Method and device for calibrating gas meter reporting success rate

Abstract

The invention relates to a method and a device for calibrating a gas meter to report the success rate. It is characterized in that the MCU module adopts STM32L series low-power chips, the MCU module is integrated with a UART module and a temperature sensor module, and the MCU module is equipped with a register of a clock crystal oscillator, which can store and set the value of the crystal oscillator, and the temperature sensor module can pass AD After reading the temperature value, the UART module is used for communication between the MCU module and the NB‑IoT module. The clock used in the present invention is a 32.768KHz crystal oscillator, and the 32.768kHz full-temperature orientation is relatively stable, and the temperature drift is small; the present invention does not use the fsys of the system itself to calibrate, but according to the current f' sys directly calculate the matching baud rate setting value to further ensure the stability of communication; at the same time, this case does not increase the hardware cost, which ensures the low cost of the system and improves the performance of the system.

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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