Radar device for airport scene monitoring

Abstract

The invention provides a radar device for airport scene monitoring. The radar device comprises a radar array plane, a display control terminal and an AC-DC power conversion module. The AC-DC power supply conversion module is used for supplying power to a radar array plane; the display control terminal is used for issuing a control instruction to the radar array plane, receiving a target detection result of the radar array plane, and displaying and recording the target detection result; the radar array plane is used for receiving the control instruction, carrying out target detection according to the control instruction, and sending a target detection result to the display control terminal for displaying and recording. The system can be applied to small and medium-sized airports, economical scene monitoring is achieved, the control function of a station level command center can be powerfully supported, it is guaranteed that work of the control center is not affected by blind areas and weather changes, smooth and efficient traffic of airplanes and vehicles in a station level is guaranteed, the utilization rate of airports and taxiways is increased, and the operation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of airport scene monitoring, and in particular to a radar device used for airport scene monitoring. Background Art

[0002] In the past 20 years, the global aviation industry has developed rapidly. How to manage the increasing number of aircraft and the corresponding increase in ground service vehicles in limited space and changeable weather conditions to improve the utilization and reliability of airports has become a problem that all airports must consider. In this case, airport surface surveillance came into being.

[0003] The traditional airport surface surveillance radar is a powerful supplement to the primary and secondary radars, and is one of the important supporting facilities for achieving II / III precision approach and on-site command. The airport surface surveillance radar system is mainly used to monitor and track targets on the airport ground. After fully integrating and analyzing flight data, meteorological observations and other information, the real-time status of targets on the airport apron, taxiway and runway is provided to controllers and airport ground service personnel to monitor whether there is a deviation in the target movement, so as to avoid conflicts between moving objects in the relevant area and prevent intrusion. In addition, the surface surveillance radar can effectively ensure that the airport can operate normally even in low visibility conditions.

[0004] However, traditional airport surface surveillance radar has the following problems:

[0005] 1. Traditional airport surface surveillance radars are expensive. Some small and medium-sized airports cannot afford the high construction costs, so an economical surface surveillance solution is imperative.

[0006] 2. When traditional airport surface surveillance radar is installed at the airport, there will be certain blind spots. Low-cost radar equipment is needed to fill the blind spots and improve the shortcomings of traditional surface surveillance. Summary of the invention

[0007] The present invention aims to provide a radar device for airport surface monitoring to solve the problems existing in the above-mentioned traditional airport surface monitoring radar.

[0008] The present invention provides a radar device for airport scene monitoring, comprising a radar array, a display and control terminal and an AC-DC power conversion module;

[0009] The AC-DC power conversion module is used to supply power to the radar array;

[0010] The display and control terminal is used to send control instructions to the radar array, and receive target detection results from the radar array and display and record them;

[0011] The radar array is used to receive the control instructions and perform target detection according to the control instructions, and send the target detection results to the display and control terminal for display and recording.

[0012] In some embodiments, the radar array can be adjusted in azimuth and elevation.

[0013] In some embodiments, the radar array performs azimuth and elevation angle adjustments via a data rate mode.

[0014] In some embodiments, the radar array adopts a partial transmission and full array reception operation mode.

[0015] In some embodiments, the radar array includes an array antenna, a TR / R component, a receiving synthesis network, a down-conversion, a frequency synthesizer, a signal processing module, a servo turntable and a positioning and orientation module; the servo turntable has a slip ring;

[0016] One end of the signal processing module is connected to the display and control terminal via the servo turntable's convergence ring, and the other end is connected to the transceiver antenna via the down-conversion, receiving synthesis network, and TR / R component in sequence; the frequency synthesizer is connected to the signal processing module down-conversion and TR / R component.

[0017] In some embodiments, the array antenna is installed with a high-transmittance antenna cover.

[0018] In some embodiments, the TR / T assembly consists of an 8-channel TR assembly and a 4-channel R assembly;

[0019] Through modular design, the TR component has 2 modules, 1 module for every 4 channels; the R component has 1 module, 1 module for every 4 channels;

[0020] The R channel of the TR component and each channel of the R component contain phase shift and attenuation functions.

[0021] In some embodiments, the signal processing module is specifically used to:

[0022] Receive 2-channel intermediate frequency analog signals;

[0023] Perform AD sampling, DDC, pulse pressure and MTD on each intermediate frequency analog signal to obtain the range-Doppler result; perform distance measurement and azimuth angle measurement on the target crossing the threshold after the range-Doppler result is subjected to constant false alarm detection;

[0024] The output results of the two intermediate frequency analog signals are used for pitch amplitude ratio angle measurement to obtain the target point track information, which is sent to the display and control terminal through the servo turntable's merge ring for subsequent track processing.

