CN116488752A - Simulation test device and test method for aviation high-frequency signals - Google Patents
Simulation test device and test method for aviation high-frequency signals Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides an aviation high-frequency signal simulation test device and a test method, wherein the device comprises the following components: a program controlled amplifier; a program controlled attenuator; the radio frequency coupling module is in communication connection with the program-controlled amplifier and the program-controlled attenuator and is used for switching or coupling radio frequency signals; the radio module is in communication connection with the radio frequency coupling module and is used for acquiring high-frequency signals through the radio frequency coupling module, demodulating the high-frequency signals into intermediate-frequency signals, and analyzing and testing based on the intermediate-frequency signals obtained through demodulation or outputting the required radio frequency signals; and the computer module is in communication connection with the radio module and is used for setting up a working environment for the radio module and controlling the radio module to work. The invention can solve the technical problem that the software wireless level platform is difficult to be directly applied to the simulation test of the aviation high-frequency signals.
Description
Technical Field
The invention relates to the technical field of signal testing, in particular to an aviation high-frequency signal simulation testing device and a testing method.
Background
Special test equipment such as NAV-750C aviation signal sources of Aeroflex company has been accumulated for many years, the precision and reliability of such equipment are high, occupy most of the global market, but are expensive and difficult to customize; general test equipment, such as a software radio platform (USRP) based on software radio (SDR) technology, has a lot of scientific research properties and limited performance, and cannot be directly applied to aerial high-frequency signal simulation tests.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an apparatus and a method for simulating and testing an aerial high frequency signal, which are used for solving the technical problem that a software radio platform is difficult to be directly applied to the aerial high frequency signal simulation test.
In order to achieve the above object, the present invention provides an aviation high-frequency signal simulation test device, which is characterized by comprising:
a program controlled amplifier;
a program controlled attenuator;
the radio frequency coupling module is in communication connection with the program-controlled amplifier and the program-controlled attenuator and is used for switching or coupling radio frequency signals;
the radio module is in communication connection with the radio frequency coupling module and is used for acquiring high-frequency signals through the radio frequency coupling module, demodulating the high-frequency signals into intermediate-frequency signals, and analyzing and testing based on the intermediate-frequency signals obtained through demodulation or outputting the required radio frequency signals;
and the computer module is in communication connection with the radio module and is used for setting up a working environment for the radio module and controlling the radio module to work.
Further, the radio module includes:
the signal configuration unit is used for generating radio frequency signal configuration information and controlling the output of the required radio frequency signals;
the signal sampling unit is used for configuring the program-controlled amplifier or the program-controlled attenuator based on the radio frequency signal configuration information, collecting high-frequency signals from the program-controlled amplifier or the program-controlled attenuator, and demodulating the high-frequency signals to obtain intermediate-frequency signals;
and the signal analysis unit is used for comparing the intermediate frequency signal with the standard signal to obtain a signal analysis result.
Further, the radio module further includes:
and the signal playback unit is used for playing back the high-frequency signals acquired by the program-controlled amplifier or the program-controlled attenuator.
Further, the radio module further includes:
and the remote control unit is used for determining whether to select the signal analysis unit to work or select the signal playback unit to work based on the input control instruction.
Further, the signal analysis unit is configured to obtain a signal analysis result based on the waveform similarity, the amplitude difference value, and the frequency difference value between the intermediate frequency signal and the standard signal.
Further, the signal analysis unit is further configured to translate and amplify the waveforms of the intermediate frequency signal and the standard signal, and obtain a signal analysis result based on the waveform similarity, the amplitude difference and the frequency difference between the intermediate frequency signal and the standard signal.
Further, the signal sampling unit is configured to clip the intermediate frequency signal to obtain the labeling signal.
The invention also provides an aviation high-frequency signal simulation test method which is applied to the device of any one of the above, and comprises the following steps:
building a working environment for the radio module based on a computer module;
and acquiring a high-frequency signal from the radio frequency coupling module based on the radio module, demodulating the high-frequency signal into an intermediate-frequency signal, and performing analysis and test based on the intermediate-frequency signal obtained by demodulation, or outputting a required radio frequency signal.
