CN205374737U - Meteorological detection system of hybrid mode based on multifunction array radar - Google Patents

Abstract

The utility model discloses a mixed-mode meteorological detection system based on a multifunctional phased array radar, which includes several radar nodes connected in sequence to form a radar network, and each radar node includes an array antenna connected in sequence and a transceiver assembly , an up-down converter and an intermediate frequency transceiver exciter, the output end of the intermediate frequency transceiver exciter is connected to the data ingestor, the radar data processor and the display module in turn, and the radar network input end is connected to the radar control and operation interface module through the network, through Meteorology that maximizes the allocation of radar resources to the localization and tracking of significant weather events based on localizing significant weather events, estimating where they will move next, and then passing this information to the scan scene for the next scan cycle application task.

Description

A Mixed Mode Meteorological Detection System Based on Multifunctional Phased Array Radar

technical field

The utility model relates to the field of radar monitoring, in particular to a mixed-mode meteorological detection system based on a multifunctional phased array radar.

Background technique

The main disadvantage of existing long-range weather radars is their lack of ability to detect weather hazards at low to moderate altitudes due to the curvature of the Earth. Since satellite weather remote sensing detection does not provide a real-time update of the progress of weather activities. Therefore, the progression and exact location of local weather activity at low to moderate altitudes may not be detectable.

The Multifunctional Phased Array Radar is available in three configurations: 2-D phase-scan, 1-D horizontal phase-scan and 1-D vertical phase-scan. In weather sensing systems, each radar node covers a near range to overcome the problem of the curvature of the earth. Through the data fusion of the meteorological data of each radar node, the coverage of a large area is obtained. The radar is designed to perform multiple tasks at the same time, and can be applied to ground target tracking, maritime surveillance, and weather detection, etc.; performing multiple tasks at the same time means that when radar resources are allocated for different tasks, higher radar scan time is required. Require. This is why effective radar scanning scenarios are very important for how to flexibly allocate limited radar transmission resources to different detection tasks and comply with the corresponding task observation time.

The complexity of the factors that affect the formation and movement of weather phenomena makes them difficult to detect and track. Therefore, to predict the direction of movement of weather phenomena in advance requires a very advanced scan and a new model applied every scan cycle. The scanning methods or scanning scenarios used by existing multifunctional phased array radars are mainly used for non-meteorological detection, and more resources will be allocated to non-meteorological detection application scenarios. Therefore, when using the existing multi-function phased array radar scanning method to detect and track rapidly changing weather activities such as tornadoes, wildfire smoke, etc., the time update rate will have serious problems. The major challenge is how to optimally allocate limited radar transmission resources to multiple application tasks while satisfying the scan time of each application task. For example, the scan time for an air traffic control application task cannot exceed 5 seconds per revolution. Therefore, if two air traffic control and meteorological remote sensing application missions are running simultaneously, most of the radar resources will be allocated to air traffic control procedures, which may lead to loss of tracking of important weather events.

Contents of the invention

In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides a mixed-mode weather detection system based on multifunctional phased array radar, which optimizes the resources of phased array weather radar when detecting and tracking weather activities .

In order to achieve the above object, the technical solution adopted by the utility model is:

A mixed-mode meteorological detection system based on multifunctional phased array radar is characterized in that: it includes several radar nodes connected in sequence to form a radar network, and each radar node includes an antenna connected in sequence, a transceiver component, The up-down converter and the intermediate frequency transceiver exciter, the output end of the intermediate frequency transceiver exciter is connected to the data ingestor, the radar data processor and the display module in turn, and the radar network input end is connected to the radar control and operation interface module through the network.

As an improvement of the above technical solution, the transceiver assembly includes a receiving unit, a power amplifier, a digital-to-analog circuit, a power control, a cooling system and a transmitting unit.

