CN115743593A - Embedded training airborne data link end machine detection device and test method thereof - Google Patents
Embedded training airborne data link end machine detection device and test method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of airplane airborne equipment detection instruments, in particular to an embedded type detection device for training airborne data link ends and a test method thereof, wherein the detection device comprises a cabinet; the control computer is arranged on the machine cabinet; the embedded training chain exciter is arranged on the machine cabinet; the program-controlled direct-current power supply is arranged on the machine cabinet; the power meter is arranged on the machine cabinet; a test interface; and the fixed/adjustable attenuator is arranged on the machine cabinet. According to the invention, the off-line detection of the terminal is realized by hardware resources such as embedded training chain exciter software and test control software, which are supplemented with a power meter, a direct-current power supply, an embedded training chain exciter, a control computer and the like, so that the defect that the environment on a real machine needs to be provided in the previous test is avoided, the test cost is saved, and the test efficiency is improved. Meanwhile, the quantitative test of performance indexes such as transmitting power, sensitivity and the like is realized, and an efficient test method is provided for fault location and repair of the terminal.
Description
Technical Field
The invention relates to the technical field of airplane airborne equipment detection instruments, in particular to an embedded type training airborne data link end machine detection device and a test method thereof.
Background
An embedded training airborne data link terminal (hereinafter referred to as a terminal) is important airborne equipment of a certain airplane avionics system, and mainly has the functions of realizing data information required by interactive combat training between an airplane and a ground station and realizing an air-ground networking communication function. The training platform flexibly has the functions of network access and network quit in the training task process, information is encrypted and decrypted, the function of confidential communication is achieved, the frequency band management function is achieved, and wave channels used by the aircraft to be trained are set through planning. The end machine is internally divided into four modules according to functions except for a secondary power supply, and the four modules are respectively: a transmitting unit; a receiving unit; a data processing unit; and a security module. The terminal machine is used as an important component of certain airplane airborne equipment, the failure rate is high, and the failure is mostly caused by the failure or performance reduction of electronic components on the internal circuit board plug-in unit.
The current testing method of the terminal machine comprises the following steps: the terminal is installed on an airplane, and after the terminal receives the radio frequency signal from the embedded training inspection instrument through the antenna on the airplane for space radiation to complete networking, the terminal sends service data and network registration information to the embedded training inspection instrument through a wireless channel, and the embedded training inspection instrument receives the signal and then displays the networking state of airborne members and can receive and process the service data, so that whether the terminal works normally is judged. The testing method and the embedded training inspection instrument developed according to the testing method can only meet the functional testing requirements, can not realize off-line detection of the terminal, can not quantitatively detect performance indexes such as transmitting power, sensitivity and the like of the terminal, and are not beneficial to fault positioning and repairing in the terminal.
Disclosure of Invention
In order to solve the technical problem, the invention provides an embedded detection device for an onboard data link end of a training machine and a test method thereof. The off-line detection of the terminal can be realized, the performance indexes of the terminal, such as the transmitting power, the sensitivity and the like, and the intermediate signals of each internal performance module can be quantitatively detected, and the accurate diagnosis of the fault plate of the terminal is realized.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
an embedded training airborne data chain end detection device, comprising:
a cabinet;
the control computer is arranged on the cabinet and used for setting excitation source parameters, generating output excitation signals, completing the acquisition and measurement of signals output by the tested terminal machine and acquiring and sorting test data;
the embedded training chain exciter is arranged on the machine cabinet, is in communication connection with the control computer through an LAN (local area network) interface, is used for simulating a ground terminal machine and an airborne terminal machine to realize networking and data receiving and transmitting functions, simulating network management equipment to carry out network planning, and carrying out packet loss rate and transmitted packet number statistics by matching with the control computer;
the program-controlled direct-current power supply is arranged on the machine cabinet, is in communication connection with the control computer through an LAN/RS232 interface and is used for providing a power supply for the tested terminal machine;
the power meter is arranged on the cabinet, is in communication connection with the control computer through a LAN/RS232 interface and is used for measuring the transmitting power of the tested terminal machine;
the test interface is respectively connected with the embedded training chain exciter, the program-controlled direct-current power supply, the power meter and the tested terminal machine through special test cables;
and the fixed/adjustable attenuator is arranged on the machine cabinet, is respectively connected with the test interface and the tested terminal machine through a special test cable, and is used for adjusting the signal intensity between the detection device and the tested terminal machine.
