Angle Measuring System Angular Error Determination
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Solution Overview
Problem
Existing angle measuring systems for vehicles and other rotating elements require external calibration systems, which are time-consuming and costly, and often lead to inaccurate measurements at higher speeds due to non-constant delays and the need for expensive measurement hardware.
Innovation Solution
The method involves determining the angular error between a rotational angle value and a reference value within the evaluation unit's microcontroller, eliminating the need for external systems by sampling signals simultaneously and using the microcontroller to perform arithmetic operations, ensuring deterministic signal transmission and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external calibration systems are used to determine angular error, then measurement validation can be performed, but the process becomes time-consuming and costly
Solution Approach 1:
The invention extracts the reference angle sensor from the external calibration system and integrates it directly into the angle measurement system. By taking out the reference measurement function and embedding it within the microcontroller, the system eliminates the need for external calibration equipment and reduces calibration time while maintaining measurement precision.
Solution Approach 2:
The microcontroller serves as an intermediary that simultaneously processes both the angle sensor signals and reference angle sensor signals. This mediator integrates the calibration function within the existing control unit, eliminating time delays associated with external systems and enabling deterministic signal transmission for angular error calculation.
2Measurement precision
If external calibration systems are used, then angular error can be measured, but expensive measurement hardware is required
Solution Approach 1:
The invention merges the reference angle measurement function with the main angle measurement system by integrating both sensors and their processing within the same microcontroller. This combination eliminates the need for separate expensive external calibration hardware while maintaining the capability to determine angular error with high precision.
Solution Approach 2:
The angle measurement system performs its own calibration and validation by incorporating a reference angle sensor that provides internal reference measurements. The microcontroller independently calculates angular error by comparing the angle sensor output with the reference angle sensor output, making the system self-sufficient and eliminating dependency on external calibration equipment.
3Measurement precision
If external calibration systems are used, then angular error can be determined, but time delays occur that reduce accuracy at higher rotational speeds
Solution Approach 1:
The reference angle sensor continuously provides reference measurements in advance within the microcontroller, so that when angular error calculation is needed, both the angle sensor signal and reference angle signal are already available and synchronized. This preliminary preparation of reference data eliminates time delays that would otherwise occur with external calibration systems, enabling accurate measurements even at high rotational speeds.
Data Source
Figure 1~2
AI summary
The invention relates to an angle measuring system (100) and to a method for determining an angular error between a rotational angle value ascertained by means of an angle measuring system (100) and a reference value. The rotational angle value is ascertained from a rotational angle signal of a rotational angle sensor (110) in an analysis unit (120) of the angle measuring system (100), which has the rotational angle sensor (110) and the analysis unit (120). The reference value is ascertained from a reference angle signal in the analysis unit (120) of the angle measuring system (100), and the angular error between the rotational angle value and the reference value is determined in the analysis unit (120) of the angle measuring system (100).