| 摘要 |
Device comprises a housing for a laser and a housing with a photo cells that are set on the supports of a lath. From the laser housing horisontal parallel rays go toward the photo cell housing with photo cells on certain distance filling up the space above the lath in vertical plane. Photo cells are connected to the display of the monitor. Jumping over the lath, the jumper stops the laser rays, and the highest uninterrupted ray activates the photo cell that is set at that height, thus the monitor displays the actual jumped over heigh with a correct high jump. |
