CN116087902A

CN116087902A - Radar rapid comprehensive detection equipment and method based on hybrid bus

Info

Publication number: CN116087902A
Application number: CN202310365805.5A
Authority: CN
Inventors: 韩博峰; 朱亮宇; 纪丽华; 曹庆刚
Original assignee: Nanjing Leading Information Technology Co ltd
Current assignee: Nanjing Leading Information Technology Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-05-09

Abstract

The invention discloses a radar rapid comprehensive detection device and a radar rapid comprehensive detection method based on a hybrid bus, wherein the device comprises a detection device host, an antenna, a bracket and a cable, wherein the host comprises a controller based on PXI bus communication, a signal source component, a signal analyzer component, an oscilloscope component, a digital multimeter component, a microwave switch module, an intermediate frequency switch module, a matrix switch module, a serial port communication module, a 1553B bus communication module, an internal bus communication module, a radar target simulator module, an interface adapter plate provided with a connecting cable with an airborne radar and the like. The invention uses the modularized design, has small equipment volume and light weight, is convenient for carrying and using in the external field, can rapidly detect the comprehensive functions of the radars of different systems of various models, performs data interaction and communication in different bus forms between the detection equipment and the radars, acquires the self-detection information in the radars for auxiliary detection while detecting, and improves the detection speed and accuracy of the radars.

Description

Radar rapid comprehensive detection equipment and method based on hybrid bus

Technical Field

The invention relates to the technical field of radar detection, in particular to a rapid comprehensive radar detection device and method based on a hybrid bus, which are used in an external field wide temperature environment.

Background

Radar plays an increasingly important role in modern war, and various countries now pay more attention to development of radar technology and radar security equipment, and radar detection equipment has an increasingly heavy duty in the field of electronic equipment. The rapid detection aiming at radar is not only a combat guarantee means, but also becomes an important combat means for influencing war. The radar fast comprehensive detection equipment is a real-time automatic test system which is composed of a plurality of subsystems, and the system can be used for fast detecting various functions and performances such as frequency domain characteristics, time domain characteristics, target searching and tracking characteristics, instruction guidance functions, communication functions and the like of a C\X\Ku waveband radar signal.

The current army daily training and flight test tasks are busy, and the army increasingly attaches importance to the research and development of various kinds of guarantee equipment to be close to the actual combat application scene, so that the radar rapid comprehensive detection equipment is required to be simple in operation, rapid and accurate in test and stable and reliable in performance. Most of traditional detection equipment relies on partial universal instruments or customized equipment to detect main functions or main indexes of the radar, and the defects of low practicality, more time consumption, difficult unification of test data, more test flows, complex test item operation, low equipment integration level and the like exist, so that the existing army training and guaranteeing requirements cannot be met.

Disclosure of Invention

The invention aims to: aiming at the technical problems, the invention provides a radar rapid comprehensive detection device and method based on a hybrid bus, which can adapt to an external field wide-temperature environment and realize rapid comprehensive detection of a C\X\Ku waveband radar based on the hybrid bus.

The invention comprises the following steps: in order to achieve the technical purpose, the invention adopts the following technical scheme:

the radar rapid comprehensive detection equipment based on the hybrid bus is used for testing an airborne radar and is characterized by comprising a detection equipment host, an antenna, a bracket and a cable, wherein the detection equipment host comprises a controller based on PXI bus communication, a signal source assembly, a signal analyzer assembly, an oscilloscope assembly, a digital multimeter assembly, a microwave switch module, an intermediate frequency switch module, a matrix switch module, a serial port communication module, a 1553B bus communication module, an internal bus communication module, a radar target simulator module and an operation interface, and an interface adapter plate provided with a connecting cable with the airborne radar;

the controller is used for sending out instructions for controlling the microwave switch module, the intermediate frequency switch module, the matrix switch module, the serial port communication module, the 1553B bus communication module, the internal bus communication module and the radar target module, and reading test data of the signal source component, the signal analyzer component, the oscilloscope component and the digital multimeter component;

The interface adapter plate is connected with the microwave switch module, the intermediate frequency switch module, the matrix switch module, the serial port communication module, the 1553B bus communication module, the internal bus communication module and the radar target module through cables;

the microwave switch module is used for receiving radio frequency signals and intermediate frequency signals in radar signals sent by the airborne radar, transmitting the radio frequency signals or the intermediate frequency signals to the signal analyzer, and analyzing the frequency spectrum characteristics and the power characteristics of the radio frequency signals or the intermediate frequency signals through the signal analyzer;

the intermediate frequency switch module is used for receiving video signals in radar signals sent by an airborne radar, including guidance signals, and accessing the video signals into the oscilloscope assembly;

the matrix switch module is used for receiving low-frequency signals in radar signals sent by an airborne radar, including voltage, current and resistance signals, and connecting the low-frequency signals into the digital multimeter component;

the serial communication module is used for transmitting serial signals between the controller and the airborne radar, and comprises RS232 and RS422 serial signals;

the 1553B bus communication module is used for transmitting 1533B bus signals between the controller and the airborne radar;

the internal bus communication module is used for simulating an airborne radar internal bus controller and an airborne radar internal bus device and transmitting internal bus signals between the controller and the airborne radar, and is provided with a singlechip and a communication module;

The radar target simulator module is used for transmitting radar excitation signals and radar reference signals between the controller and the airborne radar.

Preferably, the internal bus communication module comprises a receiving module, a CPLD logic processing module, a RAM storage module, a singlechip module and an output module; wherein,,

the receiving and level converting module is used for receiving an input signal sent by a controller or an airborne radar in a detection equipment host of the sending end, performing level conversion on the input signal and then sending the converted input signal to the CPLD logic processing module;

the CPLD logic processing module is used for carrying out logic processing on the signals sent by the receiving module, obtaining input data and sending the input data to the singlechip module and the RAM storage module; the analysis and operation result of the input data sent by the singlechip module is logically processed to obtain output data and the output data is sent to the output module;

the singlechip module is used for receiving the input data sent by the CPLD logic processing module, analyzing and operating the input data, and sending the analysis and operation results of the input data to the CPLD logic processing module;

and the output module is used for receiving the output data sent by the CPLD logic processing module and performing level conversion to obtain an output signal and sending the output signal to the airborne radar or the controller of the receiving end.

