Portable radar radio frequency transceiving fault detection method and device

Abstract

The invention provides a portable radar radio frequency transceiving fault detection method, which belongs to the field of airborne radar testing, and comprises the following steps: setting a working mode and range information of a radar; collecting a radio frequency signal output by the radar, and judging whether the radio frequency signal output by the radar meets the normal working requirement of the radar or not; collecting low-frequency signals output by the radar, and judging whether the low-frequency signals output by the radar meet normal working requirements of the radar or not; setting radar target simulation parameters; generating a target signal; an echo signal is generated, and the echo signal is output to the radar; and receiving target information returned by the radar after receiving the echo signal, judging whether the target information is consistent, and counting a false alarm rate and a false alarm rate. According to the detection method, fault detection and fault diagnosis can be carried out on radar systems and subsystems of different models, radar echo signals are simulated, high-frequency and low-frequency signals of radars are rapidly detected, and the fault positioning, fault analysis and fault solving capabilities are improved.

Description

Technical Field

[0001] The invention belongs to the field of airborne radar testing, and in particular relates to a portable radar radio frequency transceiver fault detection method and equipment. Background Art

[0002] With the continuous improvement of radar functions and performance, the requirements for the detection of high-end equipment such as radar are getting higher and higher. After radars are delivered to customers in large quantities, the requirements for field support capabilities are getting higher and higher. For radar fault detection and diagnosis equipment, it is necessary to achieve a flexible combination of different test requirements and different test resources, to implement an open hardware framework system, and to design a portable fault detection and diagnosis platform based on a flat concept.

[0003] The existing radar fault detection technology uses NI's PXI chassis and controller, which integrates various commercial shelf test resource boards, etc. However, this is not truly portable. The universal test bus board resources do not cover some technical indicators of radar testing, and cannot cover the testing and fault diagnosis of target simulation, RF signals and low-frequency signals. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a portable radar RF transceiver fault detection method and equipment, which can complete the testing and fault analysis of product pulse signals, RF signals, and RF channels, and have the test data storage function; it has the delay function of controlling the RF signal through an interface, realizes the radar target simulation function, and is used for rapid fault diagnosis of radar systems in the field.

[0005] In order to achieve the above object, the present invention provides the following technical solution, a portable radar radio frequency transceiver fault detection method, the method comprising:

[0006] Set the radar's working mode and range information;

[0007] Collect the RF signal output by the radar and determine whether the frequency, power and spurious of the RF signal output by the radar meet the normal working requirements of the radar;

[0008] Collect the low-frequency signal output by the radar and determine whether the pulse width, period and amplitude of the low-frequency signal output by the radar meet the normal working requirements of the radar;

[0009] Set radar target simulation parameters;

[0010] According to the radar target simulation parameters and the low-frequency signal output by the radar, signal generation, signal delay, Doppler superposition and DA output are performed to generate the target signal;

[0011] According to the frequency of the radio frequency signal output by the radar, the target signal is up-converted to generate an echo signal, and the echo signal is output to the radar;

[0012] Receive the target information returned by the radar after receiving the echo signal, determine whether the received target information is consistent with the radar target simulation parameters, and calculate the false alarm rate and false alarm rate.

[0013] The frequency of the low-frequency signal is 10KHZ-400MHZ.

[0014] The portable radar radio frequency transceiver fault detection method provided by the present invention also has the following characteristics: the detection method also includes real-time monitoring and storage of the radar working status.

[0015] The portable radar radio frequency transceiver fault detection method provided by the present invention also has the following characteristics: the detection method also includes real-time monitoring and storage of the collected radio frequency signals and low-frequency signals output by the radar.

[0016] The portable radar radio frequency transceiver fault detection method provided by the present invention also has the following characteristics: the detection method also includes parameter interpretation, correlation interpretation, timing logic interpretation and error information prompting of the stored data.

[0017] The portable radar radio frequency transceiver fault detection method provided by the present invention also has the following characteristics: the detection method also includes displaying the target information returned by the radar.

[0018] The portable radar RF transceiver fault detection method provided by the present invention also has the following characteristics: the up-conversion of the target signal includes: filtering, multiple mixing, gain control, spurious suppression, modulation and attenuation design of the target signal.

[0019] Another object of the present invention is to provide a portable radar radio frequency transceiver fault detection device, which is used to implement the detection method as described in any of the above items.

