单片微机控制相关流量测量  

作　　者：戴跃伟[1] 

机构地区：[1]南京理工大学

出　　处：《电脑开发与应用》1997年第1期25-27,31,共4页Computer Development & Applications

摘　　要：在阐述了相关流量测量原理的基础上，描述了一种基于“极性重合”原理，采用两片８０３１单片微机构成的主从式结构，软件采用优化搜索算法的新型相关器的设计，该相关器具有“极性重合法”不能保证足够的测量范围，又有“零点穿越法”对相关函数搜索的分辨率不高的高精度，且无需专门的硬件延时电路。将其用到ＣＸＬ－Ｂ型超声波相关流量计上，经测试和运行，测量精度可达１％～３％On the basis of the description of correlation flow measurement principle,the paper introduces a “polarity coincidence”principle,which adopt two 8031 SCP to design a new correlator which is a principal and subordinate one and its software uses a optimal search algorithm.The correlator provides a sufficient measurement range that“polarity coincidence mode”can't give,and a high accuracy that“zero point transition method”can't obtain for the resolution of correlative function search,and doesn't need any hardware delay circuit.The correlator has been used in CXL-B ultrasonic correlative flowmeter,and its measurement accurecy has reached 1%～3% after testing and running.

关 键 词：流量测量 相关流量 微机控制 自动测量仪表 

分 类 号：TH814[机械工程—仪器科学与技术] TP216.1[机械工程—精密仪器及机械]