CAJ | 학술논문

光纤应变传感技术在国外已广泛应用于船体结构健康监测之中，而在国内鲜有工程实际应用的尝试，究其原因，光纤传感器的结构封装是影响光纤传感技术工程化应用的重要因素。针对某船体结构应力监测系统原理样机所选型的Fabry-Perot光纤应变计，介绍其测量原理，建立封装结构试验模型，并对该结构开展了静态应变传感特性、动态应变传感特性以及温度特性的试验研究。分析结果表明，该型光纤应变计静态、动态应变测量结果与基于电阻应变片的电测法结果偏差小于2%，从而验证了光纤应变计测量数据的准确性。同时，应变—温度的关系曲线也表现出良好的一致性和线性，这表明该型光纤应变计的封装结构能满足舰船温度环境条件。
광섬응변전감기술재국외이엄범응용우선체결구건강감측지중，이재국내선유공정실제응용적상시，구기원인，광섬전감기적결구봉장시영향광섬전감기술공정화응용적중요인소。침대모선체결구응력감측계통원리양궤소선형적Fabry-Perot광섬응변계，개소기측량원리，건립봉장결구시험모형，병대해결구개전료정태응변전감특성、동태응변전감특성이급온도특성적시험연구。분석결과표명，해형광섬응변계정태、동태응변측량결과여기우전조응변편적전측법결과편차소우2%，종이험증료광섬응변계측량수거적준학성。동시，응변—온도적관계곡선야표현출량호적일치성화선성，저표명해형광섬응변계적봉장결구능만족함선온도배경조건。
Internationally, the fiber optic strain sensing technology has been widely applied to the hull structure health monitoring. However, such technology is rarely used in domestic engineering applications for the reason that the structural package of fiber optic sensors, one of the main factor that impacts the per?formance of the fiber-optic sensing technology, is still unclear. In this paper, a certain type of Fabry-Perot fiber optic strain gauge is selected by a prototype hull structure stress monitoring system, and the corre?sponding principle of the fiber optic strain gauge is introduced. Meanwhile, a structure test model is con?structed, an experimental study on static strain tests, dynamic strain tests, and temperature characteristics is carried out. The results show that the static and dynamic strain measurement error induced by the two methods (the one based on the fiber-optic strain gauge and the one based on the electrical resistance strain gauge) is less than 2%, which verifies the accuracy of the fiber-optic strain gauge measurement data;in ad?dition, strain-temperature curves reveal decent linearity and consistency, indicating that the structural package of the fiber optic strain gauge successfully meets the ship ambient temperature conditions.