Reconnaissance load for light and small unmanned aerial vehicle, unmanned aerial vehicle device and data processing system

Abstract

The invention particularly relates to a reconnaissance load for a light and small unmanned aerial vehicle. The reconnaissance load comprises a broadband receiving antenna, a receiving front end and a signal processing rear end which are connected in sequence, the broadband receiving antenna is used for receiving a space electromagnetic signal; the receiving front end is used for performing front-end processing on the space electromagnetic signal to obtain a corresponding digital signal; the signal processing rear end is used for carrying out signal sorting processing on the digital signals and sending sorted feature data to the signal processing background; the receiving front end is provided with a radio frequency analog digital hybrid integrated microsystem, and a signal amplification module, a secondary frequency conversion module, an intermediate frequency amplification filtering module, a sampling module, a frequency synthesis module and a reference clock are packaged in the receiving front end; the signal amplification module, the secondary frequency conversion module, the intermediate frequency amplification filtering module and the sampling module are connected in sequence; the frequency synthesis module is connected with the reference clock, the sampling module and the secondary frequency conversion module. According to the scheme, the investigation load is light in weight, low in cost, low in power consumption and high in applicability.

Description

Technical Field

[0001] The present invention relates to the field of radar detection technology, and in particular to a reconnaissance payload for a light and small unmanned aerial vehicle, an unmanned aerial vehicle device and a data processing system. Background Art

[0002] In related technologies, small and light UAVs are flexible and easy to conceal, and can be used to detect and monitor the electromagnetic environment of a designated area. As mission equipment on the UAV, the reconnaissance payload can obtain the location and electromagnetic information of radiation source targets such as radars and communication links, thereby providing data support for the reconnaissance and monitoring of targets in the battlefield environment.

[0003] Existing reconnaissance payloads are generally large in size, weight, and power consumption; they cannot meet the performance requirements for stealth.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The present invention provides a reconnaissance payload, a UAV device and a data processing system for a light and small UAV, which can provide a lightweight, low-cost, low-power consumption and highly applicable reconnaissance payload, thereby effectively overcoming the defects existing in the prior art to a certain extent.

[0006] Other features and advantages of the present invention will become apparent from the following detailed description, or may be learned in part by practice of the present invention.

[0007] According to a first aspect of the present invention, there is provided a reconnaissance payload for a light and small unmanned aerial vehicle, comprising: a broadband receiving antenna, a receiving front end and a signal processing back end connected in sequence; wherein the broadband receiving antenna is used to receive space electromagnetic signals; the receiving front end is used to perform front-end processing on the space electromagnetic signals and obtain corresponding digital signals; the signal processing back end is used to perform signal sorting processing on the digital signals and send the sorted pulse feature data to the signal processing back end;

[0008] Among them, the receiving front end is provided with a radio frequency analog digital hybrid integrated microsystem, and the radio frequency analog digital hybrid integrated microsystem encapsulates a signal amplification module, a secondary frequency conversion module, an intermediate frequency amplification and filtering module, a sampling module, a frequency synthesis module, and a reference clock; the signal amplification module, the secondary frequency conversion module, the intermediate frequency amplification and filtering module, and the sampling module are connected in sequence; the frequency synthesis module is respectively connected to the reference clock, the sampling module, and the secondary frequency conversion module.

[0009] In some exemplary embodiments, the radio frequency analog digital hybrid integrated microsystem includes a multi-layer high temperature ceramic carrier, and the chip devices corresponding to the signal amplification module, the secondary frequency conversion module, the intermediate frequency amplification and filtering module, the sampling module, the frequency synthesis module, and the reference clock are packaged on the multi-layer high temperature ceramic carrier;

[0010] The chip device is covered with a heat dissipation cover plate and fixed on the multi-layer high-temperature ceramic carrier; an elastic heat-conductive material layer for heat dissipation is arranged between the inner side of the heat dissipation cover plate and the chip device;

[0011] The high temperature ceramic carrier board is welded on the printed circuit board.

[0012] In some exemplary embodiments, the broadband receiving antenna is a discone antenna;

[0013] A hemispherical protective cover is arranged on the outer side of the disc-cone antenna.

[0014] In some exemplary embodiments, the protective cover is disposed on a front end housing, and the front end housing is fixed to a rear end housing;

[0015] The receiving front end is arranged in the front end housing; the signal processing back end is arranged in the back end housing.

[0016] According to a second aspect of the present invention, there is provided a drone device, comprising: a drone body;

[0017] The drone body is equipped with a reconnaissance payload for a light and small drone as described in the first aspect;

[0018] The drone body is provided with a wireless air interface module for data communication with a signal processing background.

[0019] According to a third aspect of the present invention, there is provided a data processing system, comprising:

[0020] A plurality of drone devices as described in the second aspect, used to send pulse signals to a signal processing background;

[0021] The signal processing background is used to receive the pulse signals sent by each drone device, and combine and process the pulse signals corresponding to the target airspace to obtain the characteristic data of the target airspace.

[0022] The reconnaissance payload for light and small UAVs provided in the embodiments of the present invention utilizes a broadband receiving antenna to receive space electromagnetic signals; performs front-end processing on the space electromagnetic signals through the receiving front end, and obtains the corresponding digital signals; performs signal sorting processing on the digital signals using the signal processing back end, and sends the sorted feature data to the signal processing back end. By setting up an RF analog-digital hybrid integrated microsystem for the receiving front end, the internal RF transmission loss can be effectively reduced, thereby reducing the system power consumption. By setting up the antenna, receiving front end and signal processing back end in a modular manner, the integrated design of the reconnaissance payload can be realized, making the structure of the reconnaissance payload more compact, thereby reducing the size and weight of the UAV, and effectively reducing the wind resistance of the UAV flight.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification are used to explain the principles of the present invention. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0025] Figure 1 A schematic diagram of a module structure of a reconnaissance payload for a light and small UAV according to an exemplary embodiment of the present invention is schematically shown;

[0026] Figure 2 A schematic diagram schematically illustrates a working principle flow of a reconnaissance payload in an exemplary embodiment of the present invention;

[0027] Figure 3 A schematic diagram schematically shows a chip structure of a receiving front end in an exemplary embodiment of the present invention;

[0028] Figure 4 A schematic diagram schematically illustrates the appearance structure of a reconnaissance payload for a light and small UAV in an exemplary embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the structure of a drone device in an exemplary embodiment of the present invention is schematically shown;

[0030] Figure 6 The structure diagram of a data processing system in an exemplary embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0031] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0032] In addition, the accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and their repeated description will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0033] In the relevant technology, the reconnaissance payload used for passive positioning has a strong battlefield stealth capability, which requires the reconnaissance payload to be miniaturized and low-power. In addition, as a consumable resource, drones often need to work in formation, which requires the reconnaissance payload to have the characteristics of low cost and good consistency. Therefore, there is a need for a highly integrated reconnaissance payload suitable for light and small drones.

[0034] In view of the shortcomings and deficiencies of the prior art, this exemplary embodiment provides a reconnaissance payload for a light and small UAV, which can be applied to a light and small UAV. Figure 1 As shown, the reconnaissance payload for a light and small UAV includes: a broadband receiving antenna 11, a receiving front end 12 and a signal processing back end 13 connected in sequence. Among them, the broadband receiving antenna 11 can be used to receive space electromagnetic signals; the receiving front end 12 can be used to perform front-end processing on the space electromagnetic signals and obtain corresponding digital signals; the signal processing back end 13 can be used to perform signal sorting processing on the digital signals and send the sorted feature data to the signal processing back end.

[0035] Exemplarily, the broadband receiving antenna 11 can adopt a disc-cone antenna. Specifically, the disc-cone antenna can be composed of a conductor disk and a conductor cone. The center of the conductor disk is connected to the inner conductor of the feeding coaxial cable, and the top of the cone is connected to the outer conductor of the coaxial cable. The specific structure of the disc-cone antenna adopts the existing structure, and the specific structure of the disc-cone antenna is not repeated in the present invention. By using the disc-cone antenna, the reception of omnidirectional spatial electromagnetic signals can be achieved.

