RU2739023C1 - Apparatus for searching for subsurface objects - Google Patents

Abstract

FIELD: search equipment.

SUBSTANCE: invention relates to search equipment and can be used for non-contact detection of mines and mine-like objects, engineering networks, as well as search for archaeological values. Disclosed is a device for searching for subsurface objects, comprising seismoacoustic generator (1), a radio wave sensor for determining conductivity and dielectric penetrability of soil (8), parametric radar (9), a control unit. Novelty is that the device comprises a portable search module (3), which is body (6) mounted on rod (5), in which an inductive metal detector (7) is placed, radio-wave sensor (8) and parametric radar (9) with a combined receiving-transmitting antenna, which form three circuits for obtaining information and transmitting it along the corresponding search channels. On rod (5) there is also a unit for processing signals of search channels (10) and an indication and control unit (11). At the same time outputs of metal detector (7), radio wave sensor (8) and parametric radar (9) are connected to signal processing unit (10), output of which is connected to input of indication and control unit (11). Seismoacoustic generator (1) is moved from the search zone and remotely removed from the portable search module (3).

EFFECT: high information value of the device owing to use of a three-channel portable search module.

1 cl, 3 dwg

Description

The invention relates to search technology and can be used for the non-contact detection of mines and mine-like objects, engineering networks, as well as the search for archaeological values.

Known device for combined search for subsurface objects using a two-channel mine detector based on the use of an induction metal detector and a radio wave sensor for determining the conductivity and dielectric constant of the soil (GPR). In this case, the search for objects containing metal elements is carried out by an induction sensor, and the location of non-metallic elements is determined using a GPR (patent US 8174429 B2, publication date 05/08/2012).

The disadvantage of the analogue is a large number of false alarms as an induction detection channel, which reacts to all metal objects in the search area, and a GPR, which registers the boundary of an object by measuring the dielectric constant, which is different from the contained medium. In this regard, in case of large littering of the territory with metal objects, as well as in the presence of objects with sizes larger than the capture sector of the mine detector, additional exploration work is necessary, which leads to a decrease in the speed of search operations and their safety.

A device is known for implementing a method for searching for objects of artificial origin in the ground, based on the excitation of a search object at the frequency of its mechanical resonance with a seismoacoustic signal and simultaneous irradiation with a radar signal with registration of the reflected echo of the target. In this case, the device for searching for objects of artificial origin in the ground contains a radar with a transmitter and a receiver, a switched transmitting-receiving antenna, a serially connected storage device, a microcontroller and a computer, as well as a microwave generator, a unit for measuring the distance from the search installation to the object of search, a reference acoustic signal generator, a seismoacoustic signal source acting on the base plate (patent RU 2390801, priority date 12/16/2008, publication date 05/27/2010, author Shaidurov G.Ya., RU).

The disadvantage of the known analogue is the increased probability of missing the search object due to a rather wide spot of the radar directional pattern on the earth's surface compared to the size of the sought object.

As a prototype, a device for searching for mines and minefields was adopted, used in the implementation of methods for searching for hidden objects in the ground, based on the excitation of seismoacoustic and sounding radar signals, including a seismic acoustic signal generator mounted together with a base plate in a sleigh towed by a base vehicle, in which contains computerized control panels equipped with control panels and monitoring displays. A transmitting antenna is installed on the roof of the vehicle. Remote-controlled small-sized self-propelled carriers of search elements, connected to computerized control panels by cable or radio channel lines for transmitting operational data for reconnaissance of the underlying surface, are placed outside the vehicle. In this case, self-propelled carriers of search elements are a group of receivers, each of which is equipped with an antenna system in the form of a transverse frame with radar sensors installed on it for reading mechanical vibrations of the soil and radio wave sensors for determining the conductivity and dielectric constant of the soil (RF patent No. 2681271 C1, priority date 17.05 .2018, publication date 03/05/2019, author Shaidurov R.G., RU, prototype).

The disadvantages of the prototype are: the use of two information retrieval channels, as well as high energy consumption, large dimensions of equipment and labor costs in preparation for use.

The technical problem solved by the invention is the creation of a portable compact device for searching subsurface objects, which has increased information content due to an additional information retrieval channel - an induction metal detector with a decrease in energy consumption and labor costs during use.

