A. Rakshit and A. Chatterjee, “A microcontroller-based IR range finder system with dynamic range enhancement”, IEEESensors J. 10 (10), 1635-1636 (2010). [Web of Science]
 J. Chen, S.-J. Wu, Y.-H. Chen, J.-B. Duan, L.-A. Chiu, and Y.-P. Kang, “Semiconductor lasers in indication and measurement applications”, Proc. Photonics Global Conf. (PGC) 1, 1-3 (2010).
 T. Ueda, H. Kawata, T. Tomizawa, A. Ohya, and S. Yuta, “Visual information assist system using 3D SOKUIKI sensor for blind people, system concept and object detecting experiments”, Proc. 32nd Annual Conf. on IEEE Industrial Electronics 1, 3058-3063 (2006).
 V. Koval, O. Adamiv, and V. Kapura, “The local area map building for mobile robot navigation using ultrasound and infrared sensors”, Proc. IEEE Int. Workshop on Intelligent DataAcquisition and Advanced Computing Systems: Technology andApplications 1, 454-459 (2007).
 P. Misra, J. Sanjay, and O. Diethelm, “Improving the coverage range of ultrasound-based localization systems”, Proc. IEEEWireless Communications and Networking Conf. 1, 605-610 (2011).
 S. Hashino and R. Ghurchian, “A blind guidance system for street crossings based on ultrasonic sensors”, Proc. IEEE Int. Conf. on Information and Automation 1, 476-481 (2010).
 A. Kumar, R. Patra, M. Manjunatha, J. Mukhopadhyay, and A.K. Majumdar, “An electronic travel aid for navigation of visually impaired persons”, Proc. Third Int. Conf. on CommunicationSystems and Networks 1, 1-5 (2011).
 http://download.maritex.com.pl/pdfs/se/40str-16.pdf (accessed 14.02.2013).
 M.C. Perez, J. Urea, A. Hernandez, A. Jimenez, D. Ruiz, F.J. Alvarez, and C. De Marziani, “Performance comparison of different codes in an ultrasonic positioning system using DS-CDMA”, Proc. IEEE Int. Symposium on Intelligent SignalProcessing 1, 125-130 (2009).
 W. Gelmuda and A. Kos, “Piezoelectric ultrasonic sensors detection capabilities”, Proc. Electrotechnical Institute 57 (246), ISSN 0032-6216, 133-141 (2010).
 W. Gelmuda and A. Kos, “Vibrating bracelet interface for blind people”, Proc. Electrotechnical Institute 59 (260), ISSN 0032-6216, 199-206 (2012).
 S. Szczepański, M. Wojcikowski, B. Pankiewicz, M. Kłosowski, and R. Żaglewski, “FPGA and ASIC implementation of the algorithm for trafic monitoring in urban areas”, Bull. Pol. Ac.:Tech. 59 (1), 137-140 (2011). [Web of Science]
Bulletin of the Polish Academy of Sciences Technical Sciences
The Journal of Polish Academy of Sciences
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Multichannel ultrasonic range finder for blind people navigation
1Department of Electronics, AGH University of Science and Technology, 30 Mickiewicza Ave., 30-059 Kraków, Poland
This content is open access.
Citation Information: Bulletin of the Polish Academy of Sciences: Technical Sciences. Volume 61, Issue 3, Pages 633–637, ISSN (Print) 0239-7528, DOI: 10.2478/bpasts-2013-0067, October 2013
- Published Online:
The purpose of this paper is to present a multichannel ultrasonic range finder which was designed for the navigation system for blind people. A substantial number of consultations with blind people in the Blind People Centre in Krakow have shown that the navigation and obstacle detection with a help of a white stick only, is not sufficient enough to assure a high safety level. Electronic aids which are being designed for blind people should be mobile, comfortable and low-powered. That is why the MOBIAN© (a mobile safety system for the blind) project is being carried out by the authors to create a highly reliable safety navigation system for blind people. It could not only improve blind people quality of life but also their safety, especially when they are walking in unknown areas. As a part of this project, the multichannel ultrasonic range finder was designed, produced and tested. The tests have proven the device is capable of detecting objects from different directions in a range over 4 m. The device interface is easy to manage and can be controlled by almost any microcontroller or FPGA chip. The designed range finder is to be implemented in the electronic assistant project for blind people. Other systems, including the industrial ones, for instance, mobile robots or gates that count people entries, could benefit from this multichannel range finder. Usually, some low-cost ultrasonic range finders use two transducers for each channel (a transmitter and a receiver). The designed device employs only one transducer per channel which minimizes the end-device size and cost and at the same time provides with the main functionality. Novelty of this device is its multichannel design and the emplacement of the ultrasonic transducers, which can be used due to the application of the multichannel analog multiplexer. Thus, it is possible to detect obstacles, even the inclined ones, with higher reliability and increase the safety of blind people while walking. Also, this design and the transducers’ placement allow to detect obstacles much quicker, when the blind user suddenly turns.