[0036] Exemplary, reference Figure 4As shown, a hemispherical protective cover 41 is arranged outside the disc-cone antenna. The protective cover is arranged on the front end housing 42, and the front end housing 42 is fixed on the rear end housing 43. Among them, the receiving front end is fixedly arranged in the front end housing; the signal processing rear end is fixedly arranged in the rear end housing.

[0037] By sequentially arranging a protective cover 41, a front end shell 42 and a rear end shell 43 from top to bottom, and fixing the antenna, the receiving front end and the signal processing rear end in the corresponding shells, and arranging a hemispherical antenna protective cover, and arranging the protective cover on the front end shell, the payload shape can be designed in an integrated manner, the structure is compact and the volume of the reconnaissance payload is reduced, thereby effectively reducing the wind resistance of the UAV flight.

[0038] In this exemplary embodiment, the receiving front end may be provided with a radio frequency analog digital hybrid integrated microsystem. Figure 2 As shown, the radio frequency analog digital hybrid integrated microsystem is encapsulated with a signal amplification module 21, a secondary frequency conversion module 22, an intermediate frequency amplification and filtering module 23, a sampling module 24, a frequency synthesis module 25, and a reference clock 26. Among them, the signal amplification module 21, the secondary frequency conversion module 22, the intermediate frequency amplification and filtering module 23, and the sampling module 24 are connected in sequence; the frequency synthesis module 25 is respectively connected to the reference clock 26, the sampling module 24, and the secondary frequency conversion module 22.

[0039] Specifically, the signal amplification module 21 can be used to pre-select and amplify the received broadband RF signal. The amplified RF signal is frequency-converted twice using a secondary frequency conversion module to be converted into a narrowband intermediate frequency signal. The sampling module can perform analog / digital signal multi-channel parallel sampling on the narrowband intermediate frequency signal and convert it into a digital signal. The sampling module can convert the digital signal into high-speed serial data and transmit it to the back-end signal processing back-end 13 through a high-speed interface for signal sorting. Among them, the reference clock 26 is used to provide a reference clock signal to the frequency synthesis module; the frequency synthesis module can be a frequency synthesizer, which generates a local oscillator signal based on the reference clock signal, and provides the local oscillator signal to the sampling module and the secondary frequency conversion module.

[0040] Exemplary, reference Figure 3 As shown, the radio frequency analog digital hybrid integrated microsystem includes a multi-layer high-temperature ceramic carrier 31, and the signal amplification module, secondary frequency conversion module, intermediate frequency amplification and filtering module, sampling module, frequency synthesis module and each chip device 34 corresponding to the reference clock are packaged on the multi-layer high-temperature ceramic carrier 31 by silicon-based packaging. The chip device 34 is covered with a heat dissipation cover plate 32 as a whole and fixed on the multi-layer high-temperature ceramic carrier 31; an elastic thermal conductive material layer 33 for heat dissipation is provided between the inner side of the heat dissipation cover plate 32 and each chip device 34. The high-temperature ceramic carrier 31 is soldered on the printed circuit board through solder balls 36.

[0041] Exemplarily, the chip device can use a wafer-level silicon-based packaging core. Specifically, a multi-layer high-temperature ceramic carrier can be used as a packaging carrier, and a wafer silicon-based packaging core is welded on the top, and the silicon-based packaging core encapsulates the chip inside the silicon substrate. The use of silicon-based materials can provide good heat dissipation, and semiconductor wiring technology can achieve high-density integration. The multi-layer high-temperature ceramic carrier can provide signal interconnection between cores, and the multi-layer wiring structure can achieve good isolation of different types of signals. The multi-layer high-temperature ceramic carrier is used as a secondary carrier to redistribute BGA (Ball Grid Array Package) solder joints, providing a physical interface between the hybrid integrated microsystem and the printed circuit board.

[0042] The capping structure of the integrated microsystem module is to place a heat dissipation cover plate 32 on the top of the silicon-based package core particle of the wafer. The heat dissipation cover plate 32 has support columns at the four corners and is bonded to the multi-layer high-temperature ceramic carrier plate 31 with a conductive structural adhesive 32. The heat dissipation cover plate 32 plays the role of electromagnetic shielding and material protection. An elastic thermal conductive material layer is arranged inside the heat dissipation cover plate. The thermal conductive material is tightly attached to the top of the silicon-based package core particle, which plays a good heat dissipation role for the silicon-based package core particle. The multi-layer high-temperature ceramic carrier plate 31 is also equipped with a passive capacitor 35.

[0043] Exemplarily, the signal processing backend can obtain the digital signal sent by the receiving frontend through a high-speed interface and perform signal sorting processing on the digital signal. Specifically, it can be to perform intra-pulse analysis on the digital signal, describe each pulse with a pulse description word (Pulse Discreption Word, PDW), and send the PWD signal to the signal processing backend.

[0044] For example, a PWD signal may generally include one or more of the following features: (1) Time of arrival (TOA): indicates the transmission time of the pulse signal, which can be used to calculate the pulse repetition interval (PRI); (2) Angle of arrival (DOA): indicates the angle of signal arrival, which is used to characterize the location information of the radiation source; (3) Carrier frequency (CF): indicates the frequency of the radar signal, including frequency agility and frequency diversity; (4) Pulse width (PW): indicates the duration of the pulse signal; (5) Pulse amplitude (PA): indicates the strength of the pulse signal; (6) Pulse modulation (PM): indicates the modulation method of the pulse signal, such as linear frequency modulation.

[0045] After receiving the PWD signal, the signal processing background can sort out different radar pulse signals according to frequency characteristics, pulse width characteristics, amplitude characteristics, etc., and summarize the PDW signals of multiple drones in the same airspace, so as to perform information processing such as passive positioning of the target and electromagnetic feature collection.

[0046] For example, the signal processing backend can be an electronic device for signal processing, and embedded soft-core processor technology can be used. The signal processing backend can include a field programmable gate array (FPGA) circuit and a processor soft core embedded in the FPGA; in addition, it can also include a memory and a high-speed interface. The memory can be used to store received digital signals, as well as pulse signals obtained after pulse sorting, or PWD signals. Among them, the signal processing backend builds a processor based on the general logic of the programmable logic device FPGA, and can modify certain functions of the processor CPU according to application requirements to achieve performance optimization of the signal processing backend. By easily configuring an external high-speed interface inside the FPGA, the collaborative work of software and hardware can be achieved, ensuring system performance while increasing system flexibility.

[0047] Exemplarily, the signal processing backend may provide a mode configuration module for configuring different working parameters according to different application scenarios. For example, the application scenario may be dynamic / static target tracking, ground target identification, electromagnetic signal acquisition, etc. For different application scenarios, the power consumption level of the load front end, the characteristic type of PWD signal transmission, etc. may be pre-configured.

[0048] In this embodiment, a drone device is provided. Figure 5 As shown, the UAV device can be a small-sized UAV, including a UAV body 51; the UAV body is equipped with a reconnaissance payload 52 for a small-sized UAV as described in the above embodiment; the UAV body is provided with a wireless air interface module (not shown in the figure) for data communication with the signal processing background. The specific structure and corresponding working mode of the reconnaissance payload 52 have been described in detail in the above embodiment, and will not be repeated here.

[0049] In this example implementation, reference Figure 6 As shown, a data processing system is provided, which may include several drone devices 61 as described in the above embodiment, and a signal processing background 62. Among them, each drone device can receive electromagnetic signals in the area, convert the electromagnetic signals into corresponding digital signals, and then perform signal sorting processing on the digital signals to generate corresponding PWD signals, and send the PWD signals to the signal processing background through the wireless air interface module. The signal processing background can receive PWD signals fed back by multiple drone devices. According to one or more of the frequency characteristics, pulse width characteristics, amplitude characteristics, and pulse modulation methods in the PWD signals, the PWD signals are classified and summarized, so that the radars corresponding to the same target can be combined; and then it can be used for passive positioning of the target, electromagnetic feature collection, target tracking, identification, etc.

