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基于OpenMV摄像头的运动目标控制与自动追踪系统设计与实现

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现代电子技术 2024年第17期47卷 166-172页

作者：徐涢基王峥邹佳民王燊炀方健南昌交通学院交通运输学院江西南昌330100 南昌大学江西省机器人与焊接自动化重点实验室江西南昌330031

针对运动目标自动追踪系统复杂且成本较高等问题,文中旨在设计一种成本低廉且易于部署的基于STM32F103C8T6、OpenMV摄像头和二维舵机云台的运动目标自动追踪系统,以解决传统自动追踪系统设备昂贵、算法复杂难于推广的问题,并为OpenMV摄... 详细信息

针对运动目标自动追踪系统复杂且成本较高等问题,文中旨在设计一种成本低廉且易于部署的基于STM32F103C8T6、OpenMV摄像头和二维舵机云台的运动目标自动追踪系统,以解决传统自动追踪系统设备昂贵、算法复杂难于推广的问题,并为OpenMV摄像头在安防监控等领域的应用提供新的思路。该系统主要由主控模块、OpenMV摄像头模块、二维舵机云台模块、电源模块、OLED显示模块组成,通过OpenMV摄像头模块识别特定阈值的色块或矩形图形,并处理色块与矩形角点位置信息,将处理后的数据通过串口通信发送给主控模块,再由主控模块通过PID算法与运动算法控制二维舵机云台模块运动,从而实现运动控制与自动追踪。最后通过激光笔测试装置实际追踪效果,整合数据进行分析验证,该运动目标控制与自动追踪系统的理论研究与设计能够达到目标效果。

关键词： OpenMV摄像头运动目标控制自动追踪系统 STM32F103C8T6 二维云台颜色识别 OLED PID

Precipitation of α_2 Phase in α+β Solution-Treated and Air-cooled Ti-Al-Sn-Zr-Mo-Si-Nd Alloys

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Journal of Materials Science & Technology 2001年第3期17卷 315-317页

作者： Jun ZHANG and Dong LI Institute of Metal Research, Chinese Academy of Sciences, shenyang 110016, China resent address: shenyang University, shenyang 110044, China E-mail: zhjun14@*** Chinese Acad Sci Met Res Inst Shenyang 110016 Peoples R China

A series of Ti-Al-Sn-Zr-Mo-Si-Nd alloys with various content of Al were solution treated in α+β phase field and air-cooled. The precipitation of a2 phase in cooling was investigated by transmission electron microscopic analysis The precipitation characteristic of α2 phase was discussed. The precipitation of α2 phase would proceed by the nucleation and growth of α2 phase dependent on the diffusion of Al atoms. And a comparison on the difference of precipitation of α2 phase was carried out under the conditions of air-cooling and quenching in water. The investigation showed that the air-cooling and even quenching could supply enough time for the precipitation and growth of α2 phase when Al content reached a certain value even though far away from the stoichiometric composition of Ti3Al.

关键词： Al Precipitation of Phase in Solution-Treated and Air-cooled Ti-Al-Sn-Zr-Mo-Si-Nd Alloys Ti Mo Sn Zr Nd Si

Global asymptotic stability of cellular neural networks with multiple delays

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Progress in Natural Science:Materials International 2006年第2期16卷 163-168页

作者： WANG Zhanshan and ZHANG Huaguang ( Key Laboratory of Process Industry Automation, Northeastern University, shenyang 110004, China Department of Information Engineering, shenyang Ligong University, shenyang 110168, China) [a]Key Laboratory of Process Industry Automation Northeastern University Shenyang China [b]Department of Information Engineering Shenyang Ligong University Shenyang China

Global asymptotic stability (GAS) is discussed for cellular neural networks (CNN) with multiple time delays. Several criteria are proposed to ascertain the uniqueness and global asymptotic stability of the equilibrium point for the CNN with delays. These criteria can eliminate the difference between the neuronal excitatory and inhibitory effects. Two examples are presented to demonstrate the effectiveness of the criteria.

关键词： cellular neural networks global asymptotic stability multiple time delays.

Soil Enzyme Activities with Greenhouse Subsurface Irrigation

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Pedosphere 2006年第4期16卷 512-518页

作者： ZHANG Yu-Long WANG Yao-Sheng College of Land and Environmental Sciences Shenyang Agricultural University Shenyang 110161 （China）

Various environmental conditions determine soil enzyme activities, which are important indicators for changes of soil microbial activity, soil fertility, and land quality. The effect of subsurface irrigation scheduling on activities of three soil enzymes (phosphatase, urease, and catalase) was studied at five depths (0-10, 10-20, 20-30, 30-40, and 40-60 cm) of a tomato greenhouse soil. Irrigation was scheduled when soil water condition reached the maximum allowable depletion (MAD) designed for different treatments (-10, -16,-25.-40, and-63 kPa). Results showed that soil enzyme activities had significant responses to the irrigation scheduling during the period of subsurface irrigation. The neutral phosphatase activity and the catalase activity were found to generally increase with more frequent irrigation (MAD of -10 and -16 kPa). This suggested that a higher level of water content favored an increase in activity of these two enzymes. In contrast, the urease activity decreased under irrigation, with less effect for MAD of -40 and -63 kPa. This implied that relatively wet soil conditions were conducive to retention of urea N, but relatively dry soil conditions could result in increasing loss of urea N. Further, this study revealed that soil enzyme activities could be alternative natural bio-sensors for the effect of irrigation on soil biochemical reactions and could help optimize irrigation management of greenhouse crop production.

