Angular Velocity Detection Circuit Temperature Compensation
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Solution Overview
Problem
Existing angular velocity detection apparatuses face challenges in accurately distinguishing between variations in self-vibration component amplitudes caused by temperature characteristics and those caused by failures, making it difficult to determine resonator failures with high accuracy.
Innovation Solution
An angular velocity detection circuit that includes a self-vibration component extraction unit, a direct-current conversion unit with integration, and a temperature characteristic compensation unit, which compensates for temperature-induced variations in the self-vibration component, allowing for more accurate failure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amplitude of self-vibration component is used for failure detection, then failure detection capability is provided, but temperature variations cause false detection due to inability to distinguish temperature-induced amplitude changes from failure-induced changes
Solution Approach 1:
The patent segments the self-vibration component analysis by separating temperature effects from failure effects. It extracts the self-vibration component from the detection signal, then separately compensates for temperature characteristics before performing failure detection. This segmentation allows independent handling of temperature compensation and failure detection functions.
Solution Approach 2:
The patent introduces a temperature characteristic compensation unit as an intermediary between the self-vibration component extraction and failure determination. This intermediary component processes the self-vibration signal by removing temperature-induced variations, thereby enabling accurate failure detection without temperature interference.
2Measurement precision
If temperature characteristic compensation is applied, then failure detection accuracy is improved, but device complexity increases due to additional compensation circuitry
Solution Approach 1:
The temperature characteristic compensation unit is designed to handle multiple aspects of temperature variation effects simultaneously. It processes the self-vibration component to compensate for various temperature-induced changes in a unified manner, reducing the need for separate compensation mechanisms for different temperature effects.
Solution Approach 2:
The patent compensates for temperature characteristics by adjusting parameters of the self-vibration component signal. It applies parameter transformations to the extracted self-vibration signal to eliminate temperature dependencies, thereby simplifying the compensation process compared to hardware-based temperature stabilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the detection of resonator failures with increased accuracy by isolating and compensating for temperature-related variations, thereby improving the reliability of angular velocity detection.
Implementation Method 1
a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity... a detection signal including an angular velocity component based on a Coriolis force
Implementation Method 2
a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit
Data Source
AI summary
An angular velocity detection circuit is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity. The angular velocity detection circuit includes: a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and a temperature characteristic compensation unit that compensates for a variation due to a temperature in an output signal of the direct-current conversion unit.