Preferably, the radar target simulator module comprises a frequency synthesis unit, a receiving unit, a radar target generation module, a transmitting unit and a frequency measurement module, radar excitation signals of the airborne radar in C wave band, X wave band or KU wave band are injected into the radar target simulator module through a radio frequency cable, the radio frequency signals are down-converted into intermediate frequency signals through the receiving unit, the radar target generation module adopts a digital radio frequency storage technology to generate two independent echo signals with simulated target speed, distance and amplitude information, the two independent echo signals are up-converted to the radio frequency signals through the two transmitting units, the frequency synthesis unit provides local oscillation signals for the receiving unit and the transmitting unit, and the antenna outputs the radio frequency signals output by the transmitting unit to an antenna of the airborne radar in a space radiation mode for receiving.

Preferably, the controller adopts a PXI embedded controller, the signal source component adopts a PXI radio frequency signal generator-containing PXI-5654 component, the signal analyzer component adopts a PXI architecture M9290A component, the microwave switch module adopts a PXI bus-based AMC4312 digital multimeter component, the oscilloscope component adopts an AMC4336 oscilloscope, the intermediate frequency switch module adopts an NI PXI-2593 component, the matrix switch adopts a PXI bus-based AMC4614 component, the serial port communication module adopts a PXI bus-based AMC5214C component, and the 1553B bus communication module adopts a PXI bus-based AMC5207A component.

Preferably, the comprehensive detection device further comprises a temperature control unit and a wide temperature cabinet, wherein a power supply, a fan and a backboard for installing each device are arranged in the wide temperature cabinet, and the backboard adopts a PXIe and 3U-CPCI mixed bus backboard.

Preferably, the radar rapid comprehensive detection device is used for implementing a test item and a fault isolation item, wherein the test item comprises an excitation source frequency spectrum test, a transmitting unit frequency spectrum test, a receiving unit test, a power supply unit test, an internal bus test, a guidance signal test, an antenna BIT signal test, a frequency synthesis unit test and a target simulation test;

the fault isolation comprises complete machine fault isolation, processing unit fault isolation, transmitting unit fault isolation, receiving unit fault isolation, power supply unit fault isolation, antenna fault isolation, frequency synthesizer unit fault isolation and radar system fault isolation.

The rapid comprehensive detection method for the radar is applied to the rapid comprehensive detection equipment based on the hybrid bus, and is characterized in that an operation interface is arranged on a controller, and a test item selection key and a fault isolation operation key are arranged on the operation interface, and the rapid comprehensive detection method comprises the following steps:

connecting an airborne radar with the comprehensive detection equipment by using a radio frequency cable;

Selecting a corresponding test item selection key on the operation interface;

the comprehensive detection equipment automatically executes a corresponding test flow according to the selected key to complete comprehensive test of the airborne radar, if the test result shows that the airborne radar has no fault, the test result is output, the test process is finished, if the test result shows that the airborne radar has fault, the fault phenomenon is analyzed, a judgment result is sent out, and the next step is carried out;

and the comprehensive detection equipment automatically executes the debugging process according to the judging result, returns the testing process if the debugging result passes, retests the testing process if the debugging result does not pass, and automatically executes the corresponding fault isolation process according to the judging result and the debugging result.

Preferably, after the comprehensive detection device is turned on, the whole machine self-checking process is executed first at present when the test item is executed.

Preferably, the test item selection key comprises an excitation source frequency spectrum test operation key, an emission unit frequency spectrum test operation key, a receiving unit test operation key, a power supply unit test operation key, an internal bus test operation key, a guidance signal test operation key, an antenna BIT signal test operation key, a frequency synthesis unit test operation key and a target simulation test operation key;

The fault isolation operation keys comprise a complete machine fault isolation operation key, a processing unit fault isolation operation key, a transmitting unit fault isolation operation key, a receiving unit fault isolation operation key, a power supply unit fault isolation operation key, an antenna fault isolation operation key, a frequency synthesizer unit fault isolation operation key and a radar system fault isolation operation key.

The beneficial effects are that: due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. highly integrated:

all functional components in the radar rapid comprehensive detection equipment are in modularized design, small in size and light in weight, and are convenient for carrying and using in the external field.

2. The rapid comprehensive detection technology comprises the following steps:

the radar rapid comprehensive detection equipment not only can rapidly detect the frequency domain characteristics, the time domain characteristics, the target searching and tracking characteristics and the instruction guidance functions of the radars with different models and different bus forms, but also can perform data interaction and communication with the radars, and can acquire the self-checking information (BIT information) in the radars for auxiliary detection while comprehensively detecting the radars, so that the radar detection speed and accuracy are greatly improved.

3. Ultra-wide operating frequency band:

Most of the existing radar detection devices are customized detection devices of certain radars, and the working frequency bands of the existing radar detection devices are one of C\X\Ku wave bands, and the signal detection and target simulation frequency bands of the existing radar detection devices cover C\X\Ku, so that the existing radar detection devices can meet the working range of most airborne radars;

4. wide temperature working:

the radar rapid comprehensive detection equipment adopts a wide temperature cabinet and an auxiliary heating module, can be automatically heated when the temperature is lower than 5 ℃, ensures that each module in the equipment can normally work when the equipment works, and can cover-40-55 ℃ after practical verification.

