数字温度表设计研究.doc

 PAGE  摘要：本文主要研究利用FPGA器件和MAXPLUSⅡ工具软件设计数字温度表的问题，本文介绍了一种基于FPGA的数字温度表的设计，给出了仪表的硬件结构，详细介绍了用VHDL语言设计FPGA器件电路的方法。本课题在MAX+PLUSⅡ开发环境下，采用VHDL语言设计并实现了数字温度表。设计采用VHDL的结构描述风格，依据功能将系统分为三个模块，控制模块、数据处理模块和扫描显示模块，通过波形仿真、下载芯片的测试，完成了温度表的功能。由AD590与FPGA组成的测温系统的硬件电路和软件设计及提高测量精度的方法,通过对实际温度的测量,本设计具有结构简单、外围电路少、抗干扰能力强、功耗小、可靠性高、速度快、反应时间短等优点。 关键字：VHDL;FPGA;MAX+PLUSⅡ;数字温度表 Ⅱ Design and Emulation of the Digital Thermometer Abstract:This article main research the question using the FPGA components and the software tool MAXPLUSⅡ.design digit thermometers, this article introduced one kind design of digital thermometers based on the FPGA, has given the hardware architecture of measuring appliance’s, introduced the method using the language VHDL design circuit of FPGA component in detail. Under the development environment of MAX+PLUSⅡ this topic used the VHDL language design, and has realized the digital thermometer. The design take the structure description style of VHDL, based on the function the system consists of three modules, the control module, the data processing module and the scanning display module, via the profile simulation, the downloading chips test, has completed thermometers function. The temperature measurement systems hardware circuit which consist of AD590 and FPGA and the method that enhancement measuring accuracy, through the testing of the practical temperature, found this design has the merits simple structure, few outside-circuit, strong ability anti interrupter ,small power loss, high reliability, high speed, short time of reaction and so on. Key Words: VHDL; FPGA; MAX+PLUSⅡ; Digital thermometer 目 录  TOC \o 1-3 \h \z \u   HYPERLINK \l _Toc328321708 第1章 绪论  PAGEREF _Toc328321708 \h 1  HYPERLINK \l _Toc328321709 1.1 课题的研究意义  PAGEREF _Toc328321709 \h 1  HYPERLINK \l _Toc328321710 第2章 总体方案设计  PAGEREF _Toc328321710 \h 2  HYPERLINK \l _Toc328321711 2.1 方案原理的构思及比较  PAGEREF _Toc328321711 \h 2  HYPERLINK \l _Toc328321712 2.2 A/D转换器的合理选用  PAGER