Ground detection method for radar guidance assembly

Abstract

The invention discloses a ground detection method for a radar guidance assembly, and relates to the technical field of measurement and control, the ground detection device for the radar guidance assembly provided by the invention has the characteristics of small size and convenient assembly, can utilize a shielding darkroom to perform accurate measurement in an inner field, is portable to use in an outer field, can perform depth detection on a monopulse Doppler radar guidance assembly, and has a wide application prospect. The detection comprises detection of transmitter performance, a receiving loop speed channel, a receiving loop angle channel and a servo system; according to the invention, the performance of a transmitter, a receiving loop speed channel, a receiving loop angle channel and a servo system can be checked by detecting the internal and external field performance of the radar guidance assembly; according to the method, the radar guidance assembly can be detected in a distributed manner, fault positioning is facilitated, and the fault removal efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of measurement and control technology, and in particular to a ground detection method for a radar guidance component. Background Art

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

[0003] In the inspection of certain types of aviation equipment, due to the limited inspection depth, only functional indicators can be inspected, the error is large, the inspection depth is limited, and the performance of major components cannot be covered, especially for radar guidance components that are crucial to the effectiveness of equipment. It is impossible to quantitatively complete the closed-loop inspection of various functional circuits of the radar guidance components. At the same time, for the existing ground inspection method of radar guidance components, there is a separate panel that needs to design a ground inspection device. By commanding and controlling the radar guidance component to simulate the working state, and adjusting the target simulator, the entire device can complete the inspection of the transmitter performance of the radar guidance component, the receiving circuit speed channel, the receiving circuit angle channel and the servo system in simulating the dynamic work of the aviation equipment. Summary of the invention

[0004] In order to overcome the deficiencies in the background technology, the present invention provides a ground detection method for a radar guidance component, which is used to detect the performance of the radar guidance component.

[0005] In order to achieve the above-mentioned purpose of the invention, the present invention adopts the following technical solution: A ground detection method for a radar guidance component, the ground detection method specifically comprising the following steps: The first step is to connect the power supply unit of the ground detection device; Step 2: Turn on the PXI system, high frequency unit and target angular displacement forming device; Step 3: Turn on the signal transfer unit; Step 4: Power the radar guidance components; Step 5: Use the PXI system to exchange information with the radar guidance component, and perform the receiving loop speed channel detection, receiving loop angle channel detection, and servo system detection item by item in the shielded darkroom. After the test is completed, the radar guidance component is powered off; Step 6: Assemble the radar guidance assembly with a shielding device; Step 7: Re-power the radar guidance component, use the PXI system to exchange information with the radar guidance component, test the transmitter performance, record the radiation power by assembling the shielding device, and power off the radar guidance component after the test is completed; Step 8: Record, display and interpret data through the detection device.

[0006] The ground detection method for radar guidance components, in the first step, the ground detection device includes a PXI system, a system power supply unit, a shielding device, a high-frequency unit, a signal switching unit, a voltage / current detection unit, a clamping table, a target angular displacement forming device and a shielded darkroom, the PXI system is connected to the system power supply unit, the 0-slot module in the PXI system is respectively connected to the high-frequency unit and the target angular displacement forming device through lines, the target angular displacement forming device is arranged in the shielded darkroom, the high-frequency unit is respectively connected to the target angular displacement forming device and the radar guidance component, the analog acquisition module, the matrix switch module, the 429 communication module and The multifunctional acquisition card module is connected to the signal transfer unit, the signal transfer unit is respectively connected to the voltage / current detection unit and the radar guidance component, the voltage / current detection unit is connected to the system power supply unit, the radar guidance component is installed on a clamping table located outside the shielded darkroom, a window is provided on the wall on the left side of the shielded darkroom, the installation fixture on the clamping table clamps the radar guidance component to be tested and drives the radar guidance component to be tested to enter the shielded darkroom through the window, the radar guidance component to be tested is connected to the high-frequency unit and the signal transfer unit through a cable to test the receiving circuit; then the radar guidance component to be tested is removed from the installation fixture and placed in the shielding device to test the transmitting circuit.

[0007] The ground detection method for radar guidance components, the system power supply unit includes power supply unit I and power supply unit II, the power supply unit I is connected with 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 with the PXI system and the voltage / current detection unit, is controlled by the PXI system, completes the setting of power supply parameters, and outputs through the power monitoring unit and enters the signal switching unit, so as to provide various DC or AC power supplies required for the radar guidance components.

