Measurement precision contribute to improving the security class and economic of boiler running and automatic level of whole plant . the smart measurement instrument of the boiler ’ s air flow designed in the thesis and the instrument can make the degree of accuracy get to . firstly , the thesis build the “ velocity - area ” method which is on basis of “ log - tchebycheff ” on the analyzing of basic measure method of boiler ’ s air flow . secondly , model86 averaging pitot tube was selected the right model of flow transducer which can pickoff the differential pressure and static pressure . modelc264 which made in setra system corp . u . s . a was selected as ultra low differential pressure transmitter . a good flow of boiler ’ s air was calculated by offsetting pressure and temperature . finally , numeroscope was designed with z80cpu and other chips 精确的监测有助于提高锅炉燃烧的安全型、经济性，也有助于提高电厂的整体自动化水平。本文设计的智能化锅炉风量测量装置能够实现对锅炉送风的精确测量，精度可达。本文首先研究锅炉送风矩形大管道测量理论，提出在流来流量测量测点布置基于“对数-切比雪夫”法的速度-面积法。
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