{"title":"Study on multi-beam laser coherent imaging system","authors":"H. Liu, Xingru Gao, Xiujuan Luo, Yu Zhang, Minglai Chen, Z. Yue","doi":"10.1117/12.2644089","DOIUrl":"https://doi.org/10.1117/12.2644089","url":null,"abstract":"Coherent imaging with multi-beam laser is considered as a key technique in ground based imaging. In the paper, the composition of multi-beam laser coherent imaging system is demonstrated in detail, the constraints between subsystem parameters are analyzed, and the array layout of multi-beam laser imaging transmitter is proposed. In the system, the laser aiming accuracy has an important impact on the imaging. The theoretical simulation indicates that the aiming error of the emitter array should be controlled within 5%. Finally, Design equivalent aperture as Φ1.5m experimental system and Imaging target successfully, verifying the correctness and feasibility of the system, and promoting the implementation of multi-beams coherent imaging technology.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132380709","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}
Er,Yb co-doped glass has been widely used to generate 1.5-μm Q-switched pulsed lasers, which are in strong demands for such applications as remote sensing telemetry, LiDAR and imaging. Aiming to meet such demands, we developed a ultra-compact and lightweight diode-pumped solid-state laser, which can achieve a Q-switched pulse energy of 1.5 mJ at an eye-safe wavelength of 1534-nm with an optical conversion efficiency of 3.4% under pump power of 22 W in the operating frequency range of 1-10 Hz. In the experiment, a 940-nm semiconductor laser was used to pump an Er,Yb co-doped glass with a saturable absorber (Co2+:Spinel) to realize Q switching. A theoretical model was then developed to simulate and characterize the Er,Yb co-doped glass laser. The model takes into account not only the excited state absorption and up-conversion effects, but also the thermal effects on the laser. The simulation results are in high agreement with the experimental ones.
{"title":"Ultra-compact Q-switched eye-safe glass laser","authors":"Wei Wang, Yong Wang, Siwei Zhang","doi":"10.1117/12.2643791","DOIUrl":"https://doi.org/10.1117/12.2643791","url":null,"abstract":"Er,Yb co-doped glass has been widely used to generate 1.5-μm Q-switched pulsed lasers, which are in strong demands for such applications as remote sensing telemetry, LiDAR and imaging. Aiming to meet such demands, we developed a ultra-compact and lightweight diode-pumped solid-state laser, which can achieve a Q-switched pulse energy of 1.5 mJ at an eye-safe wavelength of 1534-nm with an optical conversion efficiency of 3.4% under pump power of 22 W in the operating frequency range of 1-10 Hz. In the experiment, a 940-nm semiconductor laser was used to pump an Er,Yb co-doped glass with a saturable absorber (Co2+:Spinel) to realize Q switching. A theoretical model was then developed to simulate and characterize the Er,Yb co-doped glass laser. The model takes into account not only the excited state absorption and up-conversion effects, but also the thermal effects on the laser. The simulation results are in high agreement with the experimental ones.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"303 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132405422","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}
Taking advantage of the technology of dispersive Fourier transform (DFT), we experimentally observed the evolutionary dynamics of convention solitons(CSs) in a simplified Erbium-doped fiber laser. The periodic beating behavior that occurs during the build-up and disappearance of conventional solitons was discovered in a nonlinear polarization rotation (NPR) fiber lasers. We suggest the reasonable assumption that the periodic beating during the dynamic evolution may be a close connection with the modulation depth of the intracavity saturable absorber The results of this study can deepen researchers' understanding of the evolution of CSs and provide additional judgment dimensions for optimizing the laser parameters.
