IR46 Single-Phase Metering Chip With Optical Isolation Interface
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Solution Overview
Problem
The existing single-phase intelligent Internet of Things electric energy meters lack a suitable metering chip that meets the IR46 standard, leading to issues with electrical isolation and reliable connection between modules, and the need for complex data correction and transmission, which affects real-time performance.
Innovation Solution
A single-phase electric energy metering chip with integrated current and voltage signal acquisition and correction units, full-wave and harmonic measurement units, terminal temperature measurement, and communication interfaces, along with an electrical isolation circuit, to ensure accurate data processing and simplified module connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-phase metering SOC chip is used to implement the metering core module, then the module can be realized with integrated functions, but the electrical isolation and reliable connection between modules cannot be guaranteed
Solution Approach 1:
The patent divides the metering system into two independent modules: a metering core module containing the single-phase metering chip for accurate measurement, and a management core module for data processing. These modules are electrically isolated through optical isolation technology, allowing each module to function independently while maintaining reliable electrical isolation. This segmentation resolves the contradiction by enabling integrated metering functions within the core module while ensuring isolation from the management module.
Solution Approach 2:
The patent introduces an optical isolation interface as an intermediary between the metering core module and the management core module. This intermediary uses optical signals to transmit data between modules without direct electrical connection, thereby maintaining electrical isolation while enabling reliable communication. The optical isolation interface acts as a mediator that preserves measurement accuracy while ensuring safety and reliability.
2Measurement precision
If data correction is performed in the management MCU and function expansion modules, then data accuracy can be improved, but the real-time performance of data transmission is degraded
Solution Approach 1:
The patent performs data correction in advance within the metering core module itself, during the measurement process. The single-phase metering chip completes phase correction, gain correction, and other data processing operations before transmitting the corrected data to the management core module. This preliminary action eliminates the need for subsequent correction operations in the management MCU, thereby maintaining high data accuracy while minimizing transmission delays and improving real-time performance.
3Adaptability or versatility
If multiple interfaces with complicated functions are used between metering core module and management core module, then data exchange capabilities are enhanced, but the complexity of electrical isolation and connection increases
Solution Approach 1:
The patent employs a universal optical isolation interface that can handle multiple types of data transmission (full-wave data, harmonic data, waveform data, control signals) through a single standardized communication protocol. This multi-functional interface design allows the system to achieve enhanced data exchange capabilities without proportionally increasing interface complexity, as the same optical isolation infrastructure supports various data types and communication modes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides reliable electrical isolation, simplified design, and reduced costs while ensuring real-time data processing and compliance with the IR46 standard, enhancing safety and performance of the next-generation intelligent meters.
Implementation Method 1
an isolation circuit that is connected to the signal interface of the metering chip and the signal interface of the metering MCU and is used for forming an electrical isolation between the two
Implementation Method 2
the current and voltage signal acquisition and correction unit is configured for performing analog-to-digital conversion on a voltage signal and a current signal
Data Source
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Figure 3
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AI summary
Provided are a single-phase electric energy metering chip and intelligent Internet of Things meter based on an IR46 standard. The single-phase electric energy metering chip comprises a current and voltage signal acquisition and correction unit, a full-wave measurement and metering unit, a harmonic measurement and metering unit, an original sampled data processing unit, a terminal temperature measurement unit, a communication interface, an energy output interface and an original waveform data output port; and the current and voltage signal acquisition and correction unit is configured for performing analog-to-digital conversion and phase and gain correction on voltage and current signals, the full-wave measurement and metering unit is configured for obtaining full-wave data, the harmonic measurement and metering unit is configured for obtaining harmonic data, the original waveform data processing unit is configured for obtaining original waveform data, and the terminal temperature measurement unit is configured for obtaining terminal temperature measurement data. According to the single-phase electric energy metering chip, the problems of electrical isolation and reliable connection between modules are solved, and development and production costs of a next-generation intelligent Internet of Things meter are reduced.