[0025] In some embodiments, the display and control terminal includes a network transceiver module, a data processing module and a display interface; the display interface includes a P display interface, a BIT interface, a radar working interface and a radar control interface;

[0026] The network transceiver module is used to receive the target point information and BIT information of the radar array from the signal processing module, or send control instructions to the radar array;

[0027] The data processing module is used to perform track initiation, data association and tracking filtering on the target point track information to form the target track information;

[0028] The P display interface is used to display target track information;

[0029] The BIT interface is used to display the BIT information of the radar array;

[0030] The radar working interface is used to set the working mode and working parameters of the radar array;

[0031] The radar control interface is used to send the set working mode and working parameters to the radar array through the network transceiver module with control instructions.

[0032] In some embodiments, the display and control terminal has the function of recording and replaying target detection results.

[0033] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0034] 1. The present invention can be applied to small and medium-sized airports to realize economical scene monitoring, and can effectively support the control function of the apron command center, ensuring that the work of the control center is not affected by blind spots and weather changes, ensuring smooth and efficient traffic of aircraft and vehicles in the apron, improving the utilization rate of aircraft stands and taxiways, and reducing operating costs.

[0035] 2. The present invention can ensure that the controller can obtain the information of the aircraft and the vehicle on the display and control terminal at the control seat, can see the moving route direction of the aircraft and the vehicle, and distinguish them.

[0036] 3. The present invention has a certain ability to classify ground and air targets and realizes the detection function of low-altitude intruders.

[0037] 4. The operating frequency band of the radar device of the present invention can be in the Ku band. Compared with the band width, the Ku band radar has a good commercialization foundation for RF chips, low cost, and is economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the structure of a radar device for airport scene monitoring in an embodiment of the present invention.

[0039] Figure 2a Schematic diagram of the azimuth and elevation angle adjustment of the radar array in an embodiment of the present invention (horizontal state).

[0040] Figure 2b Schematic diagram of the azimuth and elevation angle adjustment of the radar array in an embodiment of the present invention (elevation angle state).

[0041] Figure 3 It is a schematic diagram of the pitch wide transmission and narrow reception wave position in an embodiment of the present invention.

[0042] Figure 4 1 is a block diagram of a radar device for airport scene monitoring in an embodiment of the present invention.

[0043] Figure 5 4 is a functional principle diagram of a radar device for airport scene monitoring in an embodiment of the present invention.

[0044] Figure 6 4 is a flow chart of target point trace processing of the signal processing module in an embodiment of the present invention.

[0045] Figure 7 1 is a functional principle diagram of the display and control terminal in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] like Figure 1 As shown, this embodiment provides a radar device for airport scene monitoring, including a radar array, a display and control terminal, and an AC-DC power conversion module;

[0049] The AC-DC power conversion module is used to power the radar array, for example, converting AC220 mains power into DC28V required by the radar array during operation;

[0050] The display and control terminal is used to send control instructions to the radar array, and receive target detection results of the radar array and display and record them; the control instructions include control instructions such as servo speed and working mode;

[0051] The radar array is used to receive the control instructions and perform target detection according to the control instructions, and send the target detection results to the display and control terminal for display and recording.

[0052] like Figure 2a , Figure 2b As shown, the radar array can be adjusted in azimuth and elevation.

[0053] In this embodiment, the radar array can detect targets in 360° in azimuth at a data rate of 1 Hz, and has the ability to detect and track ground targets and air targets. Azimuth adjustment is achieved using a servo turntable with a rotation speed of 60 r / m.

[0054] In this embodiment, the radar array can be adjusted in pitch angle. When a larger pitch angle range is required, it can be achieved by reducing the data rate or shortening the detection distance. The pitch angle range can be ±30°. The pitch angle adjustment is achieved by the pitch adjustment mechanism on the servo turntable.

[0055] In this embodiment, the azimuth adopts a mechanical scanning mode, and the elevation adopts an electronic scanning mode, that is, a one-dimensional mechanical scanning + one-dimensional electronic scanning mode.

