Scintillation Pulse Threshold Timing Using Multiple Transitions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for acquiring the time point when a scintillation pulse passes over a threshold are not accurate due to noise influences, leading to inaccurate time point detection.
Innovation Solution
A method and device that convert the scintillation pulse-threshold relationship into high or low level signals, segment the signals into specific phases, and record the time point by selecting or weighting transitions to achieve accurate time point detection, using a comparator, delay chain, and time code recording units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the first transition time point is captured as the time point when the scintillation pulse passes over the threshold, then the circuit complexity is reduced, but the measurement precision deteriorates due to noise-induced multiple transitions
Solution Approach 1:
The patent segments the pulse signal processing into distinct phases: threshold crossing detection, multiple transition recording, and statistical processing. By dividing the detection process into these segments, the system can capture multiple transition time points (B, C, and intermediate transitions) and process them separately through statistical methods to determine the accurate threshold crossing time, thereby improving measurement precision without excessive circuit complexity
Solution Approach 2:
The patent implements feedback by using the recorded multiple transition time points to calculate statistical parameters (mean, median, standard deviation). This feedback mechanism allows the system to iteratively refine the time point measurement by comparing multiple transitions and selecting the most accurate one based on statistical analysis, thus improving measurement precision while maintaining reasonable circuit complexity
2Measurement precision
If multiple transitions are recorded and statistically processed to determine the accurate time point, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent applies self-service by using the naturally occurring multiple transitions in the pulse signal itself as the measurement basis. Instead of requiring external calibration or additional reference signals, the system utilizes the inherent signal characteristics and their statistical properties to self-determine the accurate threshold crossing time, improving measurement precision without proportionally increasing device complexity
Solution Approach 2:
The patent changes the measurement parameter from a single transition time point to a statistical parameter (mean or median of multiple transition times). This parameter transformation allows the system to improve measurement precision by utilizing the statistical distribution of multiple transitions while managing device complexity through efficient statistical calculation methods
Data Source
AI summary
A method is for acquiring a time point where a glimmering pulse passes over a threshold. The method includes: converting a relationship between a pulse and a threshold into high and low level signals; segmenting output level signals. For a phase where a pulse signal passes over and is higher than a preset threshold and a phase where a pulse signal passes over and is lower than the preset threshold, the two phases respectively include several time points generated by several jumps, and the time point where a pulse passes over a threshold is recorded as any one jump time point or a weighted value of any two or more jump time points. By selecting one jump time point or weighting any two or more jump time points, a more accurate time point where a pulse actually passes over a threshold can be obtained.