Rapid focus measurement system and method for actual sound field of water immersion type focused ultrasonic transducer

A technology of focusing ultrasound and transducers, which is applied in the direction of measuring ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc. It can solve the problems of low efficiency in determining the focus, time-consuming cost and resource cost, etc., to reduce time cost and Effects of resource cost, number reduction, and sound field test time saving

Inactive Publication Date: 2019-03-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a fast focus measurement system and method for the actual sound field of a water-immersed focused ultrasonic transducer, so as to solve the problem that the efficiency of determining the focus in the real-time sound field in the prior art is not high, resulting in a large amount of time, cost and resources cost problem

Method used

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  • Rapid focus measurement system and method for actual sound field of water immersion type focused ultrasonic transducer
  • Rapid focus measurement system and method for actual sound field of water immersion type focused ultrasonic transducer
  • Rapid focus measurement system and method for actual sound field of water immersion type focused ultrasonic transducer

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Embodiment 1

[0050] Please refer to figure 1 , which is a structural schematic diagram of a rapid focusing system for the actual sound field of the water-immersed focused ultrasonic transducer of the present invention. Such as figure 1 As shown, the rapid focusing system of the actual sound field of the water-immersed focused ultrasonic transducer includes: a water-immersed focused ultrasonic transducer 1, a PVDF needle hydrophone 2, a coordinate positioning system 3, and an ultrasonic sound field simulation module 4 and the measurement path planning module 5, the water-immersed focused ultrasonic transducer 1 is used to convert the input electric power into ultrasonic waves (the principle of the water-immersed focused ultrasonic transducer 1 is to use the acoustic lens principle or curved piezoelectric The chip converges the ultrasonic beam, so that the sound energy is highly concentrated, and can be applied to medical diagnosis and treatment and industrial flaw detection), and all conve...

Embodiment 2

[0065] This embodiment also provides a fast focusing method for the actual sound field of the water-immersed focused ultrasonic transducer. Refer below figure 1 and figure 2 The fast focusing method of the actual sound field of the water-immersed focused ultrasound transducer described in this embodiment will be described in detail.

[0066] First, step S1 is performed, using the coordinate positioning system 3 to adjust the water-immersed focused ultrasonic transducer 1 to a coaxial state with the PVDF needle hydrophone 2, and place the two water paths at a standard test distance (focus or near field length);

[0067] Next, execute step S2, use the ultrasonic sound field simulation module 4 to simulate and observe the ideal sound field of the water-immersed focused ultrasonic transducer 1 under different parameters, and initially plan the sound field scanning range;

[0068]Then, step S3 is executed, and the measurement path planning module 5 is used according to the curr...

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Abstract

The invention provides a rapid focus measurement system and method for an actual sound field of a water immersion type focused ultrasonic transducer. The rapid focus measurement system for the actualsound field of the water immersion type focused ultrasonic transducer comprises an ultrasonic sound field simulation module and a measurement path planning module. According to the current sound fielddistribution condition of the water immersion type focused ultrasonic transducer and the instantaneous sound pressure value around a current measurement point, a path optimization algorithm is used in a sound field scanning range to calculate and obtain an optimal path for sound field scanning, and the optimal path is used as a planned measurement path to carry out rapid focus measurement of an actual sound field ultrasonic focus. Since the process of determining the focus in the real-time sound field is to perform scanning by planning the optical path of sound field scanning step by step based on the instantaneous sound pressure value around the current measurement point; compared with the traditional grid scanning method, the method has the advantages that the number of sound pressure measurement points can be reduced, the sound field test time is effectively saved, and the time cost and the resource cost are reduced.

Description

technical field [0001] The invention relates to the technical field of the ultrasonic industry, in particular to a fast focusing system and method for the actual sound field of a water-immersed focused ultrasonic transducer. Background technique [0002] Water-immersed focused ultrasonic transducer is an ultrasonic transducer that uses the principle of acoustic lens or curved piezoelectric wafer to converge ultrasonic beams to make the sound energy highly concentrated. It uses a certain thickness of water layer as a coupling agent, and is usually used in related biomedicine Diagnosis and treatment or industrial flaw detection and other fields. Compared with other detection methods, its advantages can eliminate the influence of the sound beam generated during direct contact, make the emission and reception of sound waves tend to be stable, the coupling is stable, the detection results are repeatable, and it is conducive to improving the detection speed. [0003] In the focal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 梁丽云孙俊峰郭晓莉刘凯童善保
Owner SHANGHAI JIAO TONG UNIV
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