Bio signal measuring device and bio signal imaging device and brain imaging based brain disease diagnostic system

A bio-signal measuring device comprises:

• a measurement unit comprising a plurality of light irradiation units for irradiating light to the subject and a plurality of light receiving unit for detecting the reflected light signals after the light irradiated from the plurality of light irradiation units, and
• The arithmetic unit comprising a light irradiation control unit for controlling the light signal irradiated from each light irradiation unit and a signal processing unit that calculates the data for the subject in the time domain based on the optical signal detected by the light receiving unit,
• wherein the plurality of light irradiating units and a plurality of light receiving units are alternately arranged in a grid shape so that the light irradiating unit and the light receiving unit are alternately arranged on the outermost side of the measuring unit,
• An imaginary line connecting each light receiving unit located at the outermost portion of the measurement unit has a rectangular shape,
• wherein the light receiving unit is disposed at four vertices in the rectangular shape,
• wherein the light irradiation control unit includes an optical characterization unit for selecting the three or more wavelength signals;
• an optical modulator for generating three or more modulated signals by modulating the three or more wavelength signals selected by the optical characterization unit with different frequencies;
• and a light control unit for controlling the time the light is irradiated from each light irradiation unit so that three or more modulated signals are sequentially irradiated with a time difference based on one light irradiation unit,
• wherein the signal processing unit includes:
• a signal demodulator for generating a demodulated signal by demodulating the optical signals respectively detected by the at least three light receiving units in time series corresponding to the preset positions of the light irradiation units;
• a signal restoration unit for restoring each demodulated signal generated by the signal demodulation unit to the form of a wavelength signal before modulation;
• a signal operation unit for generating an operation signal by calculating the shape of the wavelength signal restored by the signal restoration unit;
• and calculating the blood flow volume, blood flow velocity, and path length in the subject corresponding to the position of the light irradiation unit based on the operation signal generated by the signal calculating unit as data for the time domain and a data calculation unit,
• wherein the light irradiation control unit controls each light irradiation unit so that light modulated in response to three or more wavelength signals is sequentially irradiated with a time difference based on one light irradiation unit,
• in one light irradiator, light modulated in response to three or more wavelength signals is sequentially irradiated with a time difference,
• at least three light receiving units adjacent to one light emitting unit detect an optical signal corresponding to the modulated light sequentially irradiated with a time difference, respectively.
• wherein the signal processing unit demodulates the optical signals respectively detected by the at least three light receiving units in time series corresponding to the preset positions of the light irradiation units, and then restores the demodulated signal to the wavelength signal form before modulation. and calculates the blood flow volume, blood flow velocity, and path length in the subject as data for the time domain based on the restored wavelength signal shape.