DSP水温自动控制系统的设计

范文编号:ZD1179   范文字数:20946,页数:59  附原理图，外文翻译

 摘     要

 主要介绍了一种基于的DSP水温自动控制系统的设计原理，描述了系统组成的各个模块和硬件和软件的实现。该系统通过对水温的采样，与预置值的比较，来控制水温。
 本系统采用十六位DSP（数字信号处理器）TMS320F240为主控制器，它具有运算速度快，信号实时处理的优点。另外，它片内扩展外设，简化了硬件电路图的设计，由于它面向数字控制系统，使得能够运行复杂控制算法。
 在温度采集方面，采用DS1820作为传感器实施数据采集。采用温度传感器DS1820具有较高精度和重复性（重复性优于0.1ºC）良好的线性可以保证±0.1ºC的测量精度，利用重复性较好的特点，通过非线性补偿，可以达到±0.4ºC测量精度和±0.4ºC保温精度。
 控制算法采用PID算法，可以使系统具有较好的快速性和较小的超调。
 由于本系统对DSP、DS1820以及PID算法的应用，较好的满足了设计要求，实现了所要求的各项功能。
 
 
 关键词：温度控制   TMS320F240  PID算法
 
  
 
 Design of Water Temperature Auto Control System Based on DSP

 
Abstract
 In the aspects of this text introduced the design principle of the automatic control in water temperature in canteen in electricity system primarily. Describes the hardware and software modules were provided. That system passes to adopt the data from the electricity canteen water temperature, and compares with the refer input to control the water temperature.
 This system adopts 16 bits DSP (Digital signal processor) TMS320F240 as the main device .It has the advantages of calculating speed quickly and processing signal in real time. And it has a lot of outside devices in it. This simplifies the design of the hardware circuit. Because it face to the arithmetic figure control system, it can circulate the complex control system.
 DS1820 is used as the conductor of this system. It has higher accuracy and  good linearity characteristic in repetition( repetition better than 0.1℃) in ± 0.1 ℃ of diagraph accuracy. It can attain the ± 0.4 ℃ measure accuracy  .
 The control arithmetic adopts the PID. It can make system had better of faster and smaller super adjust.
 Because this system adopts DSP, DS1820 and the arithmetic of PID, it contents the design requests better.

Key Words:  Temperature Control    TMS320F240    PID Algorithm

目     录

第一章 绪论 1
1.1 课题的目的及意义 1
1.2 功能说明 1
第二章 方案论证 2
第三章 硬件部分设计 3
 3.1主控制器的设计 3
 3.2 DSP的片上外设 11
 3.3 前向通道的设计 15
 3.4 后向通道的设计 17
 3.5 键盘与显示电路 20
 3.5.1 引脚说明与接口电路 20
 3.5.2 HD7279A主要特点及电特性 21
 3.5.3 控制指令及时序 22
 3.5.4 LED数码管 26
 3.5.5 键盘 29
第四章软件部分设计 30
 4.1 PID控制算法[1] 32
 4.2 流程图 33
结束语 36
参考文献 37
附录 38

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