CN109660303B - Short wave antenna performance evaluation system - Google Patents
Short wave antenna performance evaluation system Download PDFInfo
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- CN109660303B CN109660303B CN201811446416.0A CN201811446416A CN109660303B CN 109660303 B CN109660303 B CN 109660303B CN 201811446416 A CN201811446416 A CN 201811446416A CN 109660303 B CN109660303 B CN 109660303B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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Abstract
The invention discloses a short wave antenna performance evaluation system, and belongs to the technical field of communication. The system comprises: the system comprises an unmanned aerial vehicle, aerial test equipment, radio frequency transceiving equipment and central control equipment; the aerial test equipment is carried on the unmanned aerial vehicle, the radio frequency transceiver equipment is connected with the short wave antenna to be tested, and the radio frequency transceiver equipment is used for receiving an instruction of the central control equipment and controlling the short wave antenna to be tested to transmit a signal according to the instruction; detecting the power value of the short wave antenna to be detected, and transmitting the detected power value of the short wave antenna to be detected to the central control equipment; the central control equipment is used for controlling the operation of the unmanned aerial vehicle; sending the instruction to the radio frequency transceiving equipment; receiving the power value of the short wave antenna to be detected, which is sent by the radio frequency transceiving equipment; receiving a power amplifier output level value sent by the aerial test equipment; and evaluating the radiation performance of the short wave antenna to be detected according to the power value of the short wave antenna to be detected and the power amplifier output level value.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a short wave antenna performance evaluation system.
Background
The short-wave antenna is used as a throat key of a short-wave wireless communication system and plays an important role in the overall performance of the short-wave wireless communication system. The indexes for characterizing the performance of the short-wave antenna can be roughly divided into two types: the antenna feed performance such as voltage standing wave ratio, power capacity, grounding resistance and the like is mainly represented, and the indexes can be accurately tested through equipment such as a network analyzer and the like; the other type mainly characterizes the antenna radiation performance, such as gain, out-of-roundness of a directional diagram, beam pointing direction, beam width and the like, and characterizes the capability of the antenna to transmit or receive electromagnetic waves in all directions in space.
The antenna radiation performance index is a key index for measuring the antenna radiation performance, and the commonly used short wave antenna radiation performance index test method comprises the following steps: the performance of the antenna in the typical direction is tested by a test instrument at some positions on the ground, and the mode can only sample and test the spatial performance of the antenna and cannot comprehensively test the performance of the antenna.
Disclosure of Invention
The embodiment of the invention provides a short wave antenna performance evaluation system, which is used for realizing the radiation performance index test of a short wave antenna. The technical scheme is as follows:
the embodiment of the invention provides a short wave antenna performance evaluation system, which comprises:
the system comprises an unmanned aerial vehicle, aerial test equipment, radio frequency transceiving equipment and central control equipment;
the aerial test equipment is carried on the unmanned aerial vehicle;
the radio frequency transceiver is connected with the short wave antenna to be detected, and is used for receiving an instruction of the central control equipment and controlling the short wave antenna to be detected to transmit a signal according to the instruction; detecting the power value of the short wave antenna to be detected, and transmitting the detected power value of the short wave antenna to be detected to the central control equipment;
the central control equipment is used for controlling the operation of the unmanned aerial vehicle; sending the instruction to the radio frequency transceiving equipment; receiving the power value of the short wave antenna to be detected, which is sent by the radio frequency transceiving equipment; receiving a power amplifier output level value sent by the aerial test equipment; and evaluating the radiation performance of the short wave antenna to be detected according to the power value of the short wave antenna to be detected and the power amplifier output level value.
In an implementation manner of the embodiment of the present invention, the aerial test device includes:
the device comprises a short wave antenna, a first power amplifier module, a first signal source, a first data exchange and control module, a first data transmission radio, a flight control module and a first power supply module; the first power amplifier module is simultaneously electrically connected with the short wave antenna and the first signal source, the first data exchange and control module is simultaneously electrically connected with the first signal source, the first data transmission radio and the flight control module, and the first power amplifier module, the first signal source, the first data exchange and control module and the first data transmission radio are all electrically connected with the first power supply module;
the short wave antenna is used for communicating with the short wave antenna to be detected;
the flight control module is used for acquiring the state information of the unmanned aerial vehicle, receiving a flight control instruction sent by the central control equipment, and controlling the unmanned aerial vehicle to operate according to the state information of the unmanned aerial vehicle and the flight control instruction;
the first data exchange and control module is used for acquiring state information of the unmanned aerial vehicle and a power amplifier output level value of the first power amplifier module, and transmitting the state information and the power amplifier output level value to the central control equipment through the first data transmission station.
