Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5485315 | Ultrasonics | 2017 | 10 Pages |
Abstract
A long-range measurement system comprising an ultrasonic range sensor with a high-power ultrasonic transmitter array in air was investigated. The system is simple in construction and can be used under adverse conditions such as fog, rain, darkness, and smoke. However, due to ultrasonic waves are well absorbed by air molecules, the measurable range is limited to a few meters. Therefore, we developed a high-power ultrasonic transmitter array consisting of 144 transmitting elements. All elements are arranged in the form of a 12Â ÃÂ 12 array pattern. The sound pressure level at 5Â m from the transmitter array was >30Â dB higher than that of a single element. A measuring range of over 25Â m was achieved using this transmitter array in conjunction with a receiver array having 32 receiving elements. The characteristics of the transmitter array and range sensor system are discussed by comparing simulation and experimental results.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Acoustics and Ultrasonics
Authors
Sahdev Kumar, Hideo Furuhashi,