| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a biological information measuring system which enables desired information relating to a subject to be obtained by obtaining a phase difference while properly adjusting the level of a signal based on a reflected wave reflected by the surface of the subject of microwaves applied to the subject so as to avoid influence of noise accompanying a movement of the subject not subjected to measurement. <P>SOLUTION: A reflected wave signal including a noise component obtained by a microwave transmission and reception unit 11 is subjected to adjustment of fixing the level of a reflected wave signal by an adjustment unit 12. Variation in amplitude component in an in-phase component signal and an orthogonal component signal obtained by a quadrature detection unit 13 is suppressed to eliminate an influence of the variation in the amplitude component on the calculation of a phase difference by an arithmetic unit 14. Accordingly, a phase difference signal properly corresponding to the micromotion of an object to be measured is obtained efficiently. Using the phase difference signal, the states of heart rate, respiration, or the like are measured appropriately and the state of the subject is evaluated appropriately. <P>COPYRIGHT: (C)2011,JPO&INPIT |
