FIELD: medical engineering. SUBSTANCE: device operation is based on taking remote measurements and following spectral analysis of small displacements of object body surface under the influence of breathing and heart beat. The device is designed in three versions so that it processes signals reflected from object body and those measured and re-emitted by special autonomous transducers spaced over the object body. Ultrasonic non-modulated signal having wavelength commensurable with displacement amplitude under the influence of breathing and heart beat is used as emitted signal. Relative phase telemetry method is applied and linear (with ambiguity removed) phase unit for measuring the received signal is used instead of synchronous detector in the tract of coherent reception. EFFECT: enhanced accuracy and reliability of measurements. 4 cl, 4 dwg
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