Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 12
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
2輪駆動トラクタのけん引効率予測 OAK
大友, 功一; 岸本, 正; OHTOMO, Koichi; KISHIMOTO, Tadashi.
トラクタのけん引性能を評価するための一つの方法として, 2輪駆動トラクタのけん引効率の予測を行なった。予測精度を検討するために, トラクタの機体条件ならびに平均円すい指数からけん引効率等を予測すると共に, 土壌密度を変えた圃場でけん引性能試験を行ない実測データを収集した。けん引力およびけん引効率の実測値の予測値に対する偏差と予測最大値との比を偏差率として定義し求め, 予測精度を検討した。その結果, 全データの偏差率の平均値は, けん引力で0.07%, けん引効率で-0.29%となり, 提案モデルは高い精度で予測できることを示した。 A prediction of the tractive efficiency of a two-wheel drive tractor was conducted with tractor dimensions and average cone indexes. Experimental data in a field for the discussion of the prediction accuracy were obtained through tractor drawbar pull tests. The deviations of the measured data to the predicted one of drawbar pull and tractive efficiency were calculated,and the deviation rates which were defined as the ratio of the deviation to the predicted maximums of the drawbar pull and the...
Palavras-chave: トラクタ; けん引力; けん引効率; 円すい指数; 予測モデル; Tractor; Drawbar pull; Tractive effciency; Cone index; Prediction model.
Ano: 2000 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2955
Imagem não selecionada

Imprime registro no formato completo
Coletor de dados para medir desempenho de tratores e implementos. Repositório Alice
INAMASU, R.Y.; MACEDO, A.; RABELLO, L.M.; CRUVINEL, P.E.; TANIWAKI, K.; FRANZ, C.; FOLLE, S.M.; CORONA JUNIOR, N..
O trabalho apresenta um coletor de dados portatil projetado para armazenar dados de desempenho de tratores e implementos em campo. O coletor foi desenvolvido utilizando um microcontrolador 80C31 da Intel e memorias RAM com bateria de "backup". O coletor possui entradas para transdutores de consumo de combustivel, tracao do implemento, rotacao do motor, patinacao e outros, e e alimentado pela bateria do trator. Apos experimentos realizados e arquivos gerados, o coletor e levado a um microcomputador, onde, atraves de um interface serial padrao RS-232C, os dados sao descarregados em arquivos. Cada arquivo em disco, flexivel ou rigido, possui um identificador do evento, a hora e a data do levantamento, possibilitando distinguir os varios experimentos realizados.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Coletor; Trator; Implemento; Desempenho; Data-logger; Tractor; Implement.
Ano: 1992 URL: http://www.alice.cnptia.embrapa.br/handle/doc/26672
Imagem não selecionada

Imprime registro no formato completo
Desempenho de tracao de um trator agricola (2RM) em solo aluvial. Repositório Alice
BIANCHINI, A.; MANTOVANI, E.C.; MARTYN, P.J.; CECON, P.R.; VIEIRA, L.B.; DIAS, G.P..
O trabalho teve o objetivo de avaliar o desempenho de um trator agricola 2RM, em solo aluvial. O delineamento experimental adotado foi um fatorial (3x2x2), sendo tres niveis de umidade do solo (36,3, 41,7 e 49,1%), dois niveis de cobertura vegetal (2.561 e 3.690 kg/ha) e dois niveis de profundidade de trabalho (27,1 e 33,1 cm), com tres repeticoes. O nivel de umidade 36,3% apresentou o maior risco de compactacao. A eficiencia tratoria apresentou diferencas significativas, entre niveis de umidade, apenas na maior profundidade de trabalho (33,1 cm), na presenca de 3.690 kg/ha de cobertura vegetal. A profundidade de trabalho influenciou todos os parametros estudados na avaliacao de desempenho do trator.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Desempenho; Trator agricola; Solo; Performance; Tractor; Soil.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/88652
Imagem não selecionada

Imprime registro no formato completo
Design and fabrication of a tractor powered leaves collector machine equipped with suction-blower system CIGR Journal
Azadbakht, Mohsen; Kiapey, Ali; Jafari, Ali.
Leaves scattered on the parks, passages, and other places have a detrimental effect on the beauty of the environment, and decrease photosynthesis, hence, the efficiency of plants.  Leaves are also used in the production of peat.  This makes using leaves collectors in parks, and organizations with a green space useful.  Due to the fact that leaves take up a high volume, their transportation is difficult.  Using the machine introduced in this paper which was equipped with a suction-blower system, increases efficiency, and at the same time decreases the costs of green space, and their workforce cost.  Focusing on overcoming the mentioned difficulties, this study was carried out in order to design and produce a tractor powered leaves collector equipped with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaves collector; Blower system; Suction system; Design; Power; Tractor.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2850
Imagem não selecionada

