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蝙蝠拐杖 盲人出门时即使手拿拐杖也感不便。他们羡慕蝙蝠,在黑暗中也能自由飞行。不过,如今他们也能像蝙蝠一样自由行走了。因为英国科学家研制了“蝙蝠拐杖”。 蝙蝠在黑暗中能自由飞行,靠的不是眼睛,而是它发出的超声波,超声波碰到物体后反射回来,蝙蝠就不会碰到障碍物了。英国利兹大学的研究人员从中得到启发,研制出“蝙蝠拐杖”。这种拐杖能发出一种人耳听不见的声波,帮助拐杖使用者探测障碍。拐杖的塑料柄上有4个接收器,哪个方向有障碍物,哪边的接收器就会产生震荡,使用者就知道障碍物的方位。障碍物远,震荡就弱;如果离得很近,震荡就加快,使用者可及时避开。 英国有140万盲人,“蝙蝠拐杖”可以让他们对周围的环境形成一个“脑中地图”,这样他们就可以在马路上自由行走了。
Bat crutches Blind people feel inconvenienced even when walking with their crutches. They admire the bats and fly freely in the darkness. However, they are now free to walk like bats. Because British scientists developed a “bat crutches.” The bat can fly freely in the darkness, not by eyes, but by the ultrasonic waves it emits. When the ultrasonic waves hit an object and reflects back, the bats do not encounter obstacles. Researchers at the University of Leeds in the United Kingdom have been inspired to develop “bat crutches.” Such crutches send out a sound wave that can not be heard by the human ear and help the user of the walking stick to detect obstacles. Crutches plastic handle on the 4 receivers, which direction there are obstacles, which side of the receiver will produce shock, the user will know the direction of obstacles. Obstructions far, the shock is weak; if it is close, the shock to speed up, users can avoid in time. With 1.4 million blind people in the UK, “bat crutches” give them a “brain map” of the surroundings so they can walk freely on the road.