Omron G32A-A10-VD 圖像采集技術隨著科技的不斷進步在全球的應用已越來越廣泛，如工業、醫療、電子等各領域。在國內，各行各業對采用圖像采集技術的工業自動化、智能化需求也廣泛出現，逐步開始了工業現場的應用，比如，制藥行業的藥品檢測分裝、印刷業的印刷色彩檢測、PCB板的表面質量檢測、LCD屏的質量檢測等。所以，以圖像采集功能為核心，開發一款適合工業領域應用且功能齊全、操作方便的圖像采集系統會給用戶帶來很大的實惠。
目前圖像采集方面已有很多且很完善的方案，本文設計選擇了利用FPGA進行圖像采集的方案，設計了一套圖像采集系統。與普通應用于工業方面的圖像采集系統不同，本系統添加了存儲功能，并對傳統的控制操作的方式進行了改進。
1 系統總體設計
系統總體設計如下：圖像通過VGA接口用顯示器顯示，顯示速率可達25 f／s；系統可以將在顯示器上看到的當前圖像以位圖的格式存儲到優盤或其他USB設備中，并可以對存儲的圖像進行回顯；用遙控器代替了按鍵的控制方式，可以在幾米范圍內用遙控器調節曝光、增益、十字線、存圖和讀圖等所有功能，操作靈活方便。系統用美光公司的130萬像素MT9T001作為圖像傳感器；Altera公司的FPGA芯片EP2C8Q208來完成圖像采集和顯示功能的控制，在實時瀏覽圖像時，它從MT9T001中采集出Bayer陣列的黑白圖像數據，然后將采集的數據用插值算法轉換成24位RGB數據，由于采集圖像的速度為40 MHz，而VGA顯示的速度只有25 MHz，所以FPGA將轉換完的數據放到SDRAM中緩存一下再送給驅動VGA顯示的ADV7125芯片；ADV7125為ADI公司的高速數模轉換芯片，將數字真彩色圖像數據轉換成可以用VGA接口傳輸的模擬視頻信號；用Atmel公司的ATmega 8L芯片來完成遙控器的解碼、讀寫USB設備的控制以及位圖格式的創建等；用集成了文件系統的FTDI的VNC1L-1A芯片作為與USB設備通信的接口芯片，單片機加一片接口芯片完成USB的Host功能，省去了對文件系統的處理，節約了軟件的開發時間。將這款帶存儲功能和遙控控制方式的圖像采集系統應用到了工業領域，做成產品，作為工業眾多工業相機中的一種。圖1是其總體設計框圖。
2 存儲模塊設計
目前存儲數據的方式有很多種，如硬盤、FLASH、光盤等，其中容易攜帶且使用方便的應是移動硬盤、優盤、SD卡，這幾種方式都可以通過USB口來傳輸數據（SD卡或CF等可借助相應的讀卡器再通過USB口傳輸數據），可見USB總線的應用已經很普遍，USB總線的即插即用、速度快、可以自供電等優點也的確是其他設備所不能比的。所以系統的存儲部分設計成USB設備，USB設備分為USB主（Host）設備和USB從（Device）設備，USB從設備只能被動地由主設備寫入或讀出數據，不符合本系統的要求。所以選擇了USBHost設備，只要將優盤等USB從設備插到系統的USB口上，就可以將當前要存儲的圖片存儲到U盤等存儲設備中。
USB Host設備的典型例子是PC機，這種Host功能是在操作系統下完成的，所以現在市面上可以移植操作系統的微控制器芯片大多都集成了USB Host功能，像三星和飛利浦的ARM芯片、君正公司開發的MIPS核芯片JZ4740等。這種采用帶操作系統的方案對有一定經驗的開發人員來說開發起來比較容易，但對生手來說需要一定的熟悉過程。只為了實現USB Host功能就選擇用操作系統的方式完成整個系統的控制是沒有必要的，這樣做不僅浪費資源，而且會增加底層驅動的開發時間。所以本設計選擇了比較簡單的方式，只用一片單片機和一個USB接口芯片來完成USB Host功能。這樣只要會用單片機的開發人員都可以做USBHost設備。市場上USB從設備的接口芯片有飛利浦的PDIUSBDl2和ISPl581等，但USB Host接口芯片則比較少。經試驗，最終確定VNClL-1A這款芯片作為USB Host控制器。
Omron G32A-A10-VD
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NEW AMAT APPLIED MATERIAL 200P-98001 ALIGNMENT TOOL
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TREBOR BOSS 700 ULTRA HIGH PURITY CHEMICAL PUMP
OMRON V530-R160E TWO DIMENSIONAL CODE READER
CLIMET CI-400-0-1-1 LASER PARTICLE COUNTER MICROPRO 400
TOKYO ELECTRON LIMITED P-12XL AQA-K09-TYP2 CHILLER
