Title :
Ultrasonic Imaging Detective System Based on Spread Spectrum Technology
Author :
Cao Lina ; Guo Yinjing ; Lu Wenhong ; Yao Mingyuan ; Wang Zhengjie ; Sun Hongyu
Author_Institution :
Coll. of Inf. & Electr. Eng., Shandong Univ. of Sci. & Technol., Qingdao
Abstract :
In this paper introduce spared spectrum technology into ultrasonic imaging. Analyze how to modulate ultrasonic with the spread spectrum technology, introduce imagining restoration method, and then use this technology to detective the structure of five mine wells. Firstly, use pseudorandom codes to modulate ultrasonic signal before it is sent out, and then demodulate echo to obtain the time difference. Secondly, apply gradual linear iterative method and QR decomposition of least squares method to restore image. Analyze the image with computer we can obtain the structure of objects. Experiment verified introduce spared spectrum technology into ultrasonic imaging can improve the resolution and accuracy.
Keywords :
image coding; image restoration; iterative methods; modulation; random codes; ultrasonic imaging; QR decomposition; echo demodulation; gradual linear iterative method; image restoration; least squares method; mine wells; pseudorandom codes; resolution improvement; spread spectrum technology; ultrasonic imaging detective system; ultrasonic signal modulation; Equations; Image analysis; Image resolution; Image restoration; Modulation coding; Signal resolution; Spread spectrum communication; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.1582
