Flexible Electromagnetic Pressure Detector for Curved Surfaces
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Solution Overview
Problem
Pressure distribution detectors using electromagnetic coupling face challenges when placed on curved or irregular surfaces, as misalignment of drive and detection coils affects detection sensitivity and accuracy.
Innovation Solution
A pressure distribution detector design featuring looped drive and detection wires with a spacer maintaining constant distance, variable electromagnetic coupling, and flexible components to adapt to arbitrary surface shapes, ensuring consistent detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pressure distribution detector is placed on a curved or irregular surface, then the detector can be applied to various surface shapes, but misalignment of drive and detection coils occurs, adversely affecting detection sensitivity and accuracy
Solution Approach 1:
The patent introduces a flexible substrate that allows the detector to dynamically adapt its shape to match the surface it is placed on. This flexibility enables the detector to maintain proper alignment between drive and detection coils even when placed on curved or irregular surfaces, thereby preserving detection accuracy while improving adaptability to various surface shapes.
Solution Approach 2:
The patent changes the physical state of the substrate from rigid to flexible, allowing it to deform and conform to different surface geometries. This parameter change enables the detector to maintain constant distance and proper alignment between coils regardless of the underlying surface shape, resolving the contradiction between adaptability and measurement precision.
2Area of stationary object
If the detection surface size is increased, then the detection area is expanded, but the impedance increases, making the detector susceptible to noise
Solution Approach 1:
The patent replaces traditional high-impedance detection methods with a low-impedance electromagnetic coupling system using drive and detection coils. This substitution allows for larger detection surfaces while maintaining low impedance characteristics, thereby expanding detection area without compromising noise tolerance or reliability.
3Measurement precision
If a differential transformer system is used, then pressure and displacement can be measured, but the core and differential coil have certain thickness, making it difficult to form a thin sheet-like shape
Solution Approach 1:
The patent substitutes the differential transformer system with an electromagnetic coupling system using thin coil structures. This replacement eliminates the need for thick cores and complex transformer structures, enabling the detector to be formed as a thin sheet-like shape while maintaining pressure and displacement measurement capabilities.
Solution Approach 2:
The patent employs thin coil structures and flexible substrate materials to create a sheet-like detector configuration. The coils are wound on a flexible substrate that can be formed into thin, conformable shapes, eliminating the thickness issues inherent in traditional differential transformer designs while preserving measurement functionality.
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 solution allows for larger detection surfaces with high noise tolerance and accurate pressure distribution measurement on surfaces of any shape, enhancing the detector's versatility and application range.
Implementation Method 1
a plurality of drive wires 100 arranged in a looped pattern on a substrate; a plurality of detection wires 200 arranged in a looped pattern so as to be electromagnetically coupled to each of the plurality of drive wires
Data Source
AI summary
A pressure distribution detector is less influence by installation environment, that is, a pressure distribution detector that detection sensitivity or detection accuracy is less adversely affected even if the device is fitted not only to a flat surface but also a surface having an arbitrary shape such as a curved surface. The pressure distribution detector comprises a plurality of drive coils (1) provided on a substrate, a plurality of detection coils (2) electromagnetically coupled with the plurality of drive coils in pairs respectively, and a spacer (4) for keeping a constant distance between the plurality of drive coils and the plurality of detection coils, respectively. In order to vary the degree of electromagnetic coupling between the drive coil and the detection coil, a variable electromagnetic coupling (3) formed of a conductor or a magnetic body is provided movably adjacent to the drive coil and/or the detection coil. The drive coil is driven through a drive circuit and a change in the degree of electromagnetic coupling between the drive coil and the detection coil is detected by a detection circuit from the detection coil.