Driven by the overall rapid development of the Internet of Things industry and market-driven, smart home manufacturers are welcoming historic development opportunities. The most basic parameter of the intelligent electrical appliance is the "electrical" parameter, which can intuitively reflect the operating state of the electrical appliance. The "electrical" parameters can be measured by embedding the electrical energy sensor, and the core component of the electrical energy sensor is the electrical energy measuring chip. The application direction of energy metering chips in the field of Internet of Things mainly includes: smart sockets, smart charging piles, intelligent street lamps and smart air conditioners. WIFI smart socket is the hottest application direction at present. It can realize intelligent control, energy saving, overcurrent and overvoltage overload protection, statistical power consumption information and environmental detection through user remote control or socket automatic control switch according to electric energy and environmental parameters. And other functions. Nowadays, well-known smart socket manufacturers on the market include Zi Mi, Green Rice, Caller, Wukong I8, etc. If you want to know how the materials of these sockets work, you can search for relevant disassembly articles on the Internet. Most of the power sensing parts commonly used in these smart sockets are SOP8 energy metering chip HLW8012, which has the characteristics of few peripheral components, small PCB area, and simple software. Therefore, many smart charging piles use HLW8012 as electric energy. Sensing core components. After a long period of market testing, HLW8012 has become a very mature energy metering solution in the IoT industry. Basic special energy metering chip HLW8012 HLW8012 is a dedicated energy metering chip specially designed for smart home, industrial measurement and other fields. It has built-in crystal oscillator, 2.43V reference power supply and power supply monitoring circuit. The peripheral circuit is very simple. Active power, power, current or voltage rms are output in high frequency pulses without the need to write complex software. After the product is calibrated, the active power can reach ±0.3% accuracy in the range of 1000:1, and the current and voltage RMS can reach ±0.5% accuracy in the range of 500:1. Figure 1: HLW8012 pin diagram Figure 2: Typical application schematic of HLW8012 Serial port free calibration type energy metering chip HLW8032 Heli also displayed a new energy metering chip HLW8032 for the technology official website. The following is a pin diagram: Figure 3: HLW8032 pin diagram From the chip pins, the HLW8032 adds a UART interface to the HLW8012. The TX of HLW8032 is PIN6, while the PIN6 of HLW8012 is active power pulse CF; the RX of HLW8032 is PIN8, and the PIN8 of HLW8012 is SEL pin. The PIN6 of the HLW8012 is a must-have pin. For many ARM chips, the pin connected to the CF is easily switched to the RX terminal of the MCU's UART interface. This design provides convenient hardware compatibility with the HLW8012. According to official data, when the HLW8032 is applied to the product and the measurement error of the finished product is at most 2%, the calibration process can be saved during the production process. However, Heli has retained the PF pin for the whole machine calibration. It seems that the advancement of HLW8032 should be to meet the requirements of different design interfaces; or to save the calibration process in part to improve production efficiency, and is willing to reduce the error index to a certain range of applications. HLW8032 can be regarded as a suitable transitional energy metering chip based on HLW8012 wide market application, designed to meet some applications and considering compatibility with HLW8012. The reason for the transition is that the electrical parameters of the energy sensor in the IoT application will not exceed the existing parameters. All-round energy metering chip HLW811X Through the side of understanding, the author found that there are more advanced chips than the HLW8032, the tentative model is HLW811X, the preliminary characteristics of this chip: (1) Integrated built-in crystal oscillator, more flexible communication interface (2) Provide 1 active power calculation, 1 voltage and 1 current RMS calculation (higher precision) (3) Integrate more safe power detection, more electrical parameter measurement and pass IO output (4) Less error-free calibration function (5) Working voltage: 3.3V According to the official, the final product will exceed the above expectations. If it is true, the application of this chip in the field of Internet of Things will be very extensive, I am looking forward to it. Market prospects With the rapid development of the Internet of Things and big data, the demand for data in intelligent life is bound to grow. Smart home appliances must be a combination of various types of sensors, and the power sensor as the most basic sensor, will become a standard, more compact, simple interface, multi-functional, intelligent. As a key component of the energy sensor, the energy metering chip will be developed in the direction of smaller size, stronger function, higher precision, higher integration, and simple self-learning ability. 1000V DC Power Supply has a variety of power output and current section models, the maximum output power can reach 36kw, current output can reach 96a, to meet the needs of customers for a variety of power and current section. 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