GRAIN VELOCITY MEASUREMENT WITH OPTICAL SENSORS.

被引：0
|
作者：
Chang, C.S. [1 ]
Martin, C.R. [1 ]
Lai, F.S. [1 ]
机构：
[1] USDA, Manhattan, KS, USA, USDA, Manhattan, KS, USA
来源：
Transactions of the American Society of Agricultural Engineers | 1986年 / 29卷 / 05期
关键词：
FLOW OF SOLIDS - Granular Materials - MECHANICAL VARIABLES MEASUREMENT - Velocity - OPTICAL INSTRUMENTS - Applications;
D O I：
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学科分类号：
摘要：
Grain velocity probes were developed and used to measure the velocities of grain on a rotating disk and in a free-fall grain stream. Each probe consisted of two photo-detectors spaced at a fixed distance and four to seven infrared-emitting diodes. By cross-correlating the signals generated by the two detectors, the transit time required for the grain kernels to travel the distance between the detectors was determined. From the values of transit time and the known distance between the detectors, velocities of grain ranging from 2 to 9 m/s, were measured within an accuracy of plus or minus 10%.
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页码：1451 / 1455
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