Accession Number : ADD013471

Title :   Programmable Fuze.

Descriptive Note : Patent, Filed 3 Apr 81, patented 1 Mar 83,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Yates, Patrick A ; Swenson, Richard M ; Hennings, George N

Report Date : 01 Mar 1983

Pagination or Media Count : 6

Abstract : A programmable fuze for initiating weapon warhead detonation. The deacceleration of the weapon warhead is measured by an accelerometer. The output of the accelerometer is integrated to obtain velocity and subsequently digitized and stored in a microcomputer or microprocessor. A zero-slope detector indicates to the microcomputer microprocessor if the forward velocity component is constant for a given time. This indicates whether the weapon warhead has entered a cavity in the target. The microcomputer or microprocessor has an algorithm programmed into it so that it determines whether certain dynamic variables have exceeded threshold values thus initiating a detonating signal to a firing circuit. The dynamic variables are the distance of travel of the weapon warhead in the target, the transverse velocity component of the weapon warhead in the target, and the number of cavities entered. These four dynamic variables are compared to threshold values such as distance, breakup level, ricochet, and cavity entered. If any one of the given dynamic variables equals or exceeds a given threshold value, the microprocessor signals the detonation of the warhead.

Descriptors :   *ACCELEROMETERS, *EXPLOSIVES INITIATORS, *MICROCOMPUTERS, *MICROPROCESSORS, *PATENTS, ALGORITHMS, CAVITIES, COMPUTER PROGRAMMING, DETONATIONS, DYNAMICS, FIRING CIRCUITS, FUZES(ORDNANCE), OUTPUT, RICOCHET, SIGNALS, THRESHOLD EFFECTS, THRUST, TRANSVERSE, VARIABLES, VELOCITY, WARHEADS, WEAPONS

Subject Categories : Ammunition and Explosives
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE