Research On Design Of Intelligent Testing System Of Grain Suspension Velocity

In order to improve production efficiency, more people put emphasis upon design requirements of agricultural equipment in terms of mechanized and intelligence. Grain suspension velocity is a very important design parameter when grain harvesters, grain drying and pneumatic conveying equipment, double threshers and cleaning plant are considered to design. Hence, it is particularly important to be sure the exactly value of grain suspension velocity.This paper selects a kind of CCD sensor ICX085AL produced by Sony, which is considered to be area array, high speed, high resolution and low dark current. High-speed image acquisition system is designed based on single chip and the present research. Both single chip C8051F000 and CPLD XC9536 are selected and put to drive area array CCD and signal processor ADS8320, all of which realize high-speed conversion between digital signal and analog signal output by CCD. Finally, the computer storage and display the dates that through USB interface and also feedback information and control the loop. This kind of intelligent controlling system can realize the grain suspension velocity on real-time monitoring.This set of system chooses array CCD ICX085AL instead of linear CCD TCD1001P, compared with linear CCD, there are three important reasons for this choice.1) This system realize dynamic test of higher resolution ratio. This set not only detect the state of materials particles in the tapered tube, but also detect the location information whether materials particles can be in the same point position at the real-time, Meanwhile captures its relatively stable state of suspension, which realize accurate positioning.2) This sensor adopts rows move mode. It not only can improve the photoelectric conversion efficiency, but also can eliminate the trailing phenomenon successfully. It makes an increase on the accuracy and real-time about material position information.3) It relates to the overlap imaging materials particles and a suspension of distribution state of the same kind of materials particlesl. It is necessary to use the image sensor acquisition corresponding image information with gray histogram binary processing, thus to a certain extent this problem solved. Especially in the late image processing, the array CCD compare with the linear, It shows a huge advantage. Meanwhile, the control cells combined MCU with CPLD produce the temporal pulse which drives CCD and eliminate disadvantages of being unable to produce high frequency signals only with MCU. All of these realize the correct driver of array CCD.This perfect realization of intelligent test device even involves corresponding computer control technology, which realizes the automatic closed-loop control through the human-computer interaction system. This improvement system provide the necessary grain suspension velocity can be widely used in food processing, dusting and clear choose enterprises, teaching and research work etc. Meanwhile, grain suspension velocity is more accurate, and in a certain extent it can guide agricultural production. All of this study has a guiding significance of research direction of agricultural intelligent equipment.