基于FPGA的平台温度读取方式参考.doc

摘 要 基于微处理器的数字PID控制器改变了传统模拟PID控制器参数不够灵活的问题，但是常规微处理器容易在环境恶劣的情况下出现程序跑飞的问题。现在使用的温度控制系统一般都是基于单片机平台的，它具有分立元件多、功耗大、速度慢等缺点，我们必须设计出更好的检测装置来解决这些问题。本课题的目的就是研究开发一种速度快、精度高、性能可靠的数字温度控制设备，用来监视及控制自动系统。 通过对各种硬件平台进行深入的对比，发现采用FPGA为核心进行设计，可以从本质上解决以上问题。FPGA即现场可编程门阵列，可供使用者现场定义它的功能，具有结构灵活、速度快、集成度高以及适用范围广等特点，兼容了PLD和通用门阵列的优点，可实现较大规模的电路，编程也很灵活。它可以使用QUARTUSⅡ软件设计，并运用Verilog HDL语言编译，把FPGA与数字式温度传感器有机地结合起来，再通过PID反馈形成闭环控制系统，这样就建成了一个FPGA温度控制系统，这个系统可以弥补单片机系统的不足，适应未来社会的要求。 关键词： FPGA；PID反馈；温度控制 Abstract The PID controller based on microprocessor solved the problem that the parameters can’t be changed flexibly in traditional analog PID controller, But the general microprocessor has a limit of blind running when placed in atrocious condition. Temperature control system that has been used nowadays currently based on singlechip, its disadvantage is obvious: to much discrete component, high power consumption, slow speed etc. We need to design a better new device to solve these problems. The purpose of this treatise is to develop a kind of numerical temperature control device with a faster, more accurate, highly dependable which is used to monitor and control the automatic system. By comparison of different hardware platforms fine out that it can solve the above problems in essence by using FPGA as the core to design. FPGA is a semiconductor device components can be edited, and its function can be defined by a on-site user. FPGA has a lot of advantages such as flexible structure, speed, high integration, and wide range, besides, Large-scale circuits can be realized with the compatibility of PLD and universal gate array and the programming is also very flexible. It can use QUARTUSⅡand Verilog HDL to combine the FPGA and digitize temperature sensor, and then through PID feedback the closed loop control system can be formed.At last a FPGA temperature control system is built, it make up for deficiency of singlechip system and meet the requirements of the future society. Key words: FPGA ; PID feedback ;