CN112104431A - Phased array antenna measurement error correction method, device and measurement system - Google Patents
Phased array antenna measurement error correction method, device and measurement system Download PDFInfo
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Abstract
The embodiment of the invention provides a method, a device and a system for correcting measurement errors of a phased array antenna, and relates to the technical field of testing. According to the phased array antenna measurement error correction method, the phased array antenna measurement error correction device and the phased array antenna measurement error correction system, the marking time of the marking signal sent when the rotating mechanism rotates to each marking point is recorded, the correction time is calculated according to the position of each marking point and the marking time corresponding to each marking point, the sampling time of sampling test based on the test state point is corrected according to the correction time, and then the sampling position of sampling test based on the test state point is corrected, so that the accurate positioning of the sampling position is realized, and the measurement accuracy of the phased array antenna is improved.
Description
Technical Field
The invention relates to the technical field of testing, in particular to a method, a device and a system for correcting measurement errors of a phased array antenna.
Background
The phased array antenna is used as an array antenna with controllable unit phase shift, and beam forming and scanning are realized by controlling the amplitude and phase distribution of a array surface. In order to evaluate the beam performance of the phased array antenna in the full airspace and the full bandwidth, a large number of tests need to be performed, and although the existing phased array antenna test method realizes multi-state tests by means of hardware or software, the test precision of the phased array antenna test method still needs to be improved.
Disclosure of Invention
Based on the above research, the present invention provides a method, an apparatus, and a measurement system for correcting measurement errors of a phased array antenna, so as to improve the above problems.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment of the present invention provides a method for correcting a measurement error of a phased array antenna, where the method is applied to a control device in a measurement system, the measurement system further includes a rotating mechanism, and the control device controls a motion of the phased array antenna through the rotating mechanism; the method comprises the following steps:
acquiring test state points of the phased array antenna, and calculating sampling time for performing sampling test based on the test state points;
recording the marking time of a marking signal sent when the rotating mechanism rotates to each marking point; the rotating mechanism is provided with a plurality of marking points, and when the rotating mechanism rotates to each marking point, a marking signal is sent to the control equipment, wherein the marking signal comprises the positions of the marking points;
calculating to obtain correction time according to the position of each marking point and the marking time corresponding to each marking point;
and correcting the sampling time according to the correction time so as to correct the sampling position for sampling test based on the test state point.
In an optional embodiment, the step of calculating to obtain the correction time according to the position of each of the mark points and the mark time corresponding to each of the mark points includes:
according to the position of each marking point and the marking time corresponding to each marking point, calculating the correction time by the following formula:
wherein x0 is the calculated correction time,
is as followspThe position of the individual marks is determined,pis the serial number of the tag and,
to receive the rotation of the rotating mechanism to the secondpThe time of the mark of the signal transmitted at the time of the mark,Vis the speed of movement of the rotating mechanism,xto correct for time variations, a is a non-negative integer.
In an alternative embodiment, the method further comprises the step of calculating the speed of movement of the rotating mechanism: the steps include:
according to the test state number of the phased array antenna, the sampling interval and the test time of a single test state point, the movement speed of the rotating mechanism is calculated through the following formula:
wherein the content of the first and second substances,Sin order to test the number of states,S(= number of frequencies x number of bits of wave,
is the test time for a single test condition point,
is the sampling interval.
In an optional embodiment, after the sampling time is modified, the method further comprises:
calculating to obtain a target sampling position for sampling test based on the test state point according to the movement speed of the rotating mechanism and the corrected sampling time;
and correcting the sampling position for sampling test based on the test state point according to the target sampling position.
In an optional embodiment, the measurement system further includes a measurement device, and the measurement device is configured to measure a signal of the phased array antenna and send a trigger signal to the control device after the measurement is completed; the step of calculating a sampling time for performing a sampling test based on the test state point includes:
according to the test state point of the phased array antenna, switching the state of the phased array antenna, and triggering the measuring equipment to perform sampling test on the signal of the phased array antenna;
recording a first time point for triggering the measuring equipment and a second time point for receiving a trigger signal sent when the measuring equipment completes testing;
and calculating the sampling time of the test state point according to the average value of the first time point and the second time point.
In an optional embodiment, the measurement system further comprises a data processing device, wherein the data processing device is configured with the frequency point and the wave point of the phased array antenna; the step of obtaining test state points of the phased array antenna comprises:
receiving at least one frequency point and wave position point sent by the data processing equipment;
generating at least one test state point according to each frequency point and wave site; different ones of the test state points characterize the phased array antenna in states at different frequencies and different wave positions.
In a second aspect, an embodiment of the present invention provides a device for correcting a measurement error of a phased array antenna, which is applied to a control device in a measurement system, where the measurement system further includes a rotating mechanism, and the control device controls a motion of the phased array antenna through the rotating mechanism; the device comprises a time calculation module and a time correction module;
the time calculation module is used for acquiring test state points of the phased array antenna, calculating sampling time for sampling test based on the test state points, recording marking time of a marking signal sent when the rotating mechanism rotates to each marking point, and calculating correction time according to the position of each marking point and the marking time corresponding to each marking point; the rotating mechanism is provided with a plurality of marking points, and when the rotating mechanism rotates to each marking point, a marking signal is sent to the control equipment, wherein the marking signal comprises the positions of the marking points;
and the time correction module is used for correcting the sampling time according to the correction time so as to correct the sampling position for sampling test based on the test state point.
