Nanosecond on-line detection system for random pulse time sequence

Abstract

The invention relates to a nanosecond detection system based on a random pulse time sequence of an ultra high-speed data acquisition card, and relates to computer application technology and data acquisition and processing technology, in particular to detection and processing technology for the random pulse time sequence. The system performs data acquisition and on-line detection based on a 1GS/s ultra high-speed A/D converting unit and an FPGA high-speed processing unit, and can quickly and accurately detect pulse time in a quick-logic narrow-pulse sequence. The detection for the pulse time is to calibrate the pulse time by pulse peak positions through a particularly designed PeakTDC hysteretic peak value detection algorithm carried on the FPGA, and the time accuracy is 1ns. The system can obtain TDC time data conversion of quick response random events in finite nanosecond random pulse sequences on a time bin axis, and performs the detection on multi-channel pulse signals on line and highly synchronously with high speed and large capacity.

Description

technical field [0001] The invention relates to random signal collection and processing technology, in particular to nanosecond-level detection and processing technology of random pulse time series, belonging to the field of random signal processing and analysis technology. Background technique [0002] Random signals can be divided into two categories from the form of expression: continuous random signals carrying amplitude information and impulsive random signals carrying time information. Among them, impulsive random signals play an irreplaceable role in some random signal processing and analysis applications. For example, in laser signal analysis, radar signal analysis, nuclear material decay analysis, biomedical signal analysis, and noise analysis, the reactivity of the original physical object appears as a random event. This kind of event generally needs to be converted into a pulse signal through the front-end electronic circuit. A pulse represents an event, and a ra...

AI Technical Summary

Problems solved by technology

Although the time detection accuracy of the time-data conversion chips TDC-GP1 and TDC-GP2 of the German ACAM company can reach 125ps, it is a pity that they can only be used for the time interval detection between two pulses, and cannot cope with multiple random pulses. The pulse sequence of , that is, the time information of multiple pulses on the continuous time axis cannot be obtained

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