【摘要】：鍋爐在生產(chǎn)活動中占有重要地位,同時鍋爐產(chǎn)品中又存在大量的焊接結(jié)構(gòu),其焊接質(zhì)量是否過關(guān)直接關(guān)系到鍋爐能否安全運行。對鍋爐焊接前預(yù)先加熱待焊接結(jié)構(gòu)部件的溫度達到工藝要求是保證鍋爐產(chǎn)品質(zhì)量的重要方面。因而,如何經(jīng)濟、高效、準確地測量鍋爐焊接過程中的預(yù)熱溫度并保證其在工藝要求范圍內(nèi)是保障鍋爐產(chǎn)品質(zhì)量的基礎(chǔ)。本文結(jié)合該測溫系統(tǒng)的實際應(yīng)用背景,分析提出以非接觸式紅外測溫的方式對鍋爐待焊部件的預(yù)熱溫度進行測量,改善了以往測溫中設(shè)備損耗大、測溫成本高的弊端,提高了測量的簡便性；同時,在系統(tǒng)網(wǎng)絡(luò)通信方面分析了ZigBee在鍋爐生產(chǎn)車間復(fù)雜通信條件下應(yīng)用的可行性,確定以ZigBee協(xié)議棧為基礎(chǔ)的XBee-Pro模塊作為系統(tǒng)的網(wǎng)絡(luò)通信解決方案,并完成系統(tǒng)網(wǎng)絡(luò)結(jié)構(gòu)設(shè)計。針對系統(tǒng)具備的基本功能,本文設(shè)計完成了系統(tǒng)的硬件、軟件總體結(jié)構(gòu)。并根據(jù)硬件總體結(jié)構(gòu)設(shè)計完成了基于AVR處理芯片ATmega128的控制電路,包括ATmega128與傳感器的AD采樣電路、ATraega128與無線模塊的USART的數(shù)據(jù)通信電路、電源電路、存儲器電路、DS18B20的環(huán)境溫度測量電路、溫度數(shù)據(jù)顯示及聲光報警電路等；根據(jù)軟件總體結(jié)構(gòu),對處理器ATmega128內(nèi)部各模塊的特點及各功能寄存器的使用設(shè)置進行了說明和配置。設(shè)計完成本系統(tǒng)各個功能的程序,包括預(yù)熱溫度采集板與上位機通信程序、AD采樣程序、數(shù)據(jù)顯示程序和數(shù)據(jù)存儲程序等。研究虛擬儀器的開發(fā)技術(shù),設(shè)計開發(fā)出基于串口通信的LabVIEW上位機監(jiān)控程序,使系統(tǒng)具備總體實時監(jiān)測焊接車間中預(yù)熱作業(yè)點相關(guān)參數(shù)的功能。
[Abstract]:Boiler plays an important role in production activities, and there are a large number of welding structures in the boiler products. Whether the welding quality passes or not is directly related to the safe operation of the boiler. It is an important aspect to ensure the quality of boiler products that the temperature of the structural parts to be welded before welding can meet the process requirements. Therefore, how to measure preheating temperature in boiler welding process economically, efficiently and accurately is the basis to ensure the quality of boiler products within the range of process requirements. Combined with the practical application background of the temperature measurement system, this paper analyzes and puts forward the method of non-contact infrared temperature measurement to measure the preheating temperature of the parts to be welded in the boiler, which improves the disadvantages of large equipment loss and high temperature measurement cost in the past. The simplicity of measurement is improved. At the same time, the feasibility of the application of ZigBee in the complex communication condition of boiler workshop is analyzed in the aspect of system network communication, and the XBee-Pro module based on ZigBee protocol stack is determined as the network communication solution of the system. And complete the system network structure design. In view of the basic functions of the system, the hardware and software structure of the system is designed and completed in this paper. According to the overall hardware structure, the control circuit based on AVR processing chip ATmega128 is designed, including AD sampling circuit between ATmega128 and sensor, data communication circuit between ATraega128 and wireless module USART, power supply circuit, memory circuit. DS18B20 environment temperature measurement circuit, temperature data display and acousto-optic alarm circuit; According to the overall structure of the software, the characteristics of each module in the processor ATmega128 and the usage and setting of each functional register are explained and configured. The program of each function of the system is designed, including the communication program between preheating temperature acquisition board and host computer, the AD sampling program, the data display program and the data storage program, etc. This paper studies the development technology of virtual instrument, designs and develops the monitoring program of LabVIEW PC based on serial port communication, which makes the system have the function of monitoring the parameters of preheated working points in welding workshop in real time.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TK226.2

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