Method for testing refrigeration type infrared detector of infrared body temperature screening system

Abstract

The invention discloses a method for testing a refrigeration type infrared detector of an intelligent infrared body temperature screening system. A test module comprises a surface source black body (1), optics (2), a detected detector (3), a detector driving circuit (4) and a test computer (5). The driving circuit (4) provides bias voltage for the detected detector, converts an analog voltage signal output by the detector into a Camera Link format digital image and transmits the Camera Link format digital image to the test computer (5). The test computer processes a digital image, calculates indexes of noise equivalent temperature difference (NETD), blind pixel rate, response rate and non-uniformity of the detector, has a median filtering function, conducts targeted screening on the detector through a fixation method according to the environment and the black body (target) temperature required for body temperature testing and screening, and uploads image data of the detector qualifiedin troubleshooting to an upper computer of the body temperature screening system. The method has the advantages of being convenient to operate and capable of effectively screening and testing the detector, the testing speed can be increased, and the cost of the refrigeration type infrared detector is reduced.

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] Public places such as stations, airports, hospitals, ports, and schools often need to conduct body temperature screening to find out people with fever, especially when there is an epidemic. Body temperature screening is more important. At present, infrared body temperature testing devices mostly use hand-held temperature measuring guns or uncooled infrared detection devices. Although the price is lower, the former has low efficiency, can only measure a single person, and has poor accuracy. The latter has poor stability, poor precision, and is greatly affected by environmental factors. An intelligent infrared body temperature screening system uses a cooling infrared thermal imager with good stability and very high precision, and uses a unique a...

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

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