Gas detecting circuit and method for security check device

Abstract

The invention provides a gas detecting circuit and method for a security check device, the circuit comprising: a receiver for receiving a gas flow generated by an gas flow generating unit of the security check device, wherein the gas flow includes gas molecules carried by a passing measured person and a redundant gas; a filter for filtering out the redundant gas; a comparator for comparing the gasmolecules carried by the passing measured person with a predetermined gas molecular component, and transmitting a comparison result to a control circuit; and the control circuit configured to generate an alarm signal according to the comparison result. Therefore, the gas detection can be combined into the security check device, which greatly improves the security check efficiency.

Description

technical field [0001] The invention relates to the field of security inspection, in particular to a gas detection circuit and method of security inspection equipment. Background technique [0002] With the development of society, people pay more and more attention to safety issues. Whether it is airports, stations, subways, immigration, courts, prisons, drug rehabilitation centers, detention centers, hospitals, schools, large performance venues, etc., security checks for visitors are essential. [0003] The so-called safety inspection is to check whether there are guns, knives, ammunition and inflammable and explosive dangerous goods in the passengers, live audience and their luggage through certain technical means and facilities, so as to intercept possible dangerous elements and potential safety hazards, and prevent Occurrence of violent criminal activity or accidents. The common security inspection equipment nowadays is the metal detection security inspection equipment...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing gas inspections are large-scale equipment, which are expensive and cumbersome to use

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