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Title: No moving parts safe and arm apparatus and method with monitoring and built-in-test for optical firing of explosive systems

Abstract

A laser initiated ordnance controller apparatus which provides a safe and arm scheme with no moving parts. The safe and arm apparatus provides isolation of firing energy to explosive devices using a combination of polarization isolation and control through acousto-optical deviation of laser energy pulses. The apparatus provides constant monitoring of the systems status and performs 100% built-in-test at any time prior to ordnance ignition without the risk of premature ignition or detonation. The apparatus has a computer controller, a solid state laser, an acousto-optic deflector and RF drive circuitry, built-in-test optics and electronics, and system monitoring capabilities. The optical system is completed from the laser beam power source to the pyrotechnic ordnance through fiber optic cabling, optical splitters and optical connectors. During operation of the apparatus, a command is provided by the computer controller and, simultaneous with laser flashlamp fire, the safe and arm device is opened for approximately 200 microseconds which allows the laser pulse to transmit through the device. The arm signal also energizes the laser power supply and activated the acousto-optical deflector. When the correct fire format command is received, the acousto-optic deflector moves to the selected event channel and the channel is verified to ensuremore » the system is pointing to the correct position. Laser energy is transmitted through the fiber where an ignitor or detonator designed to be sensitive to optical pulses is fired at the end of the fiber channel.« less

Inventors:
Publication Date:
Research Org.:
Allied-Signal, Inc., Kansas City, MO (United States). Bendix Kansas City Div.
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
453528
Patent Number(s):
PATENTS-US-A8257316
Application Number:
ON: DE97003807; PAN: 8-257,316; TRN: AHC29707%%98
Assignee:
US Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
AC04-76DP00613
Resource Type:
Patent Application
Resource Relation:
Other Information: PBD: 1994
Country of Publication:
United States
Language:
English
Subject:
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; WEAPONS; COMPUTERIZED CONTROL SYSTEMS; LASER RADIATION; IGNITION; SOLID STATE LASERS; RF SYSTEMS; EXPLOSIVES; DETONATORS

Citation Formats

Hendrix, J L. No moving parts safe and arm apparatus and method with monitoring and built-in-test for optical firing of explosive systems. United States: N. p., 1994. Web.
Hendrix, J L. No moving parts safe and arm apparatus and method with monitoring and built-in-test for optical firing of explosive systems. United States.
Hendrix, J L. 1994. "No moving parts safe and arm apparatus and method with monitoring and built-in-test for optical firing of explosive systems". United States. https://www.osti.gov/servlets/purl/453528.
@article{osti_453528,
title = {No moving parts safe and arm apparatus and method with monitoring and built-in-test for optical firing of explosive systems},
author = {Hendrix, J L},
abstractNote = {A laser initiated ordnance controller apparatus which provides a safe and arm scheme with no moving parts. The safe and arm apparatus provides isolation of firing energy to explosive devices using a combination of polarization isolation and control through acousto-optical deviation of laser energy pulses. The apparatus provides constant monitoring of the systems status and performs 100% built-in-test at any time prior to ordnance ignition without the risk of premature ignition or detonation. The apparatus has a computer controller, a solid state laser, an acousto-optic deflector and RF drive circuitry, built-in-test optics and electronics, and system monitoring capabilities. The optical system is completed from the laser beam power source to the pyrotechnic ordnance through fiber optic cabling, optical splitters and optical connectors. During operation of the apparatus, a command is provided by the computer controller and, simultaneous with laser flashlamp fire, the safe and arm device is opened for approximately 200 microseconds which allows the laser pulse to transmit through the device. The arm signal also energizes the laser power supply and activated the acousto-optical deflector. When the correct fire format command is received, the acousto-optic deflector moves to the selected event channel and the channel is verified to ensure the system is pointing to the correct position. Laser energy is transmitted through the fiber where an ignitor or detonator designed to be sensitive to optical pulses is fired at the end of the fiber channel.},
doi = {},
url = {https://www.osti.gov/biblio/453528}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}