Automatic test system for multi-beam direction-finding front end

Abstract

The invention discloses an automatic test system for a multi-beam direction-finding front end. The system comprises automatic test software (1), a signal source (2), a horn antenna (3), a servo turntable (4), a network switch (5), a central control machine (6) and a multi-channel video detection board (7), a tested piece is fixed on the servo turntable (4), the automatic test software (1) is loaded in the central control machine (6), the horn antenna (3) transmits an output working signal of the signal source (2) to the servo turntable (4), and the multi-channel video detection board (7) transmits the output working signal of the signal source (2) to the central control machine (6). The signal source (2), the servo turntable (4) and the multi-channel video detection board (7) are respectively connected with the network switch (5), and the network switch (5) is connected with the central control machine (6). According to the invention, the technical problems of low test sensitivity, large workload and long time caused by the traditional manual one-by-one channel when the direction-finding test is carried out on the N-beam direction-finding equipment in the direction and the frequency band at present are solved.

Description

Technical Field

[0001] The invention relates to the technical field of electronic countermeasures, and in particular to an automatic testing system for a multi-beam direction finding front end. Background Art

[0002] With the increasing complexity of the electromagnetic environment in modern battlefields, the role and status of electronic countermeasures are becoming more and more important, and the performance requirements for direction-finding systems are also getting higher and higher. Passive direction-finding technology is a key technology for electronic countermeasures. In order to counter reconnaissance and anti-interference, the modulation style and modulation parameters of modern radar signals have the characteristics of time-varying, rapidity and wide range, which brings great difficulties to the reconnaissance and identification of electronic countermeasures. In addition, with the increasing complexity of the electromagnetic environment and the diversification of the actual combat environment, the requirements for the adaptability and accuracy of direction-finding methods under different combat conditions are also getting higher and higher.

[0003] The multi-beam amplitude comparison direction finding method has the advantages of high direction finding accuracy, simple structure, stable performance, strong adaptability to complex environments, small size and low cost. At the same time, the amplitude comparison direction finding method can greatly improve the antenna gain, thereby increasing the detection distance and having beyond-visual-range reconnaissance capability. It also has strong anti-interference (multipath effect) capability and multi-beam simultaneous processing capability.

[0004] The multi-beam amplitude comparison direction finding equipment is wide open in azimuth and broadband in frequency. When testing the direction finding accuracy of N-beam direction finding equipment in azimuth and frequency band, the consistency of N channels must be ensured first, that is, the consistency test of N channels must be completed to find the channels with poor consistency and make adjustments to meet the technical requirements. Therefore, the debugging and testing of direction finding accuracy is a very complex and tedious task, with a very large workload and a long time consumption. Using an automatic test system to detect the multi-beam direction finding front end can reduce the workload and shorten the production cycle, which is of great significance to engineering applications. Summary of the invention

[0005] The embodiment of the present invention provides an automatic test system for a multi-beam direction finding front end, which at least solves the technical problem that when performing direction finding tests on N-beam direction finding equipment in azimuth and frequency band, the test is performed manually one channel at a time, resulting in low test sensitivity, heavy workload and long time.

[0006] According to one aspect of an embodiment of the present invention, an automatic test system for a multi-beam direction finding front end is provided. The system may include: automated test software (1), a signal source (2), a horn antenna (3), a servo turntable (4), a network switch (5), a central control machine (6) and a multi-channel video detection board (7), wherein a device under test is fixed on the servo turntable (4), the automated test software (1) is loaded in the central control machine (6), the horn antenna (3) transmits the output working signal of the signal source (2) to the servo turntable (4), the signal source (2), the servo turntable (4) and the multi-channel video detection board (7) are respectively connected to the network switch (5), and the network switch (5) is connected to the central control machine (6). The automated testing software (1) is used to control the signal source (2) to output a working signal according to the frequency and power set in the signal source setting table; when the working signal is at a first working frequency point, control the servo turntable (4) to adjust the device under test to an initial azimuth angle and an initial pitch angle, receive the target angle of the device under test sent by the multi-channel video detection board (7) and the initial angle sent by the servo turntable (4), and determine whether any channel test of the device under test at the first frequency point is correct based on the initial angle and the target angle; the signal source (2) is used to receive the signal source setting table sent by the central control machine (6), and output the working signal to the horn antenna (3) according to the frequency and power set in the signal source setting table; the horn antenna (3) is used to receive the working signal output by the signal source (2), and The working signal is radiated to the servo turntable (4); the servo turntable (4) is used to receive the working signal radiated by the horn antenna (3); when the initial pitch angle remains unchanged, the initial azimuth angle is rotated stepwise to the initial angle according to the azimuth angle test; based on the initial angle, any channel of the device under test is controlled to correspond to the signal source (2), and the initial angle is sent to the central control machine (6) through the network switch (5); the device under test is used to obtain the signal value of each channel when each channel receives the signal source, and send the signal value of each channel to the multi-channel video detection board (7); the multi-channel video detection board (7) is used to calculate the signal value of each channel to obtain the target angle of the device under test, and send the target angle to the central control machine (6) through the network switch (5).

