High temperature high-speed thermodetector based on colorimetric method

Abstract

The invention discloses a high temperature high-speed thermodetector based on a colorimetric method, which comprises an optical part and an electrical part. Visible laser light emitted by an indicating laser is focused to a target test point through an optical lens after passing through a laser beam expanding collimating mirror and a double-color reflecting mirror, near-infrared radiation emittedby the target test point is changed into parallel light through the optical lens, the parallel light penetrates through the double-color reflecting mirror and is equally divided into two parts, the two parts of light penetrate through first and second narrow-band optical filters and third and fourth focusing lenses, are gathered to first and second photoelectric detectors and are converted into electric signals, the electric signals pass through first and second pre-amplification circuits and first and second peak value holding circuits, then pass through first and second AD acquisition devices and are acquired by an upper computer, and the temperature of the test point is obtained through calculation. The invention provides a high temperature high-speed thermodetector based on a colorimetric method, which can perform ns-level time response non-contact test on the temperature from 500 DEG C to 5000 DEG C, has the advantages of safety in use, long service life and the like, and has thecharacteristics of high sensitivity, large temperature measurement range and the like.

Description

technical field [0001] The invention relates to the technical field of temperature measurement, in particular to a high-temperature and high-speed thermometer based on colorimetry. Background technique [0002] In metal smelting, ceramic firing and other fields, efficient and accurate measurement and monitoring of product surface temperature in the production process is one of the important links to ensure product quality; in the field of engines, especially the field of aero engines, in order to ensure the performance of the engine itself Stability and improving its service life require accurate testing of the temperature of the high-speed running blades; in the field of scientific research, the temperature characteristics of the space shuttle entering the atmosphere, the temperature characteristics, new technology, and new technology of ultra-high-speed target wind tunnel research. The temperature test and control in the process of material research and development are ins...

AI Technical Summary

Problems solved by technology

This method can realize the test of temperature distribution, but the disadvantage is that the structure is complex, the spatial resolution is not high, and there is no restriction on the specific band used.

Invention patent 201410561766.7 discloses a fiber optic radiation thermometer based on colorimetry. Although the thermometer can realize the measurement of the thermal field of the crystal furnace, it uses silicon-based photodiodes (working at 400-1100nm) and InGaAs-based photodiodes (Working at 800-1700nm), no filter is used for spectral limitation, and the difference between the two bands is la

Images