面向微量试剂分配的压电叠堆泵

微量、快速、精确的试剂分配是生物、制药等领域不可或缺的技术手段.研制了以压电叠堆为驱动器实现高精度、微量化和自动化试剂分配的压电叠堆泵样机.研究了压电叠堆泵的结构、工作原理及加工装配过程.实验研究了不同的输入信号对压电叠堆泵性能的影响和压电叠堆泵的输出流量及压力与输入电压、频率的关系,并将该样机与喷嘴装配在一起组装成试剂泵进行试剂分配实验,研究了试剂泵输出流量及微滴体积与输入电压、频率的关系.测得该压电叠堆泵输出流量的重复精度可达到77.42 μL,喷嘴直径为0.5 mm时试剂泵进行试剂分配的液滴体积为16.09 μL,重复精度为0.29 μL,实现了微量、快速、精确的试剂分配.

Piezoelectric-Stack Pump for Micro-Reagents Dispense

Microscale,fast,precise micro-reagents dispense is the key technology indispensable in life science,chemical experiments and other fields.A piezoelectric-stack pump prototype was developed to implement high-precision,microscale and automated reagents dispense.The structure,working process and assembly process of the piezoelectric-stack pump were studied.Experiments were conducted to investigate the impact of the input signal on the performance of the piezoelectric-stack pump and the relationship between the output flow rate and pressure,and the input power and frequency.Reagent pump was fabricated by installing nozzle on the prototype,and then the relationship between the output characteristics of the reagent pump and the volume of the micro-droplet was studied.The repeating precision of the output flow is 77.42 μL.The volume and repeating precision for reagents dispense are 16.09 μL and 0.29 μL respectively when the diameter of the nozzle is 0.5 mm.