High precision load measurement by two freedom dynamic crane scale

In this paper we presented a method of high precision load measurement by two freedom dynamic crane scale. The basic point of this approach lies in the idea that the sampling averages of dynamic load signal during a time interval between maximum swing angles, one third and two third central parts of the time interval are functions of maximum swing angle and minimum swing angle. The mass of goods is a constant factor of these functions. By the sampling averages, the mass value of goods can be calculated in dynamic condition. The experimental results indicated that the measurement precision of more than 0.1% FS can be achieved