Ultrasonic Array for Obstacle Detection Based on CDMA with Kasami Codes

Sensors

Cristina Diego²  Álvaro Hernández²  Ana Jiménez²  Fernando J. Álvarez¹  Rebeca Sanz² 

[1] Electrical Engineering Electronics and Automatics Department, University of Extremadura, Avda. de Elvas s/n, Badajoz 06071, Spain; E-Mail:;Electronics Department, University of Alcalá de Henares, Campus Universitario. Ctra. Madrid-Barcelona Km. 33.600, Madrid 28805, Spain; E-Mails:

关键词: ultrasound;    Phased Array;    CDMA;    B-Scan images;   

DOI  :  10.3390/s111211464

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.