| Motor vehicle has become the primary pollution source in many big cities, and how to solve the environmental pollution and road congestion caused by the fast development of motor vehicle is one of the important tasks faced by our nation. BRT (Bus Rapid Transit) plays an important role in solving the environment pollution and traffic congestion. BRT has been promoted rapidly because of its large capacity, reserved BRT lanes, ticketing outside and traffic priority. Practices show that the BRT system is an effective way to solve the traffic problem in big cities. However, the power supply problem of public facilities has been criticized widely, and searching a safe and stable power supply for public facilities has become one of the main research goals of the experts and scholars. The energy collected in BRT lanes can be used for powering electricity facilities around the BRT station, which provides a new type of green energy-saving power technology. The research work in this paper focuses on the key technologies of energy harvesting based on BRT lanes, and we proposed a novel chessboard road energy harvesting system based on BRT lanes. The main research works in this paper present as follows:First of all, a new kind of chessboard road energy harvesting system based on BRT lanes is put forward.The road energy harvesting system presented in this paper adopts the modularized design, including four modules:the chessboard energy-input module, the transmission module, the micro generator module and storage module. And all the modules are encapsulated in a box for achieving rapid installation and replacement. There is no part of the system protruded from the ground, which solves driver’s driving psychological interference problem caused by the traditional road energy harvesting device. The two-way rotation of the shaft can be converted to one-way rotation of the smaller bevel gear by the alternative engagement of the three bevel gears in order to increase the efficiency of the energy harvesting.Secondly, the chessboard type road energy harvesting system modeling and simulation.A dynamic model of micro-generator is built for analyzing the micro-generation module, and then introduces the concepts of effect and flow, which can be used to solve the multi-domain problems with the uniform format. The power the road energy harvester collected through the theoretical calculation can be calculated. The road energy harvesting system is verified with Solidworks Motion and Multisim software, and the results show that the peak energy harvesting efficiency of the system can reach 62.38%. Mechanism analysis results show that the structure is reasonable.The last part is the manufacture and optimization of the road energy harvester.Some improvement measures are put forward during the manufacture, which are shown as follows:(1) the way the big bevel gears processed; (2) the way pawl fixed and the method the pawl coordinated with the metal plate; (3) the generator support scheme. These improvement measures are conducted to reduce the complexity of structures and difficulty of processing technology, improving the stability operation of the device, simplifying the assembly process and save the processing costs.In addition, this paper also introduces a novel road energy harvester based on the electromagnetic induction principle, which is developed by Southwest Jiaotong University and Shenzhen green lane co., LTD. The difference between this harvester and the chessboard harvester is that this energy harvesting device must be attached to the speed bump. After the simulation, a road test is conducted to verify the performance. The road test results show that the peak voltage of this road energy harvesting device can achieve 194.0 V. Finally, the shape of the energy input mechanism is improved in order to reduce the cost and difficulty of engineering. |
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