A UGV-based laser scanner system for measuring tree geometric characteristics

Yonghui Wang; Yubin Lan; Yongjun Zheng; Kevin Lee; Suxia Cui; Jian-ao Lian

doi:10.1117/12.2042341

19 September 2013 A UGV-based laser scanner system for measuring tree geometric characteristics

Yonghui Wang, Yubin Lan, Yongjun Zheng, Kevin Lee, Suxia Cui, Jian-ao Lian

Proceedings Volume 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications; 890532 (2013) https://doi.org/10.1117/12.2042341
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

This paper introduces a laser scanner based measurement system for measuring crop/tree geometric characteristics. The measurement system, which is mounted on a Unmanned Ground Vehicle (UGV), contains a SICK LMS511 PRO laser scanner, a GPS, and a computer. The LMS511 PRO scans objects within distance up to 80 meters with a scanning frequency of 25 up to 100Hz and with an angular resolution of 0.1667° up to 1°. With an Ethernet connection, this scanner can output the measured values in real time. The UGV is a WIFI based remotely controlled agricultural robotics system. During field tests, the laser scanner was mounted on the UGV vertically to scan crops or trees. The UGV moved along the row direction with certain average travel speed. The experimental results show that the UGV's travel speed significantly affects the measurement accuracy. A slower speed produces more accurate measuring results. With the developed measurement system, crop/tree canopy height, width, and volume can be accurately measured in a real-time manner. With a higher spatial resolution, the original data set may even provide useful information in predicting crop/tree growth and productivity. In summary, the UGV based measurement system developed in this research can measure the crop/tree geometric characteristics with good accuracy and will work as a step stone for our future UGV based intelligent agriculture system, which will include variable rate spray and crop/tree growth and productivity prediction through analyzing the measured results of the laser scanner system.

Citation Download Citation

Yonghui Wang, Yubin Lan, Yongjun Zheng, Kevin Lee, Suxia Cui, and Jian-ao Lian "A UGV-based laser scanner system for measuring tree geometric characteristics", Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 890532 (19 September 2013); https://doi.org/10.1117/12.2042341

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