Double extended octagonal ring (DEOR) drawbar dynamometer

Chen, Yu; McLaughlin, Neil; Tessier, S.

doi:10.1016/j.still.2006.06.008

Cited by 31 publications

(13 citation statements)

References 12 publications

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“…Drawbar dynamometers are designed to measure the forces exerted by pull type implements on the tractor drawbar (Chen et al 2007). These dynamometers have been extensively studied by many researchers (Godwin 1975;Zoerb 1983;Godwin et al 1993;Kirisci et al 1993;Chen 2007).…”

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confidence: 99%

A novel three-point hitch dynamometer to measure the draft requirement of mounted implements

Askari¹,

Komarizade²,

Nikbakht³

et al. 2011

Res. Agric. Eng.

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Askari M., Komarizade M.H., Nikbakht A.M., Nobakht N., Teimourlou R.F., 2011. A novel three-point hitch dynamometer to measure the draft requirement of mounted implements. Res. Agr. Eng., 57: 128-136.An adjustable three-point hitch dynamometer with a draft capacity of 50 kN was developed to measure forces on the tractor and mounted implements. The design concept of the dynamometer was based on two linkage frames mounted between tractor links and the implement. The force sensing elements were comprised of a loadcell that was installed between the frames. The system provides variable width and height of the dynamometer links to satisfy a wide range of implement dimensions. All mounted tillage implements at categories II and III such as plows, cultivators and harrows were able to be tested by this dynamometer excluding mounted implements powered by power take-off (PTO). The dynamometer was calibrated and several field tests were conducted to measure the force required to pull a moldboard plow in a clay loam soil. The calibration showed a high degree of linearity between the draft requirements and the dynamometer outputs. Field tests showed that it was able to function effectively as intended without any mechanical problems.

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mentioning

confidence: 99%

A novel three-point hitch dynamometer to measure the draft requirement of mounted implements

Askari¹,

Komarizade²,

Nikbakht³

et al. 2011

Res. Agric. Eng.

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“…Double extended octagonal ring (DEOR) drawbar dynamometer (Godwin et al, 1993;Leonard, 1980) was designed later. Chen et al (2007) developed a 2D DEOR drawbar dynamometer with a high draft capacity of 180 kN. The two extended octagonal rings were oriented vertically on either side of the tractor drawbar which provided a better match of strain to expected drawbar draft and vertical load than could be achieved with a horizontal orientation in previous designs.…”

Section: Drawbar Powermentioning

confidence: 99%

Research Trends for Performance, Safety, and Comfort Evaluation of Agricultural Tractors: A Review

Kabir¹,

Ryu²,

Chung³

et al. 2014

Journal of Biosystems Engineering

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Background: Significant technological development and changes happened in the tractor industries. Contrariwise, the test procedures of the major standard development organizations (SDO's) remained unchanged or with a little modification over the years, demanding new tractor test standards or improvement of existing ones for tractor performance, safety, and comfort. Purpose: This study focuses on reviewing the research trends regarding performance, safety and comfort evaluation of agricultural tractors. Based on this review, few recommendations were proposed to revise or improve the current test standards. Review: Tractor power take-off power test using the DC electric dynamometer reduced human error in the testing process and increased the accuracy of the test results. GPS signals were used to determine acceleration and converted into torque. High capacity double extended octagonal ring dynamometer has been designed to measure drawbar forces. Numerical optimization methodology has been used to design three-point hitch. Numerous technologies, driving strategies, and transmission characteristics are being considered for reducing emissions of gaseous and particulate pollutants. Engine emission control technology standards need to be revised to meet the exhaust regulations for agricultural tractors. Finite Element Analysis (FEA) program has been used to design Roll-Over Protective Structures (ROPS). Program and methodology has been presented for testing tractor brake systems. Whole-body vibration emission levels have been found to be very dependent upon the nature of field operation performed, and the test track techniques required development/adaptation to improve their suitability during standardized assessment. Emphasizes should be given to improve visibility and thermal environment inside the cab for tractor operator. Tractors need to be evaluated under electromagnetic compatibility test conditions due to large growing of electronic devices. Research trends reviewed in this paper can be considered for possible revision or improvement of tractor performance, safety, and comfort test standards.

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“…Its performance evaluation is essential in order to reduce the cost of the tillage operation [2][3][4]. However dynamometer is required to measure drawbar forces in field research on energy inputs for agricultural field equipment [5]. Tillage speed and depth, as well as soil bulk density, were additional variables that had a highly significant effect on displacement [6].…”

Section: Introductionmentioning

confidence: 99%

Design, Development, and Performance Evaluation of a Trash-Board Moldboard Plow for the Interaction between Soil and Straw with Two Different Water Content Levels

Abdallah

Ding

et al. 2016

Agronomy

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Abstract:A two-year field study was conducted to investigate the performance of a lightweight trash-board moldboard plow (with and without a trash-board), as influenced by stubble height and water content. Both fields were measured for the performance of a trash-board moldboard plow when used during the optimization of the plowing depth, the water content, and the reaction forces. The results showed that in the first year, when a trash-board was required, the results were significantly different. The fields had lower draft and reaction force in the soil with only stubble height, which was greater than that in the soil with dense straw for all water content levels. This was also observed in the second year for the whole depth. This study shows that the moldboard plow with a trash-board provided minimum draft and reaction forces with only straw and heavy straw. The results indicate that straw nearby shear significantly increased displacement for all treatments, with variance of straw nearby moldboard. Hence, the results verify that a trash-board continuously created large soil fragmentation with different water content. Straw labels create a position of straw which also allows for better results. It is important to install trash-boards with the moldboard plow for heavy straw incorporation.

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Double extended octagonal ring (DEOR) drawbar dynamometer

Cited by 31 publications

References 12 publications

A novel three-point hitch dynamometer to measure the draft requirement of mounted implements

A novel three-point hitch dynamometer to measure the draft requirement of mounted implements

Research Trends for Performance, Safety, and Comfort Evaluation of Agricultural Tractors: A Review

Design, Development, and Performance Evaluation of a Trash-Board Moldboard Plow for the Interaction between Soil and Straw with Two Different Water Content Levels

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