A multi-band reconfigurable navigation detection device

Abstract

This utility model discloses a multi-band reconfigurable navigation testing device, relating to the field of airborne navigation equipment testing technology. It includes a main unit housing, a power supply unit, a main unit, a slave unit, a microwave conditioning unit, and a transceiver antenna. The main unit housing is primarily used to install the corresponding hardware structural units. The power supply unit is used for charging / discharging control of the device. The main unit runs the operating system and performs display and main control functions through its peripheral interfaces. The slave unit is responsible for generating and processing the system's digital signals in real time. This multi-band reconfigurable navigation testing device can perform simulated testing of more than ten types of signals currently required for airborne navigation equipment testing on a single device, effectively solving the problems of high workload and complex operation in ground maintenance of airborne navigation equipment.

Description

Technical Field

[0001] This utility model relates to the field of airborne navigation equipment testing technology, specifically a multi-band reconfigurable navigation testing device. Background Technology

[0002] Airborne navigation equipment plays a crucial role in aircraft flight safety. Currently, aircraft are equipped with a wide variety of airborne navigation devices operating across diverse frequency bands. Single-function testing equipment cannot meet the comprehensive testing needs of these devices. Therefore, ground maintenance personnel must use multiple types of testing equipment to fully assess the aircraft's equipment status. Furthermore, the different operating methods of various airborne navigation devices lead to variations in the operation of these testing devices, further increasing the workload of ground maintenance personnel. To address these issues, this application proposes a multi-band reconfigurable navigation testing device. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In view of the shortcomings of the prior art, this utility model provides a multi-band reconfigurable navigation detection device, which solves the technical problems mentioned in the background.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a multi-band reconfigurable navigation and detection device, comprising a main unit housing, a power supply unit, a main unit, a slave unit, a microwave conditioning unit, and a transceiver antenna; the main unit housing is mainly used to install the corresponding hardware structure units; the power supply unit is used for charging / discharging control of the device; the main unit is used to run the operating system and complete the display function and main control function through its peripheral interface; the slave unit is responsible for completing the analog generation and real-time processing of the system's digital signals; the microwave conditioning unit and the transceiver antenna are used for frequency band switching, gain attenuation, and signal transmission of input and output signals.

[0007] Preferably, the main unit housing includes a panel, a shell, a cover, a touch LCD screen, a switch and peripheral buttons, and an internal fixing structure.

[0008] Preferably, the power supply unit includes a master unit, a slave unit, an independent power supply interface for the microwave conditioning unit, and a battery communication interface. The power supply interfaces in the power supply unit adopt a separate design. The master unit is powered on by default, and the slave unit and the microwave conditioning unit can be controlled to be turned on or off by the master unit to achieve power saving design. The analog power supply and digital power supply of the power supply unit are designed separately. The digital power supply part uses DC-DC to step up and down to provide the required voltage, and the analog part uses DC-DC plus LDO with high power supply rejection ratio to step down to provide the required voltage. The power-on timing control of the power supply is realized through the pin of PG of the power chip.

[0009] Preferably, the host unit includes an FPGA chip (containing an internal ARM hard-core processor), a USB interface, an Ethernet port, an audio interface, a display interface, a keyboard interface, and a memory interface. The FPGA chip is mainly used to run the Linux operating system, drive the display interface, and drive the system peripherals. The USB interface, Ethernet port, and other peripheral interfaces are mainly used to complete the system's external interaction and communication and control functions with the slave device. The host unit has built-in simple test mode program and expert test mode program, which can quickly complete the functional test of the airborne navigation device according to the tester's needs.

[0010] Preferably, the slave unit includes an FPGA chip (a pure logic chip containing a large amount of programmable logic resources) to implement the hardware peripherals required for signal transmission / reception and its corresponding driving circuits, and also includes a high-performance RF transceiver, a voice interface, a high-speed AD converter, and a high-speed DA converter. The FPGA chip is mainly used to complete the driving control of the peripheral chips on the slave unit, and can also use its internal logic resources to complete the analog generation, reception and demodulation of signals. The high-performance RF transceiver can be used to complete the transmission / reception of signals from 30MHz to 7GHz. The high-speed AD converter and high-speed DA converter are mainly used to supplement the transmission / reception of low-frequency signals that the high-performance RF transceiver cannot reach.

