Phased array radar burn-in test method and test system

Abstract

The application discloses a kind of phased array radar aging test method and test system, the test method includes transmitting and receiving channel aging test, transmitting channel aging test includes under the control of first test instruction, radar host computer outputs power to load, and whether phased array radar is in saturated power band charging aging state according to output power, if not, then increase first test instruction;Receiving channel aging test includes under the control of second test instruction, radar host computer outputs first mixed signal to power division attenuation module;After power division attenuation module carries out power division and attenuation processing to first mixed signal, upload to host computer by signal processing system.The application improves test efficiency, reduces equipment cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of radar testing, and particularly relates to a phased array radar aging test method and a test system. BACKGROUND

[0002] Aging test is a kind of reliability test widely used in product testing at present, which accelerates the early failure mechanism. The purpose is to test the running condition and performance change of the product under high temperature by simulating the high temperature environment in the actual use process, so as to guide the manufacturer to evaluate the performance and reliability of the product.

[0003] The aging of the phased array radar is usually normal temperature outdoor aging or normal temperature indoor aging. The normal temperature indoor and outdoor aging needs a relatively long time to achieve the effect, greatly improves the test time and reduces the test efficiency. At the same time, the normal temperature indoor and outdoor aging generally needs to rely on instruments (such as network analyzers), which increases the equipment cost. SUMMARY

[0004] The purpose of the application is to provide a phased array radar aging test method and a test system, so as to solve the problems of long test time, low test efficiency of the traditional aging method, and the need for instruments, which leads to high test cost.

[0005] The application solves the above technical problems through the following technical scheme: a phased array radar aging test method, the phased array radar is placed in a high temperature aging room and includes a signal processing system, a radar host, a first polarization switch assembly and a power division and attenuation module. The radar host is connected with the signal processing system, the first polarization switch assembly and the power division and attenuation module. The first polarization switch assembly is connected with the power division and attenuation module and a load. The test method includes transmit channel aging test and receive channel aging test. The transmit channel aging test includes:

[0006] Under the first test instruction issued by the host computer, the radar host outputs power to the load. The output power is fed back to the host computer through the signal processing system. The host computer determines whether the phased array radar is in the saturated power live aging state according to the output power. If not, the first test instruction is increased.

[0007] The receive channel aging test includes:

[0008] Under the second test instruction issued by the host computer, the radar host outputs the first mixed frequency signal to the power division and attenuation module. After the power division and attenuation module performs power division and attenuation processing on the first mixed frequency signal, the first mixed frequency signal is uploaded to the host computer through the first polarization switch assembly, the radar host and the signal processing system.

[0009] Further, under the first test instruction issued by the host computer, the radar host outputs power to the load, specifically including:

[0010] In the radar host, the wave control module generates a first radio frequency signal under the first test instruction, the intermediate frequency transmitting module mixes the first radio frequency signal and a second radio frequency signal output by the frequency synthesizer module to obtain a second mixed frequency signal; the power division module transmits the second mixed frequency signal to the TR assembly after power division; and the TR assembly outputs power to the load through the first polarization switch assembly.

[0011] Further, under the second test instruction issued by the host computer, the radar host outputs the first mixed frequency signal to the power division and attenuation module, specifically including:

[0012] In the radar host, the wave control module generates a third radio frequency signal under the second test instruction, and the intermediate frequency transmitting module mixes the third radio frequency signal and a second radio frequency signal output by the frequency synthesizer module to obtain a first mixed frequency signal.

[0013] Further, after the host computer issues the first test instruction to the phased array radar, the signal processing system controls the phased array radar to stop debugging under the first test instruction, so that the phased array radar is in a non-emission state, then opens the horizontal polarization channel of the first polarization switch assembly, controls the phased array radar to start debugging, and the radar host outputs power to the load.

[0014] After the host computer issues the second test instruction to the phased array radar, the signal processing system controls the phased array radar to stop debugging under the second test instruction, so that the phased array radar is in a non-emission state, then opens the vertical polarization channel of the first polarization switch assembly, receives the receiving calibration amplitude sent by the radar host, and uploads it to the host computer.

[0015] Further, during the emission channel aging test process, the host computer also receives the state data uploaded by the signal processing system, and judges whether the phased array radar is in a normal state according to the state data; if not, the host computer issues a stop test instruction to the phased array radar, records the tested time length, and sends an abnormal prompt information.

[0016] Further, the test method further includes a cyclic aging test of the emission channel and the receiving channel, specifically including:

[0017] Step S31: starting the emission channel aging test and counting the emission channel aging test time;

[0018] Step S32: judging whether the emission channel aging test time reaches a first set test time; if yes, proceeding to step S33; if not, continuing the test and proceeding to step S32;

[0019] Step S33: starting the receiving channel aging test and counting the receiving channel aging test time.

[0020] Step S34: judging whether the receiving channel aging test time reaches the second set test time; if yes, turning to step S35; if no, continuing the test and turning to step S34;

[0021] Step S35: adding 1 to the cycle number, judging whether the cycle number reaches the preset maximum cycle number; if yes, ending the test; if no, turning to step S31; wherein the initial value of the cycle number is 0.

[0022] Further, the test method further comprises the cycle aging test of the transmitting channel and the receiving channel, specifically comprising:

[0023] Step S41: starting the receiving channel aging test and counting the receiving channel aging test time;

[0024] Step S42: judging whether the receiving channel aging test time reaches the second set test time; if yes, turning to step S43; if no, continuing the test and turning to step S42;

[0025] Step S43: starting the transmitting channel aging test and counting the transmitting channel aging test time;

[0026] Step S44: judging whether the transmitting channel aging test time reaches the first set test time; if yes, turning to step S45; if no, continuing the test and turning to step S44;

[0027] Step S45: adding 1 to the cycle number, judging whether the cycle number reaches the preset maximum cycle number; if yes, ending the test; if no, turning to step S41; wherein the initial value of the cycle number is 0.

[0028] Based on the same concept, the application further provides a phased array radar aging test system, comprising a host computer, a load and a high-temperature aging room, the phased array radar is placed in the high-temperature aging room and comprises a signal processing system, a radar host, a first polarization switch assembly and a power division and attenuation module, the radar host is connected with the signal processing system, the first polarization switch assembly and the power division and attenuation module, the first polarization switch assembly is connected with the power division and attenuation module and the load;

[0029] The host computer is used for issuing a first test instruction or a second test instruction to the phased array radar; judging whether the phased array radar is in a saturated power live aging state according to the output power, and increasing the first test instruction when the phased array radar is in a non-saturated power live aging state;

[0030] The radar host outputs power to the load under the first test instruction and outputs the first mixed signal to the power division attenuation module under the second test instruction; the first mixed signal fed back by the power division attenuation module is processed to obtain a receiving calibration amplitude; and the output power and the receiving calibration amplitude are sent to the host computer through the signal processing system.

[0031] The power division attenuation module is used for power division and attenuation processing of the first mixed signal and then sends the first mixed signal to the radar host.

[0032] Further, the radar host comprises a wave control module, a frequency synthesis module, an intermediate frequency transmitting module, a second polarization switch assembly, a power division module, a TR assembly and an AD module; the wave control module and the AD module are connected with the signal processing system respectively; the intermediate frequency transmitting module is connected with the frequency synthesis module, the wave control module, the power division module and the second polarization switch assembly; the frequency synthesis module is connected with the power division module; the second polarization switch assembly is connected with the power division attenuation module; and the TR assembly is connected with the power division module, the AD module and the first polarization switch assembly.

[0033] Further, the power division attenuation module comprises one one-to-four power divider, four attenuators and four one-to-sixteen power dividers; the input end of the one-to-four power divider is connected with the radar host; the four output ends of the one-to-four power divider are connected with the input ends of the four attenuators respectively; each attenuator corresponds to one one-to-sixteen power divider; and the output end of each attenuator is connected with the first polarization switch assembly through the corresponding one-to-sixteen power divider.