[0056] Regarding the pitch angle adjustment, it should be noted that in order to fill the blind spots of traditional airport surveillance radars, the device of this embodiment has a 1Hz data rate mode for introducing real-time data into the control center system to fill the blind spots of traditional scene surveillance radars. The 1Hz data rate mode is mainly used for ground target or aerial target detection. The pitch angle coverage range is small, which is a beam width. The 1Hz data rate mode is the main working mode of the device. The azimuth speed of the servo turntable is 60r / min, and the data rate is 1Hz. In the high data rate mode, the staring mode is adopted to transmit a wide beam and receive two beams covering the transmitting beam at the same time. Transmit a wide beam and receive two receiving beams covering the transmitting beam. By overlapping the receiving beams to perform amplitude comparison angle measurement, the detection and tracking of ground targets and aerial targets can be realized. It can distinguish between ground targets and aerial targets and has a certain target classification capability. Figure 3 As shown, in this mode, if it is mainly used to detect aerial targets, the detection of aerial targets can be achieved by adjusting the pitch angle of the radar array.

[0057] In some embodiments, the servo turntable may be secured by a tripod or other mounting structure.

[0058] like Figure 4As shown, the radar array includes an array antenna, a TR / R component, a receiving synthesis network, a down-conversion, a frequency synthesizer, a signal processing module, a servo turntable and a positioning and orientation module; the servo turntable has a slip ring; one end of the signal processing module is connected to the display and control terminal via the slip ring of the servo turntable, and the other end is connected to the transceiver antenna via the down-conversion, the receiving synthesis network, and the TR / R component in sequence; the frequency synthesizer is connected to the signal processing module down-conversion and the TR / R component.

[0059] The array antenna consists of 12 antennas. The azimuth beam width is about 1.85° (center frequency, normal), and 360-degree azimuth coverage is achieved through mechanical scanning; the pitch is through 12 array antennas, with the ability to scan beams within the range of ±30°. At the same time, in order to ensure the antenna radiation transmittance, the array antenna is equipped with a high-transmittance antenna cover.

[0060] The radar array adopts a partial transmission and full array reception working mode. Therefore, the TR / T component consists of an 8-channel TR component and a 4-channel R component. Through modular design, the TR component has a total of 2 modules, with 1 module for every 4 channels. The R component has a total of 1 module, with 1 module for every 4 channels. The R channel of the TR component and each channel of the R component contain phase shift and attenuation functions to achieve pitch beam scanning and amplitude control functions.

[0061] The main function of the receiving synthesis network is to form two receiving beams by synthesizing 12 receiving echo signals through the network to realize the amplitude ratio angle measurement function.

[0062] The down-conversion receives the 2-channel Ku-band signals output by the synthesis network and converts them to intermediate frequency twice. The down-conversion local oscillator input signal is provided by the frequency synthesizer.

[0063] The frequency synthesizer has three functions: generating a fully coherent transmit signal and up-converting it to the Ku band; generating a reference clock for sampling and timing; and generating two local oscillator signals for down-conversion.

[0064] The positioning and orientation module can be used to realize positioning and orientation of Beidou antenna and inclinometer.

[0065] like Figure 5 As shown, the radar device for airport scene monitoring is divided into a power supply process, a control process and a data process. The display and control terminal issues a control command, which is transmitted to the signal processing module of the radar array through the gigabit network via the servo turntable merge ring. The signal processing module parses the control instruction, controls the operation of each module, generates the corresponding timing, and the radar array continuously detects targets at the set speed. During the operation of the radar, each module reports the working status regularly, and the signal processing template is summarized and reported to the display and control terminal to detect the working status in real time.

[0066] In some embodiments, the signal processing module uses one Xilinx K7 series XC7K325T-2FFG900I and one TI company's 8-core DSP chip TMS320C6678ACYPA as the main algorithm processing chip; one ADI company's AD9268 chip completes the acquisition of the input intermediate frequency signal, and the on-board data storage uses one NAND Flash, one QDDR (FPGA), two DDR3 (FPGA) and four DDR3 (DSP) for data storage; the stored data can be exported through the Ethernet port; the signal processing module completes the control function of other modules, including frequency synthesis, TR components, R components, down-conversion, positioning and orientation, and servo turntable, as well as processing of detection data.

