發(fā)布時(shí)間：2018-06-03 02:58

  本文選題：光纖傳感 + Sagnac　； 參考：《傳感技術(shù)學(xué)報(bào)》2017年05期

【摘要】：為了減少直線結(jié)構(gòu)Sagnac分布式光纖傳感系統(tǒng)的定位誤差,提出一種多級零頻點(diǎn)的優(yōu)化方法,通過分析直線結(jié)構(gòu)Sagnac分布式光纖傳感定位原理,確定固定的采樣速率下離散化是造成定位誤差大的原因。并分析得出振動(dòng)信號頻域曲線會(huì)周期出現(xiàn)多個(gè)零頻點(diǎn),進(jìn)而對振動(dòng)定位的多級零頻點(diǎn)優(yōu)化方法進(jìn)行了理論推導(dǎo),闡明高倍零頻點(diǎn)下的定位誤差會(huì)有效減小。通過實(shí)驗(yàn)驗(yàn)證表明,在總長為11.769 km的傳感光纖上,優(yōu)化后的定位方法在不改變采樣速率下可保證定位誤差提升到±20 m范圍內(nèi),可以基本滿足系統(tǒng)對外界振動(dòng)信號進(jìn)行精確定位的要求。
[Abstract]:In order to reduce the positioning error of linear Sagnac distributed optical fiber sensor system, a multi-level zero frequency optimization method is proposed. The principle of linear Sagnac distributed optical fiber sensor positioning is analyzed. Discretization at a fixed sampling rate is the cause of large positioning errors. It is concluded that there will be several zero frequency points in frequency domain curve of vibration signal, and then the optimization method of multi-level zero frequency point for vibration location is deduced theoretically, and it is shown that the positioning error can be reduced effectively at high zero frequency point. The experimental results show that the optimized positioning method can increase the positioning error to 鹵20m without changing the sampling rate on the sensing fiber with a total length of 11.769 km. It can basically meet the requirements of the system for accurate positioning of external vibration signals.
【作者單位】： 太原理工大學(xué)新型傳感器與智能控制教育部與山西省重點(diǎn)實(shí)驗(yàn)室;山西煤層氣(天然氣)集輸有限公司;
【基金】：國家自然科學(xué)基金項(xiàng)目(51375327) 山西省回國留學(xué)人員科研項(xiàng)目(2016-035) 山西省煤基重點(diǎn)科技攻關(guān)項(xiàng)目(MQ2014-09)
【分類號】：TP212
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本文編號：1971201