Patent ID: 9186079
Filing Date: 2015-11-17
Classification: A61B,G01R

Abstract:
1. A system for measuring a peak frequency of a signal for analyzing condition of a subject, which comprises: an electromagnetic wave transmitting and receiving unit that irradiates a continuous electromagnetic wave having a predetermined frequency to a subject, receives a reflected wave from the subject, and outputs a phase difference signal between an irradiation wave and the reflected wave; and a signal analysis unit that obtains, with a spectrum estimation utilizing a Maximum Entropy Method with a predetermined analysis duration, a frequency indicative of a occurrence frequency of a peak component of a signal, which is included by the phase difference signal between said irradiation wave and the reflected wave, and is generated substantially periodically in accordance with substantially a stationary change of the subject to be measured, and conducts repeatedly a process of calculating said frequency on a time axis of the phase difference signal.