[0008] In the ground detection method for radar guidance components, the PXI system is respectively connected to the high-frequency unit, the target angular displacement forming device, and the signal switching unit, and the control of the high-frequency unit and the target angular displacement forming device is completed through the serial port bus to simulate the changes in the angle and speed of the target echo signal; by connecting with the signal switching unit, the interaction of information and control instructions between the PXI system and the radar guidance component is completed.

[0009] The ground detection method for radar guidance components, the signal transfer unit is connected to the PXI system, controls the radar guidance components and collects information according to signal characteristics and requirements, provides necessary manual control switches, indicator lights and excitation signals to complete power supply control of the radar guidance components, and the other end is connected to the external interface signal of the radar guidance components to form a controlled disturbance signal to be sent to the guidance components.

[0010] In the ground detection method for radar guidance components, the high-frequency unit is connected to the local oscillator signal of the radar guidance component, simulates and outputs the target echo signal, receives the control command of the PXI system and sends back various status information of the subsystem.

[0011] The ground detection method for radar guidance components, the target angular displacement forming device is connected to the serial port bus of the PXI system, simulating different positions of the target in space and the movement trajectory of the target in space, and simulating the echo signal reflected by the target through the radiation antenna installed on the target movement mechanism, and the radiation antenna is connected to the high-frequency unit.

[0012] The ground detection method for the radar guidance component, the steps of detecting the speed channel of the receiving loop of the radar guidance component in the fifth step are as follows: The first step is to make the radar guidance assembly face upward in the missile body coordinate system, and align the "X axis" with the radiation antenna of the target angular displacement forming device; Step 2: The detection device powers on the radar guidance component, binds the target characteristic information of "Task 1", and sets the target characteristic information of "Task 1" to the high frequency combination at the same time, and the signal strength is medium; Step 3: The detection device issues an "allow interception" command to the radar guidance component, so that after intercepting the target, the radar guidance component servo mechanism is locked, and the high-frequency combined attenuation is increased. After the radar guidance component loses the target, the high-frequency combined attenuation is reduced again. After intercepting the target again, the target echo signal strength P0 is recorded at this time, and converted into the receiving loop sensitivity Psensitivity through field calibration; Step 4: The detection device further reduces the high-frequency combined attenuation so that the target echo signal strength is (P sensitivity + N); Step 5: The detection device further adjusts the high-frequency combined Doppler change rate, and sweeps the frequency in positive and negative directions to detect the interception stability; Step 6: The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

[0013] The ground detection method for the radar guidance component, the steps of detecting the angle channel of the receiving loop of the radar guidance component in the fifth step are as follows: The first step is that the detection device powers on the radar guidance component, binds the "Task 2" target characteristic information, sets the "Task 2" target characteristic information to the high-frequency combination, and sets the target echo signal strength to (P sensitivity + N). After intercepting the target, the offset signal at this time is detected; Step 2: Set the target echo signal strength to P sensitivity and (P sensitivity + M) respectively, and detect the misalignment signal respectively; Step 3: Take the difference of each channel and compare the offset with the initial strong signal line to check whether it meets the technical requirements: Step 4: The detection device powers on the radar guidance component, binds the target characteristic information of "Task 3", and sets the target characteristic information of "Task 3" to the high frequency combination at the same time, and then intercepts the target; Step 5: The detection device controls the radiating antenna of the target angular displacement forming device to shift a certain angle θ1 in the positive and negative directions respectively, sets the target echo signal strength to (P sensitivity + N), detects the detuning signal at this time, and calculates the direction finding slope K1; Step 6: The detection device controls the positive and negative direction offsets of the radiating antenna of the target angular displacement forming device by θ2, sets the target echo signal strength to (P sensitivity + N), detects the detuning signal at this time, and calculates the direction finding slope K2; Step 7: The detection device controls the positive and negative direction offsets of the radiating antenna of the target angular displacement forming device by θ1, sets the target echo signal strength to P sensitivity, detects the detuning signal at this time, and calculates the direction finding slope K3; Step 8: The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

[0014] The ground detection method for the radar guidance component, the steps of detecting the radar guidance component servo system in the fifth step are as follows: Step 1: The detection device powers on the radar guidance component and binds the target characteristic information of "Task 4". After the servo mechanism moves into place, it binds the target characteristic information of "Task 5". The data α is recorded with the start time of antenna deflection; the data β is recorded with the end time △T of antenna stopping rotation, and the antenna rotation angular velocity ω is calculated (ω=︱α-β︱ / △T), to determine whether the servo system meets the technical requirements. Step 2: The detection device powers on the radar guidance component and binds the target characteristic information of "Task 5". After the servo mechanism moves into place, the disturbance signal generated inside the signal transfer unit is connected to the Y and Z receiving channels respectively, and the output signal U' of the measurement amplifier inside the radar guidance component is measured. i After disconnecting the "power" button of the signal transfer unit, measure the output signal U" of the internal measurement amplifier of the radar guidance component again. i , calculate the projectile coupling coefficient (δi =U′ i / U″ i ) whether the technical requirements are met.

[0015] By adopting the above technical solution, the present invention has the following advantages: The ground detection device of the radar guidance component provided in the present invention has the characteristics of small size and convenient assembly. It can be accurately measured in the indoor field using a shielded darkroom and can be used in the outdoor field in a portable manner. It can perform in-depth detection of the single pulse Doppler radar guidance component, including detection of transmitter performance, receiving loop speed channel, receiving loop angle channel, and servo system. The present invention can check the performance of the transmitter, the speed channel of the receiving loop, the angle channel of the receiving loop, and the performance of the servo system by detecting the internal and external field performance of the radar guidance component; The present invention can complete the detection of radar guidance components in a distributed manner, which is beneficial to fault location and accelerates the efficiency of fault elimination. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a ground detection device for a radar guidance component according to an embodiment of the present invention; Figure 2 is a schematic diagram of a panel of a signal switching unit in an embodiment of the present invention; Figure 3 It is a schematic flow chart of the steps of a testing method using a ground detection device for a radar guidance component in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention can be explained in more detail by the following examples, but the present invention is not limited to the following examples; In specific practice, a certain type of mass-produced radar guidance components is detected using the method described in the present invention, which improves the detection efficiency and detection depth, and on this basis, the automatic detection line is iterated. At the same time, in the field, according to the use environment, there is no need for a shielded darkroom, and the functions can be increased or decreased, meeting the characteristics of easy carrying, safety, firmness, and simple operation in the field, and exerting a better use effect.

[0018] Combined with Figures 1 to 3 The present invention provides a ground detection method for a radar guidance component, wherein the ground detection method specifically comprises the following steps: The first step is to connect the power supply unit of the ground detection device; Step 2: Turn on the PXI system, high frequency unit and target angular displacement forming device; Step 3: Turn on the signal transfer unit; Step 4: Power the radar guidance components; Step 5: Use the PXI system to exchange information with the radar guidance component, and perform the receiving loop speed channel detection, receiving loop angle channel detection, and servo system detection item by item in the shielded darkroom. After the test is completed, the radar guidance component is powered off; In practice, the steps for detecting the speed channel of the radar guidance component receiving loop are as follows: 1) Make the radar guidance assembly face upward on the “Y axis” of the missile body coordinate system, and align the “X axis” with the radiating antenna of the target angular displacement forming device; 2) The detection device powers on the radar guidance component, binds the target characteristic information of "Task 1", and sets the target characteristic information of "Task 1" to the high frequency combination at the same time, and the signal strength is medium; 3) The detection device issues an "allow interception" command to the radar guidance component, so that after intercepting the target, the radar guidance component servo mechanism is locked and the high-frequency combined attenuation is increased. After the radar guidance component loses the target, the high-frequency combined attenuation is reduced again. After intercepting the target again, the target echo signal strength P0 is recorded at this time and converted into the receiving loop sensitivity Psensitivity through field calibration; 4) The detection device further reduces the high-frequency combined attenuation so that the target echo signal strength is (P sensitivity + N); 5) The detection device further adjusts the high-frequency combined Doppler change rate, sweeps the frequency in positive and negative directions, and detects the interception stability; 6) The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

[0019] Further, the steps for detecting the angle channel of the receiving loop of the radar guidance component are as follows: 1) The detection device powers on the radar guidance component, binds the target characteristic information of "Task 2", sets the target characteristic information of "Task 2" to the high frequency combination, and sets the target echo signal strength to (P sensitivity + N). After intercepting the target, the detuning signal at this time is detected; 2) Set the target echo signal strength to P sensitivity and (P sensitivity + M) respectively, and detect the offset signal respectively; 3) Take the difference of each channel and compare the offset with the initial equal-strength signal line to check whether it meets the technical requirements: 4) The detection device powers on the radar guidance component, binds the "mission 3" target characteristic information, and sets the "mission 3" target characteristic information to the high frequency combination, and then intercepts the target; 5) The detection device controls the radiating antenna of the target angular displacement forming device to shift a certain angle θ1 in the positive and negative directions respectively, sets the target echo signal strength to (P sensitivity + N), detects the detuning signal at this time, and calculates the direction finding slope K1; 6) The detection device controls the positive and negative direction offsets of the radiating antenna of the target angular displacement forming device by θ2, sets the target echo signal strength to (P sensitivity + N), detects the detuning signal at this time, and calculates the direction finding slope K2; 7) The detection device controls the positive and negative direction offsets of the radiating antenna of the target angular displacement forming device by θ1, sets the target echo signal strength to P sensitivity, detects the detuning signal at this time, and calculates the direction finding slope K3; 8) The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

[0020] Further, the steps for detecting the radar guidance component servo system are as follows: 1) The detection device powers on the radar guidance component and binds the target characteristic information of "Task 4". After the servo mechanism moves into place, it binds the target characteristic information of "Task 5". The data α is recorded with the start time of antenna deflection; the data β is recorded with the end time △T of antenna stopping rotation, and the angular velocity ω of the antenna rotation is calculated (ω=︱α-β︱ / △T), to determine whether the servo system meets the technical requirements; 2) The detection device powers on the radar guidance component and binds the target characteristic information of "Task 5". After the servo mechanism moves into place, the disturbance signal generated inside the signal transfer unit is connected to the Y and Z receiving channels respectively, and the output signal U' of the measurement amplifier inside the radar guidance component is measured. i After disconnecting the "power" button of the signal transfer unit, measure the output signal U" of the internal measurement amplifier of the radar guidance component again. i , calculate the projectile coupling coefficient (δ i =U′ i / U″ i ) whether the technical requirements are met.

[0021] Step 6: Assemble the radar guidance assembly with a shielding device; Step 7: Re-power the radar guidance component, use the PXI system to exchange information with the radar guidance component, test the transmitter performance, record the radiation power by assembling the shielding device, and power off the radar guidance component after the test is completed; Step 8: Record, display and interpret data through the detection device.

[0022] When implementing, Figure 1As shown, the ground detection device in the first step includes a PXI system, a system power supply unit, a shielding device, a high-frequency unit, a signal transfer unit, a voltage / current detection unit, a clamping table, a target angular displacement forming device and a shielded darkroom. The PXI system is connected to the system power supply unit. The 0-slot module in the PXI system is respectively connected to the high-frequency unit and the target angular displacement forming device through lines. The target angular displacement forming device is arranged in the shielded darkroom. The high-frequency unit is respectively connected to the target angular displacement forming device and the radar guidance component. The analog acquisition module, matrix switch module, 429 communication module and multi-function acquisition card module in the PXI system A signal transfer unit is connected, the signal transfer unit is respectively connected to a voltage / current detection unit and a radar guidance component, the voltage / current detection unit is connected to a system power supply unit, the radar guidance component is installed on a clamping table located outside the shielded darkroom, a window is provided on the wall on the left side of the shielded darkroom, the mounting fixture on the clamping table clamps the radar guidance component to be tested and drives the radar guidance component to be tested through the window into the shielded darkroom, the radar guidance component to be tested is connected to the high-frequency unit and the signal transfer unit through a cable to test the receiving circuit; then the radar guidance component to be tested is removed from the mounting fixture and placed in the shielding device to test the transmitting circuit.

[0023] Furthermore, the system power supply unit includes a power supply unit I and a power supply unit II. 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 voltage / current detection unit, and is controlled by the PXI system to complete the setting of power supply parameters, and outputs through the power supply monitoring unit and enters the signal switching unit to provide various required DC or AC power supplies for the radar guidance components.

[0024] Furthermore, the PXI system is respectively connected to the high-frequency unit, the target angular displacement forming device, and the signal switching unit, and controls the high-frequency unit and the target angular displacement forming device through the serial port bus to simulate the changes in the angle and speed of the target echo signal; and by connecting to the signal switching unit, the interaction of information and control instructions between the PXI system and the radar guidance component is completed.

[0025] Furthermore, the panel of the signal transfer unit is as follows Figure 2As shown, the signal transfer unit is connected to the PXI system, providing the necessary manual control switch, indicator light and excitation signal, completing the power supply and command control of the radar guidance component, and collecting some signals. The manual control switch includes the power and current switch for controlling the servo system of the radar guidance component, the DC1 and DC2 switches for power supply, the radiation switch for power on, the air cooling and liquid cooling control switches required for long power-on time, and the disturbance signal loading switch for controlling the access of the disturbance signal; the indicator lights include the self-test, interception, limit, and radiation indicator lights for feedback of the working status of the radar guidance component, and the Y and Z channel angle indicators; in order to facilitate fault diagnosis, test holes and test sockets are designed to lead out the radar guidance component signal for detection. The other end is connected to the external interface signal of the radar guidance component, which can form a controlled disturbance signal and send it to the guidance component.

[0026] Furthermore, the high frequency unit is connected to the local oscillator signal of the radar guidance component, simulates and outputs the target echo signal, receives the control command of the PXI system and sends back various status information of the subsystem.

[0027] Furthermore, the target angular displacement forming device is connected to the serial port bus of the PXI system to simulate different positions of the target in space and the motion trajectory of the target in space, and simulates the echo signal reflected by the target through a radiating antenna installed on the target motion mechanism, and the radiating antenna is connected to the high-frequency unit.

[0028] In specific practice, the speed channel detection of the receiving loop of the radar guidance component adopts: Make the radar guidance assembly point upwards on the "Y axis" of the missile body coordinate system, and align the "X axis" with the radiating antenna of the target angular displacement forming device; The detection device powers on the radar guidance component, binds the target characteristic information of "mission 1", and sets the target characteristic information of "mission 1" to the high frequency combination at the same time, and the signal strength is medium strength; The detection device issues an "allow interception" command to the radar guidance component, so that after intercepting the target, it locks the radar guidance component servo mechanism and increases the high-frequency combined attenuation. After the radar guidance component loses the target, it decreases the high-frequency combined attenuation again. After intercepting the target again, the target echo signal strength P0 is recorded at this time, which is the receiving loop sensitivity P 灵敏度 ; The detection device further reduces the high frequency combined attenuation to make the target echo signal strength (P 灵敏度 +30); The detection device further adjusts the high frequency combined Doppler change rate, and sweeps the frequency in positive and negative directions respectively to detect the interception stability; The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

[0029] Furthermore, the angle channel detection of the receiving loop of the radar guidance component is adopted: The detection device powers on the radar guidance component, binds the "Task 2" target characteristic information, sets the "Task 2" target characteristic information to the high frequency combination, and sets the target echo signal strength to (P 灵敏度 +40), after intercepting the target, detect the imbalance information DEY, DEZ at this time; Set the target echo signal strength to P 灵敏度 , detect the imbalance information DEY0, DEZ0 at this time; Set the target echo signal strength to (P 灵敏度 +80), detect the imbalance information DEY1 and DEZ1 at this time; Use the following formula to calculate whether the offset of equal strong signal line meets the technical requirements: △DEY′= ︱DEY′-DEY︱; △DEZ′ = ︱DEZ′-DEZ︱; △DEY ″= ︱DEY″-DEY︱; △DEZ ″= ︱DEZ″-DEZ︱; The detection device powers on the radar guidance component, binds the "mission 3" target characteristic information, and sets the "mission 3" target characteristic information to the high frequency combination at the same time, after intercepting the target; The detection device controls the radiating antenna of the target angular displacement forming device to shift 1.4° in the positive and negative directions, and sets the target echo signal strength to (P 灵敏度 +40), detect the imbalance information DEi1, DEi2 (i=Y, Z.); S 测向斜率1 =(︱DEi1︱+︱DEi2︱) / 2; The detection device controls the radiating antenna of the target angular displacement forming device to shift 2.8° in the positive and negative directions, and sets the target echo signal strength to (P 灵敏度 ), detect the imbalance information DEi3 and DEi4 at this time; S 测向斜率2 =(︱DEi3︱+︱DEi4︱) / 4; The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

[0030] Further, the radar guidance component servo system detection adopts: The detection device powers on the radar guidance component and binds the target characteristic information of "Task 4". After the servo mechanism moves into place, it binds the target characteristic information of "Task 5". The data α is recorded with the start time of the antenna deflection; the data β is recorded with the end time △T of the antenna stopping rotation. The two channels are measured respectively, and the antenna rotation angular velocity ω is calculated using the following formula to determine whether the servo system meets the technical requirements; ω=︱α-β︱ / △T; The detection device powers on the radar guidance component and binds the target characteristic information of "Task 5". After the servo mechanism moves into place, the disturbance signals 1V and 1Hz generated inside the signal transfer unit are connected to the Y and Z receiving channels respectively, and the output signal U' of the measurement amplifier inside the radar guidance component is measured. Y、 U′ Z After disconnecting the "power" button of the signal transfer unit, measure the output signal U" of the internal measurement amplifier of the radar guidance component again. Y、 U″ Z , calculate the projectile coupling coefficient according to the following formula to see whether it meets the technical requirements; δ Y =U′ Y / U″ Y δ Z =U′ Z / U″ Z In the specific practice of the present invention, the radar guidance component ground detection device is a set of automatic test equipment using the PXI bus as a test platform, which includes a PXI system, a high-frequency combination, a signal switching unit, a shielding device, a target angular displacement forming device, a system power supply unit, a clamping table, and a shielding darkroom.

[0031] 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, high-frequency combination, and signal switching unit to supply power to the PXI system, high-frequency combination, and signal switching unit, and power supply unit II is connected to the PXI system and power supply monitoring unit, is controlled by the PXI system, completes the setting of power supply parameters, and outputs through the power supply monitoring unit and enters the signal switching unit to provide various DC and AC power supplies required for the radar guidance components.

[0032] The PXI system is respectively connected to the high-frequency combination, the target angular displacement forming device, and the signal switching unit, and controls the high-frequency combination and the target angular displacement forming device through the serial port bus to simulate the changes in the angle and speed of the target echo signal; and is connected to the signal switching unit to complete the interaction of information and control instructions between the PXI system and the radar guidance component.

[0033] The PXI system includes: a PXI chassis, a multifunctional 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 a variety of serial communication interfaces.

[0034] The signal transfer unit is connected to the PXI system, controls the radar guidance component and collects information according to the signal characteristics and requirements, provides necessary manual control switches, indicator lights and excitation signals to complete the power supply control of the radar guidance component, and the other end is connected to the external interface signal of the radar guidance component to form a controlled disturbance signal and send it to the guidance component.

[0035] The high frequency combination is connected with the local oscillator signal of the radar guidance component, simulates and outputs the target echo signal, receives the control command of the PXI system and sends back various status information of the subsystem.

[0036] The shielding device described: The shielding device is used when detecting the performance of the transmitter, the purpose of which is to ensure the safety of maintenance personnel and complete signal collection.

[0037] The target angular displacement forming device is connected to the serial bus of the PXI system to simulate different positions of the target in space and the target's motion trajectory in space. The radiation antenna installed on the target motion mechanism can simulate the echo signal reflected by the target, and the radiation antenna is connected to the high-frequency combination.

[0038] The clamping table is composed of a table body, a longitudinal component, a transverse motion device, a rotating table, a mounting fixture, and an optical calibration device. By adjusting the longitudinal component, the transverse motion device, and the rotating table, the radar guidance component can be moved in four directions: front and back, left and right, yaw, and roll, to ensure that the X-axis of the radar guidance component is aligned with the radiation antenna.

[0039] The metal frame structure of the platform is provided with spiral feet and universal wheels at the bottom; The lateral motion device is driven by M24 T-thread and the guide rail is composed of dovetail grooves to ensure transmission accuracy.

[0040] The longitudinal component is composed of a pulley and a guide rail. The pulley slides back and forth in the guide rail to achieve forward and backward movement. When it needs to be fixed in the required position, the brake handle can be tightened to achieve it.

[0041] The turntable can realize horizontal rotation around the Z axis with an indication accuracy of less than 0.1°.

[0042] The optical calibration device consists of a body and a laser, and the optical axis of the laser is adjusted to be coaxial with the body.

[0043] The mounting fixture consists 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 radar guidance component. 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.

[0044] The shielding darkroom is composed of absorbing materials, a frame and a shielding room, wherein the absorbing materials are fixed on the frame in the shielding room. The target angular displacement forming device is placed at one end of the shielding darkroom and aligned with the clamping table.

[0045] It should be noted that the applicant for the ground detection device involved in the present invention has separately applied for a patent, so it will not be repeated here.

[0046] Parts of the present invention not described in detail are prior art.