In a third aspect, an embodiment of the present invention provides a measurement system, where the measurement system includes a control device and a rotation mechanism, where the control device controls a motion of a phased array antenna through the rotation mechanism, and the rotation mechanism is provided with a plurality of mark points;
the control equipment is used for acquiring test state points of the phased array antenna and calculating sampling time for carrying out sampling test based on the test state points;
the rotating mechanism is used for sending a marking signal to the control equipment when rotating to each marking point, and the marking signal comprises the position of the marking point;
the control equipment is used for recording the marking time of the marking signal sent when the rotating mechanism rotates to each marking point, calculating according to the position of each marking point and the marking time corresponding to each marking point to obtain correction time, and correcting the sampling time of the test state point according to the correction time so as to correct the sampling position of the test state point.
In a fourth aspect, an embodiment of the present invention provides a control device, which includes a processor and a non-volatile memory storing computer instructions, where the computer instructions, when executed by the processor, implement the phased array antenna measurement error correction method according to any one of the foregoing embodiments.
In a fifth aspect, an embodiment of the present invention provides a readable storage medium, in which a computer program is stored, and the computer program is executed to implement the phased array antenna measurement error correction method according to any one of the foregoing embodiments.
According to the phased array antenna measurement error correction method, the phased array antenna measurement error correction device and the phased array antenna measurement error correction system, the marking time of the marking signal sent when the rotating mechanism rotates to each marking point is recorded, the correction time is calculated according to the position of each marking point and the marking time corresponding to each marking point, the sampling time of sampling test based on the test state point is corrected according to the correction time, and then the sampling position of sampling test based on the test state point is corrected, so that the accurate positioning of the sampling position is realized, and the measurement accuracy of the phased array antenna is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a measurement system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a test status table according to an embodiment of the present invention.
FIG. 3 is a sequence diagram of the present invention.
FIG. 4 is a timing diagram of another sequencing method according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a timing principle according to an embodiment of the present invention.
Fig. 6 is a diagram of a multi-frequency-point multi-wave-position directional diagram according to an embodiment of the present invention.
Fig. 7 is a schematic flowchart of a method for correcting measurement errors of a phased array antenna according to an embodiment of the present invention.
Fig. 8 is a block diagram of an apparatus for correcting measurement error of a phased array antenna according to an embodiment of the present invention.
Fig. 9 is a block diagram of a control device according to an embodiment of the present invention.
Icon: 1-a measurement system; 100-a control device; 10-phased array antenna measurement error correction device; 11-a time calculation module; 12-a time correction module; 20-a memory; 30-a processor; 40-a communication unit; 200-a rotation mechanism; 300-a measuring device; 400-a data processing device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The fast measurement of the phased array antenna is a complex and difficult technical subject, relates to efficient microwave signal measurement, high-precision mechanical positioning, echo-free environment error correction and the like, and has the advantages of more test items, complex test and large data volume compared with the common passive antenna test. Therefore, how to shorten the measurement time of the phased array antenna and improve the test precision of the phased array antenna has important significance for reducing the production cost of the antenna.
Efficiency and precision are two important evaluation indexes for phased array antenna testing, but the efficiency and the precision cannot be obtained at the same time, and only proper balance can be obtained between the efficiency and the precision.
The existing rapid test method for the phased array antenna realizes multi-state test by means of hardware or software, improves the efficiency to a certain extent compared with single-state automatic test and manual test, can realize rapid measurement of the phased array antenna, and needs to improve the test precision. Most of existing rapid test methods for phased array antennas are provided with position feedback devices on a rotary table, and when signals of the phased array antennas are subjected to sampling tests, sampling positions are fed back, but errors exist in the sampling positions (test positions) due to the fact that the rotary table controlling the phased array antennas to rotate rotates all the time, and therefore test precision is affected.
In order to meet the requirement of high precision, the prior art proposes a mode of performing stepping measurement by using a high-precision turntable, but the mode reduces the testing speed and affects the testing efficiency, wherein the positioning time of the turntable is a main factor for restricting the speed increase.
Based on the above research, the present embodiment provides a method, an apparatus, and a measurement system for correcting a measurement error of a phased array antenna, in which a mark time of a mark signal sent when a rotation mechanism rotates to each mark point is recorded, a correction time is calculated according to a position of each mark point and a mark time corresponding to each mark point, a sampling time for performing a sampling test based on a test state point is corrected according to the correction time, and then a sampling position for performing a sampling test based on the test state point is corrected, so that high-precision positioning of the sampling position is achieved, accuracy of measurement of the phased array antenna is improved, and a test speed is ensured.
Referring to fig. 1, fig. 1 is a block diagram of a measurement system 1 provided in the present embodiment. As shown in fig. 1, the measurement system 1 provided by the present embodiment includes a control apparatus 100, a measurement apparatus 300, a rotation mechanism 200, and a data processing apparatus 400. The measuring device 300 is used for measuring signals of the phased array antenna, the rotating mechanism 200 is used for driving the phased array antenna to rotate under the control of the control device 100, the data processing device 400 is used for storing and processing test data of the phased array antenna, and the control device 100 controls each test element (the measuring device 300, the data processing device 400, the rotating mechanism 200 and the like) of the phased array antenna to cooperatively work by using a synchronization signal or a trigger signal, so that the error correction of the phased array antenna measurement is realized.