[0034] Alternatively, the power division attenuation module comprises one one-to-sixty-four power divider and sixty-four attenuators; the input end of the one-to-sixty-four power divider is connected with the radar host; the sixty-four output ends of the one-to-sixty-four power divider are connected with the input ends of the sixty-four attenuators respectively; and the output ends of the sixty-four attenuators are connected with the first polarization switch assembly respectively.

[0035] Compared with the prior art, the present application has the following advantages:

[0036] On the basis that the phased array radar is placed in a high-temperature aging room, the signal size of the first test instruction is adjusted by monitoring the output power of the TR assembly, so that the phased array radar is in a saturated power live aging state during the transmission channel aging test, the performance verification such as power stability and thermal management capability is realized, potential defects can be quickly exposed, the reliability verification efficiency is improved, and the test efficiency is improved; the aging test of the present application only increases the host computer, without the aid of network analyzers and other equipment, thereby reducing the equipment cost. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only one embodiment of the present application, and other drawings can also be obtained by those skilled in the art without creative effort based on these drawings.

[0038] Figure 1 is a structure block diagram of the phased array radar aging test system in the embodiment of the present application;

[0039] Figure 2 is a flow chart of the transmit channel aging test in the embodiment of the present application;

[0040] Figure 3 is a signal link diagram of the transmit channel aging test in the embodiment of the present application;

[0041] Figure 4 is a flow chart of the receive channel aging test in the embodiment of the present application;

[0042] Figure 5 is a signal link diagram of the receive channel aging test in the embodiment of the present application;

[0043] Figure 6 is a flow chart of the first embodiment of the cyclic aging test of the transmit channel and the receive channel in the embodiment of the present application;

[0044] Figure 7 is a flow chart of the second embodiment of the cyclic aging test of the transmit channel and the receive channel in the embodiment of the present application;

[0045] Figure 8 is a flow chart of the abnormality monitoring in the transmit channel aging test in the embodiment of the present application;

[0046] Figure 9 is a flow chart of the abnormality monitoring in the transmit channel aging test in the embodiment of the present application;

[0047] Figure 10 is a structure schematic diagram of the radar host computer in the embodiment of the present application;

[0048] Figure 11 is a structure block diagram of the power division and attenuation module in the first embodiment of the present application;

[0049] Figure 12 is a structure block diagram of the power division and attenuation module in the second embodiment of the present application. DETAILED DESCRIPTION

[0050] The technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0051] The technical solutions of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.

[0052] Embodiment one

[0053] The conventional radar burn-in test is usually outdoor burn-in at room temperature or indoor burn-in at room temperature. This mode needs a long time to achieve the effect, resulting in long test time and low test efficiency. At the same time, the conventional radar burn-in needs to rely on instruments, such as network analyzers, resulting in increased test equipment cost.

[0054] To solve the above technical problems, the phased array radar burn-in test method provided by the present application places the phased array radar in a high-temperature aging room, reduces the test time, and improves the test efficiency. At the same time, no instruments are needed, reducing the test cost. As shown in Figure 1 The phased array radar includes a signal processing system, a radar host, a first polarization switch assembly, and a power division and attenuation module. The radar host is connected with the signal processing system, the first polarization switch assembly, and the power division and attenuation module. The first polarization switch assembly is connected with the power division and attenuation module and a load. The signal processing system communicates with a host computer. In this embodiment, the temperature of the high-temperature aging room is set to 60℃.

[0055] The phased array radar burn-in test method of the present embodiment includes transmit channel burn-in test, receive channel burn-in test, and cyclic burn-in test of the transmit channel and the receive channel. As shown in Figure 2 The transmit channel burn-in test includes:

[0056] Step S11: The host computer issues a first test instruction to the phased array radar.

[0057] Step S12: Under the control of the first test instruction, the radar host outputs power to the load, and the output power is fed back to the host computer through the radar host and the signal processing system.

[0058] Step S13: The host computer determines whether the phased array radar is in a saturated power on-line aging state according to the output power. If not, the first test instruction is increased, and step S12 is entered.

