Research on refrigerator electronic nose monitoring system based on Raspberry Pi

Combined with the existing electronic nose technology, this topic proposes a mathematical model for the gas movement at the temperature of the freezer, and draws up a reasonable gas concentration range according to the standard of food deterioration, and uses the temperature and humidity sensors to monitor the environment inside the freezer. Check whether the freezer is in a suitable fresh-keeping environment. Real-time collection of gases such as ammonia, hydrogen sulfide, ethane mercaptan and other substances emitted by different types of food due to deterioration, and transmit the data to the upper computer, and combine the software of the upper computer to monitor and judge the condition of the food.