5 May 2011 Piezoelectric power generation for sensor applications: design of a battery-less wireless tire pressure sensor
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Abstract
An in-wheel wireless and battery-less piezo-powered tire pressure sensor is developed. Where conventional battery powered Tire Pressure Monitoring Systems (TPMS) are marred by the limited battery life, TPMS based on power harvesting modules provide virtually unlimited sensor life. Furthermore, the elimination of a permanent energy reservoir simplifies the overall sensor design through the exclusion of extra circuitry required to sense vehicle motion and conserve precious battery capacity during vehicle idling periods. In this paper, two design solutions are presented, 1) with very low cost highly flexible piezoceramic (PZT) bender elements bonded directly to the tire to generate power required to run the sensor and, 2) a novel rim mounted PZT harvesting unit that can be used to power pressure sensors incorporated into the valve stem requiring minimal change to the presently used sensors. While both the designs eliminate the use of environmentally unfriendly battery from the TPMS design, they offer advantages of being very low cost, service free and easily replaceable during tire repair and replacement.
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Noaman Makki, Noaman Makki, Remon Pop-Iliev, Remon Pop-Iliev, } "Piezoelectric power generation for sensor applications: design of a battery-less wireless tire pressure sensor", Proc. SPIE 8066, Smart Sensors, Actuators, and MEMS V, 806618 (5 May 2011); doi: 10.1117/12.887112; https://doi.org/10.1117/12.887112
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