Design And Simulation Research Of Speed Bump Energy Regenerative System For Expressway Toll Station

As an essential part of road traffic,the expressway carries huge passenger and freight volumes.There are toll stations at the entrance and exit of expressways.With the growth of the number of motor vehicles and the development of the cities,the traffic flow at the toll stations of expressways is increasing.Speed bump is often set in front of the toll station.The energy of vehicles passing through the speed bump is dissipated in the form of heat.This part of energy can be harvested to supply power for electronic equipment around expressway toll stations.Therefore,this paper proposes a speed bump energy regenerative system for the expressway toll station,which can decelerate the vehicle and harvest energy at the same time,to supply power for electronic components of expressway toll stations,which is of great significance for energy conservation and environmental protection.The main research work of this paper is as follows:First of all,the overall scheme of the speed bump energy regenerative system for the expressway toll station is proposed.In this paper,based on the research status at home and abroad,a feasible scheme of speed bump energy regenerative system is proposed,and the structural layout and working principle of the scheme are described.The modular design idea is used to complete the design of speed bump module,transmission module,generator module and energy storage module.In this scheme,the spatial double V-shaped mechanism is used as the transmission module to convert the bidirectional linear motion of the speed bump into the unidirectional rotation of the brushless DC generator.The spatial double V-shaped mechanism is designed to optimize the travel of the speed bump,which has little impact on the passing vehicles.Secondly,modeling and simulation analysis of the speed bump energy regenerative system are carried out.The system simulation models under different vehicle speeds and square wave excitations are established by using MATLAB.The simulation results show that with the increase of vehicle speed or input force,the output power of the mechanical part of the speed bump energy regenerative system increases gradually,and the average mechanical efficiency can reach62.32%.At the speed of 10 km/h,the maximum input power and output power under 1100 N input force are 144.680 W and 90.167 W,respectively.Finally,the prototype of the speed bump energy regenerative system is fabricated and tested.In this paper,based on the design scheme,a prototype of the speed bump energy regenerative system is made,and the bench test is carried out on the MTS test platform.The test results show that the output voltage of the regenerative system can reach 12.64 V under the square wave input force of 500 N and 0.1 Hz.The estimated results show that if the system is built in all mainline expressway toll stations in China,the annual total power generation can reach 219.66 MWh.Through the prototype fabrication and test,the speed bump energy regenerative system initially realizes the expected function,which is to decelerate the vehicle and harvest the vehicle energy at the same time.