40results about How to "Increased scattering intensity" patented technology

The invention belongs to the technical field of public safety, and particularly discloses a trace explosive and poison detector and a using method thereof. The trace explosive and poison detector comprises a miniature vacuum pump, a vacuum box, a heating table, a laser Raman spectrometer and a gas sensor. The gas sensor comprises a substrate and a self-curled micron tube and the self-curled microntube is arranged on the substrate and is modified by nanometer metal particles; multilayer thin films are prepared by the aid of vacuum film coating equipment and then are annealed and self-curled atthe appropriate temperatures to obtain the self-curled micron tube. The trace explosive and poison detector and the method have the advantages that the gas sensor is arranged on the vacuum box and the heating table when the trace explosive and poison detector is used for detecting trace explosive and poison, air in the vacuum box is exhausted by the miniature vacuum pump, trace gaseous moleculesin environments with the explosive, the poison and the like can be sucked, characteristic Raman peaks of the gaseous molecules can be detected by the laser Raman spectrometer, and accordingly the explosive, the poison and the like can be detected; residual gas can be heated, vacuumized and removed, circulation measurement can be carried out, or the trace explosive and poison detector can be idle for standby application; the trace explosive and poison detector is exquisite in structure, ultrahigh in sensitivity and applicable to the field of public safety of anti-terrorism, reconnaissance and the like.