Portable Terahertz remote sensing detector and remote detection method

Abstract

The invention discloses a portable Terahertz remote sensing detector and a remote detection method. The detector comprises a signal generating device, a detector, a processor and an imaging display device, wherein the signal generating device comprises a Terahertz wave radiation source, a broadband tunable laser and a plasma generator; and the detector comprises a receiving element, a detecting element and a signal modulation circuit. The detection method comprises the following steps of: 1, dividing scanning subregions and pixel points and encoding scanning output frequencies of various scanning subregions; 2, arranging an assembly and generating a remote detection signal; 3, performing two-dimensional scanning; and 4, performing signal analysis processing, namely rapidly imaging and generating a Terahertz wave image with frequency spectrum characteristics, identifying a material type of a tested object, generating a charge coupled device (CCD) image and identifying the shape of the tested object. The detector is reasonable in design, easy to operate, flexible in detection mode, wide in application range and good in detection effect, and can fulfill the aims of rapidly imaging and remotely detecting by combining THz and induced fluorescence spectrum analysis with space imaging.

Description

technical field [0001] The invention belongs to the technical field of terahertz wave and laser-induced fluorescence detection, and in particular relates to a portable terahertz remote sensing detector and a remote detection method. Background technique [0002] Terahertz (THz, 1THz=10 12 Hz) waves refer to electromagnetic waves with a radiation frequency of 0.1THz-10THz. Terahertz waves have the following characteristics: First, the wave band of terahertz waves is located between microwaves and infrared light, and belongs to the category of far infrared rays and submillimeter waves; it can penetrate deep into many organic materials without harming materials, and is suitable for many dielectric substances. It has good penetrability with non-polar liquids, and can detect opaque objects through perspective; its photon energy is very low, and it is safe for living organisms, which makes terahertz imaging very suitable for biological sample detection and safety detection; Seco...

AI Technical Summary

Problems solved by technology

However, how to organically combine the fluorescence of laser-induced plasma radiation with terahertz waves to realize terahertz wave remote sensing has not been reported at home and abroad, and there is no report on a practical terahertz wave and fluorescence remote sensing detection instrument. and remote detection methods

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