Further, the demodulating the high-frequency signal into an intermediate-frequency signal, and performing an analysis test based on the intermediate-frequency signal obtained by demodulation, includes:
collecting a high-frequency signal from the program-controlled amplifier or the program-controlled attenuator, and demodulating the high-frequency signal to obtain an intermediate-frequency signal;
and comparing the intermediate frequency signal with a standard signal to obtain a signal analysis result.
Further, the comparing the intermediate frequency signal with the standard signal to obtain a signal analysis result includes:
and obtaining a signal analysis result based on the waveform similarity, the amplitude difference and the frequency difference between the intermediate frequency signal and the standard signal.
The beneficial effects of the implementation mode are that: according to the invention, the program-controlled amplifier and the program-controlled attenuator are used for receiving the high-frequency signals, the radio module is used for acquiring the high-frequency signals based on the radio frequency coupling module and demodulating the high-frequency signals into the intermediate-frequency signals, and then the analysis and the test are carried out based on the intermediate-frequency signals obtained by demodulation, so that the test of the high-frequency signals of the electronic equipment of the aircraft is realized, namely, the information carried in the high-frequency signals is received and analyzed, and the technical problem that a software radio platform is difficult to be directly applied to the simulation test of the aviation high-frequency signals is solved. Or the radio module outputs the required radio frequency signals in a simulation mode, namely, the radio module transmits specific aviation high-frequency signals in a simulation mode.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the simulation test device for aviation high-frequency signals;
fig. 2 is a flowchart of the simulation test method for aviation high-frequency signals provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or modules is not necessarily limited to those steps or modules that are expressly listed or inherent to such process, method, article, or device.
The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed according to the time/logic sequence indicated by the naming or numbering, and the named or numbered flow steps may change the execution sequence according to the technical purpose to be achieved, so long as the same or similar technical effects can be achieved.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention provides an aviation high-frequency signal simulation test device and a test method, which are respectively described below.
The invention provides an aviation high-frequency signal simulation test device, which comprises:
a programmable amplifier 150;
program-controlled attenuator 140;
a radio frequency coupling module 130, which is communicatively connected to the programmable amplifier 150 and the programmable attenuator 140, and is configured to switch or couple radio frequency signals;
the radio module 120 is in communication connection with the radio frequency coupling module 130, and is configured to collect a high frequency signal through the radio frequency coupling module 130, demodulate the high frequency signal into an intermediate frequency signal, and perform an analysis test based on the intermediate frequency signal obtained by demodulation, or output a required radio frequency signal;
a computer module 110, communicatively coupled to the radio module 120, for building an operating environment for the radio module 120 and controlling the operation of the radio module 120.
It is understood that each computer module 110 corresponds to one radio module 120, and the number of radio modules 120 may be 1 or 2.
Simulation of the high-frequency signals of the aircraft electronic equipment, namely simulation of transmitting specific aviation high-frequency signals in a simulation mode. And (3) testing the high-frequency signals of the aircraft electronic equipment, namely receiving and analyzing information carried in the high-frequency signals. The high frequency signals include high frequencies 2-30MHz and very high frequencies 118-135.975MHz. Medium and low frequency: ADF navigates 190-550kHz. There are various kinds of aviation high-frequency signals, and ILS, MLS, TACAN, VOR is common.
For the detection and maintenance of an aircraft system, simulation tests are generally performed by selecting a plurality of typical state points (frequency, intensity, etc.) according to technical indexes, and the test is not required to be performed by exhausting each state point.
In an external field environment, an antenna 160 is generally installed in an aircraft system, high-frequency signals need to be transmitted and received based on the coupling of the antenna 160, in an internal field maintenance environment, accessories of an aircraft part are generally independently tested, and a high-frequency signal transceiver host without the antenna 160 is directly connected through a high-frequency cable.
The computer module 110 may be a portable computer for setting up a software radio environment for controlling a general-purpose software radio.
The radio module 120 may be a general-purpose software radio for collecting playback and generating the required radio frequency signals. The hardware portion of the radio module 120 may be based on USRP (universal software radio peripheral), or may be replaced by other software radios.
The rf coupling module 130 may be an rf switch/coupler for switching and coupling rf signals.
