摘要
利用碳纳米管拉曼特征峰位对其变形的灵敏特性,基于拉曼光谱的碳纳米管应变传感方法,已经实现了针对非拉曼活性固体材料表面微尺度范围内的平面应变分量非接触传感测量。本文侧重该方法在微尺度实验力学研究中的推广应用,从传感介质和制备工艺的选择出发,采用改进后的三种不同工艺,制备了碳纳米管/环氧树脂复合薄膜作为传感介质;综合零载标定实验和步进单轴拉伸标定实验的实测结果,对比分析了不同工艺获得传感介质的应变传感灵敏度、量程、稳定性和时间分辨率四个关键性能指标;最后对传感性能的影响因素进行了探讨。
Taking advantage of the sensitivity of carbon nanotube Raman peak to its deformation and carbon nanotube strain sensing method based on Raman spectra,a non-contact sensing measurement of in-plane strain components within the range of microscale surface for non-Raman-active solid materials is already achieved.The purpose of this paper is to apply and promote this method in the study of micro-scale experimental mechanics.Focusing on sensing media selection and preparation process improvement,adopting carbon nanotube/epoxy composite film as the sensing medium,which is prepared by three different improved preparation processes,an experimental study on the properties of Raman-based CNT strain sensor was carried out.Based on the calibration results of both zeroloading experiment and stepping uniaxial tensile experiment,four key performance indicators of sensing media prepared by different processes including strain sensing sensitivity,measuring range,stability and time resolution,were comparatively analyzed.Finally,the factors affecting sensing performance are discussed in this paper.
出处
《实验力学》
CSCD
北大核心
2014年第5期527-536,共10页
Journal of Experimental Mechanics
基金
国家重点基础研究发展计划(2012CB937500)
国家自然科学基金(11227202
11272232和11172054)
2013教育部新世纪优秀人才支持计划资助
关键词
碳纳米管应变传感器
显微拉曼光谱
传感性能
传感介质
制备工艺
carbon nanotube strain sensor
Raman microspectroscopy
sensing performance
sensing media
preparation process
