Design Of Multi-Color Collection System

It’s an important method to color collection, recognition and objectively evaluation by using color sensors, and it can avoid inducing the deviation caused by human eye recognition. At present, most relevant domestic instruments can realize the single channel color detection, but it cannot meet the industry requirements. So the multiple channel detection technologies will be the main development direction of color measure. A multi-channel system for collecting and identifying color is designed in this dissertation, which has high efficiency and low cost. Color information can be acquired and collected by several color sensors controlled by MCU (Micro-programmed Control Unit).Firstly, the optical path design is necessary for the whole system. The system selected white LED as light source. Since white LED have high efficiency and environmental advantages. Optical system is designed in a closed container.Secondly, the circuit design for color acquirement is accomplished. Some white LEDs are employed as the lighting source, and newest TCS3200chips are chosen as the color sensor with digital interface to realize multiple channel color detecting without interference by controlling the enable pin of the color sensor. In the aspect of the controller, STC89C54is selected as the high-performance MCU with8-bit. The communication module adopts RS-232to USB. Rapid transmission and good stability of data are the characteristics of this communication by USB. By using Protel, we can realize the function of the circuit diagram and PCB (Printed circuit board).Finally, we need to write and debug the routine of the whole system. The writing of the routine includes the underlying control program of MCU and the interface displays the program of PC. After that, it is the debugging of the whole system. Finally, we analyzed the collected data. The results show that the stability of data collecting met the original requirement, and its fluctuation is controlled less than3%. Data has been processed through the color theory, and the color of the object can be determined.