图像作为当今人们获取信息、感知世界的重要载体,不仅是生活重要组成部分之一,还在各个行业发挥着重要作用.常见的图像模糊分为运动模糊与失焦模糊,严重影响图片质量与观看体验.针对这一问题,对图像质量的检测进行研究,设计一种基于再模糊理论的图像质量检测方法.将待测图像经过再模糊化处理后,对再模糊前后的图像提取边缘并计算图像间差异,以此评判图像是否模糊.利用Canny算子进行边缘检测并利用Otsu算法进行双阈值抑制.最后,在公开的LIVE图像数据集上进行实验.结果表明,该方法能有效检测图像是否模糊,且优于其他无参考图像质量评估算法,符合肉眼主观评价.

针对生活垃圾的高效分类及搬运处理,设计了一款以边缘嵌入式AI设备Jetson Nano为控制器的光电智能小车系统,该系统设计以YOLOv5为目标检测算法,以Pytorch1.8.1为深度学习框架.使智能小车从指定区域出发,通过自身的光电传感器在指定范围内搜寻垃圾,利用六轴机械臂对垃圾进行分拣并送到指定分类地点.对采集到的5048张图片(包括5种垃圾类别)进行300次的迭代训练,实验测试结果表明:平均精确度达到91.8％,准确率达到94.5％,召回率达到89.03％.

航空铆钉的尺寸偏差会增加航空事故发生的可能性.为了实现航空铆钉尺寸检测的高精度与智能化,提出一种基于机器视觉的航空铆钉尺寸检测方法.通过边缘检测算法对铆钉进行自动识别与检测,可减少航空铆钉尺寸的误差.基于航空铆钉产品规范,分析得出各项尺寸参数要求与事件流程,使用OpenCV作为开发平台,采用阈值分割算法与分水岭算法进行图像分割;同时,通过平滑处理、形态学、轮廓提取算法完成图像处理.实测结果表明,在±0.005 mm精度下,铆钉尺寸检测结果与实际值的吻合度达到90％以上.

设计并实现了采用MSP430单片机和CC1101射频芯片,基于超声波和射频到达时间差的低功耗、高精度的室内定位系统,用于待定位标签的定位和追踪.系统主要采用超声波收发分离的方式,电子标签首先发送射频信号探寻信号范围内的阅读器数量,确定阅读器的数量后,再给阅读器发送一个射频信号,发出射频信号的同时,发送超声波信号,阅读器启用定时器计算接收到射频信号与超声波信号之间的时间差,并将数据传送给中心控制主机,控制主机通过三个圆相交于一点的方式计算出待定位标签的位置,并通过MFC程序图形化显示出来.实验结果表明,该系统具有较高的定位精度.

This paper presented a embedded technology-based Wireless Voice Teaching System that used the terminal of ARM7 development board for the students,and ordinary notebook computer for teacher,through the establishment of local area wireless network to implement the real-time transportation of multimedia by RTP protocol.The System was characterized by wireless network and embedded terminal.The voice teaching could be taken in any classroom.In addition,the System cost far less than the cost of traditional Voice Teaching System.

This paper designed an embedded distributed database using for dual redundancy master network equipment by combining distributed database technology with redundant backup technology,provided a new way to achieve dual-redundant backup master network equipment.In addition,it indicated the advantages when this new architecture was used in three-layer switch.

In this paper,it was introduced a design method of Network MP3 player based on Qtopia Core.By MP3,the music was downloaded from FTP server to local file system by FTP protocol.Using file stream to decode MP3 files,it was implementd these primary functions: files transports controllplay and pause,move back,skip forward,adjust volume of music,and song status showing.

This paper is the study of OFDM SNR estimation algorithm system.using DSP chips and IF receiver platform composed by AD6640 and AD6620 to apply it in actual OFDM transmission system.SNR estimation plays an important role in many wireless communication systems,it provides the information of the power control in adaptive transmission techniques and channel quality needed in Bit allocation algorithm.DSP chips are mainstream signal processing devices now,they have powerful digital signal processing performance,by using C language it can easily realize complex algorithms in most systems.

