CN117517847B - Miniaturized movable K-band broadband radiation testing system and method - Google Patents
Miniaturized movable K-band broadband radiation testing system and method Download PDFInfo
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- CN117517847B CN117517847B CN202410011008.1A CN202410011008A CN117517847B CN 117517847 B CN117517847 B CN 117517847B CN 202410011008 A CN202410011008 A CN 202410011008A CN 117517847 B CN117517847 B CN 117517847B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The system comprises a mobile platform, a main control module, a power amplification module and a transmitting array, wherein the main control module, the power amplification module and the transmitting array are arranged on the mobile platform and are cascaded in sequence: the beam emergence angle of the emission array on the horizontal plane is adjustable. The testing method comprises the steps that the position of a target area, which needs to generate the testing field intensity and the focal spot, on the horizontal plane is obtained, the main control module judges whether at least one target area is located in the beam emergent coverage area according to the current position of the testing system, if yes, the beam emergent angle of the transmitting array is adjusted according to the angle difference between the target area and the current position, the emergent beam is led to point to the target area, then the testing field intensity and the focal spot are generated in the target area, and if not, the judging result is output. The method and the device can reduce the moving frequency of the test system, are beneficial to improving the test efficiency and the accuracy of the test result, and simplify the operation of the test process.
Description
Technical Field
The disclosure relates to the technical field of electromagnetic compatibility testing, in particular to a miniaturized movable K-band broadband radiation testing system and method.
Background
With the popularization of electronic and electric equipment, especially K-band equipment, various electronic equipment is in a complex electromagnetic environment in practical application, and the problem of system electromagnetic incompatibility occurs. In order to fully expose and solve the electromagnetic compatibility problem of the system, an EMC (Electromagnetic Compatibility ) test system is generally constructed, an external radio frequency electromagnetic environment is formed for the device to be tested by means of the EMC test system, and an electromagnetic background environment when the electronic device is applied is simulated.
At present, a traditional EMC test system adopts a medium lens antenna or a parabolic antenna, a feed source (such as a horn antenna) is used for irradiating the medium lens, the curvature of the medium surface is designed based on a geometric optical method, waves incident from different positions of the lens arrive at a focus in phase, near-field focusing is realized, test field intensity and focal spot are generated in a target area, the lens antenna is adopted for focusing, the system section is higher, the radiation efficiency, the caliber efficiency and the power capacity are relatively lower, and the parabolic antenna is adopted for focusing, so that the defects of large volume, heavy weight, fixed focus position and difficult adjustment exist.
In actual application, in the test process of one device, the test field intensity is usually required to be generated in a plurality of target areas at different positions, the test system can be aligned to the target areas by moving the device to be tested, the alignment with the target areas can be realized by moving the test system for the device to be tested with large volume and inconvenient movement of an airplane, and in the actual operation at present, the device to be tested or the test system is mostly judged and moved manually, so that a certain artificial subjective error exists in the mode, and the device to be tested or the test system is frequently moved, so that inconvenience is brought to the test process, and the test efficiency and the accuracy of test results are reduced.
Disclosure of Invention
In order to solve the problems of the prior art, the disclosure aims to provide a miniaturized mobile K-band broadband radiation testing system and method. The test system can be conveniently moved, can realize beam emergent angle adjustment in a small angle range, can reduce the moving frequency of the test system, is beneficial to improving the test efficiency and the accuracy of test results, simplifies the operation of the test process, and has the advantages of compact structure, small volume and convenient movement.
The utility model discloses a miniaturized portable K wave band broadband radiation test system, including mobile platform and set up main control module, power amplifier module and the transmitting array on the mobile platform, main control module, power amplifier module and transmitting array cascade in proper order: the beam emergent angle of the transmitting array on the horizontal plane is adjustable, and the adjustable angle range is that；
Acquiring the position of a target area on a horizontal plane, which is required to generate a test field intensity and a focal spot, wherein the main control module combines the adjustable angle range of beam emission according to the current position of a test systemAnd obtaining a beam emergent coverage area of the current position, judging whether at least one target area is positioned in the beam emergent coverage area, if so, adjusting the beam emergent angle of the transmitting array according to the angle difference between the target area and the current position, enabling the emergent beam to point to the target area so as to generate test field intensity and focal spot in the target area, and if not, outputting a judging result.
Preferably, the adjustable angle range is definedThe current position of the test system is taken as the origin +.>The area of the test system at the current position and in the facing state where the beam is directed is +.>The target area is located at the position of->Judging whether or not +.>If yes, judging the target area->Is positioned in the beam emergent coverage area, otherwise, the target area is judged +.>And traversing all the target areas when the beam is not positioned in the beam emergent coverage range until all the target areas are judged and corresponding actions are executed.
