Flexible Multilayer Cover Sheet for Wireless DR Detector Impact Protection
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Solution Overview
Problem
Portable wireless digital radiography detectors are susceptible to damage from impact and mechanical stress due to their portability and versatility, which complicates the need for effective protection without compromising their usability or imaging performance.
Innovation Solution
A digital radiography detector design featuring a flexible multilayer cover sheet made of thermoplastic polyurethane, polyethylene terephthalate, and adhesive silicone, attached to the exterior surface of the glass panel substrate, which absorbs impact forces and is encased within a housing to provide protection without affecting the detector's performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional approaches for buffering the internal glass panel from impact are applied, then impact protection is improved, but portability and dimensional profile are compromised
Solution Approach 1:
A flexible cover sheet comprising multiple layers including a rigid outer layer, a compliant intermediate layer, and a soft inner layer is applied to the exterior surface of the glass panel. This flexible multilayer structure provides impact absorption and cushioning while maintaining a thin profile that does not compromise the portability of the wireless DR detector.
Solution Approach 2:
The cover sheet utilizes a composite structure with three distinct layers: a rigid outer layer (such as polycarbonate or acrylic) for structural strength, a compliant intermediate layer (such as thermoplastic elastomer or silicone) for shock absorption, and a soft inner layer (such as foam or gel) for cushioning. This composite material approach provides comprehensive impact protection while keeping the overall thickness minimal to preserve portability.
2Strength
If conventional approaches for buffering the internal glass panel from impact are applied, then impact protection is improved, but dimensional profile is compromised
Solution Approach 1:
The flexible cover sheet is designed as a thin film structure that can be applied directly to the glass panel surface without adding significant thickness. The multilayer construction provides impact protection within a compact dimensional envelope, ensuring the detector maintains a sleek profile suitable for portable applications.
Solution Approach 2:
The composite cover sheet structure achieves high impact protection in a thin configuration by optimizing the thickness and material properties of each layer. The rigid outer layer provides structural integrity, the compliant intermediate layer absorbs shock, and the soft inner layer cushions the glass panel, all within a minimal overall thickness that preserves the detector's dimensional profile.
3Strength
If a protective covering is applied to the glass panel, then impact protection is improved, but imaging performance may be affected
Solution Approach 1:
The flexible cover sheet is designed with optical clarity and appropriate transparency to allow x-ray radiation to pass through to the photosensitive circuitry on the glass panel. The thin film structure minimizes attenuation and scattering of x-rays, ensuring that imaging performance and measurement precision are not degraded while still providing necessary impact protection.
Solution Approach 2:
The composite cover sheet materials are selected for their x-ray transparency and optical properties. The rigid outer layer, compliant intermediate layer, and soft inner layer are all chosen to be sufficiently transparent to x-ray radiation, allowing the photosensitive circuitry to accurately detect and image the subject while the multilayer structure provides comprehensive impact protection.
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 enhances the detector's resilience to impact without increasing weight or dimensions, maintaining imaging quality and usability across various environments.
Implementation Method 1
a flexible multilayer cover sheet that is configured to absorb various impact forces against the detector
Implementation Method 2
The multilayer cover sheet is configured to absorb impact forces and cushion the glass panel from breaking or cracking
Data Source
AI summary
A digital radiography detector has a substrate that is enclosed by a housing and that has, formed on a first surface, photosensitive circuitry that provides image data of a subject in response to ionizing radiation passed through the subject, wherein a second surface on the exterior of the detector has a multilayer flexible cover sheet configured to absorb impact force against the detector.