Detection method and circuit for alternating electric signal

Abstract

The application discloses a detection method for an alternating electric signal. The method is applied to a detection circuit. The detection circuit includes a signal input module, a signal conversionmodule, an N-level proportion operational circuit module and a signal output module, and includes: the signal input module used for receiving an original signal; the signal conversion module, used for converting the original signal into an initial voltage signal; the N-level proportion operational circuit module, used for adjusting the initial voltage signal into a target voltage signal which satisfies a detection condition of a target detection device, wherein N is a natural number greater than 1; and the signal output module used for outputting the target voltage signal to the target detection device for detection. An embodiment of the invention further provides a corresponding detection circuit for an alternating electric signal. The technical solution of the application can accuratelyadjust alternating voltages or alternating current signals of different signal amplitudes through a multi-level proportion operational circuit, thus satisfying conditions of accurate detection of a detection device.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method for detecting an alternating current signal and a detection circuit. Background technique [0002] In the field of AC power consumption, voltage and current detection is an essential function, and it is the source of information for judging the working status of the system, so as to control the system as a whole and realize the normal operation of the system. [0003] At present, for the detection method of AC voltage or AC current signal, there are dedicated voltage / current detection chips in the industry, whose performance is stable and reliable, and the output accuracy of different types of chips is flexible and adjustable. However, compared with alternative circuits with the same signal detection accuracy, such as integrated operational amplifiers, their cost is relatively high and their market competitiveness is poor. Integrated operational amplifiers are integ...

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Problems solved by technology

[0004] However, in the current field of voltage detection, the proportional operation circuit composed of integrated operational amplifiers is a single-stage proportional operation circuit. The voltage detection circuit composed of such a single-stage proportional operation circuit has limited voltage adjustment effect, poor filtering ability, and does not Capable of threshold judgment

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