Sound intensity and acoustical power measurement method of high-strength focused ultrasound

A technology of focused ultrasound and measurement method, applied in the measurement of ultrasonic/sonic/infrasonic waves, measurement devices, instruments, etc., can solve the problems of increased measurement cost, hydrophone damage, high sound pressure, etc., to achieve simple implementation, sensor protection, Computationally efficient effects

Pending Publication Date: 2017-06-09
CHINA JILIANG UNIV
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Problems solved by technology

However, due to the energy convergence of the focusing transducer, the sound pressure at the focal point is relatively high, and direct hydrophone measurement in the focal area will cause irreparable damage to the hydrophone and increase the measurement cost

Method used

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  • Sound intensity and acoustical power measurement method of high-strength focused ultrasound
  • Sound intensity and acoustical power measurement method of high-strength focused ultrasound
  • Sound intensity and acoustical power measurement method of high-strength focused ultrasound

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Embodiment

[0080] The focusing transducer has a diameter of 120mm and a resonance frequency of 1.27MHz. The hydrophones are warehouse-type hydrophones from Onda Company. Select the focal point, 10mm in front of the focal point and 10mm behind the focal point for the above measurement, see Figure 10-Figure 12 , D represents the distance in the three-dimensional diagram of the sound intensity distribution, and I represents the sound intensity. In this experiment, △z was taken as 0.1mm respectively. The measurement range at the focal plane is 20mm*20mm, the scanning space interval △d is 0.2mm, the range of the pre-focus plane is 30mm*30mm, and the space interval △d is 0.3mm.

[0081] The sound power at the three places is:

[0082] Location Radiated sound power of transducer (w) 10mm before focus 12.4894w focal point 11.585w 10mm after focus 11.1027w

[0083] Under the same conditions, the radiation sound power measured by the radiation force balance r...

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Abstract

The present invention relates to a sound intensity and acoustical power measurement method of the high-strength focused ultrasound. The sound intensity and acoustical power measurement method of the present invention is characterized by selecting two mutually parallel first and second planes in a pre-focusing area of the high-strength focused ultrasound to measure, and using a PC to control a hydrophone to scan the sound pressure data on the first plane, and then using a servo motor to control the hydrophone to move along a Z direction accurately, repeating the above control and acquisition processes, and obtaining the sound pressure data on the second plane. The sound intensity and acoustical power measurement method of the high-strength focused ultrasound of the present invention has the remarkable characteristics of being simple and convenient to implement, efficient and accurate to calculate, etc., avoids measuring in a focusing area, can protect a sensor furthest, can obtain a plurality of parameters, such as the sound intensity distribution, etc., while obtaining the acoustical power, facilitates evaluating the performances of a focusing transducer comprehensively, and is suitable for measuring the radiation acoustical powers of various focusing transducers.

Description

technical field [0001] The invention belongs to the field of acoustics, and in particular relates to a method for measuring high-intensity focused ultrasonic sound intensity and sound power. Background technique [0002] High-intensity focused ultrasound (HIFU) technology originated in the 1940s, when its development was affected by the lack of high-precision imaging and positioning technology. With the development of imaging and positioning technology in recent years, high-intensity focused ultrasound has become a research hotspot in the field of medical engineering. HIFU surgery is to gather low-intensity ultrasound outside the body into the body through some focusing means (acoustic lens, concave spherical self-focusing, electronic focusing, etc.) to form high-intensity focused ultrasound. It is a new method that uses the thermal effect, mechanical effect and cavitation effect of ultrasound to achieve the purpose of inactivating tumor tissue instantly (0.5-2s) without da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 王月兵蒋剑郑慧峰于群曹文旭曹永刚郭世旭赵鹏
Owner CHINA JILIANG UNIV
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