Research On Hydrogen Leakage And Intelligent Monitoring System For Hydrogen Energy Vehicles

Nowadays,the development of China’s hydrogen energy vehicle industry has gradually entered a critical period,and the transition from technological research to demonstration and industrialization is underway.Replacing fossil energy with new energy is the best way to deal with environmental degradation and the exhaustion of fossil energy.As a clean and efficient renewable energy,hydrogen energy has the advantages of simple acquisition,high combustion calorific value,zero pollution,largescale storage,and rapid replenishment.As an important development direction of my country’s new energy vehicles in the future,hydrogen energy vehicles have many advantages such as short energy replenishment time and long cruising range.However,when hydrogen is mixed with air or oxygen,it will form a flammable and explosive mixture with a very wide mixing ratio and a very low lower limit.Therefore,hydrogen is a highly dangerous product.Therefore,the use scenarios of hydrogen energy vehicles need to be ensured.safe.Based on the above facts,research on hydrogen leakage of hydrogen energy vehicles and intelligent monitoring systems is an important part of promoting the development of the hydrogen energy industry for vehicles.Aiming at the establishment of a multi-dimensional hydrogen energy vehicle hydrogen leakage theory and designing a heterogeneous sensor-based hydrogen leakage monitoring system for the Internet of Things,this paper carries out a numerical simulation study on the hydrogen leakage of hydrogen energy vehicles,and obtains the flow field distribution after the leakage.The difference in time and space changes,combined with many heterogeneous sensors,realizes the safety monitoring of hydrogen leakage of hydrogen energy vehicles through the Internet of Things technology.The main contents include:（1）Introduced in detail the development trend of the domestic hydrogen energy industry for vehicles,pointed out the current bottleneck in the development of hydrogen energy vehicles;conducted detailed investigations on hydrogen safety accidents and formed important data support;conducted research on hydrogen leakage mechanism and Io T Summary.（2）The fluent software package in ANSYS was used to establish a mathematical model of the automobile interior cabin,and the influence laws of characteristic parameters such as leakage location,ambient wind speed,temperature,and obstacles on hydrogen leakage and diffusion under typical scenarios and different working conditions were obtained.Through the analysis of the cloud diagram of the hydrogen velocity and concentration distribution obtained by the simulation,it provides a theoretical basis for the layout of the sensors of the subsequent monitoring system,and can initially determine the location of the leakage source.（3）Constructed a heterogeneous wireless sensor network,demonstrated the sensor selection of the heterogeneous sensor system,and solved the problems of low accuracy of the single-sensor monitoring system and the unguaranteed safety of the single-sensor monitoring system.（4）The Internet of Things technology is applied to the field of hydrogen leakage monitoring of energy vehicles,and the system is designed at four levels: perception layer,network layer,platform layer and application layer.Use Zig Bee wireless transmission technology to connect various sensors to obtain data,feedback real-time information to the user through the monitoring interface,and make an alarm when the relevant monitoring data exceeds the threshold.The research results show that the work of this subject provides an important theoretical basis for the arrangement of hydrogen energy vehicle sensors,and the system architecture design of the intelligent monitoring system is reasonable.Summarized the research results of this article,and looked forward to the future direction of work.