[0050] The reconnaissance payload for light and small UAVs provided by the present invention adopts a broadband disc-cone antenna and an integrated design of the payload shape, so that the reconnaissance payload structure is compact and the wind resistance of the UAV flight is effectively reduced. By adopting hybrid integrated microsystem integration technology at the receiving front end, the internal RF transmission loss is effectively reduced, thereby reducing the system power consumption. By adopting soft-core processor technology at the signal processing back end, different working parameters can be configured according to different application scenarios to achieve multi-machine collaborative work.

[0051] It should be noted that the above figures are only schematic illustrations of the processes included in the apparatus according to exemplary embodiments of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0052] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to an embodiment of the present invention, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0053] The units involved in the embodiments of the present invention may be implemented by software or by a combination of hardware and software, and the units described may also be arranged in a processor. The names of these units do not, in some cases, limit the units themselves.

[0054] Other embodiments of the invention will readily occur to those skilled in the art after considering the specification and practicing the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0055] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A reconnaissance payload for a light and small UAV, characterized in that: include: A broadband receiving antenna, a receiving front end and a signal processing back end connected in sequence; wherein the broadband receiving antenna is used to receive space electromagnetic signals; the receiving front end is used to perform front-end processing on the space electromagnetic signals and obtain corresponding digital signals; the signal processing back end is used to perform signal sorting processing on the digital signals and send the sorted feature data to the signal processing back end; Among them, the receiving front end is provided with a radio frequency analog digital hybrid integrated microsystem, and the radio frequency analog digital hybrid integrated microsystem encapsulates a signal amplification module, a secondary frequency conversion module, an intermediate frequency amplification and filtering module, a sampling module, a frequency synthesis module, and a reference clock; the signal amplification module, the secondary frequency conversion module, the intermediate frequency amplification and filtering module, and the sampling module are connected in sequence; the frequency synthesis module is respectively connected to the reference clock, the sampling module, and the secondary frequency conversion module.

2. The reconnaissance payload for a light and small UAV according to claim 1 is characterized in that: The radio frequency analog digital hybrid integrated microsystem comprises a multi-layer high temperature ceramic carrier, and the chip devices corresponding to the signal amplification module, secondary frequency conversion module, intermediate frequency amplification and filtering module, sampling module, frequency synthesis module, and reference clock are packaged on the multi-layer high temperature ceramic carrier; The chip device is covered with a heat dissipation cover plate and fixed on the multi-layer high-temperature ceramic carrier; an elastic heat-conductive material layer for heat dissipation is arranged between the inner side of the heat dissipation cover plate and the chip device; The high temperature ceramic carrier board is welded on the printed circuit board.

3. The reconnaissance payload for a light and small UAV according to claim 1 is characterized in that: The broadband receiving antenna is a discone antenna; A hemispherical protective cover is arranged on the outer side of the disc-cone antenna.

4. The reconnaissance payload for a light and small UAV according to claim 3 is characterized in that: The protective cover is arranged on the front end housing, and the front end housing is fixed on the rear end housing; The receiving front end is arranged in the front end housing; the signal processing back end is arranged in the back end housing.

5. A drone device, characterized in that: include: The drone itself; The drone body is equipped with a reconnaissance payload for a light and small drone as described in any one of claims 1 to 4; The drone body is provided with a wireless air interface module for data communication with the signal processing background.

6. A data processing system, characterized in that: include: A plurality of drone devices as claimed in claim 5, used to send pulse signals to a signal processing background; The signal processing background is used to receive the pulse signals sent by each drone device, and combine and process the pulse signals corresponding to the target airspace to obtain the characteristic data of the target airspace.

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