Imprime registro no formato completo
Estimation of the lifespan of agricultural tractor using a diffusion model at the aggregate level Ciencia e Investigación Agraria
Muñoz,Ricardo; Llanos,José.
The adoption of agricultural tractors by farms has resulted in different combinations, relationships and established ways of production of localities, regions and countries. The dynamics of the tractorization process are defined by the balance of the units that enter the fleet and those that are removed at the end of their useful life. This study uses a diffusion pattern and aggregated adoption of the agricultural tractor, the parameters of which were determined using a nonlinear estimation procedure and country-level data for Chile. Using the predictive power of the model, a longitudinal series of tractor fleets was estimated, and then the balance was calculated considering the units that were discharged. To more accurately determine the average lifespan...
Tipo: Journal article Palavras-chave: Aggregate diffusion; Agricultural mechanization; Lifespan; Technology adoption; Tractor; Tractorization.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300014
Imagem não selecionada

Imprime registro no formato completo
Failure rate analysis of four agricultural tractor models in southern Iran CIGR Journal
Afsharnia, Fatemeh; Asoodar, Mohammad Amin; Abdeshahi, Abbas; Marzban, Afshin.
Tractors play an important role in agricultural mechanization.  A repairable mechanical system (as agricultural tractor) is prone to deterioration or repeated failures.  In this study, the owners of three hundred tractors, which include Massey Ferguson (MF285 model and MF399 model), John Deere (JD3140 model) and Universal (U650 model), were interviewed, from five regions of Khouzestan Province.  A regression model was used to predict the tractors failure rate.  The machine failure pattern was carefully studied and key factors affecting the failure rate were identified in these regions.  The data obtained from farm records valid by using questionnaire was separated into two groups according to how those tractors were stored.  Results showed that the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Failure rate; Tractor; Storage condition; Khouzestan.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2651
Imagem não selecionada

Imprime registro no formato completo
Influence of tyres characteristics and travelling speed on ride vibrations of a modern medium powered tractor Part II, Evaluation of the Health Risk CIGR Journal
Servadio, Pieranna; Belfiore, Nicola Pio.
In this paper, according to ISO 2631/1, 1997, the influence of the mechanical vibrations on human health is evaluated and assessed with four methods: the health guidance caution zones (HGCZ), the estimated vibration dose value (eVDV), the fourth power vibration dose value (VDV), a combination of various methods presented in literature.  The normative refers to the HGCZ, which involves the average RMS vibration emission level and its exposure time during a given working day.  Values of crest factor for the operator seat showed that Z-axis was the more solicited, even if all the crest factor values are below 9.  Results of mechanical vibration in respect of comfort and health, according with the method of the HGCZ, showed that only case B, at higher forward...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering; Tractors; Vibrations; Ergonimics whole body vibration; Tractor; Comfort; Health risk; Tyres.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2544
Imagem não selecionada

Imprime registro no formato completo
MEASUREMENT AND ANALYSIS OF A FIELD AREA BASED ON AN ADAPTIVE KALMAN FILTER REA
Fang,Susu; Wang,Zengcai; Zhong,Wenjun.
ABSTRACT: This paper proposed the use of an adaptive Kalman filter (AFK) to improve Global Positioning System (GPS) positioning accuracy to measure a tractor operational area. First, we used MATLAB to identify the operation trajectory. Then, we used different colors to show the area of operation. Finally, we used an image-processing method to calculate the effective operational area, actual operational area, and repeat and omission rates. We used these rates to evaluate the tractor efficiency. The experiment indicated that the Kalman filter improved the accuracy of GPS single-point positioning. To test the GPS area-measurement precision, field area measurements were taken. We used GPS to measure standard figures and some irregular figures. The results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tractor; Kalman filter; Global Positioning System (GPS); Operational area.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500867
Imagem não selecionada

