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并联接入式流量测量方法与串联式测量方法相比,接入简单,装卸不需要破坏管道.引入基准流量,根据基准流量发生前后压缩气体的压力变化率可以求解泄漏流量;采用基于非线性微分跟踪器的滤波方法对压力信号滤波,有效消除了噪声的影响.实验结果表明:并连接入式的测量方法测量精度可达到满量程3%,重复精度可达满量程3%,适用于气动节能工业.
Compared with the tandem measurement method, the parallel connection-type flow measurement method has simple access and does not need to damage the pipeline when loading and unloading.The reference flow rate can be used to solve the leakage flow rate based on the pressure change rate of the compressed gas before and after the reference flow rate. Based on nonlinear differential The filtering method of the tracker filter the pressure signal and effectively eliminate the influence of noise.The experimental results show that the measurement accuracy of the connected measuring method can reach 3% of the full scale and the repeatability can reach 3% of the full scale, which is suitable for the pneumatic energy saving industry.