[0020] The portable radar video transceiver fault detection device provided by the present invention also has the following characteristics: the detection device comprises:

[0021] Portable reinforced computer, used to integrate various functional modules and carry test software;

[0022] A signal generating unit, used for generating a target signal according to the radar target simulation parameters and the low-frequency signal output by the radar;

[0023] A frequency conversion and clock generation unit, used for up-converting the target signal into an echo signal;

[0024] A spectrum analyzer unit, used to collect and measure the RF signal output by the radar;

[0025] The oscilloscope unit is used to collect and measure the low-frequency signal output by the radar.

[0026] Beneficial Effects

[0027] The portable radar RF transceiver fault detection method provided by the present invention can perform fault detection and fault diagnosis on radar systems and subsystems of different models, simulate radar echo signals, and quickly detect high-frequency and low-frequency signals of radar. This method improves the fault location, fault analysis and fault resolution capabilities.

[0028] The portable radar RF transceiver fault detection device provided by the present invention eliminates the architecture of the traditional NI PXI e chassis, controller, and bulky oscilloscope and spectrum analyzer instruments, and realizes the portability of the truly integrated box design through the highly integrated test resources of the measurement and control platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A structural diagram of a portable radar radio frequency transceiver fault detection device provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the structure of a portable radar radio frequency transceiver fault detection device provided by an embodiment of the present invention;

[0032] Figure 3 A physical picture of a portable radar radio frequency transceiver fault detection device provided in an embodiment of the present invention;

[0033] Figure 4 This is a diagram of the test software architecture carried in the portable radar radio frequency transceiver fault detection device provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of a portable radar radio frequency transceiver fault detection device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and examples, but it should be noted that these implementation modes are not limitations of the present invention, and equivalent changes or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these implementation modes are all within the scope of protection of the present invention.

[0036] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0037] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0038] The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0039] An embodiment of the present invention provides a portable radar radio frequency transceiver fault detection method, the method comprising:

[0040] Set the radar's working mode and range information;

[0041] Collect the RF signal output by the radar and determine whether the frequency, power and spurious of the RF signal output by the radar meet the normal working requirements of the radar;

[0042] Collect the low-frequency signal output by the radar and determine whether the pulse width, period and amplitude of the low-frequency signal output by the radar meet the normal working requirements of the radar;

[0043] Set radar target simulation parameters;

[0044] According to the radar target simulation parameters and the low-frequency signal output by the radar, signal generation, signal delay, Doppler superposition and DA output are performed to generate the target signal;

[0045] According to the frequency of the radio frequency signal output by the radar, the target signal is up-converted to generate an echo signal, and the echo signal is output to the radar;

[0046] Receive the target information returned by the radar after receiving the echo signal, determine whether the received target information is consistent with the radar target simulation parameters, and calculate the false alarm rate and false alarm rate.

[0047] The frequency of the low-frequency signal is 10KHZ-400MHZ.

[0048] In some embodiments, the detection method also includes real-time monitoring and storage of the radar operating status.

[0049] In some embodiments, the detection method further includes real-time monitoring and storage of the collected radio frequency signals and low frequency signals output by the radar.

[0050] In some embodiments, the detection method further includes performing parameter interpretation, correlation interpretation, timing logic interpretation and error message prompting on the stored data.

[0051] In some embodiments, the detection method further includes displaying target information returned by the radar.

[0052] In some embodiments, up-converting the target signal includes filtering, multiple mixing, gain control, spurious suppression, modulation, and attenuation design on the target signal.

[0053] In some embodiments, the test software for implementing any of the above fault detection methods is also included. The test software is developed using cross-platform QT / C++ tools, using a unified software architecture, and integrating the oscilloscope unit and spectrum analyzer unit software in a unified software UI operation mode. Figure 4 shown.

[0054] The test software is developed using the cross-platform C++ graphical user interface program QT, adopts a unified software architecture and a unified software UI operation method, and integrates multiple functional modules such as signal monitoring, echo simulation, fault diagnosis, data storage, and report generation. When executing test tasks, the functional modules communicate with each other and collaborate to complete the radar RF transceiver fault diagnosis, analysis, and positioning tasks.

