bus request 中文意思是什麼
bus request
解釋
總線請求-
At the same time, it also illustrates the superiority of this kind of communication by introducing the profibus field bus. take the transformation of focke packaging machine as an example, the main content is as follows : 1st, to analyze the plc control system of s5 series, and determine the concrete functions that the new plc control system hopes to achieve as well as how to achieve the goal through studying the work program of the original one ; 2nd, to demonstrate the advantage of the field bus in the process of digital alternation by introducing the principle agreement of field bus profibus ; 3rd, to achieve each function of the original control system through using siemens ' s plc control system in the design of hardware and step 7 in the software as well as designing and compiling control system of focke packaging machine ; 4th, to use fm455 for controlling temperature not only can meet the system ’ s severe request for temperature and efficiently avoid many demerits of the temperature control instrument but also can bring convenience for operation and maintenance ; 5th, to use the intouch configuration software to compile monitor and control program can accomplish the goal for real - time surveillance and control of the production line, while setting some parameters can provide a powerful alarming function
以改造focke包裝機為例，主要內容如下: 1 、通過熟悉原有控制系統的工作流程，分析了原s5系列可編程邏輯控制器的控制系統，確定新的可編程邏輯控制器控制系統需要實現的具體功能以及其實現方法; 2 、在本系統數據交互中，通過介紹profibus現場總線原理協議，論述了現場總線在工業通訊中的優點; 3 、下位機硬體設計上使用西門子可編程邏輯控制器控制系統，軟體平臺採用西門子step7 ，設計和編制了focke包裝機控制軟體，實現了原有控制系統的各項功能; 4 、本系統對溫度要求嚴格，採用溫控儀表控制溫度不能滿足系統要求，而且溫控儀表操作和維護都不方便，因此採用fm455溫度控制模塊進行溫度控制，滿足了系統對溫度的要求，同時又有效地避免了溫控儀表在操作和維護上的缺陷; 5 、在監控系統上，使用intouch組態軟體設計了系統的監控界面，從而實現了對生產線的實時監控，並且可以通過界面設置系統的一些參數，同時提供了較強大的報警功能。 -
If you want to get on a bus at a request bus stop, give a clear signal for it to stop
在某些車站，候車乘客須向行駛中的巴士發出清楚信號，巴士才會停下來，讓乘客上車。 -
Further investigated and analyzed composition structure and flow data that dsa ' s formation of image is systematic at first in this paper, carried on intact summing up to the data in the system, having given out the plan of design of high speed and large capacity data channel of digital formation of image system of x - ray ; deeper discussion of control way on sdram, give solution that many pieces of sdram works togetherses of realizing heavy capacity, designing of heavy capacity deposit board realize storing at a high speed to vision data by frame on the basis of this ; through further investigations of interface of pci bus, optimize back end state machine design and urge procedure making with lower, giving intact pci interface scheme that realize high speed dma data transmission and satisfy request of video transmitting ; further investigate the figure systematic design method of programmable logic devices, due to the difficult point of drifting about of enabled signal in fifo in common use and setting up and keeping of output signal, method has been proposed of improving stability of system making use of signal utilizing the phase locking ring in fpga to offer a lot of clocks to move thus realize coordinating the data between every module of system to transmit at a high speed by making use of fifo
本文首先對數字減影血管造影（ dsa ）成像系統的組成結構和數據流向進行了深入研究和分析，並對系統中的數據流向進行了完整的歸納和總結，給出了x線數字成像系統中的高速大容量數據通道的設計方案；在對sdram的控制方式做了深入探討后，給出了實現大容量多條sdram共同工作的解決方案，在此基礎上設計了大容量幀存板實現對圖象數據進行高速存儲；通過對pci總線介面的深入研究，優化後端狀態機設計和低層驅動程序開發，給出了完整的pci介面方案實現高速dma數據傳輸，完全可以滿足視頻傳輸要求；深入研究了基於大規模可編程器件的數字系統設計方法，針對通用fifo使能信號漂移、輸出數據難于建立和保持等設計難點，提出了利用fpga中的鎖相環提供多個時鐘相移的信號來提高系統穩定性的解決方案，從而實現利用fifo來協調系統各模塊之間的數據高速傳輸。 -
According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system
