Motorcycle Airbag – Intelligent Detection and Deployment System

Background & Challenges

Motorcycle safety remains one of the most critical issues in the mobility sector. Unlike in cars, riders remain exposed and vulnerable to even the slightest fall. Equipment manufacturers are therefore seeking to develop solutions capable of responding faster than human reflexes to reduce the severity of accidents. It was with this in mind that a manufacturer sought to create a motorcycle airbag capable of deploying automatically before the rider hits the ground.

The project was based on the integration of a high-sensitivity accelerometer fitted to both the motorcycle and the rider’s gear, enabling continuous analysis of movements, changes in acceleration and subtle signals indicating a loss of control. The challenge was to design a device capable of interpreting this data in a matter of milliseconds, whilst remaining discreet, reliable and unaffected by the vibrations of riding.

Project challenges

The development of a smart airbag involves several critical constraints. The first lies in the accurate and rapid detection of a fall, which must be triggered within a few milliseconds to effectively protect the rider. It was necessary to create a system capable of distinguishing between a loss of grip or an abnormal movement and a deliberate action by the rider, whilst minimising false positives that might activate the airbag unnecessarily.

The second challenge concerned the integration of an on-board measurement module into both the motorcycle and the rider’s gear, providing a comprehensive view of actual movements. The sensors had to be robust enough to withstand vibrations, wind, impacts and temperature fluctuations, whilst remaining discreet and perfectly suited to everyday use.

Finally, the system had to maintain perfect synchronisation between the motorcycle and the rider. A loss of communication or misalignment between the two modules could compromise the accuracy of the deployment. Overall effectiveness therefore depended on the quality of the on-board electronics, the reliability of the analysis algorithms and the speed of the activation mechanism.

Our contribution

Dunasys has designed the on-board electronics responsible for analysing signals from the accelerometers in real time. This integrated intelligence enables the continuous measurement of linear acceleration, angular velocity and sudden changes in posture. The on-board algorithms instantly compare this data with the behavioural signatures of a real fall, identified during the training and testing phases.

When the system detects an inconsistent movement, a sudden deceleration, an abnormal rotation or a loss of balance, it immediately transmits the deployment command to the airbag. In its most advanced versions, the device has achieved an average activation time of less than eight milliseconds, a reaction twenty times faster than the average human reflex.

The prototypes were tested on dynamic test benches, in simulated real-life falls and during field trials. During these campaigns, the system reduced the deployment delay by 92% compared to traditional mechanical devices, whilst reducing the false positive rate observed during the initial iterations by a factor of four.

Results & Added Value

Tests have shown that cross-analysing the movements of the rider and the motorcycle makes it possible to anticipate loss of control with exceptional accuracy. The correct detection rate reached 98% during trials, whilst the reliability of fall detection proved stable even on poor road surfaces or during sporty riding, two environments that are particularly demanding for on-board systems.

The combination of Dunasys sensors and algorithms provided enhanced protection, capable of deploying the airbag even before the rider begins their free fall. In several scenarios, analyses show that the potential impact was reduced by nearly 60%, thanks to the early activation of the body protection system.

Beyond performance, the project enabled the motorcycle equipment manufacturer to integrate invisible and fully automated technology, significantly enhancing the credibility of its product among professional motorcyclists, road safety organisations and insurers.

Conclusion

The intelligent motorcycle airbag system perfectly illustrates Dunasys’ mission: designing embedded technologies capable of intervening in a fraction of a second to protect the user. Thanks to discreet, robust, and highly responsive electronics, we help transform a simple piece of equipment into a truly advanced safety system.

On a motorcycle, milliseconds matter. Thanks to this innovation, they become an ally in saving lives.