Torque Determination via Aggregated Pulse Phase Difference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for determining torque applied to rotating shafts in work vehicles are inaccurate, leading to inefficiencies and potential overuse of vehicle components, as they lack robustness and effectiveness in measuring torque across various applications.
Innovation Solution
A system and method that analyze the phase difference of pulse trains generated by sensors at multiple axial positions on a rotating shaft to determine torque, using controllers to calculate delta phase values and derive torque values based on physical parameters, enhancing accuracy and control of vehicle operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing torque determination systems are used, then the system is simple to implement, but the measurement precision is poor leading to inaccurate torque assessment
Solution Approach 1:
The shaft is divided into multiple axial positions with sensors placed at each position. Each sensor independently measures phase information, and the controller segments the analysis by comparing pulse trains from different axial positions to calculate phase differences, which are then aggregated to determine torque. This segmentation approach improves measurement accuracy without requiring a single complex sensor system.
Solution Approach 2:
The patent introduces phase information as an intermediary measurement parameter. Instead of directly measuring torque, the system measures phase differences between pulse trains at different axial positions, aggregates these phase differences, and then calculates torque from the aggregated phase data. This intermediary approach enables accurate torque determination through a manageable system architecture.
2Reliability
If torque capacity of load components is increased to prevent overuse, then reliability improves, but loss of substance increases due to use of larger components than required
Solution Approach 1:
The system continuously monitors torque by analyzing phase differences between pulse trains at different axial positions. The controller aggregates phase difference values and calculates real-time torque, providing feedback information that can be used to prevent component overload. This accurate real-time feedback enables using components with torque capacities matched to actual requirements rather than excessive safety margins.
Data Source
AI summary
A system and method determines torque applied to a rotating shaft by a load. Two sensors determine the rotation of the shaft at two spaced-apart axial positions. Controller(s) analyze two pulse trains associated with signals received from the sensors corresponding to rotation of the shaft at the respective axial positions under the load. The controller(s) determine a delta phase value for each pulse of one pulse train with respect to a corresponding pulse of another pulse train, and aggregate each delta phase value for a prescribed period of pulses to determine an aggregate delta phase value. The controller(s) determine a load phase value as a ratio of the aggregate delta phase value to the prescribed period, a total delta phase value as a difference between the load phase value and a reference phase value, and a torque value from the load based on the total delta phase value and physical parameters of the shaft.