Multi-Core Current Detection via Magnetic Sensor Array
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Solution Overview
Problem
Current detection devices for multi-core conducting wires require disassembly to measure individual core wires, causing damage and preventing real-time detection during facility operation.
Innovation Solution
A current detection device with a carrier and multiple magnetic sensors surrounding the conducting wire, using a current decoupling model to calculate each core wire's current value from measured magnetic field values without disassembly, allowing real-time monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current transformers or shunt resistors are used to detect current, then current measurement is achieved, but the device can only measure single core wires and requires disassembly of multi-core conducting wires
Solution Approach 1:
The patent divides the measurement function into multiple magnetic sensors arranged around the conducting wire, with each sensor measuring the magnetic field at its specific position. The processor then segments the total measurement into individual core wire currents through mathematical calculation, enabling non-invasive measurement of multi-core wires without disassembly.
Solution Approach 2:
The patent creates a universal measurement device that can measure both single core wires and multi-core conducting wires without requiring different measurement methods or disassembly. The magnetic sensor array and current decoupling model provide a unified approach that adapts to various conducting wire configurations.
2Measurement precision
If conducting wire is disassembled to expose core wires for measurement, then individual core wire current can be measured, but the conducting wire is damaged and real-time detection during operation is prevented
Solution Approach 1:
The patent extracts the measurement function from the physical contact with core wires. Instead of requiring direct contact with individual core wires (which would require disassembly), the system measures the external magnetic field generated by the currents and mathematically extracts the individual core wire current values, preserving the conducting wire's integrity.
Solution Approach 2:
The patent introduces the magnetic field as an intermediary between the current-carrying core wires and the measurement system. The magnetic sensors detect the magnetic field produced by the currents, and the processor uses this intermediate measurement to calculate individual core wire currents without direct contact, thus avoiding damage to the conducting wire.
3Ease of operation
If magnetic sensors are arranged to surround the conducting wire, then non-invasive measurement is achieved, but the relative positions and angles between wire and carrier must be considered
Solution Approach 1:
The patent implements a dynamic measurement approach where the carrier with magnetic sensors can rotate around the conducting wire. The system dynamically adjusts the measurement based on the relative position, using the rotation angle as an additional parameter in the calculation to determine individual core wire currents from measurements taken at different angular positions.
Solution Approach 2:
The patent adds the angular dimension to the measurement system by arranging magnetic sensors in a circular pattern around the conducting wire and utilizing rotation. This transforms a simple linear measurement problem into a multi-dimensional measurement that captures magnetic field variations from different angular positions, enabling resolution of individual core wire currents.
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 non-invasive, real-time current measurement of each core wire in a multi-core conducting wire, avoiding damage and eliminating the need to consider relative positions or angles between the wire and the carrier.
Implementation Method 1
measuring the alternating magnetic field of the multi-core conducting wire when the multi-core conducting wire is powered on
Data Source
AI summary
A current detection device applied to a multi-core conducting wire comprises a carrier, magnetic sensors and a processor wherein the processor is connected to the magnetic sensors. The carrier has an accommodating channel for accommodating the multi-core conducting wire. The magnetic sensors are disposed at the carrier, surround the accommodating channel, equally share 360 degree of the peripheral of the accommodating channel, and are configured to measure an alternating magnetic field of the multi-core conducting wire to respectively obtain magnetic field measured values, wherein each of the magnetic sensors corresponds to a respective one of the magnetic field measured values. The processor stores a current decoupling model, and is configured to obtain the magnetic field measured values from the magnetic sensors and to calculate a current value of each core wire of the multi-core conducting wire according to the current decoupling model and the magnetic field measured values.