Drawings

FIG. 1 is a schematic diagram of a host computer of a comprehensive detection device according to the present invention;

FIG. 2 is a schematic diagram of a signal analyzer assembly, an oscilloscope, and a controller in communication;

FIG. 3 is a diagram of excitation source spectrum test connections;

FIG. 4 is a diagram of a transmit unit spectrum test connection;

FIG. 5 is a guided signal test connection diagram;

FIG. 6 is a power unit test connection diagram;

FIG. 7 is a schematic diagram of an internal bus communication module;

FIG. 8 is a system workflow diagram;

FIG. 9 is a functional block diagram of a radar target simulator module;

FIG. 10 is a functional block diagram of a radar in-situ detection control module;

FIG. 11 is a radar fault isolation flow;

FIG. 12 is a self-test flow chart of the integrated test device;

FIG. 13 is a flow chart of an automatic test of the integrated test equipment;

FIG. 14 is a diagram of a receive unit test connection;

FIG. 15 is an internal bus test connection diagram;

FIG. 16 is a diagram of antenna BIT signal test connections;

FIG. 17 is a frequency synthesizer unit test connection diagram;

FIG. 18 is a diagram of a radar target simulator test connection;

fig. 19 is a flowchart of a process for an internal bus communication module during fault detection.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The invention provides a radar rapid comprehensive detection device based on a hybrid bus, wherein the core part of the whole set of radar rapid comprehensive detection device is a detection device host, and the main function aiming at a certain type of radar test is completed by the detection device host. In consideration of the design of generalization, serialization and combination, the detection equipment host is designed into a portable PXI (PCI extensions for Instrumentation, PCI expansion for an instrument system)/PXIE (PXIExpress)/CPCI (CPCI is compact CPI) mixed case, and the inside of the case is composed of a PXI/PXIE controller, various PXI/PXIE universal instruments, various PXI/PXIE communication modules and a CPCI target simulator, wherein the PXI/PXIE universal instruments are controlled by the controller through PXI bus programs.

Example 1

The embodiment provides a radar rapid comprehensive detection device based on a hybrid bus, which comprises a detection device host, an antenna, a bracket and a cable, wherein the detection device host is shown in a structural schematic diagram in fig. 1, and comprises a controller based on PXI bus communication, a signal source component, a signal analyzer component, an oscilloscope component, a digital multimeter component, a microwave switch module, an intermediate frequency switch module, a matrix switch module, a serial port communication module, a 1553B bus communication module, an internal bus communication module, a radar target simulator module and an operation interface, and an interface adapter plate/signal switching unit of a connecting cable is arranged between the radar target simulator module and an airborne radar.

The controller is used for sending out instructions for controlling the microwave switch module, the intermediate frequency switch module, the matrix switch module, the serial port communication module, the 1553B bus communication module, the internal bus communication module and the radar target module, reading test data of the signal source component, the signal analyzer component, the oscilloscope component and the digital multimeter component, and the operation interface is provided with a test item selection key and a fault isolation operation key. Fig. 2 is a schematic diagram of communication among a signal analyzer component, an oscilloscope and a controller, wherein a radio frequency switch module, namely a microwave switch module, switches radio frequency signals from an airborne radar into a channel corresponding to detection equipment, sends the radio frequency signals into the signal analyzer, and sends the radio frequency signals into the detector and the oscilloscope component for detection processing and waveform testing.

1. The radar rapid comprehensive detection equipment based on the hybrid bus can conduct various tests on the radar. The detailed description is as follows:

1.1, testing procedure of radar internal radio frequency signals (such as excitation source spectrum, emission unit spectrum and the like):

a) As shown in fig. 3, the frequency spectrum of an excitation source sent by the aircraft, as shown in fig. 4, is connected with a microwave switch module through a signal adapter plate by the radio frequency signal emitted and output by the aircraft;

b) The controller controls the microwave switch module to switch different paths according to the test flow, and sends signals into the signal analyzer component;

c) Completing signal testing by a signal analyzer component;

d) And the controller reads the test result and judges whether the test result is within a qualified range.

1.2, the radar internal video signal (such as guidance signal) test flow is as follows:

a) As shown in fig. 5, the radar and the signal adapter plate are connected through a cable, and guidance signals sent by the aircraft are connected into the intermediate frequency switch module;

b) The controller switches different paths by controlling the intermediate frequency switch module according to the test flow, and the signal is connected to the oscilloscope assembly;

c) And the oscilloscope component completes signal testing.

1.3, the test flow of signals (from a monitoring port) such as radar internal voltage, current, resistance and the like is as follows:

a) As shown in fig. 6, the radar monitoring port is connected with the signal adapter plate through a cable, and signals such as radar internal voltage, current, resistance and the like are connected into the matrix switch module;

b) The controller switches different channels by controlling the matrix switch module according to the test flow, and the signals are connected into the digital multimeter component;

c) Completing signal testing by a digital multimeter component;

1.4, the test flow of the internal serial port of the radar and the bus communication signals (such as 3 channel module values of a receiving unit, antenna BIT and the like) is as follows:

a) As shown in fig. 1, the radar and signal adapter plate is connected through a cable, and the serial port signal, the bus communication signal and the internal bus signal in the radar are respectively connected into the serial port communication module, the 1553B bus communication module and the internal bus communication module;

b) The controller sends a specified command to the radar according to the test flow, and reads the current radar state information;

c) Judging whether each functional module of the radar works normally or not according to the state information;

2. The hardware design of the host of the radar rapid comprehensive detection device based on the hybrid bus in this embodiment is as follows:

the radar rapid comprehensive detection equipment fully considers high reliability and environmental adaptability in design, adopts mature goods shelf products as much as possible, and is easy to install, replace and maintain. The test management software of the radar rapid comprehensive detection device runs in the Windows7 system operation environment, takes Qt and VS2017 as development platforms, integrates system scheduling, signal measurement and data management, and has the functions of device self-detection, test data analysis, data management, assistance and the like. The man-machine interface of the radar rapid comprehensive detection equipment is simple to use and easy to learn, and manual subjective intervention is reduced as much as possible in the operation process.

The main machine of the detection device is the core of the rapid comprehensive detection device for the radar, and is used for providing excitation and control signals required by the work of the radar to be detected and testing correspondingly output signals such as voltage, digital, analog, microwave and the like.

