本文選題：砷化鎵 + 光纖傳感�。� 參考：《廣東工業(yè)大學(xué)》2015年碩士論文

【摘要】：溫度是表征物體冷熱程度的物理量,是工業(yè)、醫(yī)藥、科學(xué)研究等多領(lǐng)域中最重要的測量物理量之一,是工業(yè)自動(dòng)化生產(chǎn)中的關(guān)鍵環(huán)節(jié)。以熱敏電阻、熱電偶等用電信號(hào)作為工作基礎(chǔ)的溫度傳感器在國民經(jīng)濟(jì)、科學(xué)研究、國防建設(shè)、空間技術(shù)中發(fā)揮了重大作用。但此類傳感器具有易受到電磁干擾和輻射影響等多種缺點(diǎn)。尤其在某些特定領(lǐng)域(如工業(yè)生產(chǎn)、石油化工、電力、醫(yī)學(xué)等領(lǐng)域),傳統(tǒng)電傳感方法在易燃易爆或易受到電磁干擾的環(huán)境中進(jìn)行溫度測量時(shí),受到很大程度的限制。隨著光纖制造技術(shù)、光纖傳感技術(shù)、信號(hào)分析與處理技術(shù)的飛速發(fā)展,使光纖測溫方法逐漸發(fā)展為一種新型的測溫技術(shù)。本文結(jié)合光纖測溫的技術(shù)特點(diǎn)和國內(nèi)外研究現(xiàn)狀,對(duì)砷化鎵晶體的光學(xué)特性進(jìn)行充分研究,再進(jìn)一步對(duì)砷化鎵溫度傳感技術(shù)進(jìn)行理論分析,設(shè)計(jì)了一種具有光源波形自校準(zhǔn)功能和光譜分析裝置自校準(zhǔn)功能的砷化鎵吸收式多通道光纖溫度監(jiān)測系統(tǒng)。設(shè)計(jì)的光源波形自校準(zhǔn)功能可以消除光源的電流強(qiáng)度的變化和光源所處環(huán)境變化對(duì)光源強(qiáng)度抖動(dòng)、波形變化造成溫度測量的誤差,光譜分析裝置自校準(zhǔn)功能可以消除光譜分析裝置所處環(huán)境溫度變化帶來的光譜測量波長漂移問題,同時(shí)本文的多通道光路設(shè)計(jì)滿足多點(diǎn)測量溫度的需求�；谏榛壩展庾V邊緣波長隨溫度的升高向長波長方向漂移的特性,本文提出了一種適用于本測溫系統(tǒng)的光譜解調(diào)數(shù)據(jù)處理方法,消除了背景光譜噪聲,消除了光譜分析儀的暗電流散粒噪聲、復(fù)位噪聲、放大器噪聲、以及光散粒噪聲構(gòu)成的背景噪聲。本方法基于波長調(diào)制來解調(diào)光譜中的溫度信息,可避免測溫系統(tǒng)強(qiáng)度變化導(dǎo)致的測量誤差,并設(shè)計(jì)實(shí)驗(yàn)進(jìn)一步驗(yàn)證該解調(diào)方法的合理性。本方法采用查詢校對(duì)表的方式來獲取溫度值,可減少測溫系統(tǒng)的數(shù)據(jù)運(yùn)算量,降低測溫系統(tǒng)主控單元的功耗,提高測溫速度。本數(shù)據(jù)處理方法在25℃～70℃區(qū)間,測量精度小于±0.1℃,在70℃～250℃區(qū)間,測量精度小于±0.7℃。實(shí)驗(yàn)結(jié)果表明,該解調(diào)方法解調(diào)精度高運(yùn)算量小滿足測溫系統(tǒng)需求。為驗(yàn)證本文所設(shè)計(jì)的測溫系統(tǒng)自校準(zhǔn)功能的有效性,分別設(shè)計(jì)了波形自校準(zhǔn)對(duì)比試驗(yàn)以及光譜分析裝置對(duì)比試驗(yàn)。實(shí)驗(yàn)結(jié)果表明,當(dāng)測溫系統(tǒng)在光源強(qiáng)度變化以及系統(tǒng)光源處在不同環(huán)境溫度時(shí),有波形自校準(zhǔn)功能的測溫系統(tǒng)能夠有效解決上述干擾問題：當(dāng)光譜分析裝置的使用環(huán)境溫度發(fā)生變化時(shí),具有光譜自校準(zhǔn)功能的測溫系統(tǒng)能夠有效消除溫度對(duì)光譜分析裝置帶來的波長漂移問題,使系統(tǒng)測溫誤差更小、精度更高。實(shí)驗(yàn)結(jié)果表明本文所設(shè)計(jì)的基于砷化鎵吸收式多通道自校準(zhǔn)光纖溫度檢測系統(tǒng)性能較好。本文設(shè)計(jì)測溫系統(tǒng)可以推廣在煉油廠、加油站、油庫等易燃易爆環(huán)境中使用。該系統(tǒng)也同樣適用于微波工業(yè)中的微波加熱、微波化學(xué)、大電機(jī)定子、軸瓦等設(shè)備以及醫(yī)療行業(yè)中的射頻、微波治療儀、磁共振成像等儀器的溫度監(jiān)測。
[Abstract]:Temperature is a physical quantity, characterization of objects and degree is industry, medicine, one of the most important physical quantity measurement in many fields of scientific research, is a key link in the production of industrial automation. With thermal resistance, thermocouple and other electrical signals as the base temperature sensor in the national economy, scientific research, national defense construction, play a major role in space technology. But this kind of sensor is susceptible to electromagnetic interference and radiation and other shortcomings. Especially in certain areas (such as industrial production, petrochemical, power, medicine and other fields), the traditional electric sensing method for temperature measurement in flammable and explosive or susceptible to electromagnetic interference in the environment, by a large extent limit. With the development of optical fiber manufacturing technology, optical fiber sensing technology, the rapid development of the technology of signal analysis and processing, so that the optical fiber temperature measurement method has gradually developed into a new temperature measurement technology Operation. Optical fiber temperature measurement technology and the research situation at home and abroad this paper fully studied the optical properties of GaAs crystal, further to GaAs temperature sensing technology theory analysis, design of a light source with waveform analysis of self calibration function and spectral device self