This invention discloses a downconversion
fluorescence thermometry method based on bilinear mode, implemented using a hardware
system. The hardware
system includes a 280nm light-emitting
diode, two convex lenses, and a Tb... 3+ :Cs2Na 0.9 Ag 0.1 The
system comprises InCl6 temperature-sensing material, a
grating spectrometer, an
oscilloscope, a
signal generator, a computer, and a
thermostat. The specific implementation steps are:
signal excitation and acquisition; temperature calibration; actual
temperature measurement; and high measurement accuracy: VPR mode
linear correlation coefficient R² ≥ 0.998, FL mode
linear correlation coefficient R² ≥ 0.992, avoiding measurement errors introduced by the exponential bias or correction term of traditional FIR technology, thus fundamentally improving
temperature measurement accuracy.