基于拟合方程的水表误差曲线校准方法

摘要

The traditional mechanical water meters setting up the embedded computer system and characteristic correction algorithm and data processing software, they can be transformed into new type electronic water meter of wide range and high accuracy. In the past,water meter characteristic computer correction mostly adopts the look-up table method, the calibration workload is big, the calibration efficiency is low. This paper describes the correction methods based on the fitting equation, according to the water meter error curve change trend will curve part flat fan. If the correction section, and the corresponding linear equation be fitting, make water meter error curve control in smaller error scope, also make the correction efficiency greatly improved.%　　在传统机械水表上设置嵌入式计算机系统及特性校准算法和数据处理等软件，可将机械水表改造成宽量程高准确度的新型电子水表。水表特性的计算机校准过去大都采用查表法，致使校准工作量过大，校准效率低下。该文采用基于拟合直线方程的校准方法，根据水表误差曲线的变化趋势，将曲线平坦部分划分成若干校准段，并用相应的直线方程予以拟合，使水表误差曲线控制在较小的误差范围内，也使校准效率得以明显提高。