SU711359A1 - Autoreduction zenith-projector - Google Patents

Description

(54) AUTOSPRODUCTION ZENIT PROJECT

The invention relates to the field of instrumentation and is intended to set and control the direction during the excavation of mine workings, for geodetic maintenance of the construction of high-rise buildings and structures. A projection plummet containing a housing mounted on a tripod is installed within which a light source is installed, for example, a laser, a collimator, a compensator sensor in the form of a cylinder suspended on tied yarns, and a liquid damper serving to stabilize in a sheer, position of light rays. However, the known zenith - the design is insufficiently reliable and has large dimensions due to the use of a sensor and a liquid damper. The auto-reduction zenithproject is known, comprising a housing, a light source, a collimator, an optical element of a compensator, a sensor with two coaxial cylinders, magnetic dampers and a trigger 2-. The disadvantage of this device is the insufficient reliability of installing the sighting beam on the plumb line. The object of the invention is to improve the accuracy and reliability of the auto-reduction zenith projector. The goal is achieved by the fact that in the proposed device its optical element is mounted on an outer cylinder, the threads of which are attached to the upper end of the inner cylinder, and the threads of the inner cylinder are fixed on the body, so that the sensor is located below the collimator lens, each one. the cylinder contains three magnetic dampers installed after 120. In FIG. 1 shows a section of the proposed auto-design zenithproject along the optical axis of the device; in fig. 2 - top view of the device without a cover; in fig. 3 is a diagram explaining the principle of the sensor and magnetic dampers; in fig. 4 shows the fastening of the sensor threads. The auto-reduction zenith design contains an optical plummet 1, a hollow axis 2, a sleeve 3, a laser 4, a power cable 5, a housing b, a base of the compensator 7, a trigger 8, magnets 9 and 10 of the internal cylinder damper, the lower mounting of the outer cylinder yarn .11, to cremalieru 12 with sub-papicnik 13,

vutral cylinder 14 of the sensor outer cylinder 15 of the sensor, thread 16 of the suspension of the outer cylinder, ring 17, frame 18 of the positive compensator lens, frame 19 of the movable negative compensator lens, tide 20 krylshki.21 with zagogitny glass 22, ring 23 of the outer cylinder of the sensor, negative lens 24 compensator, positive compensator lens 25, upper fastening of the filament 26 of the inner cylinder of the sensor with a stopper 27, outer cap 28, col lector 29, thread 30 of the inner cylinder of the sensor, magnets 31 and 32 of the damper of the outer cylinder, braking an outer cylinder plate 33, a nut 34, a bolt 35, a laser fastening screw 36, a laser casing 37, a cylindrical level 38 and a plate 39.

Each coaxial cylinders 14 and 15 are suspended on three threads, located through the cross section, of the cylinders. When this point of attachment of the threads of the inner cylinder A, A, and A 3 are offset from the points of attachment of the threads of the outer cylinder B, B, and B by 60 ° (see Fig.2). The effective length of the filaments of the inner cylinder, center 8 and of the outer cylinder 6 g must satisfy the condition (see FIG. 3) S.

W

where f is the focal distance of the optical element of the compensator {negative lens 24)

The threads are fastened in the upper and lower ends of the cylinders by soldering in a sleeve clamped by a stopper 27 (see, Fig. 4). The oscillations of the cylinders of the sensor, the compensator are extinguished with the help of magnetic dampers, with each cylinder being calmed independently of the other cylinder. For these purposes, each cylinder has three magnetic dampers installed through 120 ° Magnetic dampers

one cylinder is shifted relative to the magnetic dampers of the other cylinder by 60.

Autoreduction Eenit-Prodir works as follows.

When the instrument is tilted, a relatively negative lens 25 of the movable negative lens 24, mounted on a filament sensor consisting of two cylinders — steps, is displaced. Lenses 24 and 25 form an afocal optical system. Since the total length of the sensor threads is equal to the focal distance of the lens 24, the light beam extending into the zenith will automatically stabilize in the direction of the plumb line, focusing. The collimator is produced by Cremalero 12.

Claims (2)

1. USSR author's certificate number 329383, cl. G 01 C 15/10, 1972. 2. USSR author's certificate number 598624, cl. G 01 C 15/08, 1975 (prototype). 2S.