Constru??o, calibra??o e an?lise de desempenho de um piran?metro de baixo custo, baseado no modelo Kimball-Hobbs

• Main Author: Naziazeno, Ronaldo Nascimento
• Other Authors: CPF:25094955420
• Format: Others
• Language: Portuguese
• Published: Universidade Federal do Rio Grande do Norte 2014
• Subjects: Engenharia mec?nica; piran?metro de baixo custo; modelo Kimball-Hobbs; CNPQ::ENGENHARIAS::ENGENHARIA MECANICA
• Online Access: http://repositorio.ufrn.br:8080/jspui/handle/123456789/15559

Made available in DSpace on 2014-12-17T14:57:48Z (GMT). No. of bitstreams: 1 RonaldoNN.pdf: 1246608 bytes, checksum: ba703452ce98a68ff395f5b2be6240d4 (MD5) Previous issue date: 2009-04-24 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior === In this work a pyrometer using the classic model of Kimball-Hobbs was developed, tested and calibrated. The solar radiation is verified through the temperature difference between the sensible elements covered by absorbing (black) and reflecting (white) pigmentations of the incoming radiation. The photoacoustic technique was used to optimize the choice of the pigments. Methodologies associated with linearity, thermo-variation, sensibility, response time and distance are also presented. To correctly classify the results, the international standard ISO 9060 as well as indicative parameters of World Meteorological Organization (WMO) are used. In addition a system of data acquisition of two channels with 12 bits, constructed during the this time, was used to measure the global solar radiation on the ground by the pyrometer and also by another pyrometer certified in the case of Keep & zonen. The results statistically show, through the hypothesis test presented here, that both equipments find population average with 95% of correctness === Nesse trabalho foi desenvolvido, testado, calibrado e classificado um prot?tipo de piran?metro, baseado no cl?ssico modelo Kimball-Hobbs. A irradia??o solar ? verificada a partir da diferen?a de temperatura entre elementos sens?veis recobertos com pigmenta??es absorvedora (preta) e refletora (branca). A otimiza??o na escolha dos pigmentos se deu a partir da t?cnica fotoac?stica. Metodologias associadas a linearidade, termovaria??o, sensibilidade, tempo de resposta, dist?ncia tamb?m s?o apresentadas. Para a classifica??o utiliza-se a norma internacional IS0 9060, al?m dos par?metros indicativos da World Meteorological Organization, WMO. Apresenta-se ainda um sistema de aquisi??o de 2 canais com 12 bits, desenvolvido ao longo do trabalho, utilizado para a medi??o da irradia??o solar global no solo pelo prot?tipo, e por um piran?metro certificado no caso um Keep&zonen. Tais resultados mostram estatisticamente, por meio de teste de hip?tese aqui apresentados, que ambos os equipamentos produzem popula??es de m?dias iguais com 95% de certeza