Desing of High-Resolution ADC for Light Sensing in Solar Tracking and Automatic Energy Harvester System Applied for Blind

• Main Authors: BAI,ZHI-REN, 白智仁
• Other Authors: Lee,DA-HUEI
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/rz4m7e

碩士 === 南臺科技大學 === 電子工程系 === 106 === Global warming and energy shortages have become increasingly serious issues, while environmental protection and green energy have received global attention. In recent years, the Taiwan Government has also been promoting policies of green building, whose direction of development is saving energy, reducing carbon emissions, and environmental conservation. Green buildings do not follow the traditional ideas of architecture; for example, they use solar energy sources for power supply so as to reduce carbon dioxide emissions and energy consumption. This paper proposed a power generation device that combined solar energy and wind power, which could improve the shortcomings of traditional power generation devices as well as achieve the utility of 24 hours a day. The aim of the study was to improve the defect of traditional power generation devices, which was single energy harvesting. At the same time, in combination of solar panels and piezoelectric sheets, the new device could harvest solar energy and wind power in the natural world and achieve the functions of multi-energy and 24/7 harvesting. It was also combined with smart technology to have automatic device switching, solar tracking system, real-time remote monitoring, etc., so that the power generation device could achieve maximum efficiency without sacrificing convenience. In addition, in order to make the power generation device more widely used, the study presented its project in the form of blinds, which could be applied to office buildings, general residences, and large-scale factories. This paper was dedicated to making traditional power generation devices more intellectual and have more future development. In order to improve the accuracy of determining solar position, a low-speed, low-power A/D converter with high-resolution was needed to convert the analog signals detected by the light sensor into digital signals, on which the back end system would perform a digital analysis. The paper proposed a sigma–delta A/D converter, which could meet the above conditions the most. In terms of system circuit realization, it used the CMOS process recipe of TSMC 0.18μm to design and simulate. When the sampling frequency was 2.5MHz and oversampling rate 256, SNR could reach 95dB, equivalent to 15 significant bits and 4.95mW power consumption. Keyword：Piezoelectric sheet, Energy management, Multi-energy, Automation, Sigma–delta A/D converter