In an implementation manner of the embodiment of the present invention, the aerial test device further includes:
the system comprises a 900MHz data transmission antenna and a satellite antenna, wherein the 900MHz data transmission antenna and the satellite antenna are electrically connected with the flight control module.
In an implementation manner of the embodiment of the present invention, the radio frequency transceiver device includes:
the second power amplifier module, the second signal source, the power detection module, the second data exchange and control module, the second data transmission station and the second power supply module; the second power amplifier module is simultaneously electrically connected with the short wave antenna to be detected and the second signal source, the second data exchange and control module is simultaneously electrically connected with the second signal source, the second data transmission station and the power detection module, and the second power amplifier module, the second signal source, the second data exchange and control module, the power detection module and the second data transmission station are electrically connected with the second power module;
the power detection module is used for detecting the power value of the short wave antenna to be detected;
the second data exchange and control module is used for receiving an instruction of the central control equipment and controlling the short wave antenna to be tested to transmit signals according to the instruction; and when receiving the state information of the unmanned aerial vehicle sent by the central control equipment, transmitting the power value of the short wave antenna to be detected to the central control equipment through the second digital radio station.
In an implementation manner of the embodiment of the present invention, the central control device includes:
the third data transmission radio station, the third data exchange and control module, the upper computer, the flight control module data transmission radio station and the third power supply module; the third data exchange and control module is electrically connected with the third data transmission radio station and the upper computer at the same time, the upper computer is electrically connected with the flight control module data transmission radio station, and the third data transmission radio station, the third data exchange and control module, the upper computer and the flight control module data transmission radio station are electrically connected with the third power supply module;
the third data exchange and control module is used for sending a flight control instruction to the aerial test equipment through the flight control module data transmission radio station; receiving a power amplifier output level value sent by the air test equipment through the third data transmission station; sending an instruction to the radio frequency transceiving equipment through the third data transmission station, and receiving the power value of the short wave antenna to be detected, which is sent by the radio frequency transceiving equipment;
and the upper computer is used for evaluating the radiation performance of the short wave antenna to be detected according to the power value of the short wave antenna to be detected and the power amplifier output level value received by the third data exchange and control module.
In an implementation manner of the embodiment of the present invention, the third data exchanging and controlling module is further configured to store a power amplifier output level value sent by the air test device and a power value of the short wave antenna to be tested sent by the radio frequency transceiver device.
In an implementation manner of the embodiment of the present invention, the third data exchanging and controlling module is further configured to send a level query instruction to the air test device when the power amplifier output level value sent by the air test device is not received within a predetermined time interval.
In an implementation manner of the embodiment of the present invention, the upper computer is configured to correct and fit the power value of the short-wave antenna to be detected and the power amplifier output level value, and evaluate the out-of-roundness, the main lobe direction, the main lobe width, and the front-to-back ratio of the short-wave antenna to be detected.
In an implementation manner of the embodiment of the present invention, the central control device further includes a differential positioning station, and the differential positioning station is electrically connected to the upper computer.
In an implementation manner of the embodiment of the present invention, the radio frequency transceiver device is further connected to a standard short wave antenna, and the radio frequency transceiver device is further configured to detect a power value of the standard short wave antenna and transmit the detected power value of the standard short wave antenna to the central control device;
the central control equipment is further used for evaluating the gain performance of the short wave antenna to be detected according to the power value of the short wave antenna to be detected and the power value of the standard short wave antenna.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the aerial test equipment is carried on the unmanned aerial vehicle to communicate with the ground short wave antenna to be tested, and the central control equipment controls the operation of the unmanned aerial vehicle, so that the aerial vehicle communicates with the ground short wave antenna to be tested at a specific position, the power value of the short wave antenna to be tested is detected through the radio frequency transceiver equipment, the power amplifier output level value is obtained through the aerial test equipment, the central control equipment evaluates the radiation performance of the short wave antenna to be tested according to the power value and the power amplifier output level value of the short wave antenna to be tested, the omnibearing test of the short wave antenna performance is ensured, and the aerial test equipment is carried by adopting the unmanned aerial vehicle, so that the test cost is lower.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a short-wave antenna performance evaluation system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an aerial test device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a radio frequency transceiver device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a central control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a short-wave antenna 201 performance evaluation system according to an embodiment of the present invention. Referring to fig. 1, the system includes: the unmanned aerial vehicle 100, the aerial test device 200, the radio frequency transceiver device 300 and the central control device 400.
