Voltage characteristic detection system and method of SOC (System On Chip) intelligent electric meter

Abstract

The invention discloses voltage characteristic detection system and method of an SOC (System On Chip) intelligent electric meter. The system comprises a three-phase voltage signal sampling circuit, a three-phase voltage signal filter circuit, an SOC internal zero crossing detector and an SOC internal timer, wherein the SOC internal zero crossing detector is used for detecting a zero-crossing state and a zero-crossing sequence of each phase voltage signal, the SOC internal timer is used for detecting the length of each phase voltage signal period, the three-phase voltage signal filter circuit which is arranged through the external of a chip filters out high-frequency alternating current signals to ensure the accuracy of zero-crossing detection in a SOC chip, and the SOC internal timer interrupts length detection of each phase voltage signal period based on the zero-crossing detection generated by the zero crossing detector. By the technical scheme of the invention, the zero-crossing detection, reverse phase sequence detection and frequency measurement can be realized without realizing an algorithm at the SOC end, an algorithm of the zero-crossing detection, the reverse phase sequence detection and the frequency measurement avoid occupying SOC resources, and the execution efficiency of a software of a SOC processing unit is optimized.

Description

technical field [0001] The invention relates to the technical field of electric energy metering and smart meters, in particular to a system and method for detecting voltage characteristics in SOC-based smart meters, including zero-crossing detection, reverse phase sequence detection and frequency measurement. Background technique [0002] With the increasing maturity of SOC (System on a Chip) technology and the high integration of resources, it is favored by smart meter manufacturers. At present, the SOC-based single-chip processing chip solution has been able to realize all the functions of the smart meter based on the traditional MCU+metering chip architecture. Algorithm software. The metering algorithm is the core of the entire smart meter, and its safe and stable execution must be ensured. Since the management function and measurement algorithm function of the SOC-based smart meter are implemented on the same processing chip, the execution of the measurement algorithm ...

AI Technical Summary

Problems solved by technology

Since the management function and metering algorithm function of the SOC-based smart meter are implemented on the same processing chip, the execution of the metering algorithm is relatively frequent, and the execution requires high real-time performance.

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