As an improvement of the above technical solution, the up-down converter includes an up-converter and a down-converter, the output terminals of the transceiver component are respectively connected to the up-converter and the down-converter, and the output terminal of the up-converter is connected to an intermediate frequency transceiver exciter, The input terminal of the down-converter is connected with the intermediate frequency transceiver exciter.

The beneficial effects of the utility model are: a mixed-mode meteorological detection system based on multifunctional phased array radar, by localizing important weather activities, estimating their next moving positions, and then passing these information to The scan scenario for the next scan cycle maximizes the allocation of radar resources to meteorological application tasks for localization and tracking of significant weather events.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

Fig. 1 is a system structure diagram of a specific embodiment of the utility model.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail:

With reference to accompanying drawing 1, the utility model proposes a kind of mixed mode weather detection system based on multifunctional phased array radar, a kind of mixed mode weather detection system based on multifunctional phased array radar, comprises several radar nodes, each radar The node includes an antenna 11, a transceiver assembly 12, an up-down converter 13 and an intermediate frequency transceiver exciter 14 connected in sequence, and is characterized in that: the output end of the intermediate frequency transceiver exciter 14 is sequentially connected to a data ingestor 15, a radar data processor 16 and The display module 2 and several radar nodes are connected in sequence to form a radar network 1, and the input end of the radar network 1 is connected to the radar control and operation interface module 3 through the network. The transceiver component 12 includes a receiving unit 121 , a power amplifier 122 , a digital-to-analog circuit 123 , a power control 124 , a cooling system 125 and a transmitting unit 126 . The up-down converter 13 includes an up-converter 131 and a down-converter 132, the output terminals of the transceiver assembly 12 are respectively connected to the up-converter 131 and the down-converter 132, and the output terminal of the up-converter 131 is connected to the intermediate frequency transceiver exciter 14 , the input terminal of the down-converter 132 is connected with the intermediate frequency transceiver exciter 14.

The output end of the intermediate frequency transceiver exciter 14 can also be connected with a data ingestor 15, and the output end of the data ingestor 15 is successively connected with a sea surface target processor, the ocean target display module (applicable to NMEA protocol); the radar network 1. Connect with a central processor of a sea area monitoring system and several user terminals sequentially through the Internet. The utility model is not shown.

The air traffic control radar installed on the coast contains an antenna that is mechanically rotated in a certain direction, and the scanning rate can be as high as 5 seconds. Altitude spaces, high beams are spaces used to cover medium to high altitudes. For air traffic control radars on coastlines, the low beam detects both ground and air targets. The antenna emits a series of electromagnetic pulses towards the monitored area of interest, and objects in the monitored area reflect the electromagnetic pulses back to the antenna. The radar signals reflected from some objects that need attention are called "targets", while the radar signals reflected from other objects are called "clutter", which is the noise in the radar system. Surface targets are considered noise in existing air control radar systems and are therefore removed during their signal processing. Usually, the radar data collected from the antenna 11 is preprocessed through a band-pass filter on the data link to remove irrelevant signals or noise outside the radar data, and then demodulate the radar data to intermediate frequency radar data, and then perform radar data processing Analog-to-digital conversion. At this point, the radar data is demodulated to baseband data (IQ data), and the baseband data (IQ data) is low-pass filtered and sampled. This data is sent to the air target processor 15 for further processing for detection and tracking of air targets.

A mixed-mode meteorological detection system based on multifunctional phased array radar mainly includes the following steps:

1) Identify and list major meteorological events: the radar user or operator selects meteorological events through the radar control and operation interface module, and the radar control and operation interface module automatically loads the characteristic parameters corresponding to the meteorological event and a predetermined model of its movement status. In this step, significant meteorological events are selected by the user or operator of the radar. These significant weather events include hurricanes, tornadoes, flocks of birds approaching the airport area, and smoke from forests. For each important weather event, the system automatically loads a predetermined model of its characteristics and its movement conditions.

