CN114640363B

CN114640363B - Auxiliary spectrum data acquisition device of engine

Info

Publication number: CN114640363B
Application number: CN202111532016.3A
Authority: CN
Inventors: 刘乾; 周晓雄; 刘洋
Original assignee: Beijing Institute of Remote Sensing Equipment
Current assignee: Beijing Institute of Remote Sensing Equipment
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2023-06-20
Anticipated expiration: 2041-12-14
Also published as: CN114640363A

Abstract

The invention discloses an engine auxiliary spectrum data acquisition device. The engine auxiliary spectrum data acquisition device comprises: a transceiver system and a storage system; the multi-channel receiver is arranged in the receiving and transmitting system, so that independent receiving of multi-quadrant signals can be realized, convenience in receiving of engine auxiliary spectrum data is improved, and the multi-channel data acquisition device and the data storage are arranged in the storage system, so that simultaneous acquisition of multiple channel data can be realized, and further the storage bandwidth is improved.

Description

Auxiliary spectrum data acquisition device of engine

Technical Field

The invention relates to the technical field of data acquisition, in particular to an engine auxiliary spectrum data acquisition device.

Background

When the aircraft flies, the compressor rotor rotating at high speed of the aeroengine can carry out amplitude modulation and phase modulation on the echo signal of the active seeker, and the modulation effect can lead the engine auxiliary spectrum to appear on the frequency domain of the signal received by the active seeker. The engine side spectrum belongs to the research content of the target characteristics of the seeker.

The guide head target characteristic (RCS) has been studied for many years, a mature engineering practical calculation method based on target outline dimension through theoretical calculation exists, and a comprehensive target RCS omnidirectional test method and test data exist. The engine auxiliary spectrum is a special target characteristic, and is related to the position, the appearance and the size of an engine air inlet, the size and the appearance of an air inlet pipe, the appearance, the number and the size of compressor rotor blades, the rotating speed of a compressor rotor and other factors, and a practical calculation model which can be applied to engineering is not available at present due to a plurality of related factors. Currently, research on engine side spectra mainly obtains data through experiments.

Because a plurality of units are required to be coordinated for carrying out the engine auxiliary spectrum acquisition test, the coordination is difficult, the test system is complex to build, the test steps are complicated, the test system is constructed temporarily by each project group and the test is organized by itself, and the recorded data is very limited. And each project group is difficult to share due to the heterogeneity of the test system. With the rapid increase of the demand of research on target characteristics of large-scale multiple aircrafts such as air oiling, air early warning command machines, strategic bombers, large-scale transportation machines and the like in recent years, the requirement of collecting a large amount of engine auxiliary spectrum test data in an omnibearing and multiple rotating speeds is urgent, and an engine auxiliary spectrum collection system with convenient construction and simple operation is urgently needed.

With the development of new generation of air defense weapons, the demands for research on the target characteristics of large aircraft such as air oil supply, air pre-warning command machines, strategic bombers, large conveyors and the like are increasing rapidly. The engine auxiliary spectrum is used as a special target characteristic, and a large amount of engine auxiliary spectrum test data is required to be collected in an omnibearing and multi-rotating-speed mode. Because of the complex structure of the engine secondary spectrum acquisition test, a test system is generally built and tested by each project group. The test method has two problems, namely, each item has different functions, variable frequency links and sampling rates, the capability of matched storage equipment is limited, the acquired data formats are different, even the acquired data formats are limited by the storage rates, the sampling rates are reduced, and data loss is caused.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides an engine auxiliary spectrum data acquisition device.

In order to achieve the above object, the present invention provides the following solutions:

an engine secondary spectrum data acquisition device, comprising: a transceiver system and a storage system;

the transceiver system includes a multichannel receiver;

the storage system comprises a multichannel data collector and a data storage;

the multichannel receiver is connected with the multichannel data collector; the multichannel data collector is connected with the data memory.

