Patent ID: 6089091
Filing Date: 2000-07-18
Classification: G01C,G01P,G01S

Abstract:
An angular velocity sensor comprising:an output terminal for taking out an angular velocity output from a detector comprising a driving part, drive means for driving said driving part and detection means for detecting an angular velocity output; andself diagnosis means for outputting a signal for self diagnosis by detecting a mechanical coupling signal other than an angular velocity signal from said detector,wherein said detector comprises a tuning fork type driver part and detector plates attacked at the ends of both driver plates composing said driver part and in an orthogonal direction to said driver plates,wherein detected mechanical coupling signal caused by a mechanical coupling between said detector plates is a self diagnosis signal, andwherein a mechanical coupling signal obtained from said detector plates is supplied to a charge amplifier, a rectifier, a filter, and a judge circuit,said angular velocity sensor having a composition to initially set a sum of mechanical coupling signals obtained from said two detector plates to zero.