圧電振動子特性測定の自動化の試み
A Trial for an Automatic Measurement of the Piezoelectric Vibrator

Takuro Ikeda
1964 Acoustical Science and Technology  
Atrial for an automatic measurement of the piezoelectric performance was carried out with success for the purpose of treating many specimens and measuring temperature dependence . Various methods of piezoelectric measurements were examined if they are suitable for being automatized or not , and after all the follewing pr edure was adopted here. The damped capacity of the piezeelectric vibrator is compensated with a condenser at low frequency by using a differential transformer , and then the
more » ... r , and then the frequency o 乏the o 醗 illator is varied . When the phase of the current through a terminating resistor equals to π / 40r 一 π / 4, the frequency and conductan , corresponding to each quadrantal point , are measured . The results are dig1tally printed by a typewriter in 70 seconds , in order of temperature , capac 量 ty , frequency and conductanoe at 丘rst quadrantal point, those at second one and temperature 。 The el tro − mechanical coupling coe 伍 cient , the quality factor and other physical parameters of the piezo − electric mater 三 al are calculated
doi:10.20697/jasj.20.5_329 fatcat:6tvs5exijbazlm5brwf7w6k5w4