[0055] Signal monitoring: Control the spectrum analyzer and oscilloscope to monitor the RF signal and low-frequency signal output by the radar;

[0056] Echo simulation: Receive the target simulation parameters such as the working frequency, the starting distance, the stopping distance, the speed, and the power of each target input by the user, convert the target simulation parameters into echo signal parameters, control the signal generating unit to complete the target signal output, and control the frequency conversion and clock generating unit to up-convert the target signal output by the signal generating unit into an echo signal and output it to the radar;

[0057] Fault diagnosis: Supports the formulation of fault diagnosis rules based on historical fault data and a large amount of expert experience and knowledge, supports real-time monitoring of test data through the background fault diagnosis engine, realizes automatic diagnosis of fault information through various interpretation logics such as parameter interpretation, correlation interpretation, and timing logic interpretation, and reports fault information;

[0058] Data storage: built-in high-performance database, supporting real-time storage of test data;

[0059] Report generation: The test data of this system is stored in real time. The report generation module can capture historical test data from the database and generate a test report according to the specified report template.

[0060] In some embodiments, a portable radar radio frequency transceiver fault detection device is provided, such as Figure 1-5 As shown,

[0061] The detection equipment comprises:

[0062] Portable reinforced computer, used to integrate various functional modules and carry test software;

[0063] A signal generating unit, used for generating a target signal according to the radar target simulation parameters and the low-frequency signal output by the radar;

[0064] A frequency conversion and clock generation unit, used for up-converting the target signal into an echo signal;

[0065] A spectrum analyzer unit, used to collect and measure the RF signal output by the radar;

[0066] The oscilloscope unit is used to collect and measure the low-frequency signal output by the radar.

[0067] In some embodiments, the portable reinforced computer is a high-performance computer with 16GB memory, 1TB system SSD disk, 4TB NVME interface disk, 4 PXI e slot interfaces on the right side, integrated signal generation unit, frequency conversion and clock unit, spectrum analyzer unit and oscilloscope unit, and a low-capacity battery integrated inside for power supply. Two fans are integrated, with air intake from the right side of the front and air discharge from the right side of the back, to blow and dissipate air for the four PXI E boards inside. In addition, there are other peripherals such as Ethernet, USB, serial port, etc., and keyboard, computer screen, etc. are integrated, and the structural dimensions are 410mm×290mm×90mm.

[0068] In some embodiments, the signal generating unit is mainly used to generate the target signal, and the target signal frequency range covers the low frequency band of 10kHz to 400MHz and the high frequency band of 0.1 to 1.1GHz. The low frequency band signal generating module is based on the principle of pulse modulation phase-locked loop, and can only generate continuous wave and pulse modulation signals; the high frequency band signal generating module is composed of FPGA, DA and SDRAM, and uses the high real-time characteristics and powerful computing power of FPGA to complete signal delay, Doppler superposition and DA output, and generate continuous wave, pulse signal, linear frequency modulation signal and target echo signal, etc.

[0069] In some embodiments, the frequency conversion and clock generating unit respectively directly amplifies, filters, attenuates and outputs the 10kHz~1GHz signal generated by the signal generating unit, and converts the intermediate frequency signal output by the signal generating unit to a 0.9GHz~18GHz radio frequency band after multiple mixing and filtering; accepts the frequency and power control of the target to achieve comprehensive simulation of the radar frequency band, output power, etc.; provides various low phase noise clock reference sources required by the system through the "single-phase frequency locking + mixing + filtering + frequency multiplication" method, and can also receive external clock reference signals as reference sources.

[0070] In some embodiments, the spectrum analyzer unit adopts a 3U module in the form of a PXI e structure. The spectrum analyzer module has two signal hardware paths: a direct sampling channel and a frequency conversion channel. The direct sampling channel is used to process low-frequency signals and includes a pre-anti-aliasing low-pass filter and a variable gain amplifier. The main technical indicators are as follows: frequency range: 100kHz~20GHz; frequency stability: ≤±0.1ppm; RBW: 1Hz~10MHz; sweep rate: >100GHz / s (RBW=25kHz); displayed average noise level (DANL): ≤-158dBm / Hz (50MHz~20GHz); amplitude accuracy: ≤±2dB; real-time analysis bandwidth: ≤100MHz; operating temperature range: -40℃~+70℃.

[0071] In some embodiments, the oscilloscope unit uses the PXI e-5110 digital oscilloscope module of NI. The main technical indicators of the module are: sampling rate: 1GS / s; resolution: 8bit; bandwidth: 100MHz; input voltage: -20V~+20V; channels: 2.

