研究定向移动装置的专家们在继续探索各种扶助伤残人独自行进的装置。这些助行装置之一的激光手杖,是几年前研制的。这种手杖使用了向三个方向发射红外脉冲的三台低功率激光器。当检测到一物体或一骤然下降的台阶时,就通过声音信息或触觉刺激来警告使用人。为了满足患有多种残疾的盲人的需要,宾夕法 Experts who study directional mobile devices continue to explore various devices that help disabled people go alone. A laser cane, one of these walking aids, was developed a few years ago. This cane uses three low-power lasers that emit infrared pulses in three directions. When an object or a suddenly descending step is detected, the user is warned by sound information or tactile stimulation. In order to meet the needs of blind people with multiple disabilities, Pennsylvania