System and method for improving safety of occupant by vehicle seat belt

A system for improving safety of an occupant by a vehicle seat belt, comprising:

• an in-vehicle observation system configured to acquire in-vehicle occupant posture data and/or in-vehicle occupant body shape data and/or in-vehicle seat posture data and/or in-vehicle occupant mental state data;
• an active seat belt system, which comprises an active retractor and an active lift buckle;
• and
• an integrated safety domain control unit configured to receive the data acquired by the in-vehicle observation system and monitor states of the active retractor and the active lift buckle, and to formulate a vehicle seat belt protection strategy based on at least one piece of the received data, a slack state of the active retractor, and a positional state of the active lift buckle,
• wherein the vehicle seat belt protection strategy comprises:
• selectively tightening or loosening the active retractor based on the in-vehicle occupant posture data and/or the in-vehicle occupant body shape data and/or the in-vehicle seat posture data and the slack state and the positional state;
• and/or
• selectively lifting or lowering the active lift buckle based on the in-vehicle occupant posture data and/or the in-vehicle occupant body shape data and/or the in-vehicle seat posture data and the slack state and the positional state.