Analysis of Safety Sensors for Explosion-Proof High-Energy Igniters

1. The primary components of the seat belt tensioner

 Explosion-Proof High-Energy IgnitersThe restraint is mainly composed of an igniter, a gas generator, and a tensioning device.

Igniter: The power side circuit of the igniter is controlled by the safety sensor within the airbag ECU. The airbag ECU then issues a点火 command to the driver circuit based on the signals from various sensors to determine the collision severity and control the state of the igniter's ground circuit.

Remote-Controlled Ignition Lock with Retractable Electric Seat Belt

(2) Gas Generator: The structure and principle of the gas generator for airbags are essentially the same, only smaller in size and with a minimal amount of inflation agent used.

(3) Common types of tightening devices include ratchet and pawl, rack and pinion, and ball chain ratchet, etc.

Gear and rack-type seat belt tensioner

The ratchet mechanism is set at one end of the seat belt's retractable reel, consisting of three ratchets, one outer toothed ring, and a spring.High-Energy Ignition DeviceThe external toothed ring is fixed on the rotating shaft of the retractable reel of the seatbelt, allowing it to rotate along with the shaft. When the steel wire rope is stationary, the pawl is in a relaxed state under the action of the spring, and the external toothed ring can rotate with the seatbelt reel. When the steel wire rope is pulled, the pulling force overcomes the spring force, causing the pawl to engage with the teeth of the external toothed ring, and it drives the seatbelt reel to rotate a certain angle, thereby tightening the seatbelt.