NB-IoT intelligent gas meter based on OpenCPU technology

Abstract

The invention discloses an NB-IoT intelligent gas meter based on an OpenCPU technology, and solves the defects of complex structure, numerous interfaces, high cost and high development difficulty of the existing intelligent gas meter. The NB-IoT intelligent gas meter is characterized by comprising a base meter and an NB-IoT main control circuit board based on the OpenCPU technology; the base meter comprises a metering assembly, an intelligent head and an LCD display screen. The main control circuit board is integrally mounted on the intelligent head; the base meter further comprises a reed switch counter and a motor valve. The main control circuit board comprises an NB-IoT module circuit supporting an OpenCPU, a metering sampling circuit and a valve driving circuit. The NB-IoT intelligent gas meter further comprises a menu key, an infrared circuit, an antenna module, an ESIM card circuit, a power circuit and a power voltage monitoring circuit which are coupled to the NB-IoT module circuit supporting the OpenCPU. According to the NB-IoT intelligent gas meter based on the OpenCPU technology, a single module chip is adopted, a traditional framework is replaced based on the OpenCPU technology, complex interfaces are reduced, the integration degree is high, the size is small, and the design complexity is reduced.

Description

technical field [0001] The invention relates to a smart gas meter, in particular to an NB-IoT smart gas meter based on OpenCPU technology. Background technique [0002] Now the smart gas meter industry is basically the core structure of the MCU+Flash+NB-IoT module. Among them, the MCU is mainly responsible for the system control of the entire gas meter, including metering sampling, LCD screen display, communication, switch valve, data storage, etc., and plays a role in the control and cooperation between the modules of the entire smart gas meter and the control of the specific working status. When metering and sampling is required, the MCU is responsible for sampling and data processing; when it is necessary to display the gas consumption information on the meter end on the LCD screen, the MCU is responsible for the extraction and control display of the gas consumption information; when it is necessary to report data information, the MCU will first wake up the NB module, an...

AI Technical Summary

Problems solved by technology

[0007] 2) Because many interfaces are involved, when the data of a certain interface is transmitted incorrectly on the circuit board, it will affect the operation of the entire system, and the anti-interference ability and reliability of the system are relatively low

[0008] 3) The core system of the existing technology uses three chips with high cost and large volume

[0009] 4) The existing technology uses MCU as the control unit. When designing and developing, it is necessary to develop the underlying driver and develop the logic business layer. The project development cycle is long and the development difficulty is high.

Images