[0007] Optionally, based on the initial angle and the target angle, determine whether the test of any channel of the device under test at the first frequency point is correct, including: comparing the initial angle and the target angle to obtain the angle difference, when the angle difference is less than or equal to the preset angle difference, determine that the test of any channel of the device under test at the first frequency point is correct; when the angle difference is greater than the preset angle difference, determine that the test of any channel of the device under test at the first frequency point is wrong.

[0008] Optionally, the system also includes: before performing automated testing, setting the detection frequency range and frequency step of the device under test, and setting the operating frequency point that needs to be tested for the device under test during the test; setting the azimuth test range and test step of the device under test, and setting the azimuth angle test step that needs to be tested for the device under test during the test; setting the pitch test range and test step of the device under test, and setting the pitch angle test step that needs to be tested for the device under test during the test.

[0009] Optionally, the system also includes: during the automated testing process, when the pitch angle of the device under test remains unchanged, the azimuth angle keeps changing according to the azimuth angle test step to test whether the device under test is correct at each operating frequency point; after the azimuth angle test is completed, the azimuth angle of the device under test remains unchanged, and the pitch angle keeps changing according to the pitch angle test step to test whether the device under test is correct at each operating frequency point.

[0010] Optionally, the system further comprises: during the automated test process, the test result of any channel of the device under test at each frequency point is saved in the central control machine (6), and the central control machine (6) generates a test report based on the test result, wherein the test result includes a correct test and a test error.

[0011] Optionally, the system further includes: during the automated test, when any channel test error occurs at any frequency point at any elevation angle or any azimuth angle of the device under test, it is determined that the device under test has a test error.

[0012] Optionally, the system further includes: during the automated test, when any channel of the device under test at each frequency point at each pitch angle or each azimuth angle is tested correctly, it is determined that the device under test is tested correctly.

[0013] Beneficial effects of the present invention:

[0014] The present invention proposes an automatic test system for a multi-beam direction finding front end, comprising: a tested piece is fixed on a servo turntable (4), an automatic test software (1) is loaded on a central control machine (6), the servo turntable (4) is controlled to adjust to a required test angle through a network switch (5), a signal source (2) transmits a target frequency and power, and then the central control machine (6) records the video data of a multi-channel video detection board (7) under the current situation, and then the signal source switches to the next frequency point until the current angle test is completed, and the system automatically switches to the next angle to start the test until the full range test is completed, thereby solving the current problem of N-beam direction finding. When the direction finding equipment conducts direction finding tests in azimuth and frequency band, the traditional manual channel-by-channel test leads to technical problems such as low test sensitivity, heavy workload and long time. Multi-channel video detection is used for testing to complete the video of each channel of the DUT more quickly. The performance of the DUT can be detected from any angle and any frequency point according to the requirements of the DUT specification. The automatic test software can solve the indicators such as sensitivity, dynamic range and amplitude consistency of the DUT by classifying, processing and calculating the tested video data. In addition, this device can intuitively reflect the technical effect of channel consistency between multiple DUTs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 is a schematic diagram of an automatic test system for a multi-beam direction finding front end according to an embodiment of the present invention;

[0017] Figure 2 is a work flow chart of an automatic test system for a multi-beam direction finding front end according to an embodiment of the present invention;

[0018] Figure 3 The present invention is a schematic diagram of an automatic test software operation interface for a multi-beam direction finding front end according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] Example 1