Optionally, in this embodiment, the data processing device 400 may be an industrial personal computer, and the measurement device 300 may be a vector network analyzer.
In order to reduce the transmission time of the data signal, the control device 100 may be connected to the measurement device 300, the rotating mechanism 200, and the data processing device 400 through a Network, which may be a Wireless Network, a remote Communication Network, an intranet, the internet, a Local Area Network (LAN), a Wide Area Network (WAN), a Wireless Local Area Network (WLAN), a Metropolitan Area Network (MAN), a Wide Area Network (WAN), a bluetooth Network, a ZigBee Network, or a Near Field Communication (NFC) Network, or the like, or any combination thereof.
Optionally, in this embodiment, the control device 100 is connected to the measurement device 300, the rotation mechanism 200, and the data processing device 400 through a local area network LAN, respectively, and data transmission is realized through a network.
Optionally, in this embodiment, the control device 100 is further connected to the measurement device 300, the rotation mechanism 200, and the phased array antenna through Transistor-Transistor Logic (TTL) lines, respectively, and implements synchronization and triggering through TTL level signals, and performs communication through a network port or a serial port.
In this embodiment, the control device 100 is further connected to the phased array antenna, and is configured to switch the state of the phased array antenna according to the obtained test state point.
The test state points of the phased array antenna may be obtained based on test parameters stored in the data processing apparatus 400, where the test parameters include at least one frequency point and a wave position point of the phased array antenna.
When the phased array antenna needs to be tested, the data processing device 400 sends at least one frequency point and wave locus of the phased array antenna to the control device 100, and after receiving the frequency point and wave locus sent by the data processing device 400, the control device 100 generates at least one test state point according to each frequency point and wave locus.
To facilitate the control device 100 to obtain the test status point, optionally, in this embodiment, the opposite phase is requiredWhen the phased array antenna is tested, the data processing device 400 may generate a two-dimensional test state table according to the configured frequency point and wave point, and then send the test state table to the control device 100. For example, when the frequency point of the phased array antenna isMWave site isNWhen it is used, formM*NAs shown in FIG. 2, FIG. 2
The point of the frequency is represented by,
representing the wave site.
After the test state table is generated, the test state table is sent to the control device 100, and the control device 100 obtains the test state point according to the frequency point and the wave site in the test state table. Wherein the number of test state points is the product of the number of frequency points and the number of wave sites, e.g. when the frequency points of the phased array antenna in the test state table areMWave site isNTime by time, number of test state points generated correspondinglyS=M*N。
Different test state points characterize the phased array antenna in different frequencies and different wave positions. As shown in FIG. 2, each point in the table corresponds to a test status point, and the set of test status points can be represented as
Wherein, in the step (A),
i.e., a state indicating that the phased array antenna is at the ith frequency point, the jth wave site,
，
。
after obtaining the test state points of the phased array antenna, the control apparatus 100The phased array antenna may be switched based on the acquired test state point, e.g., when the test state point is represented as frequency F0Wave position P0In a state of (c), the control apparatus 100 switches the frequency of the phased array antenna to F0Switching the wave position to P0. While switching the state of the phased array antenna, the measurement device 300 may be triggered to measure the phased array antenna to obtain data of the phased array antenna at the current test state point.
In order to ensure the accuracy of the test, in this embodiment, the test state point switching of the phased array antenna should be synchronized with the acquisition of the measurement device 300, that is, when the control device 100 switches the test state of the phased array antenna according to a certain test state point, the measurement device 300 needs to acquire data of the phased array antenna under the test state point for testing, after the measurement device 300 completes the acquisition test of the test state point, the control device 100 will switch to the next test state point, and switch the state of the phased array antenna according to the next test state point, as shown in the test timing diagram shown in fig. 3, after the measurement device 300 completes the test of the current test state point, the control device 100 will switch to the next test state point.
Optionally, the control device 100 may implement the test state point switching and the synchronization of the acquisition by the measurement device 300 through a synchronization signal.
In this embodiment, when there are a plurality of test state points, the test state points may be sequentially switched and tested according to a set sequence and a point-triggered mode.
As shown in fig. 4, for each trigger period, the test state point may be triggered in a mode of inner loop before outer loop, and the test state point may be switched and tested. Wherein the inner loop corresponds to the wave position and the outer loop corresponds to the frequency. For example, in conducting the test, at FiFrequency, P0The wave position is used as the first test state point of the internal loop, and the F < th > isiFrequency, P1The wave position is used as the second test state point of the internal loop, and the F < th > pointiFrequency, P2Taking one wave level as a third test state point of the internal circulation, and so onUp to F of the internal circulationiFrequency, PN-1After the state test of each wave bit is finished, an outer loop is triggered to Fi+1Testing at each frequency, Fi+1Frequency, P0Taking the wave position as the first test state point of the internal circulation to test the F-th wave positioni+1Frequency, P1The wave position is used as the second test state point of the internal loop to test, and so on, till the F-th test state point of the internal loopi+1Frequency, PN-1After the state test of each wave bit is finished, triggering the outer circulation again to Fi+2Test is carried out at each frequency until all test state points in the trigger period are tested.