[0011] Preferably, the microwave conditioning unit includes a digitally controlled gain circuit, a frequency up / down converter module, a filter circuit, and a channel switching circuit, which are used to manage the signal path and perform frequency up / down conversion operations on the input and output signals. The input and output loop can be completed through channel switching to verify the functional status of the microwave conditioning unit. The microwave conditioning unit is equipped with a signal monitoring channel, which can monitor the signal status in real time during the power-on stage and during the testing process.

[0012] Preferably, the transceiver antenna includes four antennas: a metal rod antenna, a VHF glue rod antenna, an L / C band glue rod antenna, and a C-band microstrip antenna. The four antennas work together to cover the 2MHz-6GHz transceiver frequency band. During the test, the transceiver antennas only need to be installed on the host casing at the beginning of the test. There is no need to replace the antennas during the test. For different functions, the signal output at the corresponding function antenna port can be completed by switching functions in the operation interface.

[0013] Preferably, both the master unit and the slave unit are primarily controlled by FPGAs. Since FPGAs are reconfigurable and lose all internal operating information upon power-off, the FPGA devices are externally connected to non-volatile memory. The master unit has a built-in EMMC for storing the configuration information of both the master and slave FPGAs. The slave unit dynamically loads the configuration of the FPGA chip within the slave unit according to different testing requirements through the Select_MAP interface on the FPGA. Furthermore, the master unit and the slave unit communicate via a CHIP2CHIP interface between the FPGAs for data exchange / control bus mapping, thereby enabling high-speed control communication between the master and slave units.

[0014] (III) Beneficial Effects

[0015] The beneficial effects of this utility model are as follows:

[0016] This multi-band reconfigurable navigation testing device can simulate and test more than a dozen signals required for current airborne navigation equipment testing on a single device, effectively solving the problems of high workload and complex operation in ground maintenance of airborne navigation equipment. Furthermore, the hardware platform of this invention can transmit and receive signals from 100kHz to 7GHz, exhibiting strong functional scalability. By modifying the FPGA configuration file on the slave device, other signal functions besides navigation testing can be implemented without hardware modifications, including but not limited to signal spectrum detection and signal generation. Attached Figure Description

[0017] Figure 1 This is a block diagram of the system connection relationship of this utility model.

[0018] Figure 2 This is a system structure block diagram of this utility model.

[0019] Figure 3 This is a block diagram illustrating the functional extension implementation of this utility model.

[0020] Figure 4 This is a flowchart of the working mode of this utility model.

[0021] Figure 5This is a schematic diagram of the actual casing of the main unit of this utility model.

[0022] In the diagram: 1-Panel; 2-House; 3-Cover plate; 4-Touch LCD screen; 5-Switch and peripheral buttons; 6-Corner cover; 7-Battery and battery compartment assembly; 8-Power board heat dissipation; 9-Charging port; 10-RF port; 11-Tangle antenna; 12-Headphone jack; 13-Fan and air inlet; 14-Air outlet; 15-Main control board and driver board. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1-5 As shown, this utility model provides a technical solution: a multi-band reconfigurable navigation detection device, including a main unit housing, a power supply unit, a main unit, a slave unit, a microwave conditioning unit, and a transceiver antenna; the main unit housing is mainly used to install the corresponding hardware structure units; the power supply unit is used for charging / discharging control of the device; the main unit is used to run the operating system and complete the display function and main control function through its peripheral interface; the slave unit is responsible for completing the analog generation and real-time processing of the system's digital signals; the microwave conditioning unit and transceiver antenna are used for frequency band switching, gain attenuation, and signal transmission of input and output signals. The main unit housing includes a panel 1, a shell 2, and a cover plate 3. The front, middle, and rear connections of the panel 1, shell 2, and cover plate 3 form the main unit housing. A touch LCD screen 4, a switch, and peripheral buttons 5 are installed on the panel 1. The internal fixed structure includes a casing. The components include a corner cover 6, a battery and battery compartment assembly 7, a power supply heat sink 8, a charging port 9, an RF port 10, a telescopic antenna 11, an earphone jack 12, a fan and air inlet 13, an air outlet 14, and a main control board and driver board 15. The corner cover 6 protects the corners of the panel 1, housing 2, and cover 3. The battery and battery compartment assembly 7, power supply heat sink 8, charging port 9, RF port 10, telescopic antenna 11, earphone jack 12, fan and air inlet 13, air outlet 14, main control board, and driver board 15 are all installed inside the housing 2. The battery and battery compartment assembly 7, power supply heat sink 8, and charging port 9 constitute the power supply unit. The charging port 9 is used to charge the battery and battery compartment assembly 7. The main control board and driver board 15 serves as the host unit, slave unit, and microwave conditioning unit. The telescopic antenna 11 is the transceiver antenna. The fan and air inlet 13 and air outlet 14 are used for cooling the device.

