Noninvasive glucometer based on photoacoustic technology

Abstract

The invention discloses a noninvasive glucometer based on a photoacoustic technology. The noninvasive glucometer comprises an infrared narrow pulse light generating device for irradiating human fingers and a signal acquisition system for acquiring finger photoacoustic signals, wherein the infrared narrow pulse light generating device comprises a narrow pulse generating circuit and a driving circuit controlled by the infrared diode of the narrow pulse generating circuit, the narrow pulse generating circuit comprises a square-wave generator, an RC charging and discharging circuit and a combinational logic circuit used for generating narrow pulse signals, the square-wave generator and the RC charging and discharging circuit are both connected with the combinational logic circuit, the square-wave generator is connected with the RC charging and discharging circuit, and the output end of the combinational logic circuit is connected with the control end of the driving circuit. According to the invention, the noninvasive glucometer is simple in structure and convenient to use; and the photoacoustic signals can be better received by the signal acquisition system by controlling the frequency of the photoacoustic signals excited when the pulse light irradiates the fingers of the human body, so that the detection precision of the glucometer is improved.

Description

technical field [0001] The invention relates to the technical field of blood sugar, and more specifically relates to a non-invasive blood glucose meter based on photoacoustic technology. Background technique [0002] The non-invasive blood glucose meter is an instrument used to monitor the blood sugar of the human body, which can solve the pain of frequent finger pricking. The existing non-invasive detection methods include the method of obtaining tissue fluid in vitro and the method of directly detecting tissue. The reverse ion osmosis method is the representative of the method of obtaining tissue fluid in vitro , but it is easily affected by sweat. Infrared spectroscopy, Raman spectroscopy, metabolic heat integration method, impedance spectroscopy, and ultrasonic method are all direct detection tissue methods. They are common methods for non-invasive detection, but they are easily affected by external factors. influence, which reduces the test accuracy. Contents of the i...

AI Technical Summary

Problems solved by technology

[0002] The non-invasive blood glucose meter is an instrument used to monitor the blood sugar of the human body, which can solve the pain of frequent finger pricking. The existing non-invasive detection methods include the method of obtaining tissue fluid in vitro and the method of directly detecting tissue. The reverse ion osmosis method is the representative of the method of obtaining tissue fluid in vitro , but it is easily affected by sweat. Infrared spectroscopy, Raman spectroscopy, metabolic heat integration method, impedance spectroscopy, and ultrasonic method are all direct detection tissue methods. They are common methods for non-invasive detection, but they are easily affected by external factors. impact, which reduces the test accuracy

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