Radiation Imaging Detector Wiring for Electromagnetic Noise Isolation
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Solution Overview
Problem
Existing radiation imaging apparatuses experience image unevenness due to electromagnetic interference and noise from ground wiring and antenna reflections, leading to false radiation detection.
Innovation Solution
The apparatus is designed with GND wiring positioned farther from the radiation detector and irradiation detecting sensor wiring positioned away from the rear surface to minimize electromagnetic interference, using a case structure that includes a supporter and electric wiring configuration to reduce noise influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If GND wiring is placed closer to the radiation detector for easier wiring, then wiring complexity is reduced, but electromagnetic interference increases causing image unevenness
Solution Approach 1:
The patent applies dimensional separation by positioning GND wiring and signal wiring at different positions in the thickness direction (Z-axis) rather than only in the planar direction. This vertical stratification creates electromagnetic isolation between high-current GND lines and sensitive signal lines, reducing interference while maintaining wiring simplicity.
Solution Approach 2:
The patent introduces a shielding structure as an intermediary element between the GND wiring and the radiation detector. This shielding layer acts as a mediator that blocks electromagnetic fields from reaching the detector, allowing GND wiring to be positioned closer without causing image unevenness.
2Volume of moving object
If antenna wiring is placed closer to the irradiation detecting sensor for compact design, then device size is reduced, but noise from electromagnetic wave reflection increases causing false detection
Solution Approach 1:
The patent positions the antenna and irradiation detecting sensor at different locations in the thickness direction, creating vertical separation. This dimensional arrangement allows compact planar design while maintaining sufficient electromagnetic isolation to prevent noise coupling and false radiation detection.
Solution Approach 2:
The patent extracts the antenna system from immediate proximity to the irradiation detecting sensor by positioning it at a separated location. This extraction removes the source of electromagnetic reflection noise from the critical detection zone, preventing false positive readings while preserving compact overall device dimensions.
3Manufacturing precision
If multiple wiring layers are used to reduce electromagnetic interference, then image quality improves, but device complexity increases
Solution Approach 1:
The patent utilizes the thickness direction as an additional dimension for wiring arrangement, creating vertically stacked wiring layers. This approach achieves electromagnetic isolation equivalent to complex multi-layer plans but with simpler implementation through vertical positioning, improving image quality without excessive complexity.
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 configuration reduces image unevenness and prevents false radiation detection by minimizing electromagnetic interference and noise, enhancing image quality and reliability.
Implementation Method 1
A large current may flow in GND (ground) wiring connecting the rechargeable battery in the FPD to a frame ground. In such case, electromagnetic fields are generated in the surrounding area, and the electromagnetic field may have an influence on the radiation detector.
Implementation Method 2
when wireless communication is performed with the antenna, electromagnetic waves from the antenna wiring may reflect on a case and provide an influence as noise on the wiring connecting the irradiation detecting sensor with the circuit substrate.
Data Source
AI summary
A radiation imaging apparatus includes the following, a radiation detector that detects radiation; an electronic circuit; a plurality of electric wiring that connects the electronic circuit; a supporter that supports the radiation detector; and a case that includes a front surface portion in which radiation is incident and a rear surface portion facing the front surface portion with the radiation detector in between. The case stores the radiation detector, the electronic circuit, the plurality of electric wiring and the supporter. The plurality of electric wiring is positioned between the supporter and the rear surface portion, and at different positions in a thickness direction of the radiation imaging apparatus. The plurality of electric wiring include GND wiring that is used for a power supply. The GND wiring is positioned in a position farther from the radiation detector than other wiring in the thickness direction.