Manual data collection and analyzing was a great disadvantage to load-measuring process of agricultural machinery

because it spent much time and lost chance

took higher error

collected dynamic data hardly and so on.But other electromotive instrument or recorder was also not suggested to use

because they were complex in structure

various and difficult in adjusting

too much in cost

applied hardly or ineffectively to field testing with bad or complex environment

etc.So the test equipment system of dynamometer combining with numeric camera was developed.This load-measuring system can collect image data on dynamometer and download to computer

and performed image processing

characteristic variable detecting

statistical analysis of dynamic load-measuring data by MATLAB programming.Results indicate that the method can accurately and roundly collect serial data

provided with absolute error limit ±0.087 2 kN and relative error limit ±0.892 8% within load-measuring range from 5.500 kN to 12.5 kN

satisfy with the test of agricultural machinery.