Induction Coil Sensor Array for Wire Orientation Detection
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Solution Overview
Problem
Conventional wire tracers use a single coil sensor to detect energized wires, which cannot provide information about the orientation or position of the wire, leading to a blind search and confusion due to electromagnetic noise.
Innovation Solution
An array of induction coil sensors is used to monitor the strength of the magnetic field generated by a wire, allowing for the determination of both the location and orientation of the wire through a graphical user interface on a test instrument.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single coil sensor is used to detect energized wires, then the device complexity is reduced, but the measurement precision and information completeness deteriorate because orientation and position information cannot be obtained
Solution Approach 1:
The single coil sensor is segmented into multiple coil sensors arranged in specific geometric patterns (e.g., tetrahedral, planar quadrupole). Each coil sensor detects magnetic field components in different spatial directions, and the combined data from all segments enables three-dimensional localization and orientation determination of the wire.
Solution Approach 2:
The sensor system transitions from single-detection (one coil) to multi-dimensional detection (multiple coils in three-dimensional space). By distributing coil sensors in three-dimensional space with specific geometries, the system captures magnetic field information from multiple spatial dimensions, enabling precise determination of wire position and orientation.
2Device complexity
If a single coil sensor is used, then the device simplicity is maintained, but reliability deteriorates due to electromagnetic noise and blind search requirements
Solution Approach 1:
The system processes magnetic field signals from multiple coil sensors through signal processing algorithms that filter electromagnetic noise and distinguish target wire signals from background interference. The multi-sensor feedback provides redundant information that enhances detection reliability and reduces false positives.
Solution Approach 2:
The sensor system combines multiple coil sensors with different orientations and positions into a composite sensing array. This composite structure provides diverse detection capabilities that complement each other, enabling the system to reliably determine wire characteristics even in noisy electromagnetic environments.
3Measurement precision
If multiple coil sensors are arranged in three-dimensional space, then measurement precision and wire orientation determination are improved, but device complexity increases
Solution Approach 1:
Multiple coil sensors are merged into an integrated sensor array with unified signal processing and control. The coils are arranged in specific geometric configurations (tetrahedral, planar quadrupole, etc.) that provide complete three-dimensional sensing capability while maintaining a compact, manageable structure.
Solution Approach 2:
The multi-coil sensor array performs multiple functions simultaneously: it detects wire position, determines wire orientation, filters electromagnetic noise, and provides redundant measurement capabilities. This multi-functional design justifies the increased complexity by delivering comprehensive wire characterization.
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 array of coil sensors enables accurate location and orientation determination of wires, reducing confusion and improving detection precision by filtering out electromagnetic noise and providing clear graphical indications.
Implementation Method 1
An array of induction coil sensors is used to monitor, from multiple locations, the strength of a magnetic field generated by a wire to be traced
Data Source
Figure 1A~1B
Figure 2A
Figure 2B~2C
AI summary
An array of induction coil sensors is used to monitor, from multiple locations, the strength of a magnetic field generated by a wire to be traced. The magnetic field strength data is used to determine the location and orientation of the wire. In one embodiment, the sensor array is incorporated into a test instrument. The screen of the test instrument provides a graphical user interface that shows the orientation of the wire and indicates the location of the wire relative to the instrument.