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首页> 外文会议>RIAO/OPTILAS 2004 >Simultaneous measurement of temperature and pressure using single fiber Bragg grating and fixed filter demodulation technique
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Simultaneous measurement of temperature and pressure using single fiber Bragg grating and fixed filter demodulation technique

机译：使用单光纤布拉格光栅和固定滤波器解调技术同时测量温度和压力

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摘要

Fiber Bragg grating (FBG) sensors offer many advantages for monitoring strain and temperature, other physical parameters can be measured through the use of mechanical transducers. However, FBGs are sensitive to strain and temperature and, in many cases, it is difficult to discriminate both measurements. To overcome this problem several techniques have been proposed, most of them employing more than one grating. This work demonstrates the possibility to discriminate temperature and pressure measurements using only one FBG sensor and a low cost demodulation technique based on two fixed filters. A pressure transducer has been used to transfer a lateral force to the fiber, proportional to the applied pressure, generating birefringence in the Bragg grating. The system allowed to measure pressure in the range of 0 to 400 psi with uncertainty of 4 psi and, simultaneously, measure temperature in a range of 22℃ with uncertainty of 0.1 ℃.
机译：光纤布拉格光栅（FBG）传感器在监视应变和温度方面具有许多优势，其他物理参数可以通过使用机械传​​感器进行测量。但是，FBG对应变和温度敏感，在许多情况下，很难区分这两种测量。为了克服这个问题，已经提出了几种技术，其中大多数采用不止一个光栅。这项工作证明了仅使用一个FBG传感器和基于两个固定滤波器的低成本解调技术来区分温度和压力测量的可能性。已使用压力传感器将与施加的压力成比例的横向力传递到光纤，从而在布拉格光栅中产生双折射。该系统允许在0至400 psi的范围内测量压力，不确定度为4 psi，同时允许在22℃的范围内测量温度，不确定度为0.1℃。

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