Present Electronic Travel Aids for the blind use either ultrasound or laser as the sensing device. They also provide an absolute reference relative to the user which may not be the best way of interpreting the environment This proposal will investigate the use of an alternate sensor, microwave, and presentation of the environment using a Doppler signal. Doppler may be a better method of displaying the environment because only potential hazards are displayed to the user. The proposed device may be best used as a situational aid for crossing busy motor vehicle traffic intersections. There are no references to Doppler signals being used or having been investigated for use by blind persons. Contact with several recognized leaders in this field indicate that a properly presented Doppler signal may have potential. In addition, current ETA's are very expensive ($650 to $3000). A microwave system using microstrip technology could be compact yet cost hey* than $250.Anticipated Results and
Potential Commercial Applications: Phase 1 Phase 1 will determine the usability of a Doppler signal In an electronic travel aid. The system will provide aural indications of the environment and will detect objects moving within the environment which may be a threat to the individual. Successful completion of this project will mean an alternative sensor for blind people that will enhance their present capabilities. Phase II will investigate the best application of the potential technologies developed in Phase I. It is anticipated that success in this area will result in a device acceptable to blind people. Alternate methods of interfacing the data provided by the radar device will be investigated. For example, rather than an aural input through a headset, electrical or vibratory impulses to specific area on a persons back may be more easily interpreted. This technology will have application well beyond use by blind individuals in manufacturing, autonomous land vehicles, security devices, and night vision devices.Key Words: Microwave Microstrip, Electronic Travel Aid, Orientation and Mobility, Blind Rehabilitation, DopplerTopic 5: Adaptations for Visually Impaired Disabled Individuals
