The Acquisiton And Processing Of The Curve Data Of The Profile

It is the foundation for making use of computer to process the shape geometry information of the object that acquisiton the curve data of the figure. This paper combining the fact of the safe monitor of a track of railroad shape, researched the method and system for the acquisiton and processing of a kind of object's figure curve. At the same time, it fit other occasion also.Because the DSP chip of the TMS320LF2407A have a characteristic of low power waste and quick processing speed, and have the function of processing the light electricity encoder signal directly, so it is choosed to be the CPU of the mold piece with which we acquires and processes the outline curve data.The mold's piece have two sets of just hand over to code the pulse(QEP)processing electric circuit, can carry on to two sets of lights electricity encoder four subdivide to count, raise the resolution, and have the standard string to go the correspondence to connect, can connect with each other with the an of the PC machine, delivering the data to the PC on board carry on the analysis and processings.The module for acquisiton is simple. It included the least components of 2407A which is memory, conversion of power (5V~3V) and the JTAG debug connector etc. We have completed the circuit connection of TTL-to-RS232 and DSP to the photo electricity encoder. We also have completed its circuit diagram. We developed the software of 2407A which included the configuring of the system, exterior interrupt, counting of the Quadrature Encoder Pulse (QEP) signal and serial communication etc. The developing of the software is based on the CCS2.21.We adopted Visual C++ as the development platform and have developed software of the man-machine interface which runs on Windows. In the development of the software the design means of multithreading is used. Then the synchronization of inter-threading along with the share accessing for the buffer and mutex means are adopted, which assured the security of the real-time display for the graphics and the data. The program of the man-machine interface also saved the data in a text file in order to farther analyzing and processing are carried through with other professional...