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Frequency response measurement system and method based on synchronous discrete Fourier transform

A discrete Fourier, frequency response technology, applied in special data processing applications, spectrum analysis/Fourier analysis, greenhouse gas reduction, etc., can solve the problems of low measurement efficiency and complex system structure, and achieve high efficiency, system simple structure

Active Publication Date: 2022-02-08
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Benefits of technology

This invention describes an improved device called this new type that can measure both time-varying signals like sound waves or pressure changes over different frequencies accurately with less complicated equipment than existing methods such as wavelets.

Problems solved by technology

This patented problem addressed in this patents relates to measuring the characteristics (amplitude/phase) of an electrical circuit's frequency responses due to external influences or changes caused during its operation. Existing methods for analyzing these signals have limitations with regards complexity and reduced accuracy compared to more efficient techniques like time domain reflectometry.

Method used

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  • Frequency response measurement system and method based on synchronous discrete Fourier transform
  • Frequency response measurement system and method based on synchronous discrete Fourier transform
  • Frequency response measurement system and method based on synchronous discrete Fourier transform

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Embodiment Construction

[0029] In order to better understand the purpose, structure and function of the present invention, a frequency response measurement system and method based on synchronous discrete Fourier transform of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] Such as figure 2 As shown, a frequency response measurement system based on synchronous discrete Fourier transform includes:

[0031] A synchronous waveform generator, the input is the control signal Ctrl0 and the synchronous clock signal CLK0 output by the calculation control unit, and the output measurement signal x(t) is connected to the linear system to be measured;

[0032] A linear system to be tested, the input is the output x(t) of the synchronous waveform generator, and the output m(t) is connected to the signal conditioning circuit;

[0033] A signal conditioning circuit, the input is the output m(t) of the linear system to be tested and the control ...

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Abstract

The invention belongs to the technical field of frequency response measurement, and discloses a frequency response measurement system and method based on synchronous discrete Fourier transform. The system includes a synchronous waveform generator, a to-be-measured linear system, a signal conditioning circuit, a synchronous analog-to-digital converter and a calculation control unit. The characteristic that a discrete Fourier transform result has a real part and an imaginary part at the same time is utilized, a superposition theorem is utilized, a superposition signal of a plurality of sine sub-signals is input, and the amplitude-frequency response and the phase-frequency response of the to-be-measured linear system on a plurality of frequency points are obtained at a time through system synchronization and synchronous discrete Fourier transform. The measurement system and method provided by the invention have the advantages of simple measurement system and high measurement efficiency.

Description

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Claims

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Application Information

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Owner ZHEJIANG UNIV
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