如何应用水准仪前进水准测量.txt(国外英文资料).docVIP

怎样使用水准仪进行水准测量.txt(国外英文资料) How do you measure the level of the level The use of a level of water level The use of the level of the water level includes: the placement of the water level, the coarse flat, the aim, the fine, the reading five steps. (a) settlement The installation is placed on a stretchable tripod and placed between the two observation points. First, open the tripod and make the height moderate, use the evaluation method to make the frame head roughly and check if the legs are strong, Then open the instrument box and connect the level instrument to the tripod with a connection screw. (2) the thick flat The coarse flat is a rough level of the sight of the instrument, which is in the circle of the garden index. The method is shown in figure 9-10 (a), which is located in the area of a, and is based on an arrow The direction of the point is to rotate the spiral 1 and 2 with the hand, allowing the bubble to move to the position of b, as shown in figure 9-10 (b). And then you rotate the foot screw 3 to center the bubble. During the whole process, the direction of the bubble moves in the same direction as the thumb movement. (3) the target The aim is to target the target accurately with a telescope. The first is to turn the telescope on the bright background of the distance, turning the eyepiece on the spiral, making the cross the clearest. Then loosen the fixed screw, rotate the telescope, and align the door and the brightstars connection to the leveling ruler and tighten the fixed screw. Finally turn the light of the objective spiral, make the level ruler clearly on the crosshair plane, to turn the micro screw, make level ruler like on the cross on one side of the vertical wire. (4) with flat A fine flat is the exact level of vision for a telescope. Tilting level, on the upper level tube is equipped with a set of prism, tube on both ends of the bubble can be level, refraction up the side of the glass tube in line with the level within the observation window