Three-waveband target surface temperature inversion method

Abstract

The invention provides a three-waveband target surface temperature inversion method. The method comprises the steps of firstly, determining an output value-radiance curve of an infrared photoelectricsystem through calibration, then obtaining a target gray level image and a gray level value through the infrared photoelectric system, measuring the atmospheric transmittance and path radiation of anobservation path by an atmospheric optical parameter measurement system, and obtaining the radiance of three wave bands of a target through calculation; measuring the emissivity of the target surfacematerial at different temperatures of the three wave bands, establishing an emissivity-temperature curve, establishing an equation by utilizing a Planck formula, and calculating to obtain the invertedsurface temperature of the target at the three wave bands; and finally, calculating the proportion of the radiance of each wave band of the target in the total radiance and the ratio of the sum of the radiance of the three wave bands to the sum of the proportions to serve as the total radiance of the target, and solving to obtain the surface temperature of the target. According to the method, temperature inversion errors of three wave bands are fused, the surface temperature inversion precision of the target is improved, and the method can be used for inversion of the surface temperature of the long-distance target.

Description

technical field [0001] The invention belongs to the technical field of infrared radiation measurement, and in particular relates to a three-band cooperative long-distance infrared radiation temperature measurement method. Background technique [0002] With the development of air and space military forces of various countries, space offensive and defensive capabilities are becoming more and more important. For some stealth aircraft, traditional methods such as radar cannot be used for effective detection and early warning. During the high-speed flight of the aircraft, the intense friction with the atmosphere generates aerodynamic heat, the skin temperature rises, and the infrared radiation characteristics are obvious. Therefore, the identification, tracking and early warning of air targets can be realized by obtaining the infrared radiation characteristics and surface temperature of the target. In addition, during the flight of a hypersonic vehicle, the surface temperature r...

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Problems solved by technology

[0006] The main purpose of the present invention is to solve the problem that the single-band measurement error is large, and the dual-band colorimetric temperature measurement method is limited to two bands with the same or similar emissivity. Technical Problems in Carrying out Three-band Collaborative Temperature Measurement

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