摘要：AbstractThe number of elderly persons is rapidly increasing. As people grow old, they often become forgetful. For their help, we are proposing a new system for preventing things from being left behind. By the use of acceleration sensors, the state of a thing left behind and the owner can be distinguished. As a result, it can correctly detect if a thing has been left behind, and also can be used in a vehicle. When a thing has been left behind in a vehicle, both the thing left behind and the owner are alerted by a bell. When it occurs in a place other than a vehicle, only the owner is alerted.
关键词：Thing left behind;Acceleration sensor;Walking;Vehicle;Announce
