SU1073734A1 - Device for registering gravimeter sensing element position - Google Patents

Description

The invention relates to geophysics, and more specifically to apparatus for remotely controlled gravimetric measurements, and can be used in devices with remote recording of small displacements.

Optical and photoelectric systems are known for detecting the position of the sensitive element of the Cl 3 gravimeter.

A disadvantage of the known systems for recording the position of a sensitive element of a gravimeter is its low sensitivity.

The closest in technical essence to the invention is the recorder of the position of the gravimeter sensing element, containing an illuminator, a movable mirror, a separating prism, two differentially-connected photocells, placed in such a way that the beam from the illuminator hits the movable mirror and, through the separating prism, on photo cells C23 ,

A disadvantage of the known device is low sensitivity,

The purpose of the invention is to increase sensitivity.

This goal is achieved by the fact that the recorder of the position of the gravimeter sensing element containing an illuminator, a movable mirror, a separating prism, two differentially-connected photo cells arranged so that the beam from the illuminator hits the movable mirror and, after the separating prism, on the photocells, contains a fixed convex mirror placed so that the beam, having reflected from the movable mirror, pops up onto a fixed convex mirror and, having reflected from it, onto the separating prism. Except toro, fixed

the convex mirror is spherical.

The diagram shows the layout of the device.

The device contains an illuminator 1, a movable mirror 2, a fixed convex mirror 3, a separating prism 4, photocells 5 and 6.

The operation of the device is as follows.

The beam from the illuminator 1, which is successively reflected from the moving mirror 2 and the fixed convex mirror 3 through the separating prism 4, illuminates the photocells 5 and b.

In the initial state, the direction of the beam that hits the dividing prism 4 is such that the photocells 5 and 6 are equally illuminated. Three mutually perpendicular planes can be distinguished at the point of reflection of the beam from a fixed convex mirror 3. In one of the planes are the incident and reflected rays, the second plane is tangent to the plane of the fixed convex mirror 3, the intersection of the third plane with its plane forms a curve along which the beam can move during the turns of the movable mirror. In the case of a fixed convex mirror 3, this curve will be an arc of a circle with a certain radius of curvature, which ensures the symmetry of the recorder's work the same offset of the reflected beam from the fixed convex mirror 3 at the same angles of rotation of the movable mirror 2.

The use of the invention makes it possible to increase the sensitivity of the position sensor of the sensitive element of the gravimeter due to the fact that the introduction of a fixed convex mirror results in an increase in the movement of the end of the beam, which is applied to the dividing prize.

Claims (2)

1. RECORDER OF THE POSITION OF A SENSITIVE ELEMENT OF A GRAVIMETER, containing a illuminator, a movable mirror, a dividing prism, two photocells switched on differentially, so that the beam from the illuminator hits the movable mirror., Passing the dividing prism, onto the photocells, This is due to the fact that, in order to increase sensitivity, it contains a fixed convex mirror so that the beam, reflected from the moving mirror, enters the fixed convex mirror and, reflected from it, onto the fission prism . 2. The registrar according to π. 1, characterized in that the stationary convex mirror is spherical.