Intelligent E-Bike Driven Rotated Shaft Sensor Design And Optimize

Intelligent Electrical Bike can monitor driver's driven force in real time and dynamically,and then adjust motor's output power timely,it brings driver relax driving experience when on climbing upslope or against wind status.Therefore,E-bike is more and more welcomed by people.Intelligent E-bikce is used fuzzy logic control,the core component is hall effect sensor,it detects E-bike speed,rotation direction and rotation angle with none contact method.Current existing E-bike Drivenshaft sensor have such this defect with collecting fewer analog signal quantity(Each cycle only generates 18 or 24 pieces pulse signal),tow response speed and tow sensitivity.So it is necessary for us to study hall effect sensor with high design precision,more quick response speed and high sensitivity.1.Solution designThis thesis brings a hall effect sensor design solution with higher precision designed a driven rotation Shaft Sensor.It will generate 36pieces pulse signal for each cycle shaft rotation,but traditional driven rotation shaft sensor only can generate at most 24pcs pulse signal for each cycle shaft rotation.This thesis put more points on sensor magnet?magnet holder?housing?shaft?circuit layout design and optimization,base on cross experiences and find out the root cause of magnet crack issue during assembly.It analyzes low pressure injection sealing process with all defects for sensor housing and brings a solution which suitable for mass-production with wore than 98%yield.2.Simulation and optimization designThis chapter do optimization design for magnet and magnet holder,analyze magnet crack root cause when assembling magnet,do optimization design for magnet crack issue,do optimization design for sensor housing,do study for fow pressure injection defects,do improvement for low pressure injection process,do optimization design for sensor air gap parameter.3.ExperimentstudyThis chapter do experiment study for magnet holder with EPDM material and PA66+GF30 material,do experiment study for sensor housing,and do experiment study for low pressure injection process with sealing sensor.This sensor design solution brings a dramatic improvement,it provide the best support for driver.This system has high design precision,it will generate 36pieces pulse signals for each driven shaft rotation.It gets accurate control because of limited short time when driven system start or stop.It reflects more sensitive for personal driving character.So this solution is worth referring and popularizing.