Flexible Pixel Array Using Conductive Shape Memory Material
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Solution Overview
Problem
Existing radiography systems face challenges in effectively imaging non-planar objects due to deformation from thermal expansion and the need for higher radiation doses, which can be exacerbated by the rigidity of detection apparatuses.
Innovation Solution
A flexible radiography apparatus featuring a conductive shape memory material coupled to a substrate with radiation-detecting pixels, where the shape memory material changes shape in response to an applied current, allowing the substrate and pixels to bend closer to the object, and pressure sensors adjust the imaging process accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid detection apparatus is used, then structural stability is maintained, but the ability to conform to non-planar objects is reduced
Solution Approach 1:
The detection apparatus transitions from a static rigid structure to a dynamic flexible structure that can change its shape. The flexible substrate and shape memory alloy elements enable the apparatus to adapt its configuration dynamically, allowing it to conform to non-planar objects while maintaining structural integrity through controlled deformation rather than rigid fixation.
Solution Approach 2:
The patent employs a flexible substrate as the base structure for the detection apparatus, replacing traditional rigid support structures. This flexible substrate allows the apparatus to bend and conform to curved surfaces of non-planar objects, while the integrated shape memory alloy elements provide structural reinforcement when needed, resolving the contradiction between flexibility and stability.
2Measurement precision
If the detection apparatus is positioned closer to non-planar objects, then image quality improves, but the required radiation dose increases
Solution Approach 1:
The flexible detection apparatus can dynamically adjust its position and shape to optimize proximity to non-planar objects without requiring excessive radiation doses. By conforming to the object surface, the apparatus achieves better image quality at reduced distances, and the shape memory alloy elements enable precise positioning control that minimizes the radiation dose needed while maintaining measurement precision.
3Device complexity
If thermal expansion is not compensated, then device simplicity is maintained, but deformation of the radiation conversion panel occurs
Solution Approach 1:
The shape memory alloy elements respond to temperature changes by altering their physical state and dimensions. When temperature increases cause thermal expansion, the shape memory alloy elements undergo phase transitions or dimensional changes that counteract the expansion, maintaining the flatness of the radiation conversion panel. This passive compensation mechanism adds minimal complexity while effectively preventing deformation.
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
This solution improves image quality and reduces radiation exposure by enabling closer pixel positioning to non-planar objects, potentially lowering the required radiation dose and enhancing imaging efficiency.
Implementation Method 1
drive circuitry configured to apply a current to the conductive shape memory material in order to change a shape of the conductive shape memory material and the flexible substrate
Implementation Method 2
conductive shape memory material coupled to the flexible substrate; drive circuitry configured to apply a current to the conductive shape memory material in order to change a shape of the conductive shape memory material
Data Source
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AI summary
An apparatus, method and a computer program are provided. The apparatus comprises: an array of pixels, configured to detect radiation, provided on a flexible substrate; a conductive shape memory material coupled to the flexible substrate; and drive circuitry configured to apply a current to the conductive shape memory material in order to change a shape of the conductive shape memory material and the flexible substrate.