In this embodiment, each complete trigger cycle includes all the test state points, for example, as shown in FIG. 3, when the frequency point isMWave site isNAt one time, it is common in every complete trigger cycleS=M*NAnd each test state point is tested only once in one trigger period.
After obtaining the test state point, the control device 100 switches the state of the phased array antenna according to the obtained test state point, and simultaneously sends a trigger signal to the measurement device 300 according to the test state point, so as to trigger the measurement device 300 to perform sampling test on the signal of the phased array antenna at the current test state point (corresponding to the switched state), and simultaneously record a first time point for sending the trigger signal. After receiving the trigger signal, the measurement device 300 performs a sampling test on the signal of the phased array antenna in the current test state, and after completing the test, returns the trigger signal to the control device 100, so that the control device 100 switches the state of the phased array antenna according to the next test state point.
When the control device 100 receives the trigger signal returned by the measurement device 300, the second time point of receiving the trigger signal returned by the measurement device 300 is recorded, the sampling time of the measurement device 300 for performing the sampling test based on the current test state point is calculated according to the recorded average value of the first time point and the second time point, and the sampling position is calculated according to the sampling time.
As shown in fig. 4, the control device 100 may trigger the measurement device 300 to perform a test through the trigger signal TriggerIn1, and the measurement device 300 completes the test and sends a trigger signal TriggerOut1 to the control device 100, so as to trigger the control device 100 to switch the state of the phased array antenna according to the next test state point.
For example, the time point when TriggerIn1 is sent out at the test state point of j wave bits at the ith frequency point of the c-th trigger period, that is, the time point when the measurement device 300 is triggered can be recorded as the time point
The time point corresponding to the receipt of TriggerOut1 can be recorded as
Wherein, in the step (A),
，
，
，Qfor a total number of triggered cycles at the completion of the test,Mis the number of the frequency points,Nis the wave digit number.
The sampling time of the test state point in the ith frequency point j wave bits of the c trigger period can be
The sampling position can be calculated according to the movement speed and the sampling time of the rotating mechanism 200 to obtain:
wherein the content of the first and second substances,
in order to be able to sample the location,Vis a rotary structureThe speed of the motor vehicle is set to be,
is the sampling time.
Because the calculated sampling position may deviate from the actual position, in order to further improve the sampling precision and achieve the high-precision standard, the measurement system 1 provided by this embodiment calculates a time correction coefficient through the rotation process of the rotation mechanism 200, corrects the calculated sampling time through the time correction coefficient, and further corrects the calculated sampling position, thereby achieving the precise positioning of the sampling position.
In this embodiment, the test elements in the measurement system 1 are synchronized, so that the test elements are aligned in time, i.e. the start times are the same, and the calculated sampling time can be corrected by the time correction factor calculated during the rotation.
In the present embodiment, a plurality of mark points are provided on the rotating mechanism 200, the rotating mechanism 200 transmits a mark signal including the positions of the mark points to the control device 100 when rotating to each mark point, and after the control device 100 receives the mark signal transmitted by the rotating mechanism 200, the mark time when the mark signal is received and the positions of the mark points included in the mark signal are recorded.
For example, when the rotating mechanism 200 rotates to any one of the marking points, a marking signal is transmitted to the control device 100
Wherein, in the step (A),
is a position ofpA position is shown as
，(
) And TriggerIn2 represents a trigger signal. Control module receives the turnThe time of receipt of the marker signal transmitted by the actuator 200 is recorded and may be expressed as
Of 1 atpTime corresponding to each position
。
After receiving the position of each mark point and the mark time corresponding to each mark point, the control device 100 may calculate a correction time, i.e., a time correction coefficient, according to the position of each mark point and the mark time corresponding to each mark point.
Optionally, after obtaining the marking time corresponding to each marking point when the rotating structure rotates, the control device 100 may calculate, according to the position of each marking point and the marking time corresponding to each marking point, the correction time by using the following formula:
wherein x0 is the calculated correction time,
is as followspThe position of the individual marks is determined,pis the serial number of the tag and,
to receive the rotation of the rotating mechanism 200 to the secondpThe time of the mark of the signal transmitted at the time of the mark,Vas the speed of movement of the rotating mechanism 200,xto correct for time variations.
Optionally, discrete points a +2 may be arbitrarily selected as mark points on the rotating mechanism 200, where the mark points include a start point, an end point, and a mark position points, where a is a non-negative integer.
And after the correction time is obtained through calculation, correcting the calculated sampling time according to the correction time by using time alignment to obtain the corrected sampling time. After the corrected sampling time is obtained, the target sampling position can be calculated according to the movement speed of the rotating mechanism 200 and the corrected sampling time, and the sampling position based on the sampling test of the test state point can be corrected according to the target sampling position, so that the high-precision positioning of the sampling position is realized, and the measurement accuracy of the phased array antenna is greatly improved.
For example, in the test state point of j wave positions of the ith frequency point in the c-th trigger period, the corrected sampling positions are:
wherein the content of the first and second substances,
in order to obtain the corrected sampling position,Vin order to speed the rotation of the mechanism 200,
is the corrected sampling time.
