| 基于ACTRAN的超声聚能器声场辐射仿真研究 |
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| 引用本文：东 鑫 渊.基于ACTRAN的超声聚能器声场辐射仿真研究[J].计算技术与自动化,2021,(2):31-35 |
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| 中文摘要:设计了一种超声聚能器，旨在解决超声预警避障系统在远程测距中因超声波能量分散和衰减过快导致的回波信号难以识别问题。首先根据声学理论分析了超声聚能器可以通过改善阻抗匹配提高其辐射效率；再利用贝塞尔函数分析了超声聚能器影响声源指向性的重要设计参数，通过改变声源频率，聚能器开口面积等设计参数可以使指向性尖锐，能量更集中；ACTRAN有限元仿真软件模拟声场辐射云图及相应的实验均证明了理论分析的正确性以及优化聚能器设计参数对提高超声探测距离的有效性与可控性。 |
| 中文关键词:超声聚能器 阻抗匹配 贝塞尔函数 ACTRAN声场辐射 |
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| Simulation of Acoustic Field Radiation of Ultrasonic Focuser Based on ACTRAN |
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| Abstract:Designing a kind of ultrasonic resonator, in order to solve the problem of ultrasonic sensor energy dispersive and fast attenuation, which lead to the echo signals are difficult to be identified. Firstly, according to the theory of acoustics proves that the ultrasonic resonator can improve impedance match and radiant efficiency. Then, using the Bessel function points out important design parameters, which affect directivity of sound source, by changing the design parameters such as sound source frequency, opening area of resonator make the directivity sharp and energy centralized. Using ACTRAN finite element simulation software to simulate sound field radiation cloud map and experimental show that the theoretical analyses are correct, and the effectiveness and controllability of optimum design parameters for improve the ultrasonic detecting distance. |
| keywords:ultrasonic focuser impedance match Bessel function ACTRAN sound field radiation |
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