Abstract
With the development of technology of sensor ,electronic and computer ,the dynamic
weighing technology is developing rapidly .Weighing system made significant progress in the
digital and intelligent ,the research of Weighing system has entered a new phase .Belted
dynamic weight equipment is designed for continuous weighing the bulk solids or powders on
conveyor belt .And it is widely used in the fields of electricity ,chemical ,coal and
food .However ,our related products generally with single function and low
precision .Therefore ,the improvement of existing weighing devices ,research and
development functional dynamic weighing system is imperative.
This paper designs a belted dynamic weighing system based on SCM ,which is a good
solution to this problem .In this paper ,the overall structure of the weighing system is present
first ,and detailed analysis of the system model and working principle .It analyzes the cause of
dynamic measurement errors ,and builds a mathematical model for dynamic measurement
errors of single-idler electronic belt conveyor scale .According to the model ,the proposed
approach use algorithm to correct errors .Solved the problem of low dynamic measurement
accuracy .Then the design of system hardware and software is present .And data processing
algorithms and their programming design .System uses 24-bit precision A/D converter
AD7730 convert the weighing signal to ensure high-precision measurement results .The result
has shown the measurement errors are effectively reduced ,and the measurement accuracy can
up to 0.2%.The system presented in this paper is characterized by high precision ,good
stability and achieved the functions of real time monitoring and data preservation .And with
the Profibus interface ,this system was well positioned to meet the requirements of industrial
automation and management modernization.
Key words： Dynamic weighing Transmission belt AD7730 Profibus
