Vibration Measurement
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Continuously monitored lactose crystallization in a vibrated bed
Resumo O estudo visa avaliar a distribuição de tamanho cristalino e a microscopia da fase cristalina na cristalização isotérmica de lactose, usando alta concentração de sementes (fase densa). O monitoramento in-line foi realizado utilizando as sondas de medição de reflexão de feixe focalizado (FBRM) e de medição de visão de partículas (PVM), um
Braz. J. Food Technol.. Publicado em: 14/11/2019
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2. A MEASUREMENT SYSTEM BASED ON LiDAR TECHNOLOGY TO CHARACTERIZE THE CANOPY OF SUGARCANE PLANTS
ABSTRACT Laser sensor applications associated with LiDAR (Light Detection and Ranging) technology on platforms allow the evaluation of crop and forest biomass in a non-invasive way. This study presents the development of a measurement system based on LiDAR technology aimed at the proposed assessment of the height of sugarcane plants during the pre-harvest pe
Eng. Agríc.. Publicado em: 25/04/2019
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3. Medición del módulo de Young en metales mediante la técnica de excitación por impulso
ABSTRACT The impulse excitation, as non-destructive technique, allows to determine the elastic constants of materials by means of measurement of natural frequency of vibration of bars in different modes, excited by an impact in a point. In this work, the Young’s modulus of copper, aluminum and copper-based alloys samples was determined. The measurements we
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Measurement of Strain-Amplitude Dependent Internal Friction with Torsion Pendulum and Vibration Reed Methods
In the traditional standard of internal friction measurement the torsion pendulum and vibration reed were preferentially recommended where the issue of strain amplitude dependence of internal friction was not concerned. To more precisely measure the internal friction and modulus at various strain amplitude, in this paper the strain amplitude dependence of in
Mat. Res.. Publicado em: 28/05/2018
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5. Measurement and evaluation of human exposure to vibration transmitted to hand-arm system during leisure cyclist activity
INTRODUCTION: The cycling activity has increased in recent years, either as a means of leisure or physical activity or as means of transport. Discomfort is one of the main complaints for cyclists, especially when related to the type o pavement they use while riding. This work presents a study of measurement and evaluation of human exposure to hand-arm vibrat
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-12
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6. Medição e avaliação da exposição humana à vibração transmitida ao sistema mão-braço durante a atividade ciclística / Measurement and evaluation of human exposure to hand-arm vibration in cycling activity 2010
Este trabalho apresenta um estudo de medição e avaliação da exposição humana à vibração transmitida ao sistema mão-braço durante a atividade ciclística. Medições de vibração são realizadas para três diferentes tipos de pavimento, asfalto (AS), placas moldadas “in loco” de concreto (PC) e blocos intertravados de concreto (BI), utilizando
Publicado em: 2010
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7. Eigenvalue based inverse model of beam for structural modification and diagnostics: examples of using
In the work, in order to solve the inverse problem, i.e. the problem of finding values of the additional quantities (mass, elasticity), the beam inverse model was proposed. Analysis of this model allows finding such a value of additional mass (elasticity) as a function of its localization so that the free vibration frequency changes to desirable value. The c
Latin American Journal of Solids and Structures. Publicado em: 2010
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8. Análise comparativa da amplitude de vibração das pregas vocais e do coeficiente de contato durante a emissão da vogal /ɛ/ prolongada e vibração sonorizada de lábios e língua / Comparative analysis of the amplitude of vibration of the vocal folds and the coefficient of contact during the utterance of the sustained vowel / ? / and the lips and tongue trills
Exercises of audible vibration are widely used for the treatment of dysphonia and vocal preparation of professional voice users. There is little research done studying vocal physiology during exercise. The aim of this study is to compare the differences in cordal vibration during the exercises of lips and tongue trills and the sustained vowel / ? / as to the
Publicado em: 2010
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9. WHOLE-BODY VIBRATION SEAT TRACTOR ANALISYS / ANÁLISE DO NÍVEL DE VIBRAÇÕES NOS ASSENTOS DE TRATORES AGRÍCOLAS
Nowadays, whole-body vibration is widely recognized as risk factor for worker all around the world. Most of published works on this subject was developed in main research centers. The aims of this study were (1) to determine the vertical whole-body vibration levels on the tractor seat, (2) to determine the combination influence between three tire inflation p
Publicado em: 2007
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10. Modal parameter identification of structures and rotating machine by adaptative filter / Identificação de parametros modais de estruturas e maquinas rotativas atraves da filtragem adaptativa
This work investigates the use of adaptive filters for parameter identification. Although adaptive algorithms are still rarely utilized in the mechanical engineering field, the recursive least square and recursive least square with QR decomposition methods can be implemented based on the second ordinary differential equations in order to characterize the mod
Publicado em: 2007
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11. Ladrilhos e revestimentos hidráulicos de alto desempenho / High performance hydraulic tiles and coverings
The hydraulic tiles are coverings produced by using hydraulic binders, whose production technology has not follow the great technological evolution of the concretes, the availabilities of new materials and the usual techniques in recent years, thus they have lost space and competition in the market due to their handicraft characteristic of production. This w
Publicado em: 2007
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12. DEVELOPMENT OF A VIBROIMPACT DEVICE / DESENVOLVIMENTO DE UM DISPOSITIVO GERADOR DE VIBROIMPACTO
Hard rock drilling is still a great challenge for oil companies. One current line of research involves combining the two existing drilling techniques in order to enhance the rate of penetration. This new technique is called Resonance Hammer Drilling. This dissertation proposes the design and development of the first prototype that will operate in resonance,
Publicado em: 2006