The aerial test device 200 is mounted on the drone 100. The radio frequency transceiver 300 is connected with the short wave antenna 500 to be tested, and the radio frequency transceiver 300 is used for receiving an instruction of the central control device 400 and controlling the short wave antenna 500 to be tested to transmit a signal according to the instruction; and detecting the power value of the short wave antenna 500 to be detected, and transmitting the detected power value of the short wave antenna 500 to be detected to the central control equipment 400. The central control apparatus 400 is used to control the operation of the drone 100; sending an instruction to the radio frequency transceiver device 300; receiving a power value of the short wave antenna 500 to be detected sent by the radio frequency transceiving equipment 300; receiving a power amplifier output level value sent by the air test equipment 200; and evaluating the radiation performance of the short wave antenna 500 to be tested according to the power value and the power amplifier output level value of the short wave antenna 500 to be tested.
According to the embodiment of the invention, the aerial test equipment is carried on the unmanned aerial vehicle to communicate with the ground short wave antenna to be tested, and the central control equipment controls the operation of the unmanned aerial vehicle, so that the aerial vehicle communicates with the ground short wave antenna to be tested at a specific position, the power value of the short wave antenna to be tested is detected through the radio frequency transceiver equipment, the power amplifier output level value is obtained through the aerial test equipment, the central control equipment evaluates the radiation performance of the short wave antenna to be tested according to the power value and the power amplifier output level value of the short wave antenna to be tested, the omnibearing test of the short wave antenna performance is ensured, and the aerial test equipment is carried by adopting the unmanned aerial vehicle, so that the test cost is lower.
Fig. 2 is a schematic structural diagram of an aerial test apparatus 200 according to an embodiment of the present invention. Referring to fig. 2, the aerial test apparatus 200 includes:
the system comprises a short wave antenna 201, a first power amplifier module 202, a first signal source 203, a first data exchange and control module 204, a first data transmission station 205, a flight control module 206 and a first power supply module 207; the first power amplifier module 202 is electrically connected to the short-wave antenna 201 and the first signal source 203, the first data exchange and control module 204 is electrically connected to the first signal source 203, the first data transmission station 205 and the flight control module 206, and the first power amplifier module 202, the first signal source 203, the first data exchange and control module 204 and the first data transmission station 205 are electrically connected to the first power module 207.
And the short wave antenna 201 is used for communicating with the short wave antenna 500 to be tested. And the flight control module 206 is configured to acquire the state information of the unmanned aerial vehicle 100, receive a flight control instruction sent by the central control device 400, and control the operation of the unmanned aerial vehicle 100 according to the state information and the flight control instruction of the unmanned aerial vehicle 100. The first data exchange and control module 204 is configured to obtain the state information of the drone 100 and the power amplifier output level value of the first power amplifier module 202, and transmit the state information and the power amplifier output level value to the central control device 400 through the first data transmission station 205.
Wherein, aerial test equipment 200 is small-size transmission and reception equipment to in install on unmanned aerial vehicle. The short wave antenna 201 adopts a miniaturized short wave loop antenna or a whip antenna, and is convenient to carry.
Wherein the flight control instructions may be set by the crew operating the central control apparatus 400. The flight control instruction is used for setting a flight path of the unmanned aerial vehicle, so that the unmanned aerial vehicle flies around a certain equal altitude surface of the short wave antenna to be detected according to a preset track.
