基于图像识别的精密露点仪硬件设计

基于图像识别的精密露点仪硬件设计

文档编号:JD1030 文档字数:12681,页数:35，有开题报告，任务书，原理图

摘要

精密露点仪是工业生产和实验室中一种重要的湿度测量仪表。目前露点仪的检露方法普遍采用光电检测的方法，但是这种方法不能识别镜面上的凝聚相是露点还是霜点，从而引起较大的测量误差。在本设计中，我们采用图像识别技术来解决这个问题。
为了采集露点和霜点图像进行图像识别的系统设计，首先要完成露点仪中露霜检测系统硬件设计。本文对此进行了详细地论述。露霜检测系统硬件在功能上可分为两部分：第一部分由ADV7183解码芯片、EPM7128A型CPLD和CY7C1021 SRAM等器件组成，实现视频图像信号的采集；第二部分由TMS320C6201DSP、CY7C1041 SRAM和SST39VF400A FLASH等器件组成，实现图像处理和识别。
DSP是本系统的核心器件。TMS320C6000是TI公司面向图像处理和通信领域应用推出的新一代产品，用TMS320C6201作实时图像处理，可以提高系统的实时性、实现更加复杂的算法、降低系统的体积和功耗。

关键词：图像识别，DSP，CPLD，露点仪，视频图像信号

HARDWARE DESIGN OF PRECISION DEW-POINT HYGROMETER BASED ON IMAGE RECOGNITION TECHNOLOGY

ABSTRACT

The precision dew-point hygrometer is a kind of important humidity hygrometer. The photoelectric detection method is adopted generally in the dew-point hygrometer at present, but this kind of dew-point hygrometer cannot distinguish whether the condensation photograph on the mirror is dew point or frost point. So measure error must be incurred. In the thesis, we adopted image recognition technology to solve the problem.
Hardware system should be designed for dew-point and frost-point image acquisition before the study of the image recognition system. Hardware design are discussed in details. The hardware system is composed of two parts in function. The first part, which comprises an ADV7183 decoder chip, an EPM7128A CPLD chip and a CY7C1021 SRAM chip mostly, implements the acquisition of the video image signal. The second part, which includes a TMS320C6201 DSP chip, two CY7C1041 SRAM chips, and a SST39VF400A flash chip mostly, Processes the digital image signal.
DSP is the most important chip. TMS320C6000 is specially used in areas of image process and communication produced by TI. Using TMS320C62xx in real-time image processing is significant to improve the real-time quality of the system, reduce the volume and the power exhaustion of the system.

KEY WORDS: image recognition, DSP, CPLD, dew-point hygrometer, video image signal

前言 1
第1章露点仪的原理 4
1.1 露点湿度仪Regnault原理 4
1.2 露点仪传感器结构 5
第2章露点仪系统的硬件设计 7
2.1露点仪系统硬件结构概述 7
2.2 DSP的选型及介绍 8
2.2.1 TMS320C62x的特点 8
2.2.2 CPU结构 9
2.2.3片内存储器 12
2.2.4 外部存储器借口 13
2.2.5直接存储器访问 14
2.3 C6201 DSP外围电路设计 15
2.4外扩SRAM及FLASH 16
2.5视频信号采集接口电路设计 18
2.5.2视频采集接口电路设计 20
2.5.3同步信号输出时序图 20
2.6基于CPLD的数字逻辑电路设计 22
2.6.1 EPM7128AETC100-10 22
2.6.2图像采集控制功能的数字逻辑电路设计 23
2.7电源和复位 24
2.7.1电源 24
2.7.2复位 25
2.8总线隔离 26
结论 29
参考文献 30
致　谢 32

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