SU1166034A1 - Seismograph register - Google Patents

Abstract

A seismograph registrar containing sources of writing light beams and a recording medium, characterized in that, with Gzhel, an increase in the reliability of recording by automatic channel-by-channel self-adjustment of light fluxes of their own light beams is proportional to the speed of their movement on the recording medium, an additional plate of photochromic material is inserted into it in front of the record carrier, perpendicular to the plane of movement of the writing light beams. (L

Description

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The invention relates to seismometry, in particular, to devices for light-beam recording, and can be used in seismology for light-beam recording of vibrations during earthquakes, explosions, and other seismic phenomena.

Known registrar seismograph PC-II, containing sources of writing light beams in the form of collimators and galvanometer mirrors and the recording medium in the form of photographic paper, mounted on the drum l 1.

The disadvantage of this recorder is a change in the photocurrent exposure by writing light beams when the latter moves on the carrier during recording of seismic vibrations, which leads to a deterioration of the recording quality until it disappears at high speeds of movement. Pish5ptsih light beams on the recording medium.

The closest to the invention according to its technical purpose and implementation is a seismograph recorder containing sources of light beams and a recording medium C2,

In this recorder, the luminous flux is controlled by a mask, a photodetector, and an electronic circuit, so that

the brightness of the collimator lamp, it is possible to either control the luminous flux of only one writing beam, or, simultaneously and simultaneously, change the light flows of the writing beams of all the recording channels. Simultaneous per-channel adjustment of the light fluxes is possible only with the introduction of similar individual automata into each recording channel. If for all recording channels a common single collimator is used, the channel-by-channel adjustment of the light fluxes in the known register becomes impossible,

The purpose of the invention is to increase the reliability of registration by automatic channel-by-channel self-regulation of the light fluxes of writing light 1; the guts are proportional to the speed of their movement on the record carrier,

This goal is achieved by the fact that a seismograph register containing sources of writing light beams — and a record carrier — is additionally inserted into a plate of photochromic material, mounted in front of the record carrier, perpendicular to the plane of movement of the writing light beams.

The drawing shows a diagram of the proposed device.

The device contains sources of 1.1-1.3 writing light beams 2.1-2.3, photochromic plate 3 and record carrier 4,

Register seismograph works as follows.

When recording a signal, the writing light beam, for example, 2.1 moves in the plane of the drawing. At the same time, a beam of 2.1 with a constant luminous flux Φ const falls on the photochromic plate 3. This causes the photocoloring of plate 3 at the place of beam dip 2.1, which leads to an increase in the optical density D of the plate material in this place, proportional to the amount of illumination (exposure ) H: D anH, where a is const. Here is H Et, where E is the illuminance, t is the exposure time. Since Ф «const, and the light beam incident on the plate 3 2.1 when registering does not change its parameters, then E const and D bt, b const. When moving the light beam and 2.1 on the photochromic plate 3 with the speed V, the exposure time t at each point of the beam path along the plate is inversely proportional to V and, therefore, D C / V, with const. When the light beam 2,1 leaves the photochromic plate 3 from this place, its photobleaching occurs and the original optical density is restored. The light flux of the beam 2.1 after passing through the plate 3 becomes equal to Ф Ф Ф / DV / c. The writing beam with the flux Ф Ф falls on the record carrier 4 and moves along it with the same speed V. At the same time beam E d, d const, a exposure time t 1 / V, 1 const. At the same time, the amount of illumination at each location of the carrier 4., through which the writing light beam passes 2.1, AND, dRtf-V / c const, m, e, exposure The carrier 4 records are written by

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: The light path 2.1 is constant along the recording line. The same is true for the remaining light beams.

The use of the present invention allows to obtain a separate channel-by-channel self-regulation of the light fluxes of writing light beams of seismic registers, regardless of the number and parameters of the light sources in them, to eliminate complex and expensive electronic and electro-optical control units60344

laziness by light streams of writing beams in seismograph registers. In addition, it is essential to simplify the maintenance of FOB seismogram registrars by eliminating the need for tuning the light beam control units of writing beams, as well as to increase the reliability of seismograph registers by eliminating

10 complex electron and electron optical units replaced by an embedded plate of photochromic material.

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Claims (1)

A SEISMOGRAPH REGISTER containing sources of recording light beams and a recording medium is possible because, with a gell to increase the reliability of recording by automatic channel-by-channel self-adjustment of light fluxes of recording light beams in proportion to the speed of their movement through the recording medium, an additional plate made of photochromic material is introduced to it, mounted in front of the recording medium, perpendicular to the plane of movement of the writing light beams. * 1166034 2