Surface acoustic wave sensors offer overwhelming advantages over other potentially competitive sensing technologies in\nrotating mechanical structures for their wireless and passive capability. Nevertheless, the challenges of using these sensors\nhave not been adequately addressed. Radio frequency signal of surface acoustic wave sensors acts as not only the\nrole of data transmission but also the role of energy supply during the sensing system working process. Thus, the performance\nof surface acoustic wave sensors when they are used to monitor rotating spindles should be investigated due to\nthe harsh metallic environments for radio propagation in machine tool. This article aims to experimentally study the performance\nof surface acoustic wave sensors on both rotating spindle with Computer Numerical Control machine tool\nand self-developed spindle apparatus. The measurement study is performed using a temperature surface acoustic wave\nsensor working in the Industrial Scientific and Medical (ISM) band (433.05ââ?¬â??434.79MHz). Experimental results have\nshown that transmission and measurement characteristics were closely depended on the surface acoustic wave sensor\ninstallation location and rotation speeds. The conclusions will directly guide the sensor location optimization, power setting,\nerrors avoidance, or correction in the future work.
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