Preferably, the miniaturized movable K-band broadband radiation testing system further comprises an adjusting module, wherein a horizontal plane is an X-Y plane, a vertical direction is a Z direction, a space rectangular coordinate system is established, the adjusting module has a motion degree of freedom capable of overturning in two directions around an X-Z axis and a Y-Z axis, the transmitting array is connected with the power amplification module, and the power amplification module is connected with the mobile platform through the adjusting module, so that the transmitting array has a two-direction rotation degree of freedom of X-Z, Y-Z.
Preferably, the testing system adopts an active phased array system, the transmitting array comprises a plurality of horn antennas which are distributed in a rectangular shape, the power amplifier module is connected with the transmitting array through an aperture conversion assembly, and the aperture conversion assembly and the transmitting array are in an integrated structure.
Preferably, the miniaturized movable K-band broadband radiation testing system further comprises:
the alarm module is electrically connected with the main control module;
and the power supply module is respectively and electrically connected with the main control module, the power amplification module, the transmitting module and the alarm module and is used for supplying power.
Preferably, the miniaturized movable K-band broadband radiation testing system further comprises:
the power module is linked with the mobile platform and used for driving the mobile platform to move, the main control module is in signal connection with the power module, and the main control module controls the power module according to the position of the target area on the horizontal plane so as to move the mobile platform to the position corresponding to the target area.
The K-band broadband radiation testing method disclosed by the invention is applied to the testing system, and comprises the following steps of:
acquiring the position of a target area on a horizontal plane, which is required to generate a test field intensity and a focal spot, moving a test system to the side of the device to be tested, and combining the adjustable angle range of beam emission according to the current position of the test systemAnd obtaining a beam emergent coverage area of the current position, judging whether at least one target area is positioned in the beam emergent coverage area, if so, adjusting the beam emergent angle of the transmitting array according to the angle difference between the target area and the current position, enabling the emergent beam to point to the target area so as to generate test field intensity and focal spot in the target area, and if not, outputting a judging result.
Preferably, when there are at least two target areas where the test field strength and focal spot need to be generated, the K-band broadband radiation test method comprises the following steps:
s01, acquiring the position of a target area on a horizontal plane;
s02, determining an initial test position according to the position of the target area on the horizontal plane, and when the test system moves to the initial test position, at least one target area is positioned in the beam emergent coverage area of the test system;
s03, moving the testing system to the initial testing position, so that the beam emergent direction of the testing system points to a target area in a range;
s04, starting a testing system, generating a testing field intensity and a focal spot in a target area to test equipment to be tested, and entering a step S05 after the testing of the current target area is completed;
s05, defining the adjustable angle rangeThe current position of the test system is taken as the origin +.>The area of the test system at the current position and in the facing state where the beam is directed is +.>The next target area is located at the position +.>Judging whether or not +.>If yes, judging the target area->Is located within the beam exit coverage area and is based on +.>Adjusting the amplitude phase difference value of the test system to enable the beam emergent direction to point to the target area +.>In the target area->Generating a test field intensity and a focal spot to test the equipment to be tested, otherwise judging the target area +.>Is not located within the beam exit coverage area; repeating the step, traversing all the target areas until all the target areas finish judgment and execute corresponding actions, and then entering step S06;
s06, moving the test system to the next test position according to the untested target area, and repeating the steps S04 and S05 until all the target areas are tested at least once, and completing the test process.
Preferably, in step S02, there is providedThe target areas are shared by the test positions opposite to the target areas as pre-selected points>A preselected point, which is taken as the middle point of the interval, according to the adjustable angle range +.>Obtain->And counting the number of the coverage areas which can be covered in each coverage area, and selecting a corresponding preselected point in the coverage area with the highest number of the coverage areas which can be covered as a starting test position.
Preferably, in step S06, a greedy algorithm is used to determine a next test position according to the untested target area, path planning is performed according to the position information of the current position of the test system and the determined position information of the next test position, and the test system is moved to the next test position according to the planned path.
The miniaturized movable K-band broadband radiation testing system and the method have the advantages that the beam emergent angle of the transmitting array on the horizontal plane is adjustable, so that the system can realize beam emergent angle adjustment within a small angle range, when the angle interval between the next target area and the current position of the testing system is smaller, namely the next target area is positioned in the beam emergent coverage area of the testing system, the position of the generated testing field intensity and focal spot can be changed by adjusting the beam emergent angle, and the testing field intensity and focal spot can be generated at the next target area, therefore, the testing field intensity and focal spot can be generated at different positions without moving the testing system, the moving frequency of the system can be reduced, the testing efficiency and the accuracy of the testing result can be improved, the operation of the testing process is simplified, and the system has the advantages of compact structure, small size and convenience in moving.
