Magnetic Current Sensor with Self-Calibration and Modular Housing
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Solution Overview
Problem
Current current sensor technologies are difficult to install, require complex calibration, and lack integrated processing, display, and communication capabilities, making them unsuitable for mission-critical applications that demand real-time monitoring and rapid response to current anomalies.
Innovation Solution
A current metering and monitoring system (MMS) with integrated self-calibration, processing, and communication capabilities, featuring a modular design with quick-release housing and high-bandwidth sensors that can detect both AC and DC currents, allowing for easy installation and adaptation to various conductor configurations, and providing real-time data analysis and alarm functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional current sensors are used, then current monitoring function is provided, but installation is difficult and requires disconnection of conductors
Solution Approach 1:
The patent replaces traditional mechanical installation methods (requiring conductor disconnection and physical assembly) with a magnetic field-based sensing approach. The sensor assembly uses magnetic field detection to measure current without electrical contact, allowing installation around conductors without disconnection, thereby simplifying the installation process while maintaining monitoring functionality.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the current-carrying conductor and the sensor. Instead of direct electrical contact or mechanical connection to the conductor, the sensor detects the magnetic field generated by the current, which acts as a mediator that enables non-intrusive measurement and simplifies installation.
2Measurement precision
If traditional current sensors are used, then current measurement is achieved, but complex calibration procedures are required
Solution Approach 1:
The patent implements self-calibration functionality where the sensor assembly automatically adjusts and verifies its own measurement accuracy without requiring external calibration equipment or skilled operators. The system performs self-diagnosis and calibration routines, eliminating the need for complex manual calibration procedures while maintaining measurement precision.
Solution Approach 2:
The patent incorporates preliminary calibration data and correction factors into the sensor assembly during manufacturing. The system pre-configures calibration parameters and performs initial calibration before deployment, so that during operation it only requires simple verification rather than complex calibration procedures, thereby reducing on-site calibration complexity.
3Extent of automation
If individual current sensors are used, then current detection is provided, but integrated processing and communication capabilities are lacking
Solution Approach 1:
The patent combines multiple functions (current sensing, signal processing, data analysis, and communication) into a single integrated sensor assembly. The sensor assembly includes embedded processing circuitry and communication interfaces, merging what would traditionally be separate components into one unified device, thereby enabling automated processing and communication while simplifying system integration.
Solution Approach 2:
The patent designs the sensor assembly to perform multiple functions: current measurement, harmonic analysis, communication with external systems, and self-diagnosis. This multi-functional approach allows the single device to replace multiple separate components, providing integrated processing and communication capabilities without proportionally increasing system complexity.
4Reliability
If sensors with sufficient bandwidth for AC and DC monitoring are used, then comprehensive current monitoring is achieved, but adaptability to different wiring configurations is limited
Solution Approach 1:
The patent implements a dynamic sensor assembly that can physically adjust its position and orientation to accommodate different conductor sizes and configurations. The assembly includes movable components and adjustable mounting mechanisms that allow it to adapt to various wiring arrangements while maintaining sufficient bandwidth for monitoring both AC and DC currents reliably.
Solution Approach 2:
The patent divides the sensor assembly into modular sections that can be independently configured for different conductor types and configurations. The segmented design allows individual modules to be arranged and adjusted to match various wiring setups, providing versatility across different applications while maintaining the high bandwidth necessary for reliable AC and DC monitoring.
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 MMS system enables continuous monitoring and rapid response to current anomalies, reducing downtime and enabling accurate detection of issues such as arcs, leakage currents, and harmonic distortions, while allowing for easy maintenance and adaptation to different applications.
Implementation Method 1
a magnetic sensor such as a Hall element
Data Source
AI summary
An MMS sensor assembly includes a U-shaped bottom housing that forms a recess in which is received a conductor whose current is to be sensed and a top housing arranged to be removably latched to the bottom housing. At least one magnetic field sensor is situated within the top housing, such the magnetic field sensor is positioned adjacent the conductor when the top housing is latched to the bottom housing, and is removable from the sensor assembly for repair or replacement. Circuitry connected to the magnetic field sensor includes a data storage device to store correction/compensation tables and/or equations for self-calibration or correction of the sensor.