关键词： irrigation scheduling soil enzyme activity subsurface irrigation tomato

Vibration Effects on the Structural Stability of Al-Ti Intermetallics by First-principles Calculations

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Journal of Materials Science & Technology 2010年第12期26卷 1071-1077页

作者： Hui Zhang and Shaoqing Wang shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,shenyang 110016,China [a] shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences shenyang 110016 China

The structural stability of the intermetallics AlTi3, Al2Ti, Al3Ti4 and Al3Ti in the Al-Ti system has been investigated using density functional theory （DFT） and density functional perturbation theory （DFPT）. The calculated ground-state convex hull is in agreement with the experimental researches. Al3Ti4 （hP7） is metastable at 0 K and may be stabilized as the temperature increases due to the effects of the vibration entropy. For Al2Ti, r-Al2Ti is stable at 0 K and h-Al2Ti is stabilized by the vibration entropy at high temperatures. Al3Ti （tI16） is unstable considering vibration effects and Al3Ti （tI8） is the most stable structure at 0 K.

关键词： First-principles Al-Ti Vibration Crystal structure

Strain-induced Microstructure Refinement in a Tool Steel Subjected to Surface Mechanical Attrition Treatment

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Journal of Materials Science & Technology 2010年第3期26卷 258-263页

作者： Shoudan Lu,Zhenbo Wang and Ke Lu shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,shenyang 110016,China [a] shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences shenyang 110016 China

A nanostructured surface layer has been fabricated on an AISI H13 tool steel by means of surface mechanical attrition treatment （SMAT）.Strain-induced refinement processes of ferrite grains and carbide particles have been investigated by transmission electron microscopy （TEM） and scanning electron microscopy （SEM） in the SMAT surface *** refinement of ferrite is found to be dominated by dislocation activities and greatly facilitated by a large number of carbide particles at a depth 〉20 μ*** comparisons with microstructure refinement processes in other SMAT ferrite steels indicate that a larger volume fraction of carbide particles with a lower shear strength is expected to facilitate the refinement process of ferrite grains.

关键词： Nanostructured and nanocrystalline material AISI H13 tool steel Grain refinement Surface mechanical attrition treatment (SMAT) Carbides

Bimolecular Self-Condensation of Pyrrolizinones Induced byGrignard Reagent

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Chinese Chemical Letters 1999年第11期10卷 893-894页

作者： Wen Ge YAN Shou Fang ZHANG Li Jun WU(shenyang Pharmaceutical University, shenyang 110015. Shengyang Pharmaceut Univ Shenyang 110015 Peoples R China

The products of pyrrolizinones with 3-methoxyphenyl magnesium bromide were bimolecular condensation compounds, not the related alcohol, and they were confirmed by IR, H-1-NMR, C-13-NMR. HMQC, HMBC. NOE-differ., MS and... 详细信息

关键词： pyrrolizinone self-condensation character

Studies on the synthesis and antifungal activity of thiochromanone derivatives

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Chinese Chemical Letters 1997年第11期8卷 939-942页

作者： Lin FANG Chum GUO Qi Bing ZHANG (Department of pharmaceutics, shenyang Pharmaceutical University, shenyang 110015. shenyang Pharmaceut Univ Dept Pharmaceut Shenyang 110015 Peoples R China

In this paper nine New Mannich bases of 6-fluoro-thiochromanone and eight new 3-substituted-6.8-dichloro thiochromanones were synthesized and their structures were confirmed by IR, H-1-NMR and elementary analysis. Mos... 详细信息

关键词： ppm IR Studies on the synthesis and antifungal activity of thiochromanone derivatives NH

Influence of V^(5.) Ions on Photocatalytic Activity of TiO_2 Films Prepared by Micro-plasma Oxidation Method

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稀有金属材料与工程 2011年第S3期40卷 118-122页

作者： Shao Zhongcai, Jiang Haitao, Yang Li, Wei Shouqiang shenyang Ligong University, shenyang 11015., China shenyang Ligong Univ Sch Environm & Chem Engn Shenyang 110159 Peoples R China

Microporous titanium dioxide thin films have been fabricated on titanium plates by the micro-plasma oxidation method with the electrolyte of Na3PO4+Na2B4O7. The influence of V5. ions addition in the electrolyte on the photocatalytic activities was investigated. A kind of typical textile industry pollutant (methylene blue) was used to evaluate the photo-catalytic activity of the films. The results showed that this activity of the films had been improved by adding V5. ions into the electrolyte solution. The removal of methylene blue reaches 90% for 60 min when V5. ions addition concentrate is 0.3 g/L. X-ray diffraction, scanning electron microscopy and atomic force microscopy techniques were applied to characterize the modified films. Experimental results show that the improvement in activity was related to the forming of titanium dioxide lattice distortion, which could accept more photoexcitated holes and produce more strong surface free radicals to oxidate adsorptive molecules.

关键词： microarc oxidation ion doping titanium dioxide photocatalytic activity