非侵入式翼伞组提带张力测量传感器的设计

Design of Non-invasive Tension Measurement Sensor for the Parachute Lifting Belt

实时掌握并安全稳定地测量翼伞组提带张力大小,探究组提带张力与翼伞姿态的反馈关系,对翼伞研究非常重要。为解决目前翼伞组提带张力传感器量程小、结构复杂,以及破坏组提带结构等问题,本文设计了一种体积小、易于安装和拆卸、对翼伞组提带结构无破坏的双臂梁旁压式大量程张力传感器。本文使用SolidWorks对传感器弹性体进行建模,并使用ANSYS有限元分析软件对其进行静力学分析与模态仿真分析,通过分析结果对传感器弹性体模型的结构进行调整优化,从理论上证明传感器弹性体结构设计的合理性。设计了以STM32为主控芯片的信号采集系统,完成张力信号的采集、数据处理和数据存储等功能。使用拉力机对设计的翼伞组提带张力传感器实物进行多次测试,试验结果表明所设计的张力传感器具有高结构强度、高精度、良好的线性度以及重复性,满足对翼伞组提带张力的无损测量需求。

It is very important for the parachute study to master in the real time and measure safely and stably the tension of the parafoil group straps,as well as to explore the feedback relationship between the parafoil group straps tension and the parafoil posture.In order to solve the problems such as small range,complex structure and destruction of the structure of parafoil group straps,a large range tension sensor with two-arm beam side pressure was designed to measure the tension of the parafoil group straps,which is non-invasive,small in size,easy to install and disassemble.The sensor elastic body was designed by using SolidWorks,and the finite element simulation of the sensor elastic body was carried out by using ANSYS.Based on the analysis results,the structure of the sensor elastic body is adjusted and optimized,and the rationality of the sensor elastomer structure design is proved theoretically.A signal acquisition system with STM32 as the main control chip is designed to complete the functions of tension signal acquisition,data processing and data storage.A tensile machine was used to test the sensor performance,and the results showed that the designed tension sensor has high structural strength,high accuracy,good linearity and repeatability,which meets the demand for non-destructive measurement of the tension of the parachute lifting belt.