Assume that the number of test points per test state point isQI.e. in total haveQIn each trigger period, the set of sampling positions of the test state point of the j wave bits of the ith frequency point in different trigger periods can be represented as
。
In the present embodiment, the movement speed of the rotating mechanism 200 can be calculated by the following formula:
wherein the content of the first and second substances,Sin order to test the number of states,S(= number of frequencies x number of bits of wave,
in the form of a single testThe test time of the state point can be directly obtained from the measuring device 300,
is a sampling interval (in general, a sampling interval)
Wherein, in the step (A),
for the 3dB width of the beam,
，
in order to obtain the value coefficient,
the smaller the value, the smaller the sampling interval).
It should be noted that, in the present embodiment, the rotational positioning of the rotating mechanism 200 and the sampling test of the measuring apparatus 300 are performed simultaneously, and they do not interfere with each other. Referring to fig. 5, after obtaining the test state point, the control device 100 sends a synchronization signal to the phased array antenna and the measurement device 300, then the control device 100 switches the state of the phased array antenna according to the test state point, and triggers the measurement device 300 to test the phased array antenna at the current test state point through the TriggerIn1 signal, and after the measurement device 300 completes the test, the measurement device sends a TriggerOut1 signal to the control device 100, and at the same time, the rotation mechanism 200 is in motion all the time, and when moving to a marker point, sends TriggerIn2 to the control device 100.
And the control device 100 records the time sent by the TriggerIn1 and the time of receiving the TriggerOut1 returned by the measuring device 300 through a timer, and also records the marking time of the TriggerIn2 sent when the rotating mechanism 200 rotates to each marking point.
The control device 100 calculates the sampling time of the measurement device 300 by the time sent by the TriggerIn1 and the time of receiving the TriggerOut1 returned by the measurement device 300, calculates the correction time of the rotation mechanism 200 by receiving the marking time of the TriggerIn2 sent when the rotation mechanism 200 rotates to each marking point, then corrects the calculated sampling time by using time alignment according to the correction time, realizes accurate positioning of the sampling position, and improves the accuracy of phased array antenna measurement.
Optionally, in order to improve the testing efficiency, in this embodiment, the obtained test data is transmitted to the data processing device 400 in a batch-and-time manner in an asynchronous transmission manner, and the data processing device 400 performs processing such as integration, conversion, and smoothing. For example, the data processing device 400 integrates the corrected sampling position and the measurement data to obtain the performance index of the phased array antenna after receiving the corrected sampling position transmitted by the control device 100 and the measurement data transmitted by the measurement device 300. As shown in fig. 6, fig. 6 is a test chart of multiple frequency points and multiple wave bits provided in this embodiment, where each curve represents amplitude data of a test state at different sampling positions.
The measurement system provided by this embodiment obtains the correction time by recording the mark time of the mark signal sent when the rotation mechanism is rotated to each mark point, and calculating according to the position of each mark point and the mark time corresponding to each mark point, and corrects the sampling time of the sampling test based on the test state point according to the correction time by using time alignment, and further corrects the sampling position of the sampling test based on the test state point, thereby realizing high-precision positioning of the sampling position.
The positioning error of the measurement system provided by the embodiment depends on the time determination accuracy, but the TTL time transmission signal is adopted in the embodiment, and the time error caused by signal transmission can be greatly reduced due to the short transmission delay time (only 5-10 ns) of the TTL, so the measurement positioning accuracy is equivalent to the stepping positioning measurement.
In addition, in the measurement system provided by this embodiment, on the premise of ensuring the accuracy, the phased array antenna can perform continuous multi-frequency-point and multi-wave-position automatic measurement, the test time can be greatly compressed, and is no longer limited by the movement time and the positioning time of the rotating mechanism, the test time is not counted in the test positioning of the phased array antenna, and the test time only includes the instrument acquisition time and the phased array antenna state switching time, and meanwhile, the transmission time of the test data is transmitted asynchronously, and the transmission time can be ignored. Compared with the stepping hard trigger test, the test speed can be increased by one order of magnitude, and the test efficiency and speed are ensured.
In addition, the measurement system provided by the embodiment does not need to change wires or other manual operations in the measurement process, the test flows such as state switching, test control, data processing and the like are automatically realized by software and hardware, the test process is clear and standard, and one-key automation of the test can be conveniently realized.
Referring to fig. 7, fig. 7 is a schematic flow chart of a method for correcting measurement errors of a phased array antenna according to the present embodiment based on the architecture of the measurement system shown in fig. 1. The method for correcting the measurement error of the phased array antenna provided by the embodiment is applied to the control device 100 in fig. 1, and is executed by the control device 100 in fig. 1. The flowchart shown in fig. 7 is explained in detail below.
Step S10: and acquiring test state points of the phased array antenna, and calculating sampling time for sampling test based on the test state points.
Step S20: and recording the marking time of the signal sent when the rotating mechanism rotates to each marking point.
Step S30: and calculating to obtain the correction time according to the position of each marking point and the marking time corresponding to each marking point.
Step S40: and correcting the sampling time according to the correction time so as to correct the sampling position for sampling test based on the test state point.
According to the method for correcting the measurement error of the phased array antenna, the marking time of the marking signal sent when the rotating mechanism rotates to each marking point is recorded, the correction time is obtained through calculation according to the position of each marking point and the marking time corresponding to each marking point, the sampling time for carrying out sampling test on the basis of the test state point is corrected according to the correction time, then the sampling position for carrying out sampling test on the basis of the test state point is corrected, the accurate positioning of the sampling position is achieved, and the measurement accuracy of the phased array antenna is improved.
