Apparatus and method for controlling automatic gain of inertial sensor
First Claim
1. An automatic gain control apparatus of an inertial sensor, comprising:
- an inertial sensor that detects accelerations and angular velocities of the corresponding axes based on vibrations of driving masses and Coriolis forces for each axis;
a driving unit that vibrates the driving mass in a direction of the corresponding axis by applied driving voltage;
a detection unit that detects a driving displacement of the driving mass vibrated by the driving unit;
a state determination unit that compares the detected driving displacement with a preset target value to determine a state of the driving mass and generates an AGC control signal according to the state of the driving mass; and
a control unit that includes an AGC controlling to compensate for the driving displacement of the driving mass when the state of the driving mass is abnormal and performs a control to wake-up the AGC or convert the AGC into a sleep mode according to the AGC control signal input from the state determination unit to operate the AGC at the corresponding driving rate.
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Abstract
Disclosed herein are an apparatus and a method for controlling an automatic gain of an inertial sensor. The automatic gain control apparatus of an inertial sensor includes: an inertial sensor; a driving unit; a detection unit; a state determination unit generates an AGC control signal according to the state of the driving mass; and a control unit that includes an AGC controlling to compensate for the driving displacement of the driving mass when the state of the driving mass is abnormal and performs a control to wake-up the AGC or convert the AGC into a sleep mode according to the AGC control signal input from the state determination unit to operate the AGC at the corresponding driving rate.
13 Citations
10 Claims
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1. An automatic gain control apparatus of an inertial sensor, comprising:
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an inertial sensor that detects accelerations and angular velocities of the corresponding axes based on vibrations of driving masses and Coriolis forces for each axis; a driving unit that vibrates the driving mass in a direction of the corresponding axis by applied driving voltage; a detection unit that detects a driving displacement of the driving mass vibrated by the driving unit; a state determination unit that compares the detected driving displacement with a preset target value to determine a state of the driving mass and generates an AGC control signal according to the state of the driving mass; and a control unit that includes an AGC controlling to compensate for the driving displacement of the driving mass when the state of the driving mass is abnormal and performs a control to wake-up the AGC or convert the AGC into a sleep mode according to the AGC control signal input from the state determination unit to operate the AGC at the corresponding driving rate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An automatic gain control method of an inertial sensor, comprising:
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(A) vibrating a driving mass of an inertial sensor by driving voltage applied to a driving unit; (B) detecting a driving displacement of the vibrating driving mass; (c) comparing the detected driving displacement with a preset target value to determine a state of the driving mass and generating and outputting an AGC control signal according to the state of the driving mass; and (D) waking-up an AGC performing a control to compensate for the driving displacement of the driving mass to be operated at the corresponding driving rate and convert into a sleep mode according to the AGC control signal when the state of the driving mass is abnormal. - View Dependent Claims (8, 9, 10)
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Specification