Shipborne navigation radar reconnaissance alarm system

Abstract

The invention discloses a ship-borne navigation radar reconnaissance alarm system. A radio frequency front end module (2) comprises a radio frequency switch module (21) and an X-waveband down-conversion module (22); the differential GPS module (3) comprises a GPS antenna (32) and a GPS receiving module (31); wherein the shipborne navigation radar reconnaissance alarm system realizes detection and direction finding functions of radar signals of a target area; and the shipborne navigation radar reconnaissance alarm system is connected with the main control computer through a network cable. The system has the functions of navigation radar signal receiving and full pulse sorting; according to the invention, the equipment has the functions of self-testing and fault diagnosis; the device has the function of measuring parameter output; the invention has the function of azimuth measurement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship navigation technology, in particular to a ship navigation radar reconnaissance warning system. BACKGROUND

[0002] The ship navigation is used for measuring the navigation radar signal radiated by the surrounding ships on the sea, and the navigation radar signal of the target area is detected and measured, and the measurement result pulse description word is output.

[0003] The current ship navigation has the following technical problems: the current ship navigation radar system transmits radio waves and receives the echo of the radio waves transmitted from the target to determine the direction and distance of one or several fixed objects relative to the ship. The system uses radio detection technology to receive the radio waves transmitted by the nearby ship radar, and detects and measures the direction of the nearby ship relative to the ship, and gives an alarm according to the test results. SUMMARY

[0004] In order to solve the above problems existing in the prior art, the present application provides a ship navigation radar reconnaissance warning system.

[0005] The technical scheme adopted by the present application to solve its technical problems is:

[0006] A ship navigation radar reconnaissance warning system, comprising a horn antenna array 1, a radio frequency front end module 2, a differential GPS module 3, a signal processing module 4, and a power supply module 5. The radio frequency front end module 2 comprises a radio frequency switch module 21 and an X-band down-conversion module 22. The differential GPS module 3 comprises a GPS antenna 32 and a GPS receiving module 31. The ship navigation radar reconnaissance warning system realizes the detection and direction finding function of the radar signal of the target area. The ship navigation radar reconnaissance warning system is connected to the host computer through a network cable.

[0007] The present application also has the following additional technical features:

[0008] As a further specific optimization of the technical scheme of the present application: the horn antenna array 1 is composed of 6 constant beam antennas, the center pointing angle of any 2 adjacent antennas is 60°, the omnidirectional antenna covers a range of 360°, and is used for monitoring the navigation radar signal in the frequency band of 9.3GHz-9.5GHz, providing information for phase and amplitude correction and azimuth solution in data processing; the 6 constant beam antennas are uniformly distributed in a circle, the direction of each antenna is Figure One consistent, and the parameter index is consistent.

[0009] As the further specific optimization of the technical scheme of the present application: the radio frequency front end module 2 comprises a radio frequency switch module 21 and an X wave band down conversion module 22, the radio frequency switch module 21 realizes the switching of the antenna channel and the switching selection of the horn antenna array 1 signal, and sends the selected signal to the X wave band down conversion module 22, and the X wave band down conversion module 22 realizes the down conversion of the X wave band signal to the intermediate frequency signal.

[0010] As the further specific optimization of the technical scheme of the present application: the differential GPS module 3 adopts two GPS antennas 32 plus high-precision positioning and directional receiving modules to realize the positioning and north calibration of the system. In order to realize the orientation, two GPS antennas 32 need to be connected with the differential GPS module 3 at the same time, and the two GPS antennas 32 need to be placed horizontally, and combined with the structure requirement, the distance between the two GPS antennas 32 is 0.44 m.

[0011] As the further specific optimization of the technical scheme of the present application: the signal processing module 4 comprises an AD module, a wideband DDS module, an FPGA programmable chip, a DSP processor module and an input / output interface module, wherein: the model of the AD module is EV10AQ190, the model of the wideband DDS module is AD9850, the model of the FPGA programmable chip is XC7K410TFFG900, the model of the DSP processor module is ADSP21489, and the model of the input / output interface module is a hundred megabit network integrated chip W5300; the AD module and the FPGA programmable chip constitute a functional module with signal parameter measurement function and azimuth measurement function.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] The present application has the functions of navigation radar signal receiving and full pulse sorting, self-measurement and fault diagnosis, parameter output and azimuth measurement. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure composition schematic diagram of the shipborne navigation radar reconnaissance warning system of the present application;