[0059] In the specific embodiments of the present application, as Figure 3As shown, under the control of the first test instruction, the radar host outputs power to the load, specifically including:

[0060] The host computer issues the first test instruction to the signal processing system, and the signal processing system sends the first test instruction to the wave control module in the radar host;

[0061] In the radar host, the wave control module generates a first radio frequency signal under the first test instruction, and the intermediate frequency transmitting module mixes the first radio frequency signal and the second radio frequency signal output by the frequency synthesizer module to obtain a second mixed frequency signal;

[0062] The power division module transmits the second mixed frequency signal to the TR assembly after power division, and the TR assembly outputs power to the load through the horizontal polarization channel of the first polarization switch assembly, and the load absorbs the power emitted by the TR assembly.

[0063] The front-stage driving power amplifier of the TR assembly is built-in with a detection circuit, which monitors the voltage of the TR assembly and converts the voltage into power data (as shown in Table 1), and then sends the power data to the wave control module, which is uploaded to the host computer by the signal processing system. The host computer compares the power data with the power threshold value, and if the power data is less than the power threshold value, it indicates that the phased array radar has not reached the saturated power charging aging state, and the first test instruction is increased to increase the output power of the TR assembly. In this embodiment, the power threshold value is set to 39dBm.

[0064] The detection circuit has the advantage of high-speed response, and its response speed is usually in the nanosecond to microsecond level, which can capture the voltage of the TR assembly in real time and realize the rapid control of the output power of the TR assembly; at the same time, the detection circuit is usually composed of semiconductor diodes and passive elements, which belongs to solid-state devices, so it has very high reliability and service life.

[0065] Table 1 Statistics table of output power of TR assembly corresponding to voltage

[0066]

[0067] As shown, Figure 4 The receive channel aging test includes:

[0068] Step S21: The host computer issues a second test instruction to the phased array radar;

[0069] Step S22: Under the control of the second test instruction, the radar host outputs a first mixed frequency signal to the power division and attenuation module;

[0070] Step S23: After the power division and attenuation module performs power division and attenuation processing on the first mixed frequency signal, it is uploaded to the host computer through the first polarization switch assembly, the radar host and the signal processing system.

[0071] In the specific embodiment of the present application, as shown in Figure 5 The radar host outputs a first mixed signal to the power division and attenuation module under the control of the second test instruction, specifically including:

[0072] The host computer issues the second test instruction to the signal processing system, and the signal processing system sends the second test instruction to the wave control module in the radar host;

[0073] In the radar host, the wave control module generates a third radio frequency signal under the second test instruction, and the intermediate frequency transmitting module mixes the third radio frequency signal and the second radio frequency signal output by the frequency synthesizer module to obtain a first mixed signal;

[0074] The first mixed signal is transmitted to the power division and attenuation module through the second polarization switch assembly, and after power division and attenuation processing, it is transmitted to the TR assembly through the vertical polarization channel of the first polarization switch assembly. The TR assembly mixes the signal transmitted by the first polarization switch assembly with the signal transmitted by the power division module (i.e. the frequency synthesizer module outputs a fourth radio frequency signal to the power division module, and the power division module transmits the fourth radio frequency signal to the TR assembly after power division), and then transmits it to the AD module. The AD module performs analog-to-digital conversion on the signal transmitted by the TR assembly to obtain a receive calibration amplitude. The receive calibration amplitude is uploaded to the host computer by the signal processing system. The host computer monitors the receive calibration amplitude and saves the data. The receive channel aging test of the present application adopts an in-machine simulation mode.

