Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optimization method based on traditional phase difference measurement and circuit

An optimization method and phase difference technology, applied in the field of signal processing, can solve problems such as low efficiency, interference of harmonics and spectral leakage, and complex processing

Inactive Publication Date: 2012-05-09
SHANGHAI HUAJIAN ELECTRICAL EQUIP
View PDF6 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the software method is used, the hardware is easy to implement, but the software processing is more complicated, and more complex algorithms need to be introduced. Although the measurement accuracy is improved to a certain extent, the efficiency is not high, and it is easily disturbed by harmonics and spectrum leakage. In some occasions that require measurement speed and response speed, it is not applicable

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
  • Optimization method based on traditional phase difference measurement and circuit
  • Optimization method based on traditional phase difference measurement and circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] The present invention will be further described below in conjunction with accompanying drawing:

[0007] See attached figure 1 , the circuit connection relationship is: the signal acquisition circuit, the two measured signals U1 and U2 are respectively connected to the transformer through the current limiting resistors R10 and R20, and the induced voltage signal is a sine wave signal output by the protection circuit; the signal at this time is Very weak, it needs to be amplified by the amplifying circuit. In the amplifying circuit, the amplitude of the signal needs to be adjusted through the potentiometer R2 / R12, and a follower is added to reduce the external interference to the signal; after the amplifying circuit, the signal is boosted and input to the non-inverting comparator To obtain the required rectangular wave signal, the above process is used as a rectangular wave generating circuit, and the two-way rectangular wave passes through the OR gate to obtain a rectan...

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, which belongs to the signal processing technology field, discloses an optimization method based on traditional phase difference measurement and a circuit. According to the method, two sinusoidal signals with different frequencies or a same frequencies pass through a signal collection circuit, an amplification circuit, and a comparison circuit as well as two paths of rectangular wave signals pass through an OR gate circuit so as to obtain a needed pulse signal; AD sampling is carried out so as to obtain a pulse width and a time difference of signal zero crossing, so that a phase difference is calculated. According to the invention, because a special circuit design is employed, phase drift generated by hardwares of a traditional zero cross detection circuit itself can be substantially changed, so that correlated subsequent processing of the phase difference on software becomes easier; therefore, the strong practicality is realized.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to an optimization method and circuit based on traditional phase difference measurement. Background technique [0002] The phase difference measurement of periodic signals is involved in industrial control, smart grid, communication, electrotechnical technology and other fields, and has a wide range of applications. At present, most of the applications are the same frequency periodic signal measurement. In order to obtain high-precision measurement results, it is often necessary to build complex hardware circuits and software program processing. Due to factors such as external interference or spectrum leakage, good results may not be obtained. [0003] The measurement method of phase difference can be divided into hardware and software. The hardware is mainly to realize the phase time difference of two signals through the hardware circuit, and then there is software to sa...

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): G01R25/00
Inventor 王晓辉孙旭熹张峰王琦
Owner SHANGHAI HUAJIAN ELECTRICAL EQUIP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com