CAJ | 학술논문

脉冲流量计输出的频率信号能够在较宽范围内保持良好的重复性，但其仪表系数只能在较窄的范围内保持恒定，从而制约了其测量精度。该设计提出以最小二乘法实现对脉冲流量计仪表系数的非线性修正，该方法基于LabWindows／CVI来完成算法实现和流量修正软件的开发设计。最小二乘法的求解采用基于正交多项式集的构造途径，以相关系数对其拟合结果进行效果评价。频率测量采用嵌入式设备研华PCI－1710数据采集卡采集脉冲信号，并使用脉冲计数方式，解决了测量误差在总流量中的累积问题。软件为第三方软件提供了DDE通信的设备接口，实现了数据传输的标准化。该设计通过嵌入式控制手段模拟运行系统实现对流量的模拟测量，用测量所得数据生成的模型与标准模型相比较，结果表明该方法不仅提高了流量计的计量精度，而且展宽了其量程范围。
맥충류량계수출적빈솔신호능구재교관범위내보지량호적중복성，단기의표계수지능재교착적범위내보지항정，종이제약료기측량정도。해설계제출이최소이승법실현대맥충류량계의표계수적비선성수정，해방법기우LabWindows／CVI래완성산법실현화류량수정연건적개발설계。최소이승법적구해채용기우정교다항식집적구조도경，이상관계수대기의합결과진행효과평개。빈솔측량채용감입식설비연화PCI－1710수거채집잡채집맥충신호，병사용맥충계수방식，해결료측량오차재총류량중적루적문제。연건위제삼방연건제공료DDE통신적설비접구，실현료수거전수적표준화。해설계통과감입식공제수단모의운행계통실현대류량적모의측량，용측량소득수거생성적모형여표준모형상비교，결과표명해방법불부제고료류량계적계량정도，이차전관료기량정범위。
Pulse flowmeter output frequency signal can keep good repeatability in a wider scope, but the instrument coefficient can maintain a constant within a narrow range, thereby restricting its measuring accuracy.This design is on the least squares method to implement the algorithm, which is about non-linear modifying of pulse flowmeter instrument coefficient, also implement the algorithm and that the soft-ware development and design based on LabWindows/CVI.It brings forward the way of pulse countinguses embedded system Advantech PCI-1710 data acquisition card in flow measurement, to solve the problem that measurement error cumulates in the total flow.This software provides a DDE communications equip-ment interfaces for third-party software, and achieves the standardization of data transmission.The de-sign through embedded system simulation systems, accomplishes the function of simulation to flow meas-urement.After compare the model generated by the measured data with the standard model, it turns out that not only the measuring accuracy of flowmeter has been improved, but also the measuring range has been broadened.