SU28669A1 - Electrical device for recording soil vibrations - Google Patents

Description

When using instruments using a seismograph system for recording soil oscillations for practical purposes, such as: mining reconnaissance, soil reliability testing during construction, etc., it is necessary that the instrument be as sensitive as possible, more compact, have a small weight, would not easily susceptible to damage, tolerated. feces a simple appeal and would be easily and quickly portable and install.

The proposed electrical device for recording soil vibrations is based on the use of the properties of two- and three-electrode electron tubes. In the first case, when the distance between the anode and the cathode is changed, the strength of the anodic current changes, and in the second. By changing the distance between individual turns of the grid, the permeability of the lamp changes. To dampen the system, constants serve; magnets and silver plates.

In FIG. 1 is a schematic view of an electrical device for recording soil oscillations with a two-electrode electron tube; FIG. 2 tr., With a three-electrode lamp.

In an electric device for recording soil oscillations with a two-electrode lamp, as the distance between the anode and cathode of the electron tube changes to hundredths of a millimeter or even less, the anode current of the lamp changes. The device consists of a glass balloon 7, (Fig. 1), in which there is a moving load 2 (weighing a few grams), suspended on a steel spring 3. On the load 2 a magnet 4 is fixed, and on the balloon 7 a silver ring is put on 5 for damping. Load 2 is the anode and has pin 6. The cathode is a filament 7 with leads 8. In order to prevent the anode from touching the cathode with a strong jog, the safety stops 9 serve. The outputs vt 6 include the device in the corresponding amplifying circuit, the output of which turns on the record indicator. As an indicator can be used any recorder. .

Modifying the device with the adventure of a three-electrode lamp is based on the fact that when the distance between the turns of the triode grid changes, its permeability changes dramatically.

The device consists of a cylinder J. (Fig. 2), in which there is a load 2 suspended on a spring 3. Spring 3 is a net and has a pin 77. Inside the net, the filament has a filament 72 and has B terminals 75. Around net 3 is

an anode 14 having a terminal 75. At the anode 14, a permanent magnet 4 is held between the poles, of which silver is placed on the plate 10, attached to the load 2 for the purpose of damping. With pins 11, 13, and 15, the device is included in the appropriate amplifying circuit with a recording indicator.

Item made from shadows.

1. An electrical device for registering no4fbi oscillations, characterized in that the anode of a two-electrode electron lamp is made in the form of a load 2 suspended on a spring 5, in order to register the oscillations by recording, by one or another recording device, changes in the anodfig power.

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N 1 1 T I

Claims (2)

1, 1 A M V8 current with varying anode and cathode distance. 2. A device variation according to claim .1, characterized in that the spring 3 used to support the load 2 is a grid of a three-electrode lamp, in order to record the oscillations by measuring changes in permeability as the distance between individual turns of the grid changes. 3 .When using the device according to claims 1 and 2, the use of permanent magnets and silver plates to effect the damping system. 4. When using the device according to claim 1, the use of stops 9 serve to prevent contact between the anode and the cathode,. figs 13 11 / jj l 1/13 H 1 f F