A kind of alcohol concentration detection method

Abstract

The invention discloses an alcohol concentration detection method. The method comprises the steps that S1, an exhaled air collection channel is opened; S2, indicator values of exhaled air of a human body are detected, wherein the indicator values include an exhalation flow value, single-exhalation duration, a real-time air pressure value, a real-time temperature value and a real-time output valueof an alcohol sensor; S3, whether the exhalation flow value and the single-exhalation duration both reach preset values is judged, if yes, S4 is executed, or otherwise air collection is stopped, and S1 is executed again after interval time t; S4, whether the real-time air pressure value of the air reaches a preset value is judged, if yes, S5 is executed, or otherwise S2 is executed; S5, accordingto the real-time air pressure value, the real-time temperature value and the real output value of the alcohol sensor, an alcohol concentration value of the exhaled air is calculated; and S6, accordingto the alcohol concentration value of the exhaled air, an alcohol concentration value in blood of the human body is calculated. Through the method, the accuracy of a detection result can be guaranteed while the alcohol concentration in the blood of the human body is detected in real time.

Description

technical field [0001] The invention relates to the detection field, in particular to an alcohol concentration detection method. Background technique [0002] The National Bureau of Quality Supervision, Inspection and Quarantine issued the "Threshold and Inspection of Blood and Breath Alcohol Content of Vehicle Drivers" which stipulates that drinking and driving refers to driving with a blood alcohol content greater than or equal to 20mg / 100ml and less than 80mg / 100ml. Behavior; drunk driving refers to the driving behavior in which the blood alcohol content of the vehicle driver is greater than or equal to 80mg / 100ml. [0003] At present, in order to prevent the driver from driving a motor vehicle after drinking, it is often judged whether the driver is driving under the influence of alcohol by detecting the breath alcohol concentration. Alcohol detector is an instrument for detecting the alcohol content in the driver's breath, including: portable alcohol detector, wall-mou...

AI Technical Summary

Problems solved by technology

Alcohol detector is an instrument to detect the alcohol content in the driver's breath, including: portable alcohol detector, wall-mounted alcohol detector, the operation process is simple, but the purchase price is expensive

At the same time, due to the difference in physique of different people, there are differences in the decomposition ability of alcohol, and the detection results of the alcohol detector are easily interfered by different body temperature and ambient temperature. It is impossible to determine whether the person under test is exhaling deeply, which will undoubtedly cause considerable misleading to the test results.

Further, the air pressure of the measured gas will also affect the detection results

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