A comprehensive detection device for radar seeker

Abstract

A comprehensive detection device for a radar seeker relates to the field of measurement and control technology. A target angular displacement forming device (1) is provided on the right side of the floor of a microwave darkroom (3). The target angular displacement forming device is connected to a PXI system in a measurement and control cabinet (5) located outside the microwave darkroom via a serial port bus. A window is provided on the wall on the left side of the microwave darkroom. A mounting fixture (16) on a sliding clamping table (4) clamps the radar seeker to be tested and drives the radar seeker to be tested to enter the microwave darkroom through the window. The radar seeker to be tested is connected to a high-frequency unit and a signal switching unit in the measurement and control cabinet via a cable to test a receiving circuit. Then, the radar seeker to be tested is removed from the mounting fixture and placed in a shielding device to test a transmitting circuit. The invention has the advantages of small size, convenient assembly, accurate measurement in a shielded darkroom in an indoor field, and portable use in an outdoor field. It is capable of depth detection of a single pulse Doppler radar seeker, etc.

Description

Technical Field

[0001] The invention relates to the field of measurement and control technology, and in particular to a comprehensive detection device for a radar seeker. Background Art

[0002] As a core component of certain aviation equipment, the radar seeker is used to detect aerial targets and search, intercept and track targets according to the bound tasks. By intercepting the target speed, angle and distance information, the guidance loop is closed. In the absence of target information, the preset information can be searched. The seeker is a single-pulse Doppler radar system. In order to complete the detection of all functions of this component, it is necessary to strengthen the test in dimensions such as speed, angle and distance.

[0003] During the maintenance of a certain type of aviation equipment, the inspection depth of the entire equipment is limited, and only functional indicators can be inspected. There are large inspection errors and limited inspection depth, and the performance of each component cannot be covered. In particular, for the radar seeker, which is crucial to the performance of the equipment, it is impossible to quantitatively complete the inspection of each functional circuit. Therefore, it is urgent to design a ground detection device to simulate the inertial navigation control command component, control the radar seeker, and adjust the target simulator at the same time to complete the dynamic test of the product during the entire dynamic movement. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a comprehensive detection device for a radar seeker. The comprehensive detection device for a radar seeker provided by the present invention has a small size and is easy to assemble. It can be accurately measured in a shielded darkroom indoors and can be portable and used outdoors. It can perform depth detection of single-pulse Doppler radar seekers, etc.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solution:

[0006] A comprehensive detection device for a radar seeker comprises a target angular displacement forming device, an absorbing layer, a microwave darkroom, a clamping table and a measurement and control cabinet. The absorbing layers are respectively arranged on the floor, the roof and the surrounding walls of the microwave darkroom. The target angular displacement forming device is arranged on the right side of the floor of the microwave darkroom. The target angular displacement forming device is connected to a PXI system in the measurement and control cabinet outside the microwave darkroom through a serial port bus. The radiation antenna in the target angular displacement forming device is connected to a high-frequency unit in the measurement and control cabinet through a line to simulate different positions of a target in space and a motion track of the target in space. The radiation antenna installed on the target angular displacement forming device can simulate an echo signal reflected by the target. A window is arranged on the wall on the left side of the microwave darkroom. The installation fixture on the sliding clamping table clamps the radar seeker to be tested and drives the radar seeker to be tested to enter the microwave darkroom through the window. The radar seeker to be tested is connected to the high-frequency unit and the signal switching unit in the measurement and control cabinet through a cable to test the receiving circuit. Then the radar seeker to be tested is taken off the installation fixture and placed in a shielding device to test the transmitting circuit.

[0007] The comprehensive detection device for the radar seeker, the target angular displacement forming device includes a radiating antenna, a target motion mechanism, a triangular support frame and a servo control circuit, the target motion mechanism is installed with a radiating antenna, the target motion mechanism is installed on the triangular support frame, the target motion mechanism is connected to the servo control circuit through a line, so that the radiating antenna can move continuously and smoothly within a degree of freedom, the moving speed of the simulated target can be continuously adjusted, and the position and movement direction are controlled by the servo control circuit.

[0008] The comprehensive detection device for radar seeker, the clamping table includes a table body, a lateral motion device, a turntable, a mounting fixture, a longitudinal component, a guide rail and an adjustment foot, the four corners below the table body are respectively provided with adjustment feet, two guide rails are spaced apart on the top of the table body, the sliders on the two guide rails are respectively connected to the bottom of the lateral motion device, a turntable is provided on the top of the lateral motion device, a longitudinal component is provided on the top of the turntable, and at least two mounting fixtures are spaced apart on the top of the longitudinal component, by adjusting the longitudinal component, the lateral motion device and the turntable, the radar seeker to be tested clamped in the mounting fixture can be moved in five directions: up and down, front and back, left and right, yaw and roll.

[0009] The comprehensive detection device for radar seeker, the shielding device includes an absorbing pad, a positioning plate, a cylinder, a clamp assembly and a waveguide assembly, a shrinkage is provided at the right end of the cylinder, the shrinkage at the right end of the cylinder is connected to a flange in the waveguide assembly, the flange is connected to a rectangular waveguide circulator, the pyramid horn antenna at the left end of the rectangular waveguide circulator is located in the cylinder, the right end of the rectangular waveguide circulator is located outside the cylinder and connected to two rectangular waveguide directional couplers, one of the rectangular waveguide directional couplers is connected to a rectangular waveguide coaxial converter, the other rectangular waveguide directional coupler is connected to a rectangular waveguide cross coupler, two ports on the rectangular waveguide cross coupler are respectively connected to a rectangular waveguide coaxial converter, a positioning plate is provided inside the cylinder on the left side of the pyramid horn antenna, an absorbing pad is provided on the inner wall of the cylinder, a plurality of rightward recessed clamping grooves are provided at intervals on the left end surface of the cylinder, and a clamp assembly is sleeved on the outer edge surface of the cylinder at the clamping groove.

