Energy Metering Chip Research Articles

A Frequency Adaptive Data Collection Method for Internet of Things Nodes

The aim of this paper is to solve the problem of a large amount of redundant data in the process of large-scale acquisition of Internet of Things sensors. This paper proposes a frequency adaptive data sensing method based on revolving gate algorithm for STM32 power safety data acquisition system. The method realizes the intelligent control of current protection terminal through three-stage current protection algorithm and frequency adaptive data acquisition algorithm. First, the three-stage current protection algorithm is used to protect the circuit, which can trip quickly in case of overload, and reduce the peak current caused by some equipment when starting up, so as to avoid damage to the equipment. Second, the arithmetic mean of each statistic is compared with the last value reported to the server. If the absolute value of the difference between the two exceeds the specified threshold range, the reported value is updated. Otherwise, it is filtered out, and the data smoothness is calculated according to the rules. The data collection interval is dynamically adjusted according to the data smoothness, which can greatly reduce the collection of redundant data and the traffic consumption of Internet of Things devices. On the server side, the inverse algorithm is used for interpolation and reconstruction to recover the collected data. This method is applied to the developed electricity safety equipment, and the electricity consumption is monitored and collected continuously for 24 h. After filtering by the frequency adaptive algorithm, only 108 pieces of data records are reported for 28,713 pieces of original data, and the compression ratio reaches 99.49[Formula: see text]. Compared with other data collection strategies, this method significantly reduces the amount of redundant data collection and the energy consumption of terminal nodes. Furthermore, this method realizes the real-time perception of line data and environmental data through current, residual current, temperature sensor and electric energy metering chip, and controls the opening and closing of wire controlled micro circuit breaker through PC817 optocoupler to protect the safety of the circuit.

Construction of nano information storage model based on sensor bus

The size of semiconductor devices was decreasing, which brings severe challenges to traditional microelectronic technology. The improved memory model of floating gate MOS (metal–oxidesemiconductor) structure was proposed and applied. Based on this, the nano information storage model based on sensor bus was constructed. The sensor bus structure based on CAN (Controller Area Network) technology was designed by using the on-site regional control network and object connection embedding technology. The three-phase data acquisition system with the energy metering chip CS5490 as the core was used to collect the signals of the voltage and current sensors, and the CAN sensor bus controller was used to transmit the collected signals. The transmitted signal was stored in the information storage model of the nanocrystalline floating gate structure, which uses metal nanocrystals with the higher work function to store the charge. Increase the barrier between the storage node and the gate dielectric to improve program/erase and information retention. Experimental results show that the constructed model has longer data retention time while having low operating voltage and low power consumption.

An Energy Metering Chip With a Flexible Computing Engine

This paper presents an energy metering chip with a flexible computing engine. The flexible computing engine includes the metering program and a dedicated DSP. Besides providing the generally required energy metering data, the chip can also provide different energy metering and measurement data through the control registers accessible by a host MCU via the UART or SPI interface. The flexible computing engine adjusts the computing tasks of the DSP according to applications, reducing the amount of redundant computing and, therefore, reducing the power consumption. The chip can be used in general energy metering, fundamental energy metering, direct current (DC) energy metering, and various measurement and monitoring of the electricity signals. The energy metering chip is fabricated in a 0.11- $\mu$ m CMOS process. The chip meets the metering accuracy requirements by the international standard IEC-62053-21/22/23/24. The grid monitoring of the chip meets the international standard IEC-61000-4-30 Class S. The total power consumption when performing the energy metering is only 6.6 mW. The chip is currently in production.

Research on Three-Phase Electronic Multifunctional Energy Meter

A three-phase electronic multi-function smart meter is designed to improve performance, cost performance, accuracy, overload capacity, and electromagnetic compatibility. A measuring meter with conventional power parameters was developed based on the switching power supply and energy metering chip MCU. Users can meet the requirements of anti-theft, power grid harmonic content measurement. This paper provides solutions, implementation schemes and test methods for multi-function power meters. Designing a three-phase electronic multi-function energy meter with high reliability, low cost, high accuracy, and advanced performance.

