Assessment of Seed Viability by Laser Speckle Techniques

This work presents a new technique as a potential methodology to analyse seeds. The technology is known as dynamic speckle, or biospeckle, an optical phenomenon produced when active materials, such as biological tissue, are illuminated by laser light. In the present work, the biological activity of seed tissues has been inferred from quantitative and qualitative measurements of their speckle activity. The aim is to show that the biospeckle technique has a potential as a methodology to assess seed viability. One aspect that needs to be investigated is how the water content in the seeds affects bio-speckle activity. An experiment has been performed to determine the effect of humidity in the results. Seed activity for different levels of humidity was determined using quantitative and qualitative methods. Also, in others experiments, viable and non-viable seeds with different specific humidity levels could be classified using the same technique

Assessment of Seed Viability by Laser Speckle Techniques

This work presents a new technique as a potential methodology to analyse seeds. The technology is known as dynamic speckle, or biospeckle, an optical phenomenon produced when active materials, such as biological tissue, are illuminated by laser light. In the present work, the biological activity of seed tissues has been inferred from quantitative and qualitative measurements of their speckle activity. The aim is to show that the biospeckle technique has a potential as a methodology to assess seed viability. One aspect that needs to be investigated is how the water content in the seeds affects bio-speckle activity. An experiment has been performed to determine the effect of humidity in the results. Seed activity for different levels of humidity was determined using quantitative and qualitative methods. Also, in others experiments, viable and non-viable seeds with different specific humidity levels could be classified using the same technique.Facultad de Ingeniería (FI

Assessment of Seed Viability by Laser Speckle Techniques

This work presents a new technique as a potential methodology to analyse seeds. The technology is known as dynamic speckle, or biospeckle, an optical phenomenon produced when active materials, such as biological tissue, are illuminated by laser light. In the present work, the biological activity of seed tissues has been inferred from quantitative and qualitative measurements of their speckle activity. The aim is to show that the biospeckle technique has a potential as a methodology to assess seed viability. One aspect that needs to be investigated is how the water content in the seeds affects bio-speckle activity. An experiment has been performed to determine the effect of humidity in the results. Seed activity for different levels of humidity was determined using quantitative and qualitative methods. Also, in others experiments, viable and non-viable seeds with different specific humidity levels could be classified using the same technique.Facultad de Ingeniería (FI

Assessment of Seed Viability by Laser Speckle Techniques

This work presents a new technique as a potential methodology to analyse seeds. The technology is known as dynamic speckle, or biospeckle, an optical phenomenon produced when active materials, such as biological tissue, are illuminated by laser light. In the present work, the biological activity of seed tissues has been inferred from quantitative and qualitative measurements of their speckle activity. The aim is to show that the biospeckle technique has a potential as a methodology to assess seed viability. One aspect that needs to be investigated is how the water content in the seeds affects bio-speckle activity. An experiment has been performed to determine the effect of humidity in the results. Seed activity for different levels of humidity was determined using quantitative and qualitative methods. Also, in others experiments, viable and non-viable seeds with different specific humidity levels could be classified using the same technique.Facultad de Ingeniería (FI

Application of optical method in measuring mechanical vibrations in a cantilever beam

The pertinent literature discloses a family of optical profile measuring techniques highlighting the moiré methods. The Moiré technique is based on the interference of two superimposed optical grids which produce fringe patterns which can be processed to analyze the dynamic measurement in materials mechanical behavior. The goal of this research is to experimentally determine the mechanical displacement of a slim cantilever beam by means of Moiré technique with Phase Shift. Photomechanical experimental arrangement included a digital camera, a multimedia projector and a PC. The occurrence of oscillations has been adequately analyzed. The results showed data from which useful information can withdraw, being of great importance to support agricultural machinery projects and development.371849

Workflow and toolchain for developing the automotive software according AUTOSAR standard at a Virtual-ECU