Preferably, the transceiver system further comprises: the system comprises a feed source, a transmitter, a transmitting antenna and a receiving antenna;

the feed source is respectively connected with the transmitter, the multichannel receiver and the multichannel data acquisition unit; the transmitter is connected with the transmitting antenna; the receiving antenna is connected with the multichannel receiver.

Preferably, the multichannel receiver comprises a plurality of reception channels; each of the receive channels includes: the low-noise amplifier comprises a gating switch, a low-noise amplifier, a first mixer, a first filter, a second mixer, a second filter, an attenuator, a first amplifier, a power divider, a third mixer, a narrow-band filter, a broadband filter, a second amplifier and a third amplifier;

the gating switch is respectively connected with the receiving antenna and the low-noise amplifier; the low-noise amplifier is connected with the first mixer; the first mixer is respectively connected with the first filter and the feed source; the first filter is connected with the second mixer; the second mixer is respectively connected with the second filter and the feed source; the second filter is connected with the attenuator; the first amplifier is respectively connected with the attenuator and the power divider; the power divider is respectively connected with the third mixer and the broadband filter; the third mixer is respectively connected with the feed source and the narrow-band filter; the narrow-band filter is connected with the second amplifier; the broadband filter is connected with the third amplifier; the second amplifier and the third amplifier are both connected with the multichannel data collector.

Preferably, the multi-channel data collector comprises an FPGA, a first DDR4 memory, a second DDR4 memory, a first Raid card, a plurality of solid state disks and a plurality of collecting channels;

the acquisition channels are connected with the FPGA; the FPGA is respectively connected with the first DDR4 memory and the second DDR4 memory; the first DDR4 memory and the second DDR4 memory are both connected with the first Raid card; the first Raid card is connected with the plurality of solid disks respectively, and the first Raid card is also connected with the data storage through optical fibers.

Preferably, the data storage comprises a second Raid card and a plurality of hard disks;

the second Raid card is connected with the first Raid card through optical fibers, and the second Raid card is respectively connected with a plurality of hard disks.

Preferably, the memory frequency of the first DDR4 memory and the second DDR4 memory is 2400MHz; the timing sequence of the first DDR4 memory and the second DDR4 memory is CL-16-16-16-39.

Preferably, the device further comprises a wave absorbing plate; the wave absorbing plate is configured to form a first chamber for accommodating the transmitting antenna and a second chamber for accommodating the receiving antenna.

Preferably, the receiving antenna is a flat slot array antenna.

Preferably, the transmitting antenna is a lens antenna.

Preferably, the feed source comprises: the crystal oscillator, the first power divider, the first frequency multiplier, the second frequency multiplier, the third frequency multiplier, the second power divider, the third power divider, the fourth mixer, the fifth mixer, the first DDS, the second DDS and the fourth amplifier;

the crystal oscillator is connected with the first power divider; the first power divider is respectively connected with the multichannel data collector, the first amplifier, the third octave, the second frequency multiplier and the first frequency multiplier; the first frequency multiplier is connected with the second power divider; the second power divider is respectively connected with the first mixer and the fourth mixer; the fourth mixer is connected with the fourth amplifier; the fourth amplifier is connected with the transmitter; the second frequency multiplier is connected with the third power divider; the third power divider is connected with the first DDS and the second mixer respectively; the first DDS is connected with the fifth mixer; the fifth mixer is connected with the fourth mixer; the tripler is connected with the second DDS; the second DDS is connected with the fifth mixer.

According to the specific embodiment provided by the invention, the invention discloses the following technical effects:

the invention provides an engine auxiliary spectrum data acquisition device, which comprises: a transceiver system and a storage system; the multi-channel receiver is arranged in the receiving and transmitting system, so that independent receiving of signals in multiple quadrants can be realized, convenience in receiving of engine auxiliary spectrum data is improved, and simultaneous acquisition of multiple channel data can be realized by arranging the multi-channel data acquisition device and the data storage in the storage system, so that the storage rate is improved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

FIG. 1 is a schematic diagram of a secondary spectrum data acquisition device of an engine;

fig. 2 is a schematic structural diagram of a transceiver system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a storage system according to an embodiment of the present invention.

