Development Of Explosion Flame Temperature Measurement System Based On Multi-Spectral Thermometry

As the development of the science and technology, people pay more and more attentions to the temperature measurement and have higher demands for accuracy. In some conditions, temperature measurement has become key problem. Besides, because of the energy crisis temperature monitoring is becoming more and more important with the purpose of energy conservation and environmental protection in the industrial production field especially in the fields of aerospace, materials, energy, metallurgy and so on.The measurement of the temperature can be divided into contacting and noncontacting one. The contacting measuring temperature gets the true temperature of the objects, however, it has poor dynamic characteristics. It will influence the temperature distribution because it has to contact the measured object and it can't be used to measure ultrahigh temperature due to the restriction of working temperature of sensitive materials. Now radiation thermometry is the chief noncontacting measurement for that it hasn't upper sensing limit and has the characteristics of wide temperature tested ranges, fast response, no destruction to temperature distribution and so on. So in the actual application, the technology of radiation thermometry is paid more and more attentions and being applied to high temperature rapid measurement.The paper is to measure the transient temperature of missile explosion with multi-spectral thermometry. A detailed description on the development of explosion flame temperature system of hardware and software was given. The hardware circuit mainly includes I/V conversion circuit, three-stage amplifier, sample and hold circuit, A/D convert circuit and external expanding memory. The core of the software is TMS320F2812DSP. We choose it to be the core just because it has low cost, low power, high speed and good real-time performance.The range of temperature for measurement is 800℃~3500℃, so it has large range of temperature measurement. Besides, it can implement accurate measurement and has reliable performance. Meanwhile, we have done some corresponding processing to prevent the explosion, so it has certain removability. Above all these reasons, it will have a very good application prospect in national defense, aerospace and aviation field.