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- W2000178765 abstract "Abstract A new type of highly-directional ultrasonic range sensor is designed, fabricated, and tested in this paper. To improve directivity, the parametric acoustic array, a nonlinear effect of media between two intensive waves, is applied to an ultrasonic range sensor. Additionally, a new type of the stepped-plate transducer is applied for generating high amplitude waves consisting of two frequencies. The proposed transducer shows a half power beam width(HPBW) of 5° at 40 kHz that is much higher directivity than the general ultrasonic range spatial sensor (typically 20°). Therefore, this research shows the possibility to improve the resolution of the ultrasonic range sensor." @default.
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- W2000178765 date "2008-01-01" @default.
- W2000178765 modified "2023-09-25" @default.
- W2000178765 title "A HIGHLY-DIRECTIONAL ULTRASONIC RANGE SENSOR USING A STEPPED-PLATE TRANSDUCER" @default.
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- W2000178765 doi "https://doi.org/10.3182/20080706-5-kr-1001.02668" @default.
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