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Measuring Torque and Temperature in a Rotating Shaft Using Commercial SAW Sensors

机译:使用商用SAW传感器测量旋转轴中的扭矩和温度

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Real-time monitoring of torque in a rotating shaft is not easy to implement with technologies such as optic fiber sensors or strain gages. Surface acoustic wave (SAW) sensors are wireless and passive and can be used to monitor strain in moving parts. Commercial solutions (sensors, antennas and interrogation unit) can easily be purchased from some companies; however, they are not customized and may not meet the specificity of the measurements. In order to evaluate the adequacy of commercial off-the-shelf (COTS) solutions, temperature and strain sensors fabricated by SENSeOR (Besan?on, France) were mounted on a load cell. The sensors were calibrated using a thermal chamber and a universal testing machine. The load cell was then assembled together with a steel shaft that rotated at different speeds inside an oven. The commercial antennas were replaced with an RF (radio frequency) coupler and the sensors were interrogated with the commercial interrogation unit. The influence of rotation in the accuracy on the measurements, as well as the adequacy of the sensors structure, was evaluated. It can be concluded that SAW sensors can be used to measure temperature or torque in a rotating environment; however, some customization of the components is required in order to overcome the limitations posed by COTS sensing solutions.
机译:使用诸如光纤传感器或应变计之类的技术难以实时监控旋转轴中的扭矩。表面声波(SAW)传感器是无线的和无源的,可用于监视运动部件中的应变。商业解决方案(传感器,天线和询问装置)可以很容易地从一些公司购买;但是,它们不是定制的,可能无法满足测量的特殊性。为了评估商用现货(COTS)解决方案的适当性,将由SENSeOR(法国Besan?on)生产的温度和应变传感器安装在称重传感器上。使用热室和通用测试机对传感器进行校准。然后将称重传感器与钢轴组装在一起,该钢轴在烤箱内以不同的速度旋转。商用天线被RF(射频)耦合器取代,传感器被商用询问单元询问。评估了旋转精度对测量的影响以及传感器结构的适当性。可以得出结论,声表面波传感器可用于测量旋转环境中的温度或扭矩。但是,为了克服COTS传感解决方案带来的限制,需要对组件进行一些自定义。

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