仪器仪表用户
儀器儀錶用戶
의기의표용호
Instrumentation Customer
2015年
6期
43-46,42
,共5页
科氏质量流量计%灵敏度%温度补偿%静态称重法
科氏質量流量計%靈敏度%溫度補償%靜態稱重法
과씨질량류량계%령민도%온도보상%정태칭중법
coriolis mass flowmeter%sensitivity%temperature compensation%static weighting method
科氏质量流量传感器(Coriolis Mass Flowmeter，简称CMF)是高精度直接敏感流体质量流量的多参数测量仪表，精度高，重复性好。随着质量流量计的广泛应用，用户逐渐开始关注外界因素产生的测量误差，其中流体温度对测量精度的影响是用户关注的主要误差之一。本文从科氏质量流量计的敏感机理出发，建立流量计的灵敏度模型，并依据材料的弹性模量随温度变化的模型，建立了流量计的灵敏度和温度的补偿模型。改造现有的静态称重法质量流量计标定装置，对建模的流量计进行精度与流体温度的实验研究。理论与实验结果表明：科氏质量流量计随着流体温度的升高，将产生正向的测量误差，误差与温度的关系为二次曲线关系，在特定的温度范围内，可以简化为直线关系；利用论文研究的温度补偿模型，流量计从未补偿时的温度与精度关系+0.05347%/℃降低为补偿后的-0.00625%/℃，补偿效果显著。
科氏質量流量傳感器(Coriolis Mass Flowmeter，簡稱CMF)是高精度直接敏感流體質量流量的多參數測量儀錶，精度高，重複性好。隨著質量流量計的廣汎應用，用戶逐漸開始關註外界因素產生的測量誤差，其中流體溫度對測量精度的影響是用戶關註的主要誤差之一。本文從科氏質量流量計的敏感機理齣髮，建立流量計的靈敏度模型，併依據材料的彈性模量隨溫度變化的模型，建立瞭流量計的靈敏度和溫度的補償模型。改造現有的靜態稱重法質量流量計標定裝置，對建模的流量計進行精度與流體溫度的實驗研究。理論與實驗結果錶明：科氏質量流量計隨著流體溫度的升高，將產生正嚮的測量誤差，誤差與溫度的關繫為二次麯線關繫，在特定的溫度範圍內，可以簡化為直線關繫；利用論文研究的溫度補償模型，流量計從未補償時的溫度與精度關繫+0.05347%/℃降低為補償後的-0.00625%/℃，補償效果顯著。
과씨질량류량전감기(Coriolis Mass Flowmeter，간칭CMF)시고정도직접민감류체질량류량적다삼수측량의표，정도고，중복성호。수착질량류량계적엄범응용，용호축점개시관주외계인소산생적측량오차，기중류체온도대측량정도적영향시용호관주적주요오차지일。본문종과씨질량류량계적민감궤리출발，건립류량계적령민도모형，병의거재료적탄성모량수온도변화적모형，건립료류량계적령민도화온도적보상모형。개조현유적정태칭중법질량류량계표정장치，대건모적류량계진행정도여류체온도적실험연구。이론여실험결과표명：과씨질량류량계수착류체온도적승고，장산생정향적측량오차，오차여온도적관계위이차곡선관계，재특정적온도범위내，가이간화위직선관계；이용논문연구적온도보상모형，류량계종미보상시적온도여정도관계+0.05347%/℃강저위보상후적-0.00625%/℃，보상효과현저。
Coriolis mass flowmeter (called CMF) is a high-precision fluid mass flow directly sensitive and multi-parameter measuring instruments, high accuracy and good reproducibility. With the wide application of mass flowmeter, the user gradually began to focus on the measurement error generated by external factors, which the fluid temperature influence on the measurement accuracy is a major concern of user error. From sensing mechanism Coriolis mass flowmeter, establishes flowmeter sensitivity model, and based on the elastic modulus of the material changes with temperature model, the establishment of the flowmeter sensitivity and temperature compensation model. By retrofitting existing mass flowmeter static weighing method calibration device, the experimental study of the precision and fluid temperature is made for the modeling flowmeter. Theoretical and experimental results show that: Coriolis mass flowmeter as the fluid temperature rises, the relationship will have a positive measurement error, the error is 2 times the temperature curve relationship, within a specific temperature range, it can be reduced to a linear relationship ; the use of temperature compensation model thesis, the relationship between temperature and the accuracy of the meter uncompensated error +0.05347% / ℃ reduced to compensated error -0.00625% / ℃, the compensation effect is remarkable.