[0022] According to an embodiment of the present invention, an automatic testing system for a multi-beam direction finding front end is provided. Figure 1 is a schematic diagram of an automatic test system for a multi-beam direction finding front end according to an embodiment of the present invention, such as Figure 1 As shown, the system may include: automated testing software (1), a signal source (2), a horn antenna (3), a servo turntable (4), a network switch (5), a central control machine (6) and a multi-channel video detection board (7), wherein a device under test is fixed on the servo turntable (4), the automated testing software (1) is loaded in the central control machine (6), the horn antenna (3) transmits the output working signal of the signal source (2) to the servo turntable (4), the signal source (2), the servo turntable (4) and the multi-channel video detection board (7) are respectively connected to the network switch (5), and the network switch (5) is connected to the central control machine (6).

[0023] The automated testing software (1) is used to control a signal source (2) to output a working signal according to the frequency and power set in a signal source setting table; when the working signal is at a first working frequency point, control a servo turntable (4) to adjust the device under test to an initial azimuth angle and an initial pitch angle; receive a target angle of the device under test sent by a multi-channel video detection board (7) and an initial angle sent by the servo turntable (4); and determine whether any channel test of the device under test at the first frequency point is correct based on the initial angle and the target angle.

[0024] In this embodiment, the device under test is a multi-beam direction finding front end, and the automated test software (1) controls the signal source (2) so that the signal source (2) outputs a working signal according to the frequency and power set in the signal source setting table. If the working signal is a first working frequency point, and the first working frequency point is 700 MHz, the device under test is mounted on a servo turntable (4), and the servo turntable (4) is controlled to adjust the device under test to an initial azimuth angle and an initial pitch angle, and the target angle of the device under test sent by the multi-channel video detection board (7) and the initial angle sent by the servo turntable (4) are received. According to the initial angle and the target angle, it is obtained whether the device under test is tested correctly or incorrectly on any channel of the first frequency point.

[0025] The signal source (2) is used to receive a signal source setting table sent by a central control machine (6), and output a working signal to a horn antenna (3) according to the frequency and power set in the signal source setting table.

[0026] The horn antenna (3) is used to receive the working signal output by the signal source (2) and radiate the working signal to the servo turntable (4).

[0027] The servo turntable (4) is used to receive the working signal radiated by the horn antenna (3). When the initial pitch angle remains unchanged, the initial azimuth angle is rotated stepwise to the initial angle according to the azimuth angle test. Based on the initial angle, any channel of the device under test is controlled to correspond to the signal source (2), and the initial angle is sent to the central control machine (6) through the network switch (5).

[0028] In this embodiment, the horn antenna (3) radiates the working signal to the servo turntable (4). When the initial pitch angle remains unchanged, the initial azimuth angle is rotated step by step according to the azimuth angle test. Based on the initial angle, any channel of the device under test is controlled to correspond to the signal source (2), and the initial angle is sent to the central control machine (6) through the network switch (5), wherein any channel of the device under test and the signal source (2) can correspond directly or partially.

[0029] The device under test is used to obtain the signal value of each channel when each channel receives a signal source, and send the signal value of each channel to a multi-channel video detection board (7).

[0030] In this embodiment, when each channel of the device under test receives a signal source, a signal value of each channel is obtained, and the signal value of each channel is sent to the multi-channel video detection board (7).

[0031] The multi-channel video detection board (7) is used to calculate the signal value of each channel to obtain the target angle of the tested object, and send the target angle to the central control machine (6) through the network switch (5).

[0032] In this embodiment, the multi-channel video detection board (7) calculates the signal value of each channel to obtain the target angle of the device under test, and sends the target angle to the central control machine (6) through the network switch (5).

[0033] The above modules of this embodiment are further introduced below.

[0034] Optionally, based on the initial angle and the target angle, determine whether the test of any channel of the device under test at the first frequency point is correct, including: comparing the initial angle and the target angle to obtain the angle difference, when the angle difference is less than or equal to the preset angle difference, determine that the test of any channel of the device under test at the first frequency point is correct; when the angle difference is greater than the preset angle difference, determine that the test of any channel of the device under test at the first frequency point is wrong.

[0035] In this embodiment, the initial angle and the target angle are subtracted to obtain an angle difference. If the angle difference is less than or equal to the preset angle difference, then any channel test of the device under test at the first frequency point is correct; if the angle difference is greater than the preset angle difference, then any channel test of the device under test at the first frequency point is incorrect.