In an optional embodiment, the step of calculating the correction time according to the position of each mark point and the mark time corresponding to each mark point includes:
according to the position of each marking point and the marking time corresponding to each marking point, calculating the correction time through the following formula:
wherein x0 is the calculated correction time,
is as followspThe position of the individual marks is determined,pis the serial number of the tag and,
to receive the rotation of the rotating mechanism to the secondpThe time of the mark of the signal transmitted at the time of the mark,Vin order to determine the speed of movement of the rotating mechanism,xto correct for time variations, a is a non-negative integer.
In an optional implementation manner, the method for correcting the measurement error of the phased array antenna provided by this embodiment further includes a step of calculating a movement speed of the rotating mechanism, where the step includes:
according to the test state number of the phased array antenna, the sampling interval and the test time of a single test state point, the movement speed of the rotating mechanism is calculated through the following formula:
wherein the content of the first and second substances,Sin order to test the number of states,S(= number of frequencies x number of bits of wave,
is the test time for a single test condition point,
is the sampling interval.
In an optional implementation manner, after correcting the sampling time, the method for correcting the measurement error of the phased array antenna provided in this embodiment further includes:
and calculating to obtain a target sampling position for sampling test based on the test state point according to the movement speed of the rotating mechanism and the corrected sampling time.
And correcting the sampling position for sampling test based on the test state point according to the target sampling position.
In an optional embodiment, the measurement system further includes a measurement device, and the measurement device is configured to measure a signal of the phased array antenna and send a trigger signal to the control device after the measurement is completed. The step of calculating the sampling time for the sampling test based on the test state point includes:
and switching the state of the phased array antenna according to the test state point of the phased array antenna, and triggering the measuring equipment to perform sampling test on the signal of the phased array antenna.
Recording a first time point for triggering the measuring equipment and a second time point for receiving a trigger signal sent when the measuring equipment completes the test.
And calculating the sampling time of the test state point according to the average value of the first time point and the second time point.
In an optional embodiment, the measurement system further comprises a data processing device, wherein the data processing device is configured with the frequency point and the wave site of the phased array antenna; the step of obtaining test state points for the phased array antenna includes:
and receiving at least one frequency point and a wave position point transmitted by the data processing equipment.
Generating at least one test state point according to each frequency point and each wave site; different test state points characterize the phased array antenna at different frequencies and different wave positions.
It can be understood that, for a specific working process of the method for correcting the measurement error of the phased array antenna provided in this embodiment, reference may be made to the corresponding process in the measurement system 1, which is not described herein again.
On the basis, please refer to fig. 8 in combination, the present embodiment provides a device 10 for correcting a measurement error of a phased array antenna, which is applied to a control device 100 in a measurement system 1, wherein the measurement system 1 further includes a rotating mechanism, and the control device controls the motion of the phased array antenna through the rotating mechanism; the device comprises a time calculation module 11 and a time correction module 12.
The time calculation module 11 is configured to obtain a test state point of the phased array antenna, calculate sampling time for performing sampling test based on the test state point, record marking time of a marking signal sent when the rotation mechanism rotates to each marking point, and calculate correction time according to a position of each marking point and the marking time corresponding to each marking point; the rotating mechanism is provided with a plurality of marking points, and when rotating to each marking point, the rotating mechanism sends a marking signal to the control equipment, wherein the marking signal comprises the positions of the marking points.
The time correction module 12 is configured to correct the sampling time according to the correction time, so as to correct the sampling position where the sampling test is performed based on the test state point.
It can be understood that, for a specific working process of the device for correcting the measurement error of the phased array antenna provided in this embodiment, reference may be made to a corresponding process in the foregoing measurement system, which is not described in detail herein.
On the basis of the above, the present embodiment further provides a control apparatus 100, which includes a processor 30 and a non-volatile memory 20 storing computer instructions, wherein the computer instructions, when executed by the processor 30, implement the phased array antenna measurement error correction method according to any one of the foregoing embodiments.
As shown in fig. 9, the control apparatus 100 may include a phased array antenna measurement error correction device 10, a memory 20, a processor 30, and a communication unit 40.
The elements of the memory 20, the processor 30 and the communication unit 40 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The device 10 for correcting measurement error of the phased array antenna comprises at least one software functional module which can be stored in the memory 20 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the control device 100. The processor 30 is used to execute executable modules stored in the memory 20, such as software functional modules and computer programs included in the phased array antenna measurement error correction apparatus 10.
The communication unit 40 is used for establishing a communication connection between the control device 100 and other devices (e.g., the measurement device 300, the rotating mechanism 200) via a network, and for transmitting and receiving data via the network.
The configuration shown in fig. 9 is merely illustrative, and the control apparatus 100 may include more or fewer components than shown in fig. 9, or have a different configuration than shown in fig. 9. The components shown in fig. 9 may be implemented in hardware, software, or a combination thereof.
It can be understood that, for the specific working process of the control device 100 provided in this embodiment, reference may be made to the corresponding process in the foregoing measurement system, and redundant description is not repeated here.
