基于光纤束的多通道干式生化传感器设计

摘要

Objective To develop a multi-channel dry type biochemistry sensor with a compact structure and high measurement accuracy.Methods The principle of double beam compensation based on reference LED was applied to improve the measurement accuracy.The complex splitting system was replaced by MXN fiber bundle and free-form surface lens to make the instrument more compact and lightweight.Use of the adaptive amplification photoelectric detection improved the measurement accuracy while simplifying the process.Results and Conclusion It has been proved by experiments that this sensor has the advantages of high measurement accuracy, little interference and compact construction. This sensor may well meet the requirements of dry type biochemistry analysis.%目的：研制一种结构紧凑便携、检测结果准确可靠的多通道干式生化传感器。方法采用参比发光二极管（ LED）实现双光束补偿；光路上采用多模光纤构造的多进多出MXN光纤束和单一非球面耦合镜片设计，代替传统冗杂的分光系统；电路上采用放大倍率自适应的光电转换电路。结果与结论实验证明，使用该传感器测量得到的信号干扰小，各通道一致性好，测量准确可靠，且整体结构紧凑，操作维护简单，可很好满足干式生化分析的要求。