[0067] In some embodiments, the signal processing module processes the detection data as follows: Figure 6 As shown in the figure, the signal processing module receives two intermediate frequency analog signals, performs AD sampling, DDC, and pulse compression on each intermediate frequency analog signal, performs MTD on the echo signal of 22 cycles according to a wave position dwell time, obtains the range-Doppler result, and performs distance measurement and azimuth angle measurement on the target that passes the threshold after the range-Doppler result is detected by constant false alarm (CFAR). After that, the output results of the two channels are measured by pitch ratio angle measurement to obtain the target point track information (range, azimuth, pitch), which is sent to the display and control terminal through the Gigabit network and the servo turntable's merge ring for subsequent track processing.

[0068] like Figure 7 As shown, the working principle of the display and control terminal includes: the network transceiver module receives the target point track information and the BIT information of the radar array from the signal processing module, and the target point track information is sent to the data processing module for track initiation, data association and tracking filtering, etc., to form the target track information and send it to the P display interface for display; the BIT information of the radar array is sent to the BIT interface for display; the user sets the working mode and working parameters of the radar array through the radar working interface, and the radar control interface sends the set working mode and working parameters to the signal processing module through the network transceiver module with control instructions, and distributes them to each module of the radar array to realize the control of the radar array. In some embodiments, the display and control terminal has the function of recording and replaying the target detection results. It should be noted that the P display is a display method that uses the radar array as the center of the circle and represents the distance and azimuth of the detected target in polar coordinates. The P display provides all the plane information detected by the radar array within a 360° range.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A radar device for airport scene monitoring, characterized in that: Including radar array, display and control terminal and AC-DC power conversion module; The AC-DC power conversion module is used to supply power to the radar array; The display and control terminal is used to send control instructions to the radar array, and receive target detection results from the radar array and display and record them; The radar array is used to receive the control instructions and perform target detection according to the control instructions, and send the target detection results to the display and control terminal for display and recording.

2. The radar device for airport surface monitoring according to claim 1, characterized in that: The radar array can be adjusted in azimuth and elevation.

3. The radar device for airport surface monitoring according to claim 2, characterized in that: The radar array performs azimuth and elevation angle adjustment through a data rate mode.

4. The radar device for airport surface monitoring according to claim 1, characterized in that: The radar array adopts a partial transmission and full array reception working mode.

5. The radar device for airport surface monitoring according to claim 1, characterized in that: The radar array includes an array antenna, a TR / R component, a receiving synthesis network, a down-conversion, a frequency synthesizer, a signal processing module, a servo turntable and a positioning and orientation module; the servo turntable has a slip ring; One end of the signal processing module is connected to the display and control terminal via the merge ring of the servo turntable, and the other end is connected to the transceiver antenna via the down-conversion, receiving synthesis network, and TR / R component in sequence; The frequency synthesizer is connected to the signal processing module down-conversion and TR / R components.

6. The radar device for airport surface monitoring according to claim 5, characterized in that: The array antenna is equipped with a high-transmittance antenna cover.

7. The radar device for airport surface monitoring according to claim 5, characterized in that: The TR / T component is composed of an 8-channel TR component and a 4-channel R component; Through modular design, the TR component has 2 modules, 1 module for every 4 channels; the R component has 1 module, 1 module for every 4 channels; The R channel of the TR component and each channel of the R component contain phase shift and attenuation functions.

8. The radar device for airport surface monitoring according to claim 5, characterized in that: The signal processing module is specifically used for: Receive 2-channel intermediate frequency analog signals; Perform AD sampling, DDC, pulse pressure and MTD on each intermediate frequency analog signal to obtain the range-Doppler result; The range-Doppler result is subjected to constant false alarm detection to measure the distance and azimuth angle of the target that crosses the threshold; The output results of the two intermediate frequency analog signals are used for pitch amplitude ratio angle measurement to obtain the target point track information, which is sent to the display and control terminal through the servo turntable's merge ring for subsequent track processing.

9. The radar device for airport surface monitoring according to claim 1, characterized in that: The display and control terminal includes a network transceiver module, a data processing module and a display interface; the display interface includes a P display interface, a BIT interface, a radar working interface and a radar control interface; The network transceiver module is used to receive the target point information and BIT information of the radar array from the signal processing module, or send control instructions to the radar array; The data processing module is used to perform track initiation, data association and tracking filtering on the target point track information to form the target track information; The P display interface is used to display target track information; The BIT interface is used to display the BIT information of the radar array; The radar working interface is used to set the working mode and working parameters of the radar array; The radar control interface is used to send the set working mode and working parameters to the radar array through the network transceiver module with control instructions.

10. The radar device for airport surface monitoring according to claim 9, characterized in that: The display and control terminal has the function of recording and replaying the target detection results.

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