[0072] The test implementation process of the software fault detection device provided in any of the above embodiments is as follows:

[0073] 1) The device is connected to the radar through a test cable;

[0074] 2) Start the device, test resource identification, and load the driver;

[0075] 3) Resource BIT;

[0076] The measurement and control platform needs to be self-tested before working to ensure that the measurement and control platform works normally, including: testing resources, CPU, memory, hard disk, etc., and performing self-tests.

[0077] 4) Detection and fault diagnosis;

[0078] 4.1) Provide radar transmission signal excitation and set channel, radar system, working mode, frequency, power and other parameters through software;

[0079] 4.2) Provide radar echo signals, and generate target signals for radar detection by setting the operating frequency, starting distance, stopping distance, speed, and power of each target;

[0080] 4.3) Test radar high frequency signal;

[0081] 4.4) Test radar low frequency signal;

[0082] 4.5) Set the radar's working mode and range information through software;

[0083] 4.6) Monitor the RF signal output by the radar through the signal monitoring module to obtain parameter information such as frequency, power, and spurious signals;

[0084] 4.7) Monitor the low-frequency signal output by the radar through the signal monitoring module to obtain parameter information such as pulse width, period, amplitude, etc.;

[0085] 4.8) The fault diagnosis module performs real-time monitoring, data processing, parameter interpretation, and correlation interpretation on the above-collected parameter information to complete the fault detection of the radar output function;

[0086] 4.9) Generate echo signals for radar detection by setting the operating frequency, starting distance, stopping distance, speed, power and other target simulation parameters;

[0087] 4.10) Receive target information returned by the radar after receiving the echo signal;

[0088] 4.11) The fault diagnosis module determines whether the received target information is consistent with the radar target simulation parameters, and reports false alarm information and false alarm information;

[0089] 5) Monitor the radar equipment through the data bus, and the software visualizes the communication data;

[0090] 6) One-click report generation;

[0091] After the test is completed, the test report data is automatically generated, and the fault details and causes are given, as well as suggestions for debugging and troubleshooting.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A portable radar radio frequency transceiver fault detection method, characterized in that: The method comprises: Set the radar's working mode and range information; Collect the RF signal output by the radar and determine whether the frequency, power and spurious of the RF signal output by the radar meet the normal working requirements of the radar; Collect the low-frequency signal output by the radar and determine whether the pulse width, period and amplitude of the low-frequency signal output by the radar meet the normal working requirements of the radar; Set radar target simulation parameters; According to the radar target simulation parameters and the low-frequency signal output by the radar, signal generation, signal delay, Doppler superposition and DA output are performed to generate the target signal; According to the frequency of the radio frequency signal output by the radar, the target signal is up-converted to generate an echo signal, and the echo signal is output to the radar; Receive the target information returned by the radar after receiving the echo signal, determine whether the received target information is consistent with the radar target simulation parameters, and calculate the false alarm rate and false alarm rate. The frequency of the low-frequency signal is 10KHZ-400MHZ.

2. The portable radar radio frequency transceiver fault detection method according to claim 1, characterized in that: The detection method also includes real-time monitoring and storage of the radar working status.

3. The portable radar radio frequency transceiver fault detection method according to claim 1, characterized in that: The detection method also includes real-time monitoring and storage of the collected radio frequency signals and low frequency signals output by the radar.

4. The portable radar radio frequency transceiver fault detection method according to claim 1, characterized in that: The detection method also includes parameter interpretation, association interpretation, timing logic interpretation and error information prompting of the stored data.

5. The portable radar radio frequency transceiver fault detection method according to claim 1, characterized in that: The detection method also includes displaying the target information returned by the radar.

6. The portable radar radio frequency transceiver fault detection method according to claim 1, characterized in that: The up-conversion of the target signal includes: filtering, multiple mixing, gain control, spurious suppression, modulation and attenuation design of the target signal.

7. A portable radar radio frequency transceiver fault detection device, characterized in that: The device is used to implement the detection method according to any one of claims 1 to 6.

8. The portable radar video transceiver fault detection device according to claim 7, characterized in that: The detection equipment comprises: Portable reinforced computer, used to integrate various functional modules and carry test software; A signal generating unit, used for generating a target signal according to the radar target simulation parameters and the low-frequency signal output by the radar; A frequency conversion and clock generation unit, used for up-converting the target signal into an echo signal; A spectrum analyzer unit, used to collect and measure the RF signal output by the radar; The oscilloscope unit is used to collect and measure the low-frequency signal output by the radar.

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