TY - GEN
T1 - A MEMS flow sensor and its application in adaptive liquid dispensing
AU - Yaxin, Liu
AU - Liguo, Chen
AU - Lining, Sun
PY - 2009
Y1 - 2009
N2 - A high speed MEMS flow sensor was proposed to enhance the reliability and accuracy of liquid dispensing system. Benefiting from the feedback of sensor information, the system can self-adjust the open time of the solenoid vale to accurately dispensing desired reagent volume without pre-calibration. This paper focuses on the design, fabrication and application of this flow sensor. Firstly, the design, fabrication and characteristics of the MEMS flow sensor based on the measurement of the pressure difference across a flow channel are presented. Secondly, the liquid dispensing system in which the flow sensor is integrated will be introduced. A novel closed-loop control strategy is proposed to calculate valve open-time for each dispensing cycle. Finally, experiments results are presented with different dispensing volumes, coefficient of variance (CV) has been shown to be below 3% at 1ul and approach 4% at 100 nl. It indicates that integration of the MEMS flow sensor and using of a compound intelligent control strategy make the system immune to liquid viscosity, pressure fluctuation and some other disturbances.
AB - A high speed MEMS flow sensor was proposed to enhance the reliability and accuracy of liquid dispensing system. Benefiting from the feedback of sensor information, the system can self-adjust the open time of the solenoid vale to accurately dispensing desired reagent volume without pre-calibration. This paper focuses on the design, fabrication and application of this flow sensor. Firstly, the design, fabrication and characteristics of the MEMS flow sensor based on the measurement of the pressure difference across a flow channel are presented. Secondly, the liquid dispensing system in which the flow sensor is integrated will be introduced. A novel closed-loop control strategy is proposed to calculate valve open-time for each dispensing cycle. Finally, experiments results are presented with different dispensing volumes, coefficient of variance (CV) has been shown to be below 3% at 1ul and approach 4% at 100 nl. It indicates that integration of the MEMS flow sensor and using of a compound intelligent control strategy make the system immune to liquid viscosity, pressure fluctuation and some other disturbances.
KW - Flow sensor
KW - Liquid dispensingt
KW - MEMS
UR - https://www.scopus.com/pages/publications/70449336908
U2 - 10.1109/ICMTMA.2009.329
DO - 10.1109/ICMTMA.2009.329
M3 - 会议稿件
AN - SCOPUS:70449336908
SN - 9780769535838
T3 - 2009 International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2009
SP - 3
EP - 7
BT - 2009 International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2009
T2 - 2009 International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2009
Y2 - 11 April 2009 through 12 April 2009
ER -