RU2332684C1 - Multi-position radio detection method and device for implementing method - Google Patents

Abstract

FIELD: radio technology.

SUBSTANCE: invention pertains to location technology particularly to methods of constructing multi-position radar systems. The multi-position radar involves emission of radar impulses, synchronised receiving of reflected signals by an apparatus for different positions, combined processing of signals and information for detecting the target, measurement of their coordinates, determination of trajectory parameters and subsequent identification. According to the proposed invention, using the apparatus for different positions, the radiation is synchronised and the signals are received using a power line. The multi-position radar device has a unit for processing information, joined by communication lines and synchronisation channels to the apparatus for different positions. The apparatus for different positions is connected to power lines.

EFFECT: realising main advantages of multi-position systems.

2 cl, 1 dwg

Description

The invention relates to location technology, in particular to methods for constructing multi-position radar systems.

Known methods of high-frequency communication on power lines (power lines) [for example, Mikutsky G.V., Skitaltsev B.C. High frequency power line communications. A textbook for students of energy and energy engineering schools. Vol. 2, rev. and add. M .: Energy, 1978], based on the emission and reception of high-frequency (HF) signals in power lines through the equipment of the RF connection.

These communication methods are focused on solving the problems of transmitting and processing information, and not for radar.

Known location methods for determining the location of damage to power lines [for example, Shalyt G.M. Determination of places of damage in electrical networks. - M .: Energoizdat, 1982], including with the use of complex signals [Kulikov A.L., Kulikov D.A. Patent No. 2269789 “Method for determining the location of damage to power lines and communications and a device for its implementation”, 02/10/2006, Bull. No. 4, G01R 31/11. INC].

However, these location-based methods are aimed at identifying damage in power lines, and not for radar tasks.

Known methods for determining the shortest distance to a high-voltage power line from the aircraft [for example, Yablonsky V.M., Terekhova L.A. Patent No. 2260198 “A method for determining the shortest distance to a high voltage power line from an aircraft,” September 10, 2005, G01S 13/93, G08G 5/04].

However, these methods are based on the on-off reception of signals emitted by power lines, usually of industrial frequency.

Known methods of multi-position radar [for example, Chernyak B.C. Multiposition radar. - M .: Radio and communications, 1993], as well as spaced radar stations and systems [for example, Averyanov V.Ya. Diversity radar stations and systems. Mn., "Science and Technology", 1978], which have significant advantages compared with traditional single-position radar systems.

However, these methods and systems are not intended to form probing and process signals reflected by targets in power lines.

The closest technical solution to the proposed invention is a method of multi-position radar implemented in a multi-position radar system [Bakulev P.A. Radar systems. Textbook for high schools. - M .: Radio engineering, 2004, p.21], which includes equipment of spaced positions, information transmission channels, synchronization channels, and an information processing point.

A multi-position radar method consists in emitting radar signals, synchronized reception of reflected signals by equipment of diversity positions, combining and jointly processing signals and information of diversity positions in the information processing center for detecting targets, measuring their coordinates, determining trajectory parameters and subsequent identification.

This method of multi-position radar allows you to realize the main advantages of multi-position systems compared to single-position [Bakulev P.A. Radar systems. Textbook for high schools. - M .: Radio engineering, 2004, p.21]:

- the possibility of forming complex spatial viewing areas;

- the best use of energy in the radar system;

- greater accuracy in measuring the location of targets in space;

- increasing noise immunity with respect to active and passive interference, as well as increasing the reliability of the tactical mission.

The essence of the invention is to increase these advantages through the use of radiation and the reception of high-frequency signals of power lines.

This problem is solved by the method of multi-position radar, which consists in emitting radar signals, synchronized reception of reflected signals by the equipment of diversity positions, combining and jointly processing signals and information to detect targets, measure their coordinates, determine the parameters of the trajectories and subsequent identification, in which, according to the invention, the equipment of diversity positions carry out synchronized emission and reception of signals using power lines.

The prerequisites for increasing the previously indicated advantages in the proposed method of multi-position radar are as follows.

1. Power lines have a large length and can be combined into various antenna systems using RF connection equipment.

Since the potential accuracy of measuring the angular coordinates of targets (standard error of measuring the angular coordinates) [Shirman Ya.D., Manzhos VN The theory and technique of processing radar information against the background of interference. - M .: Radio and communications, 1981, pp. 214-216.] Depends on the signal-to-noise ratio, as well as the ratio of the antenna aperture to wavelength, the use of extended power lines will allow measuring the angular coordinates of targets with higher accuracy.

2. The complex configuration of the power lines, as well as the wide possibilities for their reservation significantly increase the reliability of such a multi-position radar system. In addition, it should be noted that for one power line, as a rule, the RF connection equipment is located on all three phases (A, B, C), therefore, each of the phases can be used to solve problems of multi-position radar.

However, it should be noted the features of the proposed method of multi-position radar.

1. Since the propagation of RF signals in power lines has a number of features [Hayashi S. Waves in power lines. - M .: Gosenergoizdat, 1960.], then the study and joint processing of received signals from targets by the equipment of diversity positions and the information processing point are specific. Specificity is primarily associated with the dispersing properties of power lines as a medium for transmitting RF signals, and the difference between the phase and group velocities of their propagation.

2. To one power line (or several power lines connected by high-frequency connections) through the equipment of high-frequency connection can be connected to the transceiver equipment of several spaced positions. Thus, synchronized joint emission of RF signals into one power line will allow for the implementation of complex, rapidly changing electromagnetic field distributions in large spatial territories. However, such additional features lead to difficulties in the formation of control of spatial viewing zones.

3. The complex configuration of power lines, the presence of power lines of different classes of voltages and their mutual influence lead to processing features that significantly distinguish it from traditional methods of multi-position radar and signal processing in phased array antennas [Radio-electronic systems: the basics of construction and theory. Handbook / Ed. J.D. Shirman. - M.: ZAO MAKVIS, 1998].

In addition, we indicate that devices that implement the proposed method of multi-position radar can be used not only for solving radar problems (detection, measurement of coordinates and target parameters, etc.), but also for diagnosing the location of power line damage.

The proposed method can be implemented by a device containing an information processing point connected by communication channels and synchronization channels with diversity equipment, which is connected to power lines through high-frequency connection equipment.

Note that for synchronization, instead of the corresponding channels in the proposed device, satellite navigation systems (for example, GPS) can be used.

The drawing shows a structural diagram of a device that implements the proposed method.

The device comprises an information processing point 1, communication channels 2, synchronization channels 3, equipment of diversity positions 4, high-frequency connection equipment 5, power lines 6.

The information processing point 1 is connected by communication channels 2 and synchronization channels 3 with equipment of diversity positions 4, which is connected to power lines 6 through high-frequency connection equipment 5.

Consider the operation of the device as an example of location of air targets. Moreover, the device for multi-position radar can operate in active, passive and active-passive modes.

The most common is the active-passive mode, when radiation into the space of radar signals occurs by the equipment of one or several separated positions 4, and the reception of reflected signals from air targets is carried out by all available equipment 4.

Depending on the use of 4 phase information contained in space positions of the phase information contained in the signals reflected from air targets, a variant of spatially coherent, with short-term spatial coherence, and spatially incoherent processing is implemented [P. Bakulev. Radar systems. Textbook for high schools. - M .: Radio engineering, 2004, p.21-22]. However, in contrast to the listed known processing options, the proposed device takes into account the characteristics of the propagation of signals through power lines 6. These primarily include:

- the dependence of the propagation speed of high-frequency signals on the design parameters of power lines 6 (wire brand, suspension height, etc.);

- dispersing devices of power lines 6 (different characteristics of the propagation of high-frequency signals through power lines at different frequencies);

- the weather dependence of the characteristics of power lines 6, primarily reactance, as well as the dependence of the latter on the resistivity of the Earth;

- the presence of specific active and passive interference caused, for example, by operating systems of high-frequency communications, relay protection, corona discharges, as well as the influence of neighboring power lines 6 and others;

- a number of other factors.

However, it is possible to reduce the influence of these factors. In this case, the information obtained as a result of processing the signals received from the power transmission line 6 is adjusted by comparing it with the information and signals received by the equipment of the separated positions 4 from other radar means. A reverse phenomenon is also possible when the information and signals received from power lines 6 supplement or correct the information and signals received from other radar means of the equipment of diversity positions 4.

In the information processing point 1, there is a combination of coherent signals, video signals, detected marks of air targets, the results of a single measurement of parameters, as well as the combination of trajectories.

When coherently combining, high-frequency signals from the equipment of diversity positions 4 are received at the information processing point 1, where all the operations of detecting, identifying and determining motion parameters of an air target and its location are performed. Compensation of factors caused by the specific conditions for the propagation of high-frequency signals through power lines 6 is performed at the information processing point 1. In this case, the equipment of the diversity positions 4 is simple, and the information processing point is complicated 1. In addition, wideband information transmission channels 2 with high throughput are required ability.

When combining trajectories of air targets, signals from the equipment of the spaced positions 4 are received at the information processing point 1 after secondary processing and rejection of false marks of targets. Compensation of factors caused by the specific conditions for the propagation of high-frequency signals through power lines 6 is carried out by the equipment of diversity positions 4. Therefore, most of the computational operations are performed by the equipment of diversity positions 4, which is more complex. The equipment of the information processing point 1 is simplified, and the information transmission channels 2 operate in lighter conditions.

Thus, the use of power lines 6 with high-frequency connection equipment 5 in the device (see the drawing) makes it possible to realize additional information and energy capabilities for multi-position radar.

Claims (2)

1. The method of multi-position radar, which consists in the emission of radar signals, the synchronized reception of reflected signals by the equipment of diversity positions, combining and jointly processing the received signals and information of the diversity positions received from other radar means, in the information processing point, designed to detect targets, measure their coordinates , determining the parameters of the trajectories and subsequent identification, characterized in that additionally by equipment of spaced positions connected using high-frequency power line connection equipment (power lines), synchronized emission and reception of signals using power lines, then, when processing the information received, the information received as a result of processing signals received from power lines is adjusted by matching it with the signals reflected from the goals received by the equipment of the diversity positions, and with the information received by the equipment of the diversity positions from other radar means. 2. A device for multi-position radar, containing diversity equipment for emitting radar signals, synchronized reception and processing of reflected signals, an information processing unit for detecting targets, measuring their coordinates, determining parameters of target trajectories, their location and subsequent identification, connected communication channels and synchronization with equipment diversity positions, characterized in that the equipment diversity positions additional connected with power lines (power lines) through high-frequency connection equipment, providing synchronized joint emission of high-frequency signals by spaced positions in power lines, while the information processing point is configured to combine and correct information received as a result of processing signals received from power lines by comparing it with signals reflected from targets received by equipment of spaced positions, and with information from other radar means received paratus spaced positions.