On the basis of radar test requirements and test resource analysis, the composition and the type of a host computer of the detection equipment are determined according to the function and performance index requirements of each equipment and the equipment list in the top-level design file. In this embodiment, the preferred controller is a PXI embedded controller, the signal source component is a PXI-radio frequency signal generator-containing PXIE-5654 component, the signal analyzer component is a PXIE-structured M9290A component, the microwave switch module is a M9156C component, the digital multimeter component is a PXI-bus-based AMC4312 digital multimeter, the oscilloscope component is an AMC4336 oscilloscope, the intermediate frequency switch module is a PXI-2593 component, the matrix switch is a PXI-bus-based AMC4614 component, the serial port communication module is a PXI-bus-based AMC5214C component, and the 1553B bus communication module is a PXI-bus-based AMC5207A component. The devices are described in detail below.

2.1 controller

The controller is a PXI embedded controller of AMC 4198. The controller adopts an Intel Corei7 processor, is specially designed for a PXI-based hybrid test system, and provides a stable and reliable platform for various measurement test applications. Through combining the Intel cube Core ™ i7-3612QE 2.1GHz four-Core processor and the dual-channel 8GB 640 MHz DDR3 memory, the AMC4198 is very suitable for being applied to processor intensive modularized instruments and data acquisition, can perfectly cope with complex test and measurement tasks, and simultaneously greatly shortens test time.

AMC4198 connects and controls various instruments to provide rich interfaces, including two gigabit Ethernet interfaces, one of which can be used by a user for LAN connection and the other for controlling new-generation LXI instruments; the four USB 3.0 ports can be used for connecting common peripheral equipment, controlling USB interface instruments and high-speed data transmission, and can also be used for realizing the network port redundancy design of the system by using double network ports. AMC4198 combines various instrument control interfaces, with reliable mechanical and electrical design, to meet the demand characteristics of the test system.

2.2 Signal Analyzer Assembly

The main functions of the signal analyzer assembly are as follows:

a) And receiving a controller command, and automatically testing the signal spectrum characteristics of the input radio frequency signal. Carrying out automatic test on signal characteristics such as emission spectrum, excitation spectrum and the like of the radar in different working modes;

b) And receiving a controller command, and automatically testing the signal power characteristics of the input radio frequency signal. And automatically testing the transmitting signal power and the exciting signal power of the radar in different working modes.

The signal analyzer component adopts a DeM 9290A series component, which is a PXIE architecture and occupies 4 slots.

The maximum average power and the peak pulse power of the signal analyzer are calculated according to the maximum average power and the peak pulse power of the signal analyzer, the signal analyzer is matched with a 50dB coupler and a high-power microwave load, the highest power of a test signal can reach 80dBm, and the power test of the microwave signal exceeding 100Kw can be completed. Considering the highest peak power and average power of a high power microwave load, it is expected that the peak power that can be tested exceeds 10kW (duty cycle +.20%), the average power is about 2kW.

2.4 oscilloscope assembly

The oscilloscope component is an AMC4336 oscilloscope. AMC4336 has 300MHz analog bandwidth, and the highest sampling rate can reach 2GSa/s through double-channel interleaving sampling, and the single-channel storage depth can reach 4GB. The module has very flexible and comprehensive triggering function, and supports complete A+B triggering function, time triggering function and triggering release function. The module can conveniently capture and analyze transient signals and broadband analog signals by matching with a host and driving software, and is widely applicable to various high-speed transient signal measurement systems, such as test occasions of engine tests, radar tests, network communication tests, high-frequency vibration tests, industrial process tests and the like.

2.5 microwave switch Module

The microwave switch module adopts the German M9156C and is mainly used for providing an input/output automatic switching channel of radio frequency signals.

2.6 digital multimeter Assembly

AMC4312 is selected for the digital multimeter component. The AMC4312 module is a 6.5-bit digital multimeter module based on a PXI bus, and has the functions of measuring the signal quantity such as direct current voltage, direct current, alternating current voltage, alternating current, two-wire resistance, four-wire resistance, frequency/period and the like, and has the functions of automatic measuring range, program control calibration, external triggering, overload protection and the like. The module has 6-bit half-precision rapid reading capability, and the capability endows the module with wider application, and can greatly improve the throughput of a test system and reduce the test cost.

2.6 Signal Source Assembly

The signal source component is selected from PXIE-5654 of NI company, which can generate continuous wave signal or basic standard modulation format such as AM\FM\PM and pulse. The PXI RF analog signal generator provides the function of a radio frequency signal generator for a compact modularized PXI platform, can be combined with other PXI modularized instruments, and is designed into an automatic test system for testing applications such as radar, RF integrated circuits and the like.

2.7, intermediate frequency switch Module M9146A

The intermediate frequency switch module selects NI PXI-2593 to provide an input/output switching channel of intermediate frequency signals.

2.8 matrix switch Module AMC4614

The matrix switch module selects AMC4614.AMC4614 is a 4X 64 high-density matrix switch module based on PXI bus, and the module is a reed relay with long service life, small volume and high speed, and the relay contact mode is a double-pole single-throw mode. The module can realize the input or output of 4 paths of different signals at most, and can flexibly select the paths according to specific requirements so as to realize the multipath output or input.

2.9, serial communication module AMC5214C

The serial communication module selects AMC5214C. The AMC5214C module is a PXI bus multi-serial communication interface module conforming to a universal asynchronous serial communication protocol (a drive circuit of an optional RS232/RS422/RS485 standard). Each channel of the module is provided with an independent photoelectric isolation circuit, a large-capacity receiving buffer zone which is flexibly distributed is provided in the module, and the embedded processor in the module is matched to coordinate and process the communication work of each channel, so that the PXI host does not need to participate in the management communication process, the relatively real-time working state of all channels is ensured, the control process of a system program is simplified, and the time and resources of the host are saved. AMC5214C is suitable for use in integrated systems of various serial communication bus standards, and for testing application requirements for developing various serial communication products.

2.10, 1553B bus communication module AMC5207A

The 1553B bus communication module selects an AMC5207A module. AMC5207A is a two-channel multifunctional 1553B bus communication interface module based on a PXI bus, and 1553B bus protocol IP cores of the module have the advantages of high reliability, strong fault tolerance and the like through multiparty application verification. AMC5207A can simulate the operation modes of the simulation bus BC, 31 RTs and BM simultaneously, and supports message formats including BC, RT, broadcast, mode codes and the like. AMC5207A adopts the design thought of a dual-channel independent hardware path, and realizes simultaneous test simulation of two real multifunctional 1553B devices on a 3U PXI module space.

