Method for extracting frequency components in dynamic distorted sinusoidal signals and device for implementing method

A frequency component and extraction method technology, applied in the field of frequency component extraction method and its implementation device in dynamic sinusoidal distortion signal, can solve the problems of lower analysis accuracy, spectrum leakage, and no ideal and mature solution, etc., to achieve suppression of spectrum Effects of leakage, improved accuracy and stability, simple and feasible device

Inactive Publication Date: 2013-03-27
HUNAN UNIV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The FFT-based method is popular because of its simple implementation, but it is difficult to apply to the frequency component extraction of dynamic sinusoidal distortion signals. The main reasons are as follows: 1) When distortion occurs, the sinusoidal fundamental frequency often fluctuates, and strict synchronization Sampling is difficult to achieve, and the spectral leakage and fence effect caused by a

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for extracting frequency components in dynamic distorted sinusoidal signals and device for implementing method
  • Method for extracting frequency components in dynamic distorted sinusoidal signals and device for implementing method
  • Method for extracting frequency components in dynamic distorted sinusoidal signals and device for implementing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] The present invention realizes the device structure of the extraction method of the frequency component in the dynamic sinusoidal distortion signal as follows figure 1 shown.

[0027] like figure 1 As shown, the data acquisition card uses NI USB-6210 from National Instruments. The sampling frequency of NI USB-6210 is set to 250k Hz, and the number of data conversion bits is 16. NI USB-6210 contains 16 signal input channels. Select Any one of the input channels is connected to the sinusoidal distortion signal, and the NI USB-6210 is connected to the computer through USB. In this embodiment, the signal generator of Agilent Corporation of the United States is used to provide the sinusoidal distortion signal to be analyzed by Agilent 33120A, and the output of Agilent 33120A is connected to the input terminal of NI USB-6210.

[0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for extracting frequency components in dynamic distorted sinusoidal signals and a device for implementing the method. The method comprises weighting discrete distorted sinusoidal signals through a triangular Haning time domain convolution window, subjecting the weighted signals to discrete Fourier transform to obtain discrete spectra, finding spectral lines with a first, second and third largest amplitude values in the discrete spectra, calculating leakage weights on left and right sides of peak spectral lines of the three found spectral lines, and using an arithmetic mean of the leakage weights to obtain a frequency component deviation value. According to the method for extracting frequency components in dynamic distorted sinusoidal signals and the device for implementing the method, spectrum leakages are cancelled and inhibited, and accordingly, frequency and amplitude values of frequency components in dynamic distorted sinusoidal signals are extracted accurately.

Description

technical field [0001] The invention relates to the field of dynamic signal testing and analysis, in particular to a method for extracting frequency components in dynamic sinusoidal distortion signals and a device for realizing the same. Background technique [0002] Sinusoidal signal is a signal with the most single frequency component, which is widely used in communication, power transmission, industrial automatic control, ultrasonic flaw detection and other fields. However, in the actual system, due to the influence of noise, transmission impedance, etc., the sinusoidal signal often has a certain degree of distortion. Taking the power system as an example, with the continuous increase of various types of nonlinear loads (high-power rectifier equipment, converter equipment, electric arc furnaces, electrified railways, and household appliances, etc.) in the power system, the voltage and current sinusoidal waveforms in the power system Distortion is becoming more and more s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01R23/16G01R23/20
Inventor 温和滕召胜王永黎福海唐求高云鹏姚文轩成达谭霞左培丽孟卓
Owner HUNAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap