COMPARISON OF TRACTOR GROUND SPEED MEASUREMENT TECHNIQUES.

被引：0

作者：

Tompkins, F.D. ^{[1
]}

Hart, W.E. ^{[1
]}

Freeland, R.S. ^{[1
]}

Wilkerson, J.B. ^{[1
]}

Wilhelm, L.R. ^{[1
]}

机构：

[1] Univ of Tennessee, Knoxville, TN,, USA, Univ of Tennessee, Knoxville, TN, USA

来源：

Transactions of the American Society of Agricultural Engineers | 1988年 / 31卷 / 02期

关键词：

MECHANICAL VARIABLES MEASUREMENT - Velocity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Performances of fifth wheel, front wheel, and single-beam radar vehicle ground speed sensors were evaluated on an agricultural tractor at operating speeds of 4, 7 and 10 km/h. Surface conditions included a smooth, non-deformable surface, soils subjected to various levels of tillage, and a range of vegetative covers. Based upon calibration values obtained for each sensor during tractor operation over the smooth, non-deformable surface, radar generally produced more accurate indications of true ground speeds than sensors with ground-contacting wheels. Coefficients of variation in indicated ground speed over time were also generally less for the radar unit that for either fifth wheel or front wheel units. The magnitude of the slip between the ground-contacting wheels and the tractive surface varied inversely with surface firmness. Thus, speed sensors having ground-contacting wheels should be calibrated for the specific surface conditions over which vehicle velocity measurement is to be obtained.

引用

页码：369 / 374