Human-Machine Interface with Evaluation of Human Functional Pressure

Y. A. Turovsky, Associate Professor, Head of Laboratory, e-mail: yaroslav_turovsk@mail.ru, S. D. Kurgalin, Head of the Department, A. A. Vahtin, Associate Professor, V. A. Belobrodsky, Postgraduate Student, Voronezh State University

The paper offers an architectural solution, which was used to design a version of functionally dependent human-machine interface, based on the detection, analysis and practical application of biomedical signals. Such signals characterize the functional pressure experienced by a human, which also includes the emotional component of human behavior. The results of processing both time and frequency features of the wave structure of heart rate variability provide a certain set of parameters, which corresponds to processes occurring when functional pressure of a human changes. These parameters can be used for forming commands in the frames of a developed "human-machine" interface. It is shown that the HRV signal, after an appropriate processing, can be used to form control commands for software (operating system and software applications). Such commands may be commands to change color settings of graphic interface, priorities of the program operation in the operating system, changes in multimedia applications operation. The designed interface greatly expands the functionality of human-machine interaction.

Keywords: human-computer interface, biomedical signal, digital signal processing, managing, wavelet-transformation, stress, heart rate variability

pp. 20–26