Vehicle Seat Occupancy Detection via Acceleration Signal Analysis

The patent applies mechanical vibration analysis by using an acceleration sensor to detect and evaluate the vibration characteristics of the seat upper part. The system analyzes the frequency and amplitude of vibrations to distinguish between a driver and dead mass, as living drivers generate characteristic body movements and vibrations that differ from inanimate objects. This resolves the contradiction by maintaining relatively simple device architecture while achieving high measurement precision through sophisticated vibration pattern recognition.

The patent implements feedback through continuous monitoring of vibration characteristics and dynamic adjustment of occupancy detection decisions. The evaluation unit continuously analyzes acceleration signals and compares them against learned patterns to determine whether the seat is occupied by a driver or dead mass. This feedback mechanism allows the system to reliably distinguish between genuine occupancy and dead mass placement, ensuring actuators are only kept active when a driver is truly present, thereby eliminating the safety risk while maintaining actuator reliability.

The patent replaces complex mechanical occupancy detection systems with an electronic acceleration sensor-based vibration analysis system. Instead of using multiple sensors or complex mechanical switches, the invention uses a single acceleration sensor to capture vibration signals, which are then processed electronically by an evaluation unit. This substitution of mechanical systems with electronic sensing and signal processing achieves high measurement precision while keeping the overall device complexity manageable through the use of modern electronic components and algorithms.