[0036] Optionally, the system may also include: before conducting automated testing, setting the detection frequency range and frequency step of the device under test, and setting the operating frequency point that needs to be tested for the device under test during the test; setting the azimuth test range and test step of the device under test, and setting the azimuth angle test step that needs to be tested for the device under test during the test; setting the pitch test range and test step of the device under test, and setting the pitch angle test step that needs to be tested for the device under test during the test.

[0037] In this embodiment, before performing automated testing, the detection frequency range and frequency step of the device under test are set, and the operating frequency point that needs to be tested when the device under test is tested is set; the azimuth test range and test step of the device under test are set, and the azimuth angle test step that needs to be tested when the device under test is tested is set; the pitch test range and test step of the device under test are set, and the pitch angle test step that needs to be tested when the device under test is tested is set.

[0038] Optionally, the system may also include: during the automated testing process, when the pitch angle of the device under test remains unchanged, the azimuth angle keeps changing according to the azimuth angle test step to test whether the device under test is correct at each operating frequency point; after the azimuth angle test is completed, the azimuth angle of the device under test remains unchanged, and the pitch angle keeps changing according to the pitch angle test step to test whether the device under test is correct at each operating frequency point.

[0039] In this embodiment, during the automated test, the pitch angle of the device under test is kept constant, and the signal source (2) outputs a working signal according to the frequency and power set in the signal source setting table. When the working signal is constantly changing according to the frequency step, the servo turntable (4) adjusts the device under test to keep changing according to the azimuth angle test step, and tests whether the device under test is correct at each working frequency point. After the azimuth angle test is completed, the azimuth angle of the device under test is kept constant, and the signal source (2) outputs a working signal according to the frequency and power set in the signal source setting table. When the working signal is constantly changing according to the frequency step, the servo turntable (4) adjusts the device under test to keep changing according to the pitch angle test step, and tests whether the device under test is correct at each working frequency point.

[0040] Optionally, the system may also include: during the automated test process, the test results of any channel of the device under test at each frequency point are saved in the central control machine (6), and the central control machine (6) generates a test report based on the test results, wherein the test results include test success and test error.

[0041] Optionally, the system may further include: during the automated test, when any channel test error occurs at any frequency point at any elevation angle or any azimuth angle of the device under test, determining that the device under test has a test error.

[0042] In this embodiment, during the automated test, if any channel of the device under test fails to be tested at any frequency point at any elevation angle or any azimuth angle, then the device under test fails to be tested.

[0043] Optionally, the system may further include: during the automated test, when any channel of the device under test at each frequency point at each pitch angle or each azimuth angle is tested correctly, it is determined that the device under test is tested correctly.

[0044] During the automated test, if any channel of the device under test is tested correctly at each frequency point at each pitch angle or each azimuth angle, then the device under test is tested correctly.

[0045] According to an embodiment of the present invention, a workflow diagram of an automatic test system for a multi-beam direction finding front end is provided. Figure 2 FIG. 1 is a flowchart of an automatic test system for a multi-beam direction finding front end according to an embodiment of the present invention. Figure 2 As shown, Figure 2 Contains a to s steps.

[0046] a. Signal source (2) connection and control function, the central control machine (6) is connected to the signal source (2) through the network switch (5), so that the signal source (2) can send signals according to the setting table.

[0047] b. Servo turntable (4) connection and control function, the central control machine (6) is connected to the servo turntable (4) through the network switch (5) to achieve automatic conversion of azimuth and pitch angles.

[0048] c. The multi-channel video detection board (7) is connected to the message receiving device, and the central control machine (6) is connected to the servo turntable (4) and the multi-channel video detection board (7) through the network switch (5) to realize the reading of multi-channel video data.

[0049] d. Select the signal source (2) frequency power call file, and select the signal source (2) radiation power setting parameters in the far-field environment of the current test.

[0050] e. Select the save address for the test data and test report.

[0051] f. Set the detection frequency range and frequency step of the DUT, and set the working frequency points that need to be tested for the DUT during the test.

[0052] g. Set the azimuth test range and test step of the DUT, and set the azimuth angle test step that needs to be tested for the DUT during the test.

[0053] h. Set the pitch test range and test step of the DUT, and set the pitch azimuth angle test step that needs to be tested for the DUT during the test.

