Method and system for noninvasively detecting blood alcohol content based on Raman scattering

Abstract

The invention relates to a method and a system for noninvasively detecting a blood alcohol content based on Raman scattering. The method comprises the following steps: acquiring Raman scattering spectrum information of one group of alcohol solution blood samples with known concentration by adopting a transmission and reflection manner, establishing a quantitative mathematic relation between a blood alcohol concentration and the Raman peak strength of a Raman scattering spectrum to form a calibrating model; training the calibrating model and obtaining an optimal calibrating model; acquiring Raman scattering spectrum information of to-be-detected blood of a human body by adopting a transmission and reflection manner, and establishing a to-be-tested sample set; and denoising the obtained to-be-tested sample set by using a wavelet analysis method; and obtaining an alcohol concentration predicted value of detecting the blood of the human body by using the to-be-tested sample set as the input of the optical calibrating model. The system comprises a laser emitting module, a signal receiving module, a signal processing module and a digital display module which are sequentially connected. Compared with the prior art, the method has the advantages of rapidness, real time, noninvasive effect and the like.

Description

Technical field [0001] The invention relates to the technical field of blood alcohol content detection, in particular to a method and system for non-invasive blood alcohol content detection based on Raman scattering. Background technique [0002] With the rapid development of my country's economy, the rapid improvement of people's living standards, the rapid spread of private cars, and frequent traffic accidents caused by drunk driving. Therefore, from a safety point of view, the traffic police department promptly detects the alcohol concentration in car drivers and prohibits drunk driving as an effective means to reduce and prevent traffic accidents caused by drunk driving. At present, there are two commonly used methods to detect human blood alcohol concentration: blood test method and breath test method. [0003] The blood test method is the most direct and accurate method because it directly detects the blood samples taken, and the test results are not affected by other factor...

AI Technical Summary

Problems solved by technology

And this proportional coefficient is affected by the individual physiological structure, race, environment and exhalation skills of the detected object, and it changes greatly.

Therefore, when targeting the individual detected object, the error is large and the accuracy is poor, and the detection data can only be used as a reference and cannot be used as strong judicial evidence

When the detected object has alcohol residue in the mouth, the measurement result will be high, and when the detected object hiccups or vomits, the effect will be more obvious

In addition, in order to avoid the penalty of drunk driving, the suspected drunk driving driver will drink alcohol to interfere with the detection before stopping the detection, which will definitely seriously distort the detection results and cause wrong judgments

In addition, the breath test requires the subject to continue exhaling to the detector within a certain period of time, which cannot be continuously measured.

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