{"title":"Color characterization of multispectral camera based on pattern search algorithm","authors":"Long Ma, Haitang Chen","doi":"10.1117/12.2643642","DOIUrl":"https://doi.org/10.1117/12.2643642","url":null,"abstract":"Taking advantage of the technology of dispersive Fourier transform (DFT), we experimentally observed the evolutionary dynamics of convention solitons(CSs) in a simplified Erbium-doped fiber laser. The periodic beating behavior that occurs during the build-up and disappearance of conventional solitons was discovered in a nonlinear polarization rotation (NPR) fiber lasers. We suggest the reasonable assumption that the periodic beating during the dynamic evolution may be a close connection with the modulation depth of the intracavity saturable absorber The results of this study can deepen researchers' understanding of the evolution of CSs and provide additional judgment dimensions for optimizing the laser parameters.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127712814","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}
Kesheng Guo, Q. Hu, Qiaoyi Liu, B. He, Tianyun Li, Lang Hu
Diamond films are transparent in a wide range of wavelengths (ultraviolet-far-infrared-terahertz bands are transmitted), and are used in optical windows, aircraft missile hoods, etc., where low-energy protons (keV magnitude) in space will create gaps, vacancies and other material radiation effects. In this paper, diamond films with different grain sizes were grown on the surface of fused silica by microwave plasma chemical vapor deposition, and the influence of proton irradiation on the surface morphology, optical transmittance and Raman spectrum of diamond films was studied. The ion distribution and vacancy distribution of diamond thin films under proton irradiation were calculated and analyzed by calculation (Monte Carlo method). When the flow ratio of methane/hydrogen was 1%, by adjusting the height of the sample stage, diamond nanocrystalline films with different growth temperatures were prepared on the surface of fused silica. After proton irradiation, the transmittance curve of the film has a slight red shift, and the transmittance decreases significantly in the wavelength range of 500-900nm, and the maximum transmittance decreases by 5-7%. After proton irradiation, the peak intensities of the Raman spectra become weaker, and the peak intensities of both the diamond phase and the non-diamond phase are weakened. Under the irradiation of protons with energy of 50keV, the main action depth of the diamond film is in the range of 2-5 microns, and the effect on the surface and deeper regions is not obvious, but gaps and vacancies are generated at a depth of several micrometers.
{"title":"Effects of space low energy proton irradiation on optical properties of diamond thin films","authors":"Kesheng Guo, Q. Hu, Qiaoyi Liu, B. He, Tianyun Li, Lang Hu","doi":"10.1117/12.2645860","DOIUrl":"https://doi.org/10.1117/12.2645860","url":null,"abstract":"Diamond films are transparent in a wide range of wavelengths (ultraviolet-far-infrared-terahertz bands are transmitted), and are used in optical windows, aircraft missile hoods, etc., where low-energy protons (keV magnitude) in space will create gaps, vacancies and other material radiation effects. In this paper, diamond films with different grain sizes were grown on the surface of fused silica by microwave plasma chemical vapor deposition, and the influence of proton irradiation on the surface morphology, optical transmittance and Raman spectrum of diamond films was studied. The ion distribution and vacancy distribution of diamond thin films under proton irradiation were calculated and analyzed by calculation (Monte Carlo method). When the flow ratio of methane/hydrogen was 1%, by adjusting the height of the sample stage, diamond nanocrystalline films with different growth temperatures were prepared on the surface of fused silica. After proton irradiation, the transmittance curve of the film has a slight red shift, and the transmittance decreases significantly in the wavelength range of 500-900nm, and the maximum transmittance decreases by 5-7%. After proton irradiation, the peak intensities of the Raman spectra become weaker, and the peak intensities of both the diamond phase and the non-diamond phase are weakened. Under the irradiation of protons with energy of 50keV, the main action depth of the diamond film is in the range of 2-5 microns, and the effect on the surface and deeper regions is not obvious, but gaps and vacancies are generated at a depth of several micrometers.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131998670","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}
The dark spots in the speckle pattern are the phase singularities, which contain rich information regarding the phase of the speckle field and determine the distribution of the speckle field. The generation of optical vortices using speckle is a simple, effective, and easy to implement method. we designed an experimental scheme that can generate a optical vortex to explain the properties of phase singularities in a speckle field. Through numerical simulation, we obtained the distribution of the real part zero line and the imaginary part zero line in the speckle field, and drew the singular skeleton of the speckle field, indicating that there are phase singularities in the speckle field.The experimental results are in agreement with those obtained from numerical simulations, thus verifying that the generation of optical vortices can be produced using the scattering method. The experimental scheme is simple and easy to operate.