[0054] i. Set the number of test channels for the DUT and the video channels that need to be read during the test.

[0055] j. The servo turntable (4) moves to the starting points of pitch and azimuth, starts testing, and adjusts the starting test angle of the test piece.

[0056] k. The signal source (2) transmits the starting frequency power, the system receives the corresponding channel data of the multi-channel video detection board (7), and the radiation data of the first working frequency point is read by the system.

[0057] 1. The signal source (2) changes to the next frequency and the system is tested.

[0058] m. Repeat the previous step to complete the remaining frequency point tests and complete the test of all frequency point data at this elevation angle and this azimuth angle.

[0059] n. The pitch remains unchanged, and the servo turntable (4) moves to the next azimuth angle, and repeats k to m to complete the azimuth angle test.

[0060] o. Repeat the previous step to complete the remaining azimuth angle test under the current pitch condition and complete the amplitude test under the current pitch angle.

[0061] p. The servo turntable (4) moves to the next pitch angle and repeats k to o to complete the pitch angle test.

[0062] q. Repeat the previous step to complete the remaining pitch angle tests and complete the amplitude tests for all angle requirements of the DUT.

[0063] r. According to the channel values ​​at the same pitch angle, the maximum value of the corresponding frequency point is selected as the channel axial gain. When the corresponding antenna axis is facing the transmitting antenna, the maximum video data is generated. Therefore, the maximum value after screening the full radiation is used as the channel axial gain value.

[0064] s. Calculate the maximum and minimum gain at each pitch angle based on the axial gain, and calculate the channel consistency.

[0065] According to an embodiment of the present invention, a schematic diagram of an automatic test software operation interface effect for a multi-beam direction finding front end is provided. Figure 3 FIG. 1 is a schematic diagram of an automatic test software operation interface for a multi-beam direction finding front end according to an embodiment of the present invention. Figure 3 As shown by Figure 3 It can be seen that Figure 3 It includes connection settings (i.e. communication connection settings), calibration data path (signal source parameter settings), test data storage and test item settings.

[0066] In the embodiment of the present invention, the automated test software (1) is used to control the signal source (2) to output a working signal according to the frequency and power set in the signal source setting table. When the working signal is at a first working frequency point, the servo turntable (4) is controlled to adjust the device under test to an initial azimuth angle and an initial pitch angle. The target angle of the device under test sent by the multi-channel video detection board (7) and the initial angle sent by the servo turntable (4) are received. The initial angle and the target angle are compared to obtain an angle difference. When the angle difference is less than or equal to the preset angle difference, it is determined that the device under test is at the first frequency point. Any channel test of the point is correct; the signal source (2) is used to receive the signal source setting table sent by the central control machine (6), and output the working signal to the horn antenna (3) according to the frequency and power set in the signal source setting table; the horn antenna (3) is used to receive the working signal output by the signal source (2), and radiate the working signal to the servo turntable (4); the servo turntable (4) is used to receive the working signal radiated by the horn antenna (3), when the initial pitch angle remains unchanged, the initial azimuth angle is rotated step by step to the initial angle according to the azimuth angle test, and based on the initial angle, the measured Any channel of the device corresponds to the signal source (2), and sends the initial angle to the central control machine (6) through the network switch (5); the device under test is used to obtain the signal value of each channel when each channel receives the signal source, and send the signal value of each channel to the multi-channel video detection board (7); the multi-channel video detection board (7) is used to calculate the signal value of each channel to obtain the target angle of the device under test, and send the target angle to the central control machine (6) through the network switch (5), thereby solving the technical problem that when the N-beam direction finding equipment is currently tested in azimuth and frequency band, the traditional manual channel by channel test leads to low test sensitivity, heavy workload and long time, and achieves the purpose of using multi-channel video detection for testing, completing the video of each channel of the device under test more quickly, and detecting the performance of the device under test from any angle and any frequency point according to the requirements of the specification of the device under test. The automatic test software can complete the calculation of indicators such as sensitivity, dynamic range and amplitude consistency of the device under test by classifying, processing and calculating the tested video data, and the technical effect of intuitively reflecting the channel consistency between multiple devices under test can be achieved through this device.