2.11 internal bus communication module

In the invention, the radar internal bus communication module based on the PXI bus mainly completes 2 functions.

a) Simulating an internal bus controller (M0) of a radar of a certain model, controlling the operation of a sub-machine (namely an airborne radar) through a module, receiving the state of the sub-machine, and finishing the conversion, addressing, transmission and verification of data information;

b) And simulating a radar internal bus device (SN) of a certain model, receiving an instruction from the radar processing unit, returning the subsystem state (namely the radar rapid comprehensive detection device) to the radar processing unit, and completing transmission, verification, conversion and combination of radar data information.

The internal bus communication module comprises a receiving module, a CPLD logic processing module, a RAM storage module, a singlechip module and an output module; wherein,,

As shown in fig. 7, the internal bus communication module includes a receiving and level converting module (such as 74FCT162244 device), a CPLD logic processing module (such as ZSPL1046 device), a RAM memory module (such as 1DT71256 device), a single chip microcomputer module (such as 8031 device), and an output and level converting module (such as 74FCT162245 device).

When the internal bus communication module is used for testing a single unit (such as a transmitting unit/a transmitting extension), the internal bus environment special for the radar system is simulated, the working mode of the unit is set, and the working state and the working parameters of the unit in the working mode are read to judge. As shown in fig. 19, a process flow that can be implemented by the internal bus module is shown, taking a certain radar transmitting unit detection as an example, in the fault detection process, the internal bus communication module gradually determines whether various test results are correct, and timely obtains a conclusion of a corresponding component fault (such as a component 1/component 2/component 3/component 4/component 5 fault).

2.12 Radar target simulator Module

As shown in fig. 9, in the present invention, the radar target simulator module is a highly integrated design, and is composed of a frequency synthesis unit, a receiving unit, a radar target generating module, a transmitting unit, and a frequency measuring module.

The main function of the target simulator module is to generate independent double channels and double analog target output; the target simulation software is provided, parameters such as static state and motion state of a target, target speed, acceleration and target distance can be set, multiple scene parameters can be set, and a scene target can be quickly built; the method can be used for detecting functions of searching, tracking and the like of the radar target on the aircraft under various environmental conditions (without specific field requirements) without starting radar emission.

The radar excitation signal is injected into the target simulator module through the radio frequency cable, the radio frequency signal is down-converted into an intermediate frequency signal through the receiving unit, a digital radio frequency storage technology is adopted to generate two paths of independent echo signals with parameter information such as simulated target speed, distance, amplitude and the like, the two paths of transmission units are used for up-converting the echo signals into radio frequency signals, the radio frequency signals are output to the radar antenna through the transmission antenna in a space radiation mode, and the function of providing target simulation for the radar is achieved.

The target simulator comprises the frequency measuring module, and can automatically detect and adapt to the working frequency of the radar in real time without manual frequency setting under the condition of passively receiving the radar signal. The frequency measurement module adopts an instantaneous frequency measurement technology, utilizes the interference phenomenon of microwave signals, adopts an autocorrelation technology to measure frequencies, adopts a plurality of correlators to divide the working frequency range into a plurality of sufficiently fine frequency bands in order to achieve higher frequency measurement precision, carries out phase detection and quantization on the output of each correlator, and synthesizes obtained data after deblurring to finally obtain the frequency measurement data.

2.13 temperature control Unit

In order to ensure that the equipment can normally work at the low temperature of minus 40 ℃, the invention designs a temperature control unit which is integrated in a system case. The temperature control system takes a singlechip as a control core, platinum resistor as a temperature measuring element and a relay as an automatic control system for driving a control device. After the temperature signal is collected by the singlechip, the system timely drives the heating unit or the heat radiating unit according to the temperature control curve defaulted by the system or customized by a customer through accurate logic judgment, thereby realizing temperature control.

In addition to the automatic control function, the temperature control system can be attached with a manual control function according to actual use requirements, and a manual switch executes control operation. The manual control mode can complete all functions except the temperature control curve, and can also be used for detecting and checking hardware circuits and electric circuits.

The acquisition system of the temperature control unit takes a singlechip as a core, obtains the voltage variable on the temperature sensor by utilizing a balance bridge mode, and sends the voltage variable to the singlechip after amplification treatment of the integrated operational amplifier circuit. The temperature analog signal is converted into a digital signal through the singlechip A/D conversion channel, then the digital signal is subjected to numerical conversion and filtering, and finally the data analysis and logic judgment are carried out, so that the heating or heat dissipation control function is realized.

The temperature control system takes a singlechip as a control core, platinum resistor as a temperature measuring element and a relay as an automatic control system for driving a control device. After the temperature signal is collected by the singlechip, the system timely drives the heating unit or the heat radiating unit according to the temperature control curve defaulted by the system or customized by a customer through accurate logic judgment, thereby realizing temperature control.

In order to meet the consistency of the heating power of the heaters when the AC220V/50Hz and the AC115V/400Hz are respectively supplied with power, the intelligent temperature control system uses two identical heaters, and when the power supply is AC220V/50Hz, the two heaters are connected in series; when the power supply is AC115V/50Hz, the two heaters are connected in parallel, and finally, the consistency of heating power is realized. The serial-parallel switching operation of the heater is realized by an internal circuit of the temperature control unit.

2.14, wide temperature Chassis

The wide temperature chassis adopts a PXIe and 3U-CPCI mixed bus backboard. The chassis has reasonable structure, accords with the PXI Express hardware specification, supports the PCIe Gen2.0 standard 5Gbps communication rate, and has the maximum system bandwidth reaching 8GB/s. High reliability power supply providing 1000W output supports remote/local intelligent power control. The system has a comprehensive system monitoring function, can comprehensively monitor the temperature, voltage, clock and fan rotation speed in the system, and provides an easy-to-use user interface. The automatic overtemperature alarm is supported, and alarm parameters such as alarm temperature, fan rotating speed, voltage range and the like can be set.

