飞机座椅安全带状态报警电路设计

摘要

飞机座椅安全带能够承受足够的载荷以抵抗巨大的冲击力，起到保护乘客的作用。但部分乘客容易疏忽在正常飞行中系好安全带，而现今飞机上并没有相应的安全带报警装置来约束每一位乘客主动扣紧安全带。使用传感器技术可以提高安全带的使用率。介绍了飞机座椅安全带状态报警电路的设计，并利用电流互感器作为安全带开路报警传感器，计算了电流互感器的参数。同时，利用RS-485总线实现上位机与从机单片机的通信和集中显示，组成报警系统，提高飞机乘客的安全性。%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.