我们已设计了一种采用微处理器和超声装置的盲人助行器,基于精神生理上的实验可对此助行器进行评估。在该模型中,为探测障碍物,一个具有广角特征的传送阵列产生一下扫的调频超声信号,从障碍物返回的超声回波被一双通道接受器所采集,其所产生的超声频率在1ms内从70KHz扫到40KHz,它几乎与蝙蝠在回声定位法 We have devised a blind walker with microprocessors and ultrasound devices that can be evaluated on a psychophysical basis. In this model, a transmission array with a wide-angle feature produces a swept-frequency ultrasound signal to detect obstacles. The ultrasound echoes returned from the obstacle are captured by a dual-channel receiver that produces ultrasound frequencies within 1 ms Swept from 70KHz to 40KHz, it’s almost the same with bats in echolocation