两级式太阳跟踪数字光电传感器设计  

Design of Two-stage Digital Photoelectric Sensor for Sun Tracker

作　　者：唐自豪 李鹏[1] 钱耀[1] 罗琦[1] 陈慧玲 张清杰[3] 

机构地区：[1]武汉理工大学机电学院,湖北武汉430070 [2]青海新能源(集团)有限公司,青海西宁810008 [3]武汉理工大学,材料复合新技术国家重点实验室,湖北武汉430070

出　　处：《仪表技术与传感器》2017年第10期1-6,共6页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(51272198);国家国际科技合作专项项目(2014DFA63070);青海省重点研发与转化计划项目(165111451100512)

摘　　要：基于四象限探测器和光敏电阻设计了一种可用于太阳双轴跟踪偏差补偿的两级式光电传感器,在跟踪偏差小于±2.5°时输出精确的偏差角度值,超出时则输出二进制的方位偏差信号。基于几何模型和太阳运动规律,讨论了跟踪偏差变化时两种信号的变化规律和转换过程。实验测试表明传感器的偏差检测精度达到0.1°,偏差补偿角达到±22.5°,满足实际应用需求,可为双轴太阳跟踪系统的设计安装、降低成本和提高跟踪精度提供理论和实践依据。A novel two-stage photoelectric sensor based on four-quadrant detector and photosensitive resistances was proposed for tracking deviation compensation of dual-axis sun tracker.It outputs accurate deviation angle when the deviation is within±2.5°,otherwise outputs binary deviation signals.The change rule and transition of two kinds of signals were discussed based on the geometry model and sun movement when tracking deviation changes.Field test shows the accuracy can reach 0.1° and field of view is ±22.5°.This sensor is able to satisfy practical requirement and provide theoretical and practical basis for design,installation,cost reduction and accuracy improvement of sun tracker.

关 键 词：太阳双轴跟踪 偏差补偿 四象限探测器 光敏电阻 二进制 转换 

分 类 号：TK519[动力工程及工程热物理—热能工程]