[0010] The comprehensive detection device for the radar seeker, the measurement and control cabinet includes a PXI system, a high-frequency unit, a signal switching unit, a power distribution module and a system power supply unit. The PXI system is connected to the high-frequency unit and the target angular displacement forming device respectively through a serial bus to realize control of the high-frequency unit and the target angular displacement forming device, and simulates the change of the target echo signal in the speed, angle and distance dimensions; the PXI system is connected to the signal switching unit and the system power supply unit respectively through lines to complete the interaction of information and control instructions between the PXI system and the radar seeker to be tested; the PXI system controls and detects the voltage and current of the radar seeker to be tested through the power distribution module.

[0011] The integrated detection device for radar seeker, the high frequency unit receives the local oscillator signal of the radar seeker to be tested transmitted through the coaxial cable, and controls the electric attenuation to stabilize the power after filtering, amplification and detection in the resonant cavity. The PXI system controls the high frequency unit control module to complete Doppler frequency modulation, noise modulation, pulse modulation, and uses electric attenuation and cascade attenuation to control the output power, and outputs the target echo signal through the coaxial cable to the radiation antenna on the target angular displacement forming device.

[0012] The comprehensive detection device for radar seeker, the system power supply unit includes power supply unit I and power supply unit II, wherein power supply unit I is connected with the PXI system, high frequency unit and signal switching unit, and is used to supply power to the PXI system, high frequency unit and signal switching unit, and power supply unit II is connected with the PXI system and power distribution module, is controlled by the PXI system, completes the setting of power supply parameters, outputs to the power distribution module, and after passing through the signal switching unit, provides the required DC and AC power for the radar seeker to be tested.

[0013] The comprehensive detection device for radar seeker, the power distribution module includes a voltage / current detection unit and a relay module. When the power distribution module receives the control command of the PXI system, the relay is energized, the power supply of the power supply unit II is output one by one, and loaded to the seeker through the signal transfer unit, the voltage and current supplied to the seeker are detected in real time, and the relay can be energized or cut off according to the command;

[0014] The voltage / current detection unit includes a current acquisition board, a voltage sensor combination and an overvoltage and overcurrent protection board. First, the output of the power supply unit II is introduced into the unit, and then the current acquisition board and the voltage sensor combination are used for acquisition and monitoring. The acquired data is sent to the PXI system in one way and to the overvoltage and overcurrent protection board in another way. Then the overvoltage and overcurrent protection board monitors the power output in real time, and the PXI system can store and display the voltage and current data during the test. When there is a power supply abnormality, the overvoltage and overcurrent protection board can quickly cut off the power supply to protect the product.

[0015] The comprehensive detection device for radar seeker, the signal transfer unit includes a signal conditioning module, a limit control circuit and a disturbance signal generating circuit, one end of the signal transfer unit is connected to the PXI system, and the other end is connected to the power distribution module, and the control signal and power supply are transmitted to the external interface signal of the radar seeker to be tested according to the test requirements;

[0016] The signal conditioning module introduces necessary manual control switches, indicator lights, and key signals to the signal transfer unit panel for display, making it easier for testers to control and observe the test status;

[0017] The input end of the limit control circuit is the seeker angle voltage signal UΦ, and the output end is connected to the seeker Break signal to be tested, so that the UΦ voltage is UΦ. down ~U up Normal operation, but less than U down or greater than U up When the limit protection is performed, the internal Break signal of the seeker to be tested is grounded and the control loop is disconnected. Specifically, the angle voltage signal UΦ of the seeker to be tested is connected to the negative input terminal of the U1 operational amplifier through the resistor R1 for amplification. The amplified signal is summed with UΦ and the +12.6V voltage signal. The sum is compared with the 0V voltage in the U2 comparator. When the input voltage is less than UΦ, the voltage is increased by 0V. down When the voltage at U2-2 is greater than 0V, the output of U2-6 is -6V, the Q1 transistor is in the on state, the K1 relay is energized, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection. downWhen the voltage at U2-2 is less than 0V, U2-6 outputs +6V, Q1 transistor is in the cut-off state, K1 relay is disconnected, the internal Break signal of the seeker is disconnected from the ground, and the circuit cancels the limit protection. up When the voltage at U2-2 is greater than 0V, U2-6 outputs -6V, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection;

[0018] The input end of the disturbance signal generating circuit is controlled by the PXI system, and generates 0.5Hz / 0.5V, 1Hz / 1V, and 2Hz / 2V sinusoidal signals respectively, which are output to the inside of the seeker to be tested to form the excitation signal required for the seeker angle loop test. Specifically, the disturbance signal is generated by a Wien bridge oscillation circuit composed of an operational amplifier and an RC frequency selection network, so that the U1 operational amplifier generates a 0.5Hz sinusoidal signal, the U2 operational amplifier generates a 1Hz sinusoidal signal, and the U3 operational amplifier generates a 2Hz sinusoidal signal. The amplitude of the sinusoidal signal is then adjusted by R13, R14, and R24, so that its amplitude is 0.5V, 1V, and 2V respectively, and then the F1, F2, and F3 sent by the PXI system are selected and controlled, so that the output signal F is selected between 0.5Hz / 0.5V, 1Hz / 1V, and 2Hz / 2V.

[0019] The comprehensive detection device for radar seeker, the PXI system includes a PXI chassis, a 0-slot module, an analog quantity acquisition module, a matrix switch module, a 429 communication module and a multi-function acquisition card module. The 0-slot module, the analog quantity acquisition module, the matrix switch module, the 429 communication module and the multi-function acquisition card module are all inserted into the PXI slot of the PXI chassis through a board card strip to form a PXI system. The 0-slot module contains multiple serial port communication interfaces.