Reference numerals illustrate:

the system comprises a transmitting antenna 1, a receiving antenna 2, a spectrum analyzer 3, a multichannel data acquisition unit 4, a data memory 5, a transmitter 6, a multichannel receiver 7, a feed source 8, a wave absorbing plate 9, a 10-receiving and transmitting system and a storage system 11.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

As shown in fig. 1, the engine auxiliary spectrum data acquisition device provided by the invention comprises: a transceiver system 10 and a storage system 11.

The transceiver system 10 comprises a multichannel receiver 7. The storage system 11 comprises a multi-channel data collector 4 and a data storage 5.

The multi-channel receiver 7 is connected to the multi-channel data collector 4. The multi-channel data collector 4 is connected to a data memory 5. For example, the multi-channel data collector 4 can perform large-data-volume data migration with the data storage 5 through optical fibers. The multi-channel data collector 4 can sample a plurality of receiving channels in parallel and realize high-speed data storage. The data memory 5 realizes the safe storage of large data volume acquisition data.

By arranging the multichannel receiver 7 in the transceiver system 10, independent receiving of signals in multiple quadrants can be realized, so that convenience in receiving of engine auxiliary spectrum data is improved, and by arranging the multichannel data collector 4 and the data memory 5 in the storage system 11, simultaneous collection of multiple channel data can be realized, and further, the storage bandwidth is improved.

Further, in order to improve the convenience of receiving data of the whole device, the transceiver system 10 used in the present invention may further include: feed 8, transmitter 6, transmitting antenna 1 and receiving antenna 2.

The feed source 8 is respectively connected with the transmitter 6, the multichannel receiver 7 and the multichannel data collector 4. The transmitter 6 is connected to the transmitting antenna 1. The receiving antenna 2 is connected to a multichannel receiver 7. The frequency source may provide a reference frequency and transmit excitation signal for the multi-channel data collector 4, the transmitter 6 and the multi-channel receiver 7. The transmitter 6 can be a solid-state transmitter 6, and can realize the transmission power control under the saturated gain by controlling the number of the power amplifiers at each stage, and can realize the data acquisition work under the closed transmitter 6 by matching with the high-gain transmitting antenna 1 during the ground static engine secondary spectrum data acquisition test.

When the existing data acquisition device is used for data acquisition, the transmitting power is larger, and the test data is seriously affected by clutter, so that in order to reduce the clutter interference resistance of the engine auxiliary spectrum data acquisition device, the transmitting antenna 1 (1) adopted in the invention adopts a Ka frequency band and 40dB gain lens antenna, and the transmitting antenna 1 can control the 3dB wave beam within 2 degrees by utilizing the characteristic of a Ka frequency band narrow wave beam and combining the structural form of the lens antenna. And the lens antenna has the characteristics of gain of more than 40dB, so that the requirement of the whole device on the power of the transmitter 6 is reduced, and the requirement of low transmitting power in a static test scene is met, thereby reducing the energy of the hybrid wave, and the influence of sidelobe clutter can be further reduced due to the characteristics of low sidelobe and narrow wave beams. The invention selects the flat slot array antenna with narrow wave beam and low side lobe as the receiving antenna 2, and reduces the apparent energy of the clutter of the main and side lobes, thereby reducing the influence of the clutter on the acquired data. For example, when the receiving antenna 2 adopted by the invention is a four-quadrant flat slot array antenna, four-quadrant independent receiving of the antenna can be realized. The four-quadrant channel receiving mode of the antenna provides flexibility, a sum-difference device can be added between the receiving antenna 2 and the multi-channel receiver 7 to realize three-channel data acquisition, and a digital three-channel can be formed in a digital sum-difference mode after four-channel acquisition.

Further, the multi-channel receiver 7 provided by the present invention may include a plurality of receiving channels. Each receive channel includes: the low-noise amplifier comprises a gating switch, a low-noise amplifier, a first mixer, a first filter, a second mixer, a second filter, an attenuator, a first amplifier, a power divider, a third mixer, a narrow-band filter, a broadband filter, a second amplifier and a third amplifier.

