Relevant sinusoidal signal detection method and device

A sinusoidal signal and detection method technology, applied in the detection field, can solve the problems of large error in detection results, high requirements for signal smoothness, and poor anti-interference ability, so as to improve detection accuracy, improve anti-interference ability, and have good versatility. Effect

Active Publication Date: 2015-05-27
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Problems solved by technology

[0005] In view of this, the purpose of this application is to provide a correlation sinusoidal signal detection method and device to solve the problems of existing differential detection methods that require high signal smoothness, poor anti-interference ability, and large error in detection results

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  • Relevant sinusoidal signal detection method and device
  • Relevant sinusoidal signal detection method and device

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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0056] The embodiment of the present application discloses a correlation sinusoidal signal detection method and device to solve the problems of the existing differential detection method, which have high requirements on signal smoothness, poor anti-interference ability, and large error in detection results.

[0057] For ease of description, the two related sinusoidal signals involved in the embodiment of the present application are respectively named as a first sinusoidal signal and a second...

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Abstract

The invention discloses a relevant sinusoidal signal detection method and device. According to the relevant sinusoidal signal detection method, a first sinusoidal signal is sampled, a normal zero crossing point of the first sinusoidal signal is confirmed, and a first preset interval moment delayed after the normal zero crossing point is determined as an extreme value moment of the first sinusoidal signal, thereby confirming the instantaneous value of a second sinusoidal signal corresponding to the extreme value moment. When an interference signal is generated, a wave peak or a wave trough can be definitely generated in a corresponding position, that is, the differential coefficient in the corresponding position can meet the judgment condition of a differential detection method; as the wave peak and the wave trough are not directly detected in the relevant sinusoidal signal detection method, the influence of fake wave peaks and fake wave troughs caused by the interference signal to the detection accuracy can be effectively avoided, and the requirement on the smoothness of the signal is low. Therefore, by adopting the relevant sinusoidal signal detection method, the rate that the peak waves and the peak troughs are wrongly judged is greatly reduced, the anti-interference property is improved, the detection accuracy is improved, the requirement on the smoothness of the signal is reduced, good universality is achieved, and the problems of the prior art are solved.

Description

technical field [0001] The present application relates to the field of detection technology, in particular to a method and device for detecting a correlated sinusoidal signal. Background technique [0002] Correlated sinusoidal signals are two sinusoidal signals that have the same frequency and the same or different phases. In practical engineering applications, it is usually necessary to detect the instantaneous value of the other signal when one of the two related sinusoidal signals reaches the extreme value (including peak value and valley value). For example, for a voltage signal and a current signal with the same frequency in the same circuit, it is necessary to detect the extreme value of the current signal and the instantaneous value of the voltage signal when the extreme value occurs. [0003] In the prior art, the above-mentioned detection process is mainly realized through the differential detection method, that is, the derivative of the current signal is detected...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 张东盛刘亚祥区均灌程海珍王长恺
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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