The programmable attenuator 140 is used to reduce the radio frequency signal amplitude to meet the required signal amplitude requirements.
The programmable amplifier 150 is used to amplify the radio frequency signal amplitude to meet the required signal amplitude requirement.
The programmable attenuator 140 and the programmable amplifier 150 may receive and transmit radio frequency signals via the antenna 160.
Since the range of high frequency signal strengths that can be handled by the generic software radio is small, the signal strength is reduced by the programmable attenuator 140 and increased by the programmable amplifier 150. The radio frequency switch is convenient for processing signals in parallel through a plurality of general software radio devices, and the bandwidth of signal processing is expanded.
In some embodiments, the radio module 120 includes:
the signal configuration unit is used for generating radio frequency signal configuration information and controlling the output of the required radio frequency signals;
the signal sampling unit is configured to configure the programmable amplifier 150 or the programmable attenuator 140 based on the radio frequency signal configuration information, collect a high frequency signal from the programmable amplifier 150 or the programmable attenuator 140, and demodulate the high frequency signal to obtain an intermediate frequency signal;
the signal analysis unit is used for comparing the intermediate frequency signal with the standard signal to obtain a signal analysis result; a signal playback unit, configured to play back the high-frequency signal collected by the programmable amplifier 150 or the programmable attenuator 140;
and the remote control unit is used for determining whether to select the signal analysis unit to work or select the signal playback unit to work based on the input control instruction.
It can be understood that the signal configuration unit adopts a tree list, provides management functions such as searching, adding, deleting and the like, and is convenient for selecting signal types and subordinate state points, and each state point corresponds to parameters such as a sampling file, amplification or attenuation parameters, signal frequency, bandwidth, a modulation and demodulation mode and the like.
The signal sampling unit configures the program-controlled amplifier 150 or the program-controlled attenuator 140 according to the configuration information, and conditions the signal to proper signal intensity; demodulating the high-frequency signal received by sampling into an intermediate-frequency signal, and displaying and recording in real time.
The signal playback unit configures the programmable amplifier 150 or the programmable attenuator 140 according to the configuration information, conditions to a proper signal intensity, and modulates the acquired signal for circulation or single playback.
The remote control unit provides remote control functions of the modules such as signal analysis and signal playback, and is convenient to integrate into an automatic test system.
During signal playback, synchronous signal sampling can be selected, whether playback and signal acquisition channels have faults or not can be judged conveniently, and whether the intensity of signal playback conditioning is proper or not can be determined conveniently by combining a signal analysis function.
In some embodiments, the signal analysis unit is configured to obtain a signal analysis result based on a waveform similarity, an amplitude difference, and a frequency difference between the intermediate frequency signal and the standard signal.
Further, the signal analysis unit is further configured to translate and amplify the waveforms of the intermediate frequency signal and the standard signal, and obtain a signal analysis result based on the waveform similarity, the amplitude difference and the frequency difference between the intermediate frequency signal and the standard signal.
It can be understood that the signal analysis unit compares the current demodulated sampling signal with the standard signal, adopts red and green colors to represent the current signal and the standard signal, provides functions of waveform translation, amplification and the like, and is convenient for judgment; parameters such as similarity, amplitude, frequency and the like of the optional waveforms are automatically analyzed, and automatic judgment is performed according to the error allowable range.
In some embodiments, the signal sampling unit is configured to clip the intermediate frequency signal to obtain the labeling signal.
It can be understood that the signal sampling unit configures the programmable amplifier 150 or the programmable attenuator 140 according to the configuration information, and conditions the signal to a proper signal intensity; demodulating the sampled and received high-frequency signal into an intermediate-frequency signal, displaying and recording in real time, and selecting a part of the signals for clipping, so that the most suitable signal can be conveniently selected and used as a standard signal for reference during signal playback or signal analysis.
In summary, the aviation high-frequency signal simulation test device provided by the invention comprises: a programmable amplifier 150; program-controlled attenuator 140; a radio frequency coupling module 130, which is communicatively connected to the programmable amplifier 150 and the programmable attenuator 140, and is configured to switch or couple radio frequency signals; the radio module 120 is in communication connection with the radio frequency coupling module 130, and is configured to collect a high frequency signal through the radio frequency coupling module 130, demodulate the high frequency signal into an intermediate frequency signal, and perform an analysis test based on the intermediate frequency signal obtained by demodulation, or output a required radio frequency signal; a computer module 110, communicatively coupled to the radio module 120, for building an operating environment for the radio module 120 and controlling the operation of the radio module 120.