[0067] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0068] In the above-mentioned embodiments of the present invention, the descriptions of the various embodiments are respectively weighted, and for the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0069] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0070] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0071] In addition, each functional unit in each embodiment of the present invention may be integrated into a first processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0072] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An automatic test system for a multi-beam direction finding front end, characterized in that: include: Automated testing software (1), a signal source (2), a horn antenna (3), a servo turntable (4), a network switch (5), a central control machine (6) and a multi-channel video detection board (7), wherein a device under test is fixed on the servo turntable (4), the automated testing software (1) is loaded in the central control machine (6), the horn antenna (3) transmits the output working signal of the signal source (2) to the servo turntable (4), the signal source (2), the servo turntable (4) and the multi-channel video detection board (7) are respectively connected to the network switch (5), and the network switch (5) is connected to the central control machine (6); The automated test software (1) is used to control the signal source (2) to output a working signal according to the frequency and power set in the signal source setting table, and when the working signal is at a first working frequency point, control the servo turntable (4) to adjust the device under test to an initial azimuth angle and an initial pitch angle, receive a target angle of the device under test sent by a multi-channel video detection board (7) and an initial angle sent by the servo turntable (4), and determine whether any channel test of the device under test at the first frequency point is correct based on the initial angle and the target angle; A signal source (2) is used to receive a signal source setting table sent by a central control machine (6), and output a working signal to a horn antenna (3) according to the frequency and power set in the signal source setting table; A horn antenna (3) is used to receive a working signal output by the signal source (2) and radiate the working signal to the servo turntable (4); The servo turntable (4) is used to receive the working signal radiated by the horn antenna (3), and when the initial pitch angle remains unchanged, the initial azimuth angle is rotated stepwise to the initial angle according to the azimuth angle test, and based on the initial angle, any channel of the device under test is controlled to correspond to the signal source (2), and the initial angle is sent to the central control machine (6) through the network switch (5); The device under test is used to obtain the signal value of each channel when each channel receives a signal source, and send the signal value of each channel to the multi-channel video detection board (7); The multi-channel video detection board (7) is used to calculate the signal value of each channel to obtain the target angle of the tested object, and send the target angle to the central control machine (6) through the network switch (5).

2. An automatic test system for a multi-beam direction finding front end according to claim 1, characterized in that: Based on the initial angle and the target angle, determine whether any channel test of the device under test at the first frequency point is correct, including: Compare the initial angle and the target angle to obtain the angle difference. When the angle difference is less than or equal to the preset angle difference, it is determined that any channel of the device under test at the first frequency point is tested correctly. When the angle difference is greater than the preset angle difference, it is determined that a test error occurs in any channel of the device under test at the first frequency point.

3. The automatic test system for a multi-beam direction finding front end according to claim 1, characterized in that: Also includes: Before conducting automated testing, set the test frequency range and frequency step of the DUT, and set the working frequency points that the DUT needs to test. Set the azimuth test range and test step of the DUT, and set the azimuth angle test step that needs to be tested for the DUT in this test; Set the pitch test range and test step of the DUT, and set the pitch angle test step that needs to be tested for the DUT during the test.

4. The automatic test system for a multi-beam direction finding front end according to claim 1, characterized in that: Also includes: During the automated test, when the pitch angle of the DUT remains unchanged, the azimuth angle keeps changing according to the azimuth angle test step to test whether the DUT is correct at each operating frequency point. When the azimuth angle test is completed, the azimuth angle of the DUT remains unchanged, and the pitch angle keeps changing according to the pitch angle test step to test whether the DUT is correct at each operating frequency point.

5. The automatic test system for a multi-beam direction finding front end according to claim 1, characterized in that: Also includes: During the automated test, the test results of any channel of the device under test at each frequency point are saved in the central control machine (6), and the central control machine (6) generates a test report based on the test results, wherein the test results include test success and test error.

6. An automatic test system for a multi-beam direction finding front end according to any one of claims 1 to 5, characterized in that: Also includes: During the automated test, when any channel of the device under test fails at any frequency point at any elevation angle or any azimuth angle, it is determined that the device under test fails.

7. An automatic test system for a multi-beam direction finding front end according to any one of claims 1 to 5, characterized in that: Also includes: During the automated test, when any channel of the device under test at each frequency point at each pitch angle or each azimuth angle is tested correctly, it is determined that the device under test is tested correctly.

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