Drawings
FIG. 1 is a perspective view of a miniaturized mobile K-band broadband radiation testing system according to the present embodiment;
FIG. 2 is a rear view of a miniaturized mobile K-band broadband radiation testing system according to the present embodiment;
FIG. 3 is a schematic diagram of a miniaturized mobile K-band broadband radiation testing system according to the present embodiment;
FIG. 4 is a flowchart showing steps of a method for testing broadband radiation in the K band according to the present embodiment;
FIG. 5 is one of the test state diagrams of the K-band broadband radiation test method according to the present embodiment;
FIG. 6 is a second test state diagram of the K-band broadband radiation test method according to the present embodiment;
FIG. 7 is a third test state diagram of the K-band broadband radiation test method according to the present embodiment;
fig. 8 is a diagram showing a test state of the K-band broadband radiation test method according to the present embodiment.
Reference numerals illustrate: the system comprises a 1-mobile platform, a 2-main control module, a 3-power amplifier module, a 4-transmitting array, a 5-adjusting module, a 6-power supply module and a 7-alarm module.
Detailed Description
As shown in fig. 1-3, a miniaturized mobile K-band broadband radiation testing system according to the present disclosure includes a mobile platform 1, and a main control module 2, a power amplifier module 3 and a transmitting array 4 disposed on the mobile platform 1. The main control module 2, the power amplifier module 3 and the emission array 4 are cascaded in sequence, the beam emergent angle of the emission array 4 on the horizontal plane is adjustable, and the adjustable angle range is that。
When the test system of the embodiment executes the test task, the position of the target area on the horizontal plane, which needs to generate the test field intensity and the focal spot, is obtained, and the main control module is 2According to the current position of the test system, combining the emergent adjustable angle range of the wave beamThe beam emergent coverage area of the current position is obtained, namely, when the position of the testing system is unchanged, the area range which can be covered by adjusting the beam emergent angle of the transmitting array 4 on the horizontal plane is the beam emergent coverage area, when a target area is positioned in the beam emergent coverage area, the testing system does not need to be moved, and the emergent direction of the beam is changed to enable the emergent beam of the transmitting array 4 to point to any point in the range so as to generate the testing field intensity and the focal spot in the target area.
In actual testing, judging whether a target area to be tested is located in a beam emergent coverage area or not in the current position of the testing system, if so, testing the target area located in the range, namely adjusting the beam emergent angle of the transmitting array 4 according to the angle difference between the target area and the current position of the testing system, enabling the emergent beam to point to the target area so as to generate testing field intensity and focal spot in the target area, testing the target area, and if the target area to be tested does not exist in the beam emergent coverage area, outputting a judging result, if so, outputting a prompt of 'please move the testing system', and prompting an operator to move the testing system to other target areas to be tested.
Further, in order to accurately judge whether the target area is located in the beam emergent coverage area, and facilitate the realization of automatic judgment, the influence of artificial subjective judgment is reduced, in this embodiment, an adjustable angle range of the emergent beam of the test system is definedThe current position of the test system is taken as the origin +.>That is, the test system can cover the origin +.>Clockwise and anticlockwise direction respectively->And if the target area is positioned in the radian range, judging that the target area can be covered by the beam emergent (scanning) range, and testing the target area without moving a testing system.
The specific test process is as follows:
the area of the testing system, which is pointed by the wave beam in the current position and in the opposite state, isWherein the facing state refers to the direction perpendicular to the emitting end face of the emitting array 4, and the target area is located at a position +>As shown in fig. 5, in the actual testing process, a plane rectangular coordinate system of a horizontal plane can be established by obtaining a top view of the device to be tested and the testing system, the position of each target area can be determined by manually marking or inputting position parameters, real-time position information of the testing system on the horizontal plane can be obtained by a positioning module, and the position information of the testing system in the plane rectangular coordinate system can be obtained by converting the coordinate system of the positioning module with the plane rectangular coordinate system of the horizontal plane, so that the position information of the testing system in the plane rectangular coordinate system can be easily obtained>Is a function of the number of (c),specific representation area->Area->Further judging whether the central azimuth angle of +.>If yes, judging the target area->Is positioned in the beam emergent coverage area and can be instantly based on +.>Adjusting the beam emergent angle to enable the beam emergent direction to point to the target area +.>If not, repeating the step, continuing to judge the next target area until all the target areas are traversed, determining that all the target areas are judged and executing corresponding actions, namely judging whether each target area is located in the beam emergent coverage area of the current position of the test system, if so, adjusting the beam emergent angle to test the target area, otherwise, marking the target area as the target area out of range, taking all the target areas out of range as one set after traversing all the target areas, taking all the target areas which are completed to test as the other set, and outputting two sets as results for a tester to check.
