圧電振動子特性測定の自動化の試み

概要

論文の詳細を見る
A trial 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 piezoellectric measurements were examined if they are suitable for being automatized or not, and after all the following procedure was adopted here. The damped capacity of the piezoelectric vibrator is compensated with a condenser at low frequency by using a differential transformer, and then the frequency of the oscillator is varied. When the phase of the current through a terminating resistor equals to π/4 or -π/4, the frequency and conductance, corresponding to each quadrantal point, are measured. The results are digitally printed by a typewriter in 70 seconds, in order of temperature, capacity, frequency and conductance at first quadrantal point, those at second one and temperature. The electromechanical coupling coefficient, the quality factor and other physical parameters of the piezoelectric material are calculated from these data. Some errors and matters of question occurring in this automatic measurement were discussed, especially the subject of a deviation of phase from π/4.
社団法人日本音響学会の論文
1964-09-30