ELECTRIC WAVE TYPE BIOSENSOR
An electric wave type biosensor includes: an electromagnetic wave irradiation unit; and a reflected wave receiving unit which receives a reflected wave and obtains an I signal and a Q signal. The electric wave type biosensor further includes: an I-Q norm angular velocity calculation unit which calculates an angular velocity and an IQ norm of the I signal and the Q signal, based on the I signal and the Q signal; a bio-information extract unit which extracts bio-information of the living body, based on the calculated angular velocity; and an output determination unit which determines whether the bio-information extracted by the bio-information extract unit is to be output based on whether a size of the calculated angular velocity is within a first threshold value.
1 . An electric wave type biosensor comprising:
an electromagnetic wave irradiation unit which irradiates a body surface of a living body with an electromagnetic wave;
a reflected wave receiving unit which receives a reflected wave obtained as the electromagnetic wave irradiated by the electromagnetic wave irradiation unit and then reflected on the body surface, and obtains an I signal obtained by multiplying the irradiated electromagnetic wave signal and the received reflected signal, and a Q signal obtained by delaying the I signal by a predetermined phase;
an I-Q norm angular velocity calculation unit which calculates an angular velocity and an IQ norm of the I signal and the Q signal, based on the I signal and the Q signal which are obtained by the reflected wave receiving unit;
a bio-information extract unit which extracts bio-information of the living body, based on the angular velocity calculated by the I-Q norm angular velocity calculation unit; and
an output determination unit which determines whether or not the bio-information extracted by the bio-information extract unit is to be output based on whether or not a size of the angular velocity calculated by the I-Q norm angular velocity calculation unit is within a first threshold value.
2 . The electric wave type biosensor according to claim 1 ,
wherein after determining that the bio-information is not to be output, the output determination unit determines that the bio-information extracted by the bio-information extract unit is to be output in a case where the IQ norm calculated by the I-Q norm angular velocity calculation unit is within a second threshold value, and the size of the angular velocity calculated by the I-Q norm angular velocity calculation unit is within the first threshold value.
3 . The electric wave type biosensor according to claim 1 , further comprising:
an estimating unit which estimates the size of the angular velocity based on data of the angular velocity of a time series which is calculated by the I-Q norm angular velocity calculation unit,
wherein the output determination unit determines whether or not the bio-information extracted by the bio-information extract unit is to be output, based on the size of the angular velocity estimated by the estimating unit and based on whether or not a size of the estimated angular velocity is within the first threshold value.