In the embodiment of the present invention, the short wave antenna 201 communicates with the short wave antenna 500 to be tested, and at the same time, the flight control module 206 controls the command to control the operation of the unmanned aerial vehicle 100, and the power amplifier output level value of the first power amplifier module 202 can be periodically sampled at different positions of the flight trajectory and then returned to the central control device 400, so that the central control device 400 can complete the radiation performance of the short wave antenna 500 to be tested.
Further, in the flight process, the aerial test device 200 completes uniform time interval sampling of the power amplifier output level value, and the flight control module 206 returns the state information of the unmanned aerial vehicle according to the same interval period.
The first data exchange control module 204 may send the state information of the unmanned aerial vehicle 100 to the central control device 400, and then the central control device 400 may send a level query instruction, at this time, the first data exchange and control module 204 obtains the power amplifier output level value of the first power amplifier module 202 and transmits the power amplifier output level value to the central control device 400.
Wherein, the state information may include position information and attitude information of the drone. The location information may include altitude, latitude and longitude information. The attitude information of the drone may be implemented by sensors (e.g., gyroscopes, etc.), which may be part of the aerial test apparatus 200.
Wherein, first power module 207 can be the battery, makes things convenient for unmanned aerial vehicle to carry.
Further, the aerial test apparatus 200 further includes: 900MHz data transmission antenna 208 and satellite antenna 209, 900MHz data transmission antenna 208 and satellite antenna 209 all are connected with flight control module 206 electrically.
The satellite antenna 209 is used for communicating with a satellite, for example, a Beidou satellite, so as to position the unmanned aerial vehicle and obtain the position information of the unmanned aerial vehicle 100. The 900MHz data transmission antenna 208 is configured to communicate with the central control device 400, acquire a flight control instruction sent by the central control device 400, and the flight control module 206 controls the unmanned aerial vehicle 100 to fly by using the flight control instruction.
Further, the first data transceiver 205 is connected to an antenna 250, and the antenna 250 may be a 230MHz data transceiver.
Further, the aerial test device 200 further includes a device box, the first power amplifier module 202, the first signal source 203, the first data exchange and control module 204, and the first data transmission station 205 are disposed in the device box, and the other modules are disposed outside the device box.
Fig. 3 is a schematic structural diagram of an rf transceiver 300 according to an embodiment of the present invention. Referring to fig. 3, the radio frequency transceiver device 300 includes:
a second power amplifier module 301, a second signal source 302, a power detection module 303, a second data exchange and control module 304, a second radio station 305 and a second power supply module 306; the second power amplifier module 301 is electrically connected to the short wave antenna 500 to be detected and the second signal source 302 at the same time, the second data exchange and control module 304 is electrically connected to the second signal source 302, the second data transmission station 305 and the power detection module 303 at the same time, and the second power amplifier module 301, the second signal source 302, the second data exchange and control module 304, the power detection module 303 and the second data transmission station 305 are electrically connected to the second power module 306.
And the power detection module 303 is configured to detect a power value of the short-wave antenna 500 to be detected. The second data exchange and control module 304 is configured to receive an instruction of the central control device 400, and control the short-wave antenna 500 to be detected to transmit a signal according to the instruction; when receiving the state information of the unmanned aerial vehicle 100 sent by the central control device 400, the power value of the short wave antenna 500 to be tested is transmitted to the central control device 400 through the second data transmission station 305.
In the embodiment of the present invention, the second data exchanging and controlling module 304 controls the transceiving of the short wave antenna 500 to be detected through the second power amplifier module 301 and the second signal source 302, and in this process, the power value of the short wave antenna 500 to be detected is detected through the power detecting module 303 and transmitted to the central control device 400.
Specifically, the central control device 400 sends a power query instruction when receiving the status information of the unmanned aerial vehicle 100, and the second data exchange and control module 304 controls the power detection module 303 to detect the power value of the short-wave antenna 500 to be detected when receiving the power query instruction, and packages the power value of the short-wave antenna 500 to be detected and the status information of the unmanned aerial vehicle 100 to be sent to the central control device 400. The power inquiry command and the power value transmission of the short wave antenna 500 to be tested both pass through the second data transmission station 305.
In the embodiment of the invention, the first signal source and the second signal source are both responsible for generating the short-wave excitation signal, and the first power amplification module and the second power amplification module are both responsible for amplifying the short-wave excitation signal.
