Bibliographic Details
| Title: |
Sensor sonar de movimento para ensino de Física experimental. |
| Authors: |
da Rocha, Fábio Saraiva1 fabio.rocha@unipampa.edu.br, Guadagnini, Paulo Henrique2 |
| Source: |
Latin-American Journal of Physics Education. May2010, Vol. 4 Issue 2, p306-315. 10p. 1 Color Photograph, 4 Diagrams, 1 Chart, 1 Graph. |
| Subject Terms: |
*Physics education, Sonar, Verniers, Embedded computer systems, Detectors |
| Abstract (English): |
This work presents a sonar sensor project for motion studies in experimental physics based on the ultrasound pulse-eco technique. Details of the project from both hardware and embedded software are discussed from its most basic components. Physical tests relating to performance were carried out by comparing this sensor with a professional ruler as well as another sonar sensor, brand Vernier, available at national market. These tests indicate the resolution of our motion sensor is about 1 cm, and absolute error relating to the standard rule stays in the range of 1 cm to 2 cm. Our sensor is also tested by applying it on the task of describing position versus time concerning to the movement of a cylinder descending a tilted plane, rolling without slipping, for the which a maximum deviation of 5% in relation to the Vernier reference sensor is obtained. [ABSTRACT FROM AUTHOR] |
| Abstract (Spanish): |
Apresentamos neste trabalho o projeto de construção de um sensor sonar para uso no estudo de movimentos em física experimental baseado na técnica de pulso-eco de ultrasom. O projeto de construção do sensor de movimento é discutido em detalhes a partir de seus componentes mais básicos de hardware até o software embarcado. Efetuamos testes físicos de comparação do desempenho deste sensor com um instrumento de medida de distância (régua profissional) e também com outro sensor sonar de movimento, marca Vernier, disponível no mercado nacional. Os resultados desses testes indicam que a resolução do nosso sensor é cerca de 1 cm, e o erro absoluto em relação à régua padrão ficou entre 1 cm e 2 cm. Aplicamos o sensor sonar na tarefa de descrever os dados de posição e tempo relativos ao movimento de um cilindro que desce um plano inclinado num rolamento sem escorregamento, obtendo-se um desvio máximo de 5% em relação ao sensor comercial de referência Vernier. [ABSTRACT FROM AUTHOR] |
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| Database: |
Education Research Complete |
