液体活塞式压力计校准自动化研究  

Research on Automated Calibration of Hydraulic Piston Gauges

作　　者：王博文 杨远超[1] 庞桂兵[2] 马坤 悦进[1] 黄谦 WANG Bowen;YANG Yuanchao;PANG Guibing;MA Kun;YUE Jin;HUANG Qian(National Institute of Metrology,Beijing 100029,China;College of Mechanical Engineering and Automation,Dalian Polytechnic University,Dalian,Liaoning 116034,China)

机构地区：[1]中国计量科学研究院,北京100029 [2]大连工业大学机械工程与自动化学院,辽宁大连116034

出　　处：《计量学报》2024年第11期1695-1701,共7页Acta Metrologica Sinica

基　　金：中国计量科学研究院基本科研业务费(AKYZD2303-2,AKYZZ2305)。

摘　　要：利用高精度压力传感器,通过理论分析、管路设计、程序编写,研制了1~120 MPa范围液体活塞式压力计校准的自动化装置。对该传感器的线性系数及长期稳定性进行了测试,结果表明:该传感器线性系数与1的偏差小于±4×10^(-4);通过与传统校准方法的比较,验证了该装置应用于中国计量科学研究院(NIM)压力基准量值传递工作的可靠性;应用该装置对起始平衡法和直接平衡法两种校准方法的结果进行了比较,验证了两种方法的一致性。应用该自动化装置校准液体活塞式压力计有效面积的相对扩展不确定度为32×10^(-6)(k=2),其形变系数的扩展不确定度为1.8×10^(-7)/MPa(k=2),校准所需时间比传统方法大幅度减少。Using a high-resolution pressure transducer,an automated calibration system for hydraulic piston gauges in the range of 1~120 MPa has been developed based on the theoretical analysis,manifold design and programming.The transducers'linear coefficients and its long-term stability were tested,and the results showed that the deviations of linear coefficients from 1 were less than±4×10^(-4).Comparing with the traditional calibration method,the reliability of the developed system for the dissemination of pressure SI-unit from the NIM primary pressure standard has been demonstrated.The calibration results by two methods,the so-calledΔp-method and p-method,were compared using the automated system,and the consistency of the two methods was verified.By using the automated system for the calibration of hydraulic piston gauges,the relative expanded uncertainty of the calibrated effective area is 32×10^(-6)(k=2),and the expanded uncertainty of the calibrated distortion coefficient is 1.8×10^(-7)/MPa(k=2).The time required for calibration is significantly reduced compared to traditional methods.

关 键 词：压力计量 液体活塞式压力计 自动化校准 有效面积 形变系数 不确定度 

分 类 号：TB935[一般工业技术—计量学]