In an embodiment of the present invention, the second power module 306 may provide 12v dc power.
Further, the radio frequency transceiver 300 further includes an equipment box, the second power amplifier module 301, the second signal source 302, the power detection module 303, the second data exchange and control module 304, the second radio transceiver 305, and the second power module 306 are disposed in the equipment box, and the short wave antenna to be tested and the antenna connected to the second radio transceiver are disposed outside the equipment box.
Fig. 4 is a schematic structural diagram of a central control apparatus 400 according to an embodiment of the present invention. Referring to fig. 4, the central control apparatus 400 includes:
a third data transmission station 401, a third data exchange and control module 402, an upper computer 403, a flight control module data transmission station 404 and a third power module 405; the third data exchange and control module 402 is simultaneously electrically connected to the third data transfer station 401 and the upper computer 403, the upper computer 403 is electrically connected to the flight control module data transfer station 404, and the third data transfer station 401, the third data exchange and control module 402, the upper computer 403 and the flight control module data transfer station 404 are electrically connected to the third power module 405.
A third data exchange and control module 402, configured to send a flight control instruction to the aerial test device 200 through the flight control module data transfer station 404; receiving a power amplifier output level value sent by the air test equipment 200 through a third data transmission station 401; and sending an instruction to the radio frequency transceiver 300 through the third data radio 401, and receiving the power value of the short wave antenna 500 to be tested, which is sent by the radio frequency transceiver 300. And the upper computer 403 is configured to evaluate the radiation performance of the short-wave antenna 500 to be detected according to the power value and the power amplifier output level value of the short-wave antenna 500 to be detected, which are received by the third data exchange and control module 402.
In the embodiment of the present invention, on one hand, the third data exchange and control module 402 communicates with the aerial test device 200 through the flight control module data transfer station 404 to control the unmanned aerial vehicle 100; on the other hand, the third data transmission station 401 communicates with the radio frequency transceiving equipment 300 and the air test equipment 200 at the same time to obtain the power amplifier output level value and the power value of the short wave antenna 500 to be tested. The upper computer 403 completes the evaluation of the radiation performance of the short wave antenna 500 to be detected through the power amplifier output level value and the power value of the short wave antenna 500 to be detected, which are obtained by the third data exchange and control module 402.
The upper computer 403 is internally provided with flight control software and equipment control interface software, wherein the flight control software independently generates a flight real-time monitoring and control interface, a Google map is embedded in the flight control software, the map display and the three-dimensional display are supported, a track point selection mode and a manual input mode are supported, a flight control instruction is generated by setting the flight height and the flight radius, and the unmanned aerial vehicle can be ensured to fly according to a preset track. The upper computer 403 supports real-time state display, and the upper right corner of the interface can display information such as the posture, height, longitude and latitude, number of turns, speed and the like of the unmanned aerial vehicle in real time, can display the current track above a map, and supports path playback. The equipment control interface is generated by QT, the whole flow control of the test equipment is mainly realized, the equipment control interface mainly comprises test item setting, air test and ground test options, data uploading options, performance evaluation options and the like, and a QT program of the equipment control interface can automatically call a Matlab dynamic link library and call a certain type of short wave antenna directional diagram generated by a FEKO simulation tool for comparison and analysis.
The third data exchange and control module 402 is connected with the upper computer 403 by a 422 serial port, and the 422 serial port is used for receiving a control instruction of the upper computer and sending the power amplifier output level value and the power value of the short wave antenna 500 to be detected to the upper computer 403 for post-processing. The flight control module digital transmission station 404 and the upper computer 403 are connected by a Universal Serial Bus (USB).
In this embodiment of the present invention, the third data exchanging and controlling module 402 may be further configured to store the power amplifier output level value sent by the air test device 200 and the power value of the short wave antenna 500 to be tested sent by the radio frequency transceiving device 300.
During the storage, can be with unmanned aerial vehicle's state information and power amplifier output level value packing storage in a register, with unmanned aerial vehicle's state information and the power value packing storage of the short wave antenna 500 that awaits measuring in another register, can associate power amplifier output level value and the power value of the short wave antenna 500 that awaits measuring through unmanned aerial vehicle's state information.
