Dual-Sensor Current Module for Wide-Range Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current detecting modules and testers are limited in their ability to measure currents across a wide range of values with varying degrees of accuracy, requiring users to switch between devices for different measurement needs.
Innovation Solution
A current detecting module with a circular shell, ferrite core, and two sensor elements (first and second sensor elements) that generate distinct sensing signals for different current ranges, allowing users to select the appropriate signal for processing and display, enabling measurement of currents between 0 and 40 A with 0.01 A accuracy and between 0 and 600 A with 0.1 A accuracy without device replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a current detecting module is designed for a specific current range with high accuracy, then measurement precision is improved, but adaptability deteriorates because the device cannot measure currents outside its specified range
Solution Approach 1:
The current detecting module is segmented into multiple sensor elements, each optimized for different current ranges. The first sensor element measures currents with 0.01A accuracy in its optimal range, while the second sensor element measures larger currents with 0.1A accuracy. This segmentation allows the system to maintain high measurement precision across a wide overall current range by selecting the appropriate sensor element for each measurement task.
Solution Approach 2:
The current detecting module achieves multi-functionality by integrating multiple sensor elements with different measurement characteristics into a single device. The switching element enables the module to universally measure currents across multiple ranges (both small currents with high precision and large currents with appropriate precision) without requiring separate dedicated devices, thus improving adaptability while maintaining measurement accuracy.
2Adaptability or versatility
If multiple current detecting modules with different ranges are used to cover various measurement needs, then adaptability is improved, but device complexity increases
Solution Approach 1:
Multiple sensor elements that would traditionally require separate detecting modules are merged into a single current detecting module. The first sensor element and second sensor element are integrated within the same housing, sharing common components such as the magnetic core and switching element. This merging reduces the number of separate devices from two or more to one, simplifying the system while maintaining the ability to measure currents across multiple ranges with appropriate accuracy.
Solution Approach 2:
The current detecting module is designed as a universal device that can handle multiple measurement scenarios. By integrating multiple sensor elements with different measurement ranges and accuracies into one module, the device can universally measure both small currents (0-40A with 0.01A accuracy) and large currents (0-600A with 0.1A accuracy) without requiring users to switch between multiple specialized devices.
3Device complexity
If a single sensor element is used in the current detecting module, then device complexity is reduced, but measurement precision deteriorates for currents outside the optimal detection range
Solution Approach 1:
The sensor system is segmented into multiple specialized sensor elements, each optimized for specific current ranges. The first sensor element provides high precision (0.01A accuracy) for smaller currents, while the second sensor element provides appropriate precision (0.1A accuracy) for larger currents. This segmentation ensures that measurement precision is maintained across the entire current range by selecting the optimal sensor element for each measurement task.
Solution Approach 2:
The system dynamically selects the appropriate sensor element based on the current being measured. The switching element enables dynamic switching between the first and second sensor elements depending on the current magnitude and required accuracy. This dynamic adaptation ensures optimal measurement precision is achieved for each measurement scenario without requiring manual intervention or complex calibration.
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 convenient and accurate measurement of currents across multiple ranges using a single device, improving user experience by allowing selection of the appropriate sensing signal for different testing environments and requirements.
Implementation Method 1
a magnetic field sensor, which senses the magnetic field generated by a current and outputs a sensing signal that corresponds to the value of the current
Implementation Method 2
The first sensor element and the second sensor element sense the magnetic field running through the ferrite core and produce a first sensing signal and a second sensing signal
Data Source
AI summary
A current detecting module includes a circular shell with a ferrite core, a first sensor element, and a second sensor element disposed within. The first sensor element and the second sensor element sense the magnetic field confined in the magnetic circuit formed by the ferrite core, and generate a first sensing signal and a second sensing signal respectively. A current tester includes a device body, and the current detecting module is assembled with the device body. The device body includes a switching element, a monitor module and a signal processing module. The signal processing module receives the first sensing signal or the second sensing signal, and controls the monitor module to display a measured value accordingly. With two different sensing signals, the current detecting module or the current tester can be used to measure different ranges of currents and achieve high accuracy at the same time.