MEMS Wheel Alignment Sensor with Digital Signal Processing
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Solution Overview
Problem
Existing wheel alignment systems face issues with the size, cost, reliability, temperature sensitivity, limited resolution, and accuracy of inclination sensors, particularly micro electromechanical sensors (MEMS), which can be exacerbated by external components adding bulk and introducing stray capacitance.
Innovation Solution
A wheel alignment system incorporating an encapsulated package with a micro electromechanical sensor and a digital signal processing system that includes temperature and sensor compensation algorithms to enhance the accuracy, resolution, and output response of the MEMS sensor, while minimizing external components and improving signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If micro electromechanical sensors (MEMS) are used for wheel alignment measurement, then the sensor size and cost are reduced, but the temperature sensitivity, resolution, and accuracy deteriorate
Solution Approach 1:
The patent combines the MEMS sensor with a digital signal processing system and temperature compensation algorithm into an integrated package. This merging allows the small MEMS sensor to be compensated for its deficiencies through electronic processing, maintaining small size while improving accuracy and temperature independence.
Solution Approach 2:
The patent applies parameter changes by using digital signal processing to modify the output signal from the MEMS sensor. The processing system adjusts parameters such as gain, offset, and temperature compensation factors to correct the sensor's temperature sensitivity and improve measurement accuracy across different operating conditions.
2Measurement precision
If external components are added to compensate for MEMS sensor deficiencies, then the accuracy and temperature independence are improved, but the device complexity and bulk increase
Solution Approach 1:
The patent merges the digital signal processing system and temperature compensation algorithms into an integrated package with the MEMS sensor. This integration reduces device complexity compared to using separate external components, while still providing accurate compensation for temperature effects and sensor deficiencies.
3Temperature
If external components are added to compensate for MEMS sensor deficiencies, then the temperature independence is improved, but the stray capacitance and cost increase
Solution Approach 1:
The patent integrates the temperature compensation algorithm directly with the MEMS sensor in a unified package, eliminating the need for separate external compensation components. This integration reduces stray capacitance while maintaining temperature independence through digital processing of the sensor output.
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 provides improved accuracy, resolution, and temperature independence for wheel alignment measurements, reducing the need for additional external components and compensating for MEMS sensor deficiencies, thereby enhancing the reliability and cost-effectiveness of the system.
Implementation Method 1
a micro electromechanical sensor configured to sense inclination of the micro electromechanical sensor
Implementation Method 2
a digital signal processing system configured to compensate for a deficiency in the wheel alignment sensor
Data Source
AI summary
A wheel alignment system may include a wheel alignment sensor configured to provide information relevant to the inclination of the wheel. The wheel alignment sensor may contain an encapsulated package. The encapsulated package may contain a micro electromechanical sensor configured to sense inclination of the micro electromechanical sensor and a digital signal processing system configured to compensate for a deficiency in the wheel alignment sensor. The wheel alignment system may also include a wheel alignment processing system associated with the wheel alignment sensor and configured to receive and process the information relevant to the inclination of the wheel from the wheel alignment sensor and to provide useful output relating to the information about the inclination of the wheel.