Application and Analysis of Indoor Low Illumination Photometer

• Main Authors: Fu-Wei Chu, 初福威
• Other Authors: 謝振榆
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/8s4rq2

碩士 === 國立虎尾科技大學 === 光電與材料科技研究所 === 100 === As for the human eyes, when the illumination intensity is too low, the human eyes will easily lead to eye fatigue. On the contrary, if the illumination intensity is too high due to intense light, excessive waste of electricity will undoubtedly occur. In this thesis, the Holtek microcontroller HT46R64, Solteamopto photoelectric light sensor JSA-1116, and JSA-3111B are used to convert the strength of the light intensity into voltage; analog-to-digital converter (ADC) is employed to transform the analog signals into digital ones. Finally, the ADC results are displayed via the help of microcontroller. For various environments, users need to have the appropriate illumination condition to match the actual requirements for book-reading, requiring a range of lux from 300 to 500. Our motivation is to devise a compact photometer for indoor illumination, where the detection range is between 0 and 1000 lux. Due to the cost and wide measurement ranges of these photometer products available in the market, this thesis is intended to design a low cost, portable photometer; real-time measurement task can always be conducted under any desk lamp illumination scenario, and the estimated cost is around NT$399.