Wearable device with built-in pedestrian airbag and control method thereof

Wearable belt-type airbag device for pedestrian protection based on horn and emergency braking sound detection

This technology is a wearable safety device that integrates a sound sensor, control unit, gas generator, and airbag into a belt worn by pedestrians. It instantly inflates the airbag when it detects a risk of collision based on vehicle horn or emergency braking sounds. The sensor and control unit are housed within the buckle, the gas generator is located on the side of the buckle, and the airbag is positioned between the inner and outer layers of the belt strap.

Conventional airbags are installed inside vehicles to protect occupants only, leaving pedestrians on the road unprotected. There has been no portable means available to directly protect a pedestrian's body in the moments immediately preceding a vehicle-pedestrian collision.

This technology determines if a vehicle is approaching by comparing the frequency pattern of sampled horn sounds against emergency horn patterns. If the sound volume exceeds a threshold, the airbag inflates, causing the outer part of the belt strap to detach and the airbag to deploy. Applicable to safety gear for children and the elderly, as well as protective equipment for nighttime road workers, it provides a wearable solution to reduce physical injury to pedestrians just before a collision.

‍

‍

Key Features:

• A wearable device equipped with a sensing unit that detects vehicle horn or emergency braking sounds, an operating gas generator, and an airbag that inflates with the gas.
• A control unit that triggers the gas generator to inflate the airbag when it determines an accident risk based on the sensed horn or emergency braking sounds.
• A structure where the sensing and control units are embedded in the belt buckle, the gas generator is on the side of the buckle, and the airbag is embedded between the outer and inner parts of the belt strap, with the outer strap detaching upon inflation.
• A control method that determines if a vehicle is approaching by comparing the frequency pattern of sampled horn sounds to emergency horn patterns and inflates the airbag if the sound volume exceeds a threshold.

‍