2.15 Signal transfer Board

The signal adapter plate is mainly used for classifying and carding input signals and finally classifying the signals into required equipment.

The signal adapter plate is positioned on the back of the chassis, and input signals of the signal adapter plate comprise signals such as radio frequency signals, intermediate frequency signals, network signals, serial port communication signals, current and voltage and the like according to system requirements.

2.16, cable and accessories

The main requirements of the cable are a control cable, a power supply cable and a radio frequency cable.

The control cable and the power supply cable adopt military connectors and full-communication military aviation cables, are high-temperature and low-temperature resistant, and can meet the use requirements of the system.

The radio frequency cable adopts military aviation grade transmission cable, and the environment application scope is: the wear resistance is strong at 60 ℃ to 200 ℃ below zero, so that the problems of 'extremely easy wear', 'extremely easy frost crack', 'extremely easy aging' of a protective layer and the like in the use process are avoided to a great extent.

In the invention, the radar rapid comprehensive detection equipment comprises 10 module type PXI bus instruments, 1 PXI controller and extremely large equipment quantity. The instrument equipment resources used in the system, whether universal instruments or special equipment, adopt PXI standard instrument control buses. Meanwhile, the possible expansibility requirement of the outfield is considered, and the network cable ultra-remote control equipment can be used for running. And the universal design is carried out on all special equipment, so that a user does not need to know the design of the special equipment, and remote control can be finished only by using a universal program control command. Such as: the internal bus communication module comprises a singlechip, a communication module, a control module and other devices. In the prior art, control signals of these devices are collected on a multi-core socket, and different users must know the design of the internal bus communication assembly, make corresponding control cables, provide corresponding power supply and digital control signals to operate, so that the expansibility is poor. The internal bus is used as a special device and is connected to the controller through the PXI bus, so that a user does not need to manufacture additional hardware devices, and the user can realize the required operation by designing different control programs.

2. Example two

The embodiment provides a radar rapid comprehensive detection method, which is applied to the radar rapid comprehensive detection equipment based on a hybrid bus in the first embodiment, wherein a controller is provided with an operation interface, and a test item selection key, a target simulation operation key and a fault isolation operation key are arranged on the operation interface, and the method comprises the following detection steps:

selecting a corresponding test item selection key or a target simulation operation key on the operation interface;

and the comprehensive detection equipment automatically executes the debugging process according to the judging result, returns the testing process if the debugging result passes, retests the testing process if the testing process does not pass, and automatically executes the corresponding fault isolation process according to the judging result and the debugging result.

Specifically, the test items include: the test system comprises a complete machine test, an antenna unit test, a transmitting unit test, a processing unit test, a receiving unit test, a power supply unit test, a frequency synthesizer unit test and the like, wherein test items are provided with corresponding test item keys.

Before testing, project selection and automatic operation are allowed, the testing process is executed in single step or automatically according to the trial sequence selected by an operator, the system tests whether the project passes according to radar test information (BIT), instrument test data and manual intervention comprehensive diagnosis debugging, faults are met and stay in a fault interface, the operator debugs, if the faults still cannot pass, suggestions are isolated, and the whole radar system testing flow chart 10 shows.

The functions are described in detail as follows.

1. Fault isolation function

The fault isolation function includes: fault isolation of the whole machine, antenna unit fault isolation, transmitting unit fault isolation, processing unit fault isolation, receiving unit fault isolation, power supply unit fault isolation and frequency synthesizer unit fault isolation. The radar fault isolation flow is shown in fig. 11, and UUT is an abbreviation of unit test, which indicates a tested module. Due to the complexity of the radar, how to improve the accuracy of fault isolation at limited test interfaces, the probability of achieving the final desired isolation of the in-situ test system to an individual LRU is greater than 95%.

Fault isolation is the isolation of faults to 1 or more LRUs (SRUs) based on radar test information (BIT), meter test data, and human judgment comprehensive diagnostics. The rapid comprehensive detection equipment for the radar acquires the self-detection information (BIT information) in the radar for auxiliary detection while carrying out comprehensive detection on the radar, so that the detection speed and accuracy of the radar are greatly improved. BIT (built in test equipment built-in test equipment) of the radar is a technology for completing fault diagnosis and fault isolation by means of circuits and programs of all modules in the radar, and can automatically detect, diagnose and isolate barriers in a system, so that the fault diagnosis efficiency and accuracy of the radar are improved, and the maintenance cost is reduced. The method is limited by the current technology, the volume of equipment and other conditions, the false alarm rate in the BIT detection design of the radar is very high, and the use efficiency of the equipment and the trust of operators on BIT information of the equipment are affected. Although the BIT false alarm rate of the radar is high, the radar false alarm rate contains a lot of effective information, the radar rapid detection equipment can utilize the information contained in the BIT of the radar to carry out targeted detection, the information of the BIT is combined with the special detection function of the equipment function and performance, and the detection speed and accuracy of the radar are improved.

2. System test function

2.1 System self-test

As shown in fig. 12, the system self-test includes a self-test of the system meter and a closed loop self-test of the system hardware itself. The purpose is to ensure the system instrument and hardware to be normal and the test result to be effective. The operation steps are as follows:

f) In a test item column of the operation interface, checking a system self-checking test;

g) And carrying out system self-checking according to the prompt of the system prompt bar.

System self calibration

The system self-calibration function is mainly aimed at testing the microwave channel of the system. When the microwave is tested, the loss of the test channel exists, and the accuracy of the system test is affected, so that an automatic calibration function for the microwave channel is added in the program, the test loss is stored in the database, and in the test process, the program can automatically extract corresponding data from the database and compensate the corresponding data into a test result, so that the accuracy and the reliability of the system test are improved. The operation steps are as follows:

in a test item column of the operation interface, checking 'system self-calibration';

and carrying out self-calibration of the system according to the prompt of the system prompt bar.

2.2 preparation before System testing

Radar preparation before testing:

1) The aircraft is grounded;

2) The air supply port of the airplane is connected with the air outlet of the cold windmill;

3) And connecting an aircraft power supply cable.