To solve a technical problem, a device for searching subsurface objects is proposed, which contains a seismic acoustic generator, a radio wave sensor for determining the conductivity and dielectric constant of the soil, a parametric radar, and a control unit. The novelty is that the device contains a portable search module, which is a housing mounted on a rod, in which an induction metal detector, a radio wave sensor and a parametric radar with a combined receiving and transmitting antenna are located, forming three schemes for receiving information and transmitting it through the corresponding search channels, to the boom is also equipped with a signal processing unit for search channels and an indication and control unit, while the outputs of the metal detector, radio wave sensor and parametric radar are connected to the signal processing unit, the output of which is connected to the input of the indication and control unit, and the seismoacoustic generator is removed from the search area and remotely removed from the portable search module.

FIG. 1 schematically shows a device for searching for subsurface objects, general view; in fig. 2 shows an enlarged view of the portable search module; in fig. 3 is a block diagram of a portable search module.

The device for searching subsurface objects contains a seismoacoustic generator 1, generating a seismic wave 2, and a number of portable search modules 3 for detecting a search object 4. In this case, the seismoacoustic generator 1 is remotely removed from the portable search modules. The portable search module 3 is a housing 6 mounted on a rod 5. The housing 6 contains an induction metal detector 7, a radio wave sensor 8 and a parametric radar 9 with a combined transceiver antenna (not shown conventionally). On the rod 5, a signal processing unit for search channels 10 and an indication and control unit 11 are also installed. In this case, the outputs of the metal detector 7, radio wave sensor 8 and parametric radar 9 are connected to the signal processing unit 10, the output of which is connected to the input of the indication and control unit 11, as is shown in FIG. 3 block diagram of the portable search module.

The device for searching subsurface objects works as follows. Before starting work, a seismic-acoustic generator is turned on 1. The seismic wave 2 generated by it causes forced mechanical vibrations of the shell of the search object 4. The search for objects is carried out using portable search modules 3. When one or several search channels are triggered, the object 4 is identified by the main received information signs: presence metal, depth of occurrence, resonance frequencies at which the shell of the object is excited 4.

The inclusion of a parametric radar 9 in the device for the search for subsurface objects, recording the vibration of the shell of the search objects, arising under the influence of a seismic wave 2 generated by an external seismic acoustic generator 1, makes it possible to supplement the observed signals from the outputs of the induction metal detector 7 and the radio wave sensor for determining the conductivity and permittivity of the soil 8 (GPR) with new information parameters: amplitude, frequency and duration of forced vibrations. The obtained characteristics of the search object 4 are compared by calculating the cross-correlation function (CCF) with the acoustic characteristics previously recorded in the signal processing unit of the search channels 10, which makes it possible to selectively search and determine the specified objects.

The cross-correlation function is calculated by the formula:

where R (τ) is the cross-correlation function;

T is the observation time of the impulse response of the object;

- нормированные по энергии соответственно ожидаемая импульсная характеристика объекта поиска и наблюдаемая на выходе приемника параметрического радиолокатора,

- energy-normalized, respectively, the expected impulse response of the search object and observed at the output of the parametric radar receiver,

τ is the time shift parameter.

Thus, the technical result achieved by the invention consists in increasing the information content of the device through the use of a three-channel portable search module.

Additional advantages of the device also include: simplification of the device, reduction of energy consumption and labor costs during use.

Claims (1)

A device for searching for subsurface objects containing a seismic acoustic generator, a radio wave sensor for determining the conductivity and dielectric constant of the soil, a parametric radar, a control unit, characterized in that the device contains a portable search module, which is a housing mounted on a rod, in which an induction metal detector, a radio wave sensor are located and a parametric radar with a combined receiving and transmitting antenna, forming three schemes for receiving information and transmitting it through the corresponding search channels, a signal processing unit for search channels and an indication and control unit are also installed on the boom, while the outputs of the metal detector, radio wave sensor and parametric radar are connected to a signal processing unit, the output of which is connected to the input of the indication and control unit, and the seismoacoustic generator is removed from the search area and remotely removed from the portable search module.

Images