基于圖像識別的精密露點儀硬件設計

電子機電論文編號:JD1030  論文字數:12681,頁數:35，有開題報告，任務書，原理圖

目  錄

前  言 1
第1章 露點儀的原理 4
 1.1 露點濕度儀Regnault原理 4
 1.2 露點儀傳感器結構 5
第2章 露點儀系統的硬件設計 7
 2.1露點儀系統硬件結構概述 7
 2.2 DSP的選型及介紹 8
 2.2.1 TMS320C62x的特點 8
 2.2.2 CPU結構 9
 2.2.3片內存儲器 12
 2.2.4 外部存儲器借口 13
 2.2.5直接存儲器訪問 14
 2.3 C6201 DSP外圍電路設計 15
 2.4外擴SRAM及FLASH 16
 2.5視頻信號采集接口電路設計 18
 2.5.2視頻采集接口電路設計 20
 2.5.3同步信號輸出時序圖 20
 2.6基于CPLD的數字邏輯電路設計 22
 2.6.1 EPM7128AETC100-10 22
 2.6.2圖像采集控制功能的數字邏輯電路設計 23
 2.7電源和復位 24
 2.7.1電源 24
 2.7.2復位 25
 2.8總線隔離 26
 結論 29
參考文獻 30
致　謝 32

摘 要

 精密露點儀是工業生產和實驗室中一種重要的濕度測量儀表。目前露點儀的檢露方法普遍采用光電檢測的方法，但是這種方法不能識別鏡面上的凝聚相是露點還是霜點，從而引起較大的測量誤差。在本設計中，我們采用圖像識別技術來解決這個問題。
 為了采集露點和霜點圖像進行圖像識別的系統設計，首先要完成露點儀中露霜檢測系統硬件設計。本文對此進行了詳細地論述。露霜檢測系統硬件在功能上可分為兩部分：第一部分由ADV7183解碼芯片、EPM7128A型CPLD和CY7C1021 SRAM等器件組成，實現視頻圖像信號的采集；第二部分由TMS320C6201DSP、CY7C1041 SRAM和SST39VF400A FLASH等器件組成，實現圖像處理和識別。
 DSP是本系統的核心器件。TMS320C6000是TI公司面向圖像處理和通信領域應用推出的新一代產品，用TMS320C6201作實時圖像處理，可以提高系統的實時性、實現更加復雜的算法、降低系統的體積和功耗。
 
關鍵詞：圖像識別，DSP，CPLD，露點儀，視頻圖像信號

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