面向酒驾检测的可调谐半导体激光器及反射式TDLAS技术研究

According to the Ministry of Transportation statistics, in recent years due to drunk driving accidents caused by an annual average of 25 million, resulting in about 50,000 deaths, nearly 1.3 billion yuan in direct economic losses. The detection of drunk driving is the main breathing alcohol detector to carry out spot checks on passing vehicles to spot check vehicles for less than 5% of the gross vehicle belonging to these drivers who were tested as the proportion of drunk driving drivers less than 1%, so this "needle in a haystack" detection coverage of small, inefficient. In this case, the project proposes a new research of "Tunable semiconductor laser and reflective TDLAS technology for the drunk driving detection" which aimed at to achieve a new and efficient laser and with the reflective tunable semiconductor diode laser absorption spectroscopy technology could make a wide coverage, high-efficiency checking of drunk driving in the future.

据交通部统计, 我国近年来因酒后驾车所导致的交通事故平均每年有25万余起，造成约5万人死亡，直接经济损失近13亿元。传统的检测酒驾方法主要是采用"呼吸式酒精检测仪"来对过往车辆进行抽查，被抽查的车辆比例不到总车量的5%，在这些被抽查的司机当中属于酒驾司机的比例不到1%，所以这种"大海捞针"的检测方式覆盖面小、效率低下。针对此情况，本项目提出一种面向酒驾检测的"面向酒驾检测的可调谐半导体激光器及反射式TDLAS技术研究"，旨在着重通过研制一种新型的电流注入式"905nm调谐式垂直腔面发射半导体激光器"，并采用反射式"可调谐半导体二极管激光吸收光谱技术（TDLAS）"，来实现一种新型高效的非接触式激光酒驾检测方式，以期将来对酒驾实现宽覆盖面、高效率的检测。

酒驾入刑已经有5年时间，交警部门一直对酒驾治理投入大量物资与警力，保持着严管重罚的高压态势。传统的检测酒驾方法主要是采用“呼吸式酒精检测仪”来对过往车辆进行抽查，被抽查的车辆比例不到总车量的5%，在这些被抽查的司机当中属于酒驾司机的比例不到1%，所以这种“大海捞针”的检测方式覆盖面小、效率低下。针对此情况，本项目提出一种 “面向酒驾检测的可调谐半导体激光器及反射式TDLAS技术研究”，通过研究气体的激光检测原理，研制酒精气体检测激光光源，组建一款非接触式的酒精气体检测系统，以期将来对酒驾实现宽覆盖面、高效率的辅助检测。本项目通过三年的研究，已完成项目计划内容，开发出一种专门用于酒精气体检测的 “电流注入调谐式905nm半导体激光器” 一体化光源模块。采用“可调谐半导体二极管激光吸收光谱技术（TDLAS）” ，研究并试制了一套对乙醇气体进行非接触式探测的检测系统，测试结果验证了本项目所设计的TDLAS型酒精气体检测技术应用于酒精气体浓度的非接触式检测的可行性。