摘要
压电复合材料的温度形变会对换能器和声呐系统的关键性能产生多种致命影响,但目前很少有针对其形变测试方法的研究。提出一种基于光纤光栅传感的方法测量压电复合材料温度形变,并对其相关性能参数进行测试。测试结果表明:压电复合材料长度方向的形变随温度增加而增加,长度方向相对变化率为1. 245 2;在30~75℃范围内,介电常数随温度增加而增加,其相对变化率为2. 657 4;在75~105℃范围内,介电常数仍随温度增加而增加,其相对变化率为1. 911 8。
The deformation of piezoelectric composite has many deadly effects on transducers and sonar systems.However,there have been few studies on its deformation test methods.A novel fiber-grating-sensing method is developed for the study of temperature deformation of the piezoelectric composites.At the same time,the principle of temperature deformation test of piezoelectric composites is expounded and its related performance parameters are tested.With the increase of temperature,the deformations of the piezoelectric composite in length direction increases,and the increasing speeds(means slop of fitted line)is 1.2452.After adding the deform information,the data for the dielectric constant are revised.The increasing speed of dielectric constant is 2.6574 in the range of 25℃~75℃,and 1.9118 in the range of 75℃~125℃.
作者
白智奇
王丽坤
廖擎玮
秦雷
BAI Zhiqi;WANG Likun;LIAO Qingwei;QIN Lei(Beijing Key Laboratory of Sensors,Beijing Information Science&Technology University,Beijing 100192,China)
出处
《北京信息科技大学学报（自然科学版）》
2019年第3期39-42,47,共5页
Journal of Beijing Information Science and Technology University
基金
国家自然科学基金资助项目(11604363,61871043,61671068)
关键词
压电复合材料
光纤光栅
换能器
温度形变
piezoelectric composite
fiber grating
transducer
temperature deformation