In this embodiment of the present invention, the third data exchanging and controlling module 402 is further configured to send a level query instruction to the air test device 200 when the power amplifier output level value sent by the air test device 200 is not received in a predetermined time interval.
In this embodiment of the present invention, since the air test device 200 may periodically send the power amplifier output level value to the third data exchanging and controlling module 402, when the power amplifier output level value sent by the air test device 200 is not received within a predetermined time interval, the third data exchanging and controlling module 402 needs to send a level query instruction to the air test device 200 to obtain the power amplifier output level value. The cycle time may be set as required, for example, 0.1 second.
In the embodiment of the present invention, the upper computer 403 is configured to correct and fit the power value and the power amplifier output level value of the short-wave antenna 500 to be measured, and evaluate the out-of-roundness, the main lobe direction, the main lobe width, and the front-to-back ratio of the short-wave antenna 500 to be measured.
It should be noted that, because the WGS-84 geodetic coordinate system is adopted for GPS or beidou satellite positioning, when the short wave antenna performance test output processing is performed by using the unmanned aerial vehicle, the beidou coordinate value of the unmanned aerial vehicle must be converted into a corresponding coordinate value in a spherical coordinate system with the short wave antenna as the center. Firstly, the spherical coordinates of the large earth are converted into the rectangular coordinates of the earth, and then the rectangular coordinates of the earth are converted into a geographic coordinate system.
After the aerial test device 200 and the radio frequency transceiver 300 are used to complete sampling and collecting of test data (the power value and the power amplifier output level value of the short wave antenna 500 to be tested), the test data needs to be processed to obtain the performance index of the antenna array. The data processing includes two parts: firstly, correcting test data, which mainly comprises correcting external interference signals in a test process, correcting position errors caused by flight positioning and flight attitude by combining the radiation characteristic simulation of the airborne short-wave antenna 201, correcting radiation power changes of the airborne short-wave antenna 201 (namely, changes of power values of the short-wave antenna 500 to be detected by the radio frequency transceiver device 300), and the like; and secondly, performing interpolation fitting on the corrected test data, specifically adopting a variable-scale fractal interpolation algorithm, comprehensively considering local details and overall characteristics of a directional diagram function of the short-wave antenna 500 to be tested, selecting a proper vertical scale factor, performing forward and backward expansion by taking a point to be interpolated as a center, fully utilizing the self-similarity of the overall and local functions to be interpolated under the variable scale to obtain a directional diagram of the short-wave antenna 500 to be tested, and obtaining parameters such as out-of-roundness, main lobe direction, main lobe width, front-to-back ratio and the like according to the directional diagram.
The correcting of the position error caused by flight positioning and flight attitude by combining the radiation characteristic simulation of the airborne short wave antenna 201 comprises the following steps: position error correction and attitude compensation.
The position error correction may include implementing the calculation of the measured receive antenna error factor in conjunction with a position compensation operator. Since the position of each sampling point (the position of the drone) should be a constant distance from the central point (the positions of the central control device 400 and the radio frequency transceiver device 300) in an ideal state, when there is a deviation in the position information of the drone, the test data is compensated according to the deviation. Attitude compensation may include building a radiation characteristic simulation of the short wave antenna 201 on the drone platform by a simulation tool, and implementing calculation of the error of the short wave antenna 500 to be measured in conjunction with the radiation characteristic simulation. Because the short-wave antenna 201 on the drone should be an isotropic ideal point source in an ideal situation, when the drone is flying, there is a change in attitude (heading angle, roll angle, pitch angle), which will cause a deviation in the pitch and azimuth receiving powers corresponding to the position of the short-wave antenna 500 to be measured in a carrier coordinate system with the drone as the center, and therefore, it is necessary to compensate the test data according to the radiation characteristic simulation result of the airborne short-wave antenna 201.
In the embodiment of the present invention, the central control apparatus 400 may further include a differential positioning station 406, and the differential positioning station 406 is electrically connected to the upper computer 403. The differential positioning station 406 is connected with the upper computer 403 through a universal USB. The differential positioning station is used for providing time for the central control device 400 in a unified manner, and no additional GPS module is provided, so that time synchronization and time unification can be ensured.
