Method for identifying full-digital peak value arrival time

Abstract

The invention relates to a method for identifying the full-digital peak value arrival time. The method comprises the following steps: comparing signals to be detected with a certain preset threshold value signal by the same quantity of high-speed comparators as that of the signals to be detected, if the signals are greater than the preset threshold value, outputting single quotation mark 1 single quotation mark, otherwise, outputting single quotation mark 0 single quotation mark, and converting the signals to be detected into digital pulse signals, wherein the signals to be detected are one or multiple paths of analog pulse signals which have the characteristics of certain symmetry and are provided with rising edges and falling edges; measuring a rising edge moment and a falling edge moment when the digital pulse signals pass through by an FPGA (field programmable gate array) chip; calculating the peak value arrival time of the signals to be detected according to the rising edge moment and the falling edge moment. According to the method, a hardware circuit is simple and is easy to implement; meanwhile, multi-channel expansion is easily carried out; meanwhile, compared with existing technologies for constant fraction timing, peak value detection and the like, the method disclosed by the invention has the advantages that the hardware circuit is greatly simplified, and the identification precision is similar; the method is higher in practicability and feasibility in the field of multi-channel signal processing.

Description

technical field [0001] The invention relates to the field of identification of the arrival time of pulse signals, in particular to a method for identifying the arrival time of an all-digital peak value. Background technique [0002] In the fields of laser ranging and high-energy physics, applications such as high-resolution ranging and particle discrimination require accurate measurement of the arrival time of pulse signals. At present, the common arrival time discrimination methods include edge detection, peak detection, constant ratio timing detection and so on. The edge detection method is easy to implement and low in cost, but it is greatly affected by the signal echo strength. With the change of the signal amplitude, the arrival time will wander in a large range, and the range of change is approximately proportional to the width of the rising edge of the pulse signal. . Peak detection obtains high-resolution signal waveforms through high-speed sampling, and determines...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of insufficient detection accuracy or complex circuit structure and difficult expansion in the existing technology, the present invention provides a fully digital peak arrival time identification method

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