The gating switch is connected to the receiving antenna 2 and the low noise amplifier, respectively. The low noise amplifier is connected to the first mixer. The first mixer is connected to the first filter and the feed 8, respectively. The first filter is connected with the second mixer. The second mixer is connected with the second filter and the feed source 8 respectively. The second filter is connected to the attenuator. The first amplifier is connected with the attenuator and the power divider respectively. The power divider is connected with the third mixer and the broadband filter respectively. The third mixer is connected with the feed source 8 and the narrow-band filter respectively. The narrow band filter is connected to the second amplifier. The broadband filter is connected to the third amplifier. The second amplifier and the third amplifier are both connected to a multi-channel data collector 4.

Furthermore, in order to realize fast reading and accessing of data, the multi-channel data collector 4 adopted in the invention comprises an FPGA, a first DDR4 memory, a second DDR4 memory, a first Raid card, a plurality of solid disks and a plurality of collecting channels.

The acquisition channels are all connected with the FPGA. The FPGA is respectively connected with the first DDR4 memory and the second DDR4 memory. The first DDR4 memory and the second DDR4 memory are both connected with the first Raid card. The first Raid card is connected to the plurality of solid state disks, respectively, and the first Raid card is also connected to the data storage 5 through optical fibers.

Based on the above structure of the multi-channel data collector 4, in the implementation process, the multi-channel data collector 4 adopts two sets of DDR4 memories to realize the first-level cache. The data acquired by a plurality of acquisition channels (AD acquisition channels) are stored into DDR memories by an FPGA in the multichannel data acquisition device 4, and each DDR4 memory group forms a double channel and is independently responsible for data input of 4 acquisition channels. The first DDR4 memory and the second DDR4 memory with the memory frequency of 2400MHz and the time sequence of CL-16-16-16-39 are selected, and the parallel data writing rate can reach more than 50 GB/s. The first-level high-speed data cache not only plays a role in cache, but also fully utilizes the advantage of high random reading performance of the DDR memory, and realizes real-time extraction and display of acquired data.

The multi-channel data collector 4 adopts PCIE 4.0x4 high-speed solid-state electronic disk as the second level data cache. 8 high-speed solid-state electronic discs are adopted to form a Raid 0 array, so that 8-channel parallel writing of high-speed data is realized, and the sequential writing speed exceeding 40GB/s is reached.

The data storage 5 is used as a final stage data storage warehouse, and needs to provide high-reliability and large-capacity data storage, so the data storage 5 used in the invention is a storage disk array, and comprises a second Raid card and a plurality of hard disks.

For example, 8 mechanical hard disks are adopted in a storage disk array to form a Raid10 array, so that 4-channel data parallel writing and 100% data backup are realized. The number of parallel writing channels can be dynamically adjusted according to actual needs, and 4 channels can provide the highest 24Gbps writing rate. And data exchange is carried out between the high-speed solid-state disk and the disk array by adopting multimode optical fibers.

In order to solve the problems of near-ground side lobe clutter interference and isolation between receiving and transmitting antennas of a data acquisition system, as shown in fig. 1, the engine auxiliary spectrum data acquisition device provided by the invention further comprises a wave absorbing plate 9. The wave absorbing plate 9 constitutes a first chamber for accommodating the transmitting antenna 1 and a second chamber for accommodating the receiving antenna 2.

To further ensure the real-time and accuracy of the reference frequency provided by the frequency source and the transmitted excitation signal, the feed source 8 employed in the present invention may comprise: the crystal oscillator, the first power divider, the first frequency multiplier, the second frequency multiplier, the third frequency multiplier, the second power divider, the third power divider, the fourth mixer, the fifth mixer, the first DDS, the second DDS and the fourth amplifier.

