Design of high-intensity ultrasonic sound intensity measurement based on narrow pulse method
The research on high-intensity ultrasonic has taken the delectable achievement in the treatment of cancer and the detection of internal structure for the dam. The rapid and accurate sound intensity measurement of high-intensity ultrasonic transducer is necessary for its application and generalization. The paper introduces the principle of sound intensity measurement, proposes measurement scheme on the basis of the narrow pulse method and also discusses the design of hardware circuit and software.
Sound intensity measurement in focal region of HIFU transducer adopting narrow-pulse method
To meet the requirement for more efficient and convenient method of high-intensity focused ultrasound (HIFU for short) sound field measurement, which is propelled by the development of HIFU therapy, this paper theoretically discusses the feasibility to measure the focal region sound intensity of HIFU transducer by hydrophone method that uses narrow modulated wave as inspiring signal. It is proved through experiments to be a quick, efficient, safe and reliable method for the measurement of HIFU sound intensity.
Design of concave cone reflector for HIFU ultrasonic transducer power measurement
In measuring ultrasonic power of HIFU transducers, absorbing targets are often used. Cone reflectors are generally employed in measurements of high ultrasonic power using radiation pressure methods. This paper presents the relationship between parameters of the cone reflector and a focused transducer. It is the bases of the target design. In this discussion, effects of the reflector material and its thickness on the measurements are not taken into account.