X-ray Detection System Power Management via Comparator Trigger
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Solution Overview
Problem
Existing X-ray flat panel detectors consume high power due to continuous operation of the analog to digital convertor to detect X-ray radiation, which is inefficient and not suitable for portable devices.
Innovation Solution
Incorporating a comparator device to monitor X-ray radiation and only activate the analog to digital convertor from sleep mode to operating mode when radiation is detected, using a charge accumulation device, switch device, and a low-power comparator to manage current flow and signal generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the analog to digital convertor operates continuously to detect X-ray radiation, then the detection reliability is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the operating state of the analog to digital convertor changeable between sleep mode and operating mode based on real-time detection needs. The system dynamically adjusts the convertor's state rather than maintaining a fixed continuous operation, resolving the contradiction between reliable detection and power consumption.
Solution Approach 2:
The patent introduces a comparator device as an intermediary component that monitors the voltage signal and triggers the analog to digital convertor only when X-ray radiation is detected. This intermediary mechanism enables reliable detection while avoiding continuous high-power operation, as the convertor remains in low-power sleep mode until activated by the comparator.
2Use of energy by moving object
If the analog to digital convertor is activated only when needed, then the power consumption is reduced, but the response time may increase
Solution Approach 1:
The patent applies preliminary action by having the comparator device continuously monitor the voltage signal in a low-power state and prepare to trigger the analog to digital convertor immediately when X-ray radiation is detected. This pre-positioning of the monitoring mechanism ensures rapid response while maintaining power savings, as the system is ready to activate the convertor without delay when needed.
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 approach significantly reduces power consumption by minimizing continuous high-power operation of the analog to digital convertor, making it suitable for portable X-ray FPD products.
Implementation Method 1
a charge accumulation device to receive the current produced by the at least one pixel and convert the current to a voltage signal
Implementation Method 2
a comparator device to compare the voltage signal and generate a first indication signal or a second indication signal
Implementation Method 3
a switch device to connect the input terminal to a first output terminal or a second output terminal according to the first indication signal or the second indication signal
Data Source
AI summary
An X-ray image detection system includes a charge accumulation device, a switch device, a comparator device and an analog to digital converter. The charge accumulation device receives current produced by a pixel and converts the current to a voltage signal. The switch device has an input terminal, a first output terminal, and a second output terminal. The input terminal is connected to the charge accumulation device to receive the voltage signal. The comparator device is connected to the first output terminal for generating first or second indication signal according to the voltage signal. The analog to digital converter is connected to the second terminal. When the first indication signal is generated, the input terminal of the switch device is connected to the first output terminal. When the second indication signal is generated, the input terminal of the switch device is connected to the second output terminal.