Design And Production Of Intelligent Portable Colorimetric Ignition Temperature Measurement Instrument Based On Magnesium Alloy

Magnesium alloy, one of the lightest structural metallic materials, is widely used in all kinds of engineering practice. it has many advantages like low density, high specific strength and specific stiffness and excellent shock absorption,etc. and it has been used in various fields like spaceflight, military projects, telecommunications and transportation, etc. The active chemical property of being oxidized and corroded easily in air hinders their development, but the ongoing ignition-proof technology for magnesium alloys can improve the demerits. ignition temperature of magnesium alloy is an important characterization parameter of this technology, measuring this parameter accurately is the foundation of improving this technology.In order to improve the shortcomings of slow response, serious thermocouples’ oxidation and erosion, low test efficiency and low precision when employing traditional contact temperature test with a thermocouple, Intelligent portable colorimetric measurement instrument based on magnesium alloy’s ignition temperature was designed. The effective temperature measurement range of this instrument was 400 ℃--1200 ℃, the effective temperature measurement distance was 0cm--80 cm, sampling rate was 20 Hz. ignition was located according to a inflection point since a lot of latent heat was released when magnesium materials began to burn. This instrument has the merits of small volume, low price, high accuracy, high test efficiency and repeatability, so this instrument can also be used to monitor magnesium alloys’ temperature in the machining and smelting process.First, high temperature blackbody source was used to do static calibration on this ignition temperature measurement instrument, the static calibration parameter K0 was obtained, a material’s emissivity test was designed, the emissivity of magnesium alloy were obtained, the instrument was improved. Second, utilizing infrared radiation thermodetector M5 which has been calibrated and intelligent portable colorimetric ignition temperature measurement instrument test temperature at the same time, a couple of temperature date were obtained. In order to improve the accuracy of the instrument, the test of two wavelengths’ emissivities ratio was designed, the temperature results were amended, meanwhile utilizing COMSOL software simulated the magnesium alloy burning temperature filed, Results show that intelligent portable colorimetric ignition temperature measurement instrument can measure ignition temperature accurately and the accuracy is 1%.