| 摘要 |
A method for determining parameters of moving seeds at precise sowing includes using a unit for recording seeds at the precise sowing, in which the seeds exit from a sowing disk of a sowing unit at angle of exit to the horizon, fly through areas of parallel control planes, formed by a three-coordinate optico-electronic unit for recording flight of seeds, which looks like a rectangular box with the largest internal sizes of a coulter and is fixed on the sowing unit. On each side of the box, arranged opposite of an optical unit of a parallel light flow four photosensible rulers are arranged in parallel. All the rulers are connected to a personal computer through a high-speed serial interfaces. While flying through a control area, the seed forms darkening areas on the photosensible rulers, that allows fixing instants of timeof appearance thereof and determining coordinates of the middle of the darkening areas on two mutually perpendicular rulers in said instant of timeaccording to information read off from the output of photosensible rulers at simultaneous appearance of darkening areas on two rulers mutually perpendicular, arranged at the same height. The values and lines of moving speed of each seed are determined by a change in interval of timeand coordinatesin going from the first ruler to the subsequent ones. In the coordinates XOZ an equation of a circle of radiusof arranging sucking openings is recorded. According to the coordinates of points, an approximating function, which is an equation of a seed motion trajectory, is determined.coordinates of Т- points of exit of seeds are determined by a joint solution of a trajectory equation and an equation of a circle of arranging openings on the sowing disk, and, in accordance therewith, direction of a speed vector in the plane XOZ in the instant of exit of seeds (- angle of exit), according to calculatedtaking into account initial valuesat, whereis known angular rotational speed of the sowing disk. Approximating functionsare determined. In accordance therewith in any point of the trajectory the value and direction of seed moving speed are determined. |
