US 12,187,213 B2
Enhanced front impact detection utilizing pressure tube sensor
Maciej Rejer, Friedrichshafen (DE); Andreas Fleckner, Friedrichshafen (DE); Pawel Koziel, Friedrichshafen (DE); Charles A. Bartlett, Commerce Township, MI (US); and Harald Pfriender, Friedrichshafen (DE)
Assigned to ZF FRIEDRICHSHAFEN AG, Friedrichshafen (DE)
Appl. No. 17/795,578
Filed by ZF FRIEDRICHSHAFEN AG, Friedrichshafen (DE)
PCT Filed Mar. 19, 2020, PCT No. PCT/IB2020/052544
§ 371(c)(1), (2) Date Jul. 27, 2022,
PCT Pub. No. WO2021/186220, PCT Pub. Date Sep. 23, 2021.
Prior Publication US 2023/0140943 A1, May 11, 2023
Int. Cl. B60R 21/0136 (2006.01); B60R 21/205 (2011.01); G01L 13/00 (2006.01); G01L 19/00 (2006.01); B60R 21/01 (2006.01)
CPC B60R 21/0136 (2013.01) [B60R 21/205 (2013.01); G01L 13/00 (2013.01); G01L 19/0092 (2013.01); B60R 2021/01265 (2013.01); B60R 2021/01286 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for controlling an actuatable safety device for helping to protect a vehicle occupant, the method comprising:
sensing left-front and right-front pressure values via a pressure tube sensor;
executing pressure tube metrics that evaluate the left-front and right-front pressure values;
selecting switched crash thresholds in response to the pressure tube metrics;
sensing vehicle acceleration parameters;
executing one or more crash metrics that evaluate the vehicle acceleration parameters to determine whether the switched crash thresholds are exceeded; and
controlling deployment of the actuatable safety device in response to determining that the switched crash thresholds are exceeded,
wherein the pressure tube metrics comprise at least one of pressure tube sensor differential discrimination metrics and pressure tube sensor asymmetric split metrics, and wherein the pressure tube sensor differential discrimination metric evaluates a front pressure differential moving average absolute value against an upfront sensor acceleration moving average.