办事指南

Patents : Sound guidance

点击量:   时间:2017-11-13 04:02:05

By Barry Fox A guidance system for people who are blind has been developed from technology designed to prevent shoplifting by Sunny Sealing of Tokyo (GB 2 313 520). In shops, radio detectors cause an alarm to go off if someone tries to remove something containing an electronic label. In the guidance system, the labels, or transponders, are stuck to walls and floors to mark routes in a building. Blind people would carry a tiny radio transmitter, possibly mounted in their sticks, that causes the transponders to produce an echo. Different labels respond at different frequencies,