SU384088A1 - GRAVIMETER - Google Patents

Description

one

This invention relates to gravimetry.

Gravimeters are known, comprising a housing with a stand, a sensitive system with a symmetrical symmetric with respect to the axes of the suspension and a main spring, an optical system with a light guide, and damping devices in the form of cylinders nested in one another.

However, well-known gravimeters give a low measurement accuracy due to systematic errors that occur under the action of perturbing periodic accelerations, and when the temperature changes, leading to a relative deformation of individual nodes of the gravimeter.

The proposed gravimeter differs from the well-known one in that the stand is made in the form of a tube, inside which the light guide is placed, and the damping devices are located at the ends of the tandem.

Such a constructive implementation of the gravimeter allows to increase its accuracy.

The drawing shows a diagram of the proposed gravimeter.

The gravimeter contains a housing /, a hollow rack 2, in which a lens 3 is placed, a light guide 4, a condenser 5, a source 6 of light, and a photodetector 7. A frame is fixed on rack 2

8, carrying the sensitive system, which contains a tandem I suspended on the thread x 10, 11 and spring 12, compensatory 13 and spans 14 springs, a comb damper 15, the plates of which are located between the turns of the spring 12, and dampers located at the ends of the tandem consisting of cylinder-mounted cylinders 16, 17 and associated with the housing /

stationary cylinders 18, 19 placed inside cylinders 16, 17. Plates 20, 21, 22, 23 are also connected to the housing. They are made in the shape of semi-cylinders, symmetrically located relative to cylinders 16, 17.

The gravimeter works in a well-known way.

Temperature deformations in the gravimeter do not cause errors in the measurement results, since the optical axis of the illuminator and the filament

10, 11 suspensions of the tambourine 9 are located in the same vertical plane.

The combination of damping devices in this gravimeter makes it possible to eliminate the influence of inertial accelerations in a wide frequency range.

The desired degree of damping is established by selecting the appropriate size of the gap between the movable 16, 17 and stationary 18, 19, 20, 21, 22, 23 cylinders.

(half cylinders).

Subject invention

A gravimeter comprising a housing with a stand, 4} a stable system with a symmetrical symmetrical with respect to the axes of the suspension and a main spring, an optical system with a light guide and damping devices in the form

c) One of the other cases of ciliadre, characterized in that, in order to increase the accuracy of the measurements, the stand is made in the form of a tube, inside which the light guide is placed, and the damping devices are located at the ends of the pendulum.

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