期刊
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
卷 59, 期 12, 页码 3227-3236出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIM.2010.2047305
关键词
Cross correlation; sine fitting; time of flight (TOF) and phase-shift (PS) estimation; ultrasonic ranging
资金
- Portuguese Research Project [POSC/EEA-ESE/60397/2004]
- Fundação para a Ciência e a Tecnologia [POSC/EEA-ESE/60397/2004] Funding Source: FCT
This paper presents a combination of two techniques for high-resolution ultrasonic distance measurements in air. The first is the cross correlation between transmitted and received signals to determine the time of flight (TOF), and the second is sine fitting of other transmitted and received signals to determine the phase shift (PS) between them. Sine fitting can estimate the PS with very high accuracy. The result of this synergy is a very accurate distance measurement. For example, the final uncertainty is less than 100 mu m for distances up to 1200 mm.
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