Patent ID: 9610862
Date: 2017-04-04
CPC Classifications: B60N

Claim:
1. An occupant-support sensing system comprising an occupant support including a seat bottom adapted to couple to a floor to move back and forth along a longitudinal axis relative to the floor and a seat back coupled to the seat bottom and arranged to extend upwardly away from the seat bottom to pivot about an axis relative to the seat bottom, a support-orientation unit including a floor-orientation accelerometer coupled to the floor in a fixed position relative to the floor and configured to sense a gravity-based incline angle of the floor and a seat-back accelerometer coupled to the seat back to move therewith relative to the seat bottom and the floor and configured to sense a gravity-based recline angle of the seat back, and a support-motion controller coupled to the occupant support and the support-orientation unit and configured to calculate a floor-incline angle using data received from the floor-orientation accelerometer, an actual seat-back angle using data received from the seat-back accelerometer, and an adjusted seat-back angle using the floor-incline angle and the actual seat-back angle, wherein the support-motion controller includes a position calculator configured to calculate the adjusted seat-back angle using the floor-incline angle and the actual seat-back angle and wherein the position calculator calculates the adjusted seat-back angle by subtracting the floor-incline angle from the actual seat-back angle.