X-Ray Detection Camera Reset Timing for Polarization Suppression
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Solution Overview
Problem
Existing radiation detection apparatuses fail to reliably detect radiation transmitted through a target object due to polarization phenomena occurring in the detection element when the bias voltage application is stopped without considering external conditions, potentially missing radiation detection opportunities.
Innovation Solution
A radiation detection apparatus with a control unit that determines whether a reset operation is executable based on signals from a target object sensor, allowing voltage control to be performed such that electric charge is collected only when the target object is present, thereby suppressing polarization and enhancing detection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the bias voltage is stopped to eliminate polarization in the detection element, then the polarization phenomenon is suppressed, but the radiation detection capability deteriorates because the detection element cannot detect radiation transmitted through the target object
Solution Approach 1:
The control unit applies the bias voltage in advance before the target object enters the irradiation region, and stops the bias voltage application after the target object has passed through. This preliminary action ensures that the detection element is in a ready state to detect radiation when the target object is present, while preventing polarization by stopping voltage application during non-detection periods
Solution Approach 2:
The bias voltage application is made dynamic rather than static. The control unit adjusts the voltage application state based on the presence or absence of the target object in the irradiation region, switching between voltage application and cessation to balance polarization prevention with detection capability maintenance
2Object-affected harmful factors
If the reset operation is executed frequently to suppress polarization, then the polarization phenomenon is eliminated, but the detection element cannot collect electric charge during the reset operation, reducing detection accuracy
Solution Approach 1:
The control unit executes reset operations periodically based on the passage of the target object through the irradiation region. The reset operation is performed at specific intervals when the target object is not present, allowing the detection element to recover from polarization without interfering with continuous radiation detection during the target object's passage
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 apparatus effectively suppresses polarization in the detection element and reliably detects radiation by executing reset operations at optimal times, ensuring consistent and accurate radiation imaging.
Implementation Method 1
a detection element that directly converts incident radiation into an electric charge
Implementation Method 2
a sensor that senses a target object irradiated with the radiation
Data Source
AI summary
An X-ray detection camera determines whether or not a reset operation of performing voltage control on a detection unit such that an electric charge is not collected by the detection unit is executable based on a signal from a target object sensor that senses an inspection target object irradiated with an X-ray, and executes the reset operation in a case where the reset operation is executable.