本文選題：反射光譜辨識(shí) + 光纖光柵�。� 參考：《光譜學(xué)與光譜分析》2017年09期

【摘要】：針對(duì)飛行器機(jī)載環(huán)境多參量綜合測(cè)試需求,研究了一種基于反射光譜特征辨識(shí)的光纖布拉格光柵(FBG)氣壓與溫度集成監(jiān)測(cè)方法,給出了基于膜片式結(jié)構(gòu)的雙參量傳感機(jī)理及其理論模型。采用基于耦合模理論的OptiGrating軟件,得到不同氣壓與溫度條件下光纖布拉格光柵傳感器仿真反射光譜。在此基礎(chǔ)上,借助彈塑性和恢復(fù)性能優(yōu)良的平膜片感壓機(jī)構(gòu),構(gòu)建了膜片式雙光纖氣壓/溫度集成監(jiān)測(cè)模型。研究表明,恒溫條件下應(yīng)變傳感光纖光柵反射光譜隨氣壓增加而逐漸向短波方向偏移,其中心波長(zhǎng)靈敏度約為0.803 0nm·MPa~(-1),且反射譜主峰及其旁瓣峰值均隨氣壓變化呈現(xiàn)良好線性關(guān)系;當(dāng)氣壓恒定而溫度變化時(shí),處于僅感溫不受力狀態(tài)的溫度傳感光纖光柵反射光譜中心波長(zhǎng)靈敏度約為9.39pm·℃~(-1);當(dāng)氣壓與溫度交叉變化時(shí),能夠?qū)崿F(xiàn)對(duì)變溫條件下的微小氣壓變化實(shí)時(shí)監(jiān)測(cè)。傳感光纖光柵受非均勻應(yīng)變效應(yīng)反射光譜存在一定啁啾現(xiàn)象,其反射光譜旁瓣峰值波長(zhǎng)隨環(huán)境溫度、氣壓變化均會(huì)發(fā)生偏移,具有良好線性關(guān)系,且在不同氣壓下反射光譜對(duì)應(yīng)的同一階數(shù)旁瓣峰值幅度相等。該研究能夠?yàn)楹娇蘸教炱飨到y(tǒng)多物理參量在線綜合測(cè)試提供有益幫助。
[Abstract]:In order to meet the requirements of multi-parameter integrated measurement for airborne environment of aircraft, a method of integrated monitoring of pressure and temperature of fiber Bragg grating (FBG) based on reflection spectrum feature identification is studied. The mechanism and theoretical model of two-parameter sensor based on diaphragm structure are presented. The simulation reflectance spectra of fiber Bragg grating sensors under different pressure and temperature are obtained by using OptiGrating software based on coupling mode theory. On the basis of this, an integrated pressure / temperature monitoring model of double optical fiber with diaphragm is constructed by means of flat diaphragm pressure mechanism with good elastoplastic and restoring properties. The results show that the reflectance spectrum of strain sensing fiber Bragg grating shifts to the shortwave direction with the increase of atmospheric pressure at constant temperature. The sensitivity of the central wavelength is about 0.803 0nm MPA ~ (-1) ~ (-1), and the main peak of the reflection spectrum and the peak value of the sidelobe show a good linear relationship with the change of the pressure. When the pressure is constant and the temperature changes, the sensitivity of the center wavelength of the reflected spectrum of the fiber Bragg grating is about 9.39pm 鈩，

本文編號(hào)：1775352