RU2379716C2 - System to determine earthquake symptoms - Google Patents

Abstract

FIELD: instrument making.

SUBSTANCE: invention relates to radio electronics and can be used to determine earthquake symptoms. Proposed system, at least, one SLW transmitting device and, at least, two, receiving devices. Every SLW transmitting device consists of oscillator, power amplifier and transmitting aerial, all connected in series. At least, two receiving devices are arranged on one line, each consisting of receiving aerial and signal amplifier. Note here that proposed system comprises additionally the RF earthquake forecast center with modem, while receiving device comprises filter, amplitude metre unit, phase metre unit and reference signal and time generator.

EFFECT: increased reliability of forecast.

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Description

The invention relates to the field of electronics, in particular, can be used to determine the zones of occurrence of earthquake precursors.

A device for determining the precursors of an earthquake according to the patent of the Russian Federation No. 2256201. The device contains receiving and measuring modules of signals of phase radio navigation systems. Threshold blocks are connected to these modules. The outputs of the threshold blocks are connected to the signal inputs of the output data transmission unit for transmitting output data via a communication channel connecting the device to the center of the radio wave earthquake prediction. The device also contains a signal generator of the reference frequency and time, the control input of which is connected to the output of the block of binding time scales, and the output to the reference inputs of these modules, threshold blocks and transmission block of output data, as well as to the feedback input of the block of binding time scales the input of which is connected to the synchronizing output of the receiving module.

The disadvantage of this device is the low degree of localization of the zones of the alleged earthquake.

The closest analogue is the super-long-wave system according to the patent of the Russian Federation No. 2117399.

The system comprises a transmitting complex, consisting of control and synchronization equipment, a transmitting device and a transmitting antenna, and a receiving complex, consisting of a receiving antenna, connected in series through the antenna matching unit with a multi-channel receiver-indicator and recording equipment.

A disadvantage of the known device is the inability to determine the location of the alleged earthquake.

Figure 1 shows a variant of the structural diagram of the transmitting device of the system.

Figure 2 shows a variant of the structural diagram of the system.

Figure 3 shows a diagram explaining the principle of operation of the system.

Figure 4 shows the distribution and temporal characteristics of the signals.

In figure 1, the output of the generator 1 is connected to the input of the power amplifier 2, the output of which, in turn, is connected to the transmitting antenna 3.

The generator 1 can be performed by any known scheme. In the General case, the generator 1 has the ability to automatically or in another known manner to tune the frequency in accordance with the specified requirements, for example, in accordance with the schedule (figure 4).

The construction of power amplifiers 2 is also known.

The transmitting antenna 3 has a circular radiation pattern in the horizontal plane and can be made, for example, in the form of a whip antenna.

Figure 2 shows the structural diagram of the system. The system consists of N (N at least 2) receivers 4 and a center for radio wave earthquake prediction 14 with a modem 13. Each receiver 4 consists of a receiving antenna 5 connected to the input of the signal amplifier 6, the output of which is connected to the input of the bandpass filter 8, the output of which is connected to the first inputs of the amplitude measuring unit 9 and the phase measuring unit 10. The second inputs of the blocks 9 and 10 receive signals from the output of the reference frequency driver and time 7. From the outputs of the amplitude measuring unit 9 and phase measuring unit 10 the signals are fed to the input of the modem 11. The output of the modem 11 through the communication channel 12 is connected to one of the inputs of the modem 13 of the center of the radio wave earthquake prediction 14, which decides on the zones of the alleged earthquake.

The system operates as follows.

Transmitting devices located in various cities transmit a monochrome signal of a certain power and frequency in the super-long-wave (SDV) range (Fig. 4). The positive qualities of ultra-long-wave (SDV) radio waves:

- small attenuation with increasing distance, allowing you to receive signals at large distances;

- low dependence on atmospheric influences, which allows to achieve greater stability of signal reception.

