MEMS Sensor Calibration via Thermal Element
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Solution Overview
Problem
MEMS devices are susceptible to external influences that can render sensor calibration unreliable or unusable, and existing methods do not effectively account for environmental changes, necessitating a solution for periodic calibration adjustments.
Innovation Solution
Incorporating a thermal element within the MEMS device that can be selectively energized to adjust the temperature, allowing for the determination and storage of correction values for sensor measurements based on temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MEMS sensors are calibrated under fixed conditions, then initial calibration can be completed, but the calibration becomes unreliable when subjected to external environmental influences
Solution Approach 1:
The patent implements dynamic calibration by periodically adjusting sensor calibration parameters based on current environmental conditions. The system transitions from static initial calibration to continuous adaptive calibration, where calibration values are updated in response to changing temperature, pressure, or other environmental factors, thereby maintaining measurement precision across varying conditions
Solution Approach 2:
The system changes calibration parameters dynamically based on environmental conditions. Sensors undergo periodic recalibration with updated parameters that reflect current environmental states, allowing the measurement system to adapt to temperature variations, humidity changes, and other external influences that would otherwise degrade calibration reliability
2Reliability
If periodic calibration is implemented to account for environmental changes, then calibration reliability improves, but device complexity and calibration operation requirements increase
Solution Approach 1:
The calibration system operates autonomously by automatically detecting environmental condition changes and initiating periodic recalibration operations without requiring manual intervention. The system self-manages the calibration process, selecting appropriate calibration parameters and applying corrections based on current conditions, thereby improving reliability while minimizing the operational burden on users
Solution Approach 2:
The patent implements periodic calibration operations at predetermined intervals or when environmental thresholds are exceeded. This structured approach balances the need for reliable calibration with system complexity by performing calibration only when necessary, rather than continuously or manually, thereby maintaining accuracy while reducing operational overhead
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 enhances the reliability of sensor calibration by enabling adaptive temperature adjustments, improving the accuracy of sensor measurements and maintaining calibration consistency across varying environmental conditions.
Implementation Method 1
A thermal element is disposed in the MEMS device. The thermal element is selectively energized to adjust a temperature of the MEMS device.
Data Source
AI summary
A device and method for a MEMS device with at least one sensor is disclosed. A thermal element is disposed in the MEMS device to selectively adjust a temperature of the MEMS device. A calibration operation is initiated for the sensor to determine a correction value to be applied to the sensor measurement based on the temperature. The correction value is stored.