Using unconstrained tongue motion as an alternative control mechanism for wheeled mobility.
Using unconstrained tongue motion as an alternative control mechanism for wheeled mobility.
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DOI：
10.1109/tbme.2009.2018632
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发表时间：
2009-06
期刊：
影响因子：
--
通讯作者：
Ghovanloo M
中科院分区：
文献类型：
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作者：
Huo X;Ghovanloo M
舌头驱动系统（TDS）是一种舌头操作的、微创的、不引人注目的、非接触的无线辅助技术，它通过检测和分类用户的舌头自主运动来推断用户的意图，并将其转换为用户定义的命令。我们已经开发了外部TDS （eTDS）原型和商业动力轮椅（PWC）之间的定制接口电路，以及三种控制策略来评估舌头运动作为轮式移动的替代控制输入。我们对12名健全的人类受试者进行了eTDS驾驶PWCs的性能测试，其中11名是新手。结果表明，所有受试者都能通过舌头运动操作普华永道完成导航任务。尽管缺乏经验，但使用eTDS和舌头的平均时间仅比使用操纵杆和手指的平均时间长约三倍。导航时间很大程度上依赖于发出命令的数量，而这个数量会随着经验的增加而减少。特别是，意外发出的指令（触点问题）很少，这证明了舌头跟踪和外部磁场抵消算法的有效性，以及TDS在轮式移动方面的安全性。
Tongue drive system (TDS) is a tongue-operated, minimally invasive, unobtrusive, noncontact, and wireless assistive technology that infers users’ intentions by detecting and classifying their voluntary tongue motions, and translating them to user-defined commands. We have developed customized interface circuitry between an external TDS (eTDS) prototype and a commercial powered wheelchair (PWC) as well as three control strategies to evaluate the tongue motion as an alternative control input for wheeled mobility. We tested the eTDS performance in driving PWCs on 12 able-bodied human subjects, of which 11 were novice. The results showed that all subjects could complete navigation tasks by operating the PWC using their tongue motions. Despite little prior experience, the average time using the eTDS and the tongue was only approximately three times longer than using a joystick and the fingers. Navigation time was strongly dependant on the number of issued commands, which reduced by gaining experience. Particularly, the unintended issued commands (the Midas touch problem) were rare, demonstrating the effectiveness of the tongue tracking and external magnetic field cancellation algorithms as well as the safety of the TDS for wheeled mobility.