Detection method and system for alcohol content in human body on the basis of near infrared spectrum

Abstract

The invention relates to a detection method and system for alcohol content in a human body on the basis of a near infrared spectrum. The detection system comprises a light source, an optical fiber probe, a data processing module and a digital display module. According to the quantitative relationship of the near infrared absorption spectrum of the group of keys, such as C-O, C-C and the like of an alcohol molecule and alcohol content, an alcohol reflection spectrum in skin and blood is detected by an optical sensor probe; and after the alcohol reflection spectrum is subjected to wavelet analysis and noise removal, a quantitative relationship between the spectrum characteristic of the human body alcohol and the alcohol content is built, and a partial least square (PLS) correction model is built so as to achieve the purpose of detecting the alcohol content in the human body.

Description

technical field [0001] The invention relates to a method and system for detecting alcohol content in a human body based on near-infrared spectroscopy. Background technique [0002] With the development of technology in the transportation industry and the improvement of people's living standards, the incidence of traffic accidents caused by drunk driving has increased sharply. Therefore, from the perspective of active safety, detecting the alcohol content in the driver's body in time and prohibiting the driver from starting the car after drinking has become an effective means to reduce and prevent drunk driving. At present, the more commonly used means of detecting the alcohol content in the human body are blood test method and breath test method. [0003] The blood test method is the most direct and accurate because it directly detects the extracted venous or capillary blood samples, and the test results are not affected by other factors. However, during the blood test for...

AI Technical Summary

Problems solved by technology

A single proportional coefficient is used in the breath test instrument, and this proportional coefficient is affected by the individual's physiological structure, race and environment, and changes greatly. Therefore, when targeting an individual, the error is large and the accuracy is poor. As a reference, it cannot be used as a judicial basis. If the party has any objection to the breath test result, a blood test is required, and this test requires blood, which is likely to cause psychological confrontation between the party and takes a relatively long time

When the detected object has alcohol residue in the mouth, the measurement result will be high. When the detected object hiccups or vomits, the impact is more obvious. What's more, the detected driver avoids the punishment of drunk driving. Drinking alcohol before will interfere with the detection, which will seriously distort the detection results and cause wrong judgments

During the breath test, the detected object is required to continue exhaling to the detector within a certain period of time, which cannot be continuously measured

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