门禁系统是新型现代化安全管理系统,是解决重要部门出入口实现安全防范管理的有效措施.门禁系统软件设计分为两个部分,一是上位机上的软件设计,主要完成操作员的注册、登录、向门禁控制器发送命令等功能.二是门禁控制器上的软件设计,门禁控制器上的软件设计是基于 Linux 操作系统的,主要的功能是控制用户的进出入、USB 摄像头实时监控.

A novel location system designed to solve the problem of antonomous robot moving in the planar region where has different color grid line,is proposed.16-bits microcontroller MC9S12DG128B produced by Freescale is chosen as the core of signal detection and data processing,the strapdown inertial navigation is adopted as the main method.The coordinate and moving direction is figured out by collecting the robot's acceleration and angular velocity information continuously.In order to resolve the accumulative error caused by long-distance navigation,photoelectric sensor array is used to calibrate the error and improve the location precision.The experiment results show that the system program is feasible.

The application of file system in EEPROM AT24C512 is introduced.In embedded Linux system,block device drivers are programmed for EEPROM and formatted into the corresponding file system;therefore,EEPROM is accessed through files.

基于linux2.6.22版本的USB设备驱动要求,介绍了linux下的USB core的工作原理,指出了开发USB驱动必须要用到的四个重要的描述符以及USB接口驱动的开发原理和开发方法。

针对交叉编译环境的建立,修改Makefile,设置flash分区,配置内核,编译内核以及下载内核映像到开发板等设计,给出了以s3c2410为核心的嵌入式Linux内核的裁剪与移植过程。

本文提出一种以内嵌USB2.0接口和8051 MCU的高性能单片机作为数据传输通道,以FPGA作为控制器的数据采集系统设计方案,在该方案中,主要介绍了信号采集保持原理,USB的驱劝和固件开发和利用SOPC技术构建一个高速数据采集系统方案,并给出实现高速数据采集系统的软硬件开发过程.

本文分析了Linux实时性方面的不足,研究了提高Linux实时性的主要方法:RTLinux、可抢占式内核和低延迟内核。

The article presents a design method of high-speed data acquisition system based on sopc (System On a Programmable Chip) and USB2.0 Interface, realizes a virtual instrument on Labview plat, and introduces the work principle of USB device-CY7c68013, SOPC functional module used of FPGA and the methods on how to use Labview to design the virtual instrument, and expounds the hardware realization of this plan.

Introduces how to capture all file operation requests at the kernel layer of Windows operating system by using DDK and IFS Kit, then, on the basis of it, detailedly discusses how to realize the kinds of filtrations to the appointed file, and realizes optionally filtrating and setting rule to driver by the application program.Also, discusses the different read/write characteristics of different type of file and how to achieve victory under this difference, introduces some useable source codes relate to the file filter driver.

It was presented the Control System of Logistics Automated Guided Vehicle System(AGVS) with the structure of amulti-level Network-based Control System(NCS).This System was used the control mode which was combined distributed control with centralized control.This Control System had the merits of integrity and the autonomy of the local work.AGV Management System was more complicated.It was introduced matrix management approach to the Management System.This management method had the advantages of simple’ intuitive,and rigorous reasoning.It was used the comparative mode of constructor function,instead of the form of fuzzy reasoning,and made it more stringent simple and intuitive.

The Linux application to the embedded aspect is extensive and the improvement of the Linux performance and application to the real-time character becomes an extremely potential development direction.One of the main factors affecting the Linux real-time character is that the Linux kernel is non-preemptive and the research on the Linux preemptive kernel character is looming.The realization principle about the preemptive lock,the mutex lock,the interruption handling,the scheduling function and the solutions to the improvement are described in detail.The modified kernel is tested and the comparison with the original kernel is made.

本设计介绍了一种采用STC系列带A/D转换的单片机STC12C2052AD设计的比例遥控系统。该系统主要包括发射机电路和接收机电路。其中,发射机电路采用多个电位器(可变电阻)分压作为比例控制信号,通过对发射端单片机的软件程序设计将输出的多路经过A/D转换后的数字信号进行编码并由串行口送到发射模块发射;接收机电路的任务则是把接收到的信号进行适当放大并从中解调出编码信号,然后通过对接收端单片机的软件程序设计将该信号转换成相应的电动机驱动控制信号,从而完成对模型的方向和速度的控制。