[0025] In practical applications, the host unit uses Fudan Microelectronics' FMQL series heterogeneous FPGA as the main control chip. Internally, it contains four ARM Cortex-A7 hard cores as the main control for system operation, and also includes some logic resources for controlling peripheral interfaces, such as... Figure 2 The interface includes a USB interface, Ethernet interface, eMMC interface, QSPI Flash interface, screen display interface, keyboard interface, Select_MAP program loading interface between master and slave units, and CHIP2CHIP logical resource mapping interface. The ARM hard core is primarily used to run the Linux operating system. The USB interface is mainly used for storing and exporting internal system test data. The Ethernet interface is used for system debugging and firmware upgrades. The eMMC interface connects to the onboard eMMC device, stores the Linux file system, and also stores the firmware for different test functions of the slave unit. QSPI... The Flash interface stores the boot entries for system startup; the screen display interface uses a touchscreen design, allowing direct input of system test parameters via the touchscreen; the keyboard interface assists in inputting system test parameters, enabling input of all test parameters via the keyboard when touchscreen issues arise; the Select_MAP program loading interface loads the FPGA firmware of the slave unit, ensuring complete decoupling of master and slave unit processing logic; each test function has a separate slave FPGA firmware stored in the EMMC on the master unit, which is only read from the master unit's FPGA when a specific test function is enabled, and then loaded onto the slave unit's FPGA via the Select_MAP interface. This enables dynamic loading of different functions. The CHIP2CHIP interface is a high-speed data control interface for logic mapping between FPGAs. Communication between the master unit and the slave unit mainly relies on this interface. The functional test unit of the slave unit is mapped to the master unit through this interface, acting as an AXI4 slave device. In addition, through this decoupling design of the master unit and the slave unit, the master unit can replace only the single-function test firmware without affecting the existing functions during the use of the device, which improves the stability of the system during function upgrades. Moreover, when other function test requirements need to be added later, the system function expansion can be completed smoothly and safely by only updating the firmware of the slave unit.

[0026] Furthermore, the slave unit includes an FPGA chip, the hardware peripherals required for signal transmission / reception, and their corresponding driver circuits, including a high-performance RF transceiver, audio interface, high-speed AD converter, and high-speed DA converter. The slave unit uses Fudan Microelectronics' JFM7 series FPGA as the master control chip, which contains abundant logic resources and can be used to implement complex digital logic circuits. In this application, this FPGA chip is mainly used to run the logic algorithm implementation of the test function cases and includes some peripheral interface control required for signal reception / transmission, such as... Figure 2 As shown, the system includes a high-performance RF transceiver, a voice CODEC interface, a high-speed ADC, and a high-speed DAC. The high-performance RF transceiver, specifically the CX9261A model from the domestic manufacturer Chengxin Technology, is used to transmit and receive RF signals. It can transmit and receive signals required for navigation function testing, operating in the 30MHz-7GHz frequency band, covering most of the frequency bands used by airborne navigation equipment. The high-speed ADC and high-speed DAC are used to supplement the low-frequency signal transmission / reception capabilities that the high-performance RF transceiver cannot reach. The voice CODEC interface is used for voice signal acquisition and reception. The output is processed by the device through an external microphone or headphones (i.e., headphone jack 12). In addition to the above hardware peripherals, the most important interfaces on the slave unit are the Select_MAP interface and CHIP2CHIP interface, which are interconnected with the host unit. Through these two interconnection interfaces, the slave unit can be regarded as a functional peripheral of the host unit. When switching between different functional test requirements, it is only necessary to complete the firmware loading and system control through the interconnection interface to easily switch the algorithm implementation logic unit inside the slave unit, treating each test function as an independent APP application, so that it can be switched as needed.

[0027] The microwave conditioning unit mainly includes circuits for signal frequency band switching, gain attenuation, and up / down conversion. Its main function is to perform power control and channel matching on the signals input / output of the slave unit to ensure that they are input / output at the corresponding antenna ports.

[0028] The transceiver antenna unit mainly includes four sets of transceiver antennas: a metal rod antenna, a VHF band glue rod antenna, an L / C band glue rod antenna, and a C-band microstrip antenna. The metal rod antenna (rod antenna 11) adopts a folding design and can be installed at the corresponding position of the housing 2 for easy storage. The C-band microstrip antenna adopts an embedded design and is directly embedded in the main unit housing, which can be used without installation. The VHF glue rod antenna and the L / C band glue rod antenna can be installed on their corresponding TNC interfaces during use. Through this frequency division design of the antenna interface, the navigation function test of the entire frequency band can be performed directly after the antenna is installed once during the use of the equipment, which greatly reduces the burden on ground test and maintenance personnel.