On the basis of the foregoing, an embodiment of the present invention provides a readable storage medium, in which a computer program is stored, and the computer program, when executed, implements the phased array antenna measurement error correction method according to any one of the foregoing embodiments.
It can be understood that, for a specific working process of the readable storage medium provided in this embodiment, reference may be made to a corresponding process in the foregoing measurement system, and redundant description is not repeated here.
In summary, according to the method, the device and the system for correcting the measurement error of the phased array antenna provided by the embodiment of the invention, the marking time of the marking signal sent when the rotating mechanism rotates to each marking point is recorded, the correction time is calculated according to the position of each marking point and the marking time corresponding to each marking point, the sampling time for performing the sampling test based on the test state point is corrected according to the correction time, and then the sampling position for performing the sampling test based on the test state point is corrected, so that the accurate positioning of the sampling position is realized, and the accuracy of the phased array antenna measurement is improved.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The method for correcting the measurement error of the phased array antenna is characterized by being applied to control equipment in a measurement system, wherein the measurement system further comprises a rotating mechanism, and the control equipment controls the phased array antenna to move through the rotating mechanism; the method comprises the following steps:
acquiring test state points of the phased array antenna, and calculating sampling time for performing sampling test based on the test state points;
recording the marking time of a marking signal sent when the rotating mechanism rotates to each marking point; the rotating mechanism is provided with a plurality of marking points, and when the rotating mechanism rotates to each marking point, a marking signal is sent to the control equipment, wherein the marking signal comprises the positions of the marking points;
calculating to obtain correction time according to the position of each marking point and the marking time corresponding to each marking point;
and correcting the sampling time according to the correction time so as to correct the sampling position for sampling test based on the test state point.
2. The method of claim 1, wherein the step of calculating a correction time according to the position of each marker point and the marker time corresponding to each marker point comprises:
according to the position of each marking point and the marking time corresponding to each marking point, calculating the correction time by the following formula:
wherein x0 is the calculated correction time,
is as followspThe position of the individual marks is determined,pis the serial number of the tag and,
to receive the rotation of the rotating mechanism to the secondpThe time of the mark of the signal transmitted at the time of the mark,Vis the speed of movement of the rotating mechanism,xto correct for time variations, a is a non-negative integer.
3. The method of claim 2, further comprising the step of calculating a speed of movement of the rotating mechanism: the steps include:
according to the test state number of the phased array antenna, the sampling interval and the test time of a single test state point, the movement speed of the rotating mechanism is calculated through the following formula:
wherein the content of the first and second substances,Sin order to test the number of states,S(= number of frequencies x number of bits of wave,
is the test time for a single test condition point,
is the sampling interval.
4. The phased array antenna measurement error correction method of claim 3, after correcting the sampling time, the method further comprising:
calculating to obtain a target sampling position for sampling test based on the test state point according to the movement speed of the rotating mechanism and the corrected sampling time;
and correcting the sampling position for sampling test based on the test state point according to the target sampling position.
5. The method according to claim 1, wherein the measurement system further comprises a measurement device for measuring the signals of the phased array antenna and sending a trigger signal to the control device after the measurement is completed; the step of calculating a sampling time for performing a sampling test based on the test state point includes:
according to the test state point of the phased array antenna, switching the state of the phased array antenna, and triggering the measuring equipment to perform sampling test on the signal of the phased array antenna;
recording a first time point for triggering the measuring equipment and a second time point for receiving a trigger signal sent when the measuring equipment completes testing;
and calculating the sampling time of the test state point according to the average value of the first time point and the second time point.
6. The phased array antenna measurement error correction method according to claim 1, characterized in that the measurement system further comprises a data processing device, wherein the data processing device is configured with a frequency point and a wave point of the phased array antenna; the step of obtaining test state points of the phased array antenna comprises:
receiving at least one frequency point and wave position point sent by the data processing equipment;
generating at least one test state point according to each frequency point and wave site; different ones of the test state points characterize the phased array antenna in states at different frequencies and different wave positions.
7. The device for correcting the measurement error of the phased array antenna is characterized by being applied to control equipment in a measurement system, wherein the measurement system further comprises a rotating mechanism, and the control equipment controls the phased array antenna to move through the rotating mechanism; the device comprises a time calculation module and a time correction module;
the time calculation module is used for acquiring test state points of the phased array antenna, calculating sampling time for sampling test based on the test state points, recording marking time of a marking signal sent when the rotating mechanism rotates to each marking point, and calculating correction time according to the position of each marking point and the marking time corresponding to each marking point; the rotating mechanism is provided with a plurality of marking points, and when the rotating mechanism rotates to each marking point, a marking signal is sent to the control equipment, wherein the marking signal comprises the positions of the marking points;
and the time correction module is used for correcting the sampling time according to the correction time so as to correct the sampling position for sampling test based on the test state point.
8. A measuring system is characterized by comprising a control device and a rotating mechanism, wherein the control device controls the motion of a phased array antenna through the rotating mechanism, and a plurality of mark points are arranged on the rotating mechanism;
the control equipment is used for acquiring test state points of the phased array antenna and calculating sampling time for carrying out sampling test based on the test state points;
the rotating mechanism is used for sending a marking signal to the control equipment when rotating to each marking point, and the marking signal comprises the position of the marking point;
the control equipment is used for recording the marking time of the marking signal sent when the rotating mechanism rotates to each marking point, calculating according to the position of each marking point and the marking time corresponding to each marking point to obtain correction time, and correcting the sampling time of the test state point according to the correction time so as to correct the sampling position of the test state point.
