| 摘要 |
The inversion temperature of a quartz piezoelectric resonator is determined by exciting the resonator at its resonant frequency, bringing the resonator to a first temperature Th, obtaining the resonance frequency fo at the temperature Th as a standard of comparison for the subsequent measurement of resonator frequency variations, bringing the resonator to a second temperature Tf and measuring the relative frequency spread (f-fo/fo) while the temperature is varying from Th to Tf, detecting the maximum value of the frequency spread, and deducing the temperature at which the maximum value occurs. One of the first and second temperatures is greater and the other is less than the inversion temperature.
|
