Patent ID: 7761206

Claim:
A passenger protection apparatus, comprising: a rollover angular speed detection device, which detects a rollover angular speed during vehicle rollover; a rollover determination device, which conducts a determination of the vehicle rollover based on the rollover angular speed detected by the rollover angular speed detection device and a rollover angle obtained from the rollover angular speed; a passenger protector, which operates in accordance with a determination result of the rollover determination device to protect a passenger; a vertical G sensor, which detects an acceleration of an up and down direction of the vehicle; a horizontal G sensor, which detects an acceleration of a right and left direction of the vehicle; and an angular speed sensor error determination device, which determines whether or not a zero-point drift of the rollover angular speed detection device is observed by comparing a previously set error determination threshold, based on a detected signal of the vertical G sensor or the horizontal G sensor, and said rollover angular speed from the rollover angular speed detection device.