The crystal oscillator is connected with the first power divider. The first power divider is respectively connected with the multichannel data acquisition unit 4, the first amplifier, the third frequency multiplier, the second frequency multiplier and the first frequency multiplier. The first frequency multiplier is connected with the second power divider. The second power divider is connected with the first mixer and the fourth mixer respectively. The fourth mixer is connected with the fourth amplifier. The fourth amplifier is connected to the transmitter 6. The second frequency multiplier is connected with the third power divider. The third power divider is connected with the first DDS and the second mixer respectively. The first DDS is connected with the fifth mixer. The fifth mixer is connected with the fourth mixer. The tripler is connected with the second DDS. The second DDS is connected with the fifth mixer.

Based on the specific setting of the structure of the feed source 8, the frequency source frequency conversion link up-converts the baseband signal to the radio frequency signal through twice frequency conversion, and adopts the DDS to realize the frequency hopping source, thereby having the generating capability of step frequency and agile frequency conversion signals.

In addition, in order to monitor the signal of the receiving channel in real time, the engine auxiliary spectrum data acquisition device provided by the invention can be further provided with a spectrum analyzer 3. The spectrum analyzer 3 is connected to a multichannel receiver 7, respectively.

In summary, the engine auxiliary spectrum data acquisition device solves the problem of serious clutter interference and data loss caused by insufficient data storage bandwidth in an engine auxiliary spectrum data acquisition test, provides test support for acquisition of original data of engine auxiliary spectrum target characteristics, and can conveniently, quickly and efficiently realize omnibearing multi-angle data acquisition work of an engine auxiliary spectrum.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The scope of the embodiments of the present disclosure encompasses the full ambit of the claims, as well as all available equivalents of the claims. When used in this application, although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without changing the meaning of the description, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first element and the second element are both elements, but may not be the same element. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled person may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.

In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements may be merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. An engine secondary spectrum data acquisition device, which is characterized by comprising: a transceiver system and a storage system;

the transceiver system includes a multichannel receiver;

the storage system comprises a multichannel data collector and a data storage;

the multichannel receiver is connected with the multichannel data collector; the multichannel data collector is connected with the data memory;

the transceiver system further comprises: the system comprises a feed source, a transmitter, a transmitting antenna and a receiving antenna;

the feed source is respectively connected with the transmitter, the multichannel receiver and the multichannel data acquisition unit; the transmitter is connected with the transmitting antenna; the receiving antenna is connected with the multichannel receiver;

the multi-channel receiver includes a plurality of receive channels; each of the receive channels includes: the low-noise amplifier comprises a gating switch, a low-noise amplifier, a first mixer, a first filter, a second mixer, a second filter, an attenuator, a first amplifier, a power divider, a third mixer, a narrow-band filter, a broadband filter, a second amplifier and a third amplifier;

2. The engine secondary spectrum data acquisition device of claim 1, wherein the multi-channel data acquisition device comprises an FPGA, a first DDR4 memory, a second DDR4 memory, a first Raid card, a plurality of solid state disks, and a plurality of acquisition channels;

3. The engine secondary spectrum data acquisition device of claim 2, wherein the data storage comprises a second Raid card and a plurality of hard disks;

4. The engine secondary spectrum data acquisition device of claim 2, wherein the memory frequencies of the first DDR4 memory and the second DDR4 memory are 2400MHz; the timing sequence of the first DDR4 memory and the second DDR4 memory is CL-16-16-16-39.

5. The engine sub-spectrum data acquisition device of claim 1, further comprising a wave absorbing plate; the wave absorbing plate forms a first chamber for accommodating the transmitting antenna and a second chamber for accommodating the receiving antenna.

6. The engine secondary spectrum data acquisition device of claim 1, wherein the receiving antenna is a flat panel slot array antenna.

7. The engine sub-spectrum data acquisition device of claim 1, wherein the transmitting antenna is a lens antenna.

8. The engine sub-spectrum data acquisition device of claim 1, wherein the feed source comprises: the crystal oscillator, the first power divider, the first frequency multiplier, the second frequency multiplier, the third frequency multiplier, the second power divider, the third power divider, the fourth mixer, the fifth mixer, the first DDS, the second DDS and the fourth amplifier;