一种电子封记的设计与实现

Design and realization of Electronic Seal

论述了一新型电子封记的原理及其FPGA设计。这种电子封记具有"使用控制"和"位置激活"功能,可用于特种货物活动范围的授权控制。其使用控制功能的实现,借鉴了抗干涉齿轮集(CMG)机构的密码鉴别原理。其位置激活功能的实现,采用环形FIFO实现目标位置的装定,通过与GPS接收机实时获取的空间坐标实时比较,判断是否越界。通过modelsim软件仿真,验证了系统设计的可行性。

the theory and FPGA implement of a new type of seals was proposed in the paper, which have functions of ＂ user control＂ and ＂ position activation＂ and can be applied in the control of authorization of special cargo ＇s s using scope, the Password recognition strategy, Counter Meshing Gears （CMG） mechanism, is adopted in the design of ＂use control＂, In the design of＂ position activation＂, a ring-like FIFO is used to storage the location parameters of certain target which, are compared with the real-time space coordinates from a GPS receiver and the result is used to judge whether the cargo has cross the border, The modelsim simulation verifies the feasibility of the system design.