Patent ID: 8926614
Filing Date: 2015-01-06
Classification: A61B

Abstract:
1. A medical electric drill, comprising: a drilling head for drilling a bone; a microprocessor which is connected to the drilling head for calculating a displacement of the drilling head; a pressure sensor unit for detecting a pressure change of the drilling head and providing a pressure change signal to the microprocessor; a torque sensor unit for detecting a torque change of the drilling head and providing a torque change signal to the microprocessor; and a gravity sensor unit for detecting an acceleration variation of the drilling head and providing an acceleration voltage signal to the microprocessor; wherein the microprocessor determines a work period of drilling the bone according to the pressure change signal provided by the pressure sensor unit and the torque change signal provided by the torque sensor unit, and then the microprocessor calculates the displacement of the drilling head by using the acceleration voltage signal during the work period; wherein the work period is a duration between a start time and an end time of the drilling head drilling the bone.