西南科技大学本科生毕业论文 I无线传输报警系统的设计摘要：本设计采纳了德州 TI 公司的 16 位单片机 MSP430F449、NORDIC 公司的NRF24LO1、红外热释电传感器 LHI778，设计完成了无线传输报警系统。设计中重点探讨了红外热释电感应器对人体信号的检测、信号的处理、MSP430F449 的中断方式和低功耗模式 nRF24L01 的射频通信原理；介绍了在 IAR 开发平台下采纳 C语言编程实现 MSP430F449 的信号控制。经过滤波、放大、有限电压比较等处理将红外热释电传感器输出的微弱信号转换为单片机能识别的数字信号。MSP430 单片机将传感器采集到的盗情信号传送给射频收发模块 nRF24L01，通过无线方式发送到 AT89S51 单片机控制的 nRF24L01 接收模块，再通过串口将接收到的信息传输到上位机；上位机不仅可以显示检测到的信息，也可以将信息以文本形式保存便于日后查询。关键字：无线传输；红外传感器；MSP430F449； nRF24L01下载后可任意编辑The Design of Wireless Transmission Alarm SystemAbstract: This design used 16-bit single chip MSP430F449 which is from Texas TI Company, nRF24L01 of NORDIC Company, and infrared ray sensor LHI778. This paper accomplished the wireless transmission alarm system. The important contain of this design is the discussion of human body’s signal dictation, signal processing, interrupt model of MSP430F449 and the radio frequency communication theory of nRF24L01with low power consumption mode. Use C programming language to control the signal of MSP430F449 under IAR platform. Firstly, the infrared ray sensors will output a faint voltage signal which is filtered, magnified and compared and so on. At the same time, the digital signal which was managed by MSP430 chip will be transmitted nRF24L01, the nRF24L01 connect with the MSP430. Secondly, another nRF24L01 which was fixed on AT89S51 received the signal from the modular of nRF24L01; the AT89S51 chip sounds an alarm. Finally, the signal which is from AT89S51 was transmitted PC. The PC will not...
