FPGA-based high precision time interval measurement method and system
A technology of time interval measurement and time interval, which is applied in the direction of electrical unknown time interval measurement, devices and instruments for measuring time interval, etc. It can solve the problems of narrow measurement range and difficulty in meeting engineering needs, achieve high measurement accuracy and reduce flipping noise and the effect on the probability of occurrence of metastable phenomena
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[0031] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention, and not used to limit the scope of the present invention.
[0032] This embodiment provides an FPGA-based high-precision time interval measurement method, and its work flow chart is as follows figure 1 As shown, the method includes the following implementation steps: a coarse measurement of the time interval between two pulses using the pulse filling counting method to obtain the coarse measurement result of the time interval; based on the FPGA tap delay chain, the phase difference of less than one clock cycle is measured Fine measurement to obtain a fine measurement result of the time interval; and determine the final measurement result of the time interval according to the rough measurement result and the fine measurement result.
[0033] In FPGA, the transmission between basic units such...
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