Angular Velocity Sensor Temperature Compensation via Leakage Signal
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Solution Overview
Problem
Existing angular velocity detection systems face challenges in accurately compensating for temperature characteristics due to vibration leakage components, which often require higher-order temperature compensation circuits, leading to increased complexity and inefficiency.
Innovation Solution
An angular velocity detection apparatus that includes a vibrator, a driver section, an angular velocity signal generation section, a vibration leakage signal generation section, and an adder-subtractor section, which extracts and adjusts the vibration leakage signal to correct the temperature characteristics of the angular velocity signal without needing a higher-order compensation circuit, by adding or subtracting the vibration leakage signal in a specific ratio based on correlated temperature characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the vibration leakage component is enhanced to improve measurement precision, then the temperature characteristics of the angular velocity signal deteriorate due to the temperature characteristics of the vibration leakage component
Solution Approach 1:
The patent segments the temperature compensation into two independent parts: a first temperature compensation section that compensates for the angular velocity signal's temperature characteristics, and a second temperature compensation section that compensates for the vibration leakage signal's temperature characteristics. This segmentation allows each section to be optimized independently, preventing the vibration leakage component enhancement from deteriorating overall temperature characteristics stability.
Solution Approach 2:
The patent introduces temperature compensation sections as intermediary elements between the signal generation and the final output. These intermediary sections process and correct the temperature characteristics of both the angular velocity signal and the vibration leakage signal separately, acting as mediators that prevent temperature-induced distortions from affecting the final measurement precision.
2Reliability
If a higher-order temperature compensation circuit is used to correct the vibration leakage component's temperature characteristics, then the circuit scale increases
Solution Approach 1:
The patent divides the temperature compensation function into separate sections: a first temperature compensation section for the angular velocity signal and a second temperature compensation section for the vibration leakage signal. This segmentation allows the use of simpler, lower-order compensation circuits for each signal type rather than requiring a single complex higher-order circuit to handle both signals simultaneously.
Solution Approach 2:
The patent extracts the temperature compensation function from a single complex circuit and distributes it into separate, simpler sections that handle each signal independently. By taking out the temperature compensation requirement from the main signal processing path and implementing it through separate sections, the overall circuit complexity is reduced while maintaining compensation accuracy.
3Device complexity
If the vibration leakage component is extracted and added/subtracted in a given ratio to correct temperature characteristics, then the circuit design is simplified
Solution Approach 1:
The patent introduces temperature compensation sections as intermediary processing stages that operate on the vibration leakage signal before it is combined with the angular velocity signal. These intermediary sections prepare the vibration leakage signal by correcting its temperature characteristics, ensuring that when it is added or subtracted in a given ratio, the final angular velocity signal maintains high accuracy without introducing temperature-induced errors.
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
This approach allows for effective compensation of temperature characteristics in the angular velocity signal, simplifying the circuit design and improving accuracy without requiring higher-order temperature compensation circuits, thus enhancing the reliability and efficiency of angular velocity detection.
Implementation Method 1
a vibrator that generates a signal that includes an angular velocity component corresponding to the magnitude of an angular velocity, and a vibration leakage component of vibrations based on a drive signal
Implementation Method 2
an adder-subtractor section that adds the vibration leakage signal to the angular velocity signal, or subtracts the vibration leakage signal from the angular velocity signal, in a given ratio to correct temperature characteristics of the angular velocity signal
Data Source
AI summary
An angular velocity detection apparatus includes a vibrator that generates a signal that includes an angular velocity component and a vibration leakage component, a driver section that generates the drive signal, and supplies the drive signal to the vibrator, an angular velocity signal generation section that extracts the angular velocity component from the signal generated by the vibrator, and generates an angular velocity signal corresponding to the magnitude of the angular velocity component, a vibration leakage signal generation section that extracts the vibration leakage component from the signal generated by the vibrator, and generates a vibration leakage signal corresponding to the magnitude of the vibration leakage component, and an adder-subtractor section that adds the vibration leakage signal to the angular velocity signal, or subtracts the vibration leakage signal from the angular velocity signal, in a given ratio to correct temperature characteristics of the angular velocity signal.