Preferably, the dedicated test cable comprises a radio frequency cable, a low frequency cable.
Preferably, the embedded training chain exciter comprises an exciter panel, a power module connected with the exciter panel, a channel module connected with the exciter panel and the power module, and a communication module connected with the exciter panel and the channel module.
Preferably, the exciter panel comprises an exciter front panel and an exciter rear panel, the exciter front panel is provided with a radio frequency interface and an exciter power switch, the radio frequency interface and the exciter power switch are connected with the test interface and the channel module, and the exciter rear panel is provided with a LAN port connected with the control computer and the communication module and an ac interface connected with an external power supply and a power module.
Preferably, the control computer internally comprises airborne data excitation software, gnd ground embedded training control software and Air airborne information processing software.
A detection method of an embedded type training airborne data link end machine detection device is applied to the embedded type training airborne data link end machine detection device and comprises the following steps:
connecting a tested terminal machine with a detection device through a special test cable, connecting a power supply cable, starting a power supply, checking whether the output value of a direct current power supply is in a normal working range, and turning on a control computer, an embedded training chain exciter and a power meter power switch;
after the control computer is started, the airborne data excitation software is opened to complete software configuration;
step three, opening Gnd ground embedded training control software, completing starting and self-checking of an embedded training chain exciter, and placing the embedded training chain exciter in a link starting state;
opening Air airborne information processing software to complete the starting and self-checking of the tested terminal machine, and placing the tested terminal machine in a link starting state;
step five, displaying the accessed network by the aid of a Gnd ground embedded training control software interface, and successfully networking;
after networking is successful, multi-rate self-adaptive receiving, double-antenna receiving, transmitting power, sensitivity function and performance index testing are carried out;
and (seventhly), after the test is finished, closing the test program, closing the control computer, the embedded training chain exciter and the power supply of the power meter, and closing the power supply of the system.
Preferably, the specific test procedure of the multi-rate adaptive reception in the step (six) is as follows:
after networking is successful, clicking local control on an Air airborne information processing software interface, selecting one of the idle transmission rates R1, R2, R3 and R4 on a popped local control interface, clicking the setting, and displaying that the command is successfully executed;
clicking local control on a Gnd ground embedded training control software interface, selecting one of the idle transmission rates R1, R2, R3 and R4 on a popped local control interface, clicking the local control, and displaying that the command is successfully executed;
and (3) observing a real-time packet loss rate analysis interface of the Gnd ground embedded training control software, wherein the received transmission packet error rate is not more than 5%, and the result is qualified.
Preferably, the specific test procedure of the dual-antenna reception in the step (six) is as follows:
after networking is successful, clicking on a Gnd ground embedded training control software interface for real-time analysis, and viewing the number of received packets of the airborne terminal and the statistical packet loss rate in real time on a popped interface;
and (b) if the packet loss rate is not greater than 5%, determining that the dual-antenna receiving function is normal, and if the packet loss rate is greater than 5%, determining that the dual-antenna receiving function is abnormal.
Preferably, the specific test procedure of the transmission power in the step (six) is as follows:
after networking is successful, clicking local control on a Gnd ground embedded training control software interface, selecting channel number 1 on a popped interface, clicking for setting, and displaying that a command is successfully executed;
clicking local control on an Air airborne information processing software interface, selecting 1 channel number and 0 transmitting power on a popped interface, clicking for setting, and displaying that the command is successfully executed;
and (C) reading the power value of the power meter, and subtracting the attenuator and the insertion loss of the cable from the power value to obtain the transmitting power of the tested terminal machine.
