CWA stand-off detection, a new figure-of-merit: the field surface scanning rate

A Study on the Deployment of Mesoscale Chemical Hazard Area Monitoring Points by Combining Weighting and Fireworks Algorithms

“…Gas telemetry has been developed for decades and does not require direct contact with the target to track, detect, identify, and estimate concentrations in regions [14,15]. The long-distance telemetry technology developed at this stage is divided into passive telemetry technology, such as Fourier transform infrared spectroscopy [16][17][18][19], and active telemetry technology, such as differential absorption lidar (DIAL) technology [20][21][22][23], Raman scattering spectrum technology [24][25][26][27][28], etc. Longdistance telemetry has non-contact remote detection capability for continuous wave media, which can meet the requirements of remote monitoring, and its strong flexibility is more in line with the requirements of monitoring chemical hazard areas at the medium scale, which can achieve the goal of real-time online remote monitoring and early warning, to a certain extent.…”

Effect of the dual library on long-range (3 km) SF 6 (Hexafluoride Sulfur) detection efficiency by portable Stand-off FTIR (Fourier Transform Infrared) detector

“…In particular, ion mobility spectrometry (IMS), [1,2] differential mobility spectrometry (DMS), [3,4] gas chromatography-mass spectrometry (GC-MS) [5,6] Raman spectroscopy [7,8,9], and active/passive Fourier transform-infrared (FTIR) spectroscopy [10,11,12] have been studied. Among the various technologies, stand-off passive FTIR detectors have attracted much interest as a veri ed technology for real-time chemical gas monitoring systems in industries [13], environmental monitoring [14], and the military [15]. Moreover, passive FTIR enables the acquisition of comprehensive real-time spectrum data providing numerous advantages to users, such as rapid response without exposure to toxic gas and multi-detection of various chemical species.…”

“…In this regard, several portable passive FTIR devices under 6-8 kg have been developed by miniaturizing the hardware system. [15,16]. However, this miniaturization limits the optical throughput and exhibits a low resolution (4-6 cm − 1 ) associated with the developed passive FTIR detector.…”