摘要
为了实现高精准、实时性的建筑变形监测,设计建筑内嵌式柔性微型压力传感器模型,并通过结构优化逐步提高其对建筑物内应力信号的传感灵敏度与传感精度。利用COMSOL仿真软件构建基于PVDF压电式微型压力传感器有限元模型,通过对传感层进行表面微结构与体内孔隙修饰等方法改进器件结构,以此提高压电传感层的应变能力。研究结果表明,相比于传统平面传感层器件,其压力传感性能获得大幅提升,其中压电势传感信号增强490%,传感器灵敏度提升676%。最后,构建阵列化压力传感器模型,并通过优化结构提高传感器阵列对力学信号响应的空间分辨率,这有助于精准探测建筑物内应力的爆发位置与扩散路径。
In order to realize high-precision and real-time monitoring of building deformation,the embedded flexible miniature pressure sensor model is designed,and its sensing sensitivity and sensing precision of building internal stress signal are gradually improved through structural optimization.COMSOL simulation software was used to construct the finite element model of the micro pressure sensor with PVDF piezoelectric materials.The device structure was improved by modifying the surface microstructure and pores in the sensor layer,so as to improve the strain capacity of the piezoelectric sensor.The results show that compared with traditional sensors with planar layer,the pressure sensing performance of the designed device has been greatly improved,in which the piezometric potential is increased by 490%,and the sensor sensitivity is increased by 676%.Finally,a pressure sensor array model is constructed,and the spatial resolution response to mechanical signals is improved by optimizing the structure of the sensor arrays,which is contribute to accurately detecting the explosion location and diffusion path of the stress in the building.
作者
张昊
阙妙玲
李静雯
ZHANG Hao;QUE Miaoling;LI Jingwen(College of Electronic and Information Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)
出处
《机械与电子》
2024年第2期3-8,共6页
Machinery & Electronics
基金
中国博士后科学基金面上项目(2022M712333)
江苏省高等学校基础科学(自然科学)研究项目(23KJB510030)。
关键词
建筑变形监测
压力传感器
压电
有限元仿真
高灵敏度
building deformation monitoring
pressure sensor
piezoelectric
finite element simulation
high sensitivity