{"title":"Using speckle to generate optical vortices","authors":"Hai-bin Sun, Tingting Liu, Jun Chen, P. Sun","doi":"10.1117/12.2643517","DOIUrl":"https://doi.org/10.1117/12.2643517","url":null,"abstract":"The dark spots in the speckle pattern are the phase singularities, which contain rich information regarding the phase of the speckle field and determine the distribution of the speckle field. The generation of optical vortices using speckle is a simple, effective, and easy to implement method. we designed an experimental scheme that can generate a optical vortex to explain the properties of phase singularities in a speckle field. Through numerical simulation, we obtained the distribution of the real part zero line and the imaginary part zero line in the speckle field, and drew the singular skeleton of the speckle field, indicating that there are phase singularities in the speckle field.The experimental results are in agreement with those obtained from numerical simulations, thus verifying that the generation of optical vortices can be produced using the scattering method. The experimental scheme is simple and easy to operate.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"320 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132139246","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}
Han Bin, Liu-Hsu Lin, Hao Qun, Cao Jie, Luo Jiahong, Zhang Bo Rui, Zhang Lei
Aiming at the problem of low initial accuracy of AGV after steering, we design a vehicle steering control algorithm based on an improved pure tracking model. Firstly, in order to improve the adaptive ability of the pure tracking model, we estimate the look-ahead distance of the pure tracking model in real time through the PSO algorithm. We use the IWO algorithm to optimize the ability of the particle swarm finding fitness, so as to avoid the particle swarm easily falling into local convergence during the working process. Secondly, in order to meet the requirements of the improved pure tracking model for continuous curvature, we add an easing curve to the traditional fishtail U-turn trajectory, and design a non-tangential round fishtail U-turn. Finally, we carry out a simulation test of the algorithm. The test results show that: using the IWO-PSO-PTM algorithm, when the vehicle speed is 0.75m/s for U-turn, the maximum lateral error is less than 0.42m, and the root mean square error is 0.18m. And when the straight line travel distance exceeds 4m after line change, the maximum lateral error is less than 0.02m. The pure tracking algorithm improved by IWO-PSO can effectively improve the initial accuracy of the AGV after steering.
{"title":"Research on AGV steering control algorithm based on improving pure tracking model","authors":"Han Bin, Liu-Hsu Lin, Hao Qun, Cao Jie, Luo Jiahong, Zhang Bo Rui, Zhang Lei","doi":"10.1117/12.2643696","DOIUrl":"https://doi.org/10.1117/12.2643696","url":null,"abstract":"Aiming at the problem of low initial accuracy of AGV after steering, we design a vehicle steering control algorithm based on an improved pure tracking model. Firstly, in order to improve the adaptive ability of the pure tracking model, we estimate the look-ahead distance of the pure tracking model in real time through the PSO algorithm. We use the IWO algorithm to optimize the ability of the particle swarm finding fitness, so as to avoid the particle swarm easily falling into local convergence during the working process. Secondly, in order to meet the requirements of the improved pure tracking model for continuous curvature, we add an easing curve to the traditional fishtail U-turn trajectory, and design a non-tangential round fishtail U-turn. Finally, we carry out a simulation test of the algorithm. The test results show that: using the IWO-PSO-PTM algorithm, when the vehicle speed is 0.75m/s for U-turn, the maximum lateral error is less than 0.42m, and the root mean square error is 0.18m. And when the straight line travel distance exceeds 4m after line change, the maximum lateral error is less than 0.02m. The pure tracking algorithm improved by IWO-PSO can effectively improve the initial accuracy of the AGV after steering.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128693098","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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