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

Patent metadata

Field	Value
Publication number	US-9317477-B1
Application number	US-201213445248-A
Country	US
Kind code	B1
Filing date	Apr 12, 2012
Priority date	Apr 12, 2012
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

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.

First claim

What is claimed is:

1. 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 T 1/2 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.

Assignees

• Khuc Lloyd D
• Schwartz Barry
• Cahayla Jason
• La Triet
• Bryan Robert P
• Geaney John
• Nguyen Olivier
• Us Army

Inventors

• Khuc Lloyd D
• Schwartz Barry
• Cahayla Jason
• La Triet
• Bryan Robert P
• Geaney John
• Nguyen Olivier

Classifications

• G06F17/10 Primary

  Complex mathematical operations {(function generation by table look-up G06F1/03; evaluation of elementary functions by calculation G06F7/544)} · CPC title

• F42C17/04

  for electric fuzes · CPC title

• H03M7/24 Primary

  Conversion to or from floating-point codes · CPC title