Application of TMS320LF2407A in the New Interpolation Method on Moiré Fringe
Mao Zhiyang · Journal of Changchun University of Science and Technology · 2007
In the digital servo system,the common position sensor is the encoder.In the traditional position measurement system,the high-precision position measurement demand can be achieved by the interpolation to Moire fringe and emendation to the extractive and coarse signal.A new interpolation Method was proposed in the paper.This method applied the charouteristic of TMS320DLF2407A,such as the fast operation speed,the strong data processing capacity.The method can obtain the higher precision position measurement result by calculating the different counter value.And the smallest resolving power is decided by the operation speed of DSP.The method can avoid many error influences to the interpolation result,such as the scoring error to the extractive signal in machine,the emendation error to the extractive and coarse signal in electronics,and the A/D conversion error,and etc.Analysis indicated that the method was briefness,easy to operate and easy to amend.This method has high utility value to advance the technology target of the encoder.