Development of a radiation shield for atmospheric temperature measurement system

To reduce the influence of radiation on temperature measurement, this research introduces a novel radiation shield. To reduce solar radiation effects, aluminum foil was used to cover the external surfaces of the plates. In addition, to reduce indirect radiation effects, a black coating was applied to cover the internal surfaces of the plates. The middle plates facilitate airflow to the sensors, thus accelerating the diffusion of radiant heat and reducing radiation interference. Temperature errors of the sensors equipped with the new radiation shield induced by various radiations (direct solar radiation, reflected radiation, diffused radiation, long-wave radiation) were quantified by employing computational fluid dynamics (CFD) and neural network methods. The experimental results showed that the mean absolute error, root mean square error, and correlation coefficient between the experimental and predicted temperature errors were 0.036 degrees C, 0.046 degrees C, and 0.99, respectively.