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Title:
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Eye-safe lidar system for pesticide spray drift measurement
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Author:
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Gregorio López, Eduard; Rocadenbosch Burillo, Francesc; Sanz Cortiella, Ricardo; Rosell Polo, Joan Ramon
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Notes:
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Spray drift is one of the main sources of pesticide contamination. For this
reason, an accurate understanding of this phenomenon is necessary in order to limit its
effects. Nowadays, spray drift is usually studied by using in situ collectors which only
allow time-integrated sampling of specific points of the pesticide clouds. Previous research
has demonstrated that the light detection and ranging (lidar) technique can be an alternative
for spray drift monitoring. This technique enables remote measurement of pesticide clouds
with high temporal and distance resolution. Despite these advantages, the fact that no lidar
instrument suitable for such an application is presently available has appreciably limited its
practical use. This work presents the first eye-safe lidar system specifically designed for
the monitoring of pesticide clouds. Parameter design of this system is carried out
via signal-to-noise ratio simulations. The instrument is based on a 3-mJ pulse-energy
erbium-doped glass laser, an 80-mm diameter telescope, an APD optoelectronic receiver
and optomechanically adjustable components. In first test measurements, the lidar system has
been able to measure a topographic target located over 2 km away. The instrument has also
been used in spray drift studies, demonstrating its capability to monitor the temporal and distance evolution of several pesticide clouds emitted by air-assisted sprayers at distances
between 50 and 100 m.
This research was partially funded by the Spanish Ministry of Economy and Competitiveness (projects AGL2007-66093-C04-03, AGL2010-22304-C04-03 and AGL2013-48297-C2-2-R) and EU FEDER. This work was conducted in the framework of the collaboration agreement between the Universitat Politècnica de Catalunya (UPC) and the Universitat de Lleida (UdL) ref. A-00793 for Range-Resolved Remote Sensing of the Concentration of Pesticides in Agroforestry Environments. Alexandre Escolà and Joan Masip from the UdL, and Adolfo Comerón, Alejandro Rodríguez and Jordi Tiana from the UPC, are thanked for their cooperation in preparing this work. Innovació i Recerca Industrial i Sostenible S.L. (IRIS) is thanked for his cooperation in the development of the receiving subsystem. |
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Subject(s):
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-Lidar
-Spray drift
-Optomechanical design
-Signal-to-noise ratio
-Pesticides |
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Rights:
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cc-by, (c) Gregorio López, Eduard et al., 2015
http://creativecommons.org/licenses/by/3.0/es/
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Document type:
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article
publishedVersion |
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Published by:
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MDPI
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