个人信息Personal Information
教授 博士生导师
招生学科专业:
力学 -- 【招收硕士研究生】 -- 航空学院
机械工程 -- 【招收博士、硕士研究生】 -- 航空学院
机械 -- 【招收博士、硕士研究生】 -- 航空学院
任职 : 省部级重点实验室副主任
性别:男
毕业院校:南京航空航天大学
学历:南京航空航天大学
学位:工学博士学位
所在单位:航空学院
联系方式:penghm@nuaa.edu.cn
电子邮箱:
Design of PVDF sensor array for determining airflow direction and velocity
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所属单位:航空学院
发表刊物:REVIEW OF SCIENTIFIC INSTRUMENTS
关键字:CRICKET SENSITIVITY CYLINDER SYSTEM
摘要:An airflow sensor comprised of an array of piezoelectric polyvinylidene fluoride (PVDF) cantilever sensors mounted on a sensor ring is fabricated. A fluid-solid-electric coupling model based on the finite element method is presented to obtain the mathematical relationship between the normal airflow velocity and the response voltage. According to the response voltages from all pieces of PVDF cantilevers in the array, the values of the airflow direction and the velocity can be calculated. Furthermore, to find a suitable algorithm for error calculations and to achieve high accuracy, a method of reducing the flow angle error ((E-alpha n,E-cal) over bar) and flow velocity error ((Delta v(n,cal)) over bar) by extracting U-m of the effective cantilevers can be established. The experimental results show that the maximum value of (E-alpha n,E-cal) over bar is 1.2 degrees (at 270 degrees with 11.1 m/s) and the minimum value of (E-alpha n,E-cal) over bar is 0.3 degrees (at 135 degrees with 11.1 m/s) based on the PVDF sensor array with eight cantilevers. Meanwhile, the maximum value of (E-vn,E-cal) over bar is 3% (at 315 degrees with 11.1 m/s), and the minimum value of (E-vn,E-cal) over bar is 1.5% (at 360 degrees with 11.1 m/s). In addition, under 20 random airflow angles at 8 m/s, the error range in airflow velocity is from 1.27% to 2.67%, the error range in airflow angle is from 0.34 degrees to 1.24 degrees, and the response time is 20 ms. Therefore, the proposed design for an airflow sensory ring array can be used to determine the airflow direction and velocity, and the airflow sensor can be miniaturized as a bionic antennae, which is mounted on the skin of a piezoelectric autonomous mobile robot for sensing and escaping from an attack of the natural enemy. Published by AIP Publishing.
ISSN号:0034-6748
是否译文:否
发表时间:2018-08-01
合写作者:胡杰,Yao, Xinke
通讯作者:彭瀚旻