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In this paper we describe a wireless sensor system for measuring the spatially resolved pressure of the tongue against the upper palate. The system consists of eight piezoresistive absolute pressure sensors, a signal conditioning and data acquisition electronics, a wireless transceiver module and a LiPo-battery. A novel encapsulation protects the sensing elements during the manual mounting process, while taking into account the sensibility of the tongue. The implemented technique of switched excitation voltage to reduce the power consumption of the sensors by 97 % is discussed. The design of the signal conditioning and data acquisition electronics is presented. Tongue pressure is sampled with 30 Hz per sensor and with a resolution of 0.25 mbar. The sensor systems overall power consumption with working transceiver is 56 mW, enabling a running time of more than two hours out of the integrated 60 mAh LiPo-battery. First measurement results of the working sensor system in the oral cavity are given.

D6.3 - Wireless Sensor System for Monitoring Spatially Resolved Tongue Pressure