Stress Compensation Circuit Using Sum and Difference Sensor Signals
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Solution Overview
Problem
Existing stress compensation circuits are unable to determine arbitrary mechanical stress components, limiting their effectiveness in compensating for mechanical stress impacts on electronic components.
Innovation Solution
A circuit comprising two sensors, one determining a signal based on the sum of normal stress components and the other based on the difference, with a processing unit to reduce disturbances caused by mechanical stress, allowing for individual determination and compensation of mechanical stress components σxx and σyy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If known stress compensation circuits are used, then the circuit structure is relatively simple, but they are not able to determine arbitrary mechanical stress components
Solution Approach 1:
The stress detection function is segmented into two specialized sensors: one configured to detect the sum of normal stress components (σxx + σyy) and another to detect the difference (σxx - σyy). This segmentation allows each sensor to be optimized for its specific measurement function while together they enable complete stress component determination through mathematical decomposition.
Solution Approach 2:
The patent transforms the stress measurement problem from direct component detection to indirect determination through sum and difference measurements. By measuring in the transformed domain (sum and difference) and then mathematically converting back to the original stress components, the system achieves arbitrary stress component determination without requiring direct sensing of each component individually.
2Measurement precision
If traditional single sensor stress detection is used, then the device complexity is low, but the measurement precision for individual stress components is insufficient
Solution Approach 1:
The measurement function is divided between two sensors with complementary configurations. The first sensor (e.g., with vertically oriented resistors) measures the sum of normal stress components, while the second sensor (e.g., with laterally oriented resistors) measures the difference. This functional segmentation enables precise determination of individual stress components through mathematical combination of the two measurements.
Solution Approach 2:
The patent changes the measurement parameters by configuring sensors to respond to different combinations of stress components (sum and difference) rather than individual components directly. This parameter transformation allows the system to extract precise information about individual stress components by solving the system of equations formed by the two sensor outputs.
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 effective compensation of mechanical stress impacts by determining arbitrary combinations of stress components, improving the stability and performance of electronic components by reducing disturbances caused by mechanical stress.
Implementation Method 1
a first sensor for determining a first signal based on a sum of a first normal stress component and a second normal stress component
Implementation Method 2
a second sensor for determining a second signal based on a difference between the first normal stress component and a second normal stress component
Data Source
AI summary
A carrier of an electronic circuit, the carrier including a first sensor for determining a first signal based on a sum of a first normal stress component and a second normal stress component, and a second sensor for determining a second signal based on a difference between the first normal stress component and a second normal stress component. Also, a corresponding circuit, method and device.