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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Biosystems Engineering
Journal Basic Information
Journal DOI :
Korean Society for Agricultural Machinery
Editor in Chief :
Volume & Issues
Volume 30, Issue 6 - Dec 2005
Volume 30, Issue 5 - Oct 2005
Volume 30, Issue 4 - Aug 2005
Volume 30, Issue 3 - Jun 2005
Volume 30, Issue 2 - Apr 2005
Volume 30, Issue 1 - Feb 2005
Selecting the target year
Development of a Precision Seed Metering Device for Direct Seeding of Rice
Yoo S. N. ; Choi Y. S. ; Suh S. R. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 261~267
DOI : 10.5307/JBE.2005.30.5.261
In order to save labor and cost, direct seeding has been considered as an important alternative to the machine transplanting in rice cultivation. As current seeders for direct seeding of rice seeds drill irregular amount of seeds under various operating conditions, conventional drilling should be turned to precision planting which enables accurate placement of proper amount of rice seeds at equal intervals within rows. In this study, design, construction and performance evaluation of a precision seed metering device for planting of rice seeds were carried out. As prototype, the conventional roller type seed metering device was modified for planting: increasing diameter of metering roller, setting 2 or 4 seed cells on metering roller, adding seed discharging lid and its driving cam mechanism. Through performance tests for prototype and the current seed metering device, number of seeds in a hill, planting space and its error ratio, coefficient of variation of planting space (planting accuracy), and seeding length of
of seeds in a hill divided by planting space (planting precision) at setting planting spaces of 15, and 20cm, seeding heights of 10, and 20cm, and seeding speeds of 0.1, 0.2, and 0.5m/s were investigated. Prototype showed better seed planting performance than the current seed metering devices. When setting planting space of 15 cm and seeding height of 10cm, prototype with 2 seed cells showed that variations of planting space and seeding lengths of
of seeds in a hill at up to seeding speed of 0.5m/s were within 0.9cm, and 3.6cm, respectively.
Selection of Optimum Fulcrum Type for Measurement and Geo-statistical Analyze of Elevation within Rice Paddy Field
Sung J. H. ; Jang S. W. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 268~273
DOI : 10.5307/JBE.2005.30.5.268
This study was conducted to investigate the specificities of four fulcrum types for geo-statistical analysis of elevation within rice paddy field. In Korea, the spaces between inter-rows and between hills for rice transplanting are 30cm and 11cm to 14cm, respectively. So, the size and shape of fulcrum for field elevation measurement should be considered according to the inter-row and the hill spaces. Four kinds of fulcrum were chosen such as round-shape with 2.5cm diameter, circular-shape with 10cm diameter, 10cm (one third of inter-row space) by 24cm (double of hill space) rectangular-shape, and 20cm (two-thirds of inter-row space) by 24cm rectangular-shape. The resulting descriptive statistics couldn't determine the best fulcrum type to measure the rice paddy field elevation. But the results of geo-statistical analysis could determine the best fulcrum type. In the case of 10cm by 24cm rectangular-shape fulcrum, Nugget and range, meaning measurement error and/or noise, and limit of spatial connection, respectively, were minimum; Q value meaning weight of spatial structure and
value were minimum, and residual sum of squares was minimum. It means that 10cm by 24 cm rectangular-shape fulcrum could best describe the rice paddy field elevation.
Mechanical Behavior of Fruits under Impact Loading
Hong J. H. ; Myung B. S. ; Choe J. S. ; Kim C. S. ; Kim T. W. ; Chung J. H. ; Park J. W. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 274~279
DOI : 10.5307/JBE.2005.30.5.274
Impact is one of the major cause of damage to fruits druing varios processes from the production on the farm to the consumer. The tissue of fruits are ruptured in a very short period time less than 10ms by impact loading. Mechanical behavior of fruits under impact loading can be analyzed better with high speed sampling data acquisition system and one of them is a digital storage oscilloscope. A impact test system was developed to test the physical properties of fruits including apple, pear, and peach which may lead to a better understanding of the physical laws. The test system consisted of a digital storage oscilloscope and simple mechanism which can apply impact force to fresh produce. Rupture force, energy, and deffrmation were measured at the five levels of drop heights from 4 to 24cm fur each internal and external tissues. Rupture forces for apple and pear were in the range of 72.9 to 87.7 N and 70.8 to 84.1 N for external and internal tissues, respectively. Rupture forces far peach external tissues were in the range of 43.4 to 65.0 N.
Mechanical Behavior of Fruits under Compression Loading
Hong J. H. ; Kim C. S. ; Kim J. Y. ; Kim J. H. ; Myung B. S. ; Chung J. H. ; Park J. W. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 280~284
DOI : 10.5307/JBE.2005.30.5.280
Front the production on the farm to the consumer, agricultural products are subject to various physical treatments involving mechanical techniques and devices. It is essential to understand the physical laws governing the response of these biological materials so that the machines, processes, and handling operations can be designed fur maximum efficiency and the highest quality of the end products. A compression test system was developed to test the physical properties of fruits including apple, pear, and peach which may lead to a better understanding of the physical laws. The test system consisted of a digital storage oscilloscope and simple mechanism which can apply quasi-static compression to fresh fruits. Rupture force, energy, and deformation were measured at the five levels of compression speed from 1.25 to 62.5 mm/min for each internal and external tissues. Rupture forces for apple and pear were in the range of 42.2 to 46.2 N and 38.8 to 41.2 N for external and infernal tissues, respectively. Rupture forces fir peach external tissues were in the range of 48.2 to 54.0 N.
