光電管式自動露点計の性能
第3報:応答動作
1959 年 28 巻 8 号 p. 451-459
詳細
1959 年 28 巻 8 号 p. 451-459
Linear differential equation for the transient response of dew point indicator is sought for measuring the dew point varying in accordance with a step function.
The form G0=AB(_??_+1)(_??_) was obtained as the loop transfer function of the indicator.
A dew point indicator with a mirror body of an iron cylinder of 0.5cm in outer diameter, 0.3cm in inner diameter and 1cm in length, 0.2cm of the length being so constructed as to be subjected to high frequency heating, satisfied the conditions for damped oscillation at around -50°C. However, for measuring high humidity, “hunting” is apt to happen by over-oscillation. To suppress it, a capacity of 0.1μ F was used in parallel with the resistance connecting the first and second tubes of the direct current amplifier. For non-linear type dew point variation of over 10°C, the responce of the indicator was quick with time lag of only a few seconds.
