This is how your mobile can save you from testing positive for a DGT breathalyzer test

Technology News

The mobile has all the necessary technology to know if you are able to get behind the wheel after sitting at the tableData from accelerometers – sensors found in most current cell phones that detect a person’s footsteps – can be used to determine if its owner is under the influence of alcohol and has exceeded the permitted BAC for driving.

A study carried out by the universities of Stanford and Pittsburgh (United States) used 22 volunteers who were given a dose of vodka sufficient to produce an amount of alcohol aspirated in air of 0.2% concentration in blood – in the United States it is used a different system, with a limit allowed to drive of 0.08%.

Subsequently, they asked people to walk ten steps in a straight line and turn around and take another ten steps. The study analyzed the data obtained by the accelerometer of their mobile devices – which were placed in the lumbar region – during the next seven hours.

Using accelerometer data, the researchers were able to determine with 92.5% accuracy when a person had a blood alcohol level greater than 0.08% Trr, and therefore exceeded the amount allowed for driving.

The two most determining data to discern whether a person has consumed alcohol through the mobile phone and the accelerometer are the amplitude of the signal and the variance of the ‘x’ axis, that is, the sway when walking, according to the research, published in this Tuesday in the Journal of Studies on Alcohol and Drugs.

This data could be used to alert people that they are not in a position to drive if they exceed the limit allowed by law , since 50% of people are not aware of when they have drunk more than the legal rate, as explained the authors and collects New Scientist .

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