PurposeIt is in the interest of any gas company to maintain the value of its pipelines and to protect them effectively against damage caused by third parties. Aims to address this issue.Design/methodology/approachAs a result of global progress in high‐resolution remote sensing and image processing technology, it is now possible to design natural gas pipeline monitoring systems with remote sensors and context‐oriented image processing software.FindingsRecent developments in UAV technology show that UAVs provide the appropriate platforms for a remote sensing‐based inspection system: appropriate small and medium size UAV have been developed, their operation is technically feasible in an controlled as well as in uncontrolled airspace.Research limitations/implicationsThe data and information processing system still has to be developed to an operational standard. A total operational system consisting of UAV platform, sensors, data processing and alarm detection has to be demonstrated in a complete mission. The certification and operation standards for a safe and efficient operation of UAVs do not yet exist.Originality/valueTwo different scenarios for a UAV‐based gas pipeline monitoring system are discussed.
We report on a method for characterizing the tuning capabilities of small-bandwidth external-cavity diode lasers. The step response of a piezo-driven Littman-Metcalf external-cavity diode laser and the compensation of its optoelectromechanical frequency response is investigated. When an approximately 50-V compensated Gaussian pulse is applied to the piezo element, a detuning of 13.6 GHz is observed. This modification of the laser is useful for several spectroscopical applications and as a tunable seed laser for lidar applications.
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