Temperature inter-compensation for single-line optical fiber sensors based on Brillouin and fiber Bragg grating technique
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摘要: 为了解决实际工程应用中光纤光栅和分布式布里渊共线技术测试应变的绝对温度补偿方法成本较高、不易布设等问题,采用光纤布里渊和布喇格光栅共线技术应变感知的温度互补偿方法,通过感知探头——双光纤光栅-纤维增强复合智能筋的室内和户外温度补偿试验探讨了该方法的有效性和适用性。结果表明,该方法可以实现光纤布里渊和光纤光栅的准分布式温度互补偿,误差低于8%,在工程接受范围内。此外,该技术还能同时给出应变和温度双参量测试结果,简化了传感系统,降低了布设成本,适合实际工程应用。Abstract: In order to solve the problems that absolute temperature compensation for strain sensing of single line optical fiber sensors based on Brillouin and fiber Bragg grating encounters, e.g. high cost and difficulty of installation, a novel temperature inter-compensation method was presented. Based on a sensor, i.e,a dual fiber reinforced polymer-fiber Bragg grating rebar, experiments were carried out under room and outdoor environments. The results show that the temperature inter-compensation can be easily realized with a practically acceptable error less than 8%. Moreover this method can also give the dual parameters of strain and temperature values simultaneously. The system based on optical fiber sensors is suitable for practical applications for its simple structure and low cost.
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