4th joint meeting of the Acoustical Society of America and the Acoustical Society of Japan
開催地
和文:
英文:
Honolulu, Hawaii, U.S.A.
アブストラクト
Ultrasonic sensors are suitable for perception of the environment of mobile autonomous robots. Most bats use echolocation that is high-quality sensing system by their ultrasonic sensors. The echolocation can estimate the distance to the object, its relative velocity and its scale. But technological application of echolocation requires a large computational requirement because delay of the echo signal from the generated signal is estimated from cross-correlation between the generated signal and the echo signal. A new sensor signal processing for echolocation is proposed by using a delta-sigma modulated single-bit digital signal. A delta-sigma modulated single-bit digital signal is a single-bit high-speed data stream. Using delta-sigma modulated single-bit digital signal processing, multiply and accumulation of cross-correlation can be changed into logical-operations: EXOR, NOT, SUM. Simulations show the possibility of estimation of the distance to the object from correlation of the echo signal with the generated signal converted single-bit data stream, along with reduce computational and circuit-scale requirements.
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