Calibration of the water track laser Doppler velocimeter based on pitch-independent laser Doppler velocimeter

Rong Huang; Qi Wang; Xiaoming Nie; Jian Zhou

doi:10.1117/12.3030383

3 June 2024 Calibration of the water track laser Doppler velocimeter based on pitch-independent laser Doppler velocimeter

Rong Huang, Qi Wang, Xiaoming Nie, Jian Zhou

Author Affiliations +

Proceedings Volume 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024); 131820Z (2024) https://doi.org/10.1117/12.3030383
Event: 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 2024, Kunming, China

Abstract

The water track laser Doppler velocimeter (WTLDV) reported by our group recently emits laser to sense the moving velocity of the carrier in forward direction relative to water in underwater environment. And SINS/WTLDV integrated navigation system is a promising underwater navigation system with high concealment and autonomy. In this study, a calibration system for WTLDV combining the pitch independent laser Doppler velocimeter (PILDV) and the towing tank is presented to obtain the velocity measurement accuracy of WTLDV in water. The heading angle of PILDV mounted on the cart should be calibrated firstly using the distance observation-based method. The three main contributions of uncertainty in the calibration system are discussed. The expanded uncertainty of the calibration system is less than 0.11%. one hundred times measurement by PILDV under the same set velocity of the cart indicate that the towing velocity of the cart is unstable so that the set velocity of the cart cannot be used to calibrate WTLDV. The calibration results show that the relative measurement error of WTLDV is less than 2.5% with expanded uncertainty of less than 0.11% in the velocity range of 1m/s to 2m/s. The proposed calibration system can be used in the calibration process for WTLDV, as well as other current profiling sensors, such as the impeller current meter, electromagnetic log and DVL.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rong Huang, Qi Wang, Xiaoming Nie, and Jian Zhou "Calibration of the water track laser Doppler velocimeter based on pitch-independent laser Doppler velocimeter", Proc. SPIE 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 131820Z (3 June 2024); https://doi.org/10.1117/12.3030383

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