摘要:
闡述了Bragg光纖光柵(BOFG)樹型傳感陣列概念。該陣列與串型結(jié)構(gòu)相比具有如下優(yōu)點(diǎn):對陣列傳感元的中心波長不存在間隔分布要求,可以采用統(tǒng)一(中心波長相同)的傳感元組陣,造價(jià)低,易于商用化;帶載能力強(qiáng)(組陣傳感元數(shù)量可以做得很大),適用于大面積實(shí)時(shí)監(jiān)測;光電接合部多光路傳輸,提高了抗故障能力。以具體方案介紹了系統(tǒng)構(gòu)成原理。通過原理分析和典型參數(shù),進(jìn)行了數(shù)值計(jì)算,并分析了陣列特性,得出了一些有價(jià)值的結(jié)論。
Abstract:
The concept of tree topology Bragg Optical Fiber Grating(BOFG) distribution sensing array is introduced.Comparing with the serrial topology array,this type of arrays has the following advantages.First,it is not necessary that the central reflecting wavelengths of all the BOFG sensors must be different.In general,they can be identical.Thus,the cost of producing the snesors can be cheaper and they will easily be commercialized;Secondly,for this type of arrays,it is likely that a large number of sensors can be employed and therefore it can be applied to large area real-time monitoring.Finally,because there is more than one optical path at the interface between the electronics and the monitored body the performance of antifailure will greatly be improved.The principle of the system construction is expounded buy a design example.According to the principle analysis and the typical parameters,the numerical results is presented and the performance of this array is analyzed.Meanwhile,some valuable conclusions are obtained.
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