【摘要】：本文設(shè)計(jì)了一款基于ARM的氣密性自動(dòng)檢測(cè)設(shè)備，用于檢測(cè)壁掛爐燃燒室的氣密性。本系統(tǒng)基于GB25034-2010《燃?xì)獠膳療崴疇t國(guó)家標(biāo)準(zhǔn)》的規(guī)定并結(jié)合嵌入式技術(shù)，旨在實(shí)現(xiàn)氣密性檢測(cè)的自動(dòng)化。采用LPC2214作為核心控制處理器，，利用干式流量計(jì)、低量程壓力變送器等相關(guān)器件，實(shí)現(xiàn)對(duì)流量和壓力的精確測(cè)量。通過(guò)修正系數(shù)法，從外部Flash中獲得必要參數(shù)，測(cè)量計(jì)算出被測(cè)器具的氣體泄漏量，并自動(dòng)與國(guó)標(biāo)規(guī)定參數(shù)進(jìn)行比較，給出被測(cè)器具是否合格的判斷。 本文介紹了嵌入式系統(tǒng)的定義、設(shè)計(jì)方法，根據(jù)實(shí)際需要選擇了適當(dāng)?shù)挠布脚_(tái)和軟件平臺(tái)。對(duì)以LPC2214為核心控制器的硬件平臺(tái)的和以μC/OS-II為軟件的平臺(tái)行了深入的研究，并對(duì)系統(tǒng)的整體框架進(jìn)行了規(guī)劃和具體模塊的詳細(xì)設(shè)計(jì)。在硬件方面，本文研究和設(shè)計(jì)LPC2214的外圍電路、流量脈沖采集電路、壓力采集電路、電磁閥驅(qū)動(dòng)電路、人機(jī)接口電路和電源等重要電路，針對(duì)硬件的抗干擾措施進(jìn)行了分析；在軟件方面，本文研究和實(shí)現(xiàn)了嵌入式實(shí)時(shí)操作系統(tǒng)μC/OS-II在LPC2214上的移植，并基于μC/OS-II編寫了數(shù)據(jù)采集、鍵盤掃描、LCD顯示等任務(wù)，以及基于軟件的數(shù)字濾波和看門狗設(shè)計(jì)，并在ADS1.2集成開發(fā)環(huán)境下調(diào)試通過(guò)。 實(shí)驗(yàn)結(jié)果表明，本文設(shè)計(jì)的測(cè)試系統(tǒng)滿足流量、壓力的測(cè)量精度要求，對(duì)產(chǎn)品合格性的判斷具有較高可信度。
[Abstract]:In this paper, an automatic air tightness detecting device based on ARM is designed, which is used to detect the gas tightness of combustion chamber of wall hanging furnace. This system is based on the national standard of GB25034-2010 and embedded technology to realize the automation of gas tightness detection. Using LPC2214 as the core control processor and using dry Flowmeter, low range pressure transmitter and other related devices, the accurate measurement of flow and pressure can be realized. By modifying coefficient method, the necessary parameters are obtained from the external Flash, the gas leakage of the instrument is measured and calculated, and the parameters are compared automatically with the specified parameters of the national standard, and the judgement of whether the instrument is qualified or not is given. This paper introduces the definition and design method of embedded system, and selects appropriate hardware platform and software platform according to the actual needs. The hardware platform with LPC2214 as the core controller and the platform with 渭 C/OS-II as the software are deeply studied, and the overall framework of the system is planned and the specific module is designed in detail. In the aspect of hardware, this paper studies and designs the peripheral circuit of LPC2214, flow pulse acquisition circuit, pressure acquisition circuit, solenoid valve driving circuit, man-machine interface circuit and power supply, and analyzes the anti-interference measures of the hardware. In the aspect of software, the porting of embedded real-time operating system 渭 C/OS-II on LPC2214 is studied and realized, and the tasks of data acquisition, keyboard scanning, LCD display and so on are programmed based on 渭 C/OS-II. And digital filtering and watchdog design based on software, and debugging in ADS1.2 integrated development environment. The experimental results show that the test system designed in this paper can meet the requirement of measuring accuracy of flow and pressure, and has a high reliability in judging the quality of the product.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP274;TP368.12

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