[0075] As shown in Figure 6 In one specific embodiment of the present application, the cyclic aging test of the transmit channel and the receive channel includes:

[0076] Step S31: Start the transmit channel aging test and count the transmit channel aging test time;

[0077] Step S32: Determine whether the transmit channel aging test time reaches a first set test time;

[0078] If yes, go to step S33;

[0079] If no, continue the transmit channel aging test and count the transmit channel aging test time, and go to step S32;

[0080] Step S33: Start the receive channel aging test and count the receive channel aging test time;

[0081] Step S34: Determine whether the receive channel aging test time reaches a second set test time;

[0082] If yes, go to step S35;

[0083] If no, the receiving channel aging test is continued and the receiving channel aging test time is counted, and the step S34 is entered;

[0084] Step S35: the cycle number is added by 1, and it is judged whether the cycle number reaches the preset maximum cycle number, if yes, the test is ended; if no, the step S31 is entered. The initial value of the cycle number is 0.

[0085] As shown in the figure, Figure 7 In another specific embodiment of the present application, the cycle aging test of the transmitting channel and the receiving channel specifically includes:

[0086] Step S41: the receiving channel aging test is started, and the receiving channel aging test time is counted;

[0087] Step S42: it is judged whether the receiving channel aging test time reaches the second set test time;

[0088] If yes, the step S43 is entered;

[0089] If no, the receiving channel aging test is continued and the receiving channel aging test time is counted, and the step S42 is entered;

[0090] Step S43: the transmitting channel aging test is started, and the transmitting channel aging test time is counted;

[0091] Step S44: it is judged whether the transmitting channel aging test time reaches the first set test time;

[0092] If yes, the step S45 is entered;

[0093] If no, the transmitting channel aging test is continued and the transmitting channel aging test time is counted, and the step S44 is entered;

[0094] Step S45: the cycle number is added by 1, and it is judged whether the cycle number reaches the preset maximum cycle number, if yes, the test is ended; if no, the step S41 is entered. The initial value of the cycle number is 0.

[0095] In the embodiment, the first set test time is 4 hours, and the second set test time is 1 hour. The first set test time, the second set test time and the maximum cycle number can be set according to actual test requirements.

[0096] The one-key transmitting channel aging test, the one-key receiving channel aging test or the cycle aging test of the transmitting channel and the receiving channel can be realized by the master control computer, and the operation process of the phased array radar aging test is greatly reduced.

[0097] The burn-in time of the product is generally not more than 20% of the product life, and the power-on time in the stress screening test is not counted into the burn-in time. The selection of the burn-in time is related to the temperature stress and the working environment of the product. According to the standard document QJ 908A-2012 Electronic Product Burn-in Test Method, or the Arrhenius model, the acceleration factor at high temperature can be calculated, and then the high-temperature burn-in time is obtained.

[0098] For a phased array radar, the environmental adaptability temperature requirement is -40℃~60℃, and aging is performed at the highest temperature of 60℃. According to the approximate formula for calculating the acceleration factor, the burn-in time at the stress temperature is 17h. According to the quality of the product, the burn-in time of the phased array radar can be selected as 48h.

[0099] During the burn-in test, the state of the phased array radar can also be monitored, and the test is automatically stopped in a fault state to ensure the safety of the burn-in test. As shown in Figure 8 After the host computer issues the first test instruction to the phased array radar, the signal processing system controls the phased array radar to stop debugging under the control of the first test instruction, so that the phased array radar is in a non-emission state, then opens the horizontal polarization channel of the first polarization switch assembly, and then controls the phased array radar to start debugging, and the radar host outputs power to the load.

[0100] During the emission channel burn-in test, the phased array radar is first controlled to stop debugging, and then the horizontal polarization channel of the first polarization switch assembly is opened, which provides a stable electrical environment for the first polarization switch assembly, avoids signal conflicts or hardware damage, and also avoids directly switching polarization without stopping debugging, which may cause parameter drift and affect the accuracy of the aging test. Through the strict timing of “stop-switch polarization-restart”, the initial state of each emission channel test is ensured to be consistent, which facilitates the comparison of aging performance under different polarization modes, and ensures the safety of radar hardware and the reliability of test data during polarization switching.

