4.6. 投种过程的高速摄像试验研究气力滚筒集排式排种器的投种轨迹是排

4.6. High-speed video experiment study of the seeding process <br>. The seeding trajectory of the pneumatic drum set-and-row seed metering device is an important basis for the design of the seed metering tube structure. The design of the seed metering port structure affects the cavitation of rice seeds and the initial speed of seed delivery Therefore, the research on the trajectory of rice seeding is of great significance to the design of the metering device and the whole machine. This paper takes the pneumatic drum set-row seed metering device as the research object, and uses high-speed camera technology to study the movement trajectory of the rice seed during the seeding process. The impact on cavitation. Simplify the rice seed model, take the geometric center of the single rice seed as the research object, ignore the analytical holes between the rice seed, and carry the rice seed to the positive pressure zone, and break away from the negative pressure suction force after being separated from the drum under the action of positive pressure and gravity. The motion trajectory and its force, the high-speed camera test device is shown in Figure 18.

4.6. Experimental study on high speed camera in seed feeding process<br>The seed feeding trajectory of the pneumatic drum collecting and discharging seed metering device is an important basis for the structural design of the seed metering tube. The design of the seed metering port structure affects the cavitation of rice seeds and the initial speed of seed delivery. Therefore, the research on the seed feeding trajectory is of great significance to the design of the seed metering device and the whole machine. In this paper, taking the pneumatic drum collecting and discharging seed metering device as the research object, the motion trajectory of rice seed in the seed feeding process is studied by using high-speed camera technology, in order to optimize the seed metering port according to the trajectory curve, reduce the collision between rice seed and seed metering port structure and its influence on cavitation. Simplify the rice seed model, take the geometric center of single rice seed as the research object, ignore the analytical hole between rice seeds, rotate the rice seed to the positive pressure area, get rid of the negative pressure suction, and the motion track and stress after getting rid of the drum under the action of positive pressure and gravity. The high-speed camera test device is shown in Fig. 18.

4.6. High-speed camera experiment research on seeding process The seed throwing trajectory of pneumatic roller centralized metering device is an important basis for the structural design of the metering tube. The design of the structure of the metering port affects the cavitation of rice seeds and the initial speed of seed feeding. Therefore, the research on the seed throwing trajectory of rice seeds is of great significance to the design of the metering device and the whole machine. In this paper, the pneumatic roller centralized metering device is taken as the research object, and the high-speed camera technology is used to study the movement trajectory of rice seeds in the process of seeding, in order to optimize the metering port according to the trajectory curve, and reduce the collision between rice seeds and the metering port structure and its influence on cavitation. Simplify the rice seed model, take the geometric center of a single rice seed as the research object, ignore the analytical holes between rice seeds, rotate the rice seeds to the positive pressure area, and get rid of the negative pressure suction force and the movement track and stress situation of the roller under the action of positive pressure and gravity. The high-speed camera test device is shown in Figure 18.