[0015] Figure 2 It is a principle composition schematic diagram of the shipborne navigation radar reconnaissance warning system of the present application;

[0016] Figure 3 It is a structure schematic diagram of the six-element horn antenna array 1 of the present application;

[0017] Figure 4 It is a structure schematic diagram of the differential GPS module 3 of the present application;

[0018] Figure 5 It is a placement structure schematic diagram of the GPS antenna 32 of the present application;

[0019] Figure 6 This is a schematic diagram of the principle structure of the radio frequency front-end module 2 of the present invention;

[0020] Figure 7 This is a schematic diagram of the structure of the radio frequency front-end module 2 of the present invention;

[0021] Figure 8 This is a schematic diagram of the baseband module hardware design structure of the present invention;

[0022] Figure 9 This is a schematic diagram of the shipborne navigation radar reconnaissance and warning system of the present invention. Detailed Implementation

[0023] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0024] Example 1

[0025] The shipborne navigation radar reconnaissance and warning system includes a horn antenna array 1, a radio frequency front-end module 2, a differential GPS module 3, a signal processing module 4, and a power supply module 5; wherein, the radio frequency front-end module 2 includes a radio frequency switch module 21 and an X-band down-conversion module 22; the differential GPS module 3 includes a GPS antenna 32 and a GPS receiver module 31.

[0026] This invention comprises a shipborne navigation radar reconnaissance and warning system using the aforementioned modules, enabling the detection and direction finding of radar signals in target areas. The shipborne navigation radar reconnaissance and warning system is connected to the main control computer via a network cable.

[0027] like Figure 3 As shown, the horn antenna array 1 consists of six constant-beam antennas, model XYT9395HA10. The pointing angle between the beam centers of any two adjacent antennas is 60°. The omnidirectional antenna covers a 360° range and is used for monitoring navigation radar signals in the 9.3GHz–9.5GHz frequency band, providing information for phase and amplitude correction and azimuth calculation in data processing. The six constant-beam antennas are evenly distributed around the circumference, with each antenna pointing in a specific direction. Figure One The parameters and indicators are consistent.

[0028] like Figure 7 As shown, the model of the RF switch module 21 is AS179-92LF, and the model of the X-band downconversion module 22 is ZZM68632. The RF switch module 21 realizes the switching of the antenna channel and the switching selection of the signal of the horn antenna array 1, and sends the selected signal to the X-band downconversion module 22. The X-band downconversion module 22 realizes the downconversion of the X-band signal to the intermediate frequency signal.

[0029] like Figure 4As shown in the figure, the differential GPS module 3 includes a GPS receiving module 31 and a GPS antenna 32; the model of the GPS receiving module 31 is GNSS positioning and orientation module UB482, and the model of the double GPS antenna 32 is HX-CH7603A; the GPS receiving module 31 and the GPS antenna 32 realize the positioning and north calibration of the system. In order to realize the orientation, two GPS antennas 32 need to be connected with the differential GPS module 3 at the same time, and the two GPS antennas 32 need to be placed horizontally, and according to the structure requirement, the distance between the two GPS antennas 32 is 0.44 m.

[0030] As shown in the figure, Figure 8 As shown in the figure, the signal processing module 4 includes an AD module, a wideband DDS module, a FPGA programmable chip, a DSP processor module, and an input / output interface module, wherein: the model of the AD module is EV10AQ190, the model of the wideband DDS module is AD9850, the model of the FPGA programmable chip is XC7K410TFFG900, the model of the DSP processor module is ADSP21489, and the model of the input / output interface module is a hundred megabit network integrated chip W5300; the AD module and the FPGA programmable chip constitute a functional module with signal parameter measurement function and azimuth measurement function.

[0031] Embodiment 2

[0032] The shipborne navigation radar reconnaissance warning system includes the following key sub-modules: the horn antenna array 1, the differential GPS module 3, the radio frequency front-end module 2 module, the signal processing module 4, and the power module 5. The overall structure of the shipborne navigation radar reconnaissance warning system is as shown in the figure, Figure 9 As shown in the figure, the outer size is Φ460mm*440.5mm. The shipborne navigation radar reconnaissance warning system is covered by the radome as shown in the figure, Figure 9 As shown in the figure, the radome increases the stability of the equipment and the characteristics of anti-fog, anti-salt, and waterproof.

