RU26663U1 - DEVICE FOR GEOELECTRIC EXPLORATION - Google Patents

Abstract

A device for geoelectrical exploration, containing current and measuring electrodes, temperature sensors, a holder of temperature sensors, a ballast weight and a float, characterized in that the device for measuring temperature is additionally introduced into the device, and thermistors are selected as temperature sensors, while the ballast weight is made in the form telescopic dielectric bar, on which current and measuring electrodes are mounted, and the holder of temperature sensors is made in the form of a telescopic dielectric st rzhnya with placed thereon thermistors connected to the device for measuring the temperature, the lower end of the rod is pivotally connected to the middle bar, the upper end of the rod connected to the float and the electrodes and thermistors are connected respectively to the beam and the rod via quick couplings.

Description

DEVICE FOR GEOELECTRIC EXPLORATION

The utility model relates to geophysics and is intended for conducting geophysical studies in shallow reservoirs (depth of not more than 15 meters) by the method of electric sounding.

Known devices for electrical sensing, which are usually performed using two vessels, which received the name of the supply and receiving. The generating vessel of direct current, as well as the control station of this installation, a winch with a special power cable, etc. are located on the supply vessel, and recording equipment, cable for receiving lines and other auxiliary equipment are located on the receiving vessel. Both vessels are equipped with receiving equipment for phase radio-geodetic systems, as well as operational radio stations. Autonomous receiving bottom buoy stations are also beginning to be used, which make it possible to perform soundings with the help of only one - a feeding vessel ("Electrical Exploration. Geophysics Handbook. -M .: Nedra, 1978, p. 78).

But these devices are bulky, inefficient and not suitable for work in shallow reservoirs.

Closest to the proposed combination of features is a device for geophysical observations in reservoirs containing current and measuring electrodes, temperature sensors, a ballast weight, a holder of temperature sensors and a float (Geophysical prospect., 1974, v. 22, No. 3, p. 381 -392).

However, this device is not accurate enough and reliable.

The task to which the proposed utility model is directed is to increase the accuracy of the device and its reliability.

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To solve this problem, a device for measuring temperature was additionally introduced into a device for geophysical observations in ponds containing current and measuring electrodes, temperature sensors, a ballast weight, a holder of temperature sensors and a float, and thermistors were chosen as temperature sensors. In this case, the ballast weight is made in the form of a telescopic dielectric bar, on which current and measuring electrodes are installed. And the holder of temperature sensors is made in the form of a telescopic dielectric rod with thermistors placed on it, connected to a device for measuring temperature. Moreover, the lower end of the rod is pivotally connected to the middle of the beam, the upper end of the rod is connected to the float, and the electrodes and thermistors are connected respectively to the beam and the rod using quick disconnect connections.

An additional instrument for measuring temperature registers the temperature of the aqueous medium (thickness) recorded by thermistors.

The choice of thermistors as temperature sensors increases the accuracy of the device due to temperature measurements directly in the aquatic environment (thicker), because this excludes the rise of temperature sensors (thermistors) to the surface of the water.

The implementation of the ballast weight in the form of a telescopic beam allows you to set the required dimensions between the current and measuring electrodes.

And the implementation of a telescopic beam of dielectric material eliminates electrical contact ("breakdown" between the electrodes.

The implementation of the holder of the temperature sensors in the form of a rod makes the structure rigid, allows you to accurately and fixedly position the thermistors.

A rod made of a dielectric material eliminates electrical contact ("breakdown") between the thermistors.

The swivel connection of the lower end of the rod to the middle of the beam eliminates the breakdown of the installation in conditions of strong flow of water flows.

The connection of the upper end of the rod with the float helps to keep the rod in a vertical (working) position, while simultaneously allowing the installation location to be fixed with a float.

And connecting the electrodes and thermistors to the bar and the rod, respectively, using quick-disconnect connections simplifies and speeds up the preparation of the device for work, as well as its dismantling.

In fig. A schematic diagram of a device for geoelectrical exploration in water basins is presented.

The device for geoelectrical exploration (Fig.) Consists of current (AB) 1 and measuring (MN) 2 electrodes connected by wires 3 to a recording device 4; thermistors 5 connected via wires 6 to a device for measuring temperature 7; ballast cargo 8; holder of temperature sensors (thermistors 5) 9; float 10; quick connectors 11 and swivel 12.

On ballast weight 8, made in the form of a telescopic dielectric bar, 11 current 1 and measuring 2 electrodes are installed using quick disconnect connections.

And on the holder of the temperature sensors 9, made in the form of a rod, thermistors 5 are also placed using quick disconnect connections 11.

The lower end of the rod 9 by means of a swivel joint 12 is connected with the middle of the beam 8, and the upper end of the rod 9 is connected to the float 10.

A device for geoelectrical exploration (Fig.) Works as follows.

Pre-measure, for example, with the help of an echo sounder (not shown) the depth of the reservoir.

Then, a telescopic dielectric beam 8 is lowered and laid on the bottom of the reservoir, which is a ballast weight, on which current 1 and measuring 2 electrodes are installed using quick disconnect connections 11, the distances between which are established before starting work. The current 1 and measuring 2 electrodes are connected via wires 3 to a recording device 4 (for example, a computer-based electrical prospecting measuring device MARI).

Using the float 10 and the swivel joint 12, the telescopic dielectric rod 9, which is the holder of the temperature sensors (thermistors 5), is installed in the vertical (working) position. The height of the rod 9 is set equal to the depth of the reservoir. On the rod 9 connected to the beam 8, are placed using quick disconnect connections 11 (for example, "Quick disconnect connections A. S. Gusev. - AC No. 1776890, F 16 V 2/00. Publ. 23.11.92 Bull.) Thermistors 5, which are connected via wires 6 to a temperature measuring device 7 (for example, low-inertia depth equipment of the MGA-5M type).

The voltage from the power sources (not shown) is applied to the current electrodes 1, while the secondary field strength, which is used to determine the resistivities of the bottom sediments, is recorded using measuring electrodes 2 with a device 4.

At the same time, the temperature of the aqueous medium, which is taken into account when interpreting the data on the resistivities of bottom sediments, is recorded at the required depths using thermistors 5 with instrument 7.

By the magnitude of the secondary field intensity, taking into account the temperature of the aquatic environment, they judge the geological structure of bottom sediments.

Claims (1)

A device for geoelectrical exploration, containing current and measuring electrodes, temperature sensors, a holder of temperature sensors, a ballast weight and a float, characterized in that the device for measuring temperature is additionally introduced into the device, and thermistors are selected as temperature sensors, while the ballast weight is made in the form telescopic dielectric bar, on which current and measuring electrodes are mounted, and the holder of temperature sensors is made in the form of a telescopic dielectric st rzhnya with placed thereon thermistors connected to the device for measuring the temperature, the lower end of the rod is pivotally connected to the middle bar, the upper end of the rod connected to the float and the electrodes and thermistors are connected respectively to the beam and the rod via quick couplings.