Method and device for calibrating reporting success rate of gas meter

Abstract

The invention relates to a method and device for calibrating the reporting success rate of a gas meter. The device is characterized in that the MCU module adopts an STM32L series low-power-consumptionchip, wherein the MCU module is integrated with a UART module and a temperature sensor module, a register of a clock crystal oscillator is configured in the MCU module and can store and set the valueof the crystal oscillator, the temperature sensor module can read the temperature value through AD, and the UART module is used for communication between the MCU module and the NB-IoT module. According to the invention, the adopted clock is a 32.768 KHz crystal oscillator, the 32.768 KHz full-temperature orientation is relatively stable, and the temperature drift is small. Compared with the priorart, the method does not use the fsys of the system for calibration, but directly calculates the Baud rate set value matched with the current f 'sys value according to the current f' sys value, further guarantees the communication stability, does not increase the hardware cost, guarantees the low cost of the system, and improves the performance of the system at the same time.

Description

technical field [0001] The invention relates to a method and a device for calibrating a gas meter to report the success rate. Background technique [0002] At present, NB-IoT gas meters have been gradually promoted and used in the market. NB-IoT gas meters use the internal NB module to report data to the cloud server through the LPWAN network for background server processing and use. In NB-IoT gas meters, NB- The IoT communication module communicates with the system through UART communication between the main control chip MCU inside the gas meter and the NB-IoT communication module through AT commands. -The accuracy of communication between IoT modules. At the same time, in order to comply with the trend of low-power and low-cost gas meters in the market, the clock signal source used by the UART module inside the MCU is its internal RC clock. Since it is impossible to determine the environment used by the NB-IoT gas meter (such as indoors and outdoors, geographical locatio...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the UART clock frequency is deviated due to the influence of the external environment temperature on the internal clock during the reporting process of the gas meter, the baud rate is abnormal, and the success rate of the report is affected, the present invention provides a calibration gas meter The method of reporting the success rate and the technical solution of the device ensure that the UART communication baud rate is normal, thereby ensuring the success rate of reporting

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