Further, in this embodiment, as shown in fig. 1 in detail, the miniaturized movable K-band broadband radiation testing system further includes an adjusting module 5, a horizontal plane is an X-Y plane, a vertical direction is a Z-direction, a space rectangular coordinate system is established, the adjusting module 5 has a motion degree of freedom capable of turning around the X-Z axis and the Y-Z axis in two directions, the transmitting array 4 is connected with the power amplification module 3, the power amplification module 3 is connected with the mobile platform 1 through the adjusting module 5, so that the transmitting array 4 has a two-way rotation degree of freedom of X-Z, Y-Z, in a specific embodiment, the adjusting module 5 includes a two-axis turntable, the two-axis turntable is a polarization axis and a pitch axis, the horizontal plane is the X-Y plane, and a direction perpendicular to an exit end face of the transmitting array 4 is the X direction, so that the polarization axis and the X direction are in the same direction, the transmitting array 4 at the end can rotate around the X axis in the Y-Z direction, a range of travel of the polarization axis is limited to 0 ° to 90 ° corresponding to a horizontal polarization state, thereby realizing a high-purity control of polarization by switching between the horizontal polarization state and the vertical polarization state, and a high-purity polarization system is realized.
On the other hand, the embodiment also realizes the adjustment of the pitching angle of the emission array 4, namely the adjustment of the X-Z direction, the stroke range can be set to-25 degrees to 0 degrees, and the flexibility of the system use can be improved.
The test system adopts an active phased array system, an active array form is easy to realize miniaturization, and power synthesis is carried out in space to realize uniform field intensity meeting the requirement, namely the field intensity at the position 1m away from the antenna is not less than 590V/m, and the focal spot diameter of the 3dB field intensity is not less than 0.4m.
The phased array system can adjust the pointing angle of beam center emergent through changing amplitude phase difference value, and then realize beam forming, thereby adjusting the beam emergent angle on the horizontal plane without moving the test system entirely.
The transmitting array 4 comprises a plurality of horn antennas which are distributed in a rectangular mode, the power amplifier module 3 is connected with the transmitting array 4 through a caliber conversion assembly, and the caliber conversion assembly and the transmitting array 4 are in an integrated structure.
Further, the miniaturized mobile K-band broadband radiation testing system further includes:
the alarm module 7 is electrically connected with the main control module 2;
the power supply module 6 is respectively and electrically connected with the main control module 2, the power amplification module 3, the transmitting module and the alarm module 7 and is used for supplying power;
the power module is linked with the mobile platform 1 and is used for driving the mobile platform 1 to move, the main control module 2 is in signal connection with the power module, and the main control module 2 controls the power module according to the position of a target area on a horizontal plane so as to move the mobile platform 1 to a position corresponding to the target area.
In a specific embodiment, the main control module 2, the power amplifier module 3 and the power supply module 6 are generally integrated into the form of a main control chassis, a power amplifier chassis and a power supply chassis.
As shown in fig. 1, from left to right, the transmitting array 4 is located at the leftmost end and is fixed with the power amplifier case, the transmitting array 4 is connected with a radio frequency port of the power amplifier case through a radio frequency cable, the right end of the power amplifier case is fixed with the adjusting module 5, the alarm module 7 can be a warning lamp and/or a buzzer, and is fixed on the power amplifier case, can be a folding telescopic structure, and two water cooling pipes are connected at the lower end of the power amplifier case and used for cooling the power amplifier module 3.
As shown in fig. 2, the back structure of the test system is shown, the top is a panel, which has a reserved space and is reserved with an external signal source installation position, the second layer to the fourth layer are sequentially a power chassis, a servo chassis and a main control chassis from top to bottom, and the bottom is a mobile platform 1 for supporting and moving, so that the test system can be driven to move integrally by the mobile platform 1.
The power supply case is provided with an input and output port, the voltage input is AC380V (50 Hz), the voltage output is DC+24V to supply power to the alarm module 7, and DC+20V and DC+12V respectively supply power to the power amplifier module 3 and the main control module 2.
The main control module 2 is a system control core, parameters are set through a control panel of the main control module 2 according to use requirements, the power amplifier is controlled to be started and shut down, a command of the adjusting module 5 is issued, specifically, a polarization angle adjusting command or a pitch angle adjusting command is issued, a servo motor in a servo case rotates to drive a rotating shaft corresponding to the biaxial turntable to rotate, and further automatic adjustment of the polarization angle and the pitch angle is achieved.
