Vehicle Level Determination via Chassis Sensor Signal Filtering
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Solution Overview
Problem
Existing methods for determining a vehicle's actual level are inadequate, particularly when dealing with strong excitation from road unevenness, as they often require intensive parameterization and are not independent of vehicle-specific components or operating parameters.
Innovation Solution
A method that uses a chassis sensor to detect signals including both vehicle movement and road excitation, filters out the vehicle's own movement using a selected filter function, and calculates the actual vehicle level from the difference between filtered and raw signals, allowing for a signal-based, vehicle-independent determination of the level without requiring specific parameterization or knowledge of chassis components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensor-based methods are used to determine vehicle level, then the measurement can be obtained, but the system requires intensive parameterization and is dependent on vehicle-specific components
Solution Approach 1:
The patent extracts only the necessary information (vehicle level) directly from the sensor signal without requiring extensive parameterization or vehicle-specific calibration. By using the raw sensor signal in combination with filter functions, the system obtains the desired measurement while eliminating the need for complex setup procedures.
Solution Approach 2:
The system uses the sensor signal itself to determine the vehicle level without requiring external parameterization or vehicle-specific component knowledge. The method is self-sufficient, using only the sensor data and standard filter functions to achieve the measurement.
2Measurement precision
If conventional filtering methods are used to separate vehicle movement from road excitation, then signal processing can be performed, but the process is time-consuming and requires extensive calibration
Solution Approach 1:
The patent applies filter functions directly to the sensor signal to separate vehicle movement from road excitation in real-time. By using predefined filter functions that are applied immediately to the raw signal, the system achieves fast separation without requiring preliminary calibration or extensive processing setup.
3Measurement precision
If vehicle-specific parameterization is used to improve measurement accuracy, then the determination can be more precise, but the system cannot be applied across various vehicles without extensive calibration
Solution Approach 1:
The patent creates a universal method that can be applied to any vehicle equipped with a chassis sensor, regardless of the specific vehicle type or sensor model. By using generic filter functions and avoiding vehicle-specific parameterization, the system achieves both accuracy and broad applicability across different vehicle platforms.
Data Source
AI summary
A method for determining an actual level of a vehicle, includes determining an actual level of the vehicle as a function of a distance between at least one wheel of the vehicle and a superstructure of the vehicle, wherein the distance is determined by means of a signal detected by at least one chassis sensor, wherein the signal includes at least signal portions that correspond to an own movement of the vehicle and signal portions that correspond to an excitation by a road on which the vehicle actually drives; filtering the signal portions corresponding to the own movement of the vehicle out of the signal detected by the at least one chassis sensor by means of a filter function; calculating the actual level of the vehicle from a difference between the filtered signal without the signal portions that correspond to the own movement of the vehicle and the signal detected by the at least one chassis sensor.