calibration function of GaAs absorption type multi channel optical fiber temperature monitoring system the source waveform design. Self calibration function can eliminate the current intensity of a light source and the change of light environment change jitter on the intensity of the light source, the temperature measurement error caused by the change of waveform, spectrum analysis device self calibration function can eliminate the problem of spectral analysis of wavelength spectral measurement device of the environment drift caused by temperature change, the design of multi channel light at the same time, the road meet multi point temperature measurement. The absorption spectra of GaAs edge to longer wavelength with increasing temperature based on The characteristics of wavelength demodulation, spectrum data processing method is presented. The temperature measurement system, eliminate the background noise spectrum, spectrum analyzer to eliminate dark current shot noise, noise reduction, amplifier noise, and the shot noise of background noise. The wavelength modulation demodulation spectrum temperature information based on this method, which can avoid the measurement error caused changes in the intensity of temperature measurement system, and the rationality of the design experiments to further verify the demodulation method. This method adopts query gauge approach to obtain the temperature value, can reduce the amount of data operation temperature measurement system, reduce the power consumption of main control unit of the temperature measurement system, improve the measuring speed of processing method. The data in the range of 25 to 70 DEG C, the measurement accuracy is less than 0.1 DEG C, at 70 to 250 DEG C range, the measurement accuracy is less than 0.7 degrees. The experimental results show that the demodulation method and demodulation The demand of high precision temperature measurement system. A small amount of computation to meet the validity of the self calibration function of temperature measurement system designed to validate the designed waveform self calibration experiments and spectral analysis device experiments. The experimental results show that when the temperature measurement system in the intensity of light source and light source system at different ambient temperature, a temperature measurement system waveform of self calibration function can effectively solve the problem of interference: when using spectral analysis device. When the temperature changes, the spectral temperature measurement system with self calibration function can effectively eliminate the temperature on the problem of wavelength drift analysis device brings the light spectrum, the errors of the measurement system is smaller, higher accuracy. The experimental results show that the design of the GaAs multi channel performance of self calibration of optical fiber temperature measurement system based on the better. This paper design of temperature measurement system can be extended in refinery, Gas stations, oil depots and other flammable and explosive environments. This system is also suitable for microwave heating, microwave chemistry, large motor stator, Bush and other equipments in microwave industry, as well as temperature monitoring for RF, microwave therapy apparatus and magnetic resonance imaging instruments in medical industry.

【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TP274;TN253

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