Weighing, essentially measure the quality of the object to be tested, it cannot be directly measured, the measurement method is described based on Newton's second law of inertia characteristics of all matter, namely the special form of F = ma W = mg, type of g for gravitational acceleration of gravity. Currently used in the mechanical world weighing apparatus and electronic weighing apparatus is inseparable from the two necessary conditions: one is the gravitational field; Second, the static equilibrium. So the scale is called static scale, the method is called static weighing method. But in scientific research, production, often encounter objects need to be weighed in the movement, with the help of vibration source interference conditions need to be weighed, and static quality measurement method and the static electronic scale is powerless. In order to solve the portable weighing device

A major problem in the field of day, the scholars began to work as early as the mid - 1980 - s, and has achieved the stage results, is developing in the direction of the practical application.

At present, there has been a new dynamic weighing technology progress. Weighing on an object in motion, it is made up of weighing sensor and so on parts of dynamic weighing system is not closed loop automatic control system, it is a data acquisition system. Namely according to the dynamic weighing system is given by processing the signal characteristics and quantity of isolated is proportional to the quality of the dc component, so the dynamic weighing method is a method of signal processing is given priority to, so to speak. Its measuring value instead of the actual value of the error, mainly depends on the interference of dynamic weighing, and the dynamic characteristic of the weighing system itself (that is, the transfer function of the weighing system). At present more dynamic weighing signal processing method are digital filter method, estimation method and comparison method. In recent years, achieved good results of crane electronic scale software compensation technology of wire rope, quick weighing and dynamic weighing with new type of dynamic weighing sensor and its resistance to vibration and impact weighing module development and application of the technology, highway vehicle axle load scales of high-speed weighing technology and so on