The in-situ detection system is ready to work before testing:

1) Connecting a terminal of the in-situ test subsystem to a ground point by using a ground wire;

2) An alternating current 220V/50Hz power supply is used for supplying power to the radar rapid comprehensive detection equipment, and a power supply indicator lamp is checked, if the indicator lamp is yellow, the condition that an external power supply is normal is indicated; if the indicator light is not on, indicating that the external power supply fails, and checking the power supply and connection of the power supply is needed;

3) Turning on a radar rapid comprehensive detection device;

4) Double-clicking a software icon (i.e. an operation interface) of the 'XX radar rapid comprehensive detection device' on the desktop to start test software.

2.3 System testing

After the preparation is completed, the system test step may be entered, and fig. 13 is a flowchart of an automatic test of the comprehensive test equipment.

2.31 excitation Spectrum testing

As shown in fig. 3, the aircraft ATE interface is coupled to a radar rapid integrated detection device.

Opening an operation interface, checking each radar test with a frequency band of C/X/KU, and checking ' project test ' - ' excitation source spectrum test ' - ' under a test item in sequence;

clicking to start testing, and sending a control instruction to the radar through an RS232 serial port by the controller, and simultaneously controlling the radar to output excitation signals of specified waveforms and specified frequency points;

The controller controls the microwave switch module to be placed in a designated passage, transmits an excitation signal to the signal analyzer component for testing, and the test result is transmitted to the controller through the PXI bus and displayed on the operation interface;

2.32, emission unit Spectrum testing

As shown in fig. 4, the aircraft ATE interface is coupled to a radar rapid integrated detection device.

Opening an operation interface, checking each radar test with a frequency band of C/X/KU, and checking project test, emission unit spectrum test under a test item in sequence;

the antenna-off-load switch controlling radar ICP is placed in the "load" position;

clicking to start testing, the controller calls a radar interface function, and sends a control instruction to the radar transmitting unit through an aircraft ATE interface to control the radar transmitting unit to output a transmitting frequency spectrum signal with a designated waveform and a designated frequency point;

the controller controls the microwave switch module to be placed in a designated passage, transmits the emission spectrum signal to the signal analyzer component for testing, tests phase noise, straying and the like of the emission spectrum signal, and transmits the result to the controller through the PXI bus and displays the result on the operation interface. 2.33 guidance Signal test

As shown in fig. 5, the aircraft ATE interface is coupled to a radar rapid integrated detection device.

The method comprises the steps of (1) checking 'various radar tests with frequency bands of C/X/KU bands', and sequentially checking 'project tests' - 'guidance signal tests';

clicking to start testing, calling a radar interface function by the controller, sending a control instruction to the radar processing unit through the aircraft ATE interface, and outputting specified guidance signal pulses by the radar processing unit;

the controller controls the intermediate frequency switch module to be arranged in a specified passage, transmits guidance signals to the oscilloscope assembly for testing, tests CC signals, guidance communication signals, state signals, pulse parameters and the like, and transmits the results to the controller through the PXI bus and displays the results on the operation interface.

2.34 Power supply Unit test

As shown in fig. 6, a power supply unit is associated with the radar rapid integrated detection apparatus.

Opening an operation interface, checking each radar test with a frequency band of C/X/KU, and checking project test, power supply unit test under a test item in sequence;

clicking to start testing, and controlling the digital IO module to send a control pulse signal to the power supply unit by the controller to control the starting of the radar power supply unit;

The controller controls the matrix switch module to be placed in a designated passage, signals such as voltage, current and the like are sent to the digital multimeter component, the digital multimeter component is used for testing, and the result is transmitted to the controller through the PXI bus and displayed on the operation interface.

2.35 receiving Unit test

As shown in fig. 14, the aircraft ATE interface, the receiving unit, and the radar rapid integrated detection apparatus are coupled.

Opening an operation interface, checking each radar test with a frequency band of C/X/KU, and checking project test and receiving unit test under a test item in sequence;

clicking to start testing, the controller calls a radar interface function, sends a control instruction to the radar processing unit through an aircraft ATE interface, the radar processing unit controls the receiver to be in a corresponding working state, reads 3 channel module values and TR tubular state values of the receiver through an RS232 serial port, judges whether the receiver is normal according to the numerical value, and displays the result on an operation interface;

the controller sequentially controls the microwave switch module to be placed in a designated passage, transmits the BIT signal of the receiver to the signal analyzer component for testing, tests the BIT signal, transmits the result to the controller through the PXI bus and displays the result on the operation interface.

2.36 internal bus test

As shown in fig. 15, a power supply unit is associated with the radar rapid integrated detection apparatus.

Opening an operation interface, checking each radar test with a frequency band of C/X/KU, and checking project test, internal bus test under a test item in sequence;

clicking to start testing, sending a designated command to a processing unit by the internal bus communication module through the signal adapter plate, receiving the command by the processing unit, and returning corresponding parameters;

and the controller and the processing unit are in data communication, the current internal bus return parameter value is obtained, and whether the internal bus communication function of the processing unit is normal is judged through the parameter value range.

2.37, antenna BIT Signal test

As shown in fig. 16, the aircraft ATE interface, antenna feed servo unit is coupled to the radar rapid integrated detection apparatus.

Opening an operation interface, checking each radar test with a frequency band of C/X/KU, and checking ' project test ' - ' antenna BIT test ' - ' under a test item in sequence;

clicking to start testing, calling a radar interface function by the controller, and sending a control instruction to the radar processing unit through the aircraft ATE interface, wherein the radar processing unit controls the antenna BIT switch to be in a specified state;

The controller controls the microwave switch module to be placed in a designated passage, transmits the antenna BIT signal to the signal analyzer component for testing, and the result is transmitted to the controller through the PXI bus and displayed on the operation interface.

2.38 frequency synthesizer Unit test

As shown in fig. 17, an aircraft ATE interface, a frequency synthesizer unit, and a radar rapid integrated detection device are coupled.

