RU215581U1 - AUTONOMOUS SEISMIC DATA RECORDER - Google Patents

Abstract

The utility model relates to geophysical equipment, namely to cableless telemetry devices. The device for autonomous seismic data recording has a body with a metal pin, with a lithium-polymer battery built into the body, spring-loaded contacts located under the cover of the body to ensure the charge of the internal battery and to read data from the device’s memory without preliminary disassembly of the device using the Ethernet protocol, a board with located on it are electronic memory devices, an amplifier with a differential input, an ADC, a processor, a module with a Wi-Fi antenna, a module with a GPS antenna, an analog geophone, which is installed in the lower part of the case to ensure reliable contact with the pin, characterized in that an analog geophone is used with a sensitivity 4.6 times higher than a traditional geophone type GS20DX, the case is sealed to IP68, and is made of shock-resistant plastic.

Description

The utility model relates to geophysical equipment, namely to cableless telemetry devices.

From the prior art, an autonomous recording unit is known, containing a housing with a removable cover, a battery, an amplifier, an analog-to-digital converter (ADC), a module with a wi-fi antenna, a module with a GPS antenna, an electronic memory board, characterized in that it has a built-in an analog geophone designed to convert mechanical vibrations of the earth's surface into an electrical impulse with its subsequent transfer to an amplifier and ADC for conversion into a digital code and recording into electronic memory. Also known is a cableless seismic data recording device (Utility Model Patent of the Russian Federation No. 199415 Cableless seismic data recording device), characterized in that instead of an analog geophone, a molecular-electronic sensor is installed in the device to operate at low frequencies. Since the sensor is active and requires power, the power consumption of the device increases and, accordingly, the time of continuous recording is significantly reduced. Also, the disadvantage is the dependence of the sensitivity on the ambient temperature, which limits its use in a wide range of temperatures.

The task to be solved by the utility model is to increase the sensitivity when registering a wide range of seismic signals and increase the consumer possibilities of using this device in the process of geophysical research in a wide temperature range from -40 to +70 degrees Celsius.

The technical result of the claimed utility model is an increase in sensitivity to weak seismic signals and, accordingly, an expansion of the dynamic range of registration of useful seismic signals by using a GS-ONE analog geophone that does not require power supply, which has an increased sensitivity by 4.6 times relative to the widely used GS-20DX geophone, and , as a result, an increase in the information content of the geological environment.

This technical result is achieved due to the fact that the device for autonomous recording of seismic data has a housing with a metal pin, with a lithium polymer battery built into the housing, spring-loaded contacts located under the housing cover to charge the internal battery and to read data from the device's memory without first disassembling the device. using the Ethernet protocol, a board with electronic memory devices located on it, an amplifier with a differential input, an ADC, a processor, a module with a Wi-Fi antenna, a module with a GPS antenna, an analog geophone that is installed in the bottom of the case to ensure reliable contact with the pin , characterized in that they use an analog geophone with a sensitivity 4.6 times higher than that of a traditional geophone such as GS20DX, the case is sealed, according to IP68 and is made of impact-resistant plastic.

The device is illustrated by drawings, which show a block diagram of the device for autonomous registration of seismic data (Fig. 1) and a general view of the device for autonomous registration of seismic data (Fig. 2).

Positions in the drawings indicate:

1 - subblock "Controller",

2 - subblock "Analogue device",

3 - analog geophone,

4 - power supply device with a lithium polymer battery,

5 - GPS receiver,

6 - WiFi/Bluetooth module,

7 - processor,

8 - LAN module,

9 - amplifier,

10 - analog-to-digital converter,

11 - Flash memory,

12 - spring-loaded contacts.

The device for autonomous recording of seismic data includes the following units and blocks:

Subunit controller 1, which provides control and synchronization of nodes and blocks;

Subblock "Analogue device" 2, which provides preliminary amplification and subsequent conversion into a digital code of an analog seismic signal coming from the built-in analog geophone;

Analogue geophone 3, providing reception of seismic signals in a wide dynamic range;

A power supply device that provides power to all nodes and blocks.

The subunit "Controller" 1 includes a GPS receiver 5, a Wi-Fi/Bluetooth module 6, a processor 7, a LAN module 8, a Flash memory 11;

Subblock "Analogue device" 2 includes an amplifier with a differential input 9 and an analog-to-digital converter (ADC) 10.

The device for autonomous seismic data recording has a plastic case with a metal pin and a cover. A lithium-polymer battery is built into the case. There are spring-loaded contacts on the case cover for charging the internal battery and for reading data from the device's memory without first disassembling the device using the Ethernet protocol. The case also contains a board with a processor, electronic memory, a 24-bit ADC, an amplifier with a differential input, a module with a wi-fi antenna, a module with a GPS antenna, a LAN module and a power supply device without a lithium polymer battery. A geophone with high sensitivity and non-linear distortion less than 0.05% is installed in the lower part of the body to ensure reliable contact with the pin, which is buried in the ground to receive weak signals coming from the earth's surface as a result of the excitation of the latter by various types of seismic sources.

For ease of use of the device at a wide range of temperatures from -40 to +70 degrees Celsius, all modules, including the analog geophone, are installed in one sealed plastic case according to IP68.

In the claimed device, different types of analog geophones can be used, differing in natural frequency, frequency range, input impedance

The device works as follows. The operator installs the device on the earth's surface, deepening it by means of a pin to a shallow depth. Turns on the power of the device by bringing the magnet to the body of the device. The device is put into operation and determines the coordinates of the installation site and is synchronized by the satellite signal. When the seismic source creates vibrations of the earth's surface and the reflected waves arrive at the input of the device, the geophone receives mechanical vibrations and converts them into an electrical signal, which is fed sequentially to an amplifier and a 24-bit analog-to-digital converter for digitization and subsequently recorded in the device's memory. Further, the signal can be retrieved from the device's memory via the Wi-Fi module for further processing in the computer center.

Claims (2)

1. A device for autonomous seismic data recording, containing a housing with a metal pin, a seismic sensor installed in the lower part of the housing to ensure reliable contact with the pin, connected to an analog device having an amplifier connected to an analog-to-digital converter located on a board located inside the housing , which also contains a processor, electronic memory, a module with a wi-fi antenna, a module with a GPS antenna, a LAN module and a power supply device, and an analog seismic sensor of the GS-ONE type is selected as a seismic sensor, and an amplifier with a differential input as an amplifier, and the ADC is 24-bit. 2. The device according to claim 1, characterized in that the housing is sealed, made of impact-resistant plastic according to IP68.

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