Electrical Parameter Measurement Error Reduction
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Solution Overview
Problem
Existing methods for determining electrical parameters like resistance and capacitance in electrical components are prone to errors due to electromagnetic interference and noise, leading to inaccurate measurements, especially in industrial settings where high precision is required but often not achieved.
Innovation Solution
A method involving multiple measurements at different constant currents, with voltage values scaled using a profile factor and filtered through a tolerance range to reduce systematic and random errors, allowing for accurate determination of electrical parameters like resistance, capacitance, and impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple measurements are performed to improve measurement accuracy, then measurement precision is improved, but measurement time increases
Solution Approach 1:
The patent applies preliminary action by performing multiple measurements and evaluating their plausibility before final parameter determination. The system pre-assesses measurement results using profile factors and plausibility checks to identify and exclude incorrect measurements early in the process, preventing wasted time on obviously erroneous data while maintaining high measurement accuracy through selective repetition of measurements when needed.
2Productivity
If measurements are performed in noisy industrial environments, then productivity is maintained, but measurement precision deteriorates due to electromagnetic interference
Solution Approach 1:
The patent implements feedback mechanisms by continuously monitoring measurement results for plausibility using profile factors derived from multiple measurements. The system compares each measurement against expected profiles and provides feedback to identify deviations caused by electromagnetic interference. When incorrect measurements are detected, the system triggers re-measurement or exclusion of erroneous data, maintaining measurement accuracy while operating at high productivity in noisy industrial environments.
3Measurement precision
If high measurement accuracy is required, then measurement precision is improved, but device complexity increases due to multiple measurement requirements
Solution Approach 1:
The patent applies segmentation by dividing the measurement process into distinct evaluation stages: initial multiple measurements, profile factor calculation, plausibility assessment, and final parameter determination. This segmented approach allows the system to achieve high measurement accuracy through systematic evaluation of multiple measurements while managing device complexity by organizing the process into modular, manageable steps with clear decision points for accepting or rejecting measurements.
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
This approach significantly enhances measurement accuracy by minimizing the impact of noise and interference, resulting in highly reliable electrical parameter determination, particularly suitable for battery testing in automotive applications.
Implementation Method 1
measuring, at terminals of electrical components, preferably of a battery, at least one, and preferably multiple, first electrical voltage values at a first constant measurement current and measuring at least one, preferably multiple, second electrical voltage values at a second constant measurement current
Data Source
AI summary
Before technical components are further processed, they are checked for the functionality thereof. In this case, an incorrect judgment of the functionality can occur due to measurement errors or incorrect measurements, which in turn results in a very inefficient test. The invention provides a method and a device by which an increased measurement accuracy can be achieved. This is achieved in that at least one first electrical voltage value is measured at a first constant measurement current and at least one second electrical voltage value is measured at a second constant measurement current at terminals of the component. Every measured voltage value is scaled respectively using a profile factor PF to form a measured value M, and only measured values M that are located at least with a tolerance range in a common value range are used for the determination of an electrical parameter.