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目的:旋转和高速运动机械结构的状态监测因缺少有效的技术手段而成为制约其性能提升的关键因素。声表面波传感实现了传感器的无线和无源化,有望解决上述难题。本文旨在研究复杂制造环境中金属件和旋转运动对声表面波传感器通信性能的影响,为其应用提供理论基础和技术参考。创新点:1.揭示了金属件和传感器之间不同相对位置和距离对传感系统测量和通信性能的影响;2.分析了机械结构旋转运动中影响传感系统通信性能的因素,为传感器结构设计和配置优化提供了参考依据。方法:1.通过仿真计算,研究金属件对声表面波传感系统的影响;2.实验研究金属环境及旋转运动中影响声表面波传感系统通信性能的关键因素。结论:1.金属环境对声表面波传感系统有重要影响,传输天线下方的金属能够增强系统传输功率,但平行于天线附近的金属会削弱传输功率;2.质询器天线与传感器天线的相对夹角对传感器通信性能有重要影响;3.安装位置对传感器测量性能和信号传输功率均有显著影响;4.动态实验证明了声表面波传感系统应用于主轴温度监测的可行性。
Aims: Condition monitoring of rotating and high-speed mechanical structures is a key constraint to performance improvement due to the lack of effective technical means. SAW sensor wireless and passive sensors, is expected to solve the above problems. The purpose of this paper is to study the influence of metal parts and rotating motion on the communication performance of SAW sensors in complex manufacturing environment, and provide the theoretical basis and technical reference for its application. Innovative points: 1. Reveal the different relative position and distance between metal parts and sensors on the sensor system measurement and communication performance; 2. Analysis of the mechanical structure of the rotational motion affecting the sensor system communication performance factors for the sensor structure Design and configuration optimization provides a reference. The influence of metal parts on SAW sensing system is studied through simulation calculation. 2. The key factors affecting the communication performance of SAW sensor system in metal environment and rotation are experimentally studied. Conclusions: 1. The metal environment has an important influence on the SAW sensing system. The metal under the transmission antenna can enhance the transmission power of the system, but the metal parallel to the antenna will weaken the transmission power. 2. The relationship between the interrogator antenna and the sensor antenna The included angle has an important influence on the communication performance of the sensor; 3. The installation position has a significant influence on the measurement performance of the sensor and the signal transmission power; 4. The dynamic experiment proves the feasibility of the surface acoustic wave sensing system applied to the spindle temperature monitoring.