Trace explosive and narcotics detector and method of use thereof

Abstract

The invention discloses a trace explosive and drug detector and a use method thereof. The detector consists of a micro vacuum pump, a vacuum box, a heating table, a laser Raman spectrometer and a gassensor. The gas sensor is composed of a substrate and a nano-metal particle modified self-crimping micron tube on the substrate. The nano-metal particle modified self-crimping micron tube on the substrate is formed by: firstly utilizing vacuum coating equipment to prepare a multilayer film, and then conducting annealing and self-crimping at an appropriate temperature. When the detector is used fortrace explosive and drug detection, the gas sensor is disposed on the vacuum box heating table. The micro vacuum pump performs air pumping on the vacuum box to suck in trace gaseous molecules in explosives, drugs and other environments, the laser Raman spectrometer is utilized to detect the characteristic Raman peaks of the gaseous molecules, thus realizing detection of explosives, drugs and thelike. And then, heating and vacuum pumping are carried out to discharge the residual gas, and the detector can be used for cyclic measurement or standby use. The detector provided by the invention isexquisite and is ultra-highly sensitive, and is especially suitable for counter-terrorism, reconnaissance and other public safety fields.

Description

technical field [0001] The invention belongs to the application technical field of trace explosives and narcotics detection, and in particular relates to a trace explosives and narcotics detector and a use method. Background technique [0002] With the rapid development of my country's economy, the field of public security has received more and more attention. From airports, stations to squares, large gatherings, etc., it is necessary to check suspicious packages and people to detect possible hidden bombs, drugs and dangerous items. The usual way now is to use police dogs to sniff and use ion mobility spectroscopy to detect and other methods. Among them, police dog detection uses the excellent nasal sensitivity of police dogs to sniff traces of bombs or drugs and other dangerous substances or gas molecules emitted. For tightly packaged dangerous goods, the concentration of trace gaseous molecules emitted is extremely low, and it is difficult for police dogs to sniff them ou...

AI Technical Summary

Problems solved by technology

However, this method is still difficult to directly detect traces of gaseous molecular gases emitted from the surface of tightly wrapped objects; and another problem is that it is difficult to recycle, because once the surface of the nano-metal particles is exposed to the gas ( Including the atmosphere), it is easy to absorb several layers of gas molecules, and the surface is covered by gas molecules, which is difficult to release, so it can only be used once

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