The seat belts on airplanes can withstand sufficient loads to resist huge impact for protecting passengers. Some of the passengers may often neglect to fasten seat belts in normal flights. However, at present, corresponding seat belt warning devices have not been equipped on the airplanes to constraint every passenger to actively fasten his or her seat belt. Using sensor technology can increase the usage rate of seat belts. The design of the status alarming circuit for airplane seat belts is introduced;the current transformer is adopted as the open loop alarm sensor for the seat belt, the parameters of the current transformer are calculated. Through RS-485 bus, the communication for host computer and slave single chip machines can be implemented to construct alarm system for centralized display; the security of passengers on the airplanes can be enhanced.
NETL
NSTL
维普
万方数据
