为实现对使用中超声流量计准确度的实时监测,基于高压环道式气体流量标准装置,采用随机森林算法,建立了信号参数(含声速偏差)与示值误差间关系的超声流量计预测模型,同时结合LabVIEW软件开发平台研制出一套超声流量计实时使用中检验系统。基于该系统,可实现超声流量计信号质量参数、流态指标参数、声速指标参数3类信号参数的实时采集,并利用预测模型开展流量计示值误差的同步预测。在160~800m3/h范围内的实验测试表明,流量计示值误差与系统预测误差间的偏差为±0.42%。
Abstract
To realize a real-time monitoring of ultrasonic flowmeter accuracy, a real-time in-use measurement system of ultrasonic flowmeter based on the high pressure closed loop facility was developed, which was combined with a prediction model of ultrasonic flowmeter with the relationship between signal parameters (including sound velocity deviation) and indicating value error based on random forest algorithm, and LabVIEW software platform. Within the measurement system, three characteristic signals of ultrasonic flowmeters, including signal quality, flow state index, sound speed index, can be real-time collected, and the simultaneous prediction of flowmeter indication error from the prediction model was obtained. The experimental tests were carried out in the range of 160~800m3/h, which showed that the deviation between the real error and the prediction error of the flowmeter was within the range of±0.42%.
关键词
超声流量计 /
使用中检验 /
随机森林算法 /
机器学习 /
LabVIEW
Key words
ultrasonic flowmeter /
in-use measurement /
random forest algorithm /
machine learning /
LabVIEW
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基金
中国计量科学研究院基本科研业务费项目(26-AKYZD2107-1)
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