[0020] By adopting the above technical solution, the present invention has the following advantages:

[0021] The comprehensive detection device for radar seekers provided by the present invention has the advantages of small size, convenient assembly, accurate measurement in a shielded darkroom in an indoor field, and portable use in an outdoor field, and can perform depth detection on single pulse Doppler radar seekers;

[0022] The present invention adopts the PXI system as the main control system of the test platform, which is firm and shock-resistant, and the modules are easy to plug and replace. Various operations are automatically controlled by the host, and the technical requirements for operators are not high. The system is modularized and standardized, so it is particularly suitable for seeker detection and fault diagnosis tasks. The designed overvoltage and overcurrent protection function can automatically cut off the power supply in the lower computer when the external power supply environment is out of tolerance, or when the product power supply voltage and current are out of tolerance due to other reasons, so as to protect the product and the power supply system in time;

[0023] The clamping table in the present invention is used for fixing the seeker during detection, and can calibrate the mechanical axis of the seeker to be coaxial with the axis of the radiation antenna through an optical calibration device;

[0024] The present invention can detect the search, tracking and target capture performance of the radar seeker, is conducive to fault location, and accelerates the efficiency of fault elimination. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a connection diagram of the radar seeker integrated detection device in an embodiment of the present invention;

[0027] Figure 3 This is a principle block diagram of a limit control circuit in an embodiment of the present invention;

[0028] Figure 4 This is a principle block diagram of a disturbance signal generating circuit in an embodiment of the present invention;

[0029] Figure 5 This is a principle block diagram of a power distribution module in an embodiment of the present invention;

[0030] Figure 6 This is a block diagram of the voltage / current detection principle in an embodiment of the present invention;

[0031] Figure 7 It is a block diagram of the high frequency unit in an embodiment of the present invention;

[0032] Figure 8 A diagram of a radar seeker integrated detection system in an embodiment of the present invention;

[0033] Fig. 9 This is a schematic diagram of the structure of a shielding device in an embodiment of the present invention;

[0034] Fig.10 is a schematic structural diagram of a waveguide assembly in an embodiment of the present invention;

[0035] Fig.11 This is a schematic diagram of the structure of the clamping platform in an embodiment of the present invention;

[0036] Fig.12 for Fig.11 Schematic diagram of the left view structure;

[0037] In the figure: 1. target angular displacement forming device; 2. absorbing layer; 3. microwave darkroom; 4. clamping table; 5. measurement and control cabinet; 6. flange; 7. rectangular waveguide circulator; 8. rectangular waveguide coaxial converter; 9. absorbing pad; 10. positioning plate; 11. cylinder; 12. clamp assembly; 13. table; 14. lateral motion device; 15. turntable; 16. mounting fixture; 17. longitudinal assembly; 18. guide rail; 19. adjustment foot; 20. pyramid horn antenna; 21. rectangular waveguide directional coupler; 22. rectangular waveguide cross coupler. DETAILED DESCRIPTION

[0038] The present invention can be explained in more detail by the following examples, but the present invention is not limited to the following examples;

[0039] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Combined with Figures 1 to 12 ,like Figure 1As shown, a comprehensive detection device for a radar seeker according to the present invention comprises a target angular displacement forming device 1, an absorbing layer 2, a microwave darkroom 3, a clamping table 4 and a measurement and control cabinet 5. The absorbing layer 2 is respectively arranged on the ground, the roof and the surrounding walls of the microwave darkroom 3. The target angular displacement forming device 1 is arranged on the right side of the ground of the microwave darkroom 3. The target angular displacement forming device 1 is connected to a PXI system in the measurement and control cabinet 5 outside the microwave darkroom 3 through a serial port bus. The radiation antenna in the target angular displacement forming device 1 is connected to a high-frequency unit in the measurement and control cabinet 5 through a line. The target is simulated in The different positions in the space and the movement trajectory of the target in the space can be simulated by the radiation antenna installed on the target angular displacement forming device 1. A window is provided on the wall on the left side of the microwave darkroom 3. The mounting fixture 16 on the sliding clamping table 4 clamps the radar seeker to be tested and drives the radar seeker to be tested to enter the microwave darkroom 3 through the window. The radar seeker to be tested is connected to the high-frequency unit and the signal switching unit in the measurement and control cabinet 5 through a cable to test the receiving circuit; then the radar seeker to be tested is removed from the mounting fixture 16 and placed in the shielding device to test the transmitting circuit.

[0042] Furthermore, the target angular displacement forming device 1 includes a radiating antenna, a target motion mechanism, a tripod support frame and a servo control circuit. The target motion mechanism is equipped with a radiating antenna, and the target motion mechanism is installed on the tripod support frame. The target motion mechanism is connected to the servo control circuit through a line to achieve continuous and smooth movement of the radiating antenna within a degree of freedom, and can continuously adjust the moving speed of the simulated target, and control the position and movement direction through the servo control circuit.

[0043] Further, if Fig.11 , 12 As shown, the clamping table 4 includes a table body 13, a lateral motion device 14, a turntable 15, a mounting fixture 16, a longitudinal component 17, a guide rail 18 and an adjustment foot 19. Adjustment feet 19 are respectively provided at the four corners below the table body 13. Two guide rails 18 are spaced apart on the top of the table body 13. Sliders on the two guide rails 18 are respectively connected to the bottom of the lateral motion device 14. A turntable 15 is provided on the top of the lateral motion device 14. A longitudinal component 17 is provided on the top of the turntable 15. At least two mounting fixtures 16 are spaced apart on the top of the longitudinal component 17. By adjusting the longitudinal component 17, the lateral motion device 14 and the turntable 15, the radar seeker to be tested clamped in the mounting fixture 16 can be moved in five directions: up and down, front and back, left and right, yaw and roll.

[0044] Further, if Fig. 9 , 10As shown, the shielding device includes an absorbing pad 9, a positioning plate 10, a cylinder 11, a clamp assembly 12 and a waveguide assembly. A constriction is provided at the right end of the cylinder 11, and the constriction at the right end of the cylinder 11 is connected to a flange 6 in the waveguide assembly. The flange 6 is connected to a rectangular waveguide circulator 7. A pyramid horn antenna 20 at the left end of the rectangular waveguide circulator 7 is located in the cylinder 11. The right end of the rectangular waveguide circulator 7 is located outside the cylinder 11 and is connected to two rectangular waveguide directional couplers 21, one of which is a rectangular waveguide directional coupler. A rectangular waveguide coaxial converter 8 is connected to a rectangular waveguide directional coupler 21, and another rectangular waveguide cross coupler 22 is connected to a rectangular waveguide coaxial converter 8. Two ports on the rectangular waveguide cross coupler 22 are respectively connected to a rectangular waveguide coaxial converter 8. A positioning plate 10 is provided inside the cylinder 11 on the left side of the pyramid horn antenna 20, an absorbing pad 9 is provided on the inner wall of the cylinder 11, and a plurality of clamping grooves recessed to the right are provided at intervals on the left end face of the cylinder 11, and a clamp assembly 12 is sleeved on the outer edge surface of the cylinder 11 at the clamping groove.

[0045] Further, if Figure 2 As shown, the measurement and control cabinet 5 includes a PXI system, a high-frequency unit, a signal switching unit, a power distribution module and a system power supply unit. The PXI system is connected to the high-frequency unit and the target angular displacement forming device 1 respectively through a serial port bus to realize the control of the high-frequency unit and the target angular displacement forming device 1, and simulates the changes of the target echo signal in the speed, angle and distance dimensions; the PXI system is connected to the signal switching unit and the system power supply unit respectively through lines to complete the interaction of information and control instructions between the PXI system and the radar seeker to be tested; the PXI system controls and detects the voltage and current of the radar seeker to be tested through the power distribution module.

[0046] When implementing, Figure 7 As shown, the high-frequency unit receives the local oscillator signal of the radar seeker to be tested transmitted through the coaxial cable, and controls the electric attenuation to stabilize the power after filtering, amplification and detection in the resonant cavity. The PXI system controls the high-frequency unit control module to complete Doppler frequency modulation, noise modulation, pulse modulation, and uses electric attenuation and cascade attenuation to control the output power, and outputs the target echo signal through the coaxial cable to the radiating antenna on the target angular displacement forming device 1.

[0047] Furthermore, the system power supply unit includes a power supply unit I and a power supply unit II, wherein the power supply unit I is connected to the PXI system, the high frequency unit and the signal switching unit, and is used to supply power to the PXI system, the high frequency unit and the signal switching unit; the power supply unit II is connected to the PXI system and the power distribution module, and is controlled by the PXI system to complete the setting of power supply parameters, output to the power distribution module, and after passing through the signal switching unit, provide the required DC and AC power for the radar seeker to be tested.

[0048] Further, if Figure 5 As shown, the power distribution module includes a voltage / current detection unit and a relay module. When the power distribution module receives the control command of the PXI system, the relay is energized, and the power supply of the power supply unit II is output one by one, and loaded to the seeker through the signal transfer unit, and the voltage and current supplied to the seeker are detected in real time, and the relay can be energized or cut off according to the command;

[0049] like Figure 6 As shown, the voltage / current detection unit includes a current acquisition board, a voltage sensor combination and an overvoltage and overcurrent protection board. First, the output of the power supply unit II is introduced into the unit, and then the current acquisition board and the voltage sensor combination are used for acquisition and monitoring. The acquired data is sent to the PXI system in one way and to the overvoltage and overcurrent protection board in another way. Then the overvoltage and overcurrent protection board monitors the power output in real time, and the PXI system can store and display the voltage and current data during the test. When there is a power supply abnormality, the overvoltage and overcurrent protection board can quickly cut off the power supply to protect the product.

[0050] Further, the signal transfer unit includes a signal conditioning module, a limit control circuit and a disturbance signal generating circuit. One end of the signal transfer unit is connected to the PXI system, and the other end is connected to the power distribution module, and the control signal and power supply are transmitted to the external interface signal of the radar seeker to be tested according to the test requirements;

[0051] The signal conditioning module introduces necessary manual control switches, indicator lights, and key signals to the signal transfer unit panel for display, making it easier for testers to control and observe the test status;

[0052] like Figure 3 As shown, the input end of the limit control circuit is the seeker angle voltage signal UΦ, and the output end is connected to the seeker Break signal to be tested, so that the UΦ voltage is UΦ. down ~U up Normal operation, but less than U down or greater than U up When the limit protection is performed, the internal Break signal of the seeker to be tested is grounded and the control loop is disconnected. Specifically, the angle voltage signal UΦ of the seeker to be tested is connected to the negative input terminal of the U1 operational amplifier through the resistor R1 for amplification. The amplified signal is summed with UΦ and the +12.6V voltage signal. The sum is compared with the 0V voltage in the U2 comparator. When the input voltage is less than UΦ, the voltage is increased by 0V. down When the voltage at U2-2 is greater than 0V, the output of U2-6 is -6V, the Q1 transistor is in the on state, the K1 relay is energized, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection. downWhen the voltage at U2-2 is less than 0V, U2-6 outputs +6V, Q1 transistor is in the cut-off state, K1 relay is disconnected, the internal Break signal of the seeker is disconnected from the ground, and the circuit cancels the limit protection. up When the voltage at U2-2 is greater than 0V, U2-6 outputs -6V, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection;

[0053] like Figure 4 As shown, the input end of the disturbance signal generating circuit is controlled by the PXI system, and generates 0.5Hz / 0.5V, 1Hz / 1V, and 2Hz / 2V sinusoidal signals respectively, which are output to the inside of the seeker to be tested to form the excitation signal required for the seeker angle loop test. Specifically, the disturbance signal is generated by a Wien bridge oscillation circuit composed of an operational amplifier and an RC frequency selection network, so that the U1 operational amplifier generates a 0.5Hz sinusoidal signal, the U2 operational amplifier generates a 1Hz sinusoidal signal, and the U3 operational amplifier generates a 2Hz sinusoidal signal. The amplitude of the sinusoidal signal is then adjusted by R13, R14, and R24, so that its amplitude is 0.5V, 1V, and 2V respectively, and then the F1, F2, and F3 sent by the PXI system are selected and controlled, so that the output signal F is selected between 0.5Hz / 0.5V, 1Hz / 1V, and 2Hz / 2V.

[0054] Furthermore, the PXI system includes a PXI chassis, a slot 0 module, an analog acquisition module, a matrix switch module, a 429 communication module and a multi-function acquisition card module. The slot 0 module, the analog acquisition module, the matrix switch module, the 429 communication module and the multi-function acquisition card module are all inserted into the PXI slot of the PXI chassis through a board strip to form a PXI system. The slot 0 module includes multiple serial communication interfaces.

[0055] The specific embodiments of the present invention are as follows:

[0056] The present invention utilizes the software developed by LabVIEW (the software is installed in the PXI system) to realize the automatic detection function of the comprehensive detection device (specifically, Figure 8 In practice, Figure 2As shown, the measurement and control cabinet 5 includes a PXI chassis, a PXI system, a high-frequency unit, a signal switching unit, a power distribution module and a system power supply unit. The PXI system completes system control and communication, and the signal switching unit completes signal interaction between the PXI system and the product; the system power supply unit completes power supply to the system and the product respectively; the PXI system connects the high-frequency unit and the target angular displacement forming device 1 respectively through the serial port bus to realize control of the high-frequency unit and the target angular displacement forming device 1, and simulates the change of the target echo signal in the speed, angle and distance dimensions; the PXI system connects the signal switching unit and the system power supply unit respectively through lines to complete the interaction of information and control instructions between the PXI system and the radar seeker to be measured.

[0057] The LabVIEW software: under Windows 7 operating system, supporting board and controller driver, developed and designed using LabVIEW, includes system self-check module, login module, signal output module, signal acquisition module, system calibration module, system data module, manual test module, and automatic test module.

[0058] The software includes a self-test module to load the initialization information of each bus; a login module for tester login and password setting functions; a signal output module to realize analog signal output and relay control; a signal acquisition module to collect analog signals during the test; a system calibration module to calibrate analog signal acquisition, analog signal output, AC power supply, and DC unit for quick self-calibration; a system data module to complete test result reporting, uploading, and historical data query functions. The test interface includes a manual test module and an automatic test module.

[0059] The manual test module: various equipment parameters and operation procedures can be manually set to allow users to understand the workflow of the seeker in more detail and to manually intervene in the seeker test, mainly for debugging and troubleshooting.

[0060] The automatic test module: automatically tests several parameters of the seeker test, and does not require the user to enter any corresponding equipment parameters. The user only needs to click a button to call the corresponding parameter test module to automatically complete the parameter detection and give the test results. This effectively improves the efficiency of the seeker test and is mostly used for production batch inspection.

[0061] Since LabVIEW software is not the focus of protection of the present invention, it will not be described here in detail.

[0062] Furthermore, the system power supply unit includes power supply unit I and power supply unit II, wherein power supply unit I is connected to the PXI system, the high frequency unit, and the signal switching unit, and is used to supply power to the PXI system, the high frequency combination, and the signal switching unit; power supply unit II is connected to the PXI system and the voltage / current detection unit, and is controlled by the GBIP bus of the PXI system to complete the setting of power supply parameters, and outputs them to the voltage / current detection unit. After passing through the signal switching unit, it provides the required +9V, +15V, ±27V, +50V DC and 36V, 1000Hz AC power for the radar seeker.

[0063] The PXI system is respectively connected with the high frequency unit and the target angular displacement forming device 1, and controls the high frequency unit and the target angular displacement forming device 1 through the RS485 serial bus, simulating the changes of the target echo signal in the dimensions of speed, angle and distance; and is connected with the signal switching unit to complete the interaction of information and control instructions between the PXI system and the radar seeker.

[0064] The power distribution module includes a voltage / current detection unit and a relay module. After receiving the control command of the PXI system, the relay is energized, and the power supply of the power supply unit II is output one by one, and loaded to the guide head through the signal transfer unit. The voltage and current supplied to the guide head are detected in real time, and the relay can be energized or cut off according to the command.

[0065] The voltage / current detection unit includes a current acquisition board, a voltage sensor combination, an overvoltage and overcurrent protection board, etc. First, the output of the power supply unit II is introduced into the unit, and then the current acquisition board (using the WBI121G37 high-precision AC and DC current isolation sensor) and the voltage sensor combination (using the WBV121S07 high-precision AC and DC voltage isolation sensor) are used for acquisition and monitoring. The acquired data is sent to the PXI system in one way and to the overvoltage and overcurrent protection board in another way; then the overvoltage and overcurrent protection board monitors the power output in real time, and the PXI system can store and display the voltage and current data during the test. When there is an abnormal power supply, the overvoltage and overcurrent protection board can quickly cut off the power supply to protect the product.

[0066] The PXI system includes: a PXI chassis, a multi-function acquisition card module, an analog acquisition module, a matrix switch module, a 429 communication module, a 0-slot module, etc. Among them, the 0-slot module includes multiple serial communication interfaces such as RS485, RS232, and GBIP.

[0067] The signal transfer unit includes: a signal conditioning module, a limit control circuit, and a disturbance signal generating circuit. One end of the signal transfer unit is connected to the PXI system, and the other end is connected to the power distribution module. Finally, the test requires that the control signal and power supply be transmitted to the external interface signal of the radar seeker to be tested.

[0068] The signal transfer unit and the signal conditioning module introduce necessary manual control switches, indicator lights, and key signals into the signal transfer unit panel for display, making it easier for testers to control and observe the test status.

[0069] The input end of the limit control circuit is the seeker angle voltage signal UΦ, and the output end is connected to the seeker Break signal to be tested, so that the UΦ voltage is UΦ. down ~U up Normal operation, but less than U down or greater than U up When the limit protection is performed, the internal Break signal of the seeker to be tested is grounded and the control loop is disconnected. Specifically, the angle voltage signal UΦ of the seeker to be tested is connected to the negative input terminal of the U1 operational amplifier through the resistor R1 for amplification. The amplified signal is summed with UΦ and the +12.6V voltage signal. The sum is compared with the 0V voltage in the U2 comparator. When the input voltage is less than UΦ, the voltage is increased by 0V. down When the voltage at U2-2 is greater than 0V, the output of U2-6 is -6V, the Q1 transistor is in the on state, the K1 relay is energized, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection. down When the voltage at U2-2 is less than 0V, U2-6 outputs +6V, Q1 transistor is in the cut-off state, K1 relay is disconnected, the internal Break signal of the seeker is disconnected from the ground, and the circuit cancels the limit protection. up When , the voltage at U2-2 is greater than 0V, U2-6 outputs -6V, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection.

[0070] The integrated detection device for radar seeker, the input end of the disturbance signal generating circuit is controlled by the PXI system, and generates 0.5Hz / 0.5V, 1Hz / 1V, 2Hz / 2V sinusoidal signals respectively, which are output to the inside of the seeker to be tested, forming the excitation signal required for the angle loop test of the seeker. Specifically, the disturbance signal is generated by the Wien bridge oscillation circuit composed of an operational amplifier and an RC frequency selection network, so that the U1 operational amplifier generates a 0.5Hz sinusoidal signal, the U2 operational amplifier generates a 1Hz sinusoidal signal, and the U3 operational amplifier generates a 2Hz sinusoidal signal, and then the amplitude of the sinusoidal signal is adjusted by R13, R14, and R24, so that its amplitude is 0.5V, 1V, and 2V respectively, and then the F1, F2, and F3 sent by the PXI system are selected and controlled, so that the output signal F is selected between 0.5Hz / 0.5V, 1Hz / 1V, and 2Hz / 2V.

[0071] The high-frequency unit receives the local oscillator signal of the seeker transmitted through the coaxial cable. The signal is not less than -20dBm. After filtering, amplification and detection in the resonant cavity, the electric attenuation is controlled to stabilize the power. The PXI system controls the high-frequency unit control module to complete Doppler frequency modulation, noise modulation, pulse modulation, and uses electric attenuation and cascade attenuation to control the output power. The target echo signal is output through the coaxial cable with a dynamic range of up to 120dB and is sent to the radiating antenna of the target angular displacement forming device.

[0072] The shielding device is mainly used for parameter testing when the seeker transmitter is turned on. The outer shape is a thin-walled conical cylinder, the inner wall of the cylinder has absorbing materials, and the shielding attenuation is 40dB. A waveguide horn antenna is installed at the top of the conical cylinder to receive the microwave radiation of the seeker transmitter. The microwave radiation is output to the outside through the waveguide interface and the coaxial cable for power detection; the microwave signal emitted by the seeker is sent to the detector after the rectangular waveguide circulator to be demodulated into a pulse envelope signal for pulse width detection. When in use, the shielding cover is installed on the seeker, and the relative position relationship between the shielding device and the seeker is determined by the positioning plate, and then locked by the clamp assembly.

[0073] The shielding device is composed of a cylinder and a rectangular waveguide circulator. The cylinder is mainly composed of an absorbing pad, a positioning plate, a shell, a clamp assembly, etc.; the rectangular waveguide circulator is composed of a pyramid horn antenna, a rectangular waveguide circulator, a rectangular waveguide directional coupler, a rectangular waveguide coaxial converter, a radio frequency coaxial matching load, a radio frequency pulse envelope detector, etc.

[0074] The target angular displacement forming device 1 is connected to the serial port bus of the PXI system, and its radiating antenna is connected to the high-frequency unit to simulate different positions of the target in space (simulated angle offset ±10°) and the motion trajectory of the target in space (motion speed 10mm~500mm / s). The radiating antenna installed on the target motion mechanism can simulate the echo signal reflected by the target.

[0075] The target angular displacement forming device 1 is composed of three parts: a target motion mechanism, a tripod support frame, and a servo control circuit. The target motion mechanism is installed on the tripod support frame to achieve continuous and smooth movement of the radiating antenna within a degree of freedom, to continuously adjust the moving speed of the simulated target, and to control the position and movement direction through the servo control circuit.

[0076] The clamping table 4 is composed of a table body 13, a lateral motion device 14, a rotating table 15, a longitudinal assembly 17, a mounting fixture 16, an adjustment leg 19, and an optical calibration device. By adjusting the longitudinal assembly 17, the lateral motion device 14, and the rotating table 15, the seeker can move in five directions: up and down, front and back, left and right, yaw, and roll.

[0077] The platform 13 is a metal frame structure, and an adjustment foot 19 is installed at the bottom;

[0078] The lateral motion device 14 is driven by a M24 T-thread, and the guide rail is composed of a dovetail groove to achieve left and right movement.

[0079] The longitudinal assembly 17 is composed of a pulley and a guide rail. The pulley slides forward and backward in the guide rail to achieve forward and backward movement. When it needs to be fixed at a desired position, the brake handle can be tightened to achieve it.

[0080] The turntable 15 can realize horizontal rotation around the Z axis.

[0081] The optical calibration device is composed of a body and a laser, and the optical axis of the laser is adjusted to be coaxial with the body.

[0082] The mounting fixture 16 is composed of a fixture body, an upper half ring of a support, and a lower half ring of a support. The fixture body is a dovetail groove structure, and the lower end of the support is dovetail-shaped and can be conveniently installed on the fixture body. The lower half ring of the support is installed on the upper end of the support and is used to support the guide head. One side of the upper half ring of the support is connected to the lower half ring with a hinge, and the other side is connected with bolts.

[0083] The microwave darkroom 3 is composed of absorbing materials, a frame, and a shielding chamber, and the absorbing materials are fixed on the frame in the shielding chamber. The target angular displacement forming device is placed at one end of the shielding darkroom and aligned with the clamping table. The quiet zone requirement meets the product size requirements.

[0084] The parts not described in detail in this invention are prior art.

[0085] The embodiments selected herein for the purpose of disclosing the invention are currently considered to be suitable, but it should be understood that the invention is intended to include all changes and modifications of the embodiments that fall within the scope of the concept and invention.

Claims

1. A comprehensive detection device for a radar seeker, comprising a target angular displacement forming device (1), a wave absorbing layer (2), a microwave darkroom (3), a clamping table (4) and a measurement and control cabinet (5), wherein: The microwave darkroom (3) is provided with a wave absorbing layer (2) on the floor, the roof and the surrounding walls. A target angular displacement forming device (1) is provided on the right side of the floor of the microwave darkroom (3). The target angular displacement forming device (1) is connected to a PXI system in a measurement and control cabinet (5) located outside the microwave darkroom (3) via a serial bus. The radiation antenna in the target angular displacement forming device (1) is connected to a high-frequency unit in the measurement and control cabinet (5) via a line. Different positions of the target in space and the movement trajectory of the target in space are simulated. By installing a target angular displacement forming device (1) on the target angular displacement forming device (1), the target angular displacement forming device (1) is connected to a PXI system in a measurement and control cabinet (5) located outside the microwave darkroom (3). The radiation antenna on the displacement forming device (1) can simulate the echo signal reflected by the target. A window is provided on the wall on the left side of the microwave darkroom (3). The mounting fixture (16) on the sliding clamping table (4) clamps the radar seeker to be tested and drives the radar seeker to be tested to enter the microwave darkroom (3) through the window. The radar seeker to be tested is connected to the high-frequency unit and the signal switching unit in the measurement and control cabinet (5) through a cable to test the receiving circuit. Then, the radar seeker to be tested is removed from the mounting fixture (16) and placed in the shielding device to test the transmitting circuit. The measurement and control cabinet (5) comprises a PXI system, a high-frequency unit, a signal switching unit, a power distribution module and a system power supply unit. The PXI system is connected to the high-frequency unit and the target angular displacement forming device (1) respectively through a serial bus to realize control of the high-frequency unit and the target angular displacement forming device (1), and simulates the change of the target echo signal in the dimensions of speed, angle and distance. The PXI system is connected to the signal switching unit and the system power supply unit respectively through lines to complete the interaction of information and control instructions between the PXI system and the radar seeker to be tested. The PXI system controls and detects the voltage and current of the radar seeker to be tested through the power distribution module. The signal transfer unit includes a signal conditioning module, a limit control circuit and a disturbance signal generating circuit. One end of the signal transfer unit is connected to the PXI system, and the other end is connected to the power distribution module. The control signal and power supply are transmitted to the external interface signal of the radar seeker to be tested according to the test requirements; The signal conditioning module introduces necessary manual control switches, indicator lights, and key signals to the signal transfer unit panel for display, making it easier for testers to control and observe the test status; The input end of the limit control circuit is the seeker angle voltage signal UΦ, and the output end is connected to the seeker Break signal to be tested, so that the UΦ voltage is UΦ. down ~U up Normal operation, but less than U down or greater than U up When the limit protection is performed, the internal Break signal of the seeker to be tested is grounded, and the control loop is disconnected. Specifically, the angle voltage signal UΦ of the seeker to be tested is connected to the negative input terminal of the U1 operational amplifier through the resistor R1 for amplification. The amplified signal is summed with UΦ and the +12.6V voltage signal. The sum is compared with the 0V voltage in the U2 comparator. When the input voltage is less than UΦ, the voltage signal is summed with the 0V voltage in the U2 comparator. down When the voltage at U2-2 is greater than 0V, the output of U2-6 is -6V, the Q1 transistor is in the on state, the K1 relay is energized, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection. down When the voltage at U2-2 is less than 0V, U2-6 outputs +6V, Q1 transistor is in the cut-off state, K1 relay is disconnected, the internal Break signal of the seeker is disconnected from the ground, and the circuit cancels the limit protection. up When the voltage at U2-2 is greater than 0V, U2-6 outputs -6V, the internal Break signal of the radar seeker to be tested is grounded, and the circuit performs limit protection; The input end of the disturbance signal generating circuit is controlled by the PXI system, and generates 0.5Hz / 0.5V, 1Hz / 1V, and 2Hz / 2V sinusoidal signals respectively, which are output to the inside of the seeker to be tested to form the excitation signal required for the seeker angle loop test. Specifically, the disturbance signal is generated by a Wien bridge oscillation circuit composed of an operational amplifier and an RC frequency selection network, so that the U1 operational amplifier generates a 0.5Hz sinusoidal signal, the U2 operational amplifier generates a 1Hz sinusoidal signal, and the U3 operational amplifier generates a 2Hz sinusoidal signal. The amplitude of the sinusoidal signal is then adjusted by R13, R14, and R24 to be 0.5V, 1V, and 2V respectively, and then F1, F2, and F3 sent by the PXI system are selected and controlled to select the output signal F between 0.5Hz / 0.5V, 1Hz / 1V, and 2Hz / 2V.

2. The integrated detection device for a radar seeker according to claim 1, characterized in that: The target angular displacement forming device (1) comprises a radiating antenna, a target motion mechanism, a triangular support frame and a servo control circuit, wherein the radiating antenna is mounted on the target motion mechanism, the target motion mechanism is mounted on the triangular support frame, and the target motion mechanism is connected to the servo control circuit via a line, so that the radiating antenna can move continuously and smoothly within a range of freedom, the moving speed of the simulated target can be continuously adjusted, and the position and moving direction can be controlled by the servo control circuit.

3. The integrated detection device for a radar seeker according to claim 1, characterized in that: The clamping table (4) comprises a table body (13), a lateral motion device (14), a rotating table (15), a mounting fixture (16), a longitudinal component (17), a guide rail (18) and an adjustment foot (19). Adjustment feet (19) are respectively provided at the four corners below the table body (13). Two guide rails (18) are spaced apart on the top of the table body (13). Sliders on the two guide rails (18) are respectively connected to the bottom of the lateral motion device (14). A rotating table (15) is provided on the top of the lateral motion device (14). A longitudinal component (17) is provided on the top of the rotating table (15). At least two mounting fixtures (16) are spaced apart on the top of the longitudinal component (17). By adjusting the longitudinal component (17), the lateral motion device (14) and the rotating table (15), the radar seeker to be tested clamped in the mounting fixture (16) can be moved in five directions: up and down, front and back, left and right, yaw and roll.

4. The integrated detection device for a radar seeker according to claim 1, characterized in that: The shielding device comprises an absorbing pad (9), a positioning plate (10), a cylinder (11), a clamp assembly (12) and a waveguide assembly, wherein a constriction is provided at the right end of the cylinder (11), the constriction at the right end of the cylinder (11) is connected to a flange (6) in the waveguide assembly, the flange (6) is connected to a rectangular waveguide circulator (7), a pyramidal horn antenna (20) at the left end of the rectangular waveguide circulator (7) is located inside the cylinder (11), and the right end of the rectangular waveguide circulator (7) is located outside the cylinder (11) and is connected to two rectangular waveguide directional couplers (21), wherein one of the rectangular waveguide directional couplers is connected to the rectangular waveguide circulator (7). A rectangular waveguide coaxial converter (8) is connected to a rectangular waveguide directional coupler (21), another rectangular waveguide cross coupler (22), two ports on the rectangular waveguide cross coupler (22) are respectively connected to a rectangular waveguide coaxial converter (8), a positioning plate (10) is provided inside the left cylinder (11) of the pyramid horn antenna (20), an absorbing pad (9) is provided on the inner wall of the cylinder (11), a plurality of rightwardly recessed clamping grooves are provided at intervals on the left end surface of the cylinder (11), and a clamp assembly (12) is sleeved on the outer edge surface of the cylinder (11) at the clamping groove.

5. The integrated detection device for a radar seeker according to claim 1, characterized in that: The high frequency unit receives the local oscillator signal of the radar seeker to be tested transmitted via the coaxial cable, and controls the electric attenuation to stabilize the power after filtering, amplification and detection in the resonant cavity. The PXI system controls the high frequency unit control module to complete Doppler frequency modulation, noise modulation, pulse modulation, and uses electric attenuation and cascade attenuation to control the output power, and outputs the target echo signal via the coaxial cable to the radiation antenna on the target angular displacement forming device (1).

6. The integrated detection device for a radar seeker according to claim 1, characterized in that: The system power supply unit includes a power supply unit I and a power supply unit II, wherein the power supply unit I is connected to the PXI system, the high frequency unit and the signal switching unit, and is used to supply power to the PXI system, the high frequency unit and the signal switching unit; the power supply unit II is connected to the PXI system and the power distribution module, and is controlled by the PXI system to complete the setting of power supply parameters, output to the power distribution module, and provide the required DC and AC power to the radar seeker to be tested after passing through the signal switching unit.

7. The integrated detection device for a radar seeker according to claim 1, characterized in that: The power distribution module includes a voltage / current detection unit and a relay module. When the power distribution module receives a control command from the PXI system, the relay is closed, and the power supply of the power supply unit II is output one by one, and loaded to the seeker through the signal transfer unit, and the voltage and current supplied to the seeker are detected in real time, and the relay can be closed or cut off according to the command; The voltage / current detection unit includes a current acquisition board, a voltage sensor combination and an overvoltage and overcurrent protection board. First, the output of the power supply unit II is introduced into the unit, and then the current acquisition board and the voltage sensor combination are used for acquisition and monitoring. The acquired data is sent to the PXI system in one way and to the overvoltage and overcurrent protection board in another way. Then the overvoltage and overcurrent protection board monitors the power output in real time, and the PXI system can store and display the voltage and current data during the test. When there is a power supply abnormality, the overvoltage and overcurrent protection board can quickly cut off the power supply to protect the product.

8. The integrated detection device for a radar seeker according to claim 1, characterized in that: The PXI system includes a PXI chassis, a slot 0 module, an analog acquisition module, a matrix switch module, a 429 communication module and a multi-function acquisition card module. The slot 0 module, the analog acquisition module, the matrix switch module, the 429 communication module and the multi-function acquisition card module are all inserted into the PXI slot of the PXI chassis through a board slot, and the slot 0 module includes multiple serial communication interfaces.

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