Radiation Imaging Device Wireless Communication Shielding
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Solution Overview
Problem
Radiation imaging apparatuses with resin housings face challenges in performing wireless communication due to electromagnetic noise shielding, which hinders communication with external units.
Innovation Solution
The apparatus employs a non-metallic exterior with conductive components to shield electromagnetic interference while allowing wireless communication by positioning the wireless communication unit between the conductor and the exterior, creating a radio transmission window and using conductive films or coatings to minimize electromagnetic wave interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conductor is used to shield the semiconductor sensor from external electromagnetic waves, then electromagnetic noise shielding is improved, but wireless communication is hindered due to radio wave shielding
Solution Approach 1:
The housing is divided into two distinct parts: a first housing made of non-metallic material that allows radio wave transmission, and a second housing made of conductive material that provides electromagnetic shielding. This segmentation enables each part to fulfill its specific function without interfering with the other, resolving the contradiction between communication and noise shielding.
Solution Approach 2:
Different parts of the housing are assigned different material properties: the first housing (communication area) uses non-metallic material with radio wave transmission properties, while the second housing (sensor area) uses conductive material with electromagnetic shielding properties. This local differentiation of material quality allows simultaneous achievement of communication and noise protection.
2Ease of manufacture
If a resin housing is used to reduce cost, then manufacturing cost is reduced, but electromagnetic noise shielding capability deteriorates
Solution Approach 1:
The housing is segmented into a cost-effective non-metallic first housing and a conductive second housing for shielding. This allows the majority of the housing to use inexpensive resin material while only the critical sensor area uses conductive material, achieving noise shielding without proportionally increasing cost.
Solution Approach 2:
The housing system combines two different material types (non-metallic and conductive materials) into a composite structure. This composite approach allows the device to benefit from both the cost and ease of manufacturing of resin materials and the electromagnetic shielding properties of conductive materials.
3Object-affected harmful factors
If a conductive layer is applied to cover the circuit board for noise protection, then electromagnetic interference is reduced, but radio wave transmission for communication is blocked
Solution Approach 1:
The housing structure is segmented to provide electromagnetic shielding in specific areas (second housing covering the sensor) while maintaining radio wave transmission in other areas (first housing). This spatial segmentation allows simultaneous protection from interference and enablement of communication.
Solution Approach 2:
The first housing made of non-metallic material acts as an intermediary structure that allows radio waves to pass through while the second conductive housing provides shielding. This intermediary non-metallic housing enables the coexistence of communication and shielding functions.
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 stable wireless communication with external units while reducing electromagnetic noise artifacts in radiation images, maintaining the cost-effectiveness of resin housings.
Implementation Method 1
a conductive member 13 having an opening 13a and arranged between the wireless communication unit 10 and the semiconductor sensor 4
Implementation Method 2
a wireless communication unit 10 arranged between the conductive member 13 and the exterior
Data Source
Figure 1A~1B
Figure 2~3
Figure 4~5
AI summary
A radiation imaging apparatus comprises a radiation detection unit configured to convert received radiation into an electrical signal, a communication unit configured to perform wireless communication with an external device, and an exterior at least partially formed by a non-conductive member and configured to contain the radiation detection unit and the communication unit, wherein a conductor is formed so as to cover the radiation detection unit, and the communication unit is arranged between the exterior and the conductor.