Further, the central control device 400 may further include a switching power supply 407, an input terminal of the switching power supply 407 is electrically connected to the third power supply module 405, and two output terminals of the switching power supply 407 are electrically connected to the third data transmission station 401 and the third data exchange and control module 402, respectively.
In the embodiment of the present invention, the radio frequency transceiver 300 is further connected to the standard short wave antenna 201, and the radio frequency transceiver 300 is further configured to detect a power value of the standard short wave antenna 201, and transmit the detected power value of the standard short wave antenna 201 to the central control device 400.
The central control device 400 is further configured to evaluate the gain performance of the short-wave antenna 500 to be tested according to the power value of the short-wave antenna 500 to be tested and the power value of the standard short-wave antenna 201.
Since the gain performance of the short-wave antenna 500 to be tested needs to be compared with the standard short-wave antenna 201, when the gain performance is tested, the two stages are needed, one stage tests the data of the short-wave antenna 500 to be tested, the other stage tests the data of the standard short-wave antenna 201, and the gain performance of the short-wave antenna 500 to be tested is determined according to the test data of the two stages. It should be noted that, in the two phases, the flight trajectory of the drone is set to be the same.
The standard short wave antenna 201 comprises a vertical polarization antenna quasi-standard antenna and a horizontal polarization antenna quasi-standard antenna, wherein the horizontal polarization antenna quasi-standard antenna adopts a half-wavelength dipole antenna with adjustable length and adjustable erection height. The gain performance of the short wave antenna 500 to be tested is obtained by testing the electromagnetic wave energy distribution condition of the quasi-standard antenna and comparing the electromagnetic wave energy distribution condition with the electromagnetic wave energy distribution condition of the short wave antenna 500 to be tested.
Further, the central control device 400 further includes a device box, the third data transmission station 401, the third data exchange and control module 402 and the switching power supply 407 are disposed in the device box, and the other modules are disposed outside the device box.
In the embodiment of the present invention, the first, second, and third data exchanging and controlling modules may include a data exchanging and controlling board and a memory card.
Further, when the test starts, the worker sets the working state of the central control device 400 to be the aerial test evaluation mode through the upper computer, and the central control device 400 performs self-checking and uploads self-checking information. The staff utilizes the host computer to set up aerial unmanned aerial vehicle's flight orbit parameter. Setting the unmanned aerial vehicle aerial test equipment 200 to be in a sending state, and setting the radio frequency transceiver 300 to be in a receiving state, and controlling the unmanned aerial vehicle to take off. And then, completing the performance test of the short-wave antenna.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A short wave antenna performance evaluation system, the system comprising:
the system comprises an unmanned aerial vehicle, aerial test equipment, radio frequency transceiving equipment and central control equipment;
the aerial test equipment is carried on the unmanned aerial vehicle;
the radio frequency transceiver is connected with the short wave antenna to be detected, and is used for receiving an instruction of the central control equipment and controlling the short wave antenna to be detected to transmit a signal according to the instruction; detecting the power value of the short wave antenna to be detected, and transmitting the detected power value of the short wave antenna to be detected to the central control equipment;
the central control equipment is used for generating a flight control instruction to control the operation of the unmanned aerial vehicle by setting the flight height and the flight radius; sending the instruction to the radio frequency transceiving equipment; receiving the power value of the short wave antenna to be detected, which is sent by the radio frequency transceiving equipment; receiving a power amplifier output level value sent by the aerial test equipment; evaluating the radiation performance of the short wave antenna to be tested according to the power value of the short wave antenna to be tested and the power amplifier output level value;
the central control apparatus includes:
the third data transmission radio station, the third data exchange and control module, the upper computer, the flight control module data transmission radio station and the third power supply module; the third data exchange and control module is electrically connected with the third data transmission radio station and the upper computer at the same time, the upper computer is electrically connected with the flight control module data transmission radio station, and the third data transmission radio station, the third data exchange and control module, the upper computer and the flight control module data transmission radio station are electrically connected with the third power supply module;
the third data exchange and control module is used for sending a flight control instruction to the aerial test equipment through the flight control module data transmission radio station; receiving a power amplifier output level value sent by the air test equipment through the third data transmission station; sending an instruction to the radio frequency transceiving equipment through the third data transmission station, and receiving the power value of the short wave antenna to be detected, which is sent by the radio frequency transceiving equipment;
the upper computer is used for evaluating the radiation performance of the short wave antenna to be detected according to the power value of the short wave antenna to be detected and the power amplifier output level value received by the third data exchange and control module;
the third data exchange and control module can also be used for packing and storing the state information and the power amplifier output level value of the unmanned aerial vehicle in one register, and packing and storing the state information of the unmanned aerial vehicle and the power value of the short wave antenna to be detected in another register.