[0033] The working principle of the shipborne navigation radar reconnaissance warning system is as follows:

[0034] The system principle composition of the shipborne navigation radar reconnaissance warning system is as shown in the figure, Figure 2The shown. In order to realize the parameter measurement and target orientation of the shipborne X-band navigation radar 9300MHz~9500MHz frequency range signal, the full range of signals need to be detected, and the signals in the required frequency band need to be received and down-converted to intermediate frequency, and then through special signal processing algorithm, the parameter information of the target signal is analyzed and identified; through the differential GPS antenna 32, the device position and the north direction are determined. The detection range of the shipborne navigation radar reconnaissance warning system is in the 9.3GHz~9.5GHz frequency band, because the wavelength of the high-end frequency is small, the phase ambiguity problem exists in the correlation interferometer phase method, and the amplitude comparison method is not sensitive to frequency change, so the amplitude comparison method is used to determine the signal direction. The amplitude comparison method is widely used in radio direction finding practical engineering due to its simple algorithm and stable performance, and the results are reported.

[0035] Function introduction of the shipborne navigation radar reconnaissance warning system.

[0036] Navigation radar signal receiving and full pulse sorting function:

[0037] The horn antenna array 1 of the shipborne navigation radar reconnaissance warning system collects the radiation source signals in the surrounding space, and measures the pulse width, carrier frequency, arrival time and other parameter information of the pulse signals through the digital channelization receiver. The wideband digital receiver transmits these pulse description words to the signal sorting. The signal sorter pre-sorts and main-sorts the continuous pulse sequence. After pre-sorting, the sparse pulse sequence is obtained, and then main-sorting is performed, and finally the target signal is sorted out.

[0038] Target azimuth measurement function:

[0039] The shipborne navigation radar reconnaissance warning system uses six independent antennas to generate six independent adjacent beams to cover 360° azimuth, and the antennas use the same directional diagram and are uniformly distributed. The device uses the amplitude comparison method. For the same radar signal, there is always a pair of adjacent beams that output the strongest and the second strongest signals, and by comparing the relative size of the envelope amplitudes of the signals output by the pair of adjacent beams, and combining the antenna positions, the radar azimuth can be determined.

[0040] The above detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

Claims

1. A shipborne navigation radar reconnaissance and warning system, characterized in that: It includes a horn antenna array (1), a radio frequency front-end module (2), a differential GPS module (3), a signal processing module (4), and a power supply module (5); wherein: the shipborne navigation radar reconnaissance and alarm system is connected to the main control computer via a network cable.

2. The shipborne navigation radar reconnaissance and warning system according to claim 1, characterized in that: The horn antenna array (1) consists of 6 constant beam antennas, with the beam centers of any two adjacent antennas pointing at an angle of 60°, and the omnidirectional antennas covering a 360° range; the model of the constant beam antenna is XYT9395HA10.

3. The shipborne navigation radar reconnaissance and warning system according to claim 1, characterized in that: The radio frequency front-end module (2) includes a radio frequency switch module (21) and an X-band downconversion module (22); the model of the radio frequency switch module (21) is AS179-92LF, and the model of the X-band downconversion module (22) is ZZM68632; the radio frequency switch module (21) realizes the switching of the antenna channel and the switching selection of the horn antenna array (1) signal, and sends the selected signal to the X-band downconversion module (22), and the X-band downconversion module (22) realizes the downconversion of the X-band signal to the intermediate frequency signal.

4. The shipborne navigation radar reconnaissance and warning system according to claim 1, characterized in that: The differential GPS module (3) includes a GPS receiver module (31) and a GPS antenna (32); the GPS receiver module (31) is a GNSS positioning and orientation module UB482, and the dual GPS antenna (32) is a model HX-CH7603A; the GPS receiver module (31) and the GPS antenna (32) realize the positioning and north-pointing calibration of this system.

5. The shipborne navigation radar reconnaissance and warning system according to claim 1, characterized in that: The signal processing module (4) includes an AD module, a wideband DDS module, an FPGA programmable chip, a DSP processor module, and an input / output interface module, wherein: the AD module is model EV10AQ190, the wideband DDS module is model AD9850, the FPGA programmable chip is model XC7K410TFFG900, the DSP processor module is model ADSP21489, and the input / output interface module is model W5300 100Mbps Ethernet integrated chip; the AD module and the FPGA programmable chip form a functional module with signal parameter measurement function and orientation measurement function.

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