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
CN102445600AInactive Publication Date: 2012-05-09SHANGHAI HUAJIAN ELECTRICAL EQUIP
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SHANGHAI HUAJIAN ELECTRICAL EQUIP
Publication Date
2012-05-09
Estimated Expiration
Not applicable ยท inactive patent

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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.
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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

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