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

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Description

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 ... continued below

Physical Description

21 p.

Creation Information

Hendrix, J.L. December 31, 1994.

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Description

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.

Physical Description

21 p.

Notes

OSTI as DE97003807

Source

  • Other Information: PBD: 1994

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  • Other: DE97003807
  • Report No.: PATENTS-US--A8257316
  • Grant Number: AC04-76DP00613
  • Office of Scientific & Technical Information Report Number: 453528
  • Archival Resource Key: ark:/67531/metadc687299

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • December 31, 1994

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

Description Last Updated

  • Dec. 3, 2015, 4:35 p.m.

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Citations, Rights, Re-Use

Hendrix, J.L. No moving parts safe and arm apparatus and method with monitoring and built-in-test for optical firing of explosive systems, patent, December 31, 1994; United States. (digital.library.unt.edu/ark:/67531/metadc687299/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.