Aiming at problem that to measure velocity of crane by traditional way is not convenient

design a wireless acceleration sensor based on 3D analog acceleration sensing component

research on acquisition and calculation method of moving velocity of crane. Aiming at problem of inherent 0 gnbias level that three-dimension（ 3D） analog acceleration sensor has

which results in hardly to judge whether the crane run with acceleration

give a judging way and program in embedded wireless acceleration sensor to implement measurement and transmission of 3D acceleration and calculate the velocity by programming in upper PC. Real time datas of the cranes with load are given.