数码相机的控制系统设计

电气工程论文编号:DQ168   论文字数:16097,页数:41

目 录
摘  要 I
Abstract II
1．引言 1
1.1 数码相机发展历史 1
1.2控制系统的历史、现状和趋势 1
1.3 DSP的历史、现状和趋势 2
2. 自动对焦原理 3
2.1自动对焦历史及现状 3
2.2自动对焦控制原理 5
2.3本论文的研究内容 9
3．系统硬件的构成 10
3.1 DSP系统设计 10
3.1.1 DSP系统简介 11
3.1.2 DSP芯片及其简介 12
3.1.3 DSP系统电路设计 16
3.1.4步进电机硬件设计 20
3.2 CMOS图像传感器 21
3.2.1 CMOS图像传感器简介 22
3.2.2 CMOS图像传感器OV7620 27
3.2.3 CMOS图像传感器电路设计 28
4．软件设计 30
4.1 整体软件设计 30
4.2 自动对焦软件设计 32
4.3 步进电机驱动软件设计 33
5. 总  结 36
致 谢 37
参考文献 38

摘  要

 数码相机的出现是现代通信、计算机产业、照相产业高速发展的产物。随着电信、计算机产品的普及和家庭化，数码相机的应用领域也日益广泛。数码相机像素多少、曝光方式、附加功能等一直是我们选购数码相机时主要关注点，为满足用户越来越高的要求数码相机的控制系统也不断在发展。
 本系统的设计从硬件和软件两方面进行研究设计。硬件方面要完成原理图的设计，器件的选型，控制电路、驱动电路、隔离电路等模块的设计；软件方面要研究图象聚焦的数学模型，聚焦控制策略的选择，驱动电机等模块的软件设计。硬件电路采用Protel软件设计原理图；软件编写系统流程图和各模块流程图。
关键字：数码相机；控制系统；DSP
 
Abstract

 The appearance of digital cameras is the product of a modern communications and computer industries, the rapid development of photographic products industry. With the universalling of the telecommunications, computer products，digital cameras can be applicated in more and more areas. The number of pixels of digital camera, exposure mode, additional functions have been condensered when we buy a digital camera. The digital camera control system has been in developmentbecause of the growing demands.
 The design of the system has two aspects of study design of hardware and software. I will complete the schematic design as Hardware, the selection of devices, control circuits, drive circuitry, isolation circuitry, such as module design as Hardware; I will study the mathematical model of image focus, focus on the choice of control strategy, drive motor, such as software modules design. Hardware circuit will be designed by Protel schematic and PCB documents; flow chart and flow chart of the module will been written.
 
Keywords: digital camera；control system；DSP