Piezoelectric Force Sensor Shafting Misalignment Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Misalignments in powertrain shaftings on test benches due to assembly, manufacturing inaccuracies, and thermal expansion lead to distorting forces, affecting the function and operational life of rotating bodies, which existing technologies fail to detect and correct efficiently without additional vibration analyses or manual, optical methods.
Innovation Solution
A method utilizing piezoelectric force sensors to measure forces perpendicular to the rotational axis of the shafting, analyze these measurements for misalignment, and output target values for automated position corrections of the load or drive unit to minimize misalignment, eliminating the need for external alignment and reducing reliance on optical methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual optical methods or additional vibration analyses are used to detect misalignment, then measurement precision is improved, but device complexity and loss of time increase
Solution Approach 1:
The patent extracts the misalignment detection function from complex external systems (optical methods, vibration analysis) and integrates it into the existing force measurement system. By using the same piezoelectric force sensors already present in the test bench to detect misalignment through force flow analysis, the solution eliminates the need for separate detection systems while maintaining high measurement precision
Solution Approach 2:
The piezoelectric force sensors serve multiple functions: they simultaneously measure both the force flow during power transmission and the misalignment of the shafting. This multi-functionality allows a single component to perform what previously required separate specialized systems, reducing device complexity while maintaining detection precision
2Productivity
If automated position correction is implemented, then productivity is improved, but device complexity increases
Solution Approach 1:
The system implements a feedback loop where misalignment is detected through force measurements, target values for correction are calculated, position corrections are applied, and subsequent measurements verify the improvement. This automated feedback mechanism increases productivity by eliminating manual intervention while the correction logic is derived from the existing measurement system, minimizing additional complexity
Solution Approach 2:
The test bench system performs its own alignment correction using its existing sensors and actuators. The system determines target values for position correction and executes the correction automatically without requiring external manual alignment operations, enabling the system to service itself and improve productivity
3Manufacturing precision
If iterative measurement and correction cycles are performed, then manufacturing precision is improved, but loss of time increases
Solution Approach 1:
The system performs measurements and corrections during the normal operation of the test bench without requiring shutdowns or interruptions. Force measurements are taken during power transmission, and corrections are applied while the system remains operational, maintaining continuous useful action and eliminating time loss associated with traditional alignment procedures
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 precise detection and correction of misalignments directly on the test bench, preventing damage by automating the alignment process, reducing the need for highly qualified personnel, and eliminating the requirement for additional vibration analyses or optical methods, thus enhancing machine safety and efficiency.
Implementation Method 1
at least one piezoelectric force sensor is arranged in a path of force via which a force flow can be transmitted
Data Source
AI summary
The invention relates to a method for correcting a misalignment of at least one shafting of a powertrain on a test bench, where at least one piezoelectric force sensor is arranged in a path of force via which a force flow can be transmitted between a load unit of the test bench and a drive unit of the powertrain or the test bench during a transmission of power via the shafting, comprising: performing a force measurement in at least one plane and/or perpendicular to the at least one plane which is intersected by a rotational axis of the shafting and may be substantially perpendicular to the rotational axis; analyzing a measured value or a measured value progression of the force measurement for detecting a misalignment of the shafting; determining target values for a position correction of the load unit or the drive unit in order to minimize the misalignment; and outputting the target values.