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Sensors 2011, 11(12), 11464-11475; doi:10.3390/s111211464

Ultrasonic Array for Obstacle Detection Based on CDMA with Kasami Codes

Electronics Department, University of Alcalá de Henares, Campus Universitario. Ctra. Madrid-Barcelona Km. 33.600, Madrid 28805, Spain
Electrical Engineering Electronics and Automatics Department, University of Extremadura, Avda. de Elvas s/n, Badajoz 06071, Spain
Author to whom correspondence should be addressed.
Received: 20 October 2011 / Revised: 21 November 2011 / Accepted: 21 November 2011 / Published: 2 December 2011
(This article belongs to the Special Issue Sensorial Systems Applied to Intelligent Spaces)
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This paper raises the design of an ultrasonic array for obstacle detection based on Phased Array (PA) techniques, which steers the acoustic beam through the environment by electronics rather than mechanical means. The transmission of every element in the array has been encoded, according to Code Division for Multiple Access (CDMA), which allows multiple beams to be transmitted simultaneously. All these features together enable a parallel scanning system which does not only improve the image rate but also achieves longer inspection distances in comparison with conventional PA techniques.
Keywords: ultrasound; Phased Array; CDMA; B-Scan images ultrasound; Phased Array; CDMA; B-Scan images

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Diego, C.; Hernández, Á.; Jiménez, A.; Álvarez, F.J.; Sanz, R.; Aparicio, J. Ultrasonic Array for Obstacle Detection Based on CDMA with Kasami Codes. Sensors 2011, 11, 11464-11475.

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