Temperature-Compensated Radiation Detector for Stable Energy and Time Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Temperature changes in silicon photo multiplier (SiPM) based radiation detectors, such as those used in PET and PCCT apparatuses, affect the output values of energy and time information due to uneven heat radiation or environmental changes, leading to fluctuations in detection accuracy.
Innovation Solution
Implementing a radiation detector with a temperature-compensated A/D converter and ASIC that adjusts thresholds and voltage settings based on temperature information to stabilize energy and time information output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature compensation is implemented using additional sensors and processing circuitry, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The A/D converter performs self-temperature compensation by using its own internal temperature sensor to detect temperature changes and automatically correcting its conversion results based on the stored temperature characteristics, eliminating the need for external compensation circuits
Solution Approach 2:
Temperature characteristics data stored in memory serves as an intermediary, enabling the A/D converter to translate temperature sensor readings into appropriate correction factors for maintaining measurement accuracy
2Measurement precision
If temperature compensation is implemented using additional sensors and processing circuitry, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
Temperature characteristics are measured and stored in advance during the manufacturing process, allowing the A/D converter to automatically apply pre-determined correction factors during operation without requiring high-precision real-time temperature measurement systems
Solution Approach 2:
The patent creates a digital copy of the temperature characteristics curve during manufacturing and stores it in memory, enabling the system to replicate ideal correction behavior without requiring complex real-time measurement and adjustment mechanisms
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
Minimizes fluctuations in energy and time information by compensating for temperature changes, ensuring stable detection performance even with abrupt temperature variations.
Implementation Method 1
an acquisition unit that acquires temperature information of the A/D converter
Implementation Method 2
an A/D converter that generates digital data by performing A/D conversion on the pulse signal
Implementation Method 3
a sensor unit that outputs a pulse signal based on incidence of radiation
Data Source
AI summary
A radiation detector includes a sensor, an A/D converter, and processing circuitry. The sensor outputs a pulse signal based on incidence of radiation. The A/D converter generates digital data by performing A/D conversion on the pulse signal. The processing circuitry acquires temperature information of the A/D converter and outputs digital data that is compensated based on the temperature information.