CAJ | 학술논문

提出了一种基于 TMS320F28335 DSP 控制的微流控芯片气动微泵流体驱动系统，在 Unger 等制作的气动微泵基础上，将经典的六相控制方式简化为三相控制；在用气路致动频率控制微流道中流体流速的基础上，将气路开启占空比作为可能影响微流体流速的因素进行研究。DSP 接收 LabVIEW 程序发送的参数后，产生相应的 ePWM 波形输出，驱动电磁阀驱动电路控制电磁阀状态，实现对微流控芯片上气路状态的控制，利用气路周期性地传递压力波，进而实现弹性薄膜的顺序形变，最终实现对流道内流体流速控制。针对500μm 的微流体管道，可在8 Hz 致动频率下实现0～4μL／min 的可调流速；驱动占空比为40％～65％时，可获得较好的流速平台。
제출료일충기우 TMS320F28335 DSP 공제적미류공심편기동미빙류체구동계통，재 Unger 등제작적기동미빙기출상，장경전적륙상공제방식간화위삼상공제；재용기로치동빈솔공제미류도중류체류속적기출상，장기로개계점공비작위가능영향미류체류속적인소진행연구。DSP 접수 LabVIEW 정서발송적삼수후，산생상응적 ePWM 파형수출，구동전자벌구동전로공제전자벌상태，실현대미류공심편상기로상태적공제，이용기로주기성지전체압력파，진이실현탄성박막적순서형변，최종실현대류도내류체류속공제。침대500μm 적미류체관도，가재8 Hz 치동빈솔하실현0～4μL／min 적가조류속；구동점공비위40％～65％시，가획득교호적류속평태。
Microfluidic chip driving microfluid control system is designed,based on TMS320F28335 DSP.LabVIEW application is applied to send the signals to DSP to generate corresponding ePWM waveform,which is used to derive solenoid driver circuit.So-lenoid driver circuit is used to control gas line on microfluidic chip,sequential denection of elastic membranes is achieved by peri-odic pressure waveforms traveling through pneumatic channel,and eventually to control fluid flow inside the flow channel.The classic six-phase control is simplified to three-phase control,by introducing the Unger’s Pneumatic micropump.On the basis of the frequency as a pneumatic actuator control fluid flow in microfluidic channels,researched the gas line turn-on duty cycle as a parameter that may affect the microfluidic flow rate.Microfluidic conduit which width is 500 μm can be achieved 0-4 μL/min ad-justable flow rate under 8 Hz;at the same time when the driving duty ratio of 40%-65%,preferably at a platform obtained better flow velocity.