A carregar...
Publicação
Utilização de smartphones na medição da luz
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 982.4 KB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
Atualmente, as tecnologias estão em constante evolução, e sendo o smartphone uma delas não poderia ficar para trás. Tornaram-se então equipamentos multifunções devido às suas elevadas capacidades computacionais e por incorporarem diversos sensores que possibilitam a captação e análise de sinais em tempo real, sendo por isso utilizados nos dias de hoje, com recurso a aplicações móveis, para medir a iluminância. Para se ter certeza de que o conjunto smartphone-aplicação é fidedigno, e não coloca em risco a segurança e saúde dos trabalhadores, é necessário testá-los. O objetivo principal deste estudo foi investigar a validade dos smartphones na medição da luz. Como amostra, utilizaram-se 11 smarthpones, sendo 6 do sistema operativo iOS e 5 do sistema operativo Android, e 6 aplicações, sendo 3 de cada um daqueles sistemas operativos. Os ensaios foram realizados em câmara escura, e os smartphones foram testados com lâmpadas LED com luzes de 3 temperaturas de cor diferentes (2700, 4000 e 6500K) e 4 níveis de iluminância. Todas as medições foram efetuadas com diferentes combinações smartphone-aplicação e com um luxímetro digital da Extech Instruments, modelo LT45, com um nível de exatidão de ±3%. Os resultados obtidos demonstraram que os smartphones ainda não são válidos para efetuar medições como o luxímetro, visto que os valores obtidos ainda são sobrestimados/subestimados, dependendo do tipo de sistema operativo. Logo, ao utilizar-se numa situação real de trabalho, tal poderia induzir o técnico em erro e gerar consequências nefastas para os trabalhadores.
Technologies, nowadays, are in constant evolution, and being the smartphone one of them, couldn’t be left behind. They became multifunctional equipment’s due to their high computational capacities and for incorporating multiple sensors that enable the capture and analysis of signals in real time, therefore they’re used, with the help of mobile applications, to measure illuminance. To be sure that the set of smartphone-app is trustworthy and doesn’t put in risk the health and safety of workers, it´s necessary to test them. The principle aim of this study was to investigate the validity of the smartphones in the measurement of light. As sample, were used 11 smartphones, being 6 of the iOS operating system and 5 of the Android operating system, and 6 applications, being 3 of each of those operating system. The essays were made in a dark chamber, and the smartphones were tested with LED lamps, with lights of 3 different colour temperature (2700, 4000 and 6500K) and 4 levels of illuminance. All the measurements were carried out with different combinations smartphone-app and with a digital luxmeter Extech Instruments, model LT45, with a precision level of ±3%. The obtained results demonstrate that smartphones are not valid for measurement as luxmeter, since that the results are overestimated/underestimated, depending on the type of operating system. Therefore, when using it in a real work situation, that could induce the technician in error and generate harmful consequences for the workers.
Technologies, nowadays, are in constant evolution, and being the smartphone one of them, couldn’t be left behind. They became multifunctional equipment’s due to their high computational capacities and for incorporating multiple sensors that enable the capture and analysis of signals in real time, therefore they’re used, with the help of mobile applications, to measure illuminance. To be sure that the set of smartphone-app is trustworthy and doesn’t put in risk the health and safety of workers, it´s necessary to test them. The principle aim of this study was to investigate the validity of the smartphones in the measurement of light. As sample, were used 11 smartphones, being 6 of the iOS operating system and 5 of the Android operating system, and 6 applications, being 3 of each of those operating system. The essays were made in a dark chamber, and the smartphones were tested with LED lamps, with lights of 3 different colour temperature (2700, 4000 and 6500K) and 4 levels of illuminance. All the measurements were carried out with different combinations smartphone-app and with a digital luxmeter Extech Instruments, model LT45, with a precision level of ±3%. The obtained results demonstrate that smartphones are not valid for measurement as luxmeter, since that the results are overestimated/underestimated, depending on the type of operating system. Therefore, when using it in a real work situation, that could induce the technician in error and generate harmful consequences for the workers.
Descrição
Palavras-chave
Android Aplicações Exatidão Iluminância IOS Luxímetro Medição Precisão Smartphones Temperatura de cor Accuracy Applications Illuminance Luxmeter Measurement Precision Smartphone Temperature of light