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Evaluation of an optical sensor for tuber yield monitoring

Persson, Andreas LU ; Eklundh, Lars LU and Algerbo, Per-Anders (2004) In Transactions of the Asae 47(5). p.1851-1856
Abstract
A sensor for monitoring the yield of tubers was tested in the laboratory and in the field. The laboratory test was designed to investigate whether the sensor varied in its measurements of tuber size, whether the recorded size differed within the width of the sensor, and whether tilting of the sensor affected the result. The test objects were spheres, and measurements were carried out on three different sizes. A statistical analysis showed how the sensor measured the sizes for the different combinations of size, position, and inclination. In the field, a harvester-mounted sensor was used to monitor yield of Bintje potatoes in terms of tuber size and weight. The results obtained were compared with those from mechanical load-cell... (More)
A sensor for monitoring the yield of tubers was tested in the laboratory and in the field. The laboratory test was designed to investigate whether the sensor varied in its measurements of tuber size, whether the recorded size differed within the width of the sensor, and whether tilting of the sensor affected the result. The test objects were spheres, and measurements were carried out on three different sizes. A statistical analysis showed how the sensor measured the sizes for the different combinations of size, position, and inclination. In the field, a harvester-mounted sensor was used to monitor yield of Bintje potatoes in terms of tuber size and weight. The results obtained were compared with those from mechanical load-cell measurements. An expression relating tuber size to weight was determined. Plot-harvesting tubers provided data for evaluation of tuber size in relation to yield. The results showed that the errors in size determination by the sensor were in the order of 1% to 2%. Different size classes were well differentiated. Some differences were noted for object position and sensor inclination. Field tests showed that the mean deviation from measured weight was about 1%. It was concluded that sensor errors were small and that the sensor could discriminate between different sizes for the spheres used in the study. In the field, the sensor worked with good consistency and is a potential option for tuber yield monitoring. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
optical sensor potato, tuber, yield monitoring
in
Transactions of the Asae
volume
47
issue
5
pages
1851 - 1856
publisher
American Society of Agricultural and Biological Engineers
external identifiers
  • wos:000225002700047
  • scopus:11144285945
ISSN
0001-2351
language
English
LU publication?
yes
id
fa331922-1ff2-4a28-a548-3482d6966ed6 (old id 260385)
alternative location
http://asae.frymulti.com/abstract.asp?aid=17602&t=1
date added to LUP
2007-10-29 15:24:21
date last changed
2017-01-01 07:00:22
@article{fa331922-1ff2-4a28-a548-3482d6966ed6,
  abstract     = {A sensor for monitoring the yield of tubers was tested in the laboratory and in the field. The laboratory test was designed to investigate whether the sensor varied in its measurements of tuber size, whether the recorded size differed within the width of the sensor, and whether tilting of the sensor affected the result. The test objects were spheres, and measurements were carried out on three different sizes. A statistical analysis showed how the sensor measured the sizes for the different combinations of size, position, and inclination. In the field, a harvester-mounted sensor was used to monitor yield of Bintje potatoes in terms of tuber size and weight. The results obtained were compared with those from mechanical load-cell measurements. An expression relating tuber size to weight was determined. Plot-harvesting tubers provided data for evaluation of tuber size in relation to yield. The results showed that the errors in size determination by the sensor were in the order of 1% to 2%. Different size classes were well differentiated. Some differences were noted for object position and sensor inclination. Field tests showed that the mean deviation from measured weight was about 1%. It was concluded that sensor errors were small and that the sensor could discriminate between different sizes for the spheres used in the study. In the field, the sensor worked with good consistency and is a potential option for tuber yield monitoring.},
  author       = {Persson, Andreas and Eklundh, Lars and Algerbo, Per-Anders},
  issn         = {0001-2351},
  keyword      = {optical sensor potato,tuber,yield monitoring},
  language     = {eng},
  number       = {5},
  pages        = {1851--1856},
  publisher    = {American Society of Agricultural and Biological Engineers},
  series       = {Transactions of the Asae},
  title        = {Evaluation of an optical sensor for tuber yield monitoring},
  volume       = {47},
  year         = {2004},
}