Microwave Radiometers for Fire Detection in Trains: Theory and Feasibility Study†
AbstractThis paper introduces the theory of fire detection in moving vehicles by microwave radiometers. The system analysis is discussed and a feasibility study is illustrated on the basis of two implementation hypotheses. The basic idea is to have a fixed radiometer and to look inside the glass windows of the wagon when it passes in front of the instrument antenna. The proposed sensor uses a three-pixel multi-beam configuration that allows an image to be formed by the movement of the train itself. Each pixel is constituted by a direct amplification microwave receiver operating at 31.4 GHz. At this frequency, the antenna can be a 34 cm offset parabolic dish, whereas a 1 K brightness temperature resolution is achievable with an overall system noise figure of 6 dB, an observation bandwidth of 2 GHz and an integration time of 1 ms. The effect of the detector noise is also investigated and several implementation hypotheses are discussed. The presented study is important since it could be applied to the automatic fire alarm in trains and moving vehicles with dielectric wall/windows. View Full-Text
Share & Cite This Article
Alimenti, F.; Roselli, L.; Bonafoni, S. Microwave Radiometers for Fire Detection in Trains: Theory and Feasibility Study. Sensors 2016, 16, 906.
Alimenti F, Roselli L, Bonafoni S. Microwave Radiometers for Fire Detection in Trains: Theory and Feasibility Study. Sensors. 2016; 16(6):906.Chicago/Turabian Style
Alimenti, Federico; Roselli, Luca; Bonafoni, Stefania. 2016. "Microwave Radiometers for Fire Detection in Trains: Theory and Feasibility Study." Sensors 16, no. 6: 906.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.