The Design of the Wheel Speeds Measurement Circuit Based on C8051F045 MCU

This paper introduced the wheel speeds measurement circuit based on C8051F045 MCU.The circuit adopts magnetic susceptibility sensor SDI-H to realize multiple signal collection,then the two pulse square wave signal will be a signal which processes by the signal processing circuit back into the MCU to counts.Based on the pulse counts we will get the wheel speed information.Finally,through the CAN bus communication the wheel speed information will be displayed in PC.The application shows that this design possess nicer stability of speeds measurement.