Current Sensor Correction Circuit for Miniaturized Conductor Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Miniaturization of current sensors leads to inaccuracies and measurement errors due to the influence of the surrounding geometry and contact geometry, particularly when the conductor is integrated with the sensor, as conventional calibration methods fail to account for the real environment where the sensor is used.
Innovation Solution
A current sensor device that includes a current sensing element and a correction circuit to generate an output signal based on both the measurement of the current and information about the current path, such as direction and magnitude, allowing for calibration factors or correction values to be applied to improve measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the conductor portion is miniaturized to reduce power dissipation and heat generation, then energy loss is reduced, but measurement precision deteriorates due to increased influence of surrounding geometry and contact geometry
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements before actual current measurement. The calibration process captures influence factors (such as contact geometry and surrounding structure) in advance and stores them for later compensation. This allows the miniaturized sensor to maintain accuracy by pre-characterizing environmental influences.
Solution Approach 2:
The patent implements feedback by using calibration data to compensate for measurement errors in real-time. The system measures influence factors during calibration, processes this information to determine correction values, and applies these corrections to subsequent measurements. This closed-loop approach maintains measurement precision despite miniaturization effects.
2Volume of moving object
If the conductor portion length is decreased and width is increased for miniaturization, then device size is reduced, but measurement precision deteriorates due to geometric influence
Solution Approach 1:
The patent performs preliminary calibration measurements that capture the specific geometric configuration of the miniaturized conductor portion and its surroundings. By measuring influence factors before actual operation, the system creates a correction profile specific to that device's geometry, enabling accurate measurements despite the reduced size and altered dimensions.
Solution Approach 2:
The patent changes parameters by introducing correction values based on measured influence factors. The calibration process determines specific correction parameters (such as offset values and scaling factors) that compensate for the geometric effects of miniaturization. These parameter adjustments restore measurement accuracy without requiring larger physical dimensions.
3Device complexity
If conventional calibration methods are used without accounting for real environment, then device complexity is reduced, but measurement precision deteriorates due to unaccounted environmental influences
Solution Approach 1:
The patent performs preliminary calibration in the actual operating environment before deployment. By measuring influence factors (contact geometry, surrounding structures, temperature) during calibration, the system captures real environmental conditions. This preliminary characterization enables accurate measurements without requiring complex real-time environmental sensing during operation.
Solution Approach 2:
The patent creates a calibration model that copies or represents the actual environmental influences. Instead of directly measuring all environmental parameters during operation, the system creates a simplified representation (correction values) of the environmental effects during calibration. This copy allows accurate compensation without adding complex sensing infrastructure during actual measurement.
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
The solution enables accurate current measurement by compensating for environmental influences, allowing for the use of miniaturized conductor portions with decreased length and increased width, while maintaining required accuracy, and adjusting the measured current by not more than 10%.
Implementation Method 1
magnetic current sensors, which measure a magnetic field generated by an electric current
Data Source
AI summary
Devices and methods associated with current measurements are provided. A current in a conductor portion may be measured by a current sensing element. An output signal indicative of the current may be generated based on the measured current and information regarding a current path.