A pulse arrival time measurement system and method

By converting the pulse signal into a digital signal and dividing it into three channels, using the DA unit, the FPGA unit and the TDC unit to measure the CLK time, the first pulse time and the second pulse time, the problem that the accuracy of the measurement pulse arrival time of the mid- and low-end FPGA measurement pulse is difficult to reach within 1 ns, and high-precision and low-cost measurement effects are achieved.

CN119471586BActive Publication Date: 2025-03-25ANHUI JINGHUAI JIANRUI ELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202510075073.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-17
Publication Date
2025-03-25
Estimated Expiration
2045-01-17

AI Technical Summary

Technical Problem

The accuracy of existing mid- and low-end FPGA measurement pulse arrival time is difficult to reach within 1 ns.

Method used

By converting the pulse signal into a digital signal and dividing it into three channels, the CLK time, the first pulse time and the second pulse time are measured through the DA unit, the FPGA unit and the TDC unit respectively, and the pulse arrival time with an accuracy of less than 1 ns is calculated.

Benefits of technology

It achieves the purpose of measuring the arrival time of the pulse with high accuracy while meeting the low cost, with the accuracy reaching less than 1 ns, meeting the requirements of high accuracy and low cost.

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Abstract

The invention relates to the field of pulse arrival time measurement, and in particular to a pulse arrival time measurement system and method. A digital signal converted from a pulse signal is divided into three paths, and the CLK time, the first pulse time and the second pulse time are measured respectively through a CLK unit, an FPGA unit and a TDC unit, so as to calculate a more accurate pulse arrival time with an accuracy within 1 ns. A DA unit is used to judge the rising edge and the falling edge, so as to accurately calculate the accurate arrival time of each rising edge and the falling edge in combination with the calculated pulse arrival time. A TDC unit is used to measure the pulse arrival time with high accuracy, and an FPGA unit is used to complement each other to complete the measurement of the pulse arrival time of various pulse widths. The invention solves the problem that the accuracy of the existing low-end and mid-end FPGA in measuring the pulse arrival time is difficult to reach within 1 ns.
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