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摘要:
This article reports on track-monitoring and analyzing machine clearances during wood forwarding across seasons and weather, using ultrasonic distance sensors in combination with time-stamped GPS xy locations, at 10 sec intervals. The resulting data, obtained from 54 harvesting blocks, were analyzed by machine type (two wood forwarders and one grapple skidder), stand type (softwood plantation versus natural hardwood stands), month, slope, cartographic depth-to-water (DTW) classes, number of passes along track, and machine speed. For the most part, clearances were highly variable, due to passing over stumps, rocks, harvest slash, brushmats, ruts, and snow cover when present. This variability was on average greater for the lighter-weight wood forwarders than for the heavier-weight skidder, with the former mostly moving along equally spaced lines on brushmats, while the paths of the latter spread away from central wood-landing sites. In terms of trends, machines moved 1) more slowly on wet ground, 2) faster during returning than forwarding, and 3) fastest along wood-landing roads, as to be expected. Low clearances were most notable during winter on snow-covered ground, and on non-frozen shallow DTW and wet multiple-pass ground. During dry weather conditions, clearances also increased from low-pass tracks to multi-pass tracks due to repeat soil compaction of broadened tracks. These results are presented block-by-block and by machine type. Each block-based clearance frequency pattern was quantified through regression analysis and using a gamma probability distribution function.
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篇名 Track-Monitoring and Analyzing Machine Clearances during Wood Forwarding
来源期刊 林学期刊(英文) 学科 医学
关键词 WOOD FORWARDING GPS TRACKS CLEARANCE Frequencies Number of Passes Speed Ground Conditions Depth-to-Water (DTW)
年,卷(期) 2018,(3) 所属期刊栏目
研究方向 页码范围 297-327
页数 31页 分类号 R73
字数 语种
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研究主题发展历程
节点文献
WOOD
FORWARDING
GPS
TRACKS
CLEARANCE
Frequencies
Number
of
Passes
Speed
Ground
Conditions
Depth-to-Water
(DTW)
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
林学期刊(英文)
季刊
2163-0429
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
314
总下载数(次)
0
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