Rotation-Rate Sensor Calibration Using Frequency Split Detection
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Solution Overview
Problem
Existing rotation-rate sensors face challenges in reliably determining mechanical amplification and phase shift of deflection oscillatory motion due to stress loads, which affect sensitivity and stability, necessitating additional hardware and complicating miniaturization.
Innovation Solution
An electronic apparatus determines mechanical amplification and phase shift using frequency splits and phase shifts through equations, without requiring additional hardware, allowing for miniaturization and sensitivity correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensor systems are added to determine mechanical amplification and phase shift, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The existing sensor system is made multi-functional by using it not only for its primary measurement function but also for determining mechanical amplification and phase shift through frequency split measurements. The same drive and detector electrodes serve dual purposes, eliminating the need for separate sensor systems while maintaining measurement precision.
Solution Approach 2:
The system determines mechanical amplification and phase shift by measuring changes in frequency parameters (frequency split between drive and detection frequencies) rather than requiring additional physical sensors. This parameter-based approach allows precise determination using existing system characteristics.
2Reliability
If additional sensor systems are added to determine mechanical amplification and phase shift, then reliability under stress loads is improved, but manufacturing precision requirements increase
Solution Approach 1:
The existing sensor system is made multi-functional by using it not only for its primary measurement function but also for determining mechanical amplification and phase shift through frequency split measurements. The same drive and detector electrodes serve dual purposes, eliminating the need for separate sensor systems while maintaining measurement precision.
Solution Approach 2:
The system uses feedback from frequency split measurements to continuously determine and correct for changes in mechanical amplification and phase shift caused by stress loads. This feedback mechanism ensures reliable operation under varying conditions without requiring additional sensors or complex manufacturing precision.
3Adaptability or versatility
If additional sensor systems are added to determine mechanical amplification and phase shift, then correction capability is improved, but loss of substance increases
Solution Approach 1:
The existing sensor system is made multi-functional by using it not only for its primary measurement function but also for determining mechanical amplification and phase shift through frequency split measurements. The same drive and detector electrodes serve dual purposes, eliminating the need for separate sensor systems while maintaining measurement precision.
Solution Approach 2:
The sensor system performs self-diagnosis and self-correction by using its own frequency response characteristics to determine mechanical amplification and phase shift. The system serves itself by extracting correction information from its existing operational parameters without requiring external or additional sensing components.
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
Enables reliable determination and correction of mechanical amplification and phase shift, ensuring sensor stability and sensitivity, even under stress loads, facilitating miniaturization and recalibration.
Implementation Method 1
By means of an AC voltage applied between the at least one seismic mass and the at least one associated drive electrode, the at least one seismic mass can be put into a resonant harmonic drive oscillation
Implementation Method 2
A deflection oscillatory motion, triggered by a Coriolis force, of the at least one seismic mass put into harmonic drive oscillation
Implementation Method 3
A deflection oscillatory motion, triggered by a Coriolis force, of the at least one seismic mass put into harmonic drive oscillation can be detected by means of the at least one associated detector electrode
Data Source
AI summary
An operating device for a rotation-rate sensor. A mechanical amplification of a deflection oscillatory motion and/or a phase shift of the deflection oscillatory motion relative to a harmonic drive oscillation of a seismic mass can be determined using an electronic apparatus of the operating device by taking into account at least one drive frequency variable with respect to a characteristic drive frequency of the harmonic drive oscillation of the seismic mass of the rotation-rate sensor and by also taking into account at least one detection frequency variable, which is provided by the operating device itself to the operating device, with respect to a characteristic detection frequency of the deflection oscillatory motion, caused by a Coriolis force, of the seismic mass put into the harmonic drive oscillation or with respect to a difference between the characteristic drive frequency and the characteristic detection frequency.