An Ultra Low Power Tongue Drive System for Paralyzed Patients
This paper presents an ultra low power multi-sensor Tongue Drive System (TDS) used for individuals with severe disabilities to control their environment using their tongue movement. An ultra low power local processor is proposed which can perform all processing at sensor side, rather than sending all raw data out. The proposed TDS will significantly reduce the transmission power consumption and subsequently increase the battery life. Assuming the TDS user on average issuing one command/s, implementing the computational engine reduces the data volume that needs to be wirelessly transmitted to a PC or smartphone by a factor of 1500x, from 12 kb/s to approximately 8 b/s. The proposed design is implemented on an ultra low-power IGLOO nano field-programmable gate array (FPGA) and is tested on AGLN250 prototype board and consumes 1.86 mJ power. Also, application specific integrated circuit (ASIC) post-layout simulation in a 65-nm CMOS results in a 15x power saving compared to FPGA. The detection accuracy is 93.22%.