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

A noise equivalent temperature difference, infrared camera technology, applied in the field of optical detection, can solve the problems of poor accuracy, inability to obtain, inability to obtain the NETD value of the infrared camera, etc., to achieve the effect of improving measurement accuracy, accurate measurement and calculation

Inactive Publication Date: 2015-06-17
BEIJING INST OF ENVIRONMENTAL FEATURES
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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 ca

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

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[0024] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is for the purpose of illustration only, and in no way limits the invention and its application or usage.

[0025] 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 accuracy of the effective operating distance. Since infrared radiation is a kind of thermal radiation, the temperature has a greater influence on the NE...

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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...

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Application Information

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IPC IPC(8): G01M11/00
Inventor 戴映红张亚洲董雁冰雷浩郁云生
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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