Shape Memory Alloy(SMA) Actuated Microfluidic Colour-Changing System

基于形状记忆合金(SMA)驱动的微流控变色系统

¹ School of Mechatronics Engineering, North China Institute of Science and Technology, Beijing 101601, China
² School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China

Received: 15 May 2019

Abstract

In order to improve the performances of microfluidic actuators, a microfluidic actuating way based on the shape memory alloy(SMA) is presented, which is applied for the liquids circulation of a microfluidic colour-changing system. A SMA spring is used as the main actuating part, a microfluidic actuating device based on the SMA spring is designed and fabricated. The models for the SMA spring and the whole SMA actuated microfluidic system are established, the experimental platform is built. The temperature properties, output displacement performances and pressure responses of the present system are simulated and tested under different experimental conditions. Comparing with traditional microfluidic actuating systems, the SMA actuated microfluidic colour-changing system is driven by using DC power, small in size, convenient in operation, and has fast response speed and high reliability.

摘要

为了提高微流体驱动系统的性能，提出了一种基于形状记忆合金（SMA）的微流体驱动方式，用于微流控变色系统内液体循环的双程驱动。以SMA弹簧为主要驱动元件，设计并制作了基于SMA的微流体驱动装置，建立了SMA驱动元件和SMA驱动微流控变色系统的数学模型，搭建了SMA驱动微流控变色试验平台，在不同参数条件下，对驱动系统的温度响应特性、位移输出特性和液体压强特性进行了仿真分析和试验研究。结果表明，与传统微流体驱动方式相比，SMA驱动的微流体变色系统采用直流电源驱动、体积小、操作便捷，具有较快的响应速度和较高的可靠性。