摄像机云台远程控制与视频监控应用研究

发布时间：2018-12-16 17:22

【摘要】：摄像机云台是视频监控系统中的重要组成部分,是集合了模拟视频信号采集、远程通信、云台运动控制、摄像头控制等功能的重要前端设备。本论文以STC15F2K60S2微控制器为核心,研发一款具有模拟视频采集显示和远程通信功能的云台控制系统。文章对系统设计过程中涉及的远程控制方法和云台精确定位及视频字符叠加显示等技术进行了重点研究和设计。系统的远程控制功能设计采用无线射频通信和RS485总线通信两种方式,文章解决了在设计远程控制功能过程中遇到的技术难点。并根据远程控制功能的技术要求,设计了RS485总线和无线通信模块的硬件功能电路。文章详细研究了步进电机运动的基本原理,并设计采用两个步进电机控制云台在水平和垂直方向上的运动功能。在基于步进电机的矢量值和电机电流波形之间的变化规律上,设计了两种控制步进电机运动的方法。文章对步进电机的细分控制及加/减速运动过程进行了详细研究,并建立了多种运动模型。运动控制系统最终设计采用专用细分驱动器控制水平方向的运动,并按照S型曲线算法进行脉冲激励。成功实现了步进电机加/减速运动的科学细分控制。系统设计了一种有效的方向检测电路,通过采用两个霍尔传感器及数字逻辑电路,可以巧妙地检测步进电机的运动方向和运动圈数,实现方向识别和运动计数。
[Abstract]:Camera head is an important part of video surveillance system. It is an important front-end equipment which integrates the functions of analog video signal acquisition, remote communication, motion control, camera control and so on. In this paper, STC15F2K60S2 microcontroller is used as the core to develop a cloud head control system with the functions of analog video capture, display and remote communication. This paper focuses on the research and design of remote control method, precise location of cloud head and video character superposition display technology in the process of system design. The remote control function of the system is designed by radio frequency communication and RS485 bus communication. This paper solves the technical difficulties encountered in the design of remote control function. According to the technical requirements of remote control function, the hardware functional circuit of RS485 bus and wireless communication module is designed. In this paper, the basic principle of stepping motor motion is studied in detail, and the motion function of cloud head in horizontal and vertical direction is designed with two step motors. Based on the variation of the vector value and the current waveform of the stepping motor, two methods to control the movement of the stepping motor are designed. In this paper, the subdivision control and acceleration / deceleration process of stepping motor are studied in detail, and various motion models are established. In the final design of the motion control system, a special subdivision driver is used to control the horizontal movement, and the pulse excitation is carried out according to the S-shape curve algorithm. The scientific subdivision control of step motor acceleration / deceleration motion is successfully realized. An effective direction detection circuit is designed. By using two Hall sensors and digital logic circuit, the moving direction and the number of moving cycles of the stepping motor can be detected skillfully, and the direction recognition and motion counting can be realized.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN948.41

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