Specifically, the adjusting module 5 drives the power amplifier case and the emission array 4 at the tail end, so that pitching rotation can be achieved, the travel range is-25-0 degrees, polarization angle adjustment can be achieved, the rotation range is 0-90 degrees, when the power amplifier case is located at the 0-degree position, the emission array 4 is horizontally polarized, when the power amplifier case is located at the 45-degree position, the emission array 4 is 45-degree polarized, and when the power amplifier case is located at the 90-degree position, the emission array 4 is vertically polarized. Therefore, the polarization angle can be adjusted, and the electromagnetic sensitivity test requirements of different polarization scenes can be met.
Referring to fig. 3 in detail, the power amplifier module 3 mainly includes an amplitude-phase control and power monitoring module and a final stage module, where the amplitude-phase control and power monitoring mainly performs control weighting on the amplitude phase of the radio frequency signal output by the final stage module, so as to implement beamforming, and at the same time, performs detection monitoring on the radio frequency signal output by the final stage module.
The final stage module mainly comprises a T component, a 1-division 2-power divider, a coupler, an attenuator and a detector, wherein the 1-division 2-power divider equally divides an input radio frequency signal, outputs 2 paths of equal-amplitude equal-phase radio frequency signals, and then feeds the 2T components respectively, the T component is a 4-channel power amplifier, each channel is provided with an independent digital phase shifter and a digital attenuator, the coupler couples and outputs the radio frequency signals output by the T component, the attenuator controls the coupling output power in a detectable range, and the detector detects the coupled and output radio frequency signals and outputs power analog signals which can be acquired by AD.
The transmitting antenna array and the caliber conversion assembly are designed integrally, the transmitting antenna array is specifically a horn antenna array with 8 x 8 rectangular distribution in azimuth pitching, the unit interval is 18.75mm, and the array face size is 150mm x 150mm.
The caliber conversion assembly is provided with a radio frequency signal input end at two sides, 32 SMA radio frequency input ports are respectively arranged at the left side and the right side, and the caliber conversion assembly converts 64 SMA radio frequency ports into waveguide radio frequency ports. The horn antenna array adopts waveguide port feed, the waveguide radio frequency output port with caliber conversion is directly connected with the waveguide port of the horn antenna array, and after caliber conversion, the power amplifier case outputs large caliber to antenna array feed small caliber conversion, and simultaneously, coaxial feed to waveguide feed conversion is completed.
The power module can select a driving module in the existing automatic vehicle, such as an automatic driving module of an AGV (automatic guided vehicle), generally comprises a driving unit, a steering unit and the like, and is used for automatically moving to a target area according to input position information, particularly in the embodiment, a test point position can be manually input or automatically generated according to the position of the target area, the position information of a test system is collected, a path is planned according to the test point position and the current position information of the test system, then the power module is used for controlling the moving platform 1 to move, so that the test system is moved to the test point position, automatic movement of the test system is realized, manual labor in the test process is further reduced, a tester does not need to be close to the test system in the test process, and damage to the tester caused by radiation is avoided.
As shown in detail in fig. 3, the principle of the miniaturized movable K-band broadband radiation testing system of the present embodiment is as follows:
the front-stage module of the main control cabinet receives the externally fed K-band signals, performs preliminary amplification, outputs the signals and feeds the signals into the power amplifier cabinet. The radio frequency signals fed into the power amplifier case are firstly subjected to 8 power division such as a 1-division 8-power divider and the like, 8 paths of radio frequency signals with the same amplitude and the like are output, and the 8 paths of signals are respectively fed into 8 input ports of the power amplifier case. The 8 input ports of the power amplifier case correspond to the 8 final stage modules in the power amplifier case. Taking one final stage module as an example, when the radio frequency signals are fed into the final stage module, the radio frequency signals are equally divided by a 1-division 2-power divider to output 2 paths of equal-amplitude equal-phase radio frequency signals. The signals are fed to 2T-components respectively. The radio frequency signals in the T components are subjected to phase modulation, amplitude modulation and amplification after being equally divided by 4, and finally 1T component outputs 4 paths of radio frequency signals with power not lower than 39dBm, and the amplitude phase of the 4 paths of signals is controlled by an amplitude-phase control and power monitoring module and can be a difference signal distributed according to a certain rule. Each T component is provided with 1 channel output port connected with a coupler, the coupler is coupled with the channel radio frequency signal, and the channel radio frequency signal is acquired by an amplitude-phase control and power monitoring module after attenuation and detection to monitor the working state of the T component. As can be seen from fig. 3, the power amplifier cabinet outputs 64 rf signals in total, and then feeds the rf signals into the transmitting array 4. And the amplitude phase of the 64 paths of radio frequency signals is independently controllable, and according to a beam pointing formula:
；
wherein,for beam centre pointing, +.>As phase difference values between units, the result is the phase difference value between units during scanning or pitching scanning, and the phase difference value is calculated by amplitude and phaseThe control and power monitoring module controls and realizes the phase difference of 64 paths of output signals of the power amplifier case, namely, the beam pointing control function. The beam emergent angle is adjusted by modulating the amplitude phase of each channel.
