Whether or not the self diagnostic device and self diagnostic manner of the accelerating or angular velocity sensor, the sensor itself which detects the accelerating or angular velocity sensor, and acceleration or

摘要

PPROBLEM TO BE SOLVED: To provide a self-diagnostic device for an acceleration or angular-velocity sensor, for performing exact self-diagnosis even when an impact is applied to the acceleration or angular-velocity sensor from the outside during self diagnosis. PSOLUTION: The self-diagnosis device 10 for an acceleration sensor 1 includes a diagnostic control part 13, an integration operation device 11 and a determination part 12. The diagnostic control part 13 provides dummy acceleration or angular velocity to the sensor body 8 for detecting acceleration or angular velocity by applying a dummy acceleration signal 14 of a predetermined magnitude to a sensor body 8 for detecting acceleration or angular velocity. The integration operation part 11 performs integration operation of a sensor signal 17 output from the sensor body 8 in response to the dummy acceleration signal 14. The determination part 12 determines whether or not an integration value 18 is within a predetermined normal range when a predetermined integration time elapses after start of the integration operation. PCOPYRIGHT: (C)2010,JPO&INPIT