A method of detecting improper routing of a seat belt having a lap belt portion and a shoulder belt portion by an occupant of a vehicle includes detecting a movement of the seat belt indicating that the shoulder belt portion was placed behind a back of the occupant, and providing a warning indicting improper routing of the shoulder belt portion of the seat belt if the movement of the seat belt indicates that the shoulder belt portion was placed behind the back of the occupant.

A system to locate seat controls and belt buckles includes a vehicle having at least one seat. A seat belt system is provided with the at least one seat having a seat belt, a belt latch and a seat belt buckle. A haptic device is provided with the seat belt system, the haptic device generating a haptic signal.

A system includes a first webbing payout sensor configured to detect a first webbing payout of a seatbelt associated with a vehicle seat, the first webbing payout being a length of webbing extended from a retractor of the seatbelt, an occupant detection module configured to identify a state of the vehicle seat, the occupant detection module identifying an occupied state when an occupant is seated on the vehicle seat and an unoccupied state when the vehicle seat is free from an occupant, and a seatbelt wear condition module in communication with the first webbing payout sensor and the occupant detection module and configured to identify whether a seatbelt buckle extender is used in conjunction with the seatbelt based on the first webbing payout and the state of the vehicle seat identified by the occupant detection module.

A seat belt system (10) has a control unit (14) and a seat belt (16) which includes a webbing (18) and a belt retractor (20). The belt retractor (20) comprises a belt reel (28) for the webbing (18), a rotation angle sensor (30) with a sensor unit and a rotatable measuring element, and a gear unit coupling the belt reel (28) to the measuring element. The belt reel (28) has a fully extended position and a ghost position. Furthermore, the gear unit is designed so that the gear unit reduces the rotation of the belt reel (28), when the belt reel (28) is adjusted from the ghost position to the fully extended position, to a maximum of 1.0 revolutions of the measuring element. In addition, a method for determining the extension length of a webbing (18) of a seat belt system (10) wound on a rotatable belt reel (28) is provided.

A restraint verification platform may obtain video data video data of a passenger in a passenger seat. The restraint verification platform may analyze the video data using one or more machine learning models trained to detect passengers in passenger seats and passenger restraints of the passenger seats. The restraint verification platform may detect, using the one or more machine learning models and based on analyzing the video data, the passenger in the passenger seat and a passenger restraint of the passenger seat. The restraint verification platform may determine, based on analyzing the video data, that the passenger restraint is not properly securing the passenger. The restraint verification platform may perform an action based on determining that the passenger restraint is not properly securing the passenger.

A method of detecting improper routing of a seat belt having a lap belt portion and a shoulder belt portion by an occupant of a vehicle includes detecting a movement of the seat belt indicating that the shoulder belt portion was placed behind a back of the occupant, and providing a warning indicting improper routing of the shoulder belt portion of the seat belt if the movement of the seat belt indicates that the shoulder belt portion was placed behind the back of the occupant.

A seatbelt sensor controller system and method is provided. The seatbelt sensor controller system includes a seatbelt component and a seatbelt sensor module. The seatbelt sensor module includes: a processor designed to execute instructions stored in a memory module, an electromechanical device for determining a length of a seatbelt strap, and a notification module for notifying an operator of the material handling vehicle if the length of the seatbelt strap is less than a setpoint threshold value.

A belt retractor having a device for sensing the extension length of a safety belt, wherein: the belt retractor has a frame which can be fastened fixedly to the vehicle and a belt shaft mounted rotatably in the frame, on which belt shaft the safety belt can be wound, and the device for sensing the extension length has a first rotary encoder and a first rotational angle sensor, and, a reduction gear unit is provided which reduces the rotation of the belt shaft to a rotation of the first rotary encoder with a lower speed, and a second rotary encoder and a second rotational angle sensor are provided, and the second rotary encoder is driven by the belt shaft at a speed greater than the speed of the first rotary encoder.

Safety apparatus for indicating the usage state of a seat belt. The seat belt has a strap spooled from a retractor and being lockable to a buckle by a tongue. The apparatus has an indicator unit for mounting to an upper part of a seat. A lock indicator is provided on the indicator unit and, in use, is operably connected to the buckle for indicating a state when the tongue has been locked into the buckle. A strap indicator is provided for indicating a state when a spooled length of the strap exceeds a threshold corresponding to a predetermined minimum length of strap needed to secure a body with the seat belt. The lock indicator and the strap indicator are detectable by a camera.

Systems, methods, and other embodiments described herein relate to ensuring proper usage of passenger restraint devices. In one embodiment, a method includes controlling the millimeter-wave (mm-wave) radar sensor to transmit mm-wave radar waves toward a seat of a vehicle. The method also includes 1) detecting, from reflected mm-wave radar waves, an arrangement of a concealed metallic marker within a passenger restraint device of the seat relative to a passenger in the seat and 2) estimating an expected arrangement of the passenger restraint device relative to the passenger. A notification is generated responsive to the reflected mm-wave radar waves indicating that the arrangement of the passenger restraint device is different than the expected arrangement of the passenger restraint device.