Intelligent herbicide application system for reduced herbicide vegetation control : phase II-commercialization
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2008-12-01
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Abstract:This report describes the development of a commercial prototype intelligent herbicide application system
(IHAS). The improved design incorporates a parallel “add-on” type fluid handling system to allow existing
variable-rate herbicide injection systems currently used on Caltrans herbicide spray vehicles to be retrofitted
with IHAS technology, and a dual camera system for weed recognition under partially shaded lighting
conditions. The new IHAS is capable of targeting green plant material within a 3.66 m perpendicular distance
to the direction of travel on either side of the herbicide spray vehicle for herbicide application.
The basic principal of an intelligent herbicide application system (IHAS) is that a real-time machine vision
system can detect live (green) plant material growing along the roadside, and when coupled to a rapid-response
spray control system, will permit the California Department of Transportation to selectively apply
post-emergence herbicides exclusively to the unwanted plant material. The implementation of the IHAS
technology will allow the California Department of Transportation to reduce the amount of resources required to
maintain an effective weed control program using herbicides while at the same time reducing the amount of
chemicals unnecessarily released into the environment.
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