Imprime registro no formato completo
Moto-mecanização no perímetro irrigado no Vale do Rio São Francisco: estudo do caso do Projeto Bebedouro. Repositório Alice
LAL, H..
O trabalho avalia a intensidade e modo de utilizacao dos tratores no Projeto Bebedouro da CODEVASF, baseado nos dados fornecidos pela CAMPIB (Cooperativa Agricola Mista do Projeto de Irrigacao do Bebedouro Ltda.) e de um produtor (Fazenda Delta Agropecuaria Ltda.) da regiao. Foram analisados os dados de tres anos (1980, 1981 e 1982) de 15 tratores da CAMPIB e de dois anos (1980 e 1981) de um trator da Fazenda Delta. A maior utilizacao dos tratores no Projeto e feita para operacoes do preparo do solo (aracao e gradagem) variando de 70% a 80% das horas produtivas no caso da CAMPIB e 58% no caso da Fazenda Delta, tendo uso anual em ambos os casos na faixa de 1.000-1.400 horas por trator. As outras operacoes realizadas usando tratores sao transporte, trilhagem...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Mecanização agrícola; Irrigação; Trator; Agricultura; Brasil; Pernambuco; Projeto Bebedouro; Power machinery; Tractor; Agriculture; Irrigation; Mecanização agrícola; Power machinery.
Ano: 1988 URL: http://www.alice.cnptia.embrapa.br/handle/doc/132295
Imagem não selecionada

Imprime registro no formato completo
Noise evaluation of MF285 tractor while pulling a trailer in an asphalt road CIGR Journal
Farzad Jalilian tabar; Hekmat Rabbani; Agricultural Machinery Department, Razi University of Kermanshah, Iran; Alinejat Lorestani; Agricultural Machinery Department, Razi University of Kermanshah, Iran; Payam Javadikia; Agricultural Machinery Department, Razi University of Kermanshah, Iran; Rashid Gholami; Agricultural Machinery Department, Razi University of Kermanshah, Iran;.
Tractors have been used for transportation on roads by many farmers in addition to use in the field operations. MF285 tractor is the popular kind of tractor in Iran (about 30% of all tractors) and almost this tractor has been used without cabin.  Despite the problems caused by noise from the tractors and all its adverse effects on users and observers, no comprehensive research has been done on them.  The result of this research indicate that the noise level of MF285 tractor, in 2250 r/min engine speed, will be 90 dB(A) which in comparison with the standard value, 85 dB(A), is dangerous for operator’s ears.  The test site was prepared according to the international standards.  The noise emitted by tractor in three gears (2, 3 and 4) and three speeds (1,500,...
Palavras-chave: Noise; Tractor; Sound pressure level; Ergonomics.
Ano: 2012 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2096
Imagem não selecionada

Imprime registro no formato completo
PERFORMANCE OF AN AGRICULTURAL DIESEL ENGINE USING DIFFERENTS FUELS REA
Perin,Gismael F.; Schlosser,José F.; Galon,Leandro; Rodrigues,Fabrício A.; Frantz,Ulisses G..
ABSTRACT The use of fuels for agricultural Diesel engines cycle, both of mineral origin (Diesel) or vegetable and animal origin (biodiesel) can significantly alter its performance. Therefore, the aim of this study was to quantify the change in torque, power and consumption of agricultural Diesel engine fuel using minerals and vegetables fuels. It was used a tractor power take-off coupled to a magnetic brake dynamometer (for measuring speed and torque for subsequent calculation of power), and a flow meter (for measuring the hourly fuel consumption and specific fuel consumption calculation). Eleven different fuels (S10 mineral diesel with 5%, 10%, 15%, 20% and 50% biodiesel and mineral diesel S500 with 5%, 10%, 15%, 20% and 50% biodiesel, have been used pure...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Test; Dynamometer; Tractor; Torque; Power.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100091
Imagem não selecionada

Imprime registro no formato completo
Predicting Failure Rate in Different Maintenance Conditions for MF 399 Tractor, a case study in southwest of Iran CIGR Journal
Afsharnia, Fatemeh.
The use of tractors for agricultural works showed an important role to mechanized agricultural sector. A repairable mechanical system (as agricultural tractor) is subject to deterioration or repeated failure. In this study, the regression model was used to predict the failure rate of MF399 tractor. The machine failure pattern was carefully studied and key factors affecting the failure rate were identified in five regions of Khouzestan province. Results showed that different annual use hours and maintenance policies affected failure rate. According to the data, the MF399 tractors included in 300-1000 annual use hours were commonly in a randomized breakdown period during their useful life but these tractors tend to enter the wear out period in the 1200-2000...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Failure rate; Tractor; Maintenance condition; Khouzestan.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2964
Registros recuperados: 12
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional