Keyboard keys accelerated keys back, the front control around key ups and downs of the space bar to a u-turn 鍵盤上鍵加速,下鍵后退,左右鍵控制車頭起落,空格鍵調(diào)頭。
After the introduction of the selected elements, the thesis gives out a design which includes a front control center based on siemens s7300 plc 、 a line connection of the master profibus and the distributed intelligent i / o et200m system 、 a real-time display system of pressure sensors and a gas supply system with stop valve and electric actuator 本文在介紹了所選擇器件情況基礎(chǔ)上,設(shè)計了基于siemenss7300plc為前端控制中心,利用profibus總線接分布式智能i/oet200m系統(tǒng),壓力傳感器現(xiàn)場顯示,截止閥加電動執(zhí)行器實現(xiàn)配氣的方案。
The monitoring system adopts embedded web server technology to send warning information and on-the-spot picture to the remote monitoring center . the wired or wireless remote transmission channel ( ethernet or gprs ) can be adopted between the center and the front control point, and has the features of mutual supplement, convenience and flexibility 監(jiān)控系統(tǒng)采用嵌入式web服務(wù)器技術(shù)將報警信息及現(xiàn)場圖像發(fā)送至遠程監(jiān)控中心;中心與前端監(jiān)控點間可以采用有線(以太網(wǎng))或無線(gprs)的遠程傳輸信道,這兩種傳輸方式具有互相彌補、方便靈活的特點。
After describing channel coding and modulation system based on cofdm transmission scheme, we study the methods of circuit design in all blocks, including front control, randomization, reed-solomon code, outer interleaving, inner interleaving, mapping and frame shaping 本文詳細闡述了cofdm系統(tǒng)的信道編碼和調(diào)制部分的組成方案,并重點研究了發(fā)射端信道編碼和調(diào)制電路以及幀形成電路的設(shè)計,具體包括前端控制、加擾、rs編碼、外交織、卷積編碼、內(nèi)交織、映射和ofdm幀形成等模塊。