Method and device for measuring surface infrared emissivity of aircraft coating
A technology of infrared emissivity and measuring devices, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high requirements and inapplicability to practical application in the field, and achieve the effect of easy identification, coating damage and measurement of damage degree
Pending Publication Date: 2022-03-25
AIR FORCE UNIV PLA
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Problems solved by technology
Although this method can realize non-contact measurement, the measurement is accurate and the measurement area is large, but because it uses a black body radiation source to simulate environmental radiation, it has high requirements for equipment and measurement environment, and is not suitable for practical application in the field
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[0069] The surface infrared emissivity measurement device of the aircraft coating includes an infrared detector 1, a radiator 2, a platform 3, a processor 5 and a data line 4, such as figure 1 shown.
[0070] like figure 1 As shown, the infrared detector 1 is located on the radiator 2, the infrared detector 1 and the radiator 2 are fixed on the platform 3, the infrared detector 1 and the radiator 2 are connected to the processor 5 through the data line 4 and transmit data Signal.
[0071] The measurement band of infrared detector 1 is Δλ, Δλ is in the range of 3-5 μm, the frame pixel is 640×512, the frame rate is 25Hz, the integration time is 4490μs, and the output mode is infrared radiance.
[0072] The specific emissivity of the radiator 2 is 0.93-0.98, and the direction of the radiation is consistent with the direction facing the infrared detector 1, both facing the direction of the aircraft coating 6 to be tested.
[0073] The platform 3 can move horizontally on the g...
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Abstract
The invention discloses a device for measuring the surface infrared emissivity of an aircraft coating. The device comprises an infrared detector, a radiator, a platform, a processor and a data line, the method for measuring the surface infrared emissivity of the aircraft coating comprises the steps of setting a calibration plate, arranging an infrared emissivity measuring device, collecting an infrared radiation brightness value A under a natural environment condition, collecting an infrared radiation brightness value B under a radiation condition, solving average environment infrared radiation brightness under the natural environment condition, and calculating the surface infrared emissivity of the aircraft coating. Solving the average equivalent environment infrared radiation brightness under the active radiation condition, solving the average infrared radiation brightness at each pixel point of the coating area of the aircraft to be detected under the natural environment condition, solving the average infrared radiation brightness at each pixel point of the coating area of the aircraft to be detected under the active radiation condition, and solving the coating area of the aircraft to be detected at 3-10 degrees and drawing a surface infrared emissivity diagram of the aircraft coating according to the infrared emissivity at the waveband of 5mum and 5mum. The method is suitable for measuring the surface infrared emissivity of the coating of the aircraft parked in the external field.
Description
technical field [0001] The invention belongs to the technical field of infrared emissivity detection, and in particular relates to a method and a device for measuring the surface infrared emissivity of an aircraft coating. Background technique [0002] Infrared low-emissivity coating, also known as infrared stealth coating, is generally coated on the surface of high-temperature objects to reduce the infrared radiation energy of the object to achieve infrared stealth. In the process of use, it is prone to damage such as aging, scratches, wear, and shedding. Infrared emissivity is an important performance parameter to measure the performance of infrared low-emissivity coatings. The damage of coatings leads to changes in its infrared emissivity, which seriously affects its infrared stealth performance. By measuring the infrared emissivity of the coating, the damaged part of the coating can be detected and the degree of coating damage can be known, which is of great significance...
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IPC IPC(8): G01N21/01G01N21/3563
CPCG01N21/01G01N21/3563
Inventor李益文张浦幼森李瑶陈戈化为卓李玉琴焦朝强
OwnerAIR FORCE UNIV PLA