Microprocessor ultrasonic sonar for the blind people / Karol Kaczmarski, Zdzisław Juda, Grzegorz Milewski // W: Biomechanika '06 : Międzynarodowa Konferencja, 06-08 września 2006, Zakopane = Biomechanics' ... więcej

Microprocessor ultrasonic sonar for the blind people / Karol Kaczmarski, Zdzisław Juda, Grzegorz Milewski // W: Biomechanika '06 : Międzynarodowa Konferencja, 06-08 września 2006, Zakopane = Biomechanics' 06 : International Conference, 06-08 września 2006, Zakopane / red. Wojciech Wolański. – Gliwice : Wydaw. Katedry Mechaniki Stosowanej, 2006. – (Zeszyty Naukowe Katedry Mechaniki Stosowanej / Politechnika Śląska. Wydział Mechaniczny Technologiczny. Katedra Mechaniki Stosowanej ; 26). – S. 179-184 : fot., rys., schem. – Bibliogr. 6 poz., Summ. – ISBN 83-60102-35-X

Total or partial failure to see should not eliminate men's ability to move. One of the most important difficulties for the blind people is to pass or avoid various barriers while moving in the streets. ... więcej

Total or partial failure to see should not eliminate men's ability to move. One of the most important difficulties for the blind people is to pass or avoid various barriers while moving in the streets. In majority they use walking-sticks, which are limited to detect barriers laying on the ground. Other barriers like trees branches, platforms, low road signs, etc. generally are being detected to late. In order to help people who suffer that disability a system of sonar based on ultrasonic detection has been worked out. The system is applied mainly as an additional device useful for detecting barriers by space scanning on the height corresponding to men's trunk and head. Ultrasonic sensor of 40 kHz frequency and microcontroller as a basic part of the system have been applied to design and construct the device. The main function of the sonar is to calculate the time for ultrasonic wave to overcome the distance to the barrier and back as well as noise controlled signalling of barrier detection depending on it's settlement.