一种多功能照度计的设计.PDFVIP

计 算 机 系 统 应 用 2012 年 第 2 1 卷 第 3 期 ① 一种多功能照度计的设计 1 2 1 1 高英明 ，张环月 ，邹念育 ，康 哲 1(大连工业大学 光子学研究所，大连 116034) 2(大连理工大学 材料科学与工程学院，大连 116024) 摘 要：基于数字照度传感器 BH1750 实现了一种多功能照度计 GZ-100，除照度测量功能外，还具有温湿度测 量与无线通信功能。系统采用低电压的 STC12LE5A60S2 单片机，抗干扰能力强、应用电路最简单的射频收发芯 片 IA4420 ，数字照度传感器 BH1750 和温湿度传感器 SHT11。系统根据 IA4420 内部状态寄存器的值借助外部中 断收发数据，以 74HC164 驱动 4 个共阴极数码管的动态方法进行显示。最后进行了照度的对比测量，结果显示 GZ-100 能够满足一般的照度测量要求。 关键词：照度计；STC12LE5A60S2；IA4420 ；BH1750 Illuminance Meter Design with Multiple Functions 1 2 1 1 GAO Ying-Ming , ZHANG Huan-Yue , ZOU Nian-Yu , KANG Zhe 1(Research Institute of Photonics, Dalian Polytechnic University, Dalian 116034, China) 2(Department of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China) Abstract: A multiple function illuminance meter was developed based on BH1750, a digital ambient light sensor. Besides illuminance, the meter can measure temperature and humidity, even conduct wireless communication each other. Low voltage and low power Micro-controller STC12LE5A60S2 was used as processing unit, radio transceiver IA4420 with strong anti disturbance capacity and the simplest application circuit was used as communication element, SHT11 was used as sensor element, besides BH1750. A data Tx/Rx method through nIRQ pin of IA4420 was presented, which do Tx/Rx according to content of status register in interrupt service routine. Illuminance contrast measurement between commercial illuminance meters was done and results were given. Key words: illuminance meter; STC12C5A60S2; IA4420; BH1750 照度计是进行照度测量的专用仪器，而商品化的 换信息与进行分布式测量。 照度计大都功能单一且价格不菲。照度计测量探头的 敏感元件通常为硅光电池，为使得硅光电池的光谱响 1 系统硬件设计 应与人眼相一致，需要特殊的滤光片对入射光进行 修 1.1