Fig. 1. Colorimetric temperature measuring device schematic diagram

Fig. 2. The relationship curves of wavelength and blackbody radiation emission degree at different temperatures

Fig. 3. The ratio curves of temperature and radiation power at different wavelengths

Fig. 4. The relation curves between temperature and sensitivity at different wavelengths

Fig. 5. The ratio curves of temperature and radiation power at different wavelength intervals

Fig. 6. The relation curves between temperature and sensitivity at different wavelength intervals

Fig. 7. The ratio curve of temperature and radiation power at different bandwidths

Fig. 8. Schematic diagram of photodetector circuit

Fig. 9. Schematic diagram of the photodetector conditioning circuit

Fig. 10. Static calibration experiment of colorimetric temperature measuring device

Fig. 11. Curve results of polynomial fitting method

Fig. 12. Colorimetric temperature measuring device

Fig. 13. Three groups of experimental relationship graph. (a) (c) (e) Temperature and time curves measured by the two devices in the three experiments respectively; (b) (d) (f) relative error curves of the temperature measured by the two devices in the three experiments respectively