高精度智能浮子流量计的研制

Development of Smart and High-precision Float Flow Meter

介绍了一种利用磁阻传感器对浮子高度进行检测的新方法,在此基础上设计了以STM32为核心微处理器的智能金属管浮子流量计。鉴于磁场分布的复杂性,很难通过理论的方法得到传感器输出信号与浮子高度(或流量)之间的对应关系,以实验数据为基础,分别采用拟合曲线法和分段线性修正法得到传感器输出与流量之间的关系表达式。通过对比实验表明,拟合曲线法测量精度优于分段线性修正法。此外为减小温度漂移对磁阻传感器输出信号的影响,系统在流量修正前增加了温度补偿环节,提高了系统的测量精度。

A new method using magnetoresistive sensor detects the height of the float is introduced in this article,based on that designed a smart metal tube flow meter with microprocessor to the core.The complexity distribution of the magnetic field,it＇s difficult to obtain correspondence equation between the output of sensor and the float height（or flow rate） by the theoretical method.So it uses curve fitting and piecewise linear correction to obtain that equation by experimental data.