CAI Control d'Alcholemia Integrat
A handlebar that detects alcohol consumption in bicycle users and stops them from driving

Opportunity

Detect bicycle users who have exceeded the legal limit of alcohol consumption and prevent them from driving.

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We decided to focus on the “Bicing” sharing service in Barcelona as it is the most widely used shared public renting option in Barcelona with an increasing number of users since the pandemic. The renting of “Bicing” does not require to have a driving license which attracts a lot of inexperienced and young drivers.

 

Solution

A handlebar with a transdermal sensor that detects the amount of alcohol consumed by the user and “locks” a bicycle when the user exceeds the legal amount of alcohol consumed, avoiding the person to drive.

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How?

The transdermal sensor measures the TAC (transdermal alcohol content) and converts it into BAC (blood alcohol content) by using a biosensor, the result is linked to a lock located in the wheel of the bicycle. When the legal amount is exceeded, the lock progressively stops the bicycle from functioning.

 

Prototype

A prototype was build as a “simulation” of how the product would work. For the simulation, we used arduino and sensors such as a "force sensitive resistor" integrated in the handlebar of the bicycle to simulate when the user presses it and a "servo motor" to lock or unlock the bicycle according to the result displayed in the monitor.