Page 100 - Abstract book - TJSSF-2020

Thailand – Japan Student Science Fair 2020 (TJ-SSF 2020)
“Seeding Innovations through Fostering Thailand – Japan Youth Friendship”

Designing a Blood Alcohol Analyzer Device by Using an Infrared Sensor

Chinnachot Wettayanont , Chaipat Santivimol
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Advisors: Piyanuch Keawaram , Manas Sittishoktram
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Princess Chulabhorn Science High School Phetchaburi
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Abstract

According to the World Health Organization, alcohol causes about 1 in 20 deaths worldwide every year,
including the problem of drunk driving, violence and disorders of the body that are affected by alcohol.
The government has controlled by establishing alcohol content checkpoints to solve these problems and
using various methods such as an alcohol breath tester and a direct blood test. Also, there is research

indicated that infrared light could be measure alcohol content. So, this project aimed to study and
determine the alcohol content in both blood and water by using the principle of infrared light to operate.
Two types of infrared sensors, CNY70 (950 nm) and IR LED (940 nm) were used to determine the
amount of alcohol in water and blood at various alcohol concentration from 0% - 100% with 10% increment
in order to create the standard graph. The results from measurement showed that the signal from CNY70
sensor closely related to the amount of alcohol in water with 0.995 coefficient of determination (R²).
Therefore, it is a sensor that can measure the differences exquisitely due to the alcohol in the water is
less disturbed than the alcohol in the blood. From this result, this device can be used to measure the
amount of alcohol in water and beverages accurately. However, it should be continued development.

Keywords: Blood alcohol content, Infrared Sensor, Measuring alcohol content

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