摘要
针对传统粘度测量装置体积庞大,检测精度不高,不能满足液体粘度抽检时的快速高效要求的问题,以对称腔体、共用通道和T型管道等结构设计了一种液体粘度测量装置。并基于微流控技术的原理,推导得出待测液体液滴形成频率和其粘度的关系,在微流量泵流量速度为2.4 m L/h的条件下,分别对不同粘度的油和乙醇溶液进行了测试。实验结果表明,通过油滴形成频率可以测量未知液体的粘度值,且可靠性更高,粘度测量的平均相对误差为3.52%,满足实际使用中的粘度测量要求。
In view of the large volume and low precision of the traditional viscosity measuring device,it can not meet the requirements of rapid and efficient sampling of liquid viscosity. In this paper,a liquid viscosity measuring device based on the symmetrical cavity,common channel and T-shaped pipe is designed. And the relationship between the frequency of formation droplets and the viscosity is also studied based on microfluidics technology. The oil and ethanol solutions with different viscosity values are tested at a flow rate of2. 4 m L/h. The experimental results show that the viscosity of unknown liquid can be measured by the droplet formation frequency,and the system is more reliable. The average relative error is only 3. 52%,which can satisfy the practical viscosity measurement requirement.
作者
杜林
周嘉
Du Lin;Zhou Jia(State Key Laboratory of ASIC and Systems,Fudan University,Shanghai 200433,Chin)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2018年第5期188-194,共7页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(61573236)项目资助
关键词
微流控
泊肃叶定律
粘度测量
频率检测
microfluidics
Poiseuille law
viscosity measurement
frequency test
