A NEW METHOD FOR HIGH RESOLUTION ULTRASONIC RANGING IN AIR |
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| R. Queirós, R.C. Martins, P.S. Girão, A.Cruz Serra |
- Abstract:
- This paper presents a new method for ultrasonic ranging. It consists on continuously transmitting a signal composed by multiple sine wave segments, each containing an integer number of periods. The frequency of each segment is different from the adjacent segments, but close to the transducer resonant frequency, to minimise the filtering effects of the system. The transmitted and received signals are cross-correlated to determine the time-of-flight (TOF). Parabolic interpolation on the cross-correlation’s magnitude is used to increase the accuracy of TOF estimation. High measurement resolutions and good noise immunity is achieved.
- Keywords:
- ultrasonic ranging, cross-correlation, time-of-flight
- Download:
- PWC-2006-TC4-028u.pdf
- DOI:
- -
- Event details
- Event name:
- XVIII IMEKO World Congress
- Title:
Metrology for a Sustainable Development
- Place:
- Rio de Janeiro, BRAZIL
- Time:
- 17 September 2006 - 22 September 2006