Three-dimensional temperature field measurement system and method based on pixel-level spectral light splitting detector

Abstract

The invention discloses a three-dimensional temperature field measurement system and method based on a pixel-level spectral light splitting detector. The system comprises a light field camera and a data processing module; the light field camera is used for obtaining light field image data of all object points in different directions on a target three-dimensional object; the data processing moduleis used for obtaining the real temperature of the three-dimensional temperature field of the target three-dimensional object according to the light field image data; the light field camera comprises adiaphragm, a main lens, a micro lens array and a pixel-level spectral light splitting detector which are arranged in sequence; the pixel-level spectral light splitting detector comprises a filter array and a detector pixel array which are tightly attached to each other; the filter array is located between the micro lens array and the detector pixel array; and the filter array comprises a plurality of spectral filters with different wavelengths. According to the three-dimensional temperature field measurement system and method, multispectral information of the target three-dimensional object can be obtained through one-time shooting; the structure of the system is simple, and data sampling is convenient.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement, and in particular relates to a three-dimensional temperature field measurement system and method based on a pixel-level spectral spectroscopic detector. Background technique [0002] Three-dimensional temperature field measurement widely exists in various fields, such as weapon development, internal combustion engines of automobiles, power plant boilers, aerospace rockets and aircraft engines, etc. In particular, the three-dimensional temperature field of high-temperature fireballs produced by the explosion of weapons such as artillery and missile warheads is an important tool for evaluating The important indicators of lethality and explosive raw material ratio are of great significance for updating and accelerating the development of weapons and national defense construction. [0003] The current temperature measurement methods are generally divided into contact temperature measu...

AI Technical Summary

Problems solved by technology

Contact temperature measurement devices often have many limitations and potential safety hazards. They can only obtain single-point temperature values ​​at certain positions of the measurement object, and the response speed is slow and the error is large.

Among the non-contact measurement methods, the laser diagnostic method has high measurement accuracy, but the system is complex, which puts forward high requirements on the environment and instrument accuracy; the single-camera infrared radiation imaging temperature measurement method can only realize point, line, The one-dimensional or two-dimensional measurement of the surface, the three-dimensional temperature field measurement based on the camera array has problems such as complex system, large volume, and cumbersome debugging.

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