2) The radar network locates the selected major meteorological event; according to the characteristics of the selected major weather event, each radar network will conduct a full-coverage scan to determine whether it exists; once identified, the azimuth, distance and altitude will be recorded.

3) The radar network predicts the future moving position of the major meteorological event selected in step 2); use the predefined model and estimate the future moving position of the selected important meteorological event according to the corresponding set environmental parameters such as wind speed and wind direction.

4) The radar network updates the scanning scene; in this link, the pre-estimated position of major meteorological events will be integrated into the dwell position or time of the radar scanning scene, and the possibility of pointing the radar beam at the designated dwell position Areas where major meteorological conditions occur. Areas where significant meteorological conditions are likely to occur are usually larger than estimated from models. The reason is that integration increases the variance of the estimate. In this way, in the entire coverage area of the radar, only a small limited area is scanned by the radar, so the time of each scan will be shortened. Radar resources can thus be used for other application tasks, leading to a truly working multifunctional phased array.

5) Run a new scan scenario for the next scan cycle, collect data and send it to the radar data processor; the echo signal received through the antenna from the dwell position corresponding to the significant weather event is passed through the RF receiver, down-converter and IF Receiver/Exciter (REX) modules. The output of REX is called the baseband signal of IQ data. The data from IQ is sent to the weather radar data processor through the network interface, which can be used to detect and locate important weather events. The data includes corresponding pulse header information related to major meteorological events, pulse repetition frequency, and beam data in the direction of the due north antenna. Before the data ingestor receives this information, it checks its validity and decodes it into a data format readable by the Radar Data Processor (RDP). The responsibility of the data ingestor is to identify and correct missing or incorrect data due to overloaded network communication or other reasons, and prevent the sending of these incorrect data to RDP.

6) The radar digital processor processes the data and detects and locates significant meteorological events and generates secondary and tertiary meteorological products; this data stream is then processed by the radar data processor (RDP) to generate secondary and tertiary meteorological products, including Reflectivity, differential reflectivity, correlation coefficient, spectral width, radial velocity, and differential phase shift. C uses the Gaussian model adaptive processing to filter and eliminate the clutter content in the data. With Class II and Class III products, significant meteorological events can be accurately located. For target groups of birds and other creatures, RDP is equipped with target trackers to detect and track them.

7) The display module is used to receive secondary and tertiary meteorological products and their status updated through step 4) and the location of important weather activities, and display them on the map; the weather activity display is used to receive secondary and tertiary products and The updated status and location of important weather events are displayed on the map. The display provides the operator with real-time weather hazard updates.

8) Return to step 3).

The above is a specific description of the preferred implementation of the utility model, but the utility model creation is not limited to the described embodiments, and those skilled in the art can also make various equivalent modifications or modifications without violating the spirit of the utility model. Replacement, these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (3)

1. A mixed-mode meteorological detection system based on multifunctional phased array radar, characterized in that: it includes several radar nodes connected in sequence to form a radar network (1), and each radar node includes Antenna (11), transceiver component (12), up-down converter (13) and intermediate frequency transceiver exciter (14), the output end of the intermediate frequency transceiver exciter (14) is sequentially connected to data ingestor (15), radar data processor (16) and a display module (2), the input end of the radar network (1) is connected to the radar control and operation interface module (3) through the network. 2. A mixed-mode meteorological detection system based on multifunctional phased array radar according to claim 1, characterized in that: the transceiver component (12) includes a receiving unit (121), a power amplifier (122), a digital-analog A circuit (123), a power control (124), a cooling system (125) and a transmitting unit (126). 3. According to claim 1, a mixed-mode meteorological detection system based on multifunctional phased array radar, the up-down converter (13) includes an up-converter (131) and a down-converter (132), and the transceiver The output terminals of the component (12) are respectively connected to the up-converter (131) and the down-converter (132), the output terminal of the up-converter (131) is connected to the intermediate frequency transceiver exciter (14), and the down-converter (132) The input end is connected with the intermediate frequency transceiver exciter (14).