Discussed are the method for measuring oil water interface, calculation formulas and control principles.
讨论了油水界面的测量方法，计算公式和控制原理。
2
It uses Fourier series in expanding calculus, to achieve the measuring and calculation of volt, current, power factor and quantity of electricity.
采用傅里叶级数展开计算法、实现对电压、电流、功率因数和电量的测量和计算；
3
To against the problems existing in ultrasonic level detection, the measuring principle, calculation formula and applicable features of the method of structural light of laser is introduced.