Multispectral temperature measuring device based on digital micro-mirror device

Abstract

The present invention discloses a multispectral temperature measuring device based on a digital micro-mirror device. The problem is solved that the real temperature cannot be obtained in the prior art. In the device, light source radiation spectral signals are transmitted to a DMS spectrograph by a heat-resistant and impact-resistant optical detection unit through two sections of optical fibers, are incident into a spectral imaging system through a silt and are collimated to compound color parallel light by a front lens, the compound color parallel light is subjected to dispersion at the surface of a reflective ruled grating to a spectrum band which is converged by the lens, is incident into different positions of the DMD in order according to the wavelength sequence for wavelength gatingand is focused on a single-point detector by the lens for spectrum collection, and finally, an upper computer is employed to perform high-speed spectrum parallel processing and Hadamard inverse transformation decoding to obtain the real temperature and the spectral emissivity of the light source. The device is high in speed, high in resolution, high in signal-noise ratio and very high in adaptivecapacity to environment, is suitable for the real-time measurement of the explosive and powder combustion and explosion flame radiation temperature, and is also suitable for measurement of the temperature of the surface of a high-temperature part.

Description

technical field [0001] The invention relates to a multi-spectrum temperature measuring device, which is suitable for measuring the radiation temperature of propellant and explosive combustion and explosion flame. Background technique [0002] Temperature is one of the most important parameters of the state of matter. Temperature measurement and control plays a very important role in national defense industry, scientific experiments and production and life, especially in the fields of aviation, aerospace, weapons, materials and energy, especially in the fields of high temperature and ultra high temperature measurement. occupies a very important position. Due to the advantages of fast response speed, unlimited temperature measurement, and no influence on the temperature field of the measured object, the non-contact temperature measurement method is more suitable for measuring rapidly changing high temperature measurements than the contact temperature measurement method, and wi...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of multi-spectral temperature measurement device based on digital micromirror (Digital Micromirror Device, DMD), to overcome the existing radiation temperature measurement device due to factors such as the influence of fire and explosive combustion and explosion flame spectral emissivity. lack of temperature

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