The monochrome signal generated by the generator 1, amplified by a power amplifier 2, is emitted by a transmitting antenna 3 having a circular radiation pattern in the horizontal plane.

In the general case, the transmitter generator has the ability to tune the frequency.

The signal arrives at N receivers at receiving antennas 5 ¹ , 5 ² , ..., 5 ^N.

Depending on the distance of the receiving device from the transmitting device, the receiving signal from the antenna can be amplified a certain number of times by the signal amplifier 6.

After amplifier 6, the signal is fed to a band-pass filter 8, where the main frequency of the signal is extracted by suppressing interference signals.

After that, the signal goes to the amplitude measuring unit 9 and the phase measuring unit 10.

In the absence of signs of earthquake precursors, the signal at the output of these blocks will have a stable constant character.

In the event that signs of an earthquake appear on the propagation path of ADD radio waves caused by changes in radon concentration and / or changes in electromagnetic fields during the movement of the Earth's crust layers, long-term deviations of the phase and amplitude of the ADD signal will appear, which will be recorded by these blocks 9 and 10. For example, on the tracks propagation of VLF waves ³ 3 -4 3 -4 ⁶ and 3 ¹ -4 ² -4 ⁷ (3) when the signs of fracture cortical zone 15 at the receiving device 4, ⁶ and 4, ⁷ are fixed amplitude variation and phase of the received signal ositelno previously it received. But on the receiving devices 4 ³ and 4 ² changes in the phase of the signal and its amplitude are not fixed, as in other receiving points.

Processed information through modems 11 ¹ , 11 ² , ..., 11 ^N via communication channels 12 ¹ , 12 ² , ..., 12 ^N through modem 13 enters the center of the radio wave prediction of earthquakes 14, where all information from the receiving devices is processed.

It can be assumed that the area of the alleged earthquake is zone 17.

The signal generator of the reference frequency and time 7 is used to link the information received by blocks 9 and 10 to the time scale.

As the transmitting devices can be used ADD navigation stations in Novosibirsk, Krasnodar and Khabarovsk, operating in the range of 11.9, 12.6, 14.9 kHz [RF Patent No. 21177399]. Figure 4 shows the distribution and temporal characteristics of the signals of these stations.

The signal amplifier 6 can be made in the form of an amplifier with a normalized gain. The low frequency allows the use, for example, of operational amplifiers with negative feedback.

Band-pass filter 8 can be implemented as a narrow-band digital filter on a programmable logic integrated circuit (FPGA) or microprocessor.

Communication channels 12 can be used by any, for example, radio channels or optical fiber.

Corresponding communication channels are used and modems 11 and 13.

When two or more receivers are located on the same line, it is possible, due to geographical features, the installation of receivers with a deviation from the axis of not more than 5-7 degrees (30-50 km). Moreover, the characteristics of the system as a whole do not deteriorate.

The method for determining earthquake precursors is not described in detail, since it is clear from the description of the principle of the system.

Claims (1)

A system for determining earthquake precursors, comprising at least one ultra-long-wave transmitting device consisting of a series-connected generator, power amplifier and transmitting antenna, and at least two receiving devices, each of which consists of a receiving antenna and a signal amplifier, characterized in that in the system an earthquake prediction center for earthquakes with a modem is introduced, and a filter, an amplitude measuring unit, a phase measuring unit, a modem, and a reference signal conditioner are introduced into the receiving device frequency and time, while the receiving antenna of each receiving device is connected to the input of the signal amplifier, the output of which is connected to the input of the bandpass filter, the output of which is connected to the first inputs of the amplitude measuring unit and phase measuring unit, the second inputs of which are connected respectively to the first and second output of the driver signals of the reference frequency and time, and the outputs of the amplitude measuring unit and the phase measuring unit are connected respectively to the first and second input of the modem, which is connected via a communication channel to one of the inputs of the modem of the center of the radio wave earthquake prediction and at least two receiving devices are located on the same line.

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