Method of signal approximation in differential scanning calorimeter

The paper analyzes the methods of reconstructing time-local information signals used in differential scanning calorimeters (DSC) and makes a choice on wavelet functions. Based on the selected maternal wavelet, a technique was proposed for approximating the signals obtained experimentally with a DSC device. Approbation of the technique for single-peak and two-peak signals was carried out. Having the possibility to change the parameters of the approximating function in the course of the mathematical description of the signal, the possibility of using the technique for working with substances possessing endo- and exothermic properties at the time of the phase transition was proved. Evaluations of the effect of digitizing the signals on the accuracy of the measured differential temperature were given. As a result, the relative error was estimated by the approximating function when using the proposed technique from the number of iterative calculations performed.