A Multi-Channel Temperature Measurement and Fusion System Based on Cortex-M4

In the surface meteorological observation service, uncontrollable factors, such as signal interference, extreme weather events, sensor failures, et al., inevitably cause temperature observables missing or observing errors, and then affecting integrity and accuracy of the single-channel measurements. However, collecting the temperature records in a multi-channel way can alleviate the data loss and improves the data reliability. This paper proposes a multi-channel temperature acquisition and fusion system, which takes the STM32F411 micro controller as its master chip. The system fuses the temperature observables from multiple channels, which can realize lower computer positioning. Finally, the lower computer transmits the temperature and location data to the software on upper computer by the 4G-network, and all the data can be displayed and stored there. We evaluate the performance of this system by comparing the fused data with the single-channel data. The test results show that the fused data perform better in terms of integrity and accuracy. During the tests, the system runs smoothly with data transferring stably, which indicates that it could be used in practice applications.