[0029] The power supply interface in the power supply unit adopts a separate design. The host unit is powered on by default, and the slave unit and microwave conditioning unit can be controlled to be turned on or off by the host unit. Through this power saving design, the device can achieve a long battery life. The analog power supply and digital power supply of the power supply unit are designed separately. The digital power supply part uses DC-DC to step up and down to provide the required voltage, and the analog part uses DC-DC plus LDO with high power supply rejection ratio to step down to provide the required voltage. The power-on timing is controlled by the pin of PG of the power chip.

[0030] This invention, through the aforementioned hardware and software design, realizes simulated functional testing of various navigation signals, including but not limited to the following functions: instrument landing function test, microwave landing function test, beacon function test, VOL function test, TACAN function test, rangefinder function test, radio compass function test, air traffic control transponder function test, shortwave plaintext communication test, VHF plaintext communication test, ACARS VHF data link function test, etc. Furthermore, due to the high degree of hardware flexibility, this invention can, while implementing the above functions, complete more signal transmission / reception tests by loading extended functional test firmware, including but not limited to: spectrum detection function, signal source function, radio interference source function, etc.

[0031] To facilitate equipment operation by ground maintenance personnel, this utility model adds simplified and expert operation modes to the testing operations of various functions, such as... Figure 4 As shown; after entering the functional test interface, you can select the test mode through the operation interface. The simple mode can load commonly used test points in ground maintenance, simplifying the operation process of maintenance personnel and allowing you to start the test with one click; the expert mode opens up greater operability for the functional test mode, allowing you to test almost all test parameters, giving the functional test a great deal of freedom.

[0032] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, for example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components or an interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-band reconfigurable navigation detection device, characterized by: It includes the main unit casing, power supply unit, main unit, slave unit, microwave conditioning unit, and transceiver antenna; The main unit casing is primarily used to install the corresponding hardware structural units; The power supply unit is used for charging / discharging control of the device; The host unit is used to run the operating system and completes display and main control functions through its peripheral interfaces. The slave unit is responsible for generating and processing the system's digital signals in real time. The microwave conditioning unit and transceiver antenna are used for frequency band switching, gain attenuation, and signal transmission of input and output signals.

2. The multi-band reconfigurable navigation detection device of claim 1, wherein: The main unit casing includes a panel, a housing, a cover, a touch LCD screen, a switch and peripheral buttons, and an internal fixing structure.

3. The multi-band reconfigurable navigation detection device of claim 1, wherein: The power supply unit adopts an independent power supply design for the master unit, slave unit, and microwave conditioning unit. The master unit is turned on by default upon power-on, and the slave unit and microwave conditioning unit can be turned on or off by the master unit. The analog power supply and digital power supply of the power supply unit are designed separately. The digital power supply part uses DC-DC converters to step up and down to provide the required voltage, while the analog part uses DC-DC converters with LDOs that have a high power supply rejection ratio to step down to provide the required voltage.

4. The multi-band reconfigurable navigation detection device according to claim 1, characterized in that: The host unit includes an FPGA chip and some peripheral driver interface circuits required for device operation, including a USB interface, an Ethernet port, an audio interface, a display interface, a keyboard interface, and a memory interface.

5. The multi-band reconfigurable navigation detection device according to claim 1, characterized in that: The slave unit includes an FPGA chip, hardware peripherals required for signal transmission / reception, and corresponding driver circuits, including a high-performance RF transceiver, an audio interface, a high-speed AD converter, and a high-speed DA converter.

6. The multi-band reconfigurable navigation detection device according to claim 1, characterized in that: The microwave conditioning unit includes a digitally controlled gain circuit, a frequency up / down conversion module, a filter circuit, and a channel switching circuit. It is used to manage the signal path of the input and output signals and perform frequency up / down conversion operations. The channel switching is used to complete the input and output loop of the signal to verify the functional status of the microwave conditioning unit.

7. The multi-band reconfigurable navigation detection device according to claim 1, characterized in that: The transceiver antennas include a metal rod antenna, a VHF band glue rod antenna, an L / C band glue rod antenna, and a C-band microstrip antenna, and the four antennas work together to cover the 2MHz-6GHz transceiver frequency band.

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