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US 12,203,844 B2Granted
Photo-acoustic sensor device and photo-acoustic sensing method of the same
AssigneeElectronics and Telecommunications Research Institute
InventorsBong Kyu Kim, Jong Deog Kim, Jeong Won Park, Chul Huh
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Abstract
Disclosed are a photo-acoustic sensor device and a photo-acoustic sensing method of the same. The sensing method includes providing a source light in a subject and receiving an ultrasonic wave generated in the subject by the source light. The source light may have a wavelength of 1400 nm to 2500 nm in a near-infrared band.
Claims4
A photo-acoustic sensing method, comprising:
- providing a source light in a subject;
- detecting an ultrasonic wave generated in the subject by the source light;
- and
- obtaining an absorption coefficient value of the subject,
- wherein the source light has a wavelength of 900 nm to 3000 nm in a near-infrared band,
- wherein the source light comprises:
- a first source light having a first wavelength band of 1800 nm to 2500 nm and generating a reference signal that includes a first noise value of the ultrasonic wave;
- and
- a second source light having a second wavelength band of 1500 nm to 1800 nm narrower than the first wavelength band and generating a measurement signal that includes a second noise value corresponding to the first noise value and the absorption coefficient value of the subject,
- wherein the absorption coefficient value is obtained by removing the second noise value subtracted from the first noise value.
7 more elements
A photo-acoustic sensor device, comprising:
- a light source configured to provide a source light to a subject;
- a detector configured to receive an ultrasonic wave generated in the subject by the source light;
- and
- a control unit configured to determine whether the subject is normal by comparing a detection signal of the ultrasonic wave with a reference signal,
- wherein the light source generates the source light having a wavelength of 900 nm to 3000 nm in a near-infrared band,
- wherein the source light comprises:
- a first source light having a first wavelength band of 1800 nm to 2500 nm and generating a reference signal that includes a first noise value of the ultrasonic wave;
- and
- a second source light having a second wavelength band of 1500 nm to 1800 nm narrower than the first wavelength band and generating a measurement signal that includes a second noise value corresponding to the first noise value and the absorption coefficient value of the subject,
- wherein the control unit obtains the absorption coefficient value by removing the second noise value subtracted from the first noise value and obtains a blood glucose value by comparing the absorption coefficient value with a reference.
7 more elements
Dependencies are inferred from the claim text.