Proposal of system for detection of thing left behind

The 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.