Continuous monitoring of core body temperature(CBT) holds significant research value in many outdoor work scenarios.A sensor based on the single-channel heat flux(HF) method is introduced

covering aspects such as the sensor’s measurement principle

data acquisition methods

feature engineering selection

model construction

and evaluation metrics.Through grid search

the algorithm model is trained on the training set

resulting in a final decision tree regression algorithm.On a test set of 10 individuals

the mean absolute error (MAE) is 0.257℃

and the method demonstrated a certain ability to follow changes in core body temperature.This technologty provides certain support for the popularization and application of the single-channel heat flux method in measuring human core body temperature.