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A circuit for correcting errors in the output signal from a gyro sensor

A gyroscope and circuit technology, applied in gyroscope/steering sensing equipment, instruments, gyro effect for speed measurement and other directions, can solve the problems of increasing the cost, complexity and electrical power consumption of the gyroscope sensor system

Active Publication Date: 2020-04-14
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing solutions for mitigating offset drift errors include complex closed-loop feedback circuits that increase the cost, complexity, and electrical power consumption of the gyroscope sensor system

Method used

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  • A circuit for correcting errors in the output signal from a gyro sensor
  • A circuit for correcting errors in the output signal from a gyro sensor

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Embodiment Construction

[0008] The following description and drawings provide a general understanding of the context of the systems and methods disclosed herein, as well as details of the systems and methods. In the drawings, like reference numerals are used to designate like elements throughout.

[0009] As used herein, the term in-phase signal refers to a signal from a sensor, such as a gyroscope sensor, that carries information from the sensor corresponding to a property measured by the sensor during operation. For example, an in-phase signal from a vibratory gyroscope is a modulated signal corresponding to the motion of a vibrating element in a gyro sensor.

[0010] As used herein, the term quadrature signal refers to another signal from the sensor that has a quadrature phase (90° phase offset) to the in-phase signal. The quadrature phase signal is also referred to as the quadrature error signal. Ideally, the in-phase signal is completely separated from the quadrature-phase signal. However, in...

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Abstract

A circuit for processing signals from a gyroscope includes a first that generates an in-phase demodulated signal and a second demodulator that generates a quadrature-phase demodulated signal with reference to in-phase and quadrature-phase modulated signals, respectively, from the gyroscope. The circuit includes a digital processor that receives the demodulated in-phase and quadrature phase signals from the demodulators and generates an output signal corresponding to a rotation of the gyroscope along a predetermined axis with reference to the in-phase demodulated signal and the quadrature-phase demodulated signal to remove a portion of the quadrature-phase signal from the in-phase signal.

Description

technical field [0001] The present disclosure relates generally to gyroscopic sensors, and more particularly, to circuits for correcting errors in output signals from gyroscopic sensors. Background technique [0002] Gyroscopes are commonly used to sense the rotation or attitude of an object along one or more axes of rotation. For example, gyroscopes have long been used in naval vessels, aircraft, and spacecraft to identify rotation of the ship and in stability control systems. More recently, gyroscopes have been incorporated into microelectromechanical (MEM) devices. While conventional gyroscopes rotate on an axis, MEMS gyroscopes typically include vibrating elements formed using photolithographic processes in integrated circuits suitable for mounting to printed circuit boards or with other electronic components. As the MEMS device rotates about the axis, the plane of oscillation of the vibrating element tends to remain constant, and the modulated electrical signal from t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/5776B81B7/02
CPCG01C19/5776G01C25/005
Inventor C·D·伊泽科维
Owner ROBERT BOSCH GMBH