datum bus 中文意思是什麼
datum bus
解釋
數據母線-
With the use of new mcu p87c591, as the techiniques of serial communication and negative display of lcd, the dashboard has a very beautiful apearence and the system is simplified. not only the analogy signal and the pulse signal can be sampled into the instrument, but also the datum on the can - bus should be transferred into the system whit the connection to the in - vechile network. under the guindance of the idea of " informatic design ", the digital lcd dashboard system is developed, and the professional manufacturer of lcd display device is directed to develop and to design the special lcd module, by which the new lcd production is greatly optimized. all these intentions bing about a very well goal
在研製數字液晶儀表過程中，應用了新型單片機p87c591 、串口驅動技術和負顯技術，使該數字液晶組合儀表結構簡單，視覺美觀，既可以通過模擬通道、數字通道測量車輛傳感器的信號，又具備接入車輛總線、從can總線上獲得相關數據的能力。在項目開發過程中，運用「信息化設計」的觀點開展液晶顯示模塊的開發和設計工作；並根據軟體工程的原則，優化了液晶模塊的電路設計，使該項產品的開發取得了好的效果。 -
This thesis gives the design of an airborne datum communication board based on arinc429 bus, which is adopted dsp as controller, utilized bus interface chip hs - 3282 and use self - designed 429 electronic conversion circuit, then form a simple structure datum communication board with high dependability
該通訊板實現了pc並口（ epp ）與arinc429協議間的通訊，採用dsp控制，利用arinc429總線介面晶元hs - 3282和自行設計的電平轉換電路，構成了一款結構簡單、可靠性高的數據通訊板。 -
This paper ' s main task include : in the aspect of the network communication and database application, to satisfy the demands of the works, the software of sustaining dde is worked out, which realizes the dde with the configure software, so the problem that the instruments " protocols do not match to the configure software ' s is solved ; we work out the software of collecting datum information from the instruments on the rs - 485 bus ; the software of transferring information by the telephony network is worked out, and the software of alarm by beep - pager is work out too ; the software of database report with the performance of supporting com, by which the engineers can visit the field database everywhere in the world ; the software that the two servers are redundant mutually is developed ; some ladder program of plc is developed and the megabasic software is developed which collects datum information from the instruments on the rs - 485 bus
本論文研究工作主要包括： 1在網路通訊和數據庫方面，開發了支持dde通訊方式的軟體組件，實現和組態軟體cimplicity的dde通訊，基於rs _ 485總線的採集智能儀表數據的軟體組件，解決了設計院所提供的智能儀表和cimplicity在通訊協議方面不一致的問題；公用電話網數據傳送的軟體組件，和尋呼機報警的軟體組件；基於access數據庫列印報表的軟體組件和與internetexplore軟體兼容的數據報表，使用戶可以在任何地方，通過internet訪問現場數據庫的內容；上位機雙機冗餘的軟體組件；開發了plc控制器的部分梯形圖，利用plc的pcm模塊採集rs - 485儀表數據的megabasic軟體。 2 -
At first, the paper discusses the method of doppler parameter estimation based on raw datum, and analyzes the realization for range - doppler algorithm in real - time processing, motion compensation, datum subsection and geometry emendation. then, the corresponding system solution based on the algorithm is put forward. the versa module eurocard bus construction is adopted in the system design
本文首先討論了基於原始數據的多普勒參數的估計方法，並且分析了距離多普勒演算法在實時處理中的實現，以及實時成像下的運動補償、數據分段及幾何校正；然後在此演算法的基礎上提出了相應的系統解決方案，系統設計採用vme總線結構，其運算核心部分是一個由四片數字信號處理器組成的共享總線式并行處理模塊，論文並提供了整個實時成像演算法的軟體實現。
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