AEROFLEX FASTBIT TECHNOLOGIES FB100 BER TEST SYSTEM
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HONEYWELL CC-GAIX21 ANALOG INPUT IOTA 51306309-175
MELLES GRIOT 543-MA-A03 OMNICHROME ARGON-ION LASER
NEW FANUC A06B-0342-B231 AC SERVO MOTOR MODEL 5F
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Kulicke/Soffa Auto Wedge Bonder
OMRON V530-R150EP-3 2D CODE READER 24VDC 0.5A
PARKER COMPUMOTOR 4000-M MOTION CONTROLLER, 4 AXIS
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GALIL DMC-2120 MOTION CONTROLLER W/ ICM-2900 I/O MODULE
NEW INDUCTOHEAT 31035-500 CONTROL BOARD
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ALLEN BRADLEY 1785-L30B/A PLC5/30 PROCESSOR MODULE
ALLEN BRADLEY 1785-L30B/C PLC5/30 PROCESSOR MODULE
ENDRESS+HAUSER WEDGEWOOD AF44 OPTICAL SENSOR AND CABLE
METTLER TOLEDO RCPress 10 PRESSURE CONTROLLER
NEW BECKHOFF CONTROL PANEL MODEL CP7002 0001
GARDNER DENVER PUREAIR RECIPROCATING AIR COMPRESSOR
FLOTRONIC F SERIES 710 STYLE STAINLESS STEEL 1-NUT PUMP
NEW PARKER 08.00 JJ3H CTS155AC 2.000 HYDRAULIC CYLINDER
NEW BALDOR EM4110T 40HP,1775RPM,3PH,60HZ,324T,1260M,TEF
YIS INC YIS-150HD CONTROLLER FOR DISK INSPECTION
YIS INC YIS-150HD POWER SUPPLY FOR DISK INSPECTION
OSAKA VACUUM, COMPOUND MOLECULAR PUMP MODEL TG200 LL
NEW DAZOR SLM600-BK SCREENLENS VIDEO MAGNIFIER IV-PIVOT
PARTICLE MEASURING SYS AIR PARTICLE COUNTER LASAIR 310
LUXTRON 1015 DS ENDPOINT CONTROLLER FOR DRY ETCH 1015DS
NEW APPLIED MATERIALS 0242-10277 SMG SPARE PARTS KIT
NEW SIEMENS 3TF5622-0AK6 MOTOR STARTER CONTACTOR
ASYST TECHNOLOGIES SMIF-300FL 300mm INPUT OUTPUT SYSTEM
USTC LC10MC050 THERMAL TOOL PRE CHILLER SYSTEM
ALLEN BRADLEY 1785LT3A PROCESSOR MODULE PLC5/12
DIAMONEX INC DUAL STARTER POWER SUPPLY VOLT & AMMETER
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NEW ALLEN BRADLEY 2801-AM4 RACK FOR VISION PLATFORM
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NEW TECH MOTIVE 49-4100-01C5L TOOL CONTROL MODULE
NEW OMRON R88M-W90010T-BS2 AC SERVO MOTOR 1000 RPM
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