Multistage control system and method of automobile safety airbag

Abstract

The invention discloses a multistage control system and method of an automobile safety airbag. The multistage control system comprises a thin film pressure sensor and a controller; the thin film pressure sensor is located on an automobile seat and used for collecting pressure applied by a passenger on the automobile seat; the thin film pressure sensor is electrically connected with the controller,the controller is used for judging the body type interval of the passenger according to the pressure collected by the thin film sensor and sending a judgment result to the an airbag control system, and the airbag control system is used for controlling the different detonation degrees of airbags corresponding to different body type intervals. The multistage control system and method can improve the judgment accuracy of passenger body types, and when an accident occurs, a vehicle control system or the airbag control system can control the detonation degree of the multistage airbags according tothe body types of different passengers.

Description

technical field [0001] The invention relates to the technical field of safety airbag control, in particular to a multi-level control system and method for automobile safety airbags. Background technique [0002] The current car seat belts and car airbags have been widely used, which greatly reduces the casualty rate when traffic accidents occur. The safety airbag of the vehicle may cause secondary collision injury to children and petite adults. The airbag should identify different types of occupants from children to adults and child seats, provide effective protection in the event of a collision, and control the opening degree of the safety airbag. The existing methods for detecting the status of the occupant include: visual inspection: that is, to judge the size of the occupant by scanning the overall body contour of the occupant; detection of the pressure height of the backrest: that is, to deduce the size of the occupant by detecting the height of the occupant’s contact ...

AI Technical Summary

Problems solved by technology

The existing methods for detecting the status of the occupant include: visual inspection: that is, to judge the size of the occupant by scanning the overall body contour of the occupant; detection of the pressure height of the backrest: that is, to deduce the size of the occupant by detecting the height of the occupant’s contact with the backrest; but the above two methods are limited. The detection result is inaccurate due to the influence of the occupant's sitting posture and the influence of the environment inside the car, such as light, so the method of gravity induction detection is generally used now: that is, the detection is performed by the threshold switch sensor, that is, when the weight of the occupant reaches a certain threshold, the sensor is triggered and the sensor is activated. After being triggered, the airbag can be detonated in the event of an accident, but the occupant may not be driving according to the normal sitting posture or the occupant is small in size, and the full detonation of the airbag may cause secondary injury to the occupant

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