Single-phase Energy Metering Circuit Applied in Food System Based on ADE7755 Chip

This study designs a single-phase food measurement circuit for food system users. The circuit adopts a high-precision single-phase energy metering chip ADE7755 produced by the United States ADI company for the acquisition of the electrical energy and uses the high-performance SCM AT89C51 as a whole control center of electrical acquisition circuits. The working principle schematic of the single-phase energy metering chip circuit, the diagram of the components of the entire energy metering circuit and the software flow chart are introduced in study. At last, the test situations is introduced, the test results are analyzed and compared, the test showed that the energy metering circuit has the high precision.

Single-Phase Energy Metering Chip with Built-in Calibration Function

This paper presents a single-phase energy metering chip with built-in calibration function to measure electric power quantities. The entire chip consists of an analog front end, a filter block, a computation engine, a calibration engine, and an external interface block. The key design issues are how to reduce the implementation costs of the computation engine from repeatedly used arithmetic operations and how to simplify calibration procedure and reduce calibration time. The proposed energy metering chip simplifies the computation engine using time-division multiplexed arithmetic units. It also provides a simple and fast calibration scheme by using integrated digital calibration functionality. The chip is fabricated with 0.18-μm six-layer metal CMOS process and housed in a 32-pin quad-flat no-leads (QFN) package. It operates at a clock speed of 4096 kHz and consumes 9.84 mW in 3.3 V supply.

Research on Smart Residential Community and Power Management System

This paper analyses the present situation of residential energy management system, designed a kind of intelligent electric energy management system based on CAN bus. The system uses the underlying field level, management level and upper management. The field realize the real-time network measurement with a special electric energy metering chip AD7755 and a AD/ conversion function microprocessor STM32 as the core; through the CAN bus timing or random copy electric energy data, its purpose is to use modern network communication technology, and establish a residential comprehensive management center and security system, information service system and Home Furnishing intelligent integrated system.

An Improved Reconstruction Algorithm Based on Compressed Sensing for Power Quality Analysis in Wireless Sensor Networks of Smart Grid

In recent years , the growing power quality problems in smart grid cause widespread concern at home and abroad . Because the traditional power quality algorithms which are based on Nyquist sampling theory have the drawbacks of complicated, heavy computations and poor real-time performance when sampling and analyzing continuous massive signals in smart grid. This paper discussed an improved reconstruction algorithm based on compressed sensing due to the sparsity of power quality signals in frequency domain for power quality analysis .By using the ZigBee wireless gateway for wireless sensor networks and energy metering chip, we develop a single meter node to do relative experiments. In the condition of the real test-bed and several compared experiments, power quality information in the highly compression ratio has good performance according to CSR (Compression Sampling Ratio), SNR (Signal to Noise Ratio), MSE (Mean Squared Error) and ERP (Energy Recovery Percentage) , and will be widely used in power quality analysis.

Design of Locomotive Energy Consumption Monitoring System

The paper introduces the structure of locomotive energy consumption monitoring system, technical parameters and the method of software design. The system uses electric energy metering chip CS5463, ARM kernel STM32F103R8T6, GPRS wireless communication module and RS485 communication interface to realize the multi-system locomotive AC and DC measurement, remote meter reading and other devices and locomotive communication connection. The liquid crystal display LCD stores the locomotive power information, the current, voltage, power and energy data with their own real-time clock time-sharing data fragmentation such as type test on the system, the system of high precision, strong anti-interference ability, low power consumption, safety etc.

Research of Weak AC Current Accuracy Measurement Based on ADE7816

Converted current signal by mutual inductance coil is merely microampere level when using current transformers measure milliamps-power currents, the weak signal is too easily be interference by external environment to achieve accurate measurements. For the power current below 6mA, designed a system based on energy metering chip ADE7816. By analyzing the experimental results, proposed schemes to reduce the measurement error for the first time. The results show that, when the load is maintained at 10Ω and the value of PGA is set to 4 from 0, the average relative error of results is reduced to 0.63%; additionally, when the value of PGA is maintained at 0, but the load Increased to 52Ω from10Ω, the average relative error of results is 0.02%.

Software Design and Prepayment of Intelligent Electric Meter

This paper gives a solution of prepayment and software design in the intelligent electric meter. Firstly introduces the development and the future trend of the meter, the overall design scheme is given, a software platform built. Then the design of the CPU IC card circuit, IC card processing program, and the main program, real-time power program and electricity consumption measurement program are also designed. System uses LPC2290 as the main control chip, using ADI company ADE7755 electric energy metering chip, the software uses the modular design, not only can realize the measurement of electric energy, but also can accomplish the communication with the host computer, easy to build energy platform for energy management and control etc.