| 摘要 |
The invention relates to a device and a method for remotely detecting a non-infrared active target gas at a target location where the target gas can be found, comprising an excitation laser 4 for emitting an excitation laser beam 5 which can be deflected towards at least two target locations Oi, Oi+1, comprising a detector 6 for detecting a radiation 16 originating from the respective target location Oi, Oi+1, comprising a control device for controlling the excitation laser 4, and comprising an analyzing device for analyzing output signals of the detector 6 dependent on the respective target location Oi, Oi+1 and in correlation with the excitation laser beam 5 emitted from the excitation laser 4. A reliable and safe detection of the target gas 1 is achieved in that the excitation laser 4 is designed to emit an infrared excitation laser beam 5, the wavelength of which can be matched to the wavelength of an infrared-active background gas 3 absorption line in the infrared region, said background gas being located in the surroundings of the respective target location Oi, Oi+1; a radiation which can be influenced on the basis of the excitation of the background gas 3 can be measured using the detector 6; and values can be displayed by the analyzing device using the output signals of the detector 6, wherein the values correlate to the concentration of the background gas at the respective target location Oi, Oi+1, and properties of a target gas 1 present at the respective target location Oi, Oi+1 can be ascertained from the values. |
