描述
高速數(shù)據(jù)采集系統(tǒng)目前已在雷達(dá)、聲納、圖像處理、語音識(shí)別、通信、瞬態(tài)信號(hào)測(cè)試等領(lǐng)域得到廣泛應(yīng)用。它的關(guān)鍵技術(shù)是高速ADC技術(shù)、數(shù)據(jù)存儲(chǔ)與傳輸技術(shù)和抗干擾技術(shù)。當(dāng)大量的高速實(shí)時(shí)數(shù)據(jù)經(jīng)過模數(shù)轉(zhuǎn)換后,必須高速存儲(chǔ),多通道高采樣率的數(shù)據(jù)采集系統(tǒng)會(huì)產(chǎn)生巨大的數(shù)據(jù)流。這樣就需要高速大容量的存儲(chǔ)板將數(shù)據(jù)存儲(chǔ)起來,然后再讀回計(jì)算機(jī)進(jìn)行處理。基于以上原因,本文設(shè)計(jì)了可以同時(shí)存儲(chǔ)兩通道采樣數(shù)據(jù)的大容量存儲(chǔ)板,板中采用了64片Samsung公司的高速大容量存儲(chǔ)器K9F2G08UOM,使整塊板卡的存儲(chǔ)容量達(dá)到128Gbit。采用FPGA作為控制器,通過標(biāo)準(zhǔn)的CPCI工控機(jī)箱操作存儲(chǔ)板,并通過CPCI總線將存儲(chǔ)板上的數(shù)據(jù)高速讀回計(jì)算機(jī),提高了讀取數(shù)據(jù)的速度。
2K9F2G08UOM簡(jiǎn)介
NORF
lash和NANDFlash是目前市場(chǎng)上的兩種主要的非易失性閃存技術(shù),本設(shè)計(jì)的目的是為了高速存儲(chǔ)大容量的數(shù)據(jù),因此,選擇NAND型K9F2G08U0M存儲(chǔ)器。它的存儲(chǔ)容量是2Gbit,8位位寬,頁(yè)大小為2048×8bit,每塊由64頁(yè)組成,共有2048塊。每頁(yè)帶有64×8bit的空閑存儲(chǔ)區(qū),共有8192K×8bit的空閑存儲(chǔ)區(qū)。頁(yè)編程的典型時(shí)間為300μs,最大頁(yè)編程時(shí)間為700μ8。頁(yè)內(nèi)連續(xù)最小訪問時(shí)間為30ns/Byte,即數(shù)據(jù)寫入Flash數(shù)據(jù)寄存器的速度可達(dá)33MB/s。但是單頁(yè)數(shù)據(jù)的典型編程速度為2048/300μs=6.8MB/s,最慢的編程速度為2048/700μs=2.9MB/s。塊擦除的典型時(shí)間為2ms。K9F2G08U0M具有硬件數(shù)據(jù)保護(hù)功能,即在電源上電、掉電期間關(guān)閉編程/擦除操作。K9F2G08U0M內(nèi)部寫控制器使得所有的編程和擦除操作自動(dòng)進(jìn)行,片內(nèi)包含一個(gè)頁(yè)(2048+64字節(jié))的數(shù)據(jù)寄存器,讀寫過程中始終是將存儲(chǔ)單元數(shù)據(jù)或外部數(shù)據(jù)先緩存到數(shù)據(jù)寄存器,然后再讀出數(shù)據(jù)或?qū)懭氪鎯?chǔ)單元。因此,它是基于頁(yè)讀寫,基于塊擦除的。當(dāng)然,它也支持隨機(jī)讀寫。但本設(shè)計(jì)目的是高速存儲(chǔ)數(shù)據(jù),因此對(duì)它的讀寫操作完全是基于頁(yè)的。K9F2G08U0M的主要引腳有CLE(命令鎖存允許)、ALE(地址鎖存允許)、CE(片選)、WE(寫允許)、RE(讀允許)、WP(寫保護(hù))、R/B(準(zhǔn)備好/忙)、PRE(上電讀使能)、I/O0~I(xiàn)/O7(輸入,輸出)。其中I/O0~I(xiàn)/O7既可作為數(shù)據(jù)輸入輸出引腳,又可作為命令地址的輸入引腳,命令、地址、數(shù)據(jù)分時(shí)復(fù)用,根據(jù)不同的命令區(qū)分地址和數(shù)據(jù)。一般的操作流程為:
歐美品牌停產(chǎn)的,常用的“PLC”備品備件
我司產(chǎn)品應(yīng)用于以下領(lǐng)域:
1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》
2,《智能平鋼化爐系統(tǒng)制造》
3,《PLC可編程輸送控制系統(tǒng)》
4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》
6,《化工廠藥液恒流量計(jì)算機(jī)控制系統(tǒng)》
7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動(dòng)化控制系列
本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。
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