Range Finding and Surface Characterization Using High-Frequency Air Transducers
Range Finding and Surface Characterization Using High-Frequency Air Transducers
复制标题
使用高频空气传感器进行测距和表面表征
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
A. Fukumoto
中科院分区：
文献类型：
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作者：
T. Yano;M. Tone;A. Fukumoto
介绍了高频压电式空气换能器的设计和应用。利用新合成的声阻抗匹配层，设计和制造了两种厚度型空气换能器，其声阻抗低至0.3 Mrayls。与没有匹配层的传感器相比，这些传感器的插入损耗提高了32 ~ 45 dB。使用l-MHz双匹配层换能器进行测距，具有良好的射频脉冲响应，测量范围精度为0.1 mm数量级。对于固体物体的表面轮廓和缺陷测量，单匹配层聚焦换能器由于其焦斑直径小（1.3 mm）和测距精度（0.1 mm）而被认为是合适的。这里描述的其他应用是利用沿布表面传播并穿过布的声信号来分析布表面状态。上文提到的空气传感器。本文介绍了这些传感器的设计及其在测距、固体物体轮廓测量和布料表面状态测量中的应用。
The design and applications of high-frequency piezoelec- tric air transducers are described. Two types of thickness mode air transducers are designed and fabricated using newly synthesized acoustic matching layers with an acoustic impedance as low as 0.3 Mrayls. The insertion losses of these transducers are improved by 32- 45 dB compared to that of the transducer without a matching layer. Use of a l-MHz double matching layer transducer with a good RF pulse response for range finding has revealed that the measurement range accuracy is of the order of 0.1 mm. For surface profile and defect mea- surements of solid objects, a focused transducer with a single matching layer is found suitable due to its small focal spot diameter of 1.3 mm and range accuracy of 0.1 mm. Other applications described here are the analysis of a cloth surface state using the acoustic signals propa- gating along the cloth surface and passing through the cloth. air transducers mentioned above. This paper describes the design of these transducers and their applications to range finding, profile measurement of solid objects, and surface state measurement of cloth.