Physical Properties of Pulp Extrudates Mixed with Expanding Additives
Song D. B. ; Kim C. H. ; Jung H. S. ; Lee Y. M. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 285~292
DOI : 10.5307/JBE.2005.30.5.285
Extrusion process and physical properties of extrudates of pulp powder (TMP, thermomechanical pulp fibers) mixed with expanding additives was evaluated to develop biodegradable packaging materials. To find out the optimum condition, the status of extrusion process, coefficient of elastic and expansion ratio of extrudates were tested on the composites (wheat flour, soluble starch, polyvinyl alcohol), blending conditions of composites and moisture contents of extrudates. In case of material composition, wheat flour played a key role to keep extrusion process irrespective of the added amounts of soluble starch and polyvinyl alcohol. The coefficient of elastic of extrudates was increased and the expansion ratio was reduced as the added amounts of wheat flour increased. Also, the coefficient of elastic of extrudates was decreased as the moisture content of extrudates increased. The lowest coefficient of elastic was 439.55 kPa under the condition, of pulp powder mixed with
of wheat flour based on pulp weight and
of soluble starch based on wheat flour weight and controlled
(wb) of moisture content.
Development of a Multi-joint Robot Manipulator for Robot Milking System
Kim W. ; Lee D. W. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 293~298
DOI : 10.5307/JBE.2005.30.5.293
The purpose of this study was the development of a multi-joint robot manipulator for milking robot system. The multi-joint robot manipulator was controlled by 5 drivers with driver controller through the position information obtained from the image processing system. The robot manipulator to automatically attach each teat cup to the teats of a milking cow was developed and it's motion was accurately measured with error rate. Results were as follows. 1. Maximum errors in position accuracy were 4mm along X-axis, 4.5mm along Y-axis and 0.9mm along Z-axis. Absolute distance errors were maximum 4.8mm, minimum 2.7mm, and average 3.6mm. 2. Errors of repeatability were maximum 3.0mm along X-axis, 3.0mm along Y-axis, and 0.5mm along Z-axis. Distance error values were maximum 3.2mm, minimum 2.2mm, and average 2.5mm. It is envisaged that multi-joint robot manipulator can be applicate to milking robot system being developed in consideration of the experiment results.
Image Processing for Recognition of Cow Teats and Selection of a NIR Filter for Robot Milking System
Kim W. ; Lee D. W. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 299~305
DOI : 10.5307/JBE.2005.30.5.299
This study was developed image processing algorithm for recognition of few teats of a cow in the image using black and white camera attached with infrared filter. Spectroscopic analysis was used for selection of a NIR filter to separate teats from udder skin in the image captured. To verify the performance of image processing algorithm was developed and NIR filter was selected, carried out an experiment with cows. NIR band-pass filter was used to pass the 975nm band of light spectrum. The image processing algorithm was developed could recognize all teats and the process time was 0.9 second to recognize the all teats and to acquire end position of teats.
A Biosensor for Diagnosis of Swine Sarcoptic Mange
Cho H. K. ; Jee C. H. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 306~311
DOI : 10.5307/JBE.2005.30.5.306
In this study, a biosensor was developed to rapidly diagnose the swine sarcoptic mange (Sarcoptes scabies var. suis). The ELISA was modified to reduce the processing time for rapid diagnosis. The biosensor consists of a biological reaction part, and a measurement and control part. The biological reaction part was designed for using micro-pumps and valves for fluid transportation, and the measurement control part composed of a photodiode, a light-emitting diode fur light measurement, and a microcomputer to implement assay A polystyrene covet was used as a reaction chamber. Signal output was read as the rate of change in optical density at 645nm. Eighteen pigs diagnosed with sacroptic mange and 19 control pigs were tested. Fifteen sacbies-infested pigs showed positive results (
sensitivity). Sixteen control pigs showed negative results (
specificity). The system could execute a diagnosis cycle in about 45 min. The results suggest that this biosensor is useful for the rapid diagnosis of swine sacroptic mange.
Performance Evaluation of Flow Injection Type Biosensor According to Operating Variables of Pump
Song D. B. ; Jung H. S. ; Lee S. K. ;
Journal of Biosystems Engineering, volume 30, issue 5, 2005, Pages 312~317
DOI : 10.5307/JBE.2005.30.5.312
A flow injection type biosensor was tested to confirm the performance of a batch and a continuous type flow injection unit. Reproducibility and consistence of the biosensor were investigated to determine the effect of pulsations and air bubbles, and the applicability of on-line monitoring. The air bubbles affected the performance of the sensor irrespective of the location, and also the pulsations of the pump influenced the performance of the sensor. The applicability of on-line motoring was accepted as the result of the repeated and long-term measurements.