Device with dual airbags and dual bumpers for protecting pedestrains in front of car

Abstract

The invention discloses a device with dual airbags and dual bumpers for protecting pedestrains in the front of a car. The device is characterized in that an airbag assembly of an upper bumper is arranged on a reinforced beam, a controller is connected with an accelerometer for detecting the acceleration magnitude during car braking and an ultrasonic ranging instrument for detecting the distance between the bumpers and the pedestrains, and when the controller detects that the acceleration magnitude and the distance reach limit values simultaneously, an air generator is started to inflate the airbags, and then the airbags expand and open; a buffer energy absorber of a lower bumper is provided with 4 piezoelectric transducers uniformly, and when the pedestrains knock against the buffer energy absorber, a certain buffering function is played and the transducers receive a knocking signal; the other airbag system is arranged on a bonnet, the piezoelectric transducers transmit the signal to a bonnet airbag controller, and then the airbag expands, so that the bodies of the pedestrains are protected and the damage to the heads of the pedestrains is avoided. The device can be used for effectively protecting the safety of the pedestrains as well as the safety of the car and passengers, thus having high practical value.

Description

technical field [0001] The invention relates to the field of automobile supporting equipment, in particular to an automobile front pedestrian protection device with double safety airbags and double bumpers. Background technique [0002] Automobile collision safety issues have attracted more and more attention in today's society, and in the process of automobile collision, the most likely occurrence is the collision of the front of the car, which first involves the collision of the front bumper, and secondly involves the collision of the hood or Injury to the pedestrian's head from the front windshield. Therefore, it is of great significance to improve the passive safety of automobiles to study the collision characteristics of the front of the automobile and the protection effect on pedestrians, occupants and the automobile itself during the collision. [0003] The common automobile bumper is generally made up of plastic bumper guard plate, reinforcing beam and left and ri...

AI Technical Summary

Problems solved by technology

However, the protection provided by bumpers, especially for pedestrians, is still quite limited, and there is a lack of protection measures for pedestrians' heads. With the increase in the number of cars owned year by year, the incidence of pedestrian collision accidents is also showing an upward trend.

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