Multifunctional digital instrument

Abstract

The invention discloses a multifunctional digital instrument and relates to a digital instrument used on an electrical instrument cabinet body. The multifunctional digital instrument comprises a power supply management module, a single-chip microcomputer, a storage chip, a measuring chip, an LCD (liquid crystal display) driving module and an LCD display module, wherein the measuring chip is connected with the single-chip microcomputer; the storage chip is connected with the single-chip microcomputer; one output end of the single-chip microcomputer is connected with the LCD driving module; the output end of the LCD driving module is connected with the LCD display module; the measuring chip is connected with the single-chip microcomputer, and is provided with a collection circuit formed by three voltage transformers and three current transformers; the single-chip microcomputer is connected with a key interface, a communication interface, and a digital input and output interface; and the power supply management module is electrically connected with the single-chip microcomputer, the storage chip, the measuring chip, the LCD driving module, the LCD display module, the communication interface and the digital input and output interface. The multifunctional digital instrument is strong in anti-interference ability, and high in reliability, safety degree and accuracy.

Description

technical field [0001] The invention relates to a digital display instrument used on an electric meter cabinet body. Background technique [0002] With the fierce competition in the electricity meter market, power meters are gradually developing towards multi-tariff, multi-functional, high-precision, and low-cost directions. Most of the current power meters use pointer meters, and their accuracy is not high. The information collection is directly from There is strong interference in the external line acquisition, which also leads to deviations in the instrument display. Contents of the invention [0003] The purpose of the present invention is to provide a multifunctional digital display instrument with high precision and strong anti-interference ability. [0004] The present invention includes a power management module, a single-chip computer, a storage chip, a metering chip, an LED driver module, and an LED display module. The metering chip is connected to the single-ch...

AI Technical Summary

Problems solved by technology

[0002] With the fierce competition in the electricity meter market, power meters are gradually developing towards multi-tariff, multi-functional, high-precision, and low-cost directions. Most of the current power meters use pointer meters, and their accuracy is not high, and their information is collected directly from There is strong interference in the external line acquisition, which also leads to deviations in the instrument display

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