US 9,317,477 B1Granted

Method for transferring 16-bit data through 8-bit devices

AssigneeThe United States of America as represented by the Secretary of the Army

InventorsLloyd D. Khuc, Barry Schwartz, Jason Cahayla, Triet La, Robert P. Bryan, John Geaney, Olivier Nguyen

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Abstract

A computer program product corrects a detonation time from a ballistic table, based on the actual velocity of a projectile measured upon exit of the projectile from the gun tube. The computer program product transfers a 16-bit data stream, through a 16-bit to an 8-bit encoder, to a fuze controller implemented as an 8-bit platform, to provide precise timing adjustment to a fuze controller. The computer program product significantly improves the accuracy of detonation times for air burst mode. The encoder calculates the absolute truncated, square rooted, X, of the input time delay number, as well as the error correction number, Y. The encoder then transmits both numbers X and Y as an 8-bit data stream, optionally along with the parity data to the fuze controller.

Claims1

Dependent claims

A method for transferring a 16-bit exit velocity, T, of a projectile from a gun barrel, to an 8-bit fuze controller within the projectile, in order to adjust the detonation delay of the fuze, the method comprising:

a. a sensor module that measures the exit velocity, T, of the projectile from the gun barrel and sends a 16-bit data stream of that measurement to an encoder;
b. which encoder divides the 16-bit data stream of the exit velocity into two 8-bit data streams (X,Y);
c. the first part, X, of the two 8-bit data streams is calculated by the encoder to be equal to T1/2 truncated to an 8-bit integer;
d. the second part, Y, of the two 8-bit data streams is calculated by the encoder to be an 8-bit square root error value equal to T minus the calculated 8-bit integer squared;
e. both 8-bit data streams (X,Y) are input to a fuze controller, which then calculates the exit velocity T as the integer, X, squared, plus the 8-bit square root error value;
f. the fuze controller then calculates the detonation delay of the projectile.

3 more elements

Dependencies are inferred from the claim text.