Opening an operation interface, checking each radar test with a frequency band of C/X/KU, and checking a project test, a frequency synthesizer unit test under a test item in sequence;

clicking to start testing, calling a radar interface function by the controller, and sending a control instruction to the radar frequency synthesizer unit through the aircraft ATE interface, wherein the radar frequency synthesizer unit outputs a radio frequency signal of a designated frequency point;

the controller controls the microwave switch module to be arranged in a designated passage, transmits the radio frequency signal output by the frequency synthesizer to the signal analyzer component for testing, transmits the test result to the controller through the PXI bus, and displays the test result on the operation interface

2.39 target simulation test

As shown in fig. 18, the aircraft ATE interface, radar excitation signal, and radar rapid integrated detection apparatus are coupled.

Opening an operation interface, checking an XX aircraft radar test, and checking a project test and a target simulation test under a test item in sequence;

the controller controls the microwave switch module to be placed in a designated passage, and transmits radio frequency signals output by the frequency synthesizer to the target simulator module for target simulation, and the output target signals are radiated to the radar through the antenna;

the controller controls the radar to search, track and intercept the radar, and the test result is transmitted to the controller through the PXI bus and displayed on the operation interface.

The radar rapid comprehensive detection equipment is different from the single automatic test equipment in the past, and is a multifunctional integrated test support system for in-situ test, fixed detection and fault isolation of all radar complete machines and units meeting the frequency band of C/X/KU wave bands. The method not only needs to consider acceptance items, debugging methods and troubleshooting means for guaranteeing the performances of the whole machine and the units, but also needs to consider hardware support meeting acceptance and debugging, and the rationality and operability of the working procedure.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.

Claims

1. The radar rapid comprehensive detection equipment based on the hybrid bus is used for testing an airborne radar and is characterized by comprising a detection equipment host, an antenna, a bracket and a cable, wherein the detection equipment host comprises a controller based on PXI bus communication, a signal source assembly, a signal analyzer assembly, an oscilloscope assembly, a digital multimeter assembly, a microwave switch module, an intermediate frequency switch module, a matrix switch module, a serial port communication module, a 1553B bus communication module, an internal bus communication module, a radar target simulator module and an operation interface, and an interface adapter plate provided with a connecting cable with the airborne radar;

2. The radar rapid comprehensive detection device based on the hybrid bus according to claim 1, wherein the internal bus communication module comprises a receiving module, a CPLD logic processing module, a RAM storage module, a singlechip module and an output module; wherein,,

3. The rapid comprehensive radar detection device based on the hybrid bus according to claim 1, wherein the radar target simulator module comprises a frequency comprehensive unit, a receiving unit, a radar target generation module, a transmitting unit and a frequency measurement module, radar excitation signals of the airborne radar in a C band, an X band or a KU band are injected into the radar target simulator module through a radio frequency cable, the radio frequency signals are down-converted into intermediate frequency signals through the receiving unit, the radar target generation module adopts a digital radio frequency storage technology to generate two independent echo signals with analog target speed, distance and amplitude information, the two independent echo signals are up-converted into the radio frequency signals through the two transmitting units, the frequency comprehensive unit provides local oscillation signals for the receiving unit and the transmitting unit, and the antenna outputs the radio frequency signals output by the transmitting unit to an antenna of the airborne radar in a space radiation mode for receiving.

4. The hybrid bus-based radar rapid comprehensive detection apparatus of claim 1, wherein the controller employs a PXI embedded controller, the signal source component employs a PXI-5654 component with a PXI radio frequency signal generator, the signal analyzer component employs a M9290A component of a PXI architecture, the microwave switch module employs a M9156C component, the digital multimeter component employs an AMC4312 digital multimeter based on a PXI bus, the oscilloscope component employs an AMC4336 oscilloscope, the intermediate frequency switch module employs an NI PXI-2593 component, the matrix switch employs an AMC4614 based on a PXI bus, the serial port communication module employs an AMC5214C based on a PXI bus, and the 1553B bus communication module employs an AMC5207A based on a PXI bus.

5. The rapid comprehensive detection device for radar based on a hybrid bus according to claim 1, further comprising a temperature control unit and a wide temperature cabinet, wherein a power supply, a fan and a backboard for installing each device are arranged in the wide temperature cabinet, and the backboard adopts a PXIe and 3U-CPCI hybrid bus backboard.

6. The hybrid bus based radar rapid and comprehensive detection apparatus according to claim 1, wherein the radar rapid and comprehensive detection apparatus is configured to implement a test item and a fault isolation item, the test item including an excitation source spectrum test, a transmitting unit spectrum test, a receiving unit test, a power supply unit test, an internal bus test, a guidance signal test, an antenna BIT signal test, a frequency synthesizer unit test, and a target simulation test;

the fault isolation project comprises complete machine fault isolation, processing unit fault isolation, transmitting unit fault isolation, receiving unit fault isolation, power supply unit fault isolation, antenna fault isolation, frequency synthesizer unit fault isolation and radar system fault isolation.

7. The rapid comprehensive detection method for the radar, which is applied to the rapid comprehensive detection device based on the hybrid bus according to any one of claims 1 to 6, is characterized in that the controller is provided with an operation interface, and a test item selection key and a fault isolation operation key are arranged on the operation interface, and the rapid comprehensive detection method comprises the following detection steps:

selecting a corresponding test item selection key on the operation interface;

the comprehensive detection equipment automatically executes a debugging process according to the judgment result, and returns a testing process to retest if the debugging result passes; if the debugging result does not pass, the comprehensive detection equipment automatically executes a corresponding fault isolation flow according to the judging result and the debugging result.

8. The method for rapid integrated detection of a radar according to claim 7, wherein after the integrated detection device is turned on, the complete machine self-test procedure is performed first after the test item is executed.

9. The rapid comprehensive detection method of a radar according to claim 7, wherein the test item selection keys include an excitation source spectrum test operation key, a transmitting unit spectrum test operation key, a receiving unit test operation key, a power supply unit test operation key, an internal bus test operation key, a guidance signal test operation key, an antenna BIT signal test operation key, a frequency synthesis unit test operation key and a target simulation test operation key;

10. The rapid comprehensive detection method for the radar according to claim 7, wherein the rapid comprehensive detection device obtains self-detection BIT information inside the radar for auxiliary detection while comprehensively detecting the radar.