A kind of infrared body temperature screening system refrigeration infrared detector test method

Abstract

The invention discloses a cooling-type infrared detector testing method for an intelligent infrared body temperature screening system, comprising: an area source black body (1), optics (2), a tested detector (3), a detector drive circuit (4), a test Use a computer (5). The drive circuit (4) provides bias voltage for the detector under test, and converts the analog voltage signal output by the detector into a digital image in CameraLink format and transmits it to the test computer (5). The test computer processes digital images, calculates the detector’s noise equivalent temperature difference (NETD), blind element rate, response rate, and non-uniformity indicators, and has a median filter function, which is aimed at the environment and black body required for testing and screening body temperature ( target) temperature, conduct a targeted screening of the detectors through a fixed method, and upload the image data of the qualified detectors to the host computer of the body temperature screening system. The invention has the characteristics of convenient operation and effective screening of test detectors, which can increase the test speed and reduce the cost of cooling type infrared detectors.

Description

technical field [0001] The invention relates to the field of body detector testing and screening, in particular to a detector screening method in an intelligent infrared body temperature screening system. Background technique [0002] Body temperature screening is often required in public places such as stations, airports, hospitals, ports, and schools, and it is more important to identify people with fever, especially in the case of an epidemic. At present, most infrared body temperature testing devices use hand-held temperature measuring guns or uncooled infrared detection devices. Although the price is low, the former has low efficiency, can only measure a single person, and has poor accuracy. The latter has poor stability, poor accuracy, and is greatly affected by environmental factors. An intelligent infrared body temperature screening system adopts a cooled infrared thermal imager, which has good stability and high precision, and adopts a unique algorithm, which can m...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a detector testing method for an infrared body temperature screening system, which solves the problems that the detector testing process in general infrared systems is cumbersome and the price of cooling infrared detectors remains high

Images