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Optical Engineering

Spatial filtering self-velocimeter for vehicle application using a CMOS linear image sensor
Author(s): Xin He; Jian Zhou; Xiaoming Nie; Xingwu Long
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Paper Abstract

The idea of using a spatial filtering velocimeter (SFV) to measure the velocity of a vehicle for an inertial navigation system is put forward. The presented SFV is based on a CMOS linear image sensor with a high-speed data rate, large pixel size, and built-in timing generator. These advantages make the image sensor suitable to measure vehicle velocity. The power spectrum of the output signal is obtained by fast Fourier transform and is corrected by a frequency spectrum correction algorithm. This velocimeter was used to measure the velocity of a conveyor belt driven by a rotary table and the measurement uncertainty is ∼0.54%. Furthermore, it was also installed on a vehicle together with a laser Doppler velocimeter (LDV) to measure self-velocity. The measurement result of the designed SFV is compared with that of the LDV. It is shown that the measurement result of the SFV is coincident with that of the LDV. Therefore, the designed SFV is suitable for a vehicle self-contained inertial navigation system.

Paper Details

Date Published: 17 March 2015
PDF: 6 pages
Opt. Eng. 54(3) 034110 doi: 10.1117/1.OE.54.3.034110
Published in: Optical Engineering Volume 54, Issue 3
Show Author Affiliations
Xin He, National Univ. of Defense Technology (China)
Jian Zhou, National Univ. of Defense Technology (China)
Xiaoming Nie, National Univ. of Defense Technology (China)
Xingwu Long, National Univ. of Defense Technology (China)


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