We plan to construct a database for gathering sensing data from vehicles.

$$ Each vehicle has VIN, license$\_$plate, and color. Each vehicle may have a model.

$$ A model has id and name.

$$ Each vehicle creates sensor dataset.

$$ Each sensor data includs time, GPS$,$ rpm$,$ and acceleratoin. We assume that a

sensor acquires data at one$-$second intervals.

$$ A customer has id and name.

$$ A customer can own multiple vehicles and a vehicle can be owned by multiple

customers.