針對研製任務的要求，課題期間研製了下位機系統硬體和軟體，開發了上位機監控軟體，其中所作的具體工作包括：測量原理的研究和在系統中的實現，在本次設計中用三種方法來進行水位測量，分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法；主控晶元的選擇，我們選用了高集成度的混合信號系統級晶元c8051f021 ；實現了信號的採集和處理，包括信號的轉換和在單片機內的運算；高集成度16位模數轉換晶元ad7705在系統中的應用，我們完成了它與單片機的介面設計及程序編制任務；精確時鐘晶元ds1302在系統中的應用，在此，我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬，該晶元的應用給整臺儀器提供了時間基準，方便了儀器的使用；另外，針對研製任務的要求，還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測，該部分的實現是通過採用ad421晶元來完成的，本設計中完成了ad421與單片機的spi介面任務，協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系，並完成了程序設計；與上位機的通信介面設計，該部分通過兩種方法實現： rs232通信方式和rs485通信方式；系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。 -
The tramsission rate exceed to the range of isa bus, moreovcr the pci bus can be competent for the rate request. the card makes use of the total line in pcicontroller, the slice of fifo, fpga and super - speed a data correspondence chip, which can solve the transmission stream and total line in pci connecting problem. and realizes the mpeg - 2 deliver to flow with establish outside delivers
此速率超過了isa總線所能支持的傳送速率，而pci總線能夠勝任這一要求，由此確定節目傳輸流發送卡採用pci總線。此卡利用pci總線控制器、 fifo晶元、 fpga晶元、高速串列數據通信發送晶元，解決傳輸流與pci總線之間的介面問題，實現了mpeg - 2傳輸流與外設的高速數據傳輸。 -
Figure 2 - 8. the flow of a read request for a device on a secondary bus
圖2 - 8 。在一個二級總線上對於一個設備的讀請求的流程。 -
Under the background of the strapdown integrated navigation system ( sins ), designs some sins with arinc 429 interface, analyzes the communication protocol, and in the guarantee of the system precision and the real - time request, accomplishes the modularized software of the arinc429 interface subsystem, and gives long time debugging and testing results to the sins system. this paper designs the airborne integrated navigation system based on the 1553b bus, completes the bus information flow design, and carries on thorough analysis on the communication protocol of the 1553b bus
本文結合捷聯組合導航系統的應用背景，設計了含有arinc429總線介面的某型捷聯慣導系統，分析了其中的arinc429總線協議，並在保證系統精度和實時性的要求下，完成了該捷聯組合導航系統中arinc429介面系統的模塊化軟體設計，並給出對系統長時間聯調測試的分析結果。 -
The mine monitoring system is main applied to coal mine exploitation process under mine, it is applied to danger environment that containing firedamp and smut blast under coal mine, it belongs industry automation system that adopting essence - safe design, general - utility type, high performance and high reliability. pcm - 3350 main board and pcm - 3612 main board of pc104 bus are used as hardware platform and windowsce. net of microsoft is used as operating system. the transport strap control automation system is developed according to practical request by using mcgs industrial configuration software
我們開發的這種礦山監測系統是一種適用於煤礦井下有甲烷和煤塵爆炸危險環境中的，採用本安設計的，通用型、高性能、高可靠性的工業自動化系統，它採用pc104總線的pcm - 3350 、 pcm - 3612主板作為硬體平臺，微軟的windowsce . net作為操作系統，而運輸皮帶控制自動化系統是利用mcgs工業組態軟體根據實際要求開發出來的。 -
For super - speed data sampling rate, design the dma bus of telecommunication method. aiming at the hardware system oneself request of security and stabilization, design the reset module, the power monitoring module, the serial eeprom module
為了保證具有高速的數據采樣率，設計了dma總線的通訊方式。針對硬體系統自身安全性和穩定的要求，設計了復位模塊、電源監控模塊、串列eeprom模塊。 -
Provide long - term renting service according to the client ' s request ; purchase new car for the clients ' demand ; provide long - term and short - term renting service ; provide regular bus service, conference vehicles, picking up and sending off service and so on ; provide comprehensive service for your itinerary
根據客戶指定車型長期包租，本公司可購置新車為客戶服務；提供長期、短期租車；班車；會議用車；機場接送等服務，並為您的行程提供全面服務。 -
If you use the service integration bus, you can use inbound services to expose destinations as web services and have mediations service the request
如果使用服務集成總線，則可以使用入站服務（ inbound service ）將目標公開為web服務，並使用中介（ mediations ）進行請求。 -
At present, because the characteristics and special application occasions of remote monitoring system, no communication bus or system can totally satisfy the actual request that long distance multi - point monitoring and controlling system
由於遠程監控系統的特點和特殊的應用場合，目前尚沒有一種通訊總線或應用系統能完全滿足長距離多點監控的實際要求。
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