2. The system of claim 1, wherein the aerial test equipment comprises:
the device comprises a short wave antenna, a first power amplifier module, a first signal source, a first data exchange and control module, a first data transmission radio, a flight control module and a first power supply module; the first power amplifier module is simultaneously electrically connected with the short wave antenna and the first signal source, the first data exchange and control module is simultaneously electrically connected with the first signal source, the first data transmission radio and the flight control module, and the first power amplifier module, the first signal source, the first data exchange and control module and the first data transmission radio are all electrically connected with the first power supply module;
the short wave antenna is used for communicating with the short wave antenna to be detected;
the flight control module is used for acquiring the state information of the unmanned aerial vehicle, receiving a flight control instruction sent by the central control equipment, and controlling the unmanned aerial vehicle to operate according to the state information of the unmanned aerial vehicle and the flight control instruction;
the first data exchange and control module is used for acquiring state information of the unmanned aerial vehicle and a power amplifier output level value of the first power amplifier module, and transmitting the state information and the power amplifier output level value to the central control equipment through the first data transmission station.
3. The system of claim 2, wherein the aerial test equipment further comprises:
the system comprises a 900MHz data transmission antenna and a satellite antenna, wherein the 900MHz data transmission antenna and the satellite antenna are electrically connected with the flight control module.
4. The system of claim 1, wherein the radio frequency transceiver device comprises:
the second power amplifier module, the second signal source, the power detection module, the second data exchange and control module, the second data transmission station and the second power supply module; the second power amplifier module is simultaneously electrically connected with the short wave antenna to be detected and the second signal source, the second data exchange and control module is simultaneously electrically connected with the second signal source, the second data transmission station and the power detection module, and the second power amplifier module, the second signal source, the second data exchange and control module, the power detection module and the second data transmission station are electrically connected with the second power module;
the power detection module is used for detecting the power value of the short wave antenna to be detected;
the second data exchange and control module is used for receiving an instruction of the central control equipment and controlling the short wave antenna to be tested to transmit signals according to the instruction; and when receiving the state information of the unmanned aerial vehicle sent by the central control equipment, transmitting the power value of the short wave antenna to be detected to the central control equipment through the second digital radio station.
5. The system of claim 1, wherein the third data exchanging and controlling module is further configured to send a level query command to the over-the-air testing device when the power amplifier output level value sent by the over-the-air testing device is not received for more than a predetermined time interval.
6. The system of claim 1, wherein the upper computer is configured to perform correction and fitting on the power value of the short-wave antenna to be tested and the power amplifier output level value, and evaluate out-of-roundness, main lobe orientation, main lobe width, and front-to-back ratio of the short-wave antenna to be tested.
7. The system of claim 1, wherein the central control facility further comprises a differential positioning station electrically connected to the upper level.
8. The system according to any one of claims 1 to 7, wherein the radio frequency transceiver device is further connected to a standard short wave antenna, and the radio frequency transceiver device is further configured to detect a power value of the standard short wave antenna and transmit the detected power value of the standard short wave antenna to the central control device;
the central control equipment is further used for evaluating the gain performance of the short wave antenna to be detected according to the power value of the short wave antenna to be detected and the power value of the standard short wave antenna.
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| CN109581080B (en) * | 2018-12-21 | 2022-03-25 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Aerial test equipment for evaluating short wave antenna performance |
| CN112653525A (en) * | 2019-10-10 | 2021-04-13 | 联合汽车电子有限公司 | Test system |
| CN117713962A (en) * | 2023-12-08 | 2024-03-15 | 北斗天汇（北京）科技有限公司 | System and method for evaluating performance of short wave antenna |
| CN117879736B (en) * | 2024-03-13 | 2024-05-17 | 中国人民解放军海军工程大学 | Short wave environment noise or interference measuring method and device based on vector antenna |
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