Mini-Area Precise Measurement Technology Based On Machine Vision

Presently, the machine vision technology has applied to each application field such as electron, motorcar, weave, glass and metalworking. In many occasions that many old methods are difficult to check, machine vision detecting system also can do effectively, which is improving the auto-production and the intellectualized level of checking system. It works enormous at the industry production, especially at high quintessential industry.The paper using check basal geometric characteristic of machine vision's on the industry productions' predominance, and designs a kind of machine vision measuring system is good, efficient, real time and height quality that work in the mini-area characteristic measuring field.The master control chip of the machine vision system had used the TI company multi-media treatment chip TMS320DM642.The system can come true a video collection and a video display function. The worked data is passing UART or USB2.0 arriving at PC. It has verified rationality and reliability that every function module designs before DM642 system circuit PCB being made by the Hyperlynx7.2 simulation software, which is designed by Mentor Company. It has verified rationality that every function module hardware circuit under the control of has been scheduling analysised and has been accorded with system scheduling demand. It finished that chose image edge detection operator and wrote the software works. The Robert operator to having the cliffy low noise image response is better. The Sobel operator, Prewitt operator and Krisch operator handles with the more gradient's gradual change and more noise image gradation is better. Gauss-Laplace operator is first smoothing and losing noise, follow detecting the edges, the effect is better. It finished that the every function module's software programming design and software debugging woks of CCS. They have been work for a long-playing natural work. It finished that the video collect module, the video display module and the UART module driver working of DSP/BIOS. The video collect module has been work for a long-playing, uninterrupted and real time natural work. The display module can have no the error display that the collect object is collected. The worked data is real time and exact passing UART arriving at PC.Experiments have proved that mini-area precise measurement blue print based on machine vision's excellence and the blue print overcomes the shortcomings of the tradition measuring method. It come true High precision, high efficiency and real time mini-area precise measurement, the measuring system is fully respecting the direction of measurement technology in future.