Two-dimensional control and ultrasonic imaging monitoring method for flowing micro-bubbles in non-free field

Abstract

The invention discloses a two-dimensional control and ultrasonic imaging monitoring method for flowing micro-bubbles in a non-free field. The two-dimensional control and ultrasonic imaging monitoring method for flowing micro-bubbles in the non-free field comprises the steps of: arranging two control ultrasonic energy converters and a pipeline in a controlled region reasonably to determine relative spatial positions of the two control ultrasonic energy converters and the pipeline; propelling a micro-bubble suspension liquid in a sound-transmitting pipe, starting up the control ultrasonic energy converters, exciting the control ultrasonic energy converters by using continuous sine electric signals, adjusting an excitation electric signal power and changing resultant force applied to a micro-bubble group in the vertical direction to control the micro-bubbles to move in the vertical direction; enabling the micro-bubbles to move in the horizontal direction by changing phase position or frequency of the excitation electric signal; placing an ultrasonic array energy converter to a position where the micro-bubble group control process can be monitored and generating a micro-bubble group wavelet conversion ultrasonic monitoring image. According to the two-dimensional control and ultrasonic imaging monitoring method for flowing micro-bubbles in the non-free field, two-dimensional control of flowing micro-bubbles in the non-free field of a single-side sound-transmitting medium under ultrasonic monitoring can be realized, and sensitivity of micro-bubble monitoring is improved.

Description

technical field [0001] The invention belongs to the fields of ultrasonic physics and ultrasonic instruments as well as the field of ultrasonic detection and control, and particularly relates to a two-dimensional control and ultrasonic imaging monitoring method of microbubbles flowing in a non-free field. Background technique [0002] In recent years, the acoustic radiation force manipulation of microbubbles in non-free fields in unilateral sound-transmitting media has been paid attention to in the fields of biomedical ultrasound and ultrasonic scientific instruments. At present, the acoustic radiation force manipulation of microbubbles in one-sided acoustically transparent media is mainly based on traveling waves. Usually, this method uses the acoustic radiation force generated by multi-period low-sound pressure pulse waves to push the microbubbles to the side of the tube wall away from the sound source, while avoiding the rupture of the microbubbles; some scholars also try ...

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