Article
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Preserved in Portico This version is not peer-reviewed
Wireless Readout of Multiple SAW Temperature Sensors
Version 1
: Received: 19 June 2019 / Approved: 20 June 2019 / Online: 20 June 2019 (17:56:06 CEST)
A peer-reviewed article of this Preprint also exists.
Bruckner, G.; Bardong, J. Wireless Readout of Multiple SAW Temperature Sensors. Sensors 2019, 19, 3077. Bruckner, G.; Bardong, J. Wireless Readout of Multiple SAW Temperature Sensors. Sensors 2019, 19, 3077.
Abstract
It is since long known, that SAW devices, resonators as well as delay lines, can be used as passive wireless sensors for physical quantities like temperature and pressure as well as gas sensors or ID-Tags. The sensors are robust, work passively without battery, can be applied at high temperatures and provide a high resolution. Nevertheless, if the devices should be readout wirelessly in an industrial environment, several constraints have to be taken into account, especially when more than one quantity or device needs to be measured at the same time. The paper addresses the challenges that have to be tackled when establishing multi-sensor-wireless-readout for industrial applications. Major issues here are the legal ISM-band regulations, as well as sampling time and costs, which impose severe restrictions to any system design. We describe several design approaches and their constraints. We have successfully designed sensors based on reflective delay lines that allow the parallel readout of four independent temperature sensors in the 2.45 GHz ISM-band. These devices have been fabricated, positively tested and demonstrate the applicability of SAW sensors for industrial applications.
Keywords
SAW; sensors; wireless; delay lines; industrial application; 2.45GHz
Subject
Physical Sciences, Applied Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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