The simulation and test prove that the working frequency band of the miniaturized movable K-band broadband radiation system provided by the embodiment is K-band, the average field intensity which can be formed at the position 1m away from the antenna in the band is not less than 590V/m, and the diameter of a focal spot with 3dB field intensity is not less than 0.4m.
The embodiment also provides a K-band broadband radiation testing method, which is applied to the testing system and comprises the following steps:
acquiring the position of a target area on a horizontal plane, which is required to generate a test field intensity and a focal spot, moving a test system to the side of the device to be tested, and combining the adjustable angle range of beam emission according to the current position of the test systemAnd obtaining a beam emergent coverage area of the current position, judging whether at least one target area is positioned in the beam emergent coverage area, if so, adjusting the beam emergent angle of the transmitting array 4 according to the angle difference between the target area and the current position, so that the emergent beam points to the target area to generate test field intensity and focal spot in the target area, and if not, outputting a judging result.
More specifically, when there are at least two target areas where test field intensity and focal spot are required to be generated, the K-band broadband radiation test method includes the following steps:
s01, acquiring the position of a target area on a horizontal plane;
s02, determining an initial test position according to the position of the target area on the horizontal plane, and when the test system moves to the initial test position, at least one target area is positioned in the beam emergent coverage area of the test system;
s03, moving the testing system to the initial testing position, so that the beam emergent direction of the testing system points to a target area in a range;
s04, starting a testing system, generating a testing field intensity and a focal spot in a target area to test equipment to be tested, and entering a step S05 after the testing of the current target area is completed;
s05, defining the adjustable angle rangeThe current position of the test system is taken as the origin +.>The area of the test system at the current position and in the facing state where the beam is directed is +.>The next target area is located at the position +.>Judging whether or not +.>If yes, judging the target area->Is located within the beam exit coverage area and is based on +.>Adjusting the amplitude phase difference value of the test system to enable the beam emergent direction to point to the target area +.>In the target area->Generating a test field intensity and a focal spot to test the equipment to be tested, otherwise judging the target area +.>Is not located within the beam exit coverage area; repeating the step, traversing all the target areas until all the target areas finish judgment and execute corresponding actions, and then entering step S06;
s06, moving the test system to the next test position according to the untested target area, and repeating the steps S04 and S05 until all the target areas are tested at least once, and completing the test process.
FIG. 4 is a flow chart showing the steps of a simpler test procedure, i.e., a device under test having only two target areas to be tested, respectively defined as target areasAnd target area->. Target area->As a starting test position, the test system is moved to be right against the target area at the beginning of the test>Is in the target area->Generating a test field strength and a focal spot to the target area>Testing, wait->After the region test is completed, the task requires +.>The test is performed, so that a judgment step is performed to judge whether +.>If yes, judging the target area->Is located within the coverage area of the beam exit according to +.>Adjusting the direction of the emergent beam to enable the beam to be directed to the target area +.>In the target area->A test field strength and a focal spot are generated. If not, the test system is located at the current position and cannot cover the target area +.>It is necessary to move the test system to the exit beam facing the target area +.>Then starting the test system in the target area +.>A test field strength and a focal spot are generated.
The foregoing shows a simpler electromagnetic compatibility testing process, more specifically, as shown in fig. 5-8, the object to be tested is an aircraft, four target areas to be tested are all four, three of which are centrally located at the aircraft nose position, and the other is located at the wing position at one side, respectively defined as an area A, B, C, D, and an adjustable angle range is setI.e. +.>，/>Andare all equal to 20 DEG>Equal to 60 deg..
As described above, the test system is moved to beam-pointing target areaIs used as the initial test position in the target area +.>After the test is completed by generating the test field intensity and the focal spot, judging whether the test field intensity and the focal spot are satisfied by the steps>，I.e. satisfy->The direction of beam emergent is adjusted to the target area without moving a test systemThe direction is shifted by 20 degrees, so that the emergent beam is directed to the target area +.>Waiting for target area->After the test is completed, continuing to judge the target area +.>Whether or not to meet->Judging step and target area->The same shall not be described in detail here, and the target area is obtainedIs also positioned in the beam emergent coverage area, adjusts the beam emergent direction, and is positioned in the target area +.>And generating a test field intensity and a focal spot for testing, and judging the last region D after the test is completed.
