Measuring device and method for noise equivalent temperature differences of infrared camera in different environments

Abstract

The invention relates to a measuring device and method for noise equivalent temperature differences (NETD) of an infrared camera in different environments. The measuring device comprises a black-body radiation unit, an image transformation unit, a temperature control unit, an environmental simulation unit and a data processing unit. The temperature control unit communicates with the environmental simulation unit and controls the environment temperature of the environmental simulation unit; air holes in the environmental simulation unit are connected with a high-purify argon gas source. By means of the measuring device for noise equivalent temperature differences (NETD) of the infrared camera in different environments, different temperature environments in a field environment can be simulated for conducting NETD tests, NETD measuring results of different temperature environments are obtained, so that the effective action distance of the infrared camera is measured and calculated accurately, and the measuring accuracy of the infrared camera in the field environment is improved.

Description

technical field [0001] The invention relates to the field of optical detection, in particular to a device and method for measuring the noise equivalent temperature difference of an infrared camera under different environments. Background technique [0002] The technical background related to the present invention will be described below, but these descriptions do not necessarily constitute the prior art of the present invention. [0003] In the process of using an infrared camera to measure the infrared radiation characteristics of a target in the field, it is often necessary to first calculate and measure the effective operating distance of the infrared camera, and then estimate the measuring distance of the infrared camera based on the effective operating distance. Generally, the measuring distance of the infrared camera should be smaller than the effective working distance. The noise equivalent temperature difference NETD is a key parameter that affects the calculation a...

AI Technical Summary

Problems solved by technology

Since the ambient temperature in the natural environment is in the range of -20 ~ 40 °C, the temperature difference is large, and infrared radiation is a kind of thermal radiation, so the temperature has a great influence on the measurement results of NETD during field measurement

[0004] Traditional NETD measurement devices and methods cannot obtain the NETD values ​​of infrared cameras at different ambient temperatures, and the accuracy of infrared cameras in field measurements is poor

[0005] Therefore, there is a need in the prior art for a solution that can solve the problem that the infrared camera has poor accuracy when performing field measurements due to the inability to obtain the NETD values ​​of the infrared camera at different ambient temperatures.

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