[0101] As shown in Figure 8 During the emission channel burn-in test, the host computer also receives the state data uploaded by the signal processing system, and judges whether the phased array radar is in a normal state according to the state data. If not, the host computer issues a stop test instruction to the phased array radar, records the tested time length, and sends an abnormal prompt information. According to the abnormal prompt information, manual troubleshooting and processing can be performed, and after the abnormality is eliminated, the emission channel burn-in test is manually resumed.

[0102] As shown in Figure 9As shown, after the main control computer sends the second test command to the phased array radar, the signal processing system, under the control of the second test command, first controls the phased array radar to stop debugging and put it in a non-transmitting state. Then, it opens the vertical polarization channel of the first polarization switch component, receives the reception calibration amplitude sent by the radar host, and uploads it to the main control computer. In this embodiment, the main control computer acquires the reception calibration amplitude every 5 minutes.

[0103] During the aging test of the receiving channel, the debugging is stopped first, and then the vertical polarization channel of the first polarization switch component is turned on. This prevents the radar from accidentally transmitting signals during polarization switching, avoids high-power radio frequency energy reflection or standing wave damage to the receiving channel, and also avoids cross-polarization interference, ensuring the accuracy and reliability of the aging test of the receiving channel.

[0104] like Figure 9 As shown, during the aging test of the receiving channel, the test can be manually paused and then manually resumed.

[0105] Example 2

[0106] like Figure 1 As shown, the phased array radar aging test system provided in this embodiment of the invention includes a main control computer, a load, and a high-temperature aging chamber. The phased array radar is placed in the high-temperature aging chamber and includes a signal processing system, a radar host, a first polarization switch assembly, and a power attenuation module. The radar host is connected to the signal processing system, the first polarization switch assembly, and the power attenuation module. The first polarization switch assembly is connected to the power attenuation module and the load. The signal processing system communicates with the main control computer.

[0107] The main control computer is used to issue the first test command or the second test command to the phased array radar; receive the output power and the received calibration amplitude uploaded by the signal processing system, and determine whether the phased array radar is in a saturated power aging state based on the output power. When the phased array radar is in a non-saturated power aging state, the first test command is increased.

[0108] The signal processing system is used to send the first test command or the second test command to the radar host, receive the output power fed back by the radar host, and upload the output power to the main control computer; it also receives the reception calibration amplitude fed back by the radar host and uploads it to the main control computer.

[0109] The radar host is used to output power to the load under the control of the first test command and feed the output power back to the signal processing system; under the control of the second test command, it outputs the first mixing signal to the power division attenuation module; it receives the first mixing signal after power division and attenuation processing fed back by the power division attenuation module, processes the first mixing signal after power division and attenuation processing to obtain the receiving calibration amplitude, and sends the receiving calibration amplitude to the signal processing system.

[0110] a power division and attenuation module, configured to perform power division and attenuation on the first mixed frequency signal and send the first mixed frequency signal after the power division and attenuation to the radar host.

[0111] In the specific embodiments of the present application, as shown in Figure 10 the radar host comprises a wave control module, a frequency synthesis module, an intermediate frequency transmitting module, a second polarization switch assembly, a power division module, a TR assembly and an AD module; the wave control module and the AD module are connected with a signal processing system respectively, the intermediate frequency transmitting module is connected with the frequency synthesis module, the wave control module, the power division module and the second polarization switch assembly, the frequency synthesis module is connected with the power division module, the second polarization switch assembly is connected with the power division and attenuation module, and the TR assembly is connected with the power division module, the AD module and the first polarization switch assembly.

[0112] In the present embodiment, the TR assembly, the AD module and the first polarization switch assembly are all 64-way. Since the TR assembly comprises 16 TR modules and each TR module has 4 TR channels, the power division module is a 1-to-16 power divider.

[0113] The power division and attenuation module is configured to perform power division and attenuation on the first mixed frequency signal, and there are two specific embodiments: in the first embodiment, as shown in Figure 11 the power division and attenuation module comprises a 1-to-4 power divider, 4 attenuators and 4 1-to-16 power dividers, the input end of the 1-to-4 power divider is connected with the radar host, the 4 output ends of the 1-to-4 power divider are connected with the input ends of the 4 attenuators respectively, each attenuator corresponds to a 1-to-16 power divider, and the output end of each attenuator is connected with the first polarization switch assembly through the corresponding 1-to-16 power divider.

