2021 Fiscal Year Final Research Report
Study on High-Precision Doppler Flow Measurement in a Soft Tube Using an Encoded Aperture Ultrasonic Probe
| Project/Area Number |
19K04409
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21030:Measurement engineering-related
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| Research Institution | Wakayama University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 超音波 / 流量計速 / パルスドップラ / 符号化開口 / 高分子圧電材料 / 超音波撮像 |
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| Outline of Final Research Achievements |
In order to measure liquid velocity distribution in a small-diameter plastic tube, we developed an M-sequence encoding stacked ultrasonic probe with a curved aperture that can be placed directly on the side of the tube using PVDF piezoelectric polymer films. By combining this probe with the pulsed Doppler method, we demonstrated that it is possible to detect the position and measure the moving velocity of a point object.
On the other hand, an M-sequence encoded linear array ultrasonic probe, using a polymer piezoelectric film, was also developed to visualize the distribution of bubbles in a fluid flowing in a tube. Assuming ultrasonic imaging a cross-section of a tube, the probe was bent and set around the circumference of a circular imaging area to image a point object. As a result, it was demonstrated that it is possible to image an object in the circular area with a single transmission/reception without scanning.
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| Free Research Field |
超音波応用計測，非破壊検査
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| Academic Significance and Societal Importance of the Research Achievements |
フレキシブルな開口を持った超音波探触子や空間選択性を有する超音波探触子を応用することで，これまで超音波計測が困難な対象にも適用を可能とするだけでなく，超音波撮像システムの高性能化をより簡便なシステムで実現できる可能性がある．本研究で，小径軟質チューブの流量計速を高精度に行うシステムの構築に向けて前進できた点や超音波計測システムの低コスト化をはかれる点では社会的意義があり，高分子圧電膜の特性をこれまでと違った方向から応用する研究は学術的にも意義があると考える．
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