Preferably, the specific test procedure of the sensitivity in the step (six) is as follows:
step (S1) clicking local control on a Gnd ground embedded training control software interface, selecting a link switch, selecting a platform address 181 on a popped interface, starting the link switch, setting the transmitting power to be 22, clicking the link switch, displaying that the command is successfully executed after the command is successfully executed, and starting a ground station link switch;
step (S2) the adjustable attenuator is set to be 0, and the transmitting power of the exciter is measured by a power meter and recorded as A1;
after networking is completed, selecting local control on an Air airborne information processing software interface, selecting a channel number 1 on the local control interface, setting transmission rates according to R1-R4 respectively, and displaying that a command is successfully executed by clicking;
step (S4), clicking to analyze in real time, and observing the packet loss rate of the airborne terminal machine on a pop-up interface;
and (S5) increasing the attenuation amount of the adjustable attenuator, observing the packet loss rate, and recording the maximum attenuation amount of the adjustable attenuator at the moment as A2 under the condition that the packet loss rate is not more than 2%, wherein the sensitivity is A1-A2.
The beneficial effects of the invention are:
compared with the prior art, the off-line detection of the terminal is realized by hardware resources such as embedded training chain exciter software and test control software, which are supplemented with a power meter, a direct-current power supply, an embedded training chain exciter, a control computer and the like, the defect that the environment on a real machine needs to be provided in the previous test is overcome, the test cost is saved, and the test efficiency is improved. Meanwhile, the quantitative test of performance indexes such as transmitting power, sensitivity and the like is realized, and an efficient test method is provided for fault location and repair of the terminal.
Drawings
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of a detecting device according to the present invention;
FIG. 2 is a block diagram of the system components of the inspection apparatus of the present invention;
FIG. 3 is a block diagram of the present invention with embedded training chain actuators;
FIG. 4 is a connection diagram of a networking, multi-rate adaptive reception test of the present invention;
FIG. 5 is a diagram of a dual antenna reception test connection according to the present invention;
FIG. 6 is a transmission power test connection diagram of the present invention;
FIG. 7 is a connection diagram of the sensitivity test of the present invention;
FIG. 8 is a flow chart of the test of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further explained in the following with the accompanying drawings and the embodiments.
As shown in fig. 1 and fig. 2, an embedded training airborne data link end machine detection device comprises a machine cabinet, a control computer, an embedded training link exciter, a program-controlled direct-current power supply, a power meter, a test interface, a fixed/adjustable attenuator and a special test cable.
The cabinet is used for realizing intensive erection of instrument resources, providing a cable laying space and ensuring the whole device to be compact and stable. The special test cable comprises a radio frequency cable and a low frequency cable.
The control computer is arranged on the cabinet and is a system control center, and the control computer internally comprises airborne data excitation software, gnd ground embedded training control software and Air airborne information processing software. And running a test program on the control computer, wherein the test program is used for controlling the modular instrument and the special test equipment, outputting an excitation signal, measuring the response of the tested terminal and judging whether the function and the performance of the tested terminal are normal or not. In the testing process, testing resources are uniformly scheduled, excitation source parameters are set, excitation signals are generated, conditioning is completed, and signal acquisition and measurement output by the tested terminal machine are completed. And controlling the tested terminal machine to complete the test according to a set program, acquiring and sorting the test data, and quickly positioning the fault component when the fault occurs.
The embedded training chain exciter is arranged on the machine cabinet, is in communication connection with the control computer through an LAN interface, and is used for simulating a ground terminal machine and an airborne terminal machine to realize networking and data receiving and transmitting functions, simulating network management equipment to carry out network planning, and carrying out packet loss rate and transmitted packet number statistics by matching with the control computer.
As shown in fig. 3, the embedded training chain exciter includes an exciter panel, a power module, a channel module, and a communication module.
The exciter panel comprises an exciter front panel and an exciter rear panel, a radio frequency interface and an exciter power switch which are connected with the test interface and the channel module are arranged on the exciter front panel, and a LAN port connected with the control computer and the communication module and an alternating current interface connected with an external power supply and the power module are arranged on the exciter rear panel.
The power module is used for converting an externally input alternating current 220v power supply into direct currents 28v and 5v required by an internal circuit of the exciter, the direct current 28v and 5v are connected with a power interface on a rear panel of the exciter through a power line, and the power module is connected with the channel module through a lead.
The channel module has the basic functions of self-checking, setting and inquiring the working parameters of the exciter, simulating a ground terminal machine and an airborne terminal machine to realize networking, receiving and transmitting data and the like, and is connected to a radio frequency interface on the front panel of the exciter through a radio frequency cable.