[0114] In the second embodiment, as shown in Figure 12 the power division and attenuation module comprises a 1-to-64 power divider and 64 attenuators, the input end of the 1-to-64 power divider is connected with the radar host, the 64 output ends of the 1-to-64 power divider are connected with the input ends of the 64 attenuators respectively, and the output ends of the 64 attenuators are connected with the first polarization switch assembly respectively.

[0115] The first embodiment only needs 4 attenuators, thereby saving attenuators, and therefore, the power division and attenuation module of the present application is preferably the first embodiment.

[0116] In some specific embodiments of the present application, the phased array radar aging test system can combine the features of the phased array radar aging test method in Embodiment One of the present application, and vice versa.

[0117] The above merely provides the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or modifications within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A method for aging test of phased array radar, characterized in that, The phased array radar is placed in a high-temperature aging chamber and includes a signal processing system, a radar main unit, a first polarization switch assembly, and a power attenuation module. The radar main unit is connected to the signal processing system, the first polarization switch assembly, and the power attenuation module. The first polarization switch assembly is connected to the power attenuation module and a load. The testing method includes a transmit channel aging test and a receive channel aging test. The transmit channel aging test includes: Under the first test command issued by the main control computer, the signal processing system first controls the phased array radar to stop debugging and put it in a non-transmitting state. Then, it opens the horizontal polarization channel of the first polarization switch component and controls the phased array radar to start debugging. The radar host outputs power to the load and feeds back the output power to the main control computer through the signal processing system. The main control computer determines whether the phased array radar is in a saturated power aging state based on the output power. If not, it increases the first test command. The receiver channel aging test includes: Under the second test command issued by the main control computer, the radar host outputs the first mixing signal to the power division attenuation module; after the power division attenuation module performs power division and attenuation processing on the first mixing signal, it is uploaded to the main control computer after passing through the first polarization switch component, the radar host and the signal processing system. Under the second test command, the signal processing system first controls the phased array radar to stop debugging and put it in a non-transmitting state. Then, it opens the vertical polarization channel of the first polarization switch component, receives the received calibration amplitude sent by the radar host, and uploads it to the main control computer.

2. The aging test method for phased array radar according to claim 1, characterized in that, Upon receiving the first test command from the main control computer, the radar host outputs power to the load, specifically including: Inside the radar host, the beam control module generates a first radio frequency signal under the first test command. The intermediate frequency transmission module mixes the first radio frequency signal and the second radio frequency signal output by the frequency synthesis module to obtain a second mixed signal. The power divider module divides the second mixed signal and transmits it to the TR component. The TR component outputs power to the load through the first polarization switch component.

3. The aging test method for phased array radar according to claim 1, characterized in that, Under the second test command issued by the main control computer, the radar host outputs the first mixing signal to the power attenuation module, specifically including: Inside the radar host, the beam control module generates a third radio frequency signal under the second test command, and the intermediate frequency transmission module mixes the third radio frequency signal with the second radio frequency signal output by the frequency synthesis module to obtain a first mixed signal.

4. The aging test method for phased array radar according to claim 1, characterized in that, During the aging test of the transmission channel, the main control computer also receives status data uploaded by the signal processing system and determines whether the phased array radar is in normal condition based on the status data. If not, the main control computer issues a stop test command to the phased array radar, records the test duration, and issues an abnormality prompt message.

5. The aging test method for phased array radar according to any one of claims 1 to 4, characterized in that, The test method also includes cyclic aging tests on the transmit and receive channels, specifically including: Step S31: Start the launch channel aging test and record the launch channel aging test time; Step S32: Determine whether the aging test time of the launch channel has reached the first set test time; if yes, proceed to step S33; if no, continue testing and proceed to step S32. Step S33: Start the receiving channel aging test and record the receiving channel aging test time; Step S34: Determine whether the aging test time of the receiving channel has reached the second set test time; if yes, proceed to step S35; if no, continue testing and proceed to step S34. Step S35: Increment the loop count by 1, and determine whether the loop count has reached the preset maximum loop count. If yes, end the test; otherwise, proceed to step S31. The initial value of the loop count is 0.

