Weight sensor

    Used in smart airbag systems. Smart airbags add sensors to the common type to detect whether the occupants on the seat are children or adults, their seat belts and the height of their positions. These data are collected by the computer. The software analyzes and controls the expansion of the airbag to make it play the best role, avoid unnecessary expansion of the airbag, thereby greatly improving its safety function. Smart airbags have two more core components than ordinary airbags, namely the sensor and its supporting computer software. The sensors currently in use mainly include: weight sensors, which sense whether there is a person, whether it is an adult or a child, according to the weight on the seat; electronic area sensors. It can generate a low-energy electronic area in the cab, and measure the current passing through the area to determine the presence and position of the occupants; infrared sensors detect the presence of people based on heat to distinguish them from inanimate things; optical sensors. For example, the same camera looks at the seat and compares it with the stored image of the empty seat to determine the presence and position of the human body; the ultrasonic sensor detects the occupant’s status by transmitting ultrasonic waves and analyzing the reflected waves after encountering objects. Presence and location. Another important task in the design and development of smart airbags is to compile computer software.

    Generally speaking, computer software should be able to determine the size and weight of the occupant, whether the seat belt is fastened, the position of the person on the seat, the speed of the vehicle at the time of the collision, and The degree of impact, etc., and respond in an instant, adjust the timing, speed and degree of airbag inflation, so that the airbag can provide the most reasonable and effective protection for passengers, especially to reduce the damage to children and other short-sized people.