In the aviation high-frequency signal simulation test device provided by the invention, the program-controlled amplifier 150 and the program-controlled attenuator 140 are used for receiving high-frequency signals, the radio module 120 is used for collecting the high-frequency signals based on the radio frequency coupling module 130 and demodulating the high-frequency signals into intermediate-frequency signals, and then the analysis test is carried out based on the intermediate-frequency signals obtained by demodulation, so that the test of the high-frequency signals of the aircraft electronic equipment is realized, namely, the information carried in the high-frequency signals is received and analyzed, and the technical problem that a software radio platform is difficult to be directly applied to the aviation high-frequency signal simulation test is solved. Or the radio module 120 may output the desired radio frequency signal in analog, i.e., by simulating, the emission of a particular airborne high frequency signal.
The aviation high-frequency signal simulation test device provided by the invention has the following advantages:
one is to facilitate the generation of the various signals required. Through simulation of common signals, secondary development of carrier frequency and modulation signals of radio frequency signals is conducted by referring to existing experience, a special module is built, and high-frequency signals required by the exterior of avionics products, intermediate-frequency signals and low-frequency signals required by the interior of avionics products are generated.
Secondly, signal analysis is facilitated. Through the collection of the signals, whether the signals are normal or not can be analyzed through a known radio frequency signal composition mode and a software radio modulation and demodulation module, and the maintenance of avionics products is facilitated.
Thirdly, after the signal conversion, the existing experience can be used for processing the high-frequency signal, the high-frequency signal is changed into an intermediate-frequency signal through modulation and demodulation, and the experience of an oscilloscope can be used for processing the intermediate-frequency signal in a large amount.
Fourthly, the operation is simple. Parameters to be configured, such as signal sampling and automatic analysis in signal analysis, are mainly analyzed by technicians, and standards are set, so that the operation can be performed once for all. And only proper signals are needed to be selected for signal playback, automatic analysis in signal analysis and the like, the manual analysis operation is similar to the comparison of two groups of waveforms by an oscilloscope, and the operation is simple and the user is directly on hand.
And fifthly, the hardware part adopts commercial hardware produced in batches, the cost is low, and the problem that the consistency of middle-low end hardware is lower than that of high end hardware can be improved through software calibration.
The core of the invention is to modulate and demodulate the high-frequency signal into the intermediate-frequency signal, which is convenient to process the intermediate-frequency signal by adopting the traditional mode, but the invention is not limited to the AM mode, and can also be other modes such as FM and the like.
The core of the radio module 120 is configuration information and sampling data, from which more data acquisition and processing functions can be derived, such as averaging from multiple sets of acquired data, empirical values of tolerances, unattended automatic monitoring of analysis signals, etc.
The invention also provides an aviation high-frequency signal simulation test method which is applied to the device of any one of the above, and comprises the following steps:
building a working environment for the radio module 120 based on the computer module 110;
the radio module 120 collects high frequency signals from the rf coupling module 130, demodulates the high frequency signals into intermediate frequency signals, and performs analysis tests based on the demodulated intermediate frequency signals or outputs desired rf signals.
In some embodiments, the demodulating the high frequency signal into an intermediate frequency signal and performing an analytical test based on the demodulated intermediate frequency signal includes:
collecting a high-frequency signal from the program-controlled amplifier 150 or the program-controlled attenuator 140, and demodulating the high-frequency signal to obtain an intermediate-frequency signal;
and comparing the intermediate frequency signal with a standard signal to obtain a signal analysis result.
In some embodiments, the comparing the intermediate frequency signal with the standard signal to obtain a signal analysis result includes:
and obtaining a signal analysis result based on the waveform similarity, the amplitude difference and the frequency difference between the intermediate frequency signal and the standard signal.
Those skilled in the art will appreciate that all or part of the flow of the methods of the embodiments described above may be accomplished by way of a computer program that instructs associated hardware, and that the program may be stored in a computer readable storage medium. The computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory.
