Inertial sensor
First Claim
1. An inertial sensor comprising:
- an oscillator;
a drive unit for oscillating the oscillator;
a sensor for sensing an amount of angular velocity applied to the oscillator; and
a failure diagnosis unit disposed between the oscillator and the drive unit, whereinthe drive unit includes;
a reference potential supply unit amplifier for supplying a reference potential to an electrode of the oscillator; and
a drive signal supply unit for supplying a drive signal to the oscillator based on a monitor signal received from the oscillator, andwherein the failure diagnosis unit measures the reference potential and includes;
a diagnosis unit for diagnosing a failure based on a value of a current supplied by the reference potential supply unit to the oscillator in the drive unit or the oscillator based on the reference potential, and being disposed between the reference potential supply amplifier and the electrode of the oscillator.
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Accused Products
Abstract
An inertial sensor includes an oscillator, a drive unit for oscillating the oscillator, a sensor for sensing the amount of inertia applied to the oscillator, and a failure diagnosis unit disposed between the oscillator and the drive unit. The drive unit includes a reference potential supply unit for supplying a reference potential to the oscillator, and a drive signal supply unit for supplying a drive signal to the oscillator based on a monitor signal received from the oscillator. The failure diagnosis unit includes a diagnosis unit for diagnosing a failure based on the value of a current supplied by the reference potential supply unit to the oscillator. The inertial sensor having this structure can detect a failure in the drive unit or the oscillator.
6 Citations
8 Claims
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1. An inertial sensor comprising:
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an oscillator; a drive unit for oscillating the oscillator; a sensor for sensing an amount of angular velocity applied to the oscillator; and a failure diagnosis unit disposed between the oscillator and the drive unit, wherein the drive unit includes; a reference potential supply unit amplifier for supplying a reference potential to an electrode of the oscillator; and a drive signal supply unit for supplying a drive signal to the oscillator based on a monitor signal received from the oscillator, and wherein the failure diagnosis unit measures the reference potential and includes; a diagnosis unit for diagnosing a failure based on a value of a current supplied by the reference potential supply unit to the oscillator in the drive unit or the oscillator based on the reference potential, and being disposed between the reference potential supply amplifier and the electrode of the oscillator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An inertial sensor comprising:
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an oscillator; a drive unit for oscillating the oscillator; a sensor for sensing an amount of angular velocity applied to the oscillator; and a failure diagnosis unit for diagnosing a failure in the drive unit or the oscillator, wherein the drive unit includes; a reference potential supply amplifier for supplying a reference potential to an electrode of the oscillator; and a drive signal supply unit for supplying a drive signal to the oscillator based on a monitor signal received from the oscillator, and wherein the failure diagnosis unit receives the reference potential, and diagnoses the failure by measuring the reference potential.
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Specification