基于透射式光电传感器的气泡检测装置设计  

Design of bubble detection device based on transmission-type photoelectric sensor

作　　者：刘昕宇 侯文宇 王文佳 陈超志 张雅各 LIU Xinyu;HOU Wenyu;WANG Wenjia;CHEN Chaozhi;ZHANG Yage(Central Laboratory for Biomedical Engineering,Medical School,Shenzhen University,Shenzhen 518055,China)

机构地区：[1]深圳大学医学部生物医学工程教学实验中心,广东深圳518055

出　　处：《传感器与微系统》2023年第12期91-94,共4页Transducer and Microsystem Technologies

基　　金：2023年广东省“新医科”教指委教学改革项目;2023年度深圳大学教学改革研究项目(JG2023035)。

摘　　要：针对体外诊断仪器液路系统中气泡影响仪器性能的问题,基于透射式光电传感器,设计了适用于1.5 cm×2.5 cm规格的氟乙烯—乙烯共聚物(FEP)管和聚四氟乙烯(PTFE)管的气泡检测装置。依据朗伯—比尔定律,利用传感器输出的电压变化判定气泡是否存在。通过外围硬件电路和控制程序的开发,该装置实现了稳定的灯光报警功能和人机交互界面。实验结果表明:该装置能够检测流速500μL/s,等效体积约为5μL的气泡,实现了较高的检测精度。Aiming at the problem that bubbles in liquid path systems of in vitro diagnostic instruments may affect the performance of the instrument,a bubble detection device for 1.5 cm×2.5 cm FEP and PTFE pipe is designed based on transmission-type photoelectric sensor.According to Lambert-Beer Law,utilizing voltage variation of sensor output to determine the existence of bubbles.Through the development of peripheral hardware circuit and control program,the device realizes a stable lighting alarm function and human-computer interface.Experimental results show that the device can detect bubbles with an equivalent volume of 5μL at a flow rate of 500μL/s,and can achieve high detecting precision.

关 键 词：液路系统 光电传感器 气泡检测 朗伯—比尔定律 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]