Improvement Of Head-suck In Pneumatic Grasshopper Trapper And Analysis Of Locust Suck Trace

To study the catching process of the Grassland Locust Pneumatic Trapper and further improve the suction trap rate . First , install side baffles to extend the effective catching range on suction mouth , measure wind speed of the suction mouth , through analysis when the baffle's angle is 22°, the effective catching range reached the optimum , increased 20～30mm than uninstalled , it is beneficial to improve the suction trap rate . Secondly , smoke and fire experiment are done for the suction mouth , using ANSYS simulate the air flow of suction head . By contrast , a conclusion is obtained that in the middle of suction head air flow show horizontal distribution , so simplify the suction flow as vertical to the suction mouth . At last , analyze force and establish equation using Newton's second law , solving the equation , then establish trace of different quality, different locusts'Relative velocity with Matlab , it is found from the analysis that sunction trap time less than 0.07s , the influence factors for trace is wind speed in suction mouth , locusts'weight , take-off speed . Through investigate and analysis on the trace of locust , the locusts'escape region is obtained , that is , when the height of the suction mouth above ground surface is 150mm , and the locusts jump speed less than v₀ = 0～1.51m/s , jumping angle betweenα=0～70°, then the locusts could escape .