本文關(guān)鍵詞： 測(cè)井技術(shù) 儀器總線 模擬方法 調(diào)度算法　出處：《電子科技大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著測(cè)井技術(shù)的快速發(fā)展,各種新型的測(cè)井儀器相繼誕生,井下儀器的組合功能越來(lái)越強(qiáng),測(cè)井?dāng)?shù)據(jù)量也越來(lái)越大,加之測(cè)井作業(yè)所處的惡劣環(huán)境,對(duì)研制可靠、穩(wěn)定、傳輸帶寬大、實(shí)時(shí)性好的測(cè)井?dāng)?shù)據(jù)傳輸系統(tǒng)提出了更高的要求。在測(cè)井系統(tǒng)的研制過(guò)程中,通常需要掛接井下儀器才能對(duì)地面系統(tǒng)和遙傳系統(tǒng)進(jìn)行檢測(cè)和調(diào)試。但是井下儀器原理各異,類(lèi)型眾多,掛接操作繁瑣,耗時(shí)耗力,效率極低。因此,迫切需要設(shè)計(jì)一套能夠模擬各種井下儀器的裝置用于測(cè)井系統(tǒng)的檢測(cè)及儀器設(shè)備調(diào)試。針對(duì)這一狀況,本文將嵌入式技術(shù)與網(wǎng)絡(luò)測(cè)井相結(jié)合,設(shè)計(jì)實(shí)現(xiàn)了一種以DSP F28335和FPGA為主要架構(gòu)的嵌入式井下模擬儀器,主要用來(lái)模擬各種井下儀器的功能,用于測(cè)試測(cè)井?dāng)?shù)據(jù)傳輸系統(tǒng)的性能,以及當(dāng)掛接新的井下儀器時(shí)可利用模擬儀器進(jìn)行前期的功能測(cè)試。本設(shè)計(jì)提出了一種基于時(shí)間-深度驅(qū)動(dòng)的數(shù)據(jù)采集方式,力圖盡可能真實(shí)地模擬測(cè)井曲線。此外,考慮到真實(shí)的測(cè)井儀器一旦被研制生產(chǎn)出來(lái),其接口,傳輸格式等就被固定下來(lái),本文選取了工業(yè)以太網(wǎng),CAN,RS-485這三種常用的測(cè)井?dāng)?shù)據(jù)傳輸總線,從而可以最大限度地模擬基于不同總線的測(cè)井儀器。本文詳細(xì)地闡述了井下模擬儀器的設(shè)計(jì)思路以及實(shí)現(xiàn)過(guò)程,包括解決方案的設(shè)計(jì),系統(tǒng)軟硬件實(shí)現(xiàn),測(cè)試平臺(tái)的搭建以及測(cè)試結(jié)果分析,主要工作如下:1、研究分析了井下模擬儀器的功能要求,討論并給出了基于F28335的井下模擬儀器的方案。2、利用OrCAD16.3和PADS2007等EDA工具,進(jìn)行原理圖設(shè)計(jì),PCB繪制,實(shí)現(xiàn)了井下模擬儀器的硬件平臺(tái)。本設(shè)計(jì)采用的芯片都是工業(yè)級(jí)高溫型號(hào),能夠在井下高溫環(huán)境下正常工作。3、完成了底層驅(qū)動(dòng)和應(yīng)用層代碼的編寫(xiě),包括SD驅(qū)動(dòng)和FATFS文件系統(tǒng)的移植,三種總線接口方案的實(shí)現(xiàn)。4、基于現(xiàn)有的一套測(cè)井?dāng)?shù)據(jù)傳輸系統(tǒng),完成了測(cè)試平臺(tái)的搭建,并進(jìn)行了相關(guān)的測(cè)試和調(diào)度算法的研究。本文所設(shè)計(jì)的井下模擬儀器,經(jīng)過(guò)現(xiàn)場(chǎng)測(cè)試,達(dá)到了預(yù)期要求,為模擬測(cè)井及測(cè)試提供了參考。
[Abstract]:With the rapid development of logging technology, a variety of new logging tools have been born, the combination of downhole tools more and more powerful, logging data is also increasing, in addition to logging operations in a bad environment. Higher requirements are put forward for the development of a reliable, stable, large transmission bandwidth and real-time logging data transmission system. Usually, it is necessary to test and debug the surface system and remote transmission system by hanging downhole instruments. However, there are many kinds of downhole instruments with different principles, complicated hanging operation, time-consuming and labor-consuming, and extremely low efficiency. There is an urgent need to design a set of equipment to simulate various downhole tools for logging system detection and instrument equipment debugging. In view of this situation, this paper combines embedded technology with network logging. An embedded downhole simulator based on DSP F28335 and FPGA is designed and implemented, which is mainly used to simulate the functions of various downhole instruments. It can be used to test the performance of logging data transmission system and to test the function of simulation instrument when it is connected with new downhole tools. This design presents a data acquisition method based on time-depth drive. In addition, considering that once a real logging tool is developed and produced, its interface and transmission format are fixed, the industrial Ethernet can is selected in this paper. RS-485, three commonly used logging data transmission buses, can simulate logging tools based on different buses to the maximum extent. This paper describes the design idea and implementation process of downhole simulation tools in detail. Including the solution design, system hardware and software implementation, test platform construction and test results analysis, the main work is as follows: 1, studied and analyzed the functional requirements of downhole simulator. This paper discusses and gives the scheme of downhole simulation instrument based on F28335. It makes use of EDA tools such as OrCAD16.3 and PADS2007 to draw the schematic design and PCB. The hardware platform of the downhole analog instrument is realized. The chips used in this design are all industrial high temperature models, which can work normally in the underground high temperature environment. The bottom driver and the application layer code are completed. Including SD driver and FATFS file system transplantation, the implementation of three bus interface solutions. 4, based on a set of logging data transmission system, completed the construction of the test platform. The downhole simulation instrument designed in this paper has achieved the expected requirements through field tests, which provides a reference for simulation logging and testing.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P631.83

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