The communication module is used for data communication and data processing between the exciter and the computer, and is connected with the rear panel of the exciter through the LAN port.
The program-controlled direct-current power supply is arranged on the machine cabinet, is in communication connection with the control computer through a LAN/RS232 interface and is used for providing power supply for the tested terminal machine.
The power meter is arranged on the cabinet, is in communication connection with the control computer through a LAN/RS232 interface and is used for measuring the transmitting power of the tested terminal machine.
The test interface is respectively connected with the embedded training chain exciter, the program-controlled direct-current power supply, the power meter and the tested terminal machine through special test cables. As shown in fig. 2, in the figure, RF represents a radio frequency signal, and the power meter and the embedded training chain exciter are connected with the test interface by using a radio frequency cable; DC represents the output of a direct current power supply, and the program-controlled direct current power supply is connected with the test interface by adopting a power line.
The fixed/adjustable attenuator is arranged on the machine cabinet, is respectively connected with the test interface and the tested terminal machine through a special test cable, and is used for adjusting the signal intensity between the detection device and the tested terminal machine. As shown in fig. 2, in the figure, RF represents a radio frequency signal, and the fixed/adjustable attenuator is connected to the test interface and the terminal under test through radio frequency cables, respectively.
As shown in fig. 8, a method for detecting an embedded trainer airborne data link end detection device, which applies the above-mentioned embedded trainer airborne data link end detection device, includes the following steps:
the method comprises the following steps of (I) connecting a tested terminal machine with a detection device through a special test cable, connecting a power supply cable, starting a power supply, checking whether the output value of a direct current power supply is in a normal working range, and turning on a control computer, an embedded training chain exciter and a power meter power switch.
And (II) after the control computer is started, opening airborne data excitation software to complete software configuration.
And (III) opening Gnd ground embedded training control software, completing the starting and self-checking of the embedded training chain exciter, and placing the embedded training chain exciter in a link starting state.
And step four, opening Air airborne information processing software to complete the starting and self-checking of the tested end machine, and placing the tested end machine in a link starting state.
And (V) displaying the network access and successful networking by the aid of a Gnd ground embedded training control software interface.
And (5) after the networking in the step (six) is successful, performing multi-rate self-adaptive receiving, double-antenna receiving, transmitting power, sensitivity function and performance index testing.
Specifically, as shown in fig. 4, the specific test procedure of the multi-rate adaptive reception is as follows:
and (2) after networking is successful, clicking local control on an Air airborne information processing software interface, selectively selecting one of the idle transmission rates R1, R2, R3 and R4 on the popped local control interface, clicking the setting, and displaying that the command is successfully executed.
And (2) clicking local control on the Gnd ground embedded training control software interface, selecting one of the idle transmission rates R1, R2, R3 and R4 on the popped local control interface, clicking the setting, and displaying that the command is successfully executed.
And (3) observing a real-time packet loss rate analysis interface of the Gnd ground embedded training control software, wherein the received transmission packet error rate is not more than 5%, and the result is qualified.
As shown in fig. 5, the specific test procedure for dual antenna reception is as follows:
and (b) after networking is successful, clicking on a Gnd ground embedded training control software interface for real-time analysis, and viewing the number of received packets of the airborne terminal and the statistical packet loss rate on a popped interface in real time.
And (b) if the packet loss rate is not greater than 5%, determining that the dual-antenna receiving function is normal, and if the packet loss rate is greater than 5%, determining that the dual-antenna receiving function is abnormal.
As shown in fig. 6, the specific test procedure of the transmission power is as follows:
and (C) after networking is successful, clicking local control on a Gnd ground embedded training control software interface, selecting channel number 1 on a popped interface, clicking for setting, and displaying that the command is successfully executed.
And (B) clicking local control on an Air airborne information processing software interface, selecting 1 channel number on a popped interface, selecting 0 transmitting power, clicking for setting, and displaying that the command is successfully executed.
And (C) reading the power value of the power meter, and subtracting the attenuator and the insertion loss of the cable from the power value to obtain the transmitting power of the tested terminal machine.
