基于物联网的无线安防系统硬件设计本科生毕业（设计）论文.doc

基于物联网的无线安防系统硬件设计 摘要：文中所设计安防系统硬件部分以我校自主研发的ARM嵌入式系统用户板——LPC1768Ⅲ型用户板为开发平台，外部配有LCM12864显示屏、LED显示模块，按键及各种通讯接口等；辅助设计了一款基于ARM Cortex-M0微控制器LPC11C14设计的前端信息采集器，用于配合主控平台传送、处理各种传感器接收到的信号。外部配有按键、LED指示灯、ADC与DAC模块、无线通信模块、串行通信模块等。 LPC1768Ⅲ用户板开发平台主要应用了ARM的网络通信模块、液晶显示模块及外部接口模块。网络通信模块用于与计算机的通信或者是利用局域网组建安防网络，液晶显示模块用于显示当前系统信息和使用虚拟键盘控制安防系统，而外部接口模块则是连接无线通信模块接收前端信息采集器传入的数据。 辅助设计的前端信息采集器的串行通信模块用于远距离的通信、ADC与DAC模块用于挂接各种传感器完成信息采集功能，无线通信模块用于在近距离通信范围内与主控平台的数据通信，按键、LED指示灯则是对信息采集器的功能升级，配合相应的软体程式信息采集器可以实现更多人性化的功能。 本文对所用芯片的工作特性、无线通信模块的工作原理、电路设计注意事项等进行了详细的描述。实验测试结果表明，该无线安防系统能正常工作，适用于家用安防、中小企业安防等中小型安防领域。 关键词：ARM嵌入式；无线通信；安防系统；硬件设计 Wireless security systems, hardware design Based on the Internet of Things Abstract: In this paper, the hardware portion of the security system design independent research and development of the school board of ARM embedded system user - LPC1768Ⅲ type board as a development platform, external with have LCM12864 display, LED display module, buttons, and a variety of communication interfaces; aided design of a front-end based on the ARM Cortex-M0 microcontroller LPC11C14 information collection, used in conjunction with the master platform transmission, processing the received signals of various sensors, external with buttons, LED indicators, ADC and DAC module, the wireless communication module serial communication modules. LPC1768Ⅲ user board development platform for applications ARM network communication module, LCD module and an external interface module. Network communication module for communication with the computer or LAN set up a security network, the LCD module is used to display system information and use the virtual keyboard to control security systems, and external interface module is connected to the wireless communication module to receive front-end information acquisition incoming of data. Aided design front-end acquisition of the serial communication module for long-distance communication, ADC and DAC modules are used to mount a variety of sensors to complete