基于STM32的便携式直链淀粉测定仪设计

针对目前测定直链淀粉含量的仪器存在价格昂贵、前处理繁琐且体积庞大等弊端，设计开发了一种基于光电比色原理的专用型直链淀粉测定仪。该仪器以STM32嵌入式系统芯片作为主控制器，创新性地采用液体透射式光纤探头替代比色皿取样，光电检测电路采用高性能单波长激光光源与对数放大器，提高了系统的检测精度和准确度。该仪器具有小型化、成本低、检测简单、准确、可靠便携等优点。实验结果表明：该仪器测定样品直链淀粉含量的相对误差为1.34%～1.73%，完全满足日常测量要求，适于在流动监测或现场分析推广应用。

Design of portable amylose determinator based on STM32

Aiming at disadvantages of expensive price,tedious pre-treatment and bulkiness that amylose content determinator has,design and develop a tailored version amylose daterminator besed on the theory of photoelectric colorimetry. STM32F103 is used as the core controller,liquid transmission optical fiber probe is used innovatively instead of the cuvette,high-performance single-wavelength laser lamp-house and log amplifier are adopted to improve the precision and accuracy of the detection system. The apparatus has miniaturization,low cost,simple and accurate detection,reliable and portable and other advantages,Experimental result shows that the relative error range is 1. 34 %~1. 73 %,fully meet measurement demand,so it is well suitable for application in mobile surveillance or on-site analysis.