拱形应变传感器的优化设计  

Optimum design of arch strain sensor

作　　者：徐港[1] 陈少坤 武文林 彭艳周[1] XU Gang;CHEN Shaokun;WU Wenlin;PENG Yanzhou(School of Civil and Architecture,China Three Gorges University,Yichang 443002,Hubei China)

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《华中科技大学学报（自然科学版）》2021年第4期91-95,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51379111);湖北省自然科学基金资助项目(2018CFB642)。

摘　　要：通过理论分析、数字模拟及试验研究探讨拱形应变传感器输出灵敏度的影响因素及其影响规律.研究结果表明:拱形应变传感器拱顶的开槽、拱轴线形、拱高、拱跨及截面尺寸为其输出灵敏度主要影响因素,其中拱顶开槽的影响最为显著.依据各因素影响程度的不同,得到了拱形应变传感器的最优尺寸,拱的净跨为100 mm,拱高为17 mm,据此制作出拱形应变传感器实物.将所制作的拱形应变传感器以电阻式应变片进行输出灵敏度的标定并试验验证其适用性,实践表明所设计的拱形应变传感器可重复使用并且具有较高的输出灵敏度.Through theoretical analysis,digital simulation and experimental study,the influencing factors and rules of the output sensitivity of arch strain sensor were discussed.Results show that the main influencing factors of the output sensitivity of arch strain sensor are the arch notch,arch axis alignment,arch height,arch span and cross-section size,among which the arch notch has the most significant effect.According to the influence degree of each factor,the optimal size of the arch strain sensor was obtained.The net span of the arch was 100 mm,and the height of the arch was 17 mm.Based on this,the arch strain sensor was manufactured.The output sensitivity of the manufactured arch strain sensor was calibrated by resistance strain gauge, and its applicability was verified by experiment.The practice shows that the designed arch strain sensor can be reused and has high output sensitivity.

关 键 词：拱形应变传感器 力学计算模型 两铰圆拱 拱顶应变 输出灵敏度 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]