6. The aging test method for phased array radar according to any one of claims 1 to 4, characterized in that, The test method also includes cyclic aging tests on the transmit and receive channels, specifically including: Step S41: Start the receiving channel aging test and record the receiving channel aging test time; Step S42: Determine whether the aging test time of the receiving channel has reached the second set test time; if yes, proceed to step S43; if no, continue testing and proceed to step S42. Step S43: Start the launch channel aging test and record the launch channel aging test time; Step S44: Determine whether the aging test time of the launch channel has reached the first set test time; if yes, proceed to step S45; if no, continue testing and proceed to step S44. Step S45: Increment the loop count by 1, and determine whether the loop count has reached the preset maximum loop count. If yes, end the test; otherwise, proceed to step S41. The initial value of the loop count is 0.

7. A phased array radar aging test system, characterized in that, The system includes a main control computer, a load, and a high-temperature aging chamber. The phased array radar is placed in the high-temperature aging chamber and includes a signal processing system, a radar host, a first polarization switch assembly, and a power attenuation module. The radar host is connected to the signal processing system, the first polarization switch assembly, and the power attenuation module. The first polarization switch assembly is connected to the power attenuation module and the load. The main control computer is used to issue the first test command or the second test command to the phased array radar; it determines whether the phased array radar is in a saturated power aging state based on the output power, and increases the first test command when the phased array radar is in a non-saturated power aging state. The signal processing system is configured to, under the first test command, first control the phased array radar to stop debugging and put it in a non-transmitting state, then open the horizontal polarization channel of the first polarization switch component, and then control the phased array radar to start debugging, receive the output power sent by the radar host, and upload it to the main control computer; and under the second test command, first control the phased array radar to stop debugging and put it in a non-transmitting state, then open the vertical polarization channel of the first polarization switch component, receive the received calibration amplitude sent by the radar host, and upload it to the main control computer. The radar host is used to output power to the load under the first test command and to output the first mixing signal to the power division attenuation module under the second test command. The first mixing signal fed back by the power division attenuation module is processed to obtain the receiving calibration amplitude; the output power and the receiving calibration amplitude are sent to the main control computer through the signal processing system. The power divider and attenuation module is used to perform power division and attenuation processing on the first mixing signal, and then send it to the radar host.

8. The phased array radar aging test system according to claim 7, characterized in that, The radar main unit includes a beam control module, a frequency synthesizer module, an intermediate frequency (IF) transmission module, a second polarization switch assembly, a power divider module, a TR assembly, and an AD module. The beam control module and AD module are respectively connected to the signal processing system. The IF transmission module is connected to the frequency synthesizer module, the beam control module, the power divider module, and the second polarization switch assembly. The frequency synthesizer module is connected to the power divider module. The second polarization switch assembly is connected to the power divider attenuation module. The TR assembly is connected to the power divider module, the AD module, and the first polarization switch assembly.

9. The phased array radar aging test system according to claim 7 or 8, characterized in that, The power attenuation module includes one 1-to-4 power divider, four attenuators, and four 1-to-16 power dividers. The input of the 1-to-4 power divider is connected to the radar host, and the four outputs of the 1-to-4 power divider are respectively connected to the inputs of the four attenuators. Each attenuator corresponds to one 1-to-16 power divider, and the output of each attenuator is connected to the first polarization switch assembly through the corresponding 1-to-16 power divider. Alternatively, the power attenuation module includes a 1-to-64 power divider and 64 attenuators. The input of the 1-to-64 power divider is connected to the radar host, the 64 outputs of the 1-to-64 power divider are respectively connected to the inputs of the 64 attenuators, and the outputs of the 64 attenuators are respectively connected to the first polarization switch assembly.

Images