A high-precision blood alcohol concentration test circuit based on three electrodes

Abstract

The embodiment of the invention discloses a three-electrode-based high-precision blood alcohol concentration test circuit. The optimal working potential of a three-electrode bio-enzyme sensor WE is determined through a control circuit according to a cyclic voltammetry, a current time I-T curve under the potential is determined, a corresponding blood alcohol concentration is determined according to the I-T curve, a bipolar scanning circuit is set to generate the potential and the potential is input to a potentiostat circuit, the potentiostat circuit is used for inputting a stable voltage signal to a position between three-electrode bio-enzyme sensors CE and RE, a micro current detection circuit is used for detecting micro currents which is generated on the three-electrode bio-enzyme sensor WE due to the presence of blood alcohol and inputting the micro currents to a control circuit, and the control circuit judges the blood alcohol concentration according to the I-T curve, wherein a core control chip is STM32F103VCT6. The test circuit disclosed by the invention can realize the on-site real-time fast detection on the blood alcohol concentration of drivers driving under the influence of alcohol, and has the advantages of high sensitivity, good real-time performance and the like.

Description

technical field [0001] The invention belongs to the technical field of biosensor detection, in particular to a high-precision blood alcohol concentration testing circuit based on three electrodes. Background technique [0002] Blood alcohol concentration (BAC) is an important physiological indicator of the human body. The effect of alcohol on the human brain is closely related to the alcohol concentration in the human blood. Studies have shown that the damage of drinking to driving ability increases with the increase of BAC concentration, even when the BAC concentration is very low (0.1mg / mL). The damage has already begun. On June 15, 2013, the World Health Organization released the first "Global Status Report on Road Safety". The report shows that 1.27 million people die in road traffic accidents worldwide every year. of traffic accidents are related to drink driving, and drink driving has become the leading cause of death in car accidents. In September 2004, my country ...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it has strict requirements on the time limit for inspection, and the test results are inaccurate due to the instability of ethanol.

Another common test method is the wet chemical method, which has the problems of complicated operation and great influence from external factors.

Thereby these two methods have poor timeliness and low precision when carrying out blood alcohol concentration test, more can not be applied to field test

[0004] Therefore, in view of the above-mentioned defects existing in the current prior art, it is necessary to carry out research to provide a solution to solve the defects existing in the prior art, and avoid sending the collected blood samples to the accident department of the administrative department for inspection every time, which is time-consuming and labor-intensive. , the test results may be inaccurate due to factors such as test time difference

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