Namely, the target area D is located outside the beam emergent coverage area of the current position of the test system, so that the test system needs to be moved, the test system is moved to a position opposite to the target area D, the target area D is tested, and after the test of the target area D is completed, all the target areas are tested once, and the test process is finished.
Further, in step S02, there is providedThe target areas are shared by the test positions opposite to the target areas as pre-selected points>A preselected point, which is taken as the middle point of the interval, according to the adjustable angle range +.>Obtain->And counting the number of the target areas which can be covered in each coverage area, and selecting a preselected point corresponding to the coverage area with the highest number of the target areas which can be covered as a starting test position (if more than two exist, any one of the target areas is selected). In the step, a preselected point with the highest concentration of the target area is selected as the initial test position, so that the test of more target areas can be completed at the initial test position, the test data can be obtained quickly, and the operation is convenient.
In step S06, determining a next test position according to the untested target area by using a greedy algorithm, specifically, selecting the next test position by using the greedy algorithm for solving the coverage problem of the section, and taking the test position opposite to each target area as the test position along the clockwise or anticlockwise direction of the initial test positionThe preselected point, i.e. the mid-point of the interval in greedy algorithm, being in an adjustable angular rangeIs +.>And->As two boundary values between coverage areas, a greedy algorithm is used for determining each test position, so that each selected test position can cover as many target areas as possible, namely, the selected test positions are as few as possible, the selected test positions are ordered according to a clockwise or anticlockwise direction, a test system is sequentially moved to each test position, and then the test of all the target areas can be completed.
More specifically, path planning is performed according to the position information of the current position of the test system and the determined position information of the next test position, the test system is moved to the next test position according to the planned path, in a specific embodiment, the geometric center of the device to be tested is used as the circle center, circles are made on the periphery of the device to be tested at certain intervals according to the parameters of the test system and the test requirements, all the test positions are located on the circles, and the periphery of the device to be tested is kept clear without barriers during testing, so that the moving path planning of the test system is simpler, the linear path planning can be performed according to the position information of the current position and the position information of the next test position, then the test system is driven to move to the next test position through a power module, the step can realize automatic planning of the moving path of the test system, manual operation can be further simplified, and the test efficiency can be improved.
In the description of the present disclosure, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and simplify the description, and without being otherwise described, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be configured and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the invention as defined in the claims.
Claims (8)
1. The miniaturized movable K-band broadband radiation testing system is characterized by comprising a mobile platform, and a main control module, a power amplification module and a transmitting array which are arranged on the mobile platform, wherein the main control module, the power amplification module and the transmitting array are sequentially cascaded: the beam emergent angle of the transmitting array on the horizontal plane is adjustable, and the adjustable angle range is that；
Acquiring the position of a target area on a horizontal plane, which is required to generate a test field intensity and a focal spot, wherein the main control module combines the adjustable angle range of beam emission according to the current position of a test systemAcquiring a beam emergent coverage area of a current position, judging whether at least one target area is positioned in the beam emergent coverage area, if yes, adjusting the beam emergent angle of the transmitting array according to the angle difference between the target area and the current position, enabling an emergent beam to point to the target area so as to generate test field intensity and focal spot in the target area, and if not, outputting a judging result;
when at least two target areas needing to generate test field intensity and focal spot exist, testing is carried out according to the following steps:
acquiring the position of a target area on a horizontal plane;
determining an initial test position according to the position of the target area on the horizontal plane, and when the test system moves to the initial test position, at least one target area is positioned in the beam emergent coverage area of the test system;
moving the testing system to the initial testing position, so that the beam emergent direction of the testing system points to a target area in a range;
starting a testing system, generating a testing field intensity and a focal spot in a target area to test equipment to be tested, and entering a next step after the testing of the current target area is completed;
defining the adjustable angle rangeThe current position of the test system is taken as the origin +.>The area of the test system at the current position and in the facing state where the beam is directed is +.>The next target area is located at the position +.>Judging whether or not to meetIf yes, judging the target area->Is located within the beam exit coverage area and is based on +.>Adjusting the amplitude phase difference value of the test system to enable the beam emergent direction to point to the target area +.>In the target area->Generating a test field intensity and a focal spot to test the equipment to be tested, otherwise judging the target area +.>Is not located within the beam exit coverage area; repeating the step, traversing all the target areas until all the target areas finish judgment and execute corresponding actions, and then entering the next step;
according to the untested target area, the testing system is moved to the next testing position, the testing steps are repeated until all the target areas are tested at least once, and the testing process is completed;
and determining a next test position by using a greedy algorithm according to the untested target area, planning a path according to the position information of the current position of the test system and the determined position information of the next test position, and enabling the test system to move to the next test position according to the planned path.
