针对常规浊度测量方法受背景光影响大的问题,采用了数字锁相放大原理与常规浊度测量相结合的方法对微弱光电信号进行处理。采用数字正交锁相放大技术提取待检测信号的幅值与相位,消除了信号延迟及环境背景光的影响,有效提升该系统检测精度、范围及被检测信号信噪比。通过对系统进行优化,实现了浊度检测仪器的微型化和低成本化。利用所研制微型浊度检测仪器的实际测试实验表明,总体检测精度为±3%FS,测量范围为0～2 00
The compilation of 1:250,000 vegetation type map in the North-South transitional zone and 1:50,000 vegetation type maps in typical mountainous areas is one of the main tasks of Integrated Scientific I
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