Dynamic photoelastic ultrasonic imaging method and system

• Main Authors: CHEN QIUYING, AN ZHIWU, YAN RAN, MAO JIE, HU ZHONGTAO, WANG XIAOMIN, LIAN GUOXUAN, WEN MENGGE, SONG BO, LENG TAO
• Format: Patent
• Language: Chinese; English
• Published: 06.04.2018
• Subjects: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING

The invention relates to a dynamic photoelastic ultrasonic imaging method and system. The system comprises a synchronous time-delay system, an ultrasonic emission system, an ultrasonic energy transducer, a parallel light beam generation unit, a polarizer, a sample placing point, a polarization analyzer, an imaging lens and a collection unit, wherein the sample placing point is positioned between the polarizer and the polarization analyzer and used to place an observation sample; the parallel light beam generation unit generates parallel light beams in uniform light-intensity distribution; thepolarizer and the polarization analyzer process the parallel light beams to obtain a light pulse signal of high signal to noise ratio; the imaging lens carries out imaging on the received light pulsesignal; and the collection unit realizes ultrasonic imaging by collecting light pulse signals passing the imaging lens for multiple times and overlapping the signals. Thus, the system sensitivity canbe improved substantially,