2. The miniaturized mobile K-band broadband radiation testing system of claim 1 wherein the adjustable angle range is definedThe current position of the test system is taken as the origin +.>The area of the test system at the current position and in the facing state where the beam is directed is +.>The target area is located at the position of->Judging whether or not +.>If yes, judging the target area->Is positioned in the beam emergent coverage area, otherwise, the target area is judged +.>And traversing all the target areas when the beam is not positioned in the beam emergent coverage range until all the target areas are judged and corresponding actions are executed.
3. The miniaturized movable K-band broadband radiation testing system according to claim 1, further comprising an adjusting module, wherein a horizontal plane is an X-Y plane, a vertical direction is a Z direction, a space rectangular coordinate system is established, the adjusting module has a motion degree of freedom capable of turning around the X-Z axis and the Y-Z axis in two directions, the transmitting array is connected with the power amplifier module, and the power amplifier module is connected with the mobile platform through the adjusting module, so that the transmitting array has a two-direction rotation degree of freedom of X-Z, Y-Z.
4. The miniaturized movable K-band broadband radiation testing system according to claim 1, wherein the testing system adopts an active phased array system, the transmitting array comprises a plurality of horn antennas distributed in a rectangular shape, the power amplifier module is connected with the transmitting array through a caliber conversion assembly, and the caliber conversion assembly and the transmitting array are in an integrated structure.
5. The miniaturized mobile K-band broadband radiation testing system of claim 1 further comprising:
the alarm module is electrically connected with the main control module;
and the power supply module is respectively and electrically connected with the main control module, the power amplification module, the emission array and the alarm module and is used for supplying power.
6. The miniaturized mobile K-band broadband radiation testing system of claim 1 further comprising:
the power module is linked with the mobile platform and used for driving the mobile platform to move, the main control module is in signal connection with the power module, and the main control module controls the power module according to the position of the target area on the horizontal plane so as to move the mobile platform to the position corresponding to the target area.
7. A method for testing broadband radiation in the K-band, using the test system according to any one of claims 1-6, comprising the steps of:
acquiring the position of a target area on a horizontal plane, which is required to generate a test field intensity and a focal spot, moving a test system to the side of the device to be tested, and combining the adjustable angle range of beam emission according to the current position of the test systemAcquiring a beam emergent coverage area of a current position, judging whether at least one target area is positioned in the beam emergent coverage area, if yes, adjusting the beam emergent angle of the transmitting array according to the angle difference between the target area and the current position, enabling an emergent beam to point to the target area so as to generate test field intensity and focal spot in the target area, and if not, outputting a judging result;
when at least two target areas needing to generate test field intensity and focal spot exist, the K-band broadband radiation test method comprises the following steps:
s01, acquiring the position of a target area on a horizontal plane;
s02, determining an initial test position according to the position of the target area on the horizontal plane, and when the test system moves to the initial test position, at least one target area is positioned in the beam emergent coverage area of the test system;
s03, moving the testing system to the initial testing position, so that the beam emergent direction of the testing system points to a target area in a range;
s04, starting a testing system, generating a testing field intensity and a focal spot in a target area to test equipment to be tested, and entering a step S05 after the testing of the current target area is completed;
s05, defining the adjustable angle rangeThe current position of the test system is taken as the origin +.>The area of the test system at the current position and in the facing state where the beam is directed is +.>The next target area is located at the position +.>Judging whether or not +.>If yes, judging the target area->Is located within the beam exit coverage area and is based on +.>Adjusting the amplitude phase difference value of the test system to enable the beam emergent direction to point to the target area +.>In the target area->Generating a test field intensity and a focal spot to test the equipment to be tested, otherwise judging the target area +.>Is not located within the beam exit coverage area; repeating the step, traversing all the target areas until all the target areas finish judgment and execute corresponding actions, and then entering step S06;
s06, moving the test system to the next test position according to the untested target area, repeating the steps S04 and S05 until all the target areas are tested at least once, and completing the test process;
in step S06, a greedy algorithm is used to determine a next test position according to the untested target area, and path planning is performed according to the position information of the current position of the test system and the determined position information of the next test position, so that the test system moves to the next test position according to the planned path.
8. The method for testing broadband radiation of claim 7, wherein in step S02, the step of providing comprisesThe target areas are shared by the test positions opposite to the target areas as pre-selected points>A preselected point, which is taken as the middle point of the interval, according to the adjustable angle range +.>Obtain->And counting the number of the coverage areas which can be covered in each coverage area, and selecting a corresponding preselected point in the coverage area with the highest number of the coverage areas which can be covered as a starting test position.
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