公开(公告)号：US3893112A

公开(公告)日：1975-07-01

申请号：US43492574

申请日：1974-01-21

Applicant: RCA CORP

Inventor： MILLER JEFFREY ELLIS

IPC: G01S13/70 ,  G01S13/93 ,  G01S9/56

CPC classification number: G01S13/70 ,  G01S13/9303

Abstract: A system for comparing with a preset constant a ratio of the average value of a variable to the average value of its time derivative over a specified time interval. The system is embodied in a digital circuit, consisting of counters and logic gates, performing both an averaging function and a ratio comparison function without requiring division by a variable. One embodiment of the system finds particular utility in the field of collision avoidance of airborne vehicles wherein it can be used to give early warning of a potential collision by comparing the time to impact, Tau, (range over range rate) to a preset critical time.

Abstract translation: 一种用于与预定常数比较的系统，该变量的平均值与其在时间间隔上的时间导数的平均值的比率。 该系统体现在由计数器和逻辑门组成的数字电路中，执行平均功能和比率比较功能，而不需要由变量进行除法。 该系统的一个实施例在空中交通工具的碰撞避免领域中具有特别的用途，其中可以将其用于通过将时间与冲击时间（范围超出范围速率）相比预设的临界时间进行比较来给出潜在的碰撞的早期警告 。