Pipelined Spectrographic Analyzer for High-Flux Gamma Ray Detection
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Solution Overview
Problem
Spectrographic analyzers face challenges in accurately measuring the energy of individual gamma rays in high-flux radiation fields due to overlapping pulses, which requires sensitive detectors and high-powered computer processing that often cannot keep up with real-time demands.
Innovation Solution
A spectrographic analyzer system utilizing pipelined hardware with a data interface, edge detection filter, delay buffer, integrator, and histogram buffer, which duplicates digital amplitude samples, detects pulse edges, integrates pulse areas, and maintains histogram bins to suppress noise and overlap detection, reducing detector sensitivity and processing burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-powered computer processing is dedicated to the spectrographic analyzer, then measurement accuracy is improved, but the processing speed cannot keep up with real-time demands
Solution Approach 1:
The patent segments the signal processing task by separating pulse detection and integration into distinct hardware modules (edge detection filter, delay buffer, integrator) that operate independently and in parallel, allowing each module to process specific portions of the signal without requiring sequential processing by a single computer
Solution Approach 2:
The patent introduces dedicated hardware intermediaries (FPGA or ASIC) between the detector and the general-purpose computer. These intermediaries perform the time-critical pulse detection and integration functions, acting as a buffer that protects the computer from real-time processing demands while maintaining measurement accuracy
2Measurement precision
If sensitive detectors are used to convert gamma rays into extremely short pulses, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent creates a digital copy of the analog pulse signal through the analog-to-digital converter, allowing the pulse to be processed in the digital domain where sophisticated algorithms can be applied without requiring equally sophisticated analog processing circuitry. This copying approach simplifies the overall device architecture while maintaining measurement precision
Solution Approach 2:
The patent replaces complex analog pulse processing mechanisms with digital signal processing techniques. Instead of using complex analog circuits to analyze pulse shapes and energies, the system uses software algorithms running on FPGAs or ASICs to perform the same functions, thereby reducing hardware complexity while maintaining or improving measurement capability
Data Source
AI summary
A spectrographic analyzer of pulses within a signal includes a data interface, an edge detection filter, a delay buffer, an integrator, and a histogram buffer. The data interface duplicates a stream of digital amplitude samples for the signal into a first and second stream. The edge detection filter determines the beginning and end of each pulse within the first stream of the digital amplitude samples. The delay buffer delays the second stream by a duration sufficient for the edge detection filter to determine both the beginning and end of each pulse. The integrator sums a respective amplitude total for each pulse. The respective amplitude total sums the digital amplitude samples between the beginning and end of each pulse in the second stream as delayed by the delay buffer. The histogram buffer maintains bins and increments a respective one of the bins encompassing the respective amplitude total for each pulse.