Concealed dangerous articles detection method and device

摘要

A method and an apparatus for detecting hidden hazardous substance including the steps of: performing terahertz imaging for a detected object; judging whether there is a suspicious area containing the hidden hazardous substance in a terahertz image of the detected object obtained by the terahertz imaging; performing a multi-wavelength spectroscopy measurement to the suspicious area, determining whether the hazardous substance is contained in the suspicious area according to results of multi-wavelength spectroscopy measurement; and outputting the image of the detected object and hazardous substance detecting result. Also disclosed is an apparatus for implementing the method for detecting the hidden hazardous substance according to the present invention. Determination of the hidden hazardous substance can be performed from the perspectives of shape features and substance composition, thus the accuracy of detection is greatly increased.

主权项

1. A method for detecting hidden hazardous substance, comprising the following steps:
producing wavelength tunable continuous wave terahertz radiation for irradiating a detected object and interacting with the object by a terahertz emitting device; receiving terahertz radiation reflected back from the detected object by a terahertz detector; collimating a wave beam produced by the terahertz emitting device and focusing the wave beam to the detected object, meanwhile, collecting a terahertz wave beam reflected back from the detected object to the terahertz detector by a terahertz optical assembly; adjusting a spatial position of the terahertz wave beam incident to the detected object by a wave beam scanning control system; and controlling coordination of the terahertz emitting device, the terahertz detector and the wave beam scanning control system in an apparatus, building a terahertz reflection image of the detected object, judging whether there is a suspicious area containing hazardous substance in the terahertz reflection image based on shape characteristics and gray-scale value characteristics obtained by the terahertz reflection image, searching and locating the suspicious area, performing analysis and processing for multi-wavelength reflection spectrum data of measurement points of interest in the suspicious area, and presenting a hazardous substance identifying result by a data acquisition and processing system.