流量计量的软误差分析及补偿技术研究

Soft Error Analysis and Compensating Technical Research of the Flow Measurement

在分析天然气微机计量管理系统功能和特点的基础上,对硬件结构难以解决的软误差进行了分析,在计量软件上通过时域能量与频域能量谱函数相同的理论在线快速查找相似的时间子序列,采用粗糙度系数的二元全区间插值技术,计算机系统时间的标定和在线修正,动态测试数据的小波软阈值滤波方法,对流量的计量进行补算和修正,提高了计量的准确性和科学性。

Based on analyzing the function and characteristic of the administrative system of the natural gas computer measurement, the soft error which is difficult to solve to the structure of the hardware has been analysed . The theory that time domain energy spectrum function is same as frequency domain energy spectrum function is applied to search for the similar time subsequence fast. Adopting the whole block inserting value technology of two dimonions of roughness coefficient, computer system time is standard with revising online. The dynamic measurement data with the strain wave method of the little wave soft threshold value improved the accuracy of flow measurement.