Nowadays, drunk driving, fatigue driving and high-speed driving are the three major elements that lead to the high incidence of traffic accidents in our country. Among them, the road accidents caused by drunk driving accounted for the highest proportion, and drunk driving behavior showed an increasing trend with the continuous growth of the number of private cars, which seriously affected the stability of our society. At present, the road drunk driving test in my country and almost all countries in the world still relies on the traffic police to set up a point, and use an alcohol detector to test the driver's alcohol breath to determine whether the driver is drunk driving.

With the rapid development of the automobile industry, car ownership is gradually increasing, car traffic safety has become the focus of today's society, and drunk driving as one of the important factors causing the current road traffic accidents. Therefore, in order to reduce the loss of drunk driving and personal safety accidents, the intelligent monitoring system to prevent drunk driving has become the focus of research from all walks of life. With the development of Internet of Things technology and sensor technology, countries around the world continue to develop research and development work on vehicle-mounted anti-drunk driving systems.

In order to improve the efficiency and initiative of drunk driving management, safety technology equipment such as alcohol locks and car alcohol detectors have begun to be promoted and applied in various countries. The alcohol detector needs an efficient and reliable alcohol gas sensor, which can measure the change of alcohol content in human breath and ensure driving safety.