Alignment Direction Detection in Conductive Composites
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Solution Overview
Problem
Conventional devices fail to quantitatively detect the angle representing fiber alignment direction in electrically conductive composite materials, such as carbon fiber reinforced plastic, due to limitations in measuring magnetic fields.
Innovation Solution
An alignment direction detection device that applies an AC magnetic field using an excitation coil and employs magnetic field sensors to detect inductive magnetic fields, with a control unit processing the sensor outputs to calculate the peak angle representing the fiber alignment direction through band limitation and transformation of voltage distributions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic field sensors are used to detect fiber alignment, then fiber alignment detection is possible, but quantitative angle measurement cannot be obtained
Solution Approach 1:
The patent replaces direct magnetic field measurement with electromagnetic induction measurement. By applying an AC magnetic field and measuring the inductive response voltage, the system transforms the difficult magnetic field measurement into an easier voltage measurement problem, enabling quantitative angle detection.
Solution Approach 2:
The patent changes the measurement parameter from direct magnetic field strength to voltage output from magnetic field sensors. By processing the voltage signals through band limitation and transformation algorithms, the system converts the measured voltage distribution into quantitative alignment angle information.
2Manufacturing precision
If conventional magnetic field measurement is used, then fiber alignment detection is achieved, but the alignment angle cannot be quantitatively obtained
Solution Approach 1:
The patent implements a feedback processing system where the voltage signals from magnetic field sensors are continuously processed through band limitation and transformation algorithms. This feedback loop converts the raw voltage measurements into quantitative alignment angle data, preventing information loss.
Solution Approach 2:
The patent introduces voltage signals as an intermediary between the magnetic field sensors and the alignment angle measurement. The voltage distribution serves as a mediator that can be processed mathematically to extract quantitative angular information, bridging the gap between detection and 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
Enables quantitative detection of the fiber alignment direction in electrically conductive composite materials, improving accuracy and precision in assessing fiber alignment deviations.
Implementation Method 1
an excitation coil to apply an AC magnetic field to the test object
Implementation Method 2
one or more magnetic field sensors arranged at positions maintaining a fixed positional relationship with the excitation coil, each of which detects an inductive magnetic field caused by the AC magnetic field and outputs voltage corresponding to the inductive magnetic field
Data Source
AI summary
An alignment direction detection device includes an excitation coil to apply an AC magnetic field to a test object; one or more magnetic field sensors, each of which detects an inductive magnetic field caused by the AC magnetic field; a conveyance device; and processing circuitry. The processing circuitry performs band limitation on a distribution of the voltage outputted from each magnetic field sensor included in the one or more magnetic field sensors based on a radial direction space frequency corresponding to a size of the magnetic field sensor and a distance between the magnetic field sensor and the test object, transforms the band-limited voltage distribution into an output intensity waveform with respect to a space angle at the radial direction space frequency, and calculates a peak angle that is a peak position of the waveform as an alignment angle representing the alignment direction.