The type and characteristics of the level, blister level manufacturers for you
Blister level manufacturers believe that 17-18 century after the invention of the telescope and level, the invention of the level. At the beginning of the 20th century, the micro-tilt level was produced on the basis of making internal focusing telescopes and levels. In the early 1950 s, automatic anping level appeared. Laser level was developed in the 1960 s. Electronic level or digital level appeared in the 1990 s.
blister level manufacturers believe that 17-18 century after the invention of the telescope and level, the invention of the level. At the beginning of the 20th century, the micro-tilt level was produced on the basis of making internal focusing telescopes and levels. In the early 1950 s, automatic anping level appeared. Laser level was developed in the 1960 s. Electronic level or digital level appeared in the 1990 s.
The blister level manufacturer believes that the micro-tilt level is an ordinary level that obtains a horizontal line of sight with the help of a micro-tilt screw. When working, use the circular level to roughly level the instrument. Before each reading, use a slightly inclined screw to tilt the compliant level on the vertical plane until the compliant bubble is accurately centered and the line of sight is level. Compared with the ordinary level, the miniature precision level has the advantages of small division value, high sensitivity, large telescope magnification, strong brightness, and firm instrument structure. In particular, the connection between the telescope and the tube level is firm. It is equipped with an optical micrometer and a precision leveling rod to improve reading accuracy. The micro-tilt precision level produced in China has a telescope magnification of 40 times, a tube level with a dividing value of 10/2mm, and an optical micrometer with a zui reading of 0.05mm. The sighting part of the telescope, the tube level and the optical micrometer are all mounted together in a heat shield.
Blister level manufacturers believe that automatic leveling is a level with the help of automatic leveling compensator to obtain a horizontal line of sight. Its main feature is that when the line of sight of the telescope is slightly tilted, the compensator moves the telescope relatively under the action of gravity, so as to automatically and quickly obtain the ruler reading of the line of sight level. The basic principle of compensation is that when the line of sight of the telescope is horizontal, the image point Z0 composed of the object point P on the level ruler with the same height as the main point of the objective lens should fall on the intersection point Z of the crosshairs. When the telescope is tilted at a small angle relative to the horizontal, the intersection point Z of the crosshairs moves upward, but the image point Z0 is still in place, resulting in a reading difference Z0Z. When the distance between Z0Z can be regarded as f(f is the focal length of the objective lens) is very small, a compensator can be installed at the K point in the optical path to make the light produce a bending angle. Under the condition of f = S0(S0 is the distance from the compensator to the center of the crosshair, I .e. KZ), the image Z0 will fall on the Z point. Or the crosshair automatically swings the instrument in the opposite direction, and the intersection point Z of the crosshair falls on Z0.
The blister level manufacturer believes that when the optical path is offset instead of bent, as long as the translation amount is equal to Z0Z and the intersection point z of the crosshair falls on the image point Z0, the coincidence of Z0 and z can also be realized. The automatic level compensator can be divided into movable objective lens, movable cross wire and suspended prism according to its structure. All compensation devices have a "pendulum". When the line of sight of the telescope is slightly tilted, the compensating element oscillates. In order to stabilize the swing of the "pendulum" as soon as possible, air dampers or magnetic dampers must be installed. This instrument has higher working efficiency and more stable accuracy than the micro-tilt level, especially in areas with windy and temperature changes.