低成本数字高清小型摄像机的设计与实现

发布时间：2018-05-23 19:29

本文选题：数字摄像机 + 暗访　；参考：《中国科学院大学（工程管理与信息技术学院）》2014年硕士论文

【摘要】：暗访摄像机是在对方当事人不知情的情况下,对真实的事件现场进行记录,并将记录的音视频数据作为相关证据的一种摄像器材,广泛应用于私人侦探调查和新闻记者调查取证工作。目前出现的暗访摄像机大都是利用家用摄像机和专业摄像机改造而成,不利于隐蔽和操作,环境适用性差,成本普遍较高。研发一款体积小巧、操作方便、高清低照度并且成本较低的暗访摄像机来弥补现有暗访摄像机的缺陷成为众多用户的普遍需求。本文基于对上述小型暗访摄像机的市场需求分析,设计并实现了一款高清晰低照度的小型暗访摄像机,完成的主要工作包括： (1)分析了暗访摄像机的发展历史,并在分析对比主流的暗访摄像机设计方案的基础上,给出了本文所要设计摄像机的总体设计方案,包括硬件设计方案和软件设计方案。 (2)基于论文提出的硬件设计方案,给出了摄像机硬件系统的设计原理图,并对组成硬件系统的微控制器DM368、传感器和ISP电路、电源电路、DDR存储电路、NAND FLASH存储电路、TF卡存储电路和WIFI接口电路进行了详细的分析和设计。 (3)搭建了嵌入式软件开发平台,包括TI TMS320DM368平台的Linux端软件架构、Linux端驱动程序、Linux端IE控制部分、TCP Server控制部分、WiFi驱动程序设置,设计并实现了手机终端的Android应用程序和通讯控制协议。 (4)给出了摄像机的各个模块以及整机实物图,搭建了测试环境,通过实际应用验证了摄像机的各项功能。本文设计的暗访摄像机具有高清晰、低照度、成本低、易控制等优点,其视频分辨率可达：1080p@25f/s;照相分辨率可达：5百万像素；低照度效果可达0.1Lux；体积小于1.5cm×5cm,利于用香烟盒或背包进行伪装。持续录像时间可达1小时以上,并且可以通过基于安卓操作系统的手机进行无线操作控制。该摄像机方案应该具有良好的实用性、可靠性并且成本较低,利于市场推广。
[Abstract]:The undercover camera is a kind of camera device that records the real incident scene without the knowledge of the other party, and uses the recorded audio and video data as the relevant evidence. It is widely used in private detective investigation and journalist investigation. At present, most of the hidden visiting cameras are modified by using domestic cameras and professional cameras, which are not conducive to concealment and operation, poor environmental applicability, and generally high cost. The development of a compact, easy to operate, high-definition, low-illuminance and low cost secret access camera to make up for the shortcomings of the existing camera has become a common demand for many users. Based on the market demand analysis of the small camera, this paper designs and implements a small camera with high definition and low illuminance. The main work of this paper is as follows: 1) the development history of the camera is analyzed, and based on the analysis and comparison of the mainstream design scheme of the camera, the overall design scheme of the camera is given, including the hardware design and the software design. 2) based on the hardware design scheme proposed in this paper, the principle diagram of camera hardware system is given, and the DM368, sensor and ISP circuits, which constitute the hardware system, are analyzed. The power supply circuit is analyzed and designed in detail. The FLASH FLASH memory circuit, the TF card storage circuit and the WIFI interface circuit are analyzed and designed in detail. The embedded software development platform is built, including the Linux end software architecture of TI TMS320DM368 platform and the Linux end driver. The Android application program and communication control protocol of mobile terminal are designed and implemented. 4) each module of the camera and the physical diagram of the whole machine are given, the testing environment is built, and the functions of the camera are verified by practical application. The camera designed in this paper has the advantages of high definition, low illumination, low cost and easy to control. The video resolution of the camera can reach 10 80p @ 25f / s, and the resolution of camera can reach 5 megapixels. The effect of low illumination can reach 0.1Lux.The volume is less than 1.5cm 脳 5cm, which is suitable for camouflage with cigarette case or backpack. Video recording lasts more than an hour and can be wirelessly controlled via Android phones. The camera scheme should have good practicability, reliability and low cost.
【学位授予单位】：中国科学院大学（工程管理与信息技术学院）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN948.41

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