光纤高温测量的研究-机械电子工程专业论文.docxVIP

ABSTRACTDuring ABSTRACT During smelting steel and iron，the temperature of molten steel and liquid iron is one of the most important parameters in steel trade．At present,its temperature measurement is extensively adopted consumptive thermocouple in the world，but adopting consumptive thermocouple has the following problems： (1)Every thermocouple canjust be used for one time，so the expense is very hi曲． (2)After every measurement finished，the thermocouple must be replaced． So it is difficult to reaiize automation． (3)It can not measure the temperature continually or in a high frequency． Now，the consumptive optical fiber radiation thermometer is a new method for the temperature measurement of the molten metal．Its accuracy of the temperature measurement is identical with that ofthe consumptive thermocouple． It can totally take place ofthe consumptive thermocouple． In this text，the principles of the radiation temperature measurement are related in detail．And some basic theories and the law on the black object radiation are included． nlis text relates the colorimetry in detail and specially explain its advantages．The colorimetry can greatly lower the blast．off rate which influence the result of the temperature measurement．Under the best term．the influence cart decline to zero． T11is text also introduce some optic—electric colorimetry thermometer in detail bv di丘brent classification． nlc design of也is system can be divided into 3 parts：the structure design for detector；optic signal transform into electric signal；convert signal into data and display．Wb stretch a consumptive optic fiber into the molten metal and take the light signal from it，then mansform the optic signed into electric signal and ampli句the signal．Send the signal into SCM，use the SCM to convert the signal into data and display the true temperature ofthe molten metal． Considering that now．【lle consumptive thermocouple measurement method is widespread in the world．and the technique is comparative mature．So tlle th