發(fā)展光纖傳感器網(wǎng)絡(luò)

　　本文著眼于光纖傳感器網(wǎng)絡(luò)的挑戰(zhàn)和優(yōu)勢，著重于較低的數(shù)據(jù)速率。它涵蓋了不同纖維技術(shù)的傳感器和變送器的影響從遠(yuǎn)程網(wǎng)絡(luò)玻璃塑料的短，低成本的實(shí)現(xiàn)，以及復(fù)用傳感器的挑戰(zhàn)，設(shè)備從Avago、工業(yè)光纖、億光、霍尼韋爾。

　　光纖越來越多地被用作傳感器網(wǎng)絡(luò)的集成部分，用于在多個(gè)節(jié)點(diǎn)上聚合傳感器數(shù)據(jù)，同時(shí)也作為傳感器本身。這為光網(wǎng)絡(luò)的使用和建立這種系統(tǒng)的組件開辟了新的機(jī)會(huì)。

　　隨著人們對物聯(lián)網(wǎng)和智能城市的興趣越來越大，將傳感器數(shù)據(jù)聚集到大范圍，有時(shí)甚至像城市一樣大的能力變得越來越重要。這正在轉(zhuǎn)移一些光纖網(wǎng)絡(luò)發(fā)展的焦點(diǎn)。傳感器網(wǎng)絡(luò)使用相對較低的數(shù)據(jù)速率，并且傳統(tǒng)上沒有使用高帶寬光纖網(wǎng)絡(luò)。然而，傳感器的數(shù)量是現(xiàn)在光纖傳輸更有效和高效的媒介，只要數(shù)據(jù)可以有效地復(fù)用到光纖，準(zhǔn)確de混合在另一端。這帶來了額外的優(yōu)勢，因?yàn)楣饫w網(wǎng)絡(luò)天生就不受電磁兼容和電氣噪聲的影響，使傳感器能夠在嘈雜的工業(yè)環(huán)境中更有效地工作。

　　A researcher at the UPNA-Public University of Navarre has looked at various fiber-optic sensor networks for the remote monitoring of large infrastructures. Montserrat Fernández-Vallejo， a telecommunications engineer， has developed an experimental network that is 250 km in size and has multiplexing capability to allow multiple channels to be carried at the same time. This has enabled new lines of research and a host of practical applications to be opened up， particularly for monitoring intelligent or large infrastructures where there are hundreds or even thousands of sensors. Such structures can be monitored from central sites many miles away， logging measurements of structural or environmental parameters， critical states to be observed， the correct maintenance to be provided， and even preventing accidents by highlighting failing equipment that can be repaired before it causes a problem. This applies not just on the scale of a city， but also for remote equipment such as oil rigs and other marine platforms with thousands of distributed sensors.