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太阳能环境参数测试仪的系统电路设计

作者：时间：2017-02-06 来源：网络

　　通信模块

　　测试仪通过RS485工业总线与PC 机进行通信，其硬件接口电路如图5所示。

　　经实验测试，该环境参数测试仪温度测量显示精度可以达到0.1℃，湿度精确到0.1%，照度可以精确到11x。由于主要器件均为I2C 数字接口，故本测试仪还有结构简单、易维护、可扩展性强等特点，具有很高的实用价值；另外，独特的双电源供电方式更扩展了它的适用范围。

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关键词： 太阳能环境参数测试

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