Results 1 - 9 of 9

• Threshold Powers and Delays for Igniting Propane and Butane-Air Mixtures by CW Laser-heated Small Particles
  11/1/2006 - Peer reviewed journal articles
  NIOSH researchers studied laser safety in potentially flammable environments. Researchers measured threshold igniting powers as a function of beam diameter for butane and propane-air mixtures by laser-heating targets placed on optical fiber tips.
• Methane-Air Mixtures Ignited by CW Laser-Heated Targets on Optical Fiber Tips: Comparison of Targets, Optical Fibers, and Ignition Delays
  9/1/2006 - Peer reviewed journal articles
  Researchers conducted experiments to estimate the mean and standard deviation of laser powers needed to ignite 6% methane-air atmospheres using single-mode optical fiber tips covered by two types of iron oxide mixed with a ceramic adhesive.
• Optically Powered Remote Gas Monitor
  1/1/1995 - Reports of Investigations
  Many mines rely on toxic gas sensors to help maintain a safe and healthy work environment. This report describes a prototype monitoring system developed by the USBM that uses light to power and communicate with remote toxic gas sensors.
• Remote Fiber-Optic Methane Monitor
  1/1/1992 - Reports of Investigations
  Reports on the U.S. Bureau of Mines development and testing of an instrinsically safe methane monitor based on differential absorption of infrared light.
• Demonstration of the Ability of Distributed Fiber Optic Sensing Technologies to Enhance Mine Safety
  8/23/2016 - Contracts and cooperative agreements
  A contract to explore early detection of rock movement signaling imminent underground space or pit wall collapse in mines, which has the potential to prevent loss of life and serious injuries from mine disasters.
• Investigation of Ampacity Derating Factors for Shuttle Cars Using Fiber Optics Technology
  10/1/1997 - Conference papers
  A method is described to determine dynamically the conductor temperature of reeled shuttle car cables using fiber optics technology.
• Ignition Tests With a Fiber-Optic Powered Instrument
  9/1/1996 - Conference papers
  New types of industrial instruments use fiber-coupled laser energy to power remote sensors. The U.S. Bureau of Mines began an investigation of laser-powered fiber-optic instruments in explosive atmospheres in support of the standard-making process.
• Hybrid Fiber-Optic Electrochemical Carbon Monoxide Monitor
  1/1/1992 - Reports of Investigations
  The U.S. Bureau of Mines has developed an intrinsically safe carbon monoxide (CO) monitoring system for mines by coupling a fiber-optic data telemetry system with a prototype electrochemical CO monitor.
• The Application of Fiber Optics Technology to the Design of Mine Lighting Systems
  7/1/1986 - Conference papers
  This paper describes Bureau of Mines research and development of a new and innovative mine lighting system based on fiber optics technology.