Method and apparatus for determining a vehicle pitch-over condition

摘要

An apparatus for determining a pitch-over condition of a vehicle comprises a first accelerometer for sensing acceleration in a Z-axis direction substantially perpendicular to both a front-to-rear axis of the vehicle and a side-to-side axis of the vehicle and for providing a first acceleration signal indicative thereof. A second accelerometer for senses acceleration in an X-axis direction substantially parallel to said front-to-rear axis of the vehicle and provides a second acceleration signal indicative thereof. A controller determines a Z-axis velocity value from the first acceleration signal and a pitch-over condition of the vehicle in response to both the determined Z-axis velocity value and the second acceleration signal.

主权项

1. An apparatus for determining a pitch-over condition of a vehicle, said apparatus comprising:
a first accelerometer for sensing acceleration in a Z-axis direction substantially perpendicular to both a front-to-rear axis of the vehicle and a side-to-side axis of the vehicle and for providing a first acceleration signal indicative thereof; a second accelerometer for sensing acceleration in an X-axis direction substantially parallel to said front-to-rear axis of the vehicle and for providing a second acceleration signal indicative thereof; and a controller for determining a Z-axis velocity value from the first acceleration signal and determining a pitch-over condition of the vehicle in response to both the determined Z-axis velocity value and the second acceleration signal, wherein said controller determines an X-axis acceleration value from said second acceleration signal as a function of displacement in said Z-axis direction.