As shown in fig. 7, the specific test procedure for sensitivity is as follows:
and (S1) clicking local control on a Gnd ground embedded training control software interface, selecting a link switch, selecting a platform address 181 on a popped interface, starting the link switch, setting the transmitting power to be 22, clicking the link switch, displaying that the command is successfully executed after the command is successfully executed, and starting a ground station link switch.
Step (S2) the adjustable attenuator is set to be 0, the transmitting power of the exciter is measured by a power meter and recorded as A1,
After networking is completed, selecting local control on an Air airborne information processing software interface, selecting a channel number 1 on the local control interface, setting transmission rates according to R1-R4 respectively, and displaying that a command is successfully executed by clicking;
step (S4), clicking to analyze in real time, and observing the packet loss rate of the airborne terminal machine on a pop-up interface;
and (S5) increasing the attenuation of the adjustable attenuator, observing the packet loss rate, and recording the maximum attenuation of the adjustable attenuator at the moment as A2 under the condition that the packet loss rate is not more than 2%, wherein the sensitivity is A1-A2.
And (seventhly), after the test is finished, the test program is closed, the control computer, the embedded training chain exciter and the power supply of the power meter are closed, and the system power supply is closed.
In the above fig. 4 to 7, L1-L5 are rf cables, and the net ports represent the connection of network cables; the 28V power supply is externally connected with a power line, XS1 in the tested machine-mounted terminal machine is a low-frequency interface and is connected through a low-frequency cable, and XS2 and XS3 are radio-frequency interfaces and are connected through a radio-frequency cable.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an embedded onboard data chain end detection device of training which characterized in that: the method comprises the following steps:
a cabinet;
the control computer is arranged on the cabinet and used for setting excitation source parameters, generating output excitation signals, completing the acquisition and measurement of signals output by the tested terminal machine and acquiring and sorting test data;
the embedded training chain exciter is arranged on the machine cabinet, is in communication connection with the control computer through an LAN (local area network) interface, is used for simulating a ground terminal machine and an airborne terminal machine to realize networking and data receiving and transmitting functions, simulating network management equipment to carry out network planning, and carrying out packet loss rate and transmitted packet number statistics by matching with the control computer;
the program-controlled direct-current power supply is arranged on the machine cabinet, is in communication connection with the control computer through an LAN/RS232 interface and is used for providing a power supply for the tested terminal machine;
the power meter is arranged on the cabinet, is in communication connection with the control computer through a LAN/RS232 interface and is used for measuring the transmitting power of the tested terminal machine;
the test interface is respectively connected with the embedded training chain exciter, the program-controlled direct-current power supply, the power meter and the tested terminal machine through special test cables;
and the fixed/adjustable attenuator is arranged on the machine cabinet, is respectively connected with the test interface and the tested terminal machine through a special test cable, and is used for adjusting the signal intensity between the detection device and the tested terminal machine.
2. The embedded detection device for the trainer airborne datalink according to claim 1, wherein: the special test cable comprises a radio frequency cable and a low frequency cable.
3. The embedded detection device for the trainer airborne datalink according to claim 1, wherein: the embedded training chain exciter comprises an exciter panel, a power module connected with the exciter panel, a channel module connected with the exciter panel and the power module, and a communication module connected with the exciter panel and the channel module.
4. The embedded detection device for the train onboard data link end of claim 3, wherein: the exciter panel comprises an exciter front panel and an exciter rear panel, a radio frequency interface and an exciter power switch which are connected with the test interface and the channel module are arranged on the exciter front panel, and a LAN port and an alternating current interface are arranged on the exciter rear panel, wherein the LAN port is connected with the control computer and the communication module, and the alternating current interface is connected with an external power supply and the power module.
5. The embedded detection device for the train onboard data link end of claim 1, wherein: the control computer comprises airborne data excitation software, gnd ground embedded training control software and Air airborne information processing software inside.
