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US 2020/0080826 A1Published application
Accurate range-to-go for command detonation
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsMichael J. CHOINIERE, Bruce WINKER
Life of this patent
Estimating the term…
Abstract
The system and method for accurately determining range-to-go for the command detonation of a projectile. Using dual laser and/or radio frequency detectors on the tail and on the nose of a spinning projectile to determine the range-to-go, time-to-go, or lateral offset from the projectile to the target.
Claims12
A method for guiding a projectile, comprising:
- providing a projectile comprising a tail portion and a nose portion;
- detecting a first laser or radio frequency signal via a rear-facing detector mounted on the tail portion of the projectile;
- determining a first time at which the first laser or radio frequency signal is detected via the detector mounted on the tail portion of the projectile;
- detecting a second laser or radio frequency signal via a detector mounted on the nose portion of the projectile, the second laser or radio frequency signal being the first laser or radio frequency signal that has reflected off a target;
- determining a second time at which the second laser or radio frequency signal is detected via the detector mounted on the nose portion of the projectile;
- comparing the first time to the second time to determine a time delay;
- determining an azimuth and an elevation of the projectile based on the detection of the first laser or radio frequency signal via the detector mounted on the tail portion of the projectile;
- and
- determining one or more of the following using the time delay between detection by the first detector and detection by the second detector:
- a lateral offset between the projectile and the target;
- a time-to-go for the projectile to reach the target;
- and a range-to-go for the projectile to reach the target.
9 more elements
A guided projectile, comprising;
- a tail sensor located on a tail portion of the guided projectile for detecting a laser or radio frequency signal;
- a forward sensor located on a forward portion of the guided projectile and detecting a reflected laser or radio frequency signal from a target;
- a computer readable storage device having instructions, which when executed by a processor, cause the processor to execute:
- determining a first time at which the laser beam is detected via the tail detector;
- determining a second time at which the reflected signal is detected via the front detector;
- comparing the first time to the second time to determine a time delay;
- determining an azimuth and an elevation of the guided projectile based on the detected laser or radio frequency signal by the tail detector;
- and
- determining one or more of the following using the time delay between detection by the tail detector and detection by the front detector:
- a lateral offset between the projectile and the target;
- a time-to-go for the projectile to reach the target;
- and a range-to-go for the projectile to reach the target.
9 more elements
Dependencies are inferred from the claim text.