9. A control device comprising a processor and a non-volatile memory having stored thereon computer instructions which, when executed by the processor, implement the phased array antenna measurement error correction method of any one of claims 1 to 6.
10. A readable storage medium, having stored thereon a computer program which, when executed, implements the phased array antenna measurement error correction method of any of claims 1-6.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1531795A (en) * | 2001-02-20 | 2004-09-22 | 摩托罗拉公司 | Time synchronization of satellite positioning system enabled mobile receiver and base station |
| CN101741477A (en) * | 2008-11-26 | 2010-06-16 | 爱思开电讯投资（中国）有限公司 | Method and device for executing measuring process in mobile terminal |
| CN105281851A (en) * | 2015-10-28 | 2016-01-27 | 南方科技大学 | Method and device for rapidly detecting sensitivity of wireless radio-frequency receiver |
| CN108333556A (en) * | 2018-01-31 | 2018-07-27 | 成都泰格微波技术股份有限公司 | A kind of multichannel direction-finding receiver calibration system and method based on error correction |
| CN109245835A (en) * | 2018-12-07 | 2019-01-18 | 爱立信(中国)通信有限公司 | method and apparatus for antenna calibration |
| CN109239736A (en) * | 2018-07-28 | 2019-01-18 | 上海航天电子有限公司 | A kind of phase array antenna beam error in pointing modification method |
| WO2019099390A1 (en) * | 2017-11-14 | 2019-05-23 | Atc Technologies, Llc | Localized content delivery platform |
| CN110426670A (en) * | 2018-12-26 | 2019-11-08 | 西安电子科技大学 | External illuminators-based radar super-resolution DOA estimation method based on TLS-CS |
| CN110730044A (en) * | 2019-09-18 | 2020-01-24 | 深圳市艾特讯科技有限公司 | Radio frequency test channel positioning method and device, radio frequency test system and control terminal |
| WO2020022816A1 (en) * | 2018-07-25 | 2020-01-30 | 삼성전자 주식회사 | Device and method for calibrating phased array antenna |
| CN110927751A (en) * | 2019-12-09 | 2020-03-27 | 中国电子科技集团公司第五十四研究所 | Array antenna self-adaptive correction implementation method based on carrier phase measurement |
| CN111526484A (en) * | 2019-02-02 | 2020-08-11 | 索尼公司 | Apparatus, method and storage medium for wireless communication system |
-
2020
- 2020-11-23 CN CN202011316861.2A patent/CN112104431B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1531795A (en) * | 2001-02-20 | 2004-09-22 | 摩托罗拉公司 | Time synchronization of satellite positioning system enabled mobile receiver and base station |
| CN101741477A (en) * | 2008-11-26 | 2010-06-16 | 爱思开电讯投资（中国）有限公司 | Method and device for executing measuring process in mobile terminal |
| CN105281851A (en) * | 2015-10-28 | 2016-01-27 | 南方科技大学 | Method and device for rapidly detecting sensitivity of wireless radio-frequency receiver |
| WO2019099390A1 (en) * | 2017-11-14 | 2019-05-23 | Atc Technologies, Llc | Localized content delivery platform |
| CN108333556A (en) * | 2018-01-31 | 2018-07-27 | 成都泰格微波技术股份有限公司 | A kind of multichannel direction-finding receiver calibration system and method based on error correction |
| WO2020022816A1 (en) * | 2018-07-25 | 2020-01-30 | 삼성전자 주식회사 | Device and method for calibrating phased array antenna |
| CN109239736A (en) * | 2018-07-28 | 2019-01-18 | 上海航天电子有限公司 | A kind of phase array antenna beam error in pointing modification method |
| CN109245835A (en) * | 2018-12-07 | 2019-01-18 | 爱立信(中国)通信有限公司 | method and apparatus for antenna calibration |
| CN110426670A (en) * | 2018-12-26 | 2019-11-08 | 西安电子科技大学 | External illuminators-based radar super-resolution DOA estimation method based on TLS-CS |
| CN111526484A (en) * | 2019-02-02 | 2020-08-11 | 索尼公司 | Apparatus, method and storage medium for wireless communication system |
| CN110730044A (en) * | 2019-09-18 | 2020-01-24 | 深圳市艾特讯科技有限公司 | Radio frequency test channel positioning method and device, radio frequency test system and control terminal |
| CN110927751A (en) * | 2019-12-09 | 2020-03-27 | 中国电子科技集团公司第五十四研究所 | Array antenna self-adaptive correction implementation method based on carrier phase measurement |
Non-Patent Citations (2)
| Title |
|---|
| 岳寅 等: "宽带相控阵雷达发射多波束形成和雷达通信一体化技术研究", 《中国博士学位论文全文数据库》 * |
| 郑楷 等: "粒子群优化算法在天线罩误差斜率控制中的应用", 《弹箭与制导学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118033573A (en) * | 2024-04-11 | 2024-05-14 | 成都天成电科科技有限公司 | Phased array antenna pattern acquisition method, device, equipment and medium |
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|---|---|
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