The aviation high-frequency signal simulation test device and the test method provided by the invention are described in detail, and specific examples are applied to the description of the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.
Claims (10)
1. An aviation high-frequency signal simulation test device is characterized by comprising:
a program controlled amplifier;
a program controlled attenuator;
the radio frequency coupling module is in communication connection with the program-controlled amplifier and the program-controlled attenuator and is used for switching or coupling radio frequency signals;
the radio module is in communication connection with the radio frequency coupling module and is used for acquiring high-frequency signals through the radio frequency coupling module, demodulating the high-frequency signals into intermediate-frequency signals, and analyzing and testing based on the intermediate-frequency signals obtained through demodulation or outputting the required radio frequency signals;
and the computer module is in communication connection with the radio module and is used for setting up a working environment for the radio module and controlling the radio module to work.
2. The aerial high frequency signal simulation test device of claim 1, wherein the radio module comprises:
the signal configuration unit is used for generating radio frequency signal configuration information and controlling the output of the required radio frequency signals;
the signal sampling unit is used for configuring the program-controlled amplifier or the program-controlled attenuator based on the radio frequency signal configuration information, collecting high-frequency signals from the program-controlled amplifier or the program-controlled attenuator, and demodulating the high-frequency signals to obtain intermediate-frequency signals;
and the signal analysis unit is used for comparing the intermediate frequency signal with the standard signal to obtain a signal analysis result.
3. The aerial high frequency signal simulation test device of claim 2, wherein the radio module further comprises:
and the signal playback unit is used for playing back the high-frequency signals acquired by the program-controlled amplifier or the program-controlled attenuator.
4. The aerial high frequency signal simulation test device of claim 3, wherein the radio module further comprises:
and the remote control unit is used for determining whether to select the signal analysis unit to work or select the signal playback unit to work based on the input control instruction.
5. The aviation high-frequency signal simulation test device according to claim 2, wherein,
the signal analysis unit is used for obtaining a signal analysis result based on the waveform similarity, the amplitude difference value and the frequency difference value between the intermediate frequency signal and the standard signal.
6. The aerial high frequency signal simulation test device according to claim 5, wherein,
the signal analysis unit is further configured to translate and amplify the waveforms of the intermediate frequency signal and the standard signal, and obtain a signal analysis result based on the waveform similarity, the amplitude difference and the frequency difference between the intermediate frequency signal and the standard signal.
7. The aviation high-frequency signal simulation test device according to claim 2, wherein,
and the signal sampling unit is used for clipping the intermediate frequency signal to obtain the marking signal.
8. An aviation high-frequency signal simulation test method, which is applied to the device of any one of claims 1-7, and comprises the following steps:
building a working environment for the radio module based on a computer module;
and acquiring a high-frequency signal from the radio frequency coupling module based on the radio module, demodulating the high-frequency signal into an intermediate-frequency signal, and performing analysis and test based on the intermediate-frequency signal obtained by demodulation, or outputting a required radio frequency signal.
9. The simulation test method of aviation high-frequency signals according to claim 8, wherein the demodulating the high-frequency signals into intermediate-frequency signals and performing an analysis test based on the intermediate-frequency signals obtained by demodulation comprises:
collecting a high-frequency signal from the program-controlled amplifier or the program-controlled attenuator, and demodulating the high-frequency signal to obtain an intermediate-frequency signal;
and comparing the intermediate frequency signal with a standard signal to obtain a signal analysis result.
10. The simulation test method of aviation high-frequency signals according to claim 9, wherein comparing the intermediate-frequency signals with standard signals to obtain signal analysis results comprises:
and obtaining a signal analysis result based on the waveform similarity, the amplitude difference and the frequency difference between the intermediate frequency signal and the standard signal.
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| CN117092931A (en) * | 2023-08-31 | 2023-11-21 | 深圳市银飞电子科技有限公司 | Avionics simulation test method and device, electronic equipment and storage medium |
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| CN117092931A (en) * | 2023-08-31 | 2023-11-21 | 深圳市银飞电子科技有限公司 | Avionics simulation test method and device, electronic equipment and storage medium |
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