An Electromagnetic Sensor Prototype to Assist Visually Impaired and Blind People in Autonomous Walking

Insight on Electronic Travel Aids for Visually Impaired People: A Review on the Electromagnetic Technology

“…Solutions employing 24 GHz radars based on FMCW modulation are presented in [21][22][23], but different choices were made concerning the way the users employ the devices. The clinical investigation was implemented during an observation period of two weeks, using the electromagnetic aid during everyday activities.…”

“…Solutions employing 24 GHz radars based on FMCW modulation are presented in [21][22][23], but different choices were made concerning the way the users employ the devices. For both graphs in Figure 6, the answers recorded on the X-axes are: (1) not at all, (2) not much, (3) to some extent, (4) significantly, (5) very significantly.…”

“…In the results, 92% of the participants stated that the perception of the surrounding environment was enhanced by the electromagnetic aid, whereas 80% noticed an increased confidence in independent mobility. Solutions employing 24 GHz radars based on FMCW modulation are presented in [21][22][23], but different choices were made concerning the way the users employ the devices.…”

“…The behavior of the entire system was simulated using computer-aided design (CAD), with preliminary results obtained from newly designed transmitting and receiving antennas. The first experimental activity using the microwave cane is outlined in [23].…”

“…Most aids are radar-based systems, where the frequency-modulated continuous wave (FMCW) is the typical mode of operation [19][20][21][22][23][24][25]. In a FMCW radar, the information about the target is contained in the frequency of the received signal.…”