The increasing demand of new functionalities in next generation vehicles, leads to a growth of the complexity level for the E/E automotive systems. On the same way, the automotive software also tends to follow the same pace, so new methods should be adopted to deal with this scenario of complexity. The next generation of automotive embedded software is rapidly migrating to the AUTOSAR standard, which is an architectural composition of software components idealized to establish an open industry standard for the automotive industry. AUTOSAR aims to increase the reuse of these software components, in particular between different vehicle platforms, and between OEMs and suppliers. Inside this development process, software control suppliers are able to check if the system functionalities are attending to the requirements already in preliminary phases, even if the ECU is not yet available. In this paper the authors show the workflow to develop a virtual validation based on the AUTOSAR standard with a Virtual ECU (V-ECU) using a toolchain consisting of dSPACE (SystemDesk, VEOS and TargetLink) and MathWorks (Matlab, Simulink and Stateflow) software. The simulation of the architecture has been realized considering the communication inside a same V-ECU and also between two different V-ECUs considering a distributed architecture. As result, a point-to-point explanation about AUTOSAR methodology is done to show how the process is done.86987525. IEEE International Symposium on Industrial Electronics (ISIE

MOIRÉ INTEFEROMETRY APPLIED TO PLANT ARCHITECTURAL STUDIES / MOIRÉ INTERFEROMÉTRICO APLICADO AO ESTUDO DA ARQUITETURA DE PLANTAS

ABSTRACTPlant architecture research subjects are of significant importance to genetics, photosynthesis, transpiration, crop-machine mechanical relationship, etc. In this sense, this research work had been carried in developing a new technique to generate the three dimensional view of plant shape. In this work the plant architecture determination will be carried out by means of a phase shift moiré method. The importance of the proposed method is based on the application of a sequence of fourgrids out of phase by an angle of π/2 radians one from each other. A digital camera was employed to capture the moiré patterns, which will generate the image to be processed. The procedure of image analysis involved softwares as Microsoft Powerpoint, Coreldraw and Idrisi. The use of a highly continuous sinusoidal grid, of a collimated light beam, of a higher resolution Charge Coupled Device Camera, as well as the superposition of image discontinuities during the unwrapping procedureincluded in the phase shifting method, avoided noise occurrence satisfactorily, improving image quality.The conception of tests leading to height determination to generate a topographic description of a plant model was conceived based on optical moiré techniques. Obtained resultsreveal a great potential of the proposed method in determining plant architecture with high precision, at low cost and being not time demanding.Keywords: Moiré; Interferometry, Plant Architecture

Determinação da topografia de uma fruta pela técnica de moiré de sombra com multiplicação de franjas Fruit profilometry based on shadow Moiré techniques

As técnicas de moiré (TM) são um conjunto de técnicas, baseadas no fenômeno de moiré, mais comumente utilizadas em perfilometria, devido à sua simplicidade e rapidez de medição. O fenômeno de moiré consiste na interferência causada pela sobreposição de duas estruturas periódicas (retículos), sendo a TM de sombra com multiplicação de franjas mais sensível que os métodos tradicionais, além de diminuir os efeitos da diferença de iluminação na superfície do objeto em estudo. Objetivou-se com este trabalho gerar um Modelo Digital de Elevação (MDE) de uma pêra pela TM de sombra com multiplicação de franjas e compará-lo a um outro modelo gerado a partir de um scanner 3D. Para este trabalho, foram utilizados um modelo de uma pêra, em escala 1:1, confeccionado em parafina e um esquema experimental constituído de um retículo de moiré, iluminador e câmera fotográfica digital. Pelos resultados, verifica-se uma alta correlação entre os MDE obtidos pelos dois métodos. A TM de sombra com multiplicação de franjas gerou um MDE que reproduz satisfatoriamente a topografia da pêra.<br>The Moiré Techniques (MT) are a group of techniques based on the moiré phenomenon, which are commonly used in profilometry, due to your simplicity and measurement speed. The moiré phenomenon consists of the interference caused by the overlapping of two periodic structures or grids. Shadow TM with multiplication of fringes is more sensitive than the traditional method and besides, they reduce the effects of the illumination difference in the surface of the object in study. The objective of this work was to generate a digital model of the surface of the pear for shadow TM with multiplication of fringes and to compare with another model generated starting from scanner 3D. For this, a model of a pear, in scale 1:1, made in paraffin and an experimental set up outline with moiré grid, light and digital photographic camera were used. The results showed a high correlation among the results from the two methods. Shadow TM with multiplication of fringes gave a satisfactory determination of topography of the pear