AID DEVICE FOR BLIND PEOPLE

摘要

An aid device (100) for blind people comprising: one signal generator (1 ), one antenna (4) that picks up a reflected beam (S7) and converts it into an electrical signal (S8), one synchronism detector (6) that receives a first signal (S4) indicative of the electrical signal (S) from the generator and a second signal (S9) indicative of the electrical signal (S8) from the antenna, one analogue-digital converter (8) that converts into digital the signal mean values (S21, S22) from the synchronism detector (6), one processing unit (9) that saves in a memory (10) complex reflection coefficients (p(f)) for every scanning frequency (f) and makes an Inverse Fast Fourier Transform (IFFT) of the complex reflection coefficients (p(f)) to obtain a spatial reflection profile of the obstacle (5), and one user interface (12) to emit an alarm when said obstacle (5) is detected in the spatial reflection profile.