6. A detection method of an embedded detection device for an onboard data link end of a training machine is characterized by comprising the following steps: use of an embedded trainer airborne datalink end detection device according to any of claims 1 to 5, comprising the steps of:
connecting a tested terminal machine with a detection device through a special test cable, connecting a power supply cable, starting a power supply, checking whether the output value of a direct current power supply is in a normal working range, and turning on a control computer, an embedded training chain exciter and a power meter power switch;
after the control computer is started, the airborne data excitation software is opened to complete software configuration;
step three, opening Gnd ground embedded training control software, completing starting and self-checking of an embedded training chain exciter, and placing the embedded training chain exciter in a link starting state;
opening Air airborne information processing software to complete the starting and self-checking of the tested terminal machine, and placing the tested terminal machine in a link starting state;
step five, displaying the accessed network by the aid of a Gnd ground embedded training control software interface, and successfully networking;
after networking is successful, multi-rate self-adaptive receiving, double-antenna receiving, transmitting power, sensitivity function and performance index testing are carried out;
and (seventhly), after the test is finished, closing the test program, closing the control computer, the embedded training chain exciter and the power supply of the power meter, and closing the power supply of the system.
7. The detection method of the embedded detection device for the trainer airborne datalink according to claim 6, wherein the detection method comprises the following steps: the specific test procedure of the multirate adaptive reception in the step (six) is as follows:
after networking is successful, clicking local control on an Air airborne information processing software interface, selecting one of the idle transmission rates R1, R2, R3 and R4 on a popped local control interface, clicking the setting, and displaying that the command is successfully executed;
clicking local control on a Gnd ground embedded training control software interface, selecting one of idle transmission rates R1, R2, R3 and R4 on a popped local control interface, clicking to set, and displaying that the command is successfully executed;
and (3) observing a real-time packet loss rate analysis interface of the Gnd ground embedded training control software, wherein the received transmission packet error rate is not more than 5%, and the result is qualified.
8. The detection method of the embedded detection device for the trainer airborne datalink according to claim 6, wherein the detection method comprises the following steps: the specific test process of the dual-antenna reception in the step (six) is as follows:
after networking is successful, clicking on a Gnd ground embedded training control software interface for real-time analysis, and viewing the number of received packets of the airborne terminal and the statistical packet loss rate in real time on a popped interface;
and (b) if the packet loss rate is not greater than 5%, determining that the dual-antenna receiving function is normal, and if the packet loss rate is greater than 5%, determining that the dual-antenna receiving function is abnormal.
9. The detection method of the embedded detection device for the trainer airborne datalink according to claim 6, wherein the detection method comprises the following steps: the specific test process of the transmitting power in the step (VI) is as follows:
after networking is successful, clicking local control on a Gnd ground embedded training control software interface, selecting channel number 1 on a popped interface, clicking for setting, and displaying that a command is successfully executed;
clicking local control on an Air airborne information processing software interface, selecting 1 channel number and 0 transmitting power on a popped interface, clicking for setting, and displaying that the command is successfully executed;
and (C) reading the power value of the power meter, and subtracting the attenuator and the insertion loss of the cable from the power value to obtain the transmitting power of the tested terminal machine.
10. The detection method of the embedded detection device for the trainer airborne datalink according to claim 6, wherein the detection method comprises the following steps: the specific test process of the sensitivity in the step (six) is as follows:
step (S1) clicking local control on a Gnd ground embedded training control software interface, selecting a link switch, selecting a platform address 181 on a popped interface, starting the link switch, setting the transmitting power to be 22, clicking the link switch, displaying that the command is successfully executed after the command is successfully executed, and starting a ground station link switch;
step (S2) the adjustable attenuator is set to be 0, and the transmitting power of the exciter is measured by a power meter and recorded as A1;
after networking is completed, selecting local control on an Air airborne information processing software interface, selecting a channel number 1 on the local control interface, setting transmission rates according to R1-R4 respectively, and displaying that a command is successfully executed by clicking;
step (S4), clicking to analyze in real time, and observing the packet loss rate of the airborne terminal machine on a pop-up interface;
and (S5) increasing the attenuation amount of the adjustable attenuator, observing the packet loss rate, and recording the maximum attenuation amount of the adjustable attenuator at the moment as A2 under the condition that the packet loss rate is not more than 2%, wherein the sensitivity is A1-A2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211450145.2A CN115743593A (en) | 2022-11-19 | 2022-11-19 | Embedded training airborne data link end machine detection device and test method thereof |
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| CN202211450145.2A CN115743593A (en) | 2022-11-19 | 2022-11-19 | Embedded training airborne data link end machine detection device and test method thereof |
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