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可折叠机器人是一种时髦的、可按需生产的机器人。使用者可将其折叠起来,送入其它形状无法进入的环境,然后再让机器人恢复形状、执行任务。问题在于,目前最复杂的折叠机器人需要配备电池和电线,因此沉重笨拙,从生物角度来看也不安全。如今,哈佛大学的研究人员找到了该问题的解决方法。他们设计出的可折叠机器人能够利用无线磁场进行控制。
为让这些机器人无需电池运作,研究人员在其关节处安装了两个元件:一是由形状记忆合金制成的线圈,在受热时可使机器人恢复原始形态;二是在特定磁共振频率下可产生电能的小型电路。
通过改变磁场频率,机器人可根据需求、将某个关节折叠起来,不会互相干扰。而如果叠加磁场,多个关节便可同时折叠。该研究团队展示了多种自由度,厘米级和毫米级均可实现。
“我们相信,此次研究体现了无线供电、无线控制的折叠机器人的可行性,”该研究作者指出,“该技术可用来研发无需电力存储或控制元件的可折叠医疗设备,在病人体内进行远程作业。”
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