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Two-Dimensional Airborne Position and Velocity Measurements Using a Pair of Linear-Period-Modulated Ultrasonic Waves

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This paper proposes an idea for position and velocity measurements for a moving object with the echolocation technique under the ultrasonic system. The moving-object location is based on the time-of-flight (TOF). Cross correlation, low-calculation-cost Doppler-shift compensation, plays an important role in the TOF determination. The over-sampling cross-correlation function is obtained from single-bit signal processing. The velocity of the moving object is determined from the peak interval and peak form in the cross-correlation function. Linearperiod-modulated (LPM) ultrasonic waves are employed to support the influence of the Doppler effect. In this paper, the ultrasonic two-dimensional position and velocity vector measurement exploits two microphones. The validity of this paper is experimentally evaluated.
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Document Type: Research Article

Publication date: 01 July 2016

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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