The system and the method of using two three axial accelerometers for the free fall descent detection which accompanies spin

摘要

It spins the system (10) and method, the occasion where the object falls, or it detects the free fall descent which it is related to the object which tumbling is done. While two three axial accelerometers (14 and 16) spinning, if so is not with centrifugal force and the centripetal power which are added on the object which falls, the algorithm which detects the free fall descent of the object which is not detected by the former free fall descent detection system, spins (28) to input is offered. Be able to use the system, in order to detect the free fall descent of the portable device which possesses onboard memory or hard disk drive, time in order to stop the read/write head at one time is allowed in the device, the possibility of losing the data which has the fact that it is damaged by impact is reduced. The notebook-sized personal computer, PDA, the MP3 player, portable device such as digital camera and portable telephone it can apply and furthermore to the automobile this free fall descent detection system.