Desenvolvimento de uma ferramenta de análise de desempenho de redes CAN (Controller Area Network) para aplicações em sistemas agrícolas

Godoy, Eduardo Paciência; Inamasu, Ricardo Yassushi

doi:10.11606/d.18.2007.tde-17052007-114426

Cited by 10 publications

(23 citation statements)

References 8 publications

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“…However, several other papers have used, incremented and adapted the proposed equations to include more characteristics of CAN networks and to do your own researches (Punnekkat, Hansson and Norstrom, 2000;Davis et al, 2006;Nolte, 2007). Godoy (2007) presents a revision about these equations and systemizes a CAN mathematical model to calculate performance parameters such as CAN bus utilization rate, network delays, and message transmission times. In the paper (Godoy, 2007), the CAN mathematical model is implemented in simulation software to ease the analysis of CAN networks and the model is verified and validated.…”

Section: Mathematical Model Systematizationmentioning

confidence: 99%

“…Godoy (2007) presents a revision about these equations and systemizes a CAN mathematical model to calculate performance parameters such as CAN bus utilization rate, network delays, and message transmission times. In the paper (Godoy, 2007), the CAN mathematical model is implemented in simulation software to ease the analysis of CAN networks and the model is verified and validated. The verification and validation processes consisted in the performance parameters comparison between the data obtained by the application of the simulation software and the data obtained using a real CAN network in laboratory.…”

Section: Mathematical Model Systematizationmentioning

confidence: 99%

“…The values of the variables T and O are different for the CAN message types. Godoy (2007) defines for CAN 2.0A, the values of 34 and 47 for T and O, and for CAN2.0B, the values of 54 and 67 respectively. Finally, the Eq.…”

Section: Mathematical Model Systematizationmentioning

confidence: 99%

“…Recently, much research work has been done on the performance analysis and design of methodologies for NCSs (Tipsuwan and Chow, 2003;Hespanha, Naghshtabrizi and Xu, 2007;Goodwin, Quevedo and Silva, 2008). A methodology is required to handle network time delays in control systems over a network, such as CAN and improve their performance.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Design of CAN-based distributed control systems with optimized configuration

Godoy¹,

Sousa²,

Porto³

et al. 2010

J. Braz. Soc. Mech. Sci. & Eng.

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Section: Mathematical Model Systematizationmentioning

confidence: 99%

Section: Mathematical Model Systematizationmentioning

confidence: 99%

Section: Mathematical Model Systematizationmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Design of CAN-based distributed control systems with optimized configuration

Godoy¹,

Sousa²,

Porto³

et al. 2010

J. Braz. Soc. Mech. Sci. & Eng.

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“…Complementando, é definida como uma metodologia de gestão à produção agrícola, cujas abordagens tecnológicas evidenciam a variabilidade espacial de seus fatores lógicos, para que a lavoura e sistemas de automação embarcados empregados sejam otimizados e customizados a determinados problemas (LULIO, 2011a). Estendem-se até a aquisição e tratamento para a coordenação homogênea das ações de intervenção cultural da lavoura (GODOY, 2007;GOZDOWSK & SAMBORSKI, 2007;TANGERINO, 2009 …”

Section: Revisão Bibliográfica Em Agricultura De Precisãounclassified

Fusão sensorial por classificação cognitiva ponderada no mapeamento de cenas naturais agrícolas para análise quali-quantitativa em citricultura

Lulio¹

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Computer systems are used in Precision Agriculture (PA) to provide relational sampling, accuracy and data processing required for agricultural practices and schemes, which are not common to conventional agriculture, demanding higher costs of production and research directed to the remote sensing for mapping and inspection of crop rows. Tasks are carried out using a priori On-the-Go sensors, and proprioceptive and exteroceptive ones, embedded instrumentation, geographic information and existing implements on production and farming, which these activities ensure during the steps of planting, maturation, maintenance and harvesting of a particular culture. Also, these tasks are aided with the use of terrestrial agricultural mobile robots such as autonomous vehicle platforms for locomotion between the crop rows in the acquisition of field data. Given this information and relating the investment and development of these technologies, the goal of this work is to assist the inspection, quantification and qualification of agricultural crops (citrus) of planting area through analyzing and identifying data for sensor fusion, associated with digital image processing, optical thermal imaging and optical flow sensors and reflectance, based on the extraction of real natural scenes objects, identifying items such as fruits, grasses, stems, branches and leaves, thus providing a qualitative and quantitative set of data analyzed culture. As of a computer vision system and sensor fusion, Gigabit Ethernet cameras, sonars, thermal camera, infrared optical flow sensors and monochrome CMOS sensors are embedded in two sides of the vehicle structure, with the same geometric center ratio of the agricultural mobile robot. After data acquisition, image and signal processing techniques are applied for non homogeneous region segmentation, and pattern recognition through statistical classifiers. Such techniques are programmed in MATLAB and OpenCV, embedded in a computer platform. Cognitive classifiers that perform pattern and classes matching are intended on a combination of weighted data fusion techniques, that during locomotion of the agricultural mobile robot, the steps of image processing and combination of parameters for classification are manipulated for analysis retrospectively, conflicting existing data with likely changes resulting in culture and biomass. Figura 3.6: Na sequência de imagens acima, da esquerda para direita tem-se a imagem visível, imagem NIR e imagem UVFL; na sequência de imagens abaixo, da esquerda para direita temse a imagem do fruto com irregularidade, segmentação usando CART, e segmentação usando LDA (Adaptado de BLASCO et al., 2007b) Figura 3.7: Etapas de segmentação e classificação, considerando o índice de diferença normalizado, o filtro de variância, componentes Cb e Cr, e inserção de rótulo no objeto encontrado, separado do plano de fundo (PAYNE et al., 2013) Figura 3.8: Imagens multimodais registradas de folhas de macieiras, apresentando sete níveis de patógenos que causam irregularidades na superfície, 21 d...

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Rede serial para comunicação de dados e controle em sistema embarcado: estudo de implementação da ISO 11783

Sakai¹

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The digital networks demonstrated to be an effective solution in automation. The connection of different modules from different manufacturers into a single bus for the exchange of data and control is a challenge for the agricultural machinery Brazilian industry, although this technology is consolidated in automobiles, aircraft and the factory floor. The benefits obtained with digital networks are obvious, but they need implementation of protocols networks. In the agricultural area, the international standard ISO 11783 shows strong potential to become the reference standard for the exchange of data between modules on tractors and agricultural implements. This standard, also known as ISOBUS, is in the advanced stage of development. It contains fourteen documents and its development is supported by groups called "Task Force" in Europe, USA, and recently in Brazil. Implementations of this standard are now being presented in the international market, in fairs and demonstrations of application of this technology. Brazil should invest and dominate the technology, to inquire after international compatibility in both the technological point of view as commercial. In this context, this work encourages the national development in applications with ISOBUS standard, presenting two studies of cases, whose modules communicate with equipment market compatible with the standard. These practical experiences complement academic works on this subject, which emerged in recent years in Brazil.

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Desenvolvimento de uma ferramenta de análise de desempenho de redes CAN (Controller Area Network) para aplicações em sistemas agrícolas

Cited by 10 publications

References 8 publications

Design of CAN-based distributed control systems with optimized configuration

Design of CAN-based distributed control systems with optimized configuration

Fusão sensorial por classificação cognitiva ponderada no mapeamento de cenas naturais agrícolas para análise quali-quantitativa em citricultura

Rede serial para comunicação de dados e controle em sistema embarcado: estudo de implementação da ISO 11783

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