Wearable apparatus for blood glucose measurement based on Raman spectroscopy
Blood glucose level measurement includes a light source configured to irradiate light to a subject; a monochrome part configured to separate wavelength components of the light that is reflected and scattered from the subject; a light receiver configured to receive the light transmitted via the monochrome part and to generate electrical signals based on the received light; and a processor configured to extract information on the blood glucose level of the subject based on a frequency shift of the light due to the Raman effect.
1 . A wearable apparatus for measuring blood glucose level, comprising:
a light source configured to irradiate light to a subject;
a monochrome part configured to separate wavelength components of the light that is reflected and scattered from the subject;
a light receiver configured to receive the light transmitted via the monochrome part and generates electrical signals representative of a Raman spectrum based on the received light;
a processor configured to extract information on the blood glucose level of the subject based on the Raman spectrum; and
a battery that provides electrical power to the wearable apparatus,
wherein the processor is configured to perform a calibration by:
controlling the light source to irradiate the light at a predetermined output for a predetermined duration; and
determining an intensity and an exposure duration for the light to be irradiated by the light source to subsequently measure the blood glucose level of the subject based on a peak corresponding to a specific Raman shift of the Raman spectrum acquired via the light receiver during the calibration.
2 . The wearable apparatus of claim 1 , wherein the light source, the monochrome part, the light receiver, the processor, and the battery are packaged within a housing.
3 . The wearable apparatus of claim 2 , further comprising:
a band coupled to the housing and configured to fix the housing to a body of the subject.
4 . The wearable apparatus of claim 1 , wherein the light source, the monochrome part, the light receiver, and the processor are packaged within a housing.
5 . The wearable apparatus of claim 4 , further comprising:
a band coupled to the housing and configured to fix the housing to a body of the subject.
6 . The wearable apparatus of claim 5 , wherein the battery is detachably mounted on the band.
7 . The wearable apparatus of claim 6 , further comprising:
an auxiliary battery configured to provide electrical power to the apparatus when the battery is being replaced.
8 . The wearable apparatus of claim 7 , wherein the auxiliary battery is disposed within the housing.
9 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a watch.
10 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a ring.
11 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a belt.
12 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a necklace.
13 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a wrist band.
14 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as an ankle band.
15 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as an arm band.
16 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a thigh band.
17 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a hair band.
18 . The wearable apparatus of claim 1 , wherein the wearable apparatus is implemented as a head band.
19 . The wearable apparatus of claim 1 , wherein the peak corresponding to the specific Raman shift is at 1450 cm −1 .
20 . The wearable apparatus of claim 1 , wherein the calibration is performed in response to the processor determining that the wearable apparatus is mounted on a body of the subject.