[0047] 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 ground detection method for a radar guidance component, characterized in that: The ground detection method specifically comprises the following steps: The first step is to connect the power supply unit of the ground detection device; Step 2: Turn on the PXI system, high frequency unit and target angular displacement forming device; Step 3: Turn on the signal transfer unit; Step 4: Power the radar guidance components; Step 5: Use the PXI system to exchange information with the radar guidance component, and perform the receiving loop speed channel detection, receiving loop angle channel detection, and servo system detection item by item in the shielded darkroom. After the test is completed, the radar guidance component is powered off; Step 6: Assemble the radar guidance assembly with a shielding device; Step 7: Re-power the radar guidance component, use the PXI system to exchange information with the radar guidance component, test the transmitter performance, record the radiation power by assembling the shielding device, and power off the radar guidance component after the test is completed; Step 8: Record, display and interpret data through the detection device.

2. The ground detection method for a radar guidance component according to claim 1, characterized in that: In the first step, the ground detection device includes a PXI system, a system power supply unit, a shielding device, a high-frequency unit, a signal transfer unit, a voltage / current detection unit, a clamping table, a target angular displacement forming device and a shielded darkroom. The PXI system is connected to the system power supply unit. The 0-slot module in the PXI system is respectively connected to the high-frequency unit and the target angular displacement forming device through lines. The target angular displacement forming device is arranged in the shielded darkroom. The high-frequency unit is respectively connected to the target angular displacement forming device and the radar guidance component. The analog acquisition module, the matrix switch module, the 429 communication module and the multi-function acquisition card module in the PXI system are connected A signal transfer unit, wherein the signal transfer unit is respectively connected to a voltage / current detection unit and a radar guidance component, the voltage / current detection unit is connected to a system power supply unit, the radar guidance component is mounted on a clamping table located outside the shielded darkroom, a window is provided on the wall on the left side of the shielded darkroom, a mounting fixture on the clamping table clamps the radar guidance component to be tested and drives the radar guidance component to be tested to enter the shielded darkroom through the window, the radar guidance component to be tested is connected to the high-frequency unit and the signal transfer unit through a cable to test the receiving circuit; then the radar guidance component to be tested is removed from the mounting fixture and placed in a shielding device to test the transmitting circuit.

3. The ground detection method for a radar guidance component according to claim 2, characterized in that: The system power supply unit includes a power supply unit I and a power supply unit II. The power supply unit I is connected to the PXI system, the high-frequency unit, and the signal switching unit 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 voltage / current detection unit and is controlled by the PXI system to complete the setting of power supply parameters and output through the power supply monitoring unit to enter the signal switching unit to provide various DC or AC power supplies required for the radar guidance components.

4. The ground detection method for a radar guidance component according to claim 2, characterized in that: The PXI system is respectively connected with the high-frequency unit, the target angular displacement forming device and the signal switching unit, and controls the high-frequency unit and the target angular displacement forming device through the serial port bus to simulate the changes in the angle and speed of the target echo signal; and is connected with the signal switching unit to complete the interaction of information and control instructions between the PXI system and the radar guidance component.

5. The ground detection method for a radar guidance component according to claim 2, characterized in that: The signal transfer unit is connected to the PXI system, controls the radar guidance component and collects information according to the signal characteristics and requirements, provides necessary manual control switches, indicator lights and excitation signals to complete the power supply control of the radar guidance component, and the other end is connected to the external interface signal of the radar guidance component to form a controlled disturbance signal and send it to the guidance component.

6. The ground detection method for a radar guidance component according to claim 2, characterized in that: The high frequency unit is connected to the local oscillator signal of the radar guidance component, simulates and outputs the target echo signal, receives the control command of the PXI system and sends back various status information of the subsystem.

7. The ground detection method for a radar guidance component according to claim 2, characterized in that: The target angular displacement forming device is connected to the serial bus of the PXI system, simulates different positions of the target in space and the motion trajectory of the target in space, and simulates the echo signal reflected by the target through a radiating antenna installed on the target motion mechanism, and the radiating antenna is connected to the high-frequency unit.

8. The ground detection method for radar guidance components according to claim 1 is characterized in that: The steps of detecting the speed channel of the receiving loop of the radar guidance component in the fifth step are as follows: The first step is to make the radar guidance assembly face upward in the missile body coordinate system with the "Y axis" and the "X axis" aligned with the radiation antenna of the target angular displacement forming device; Step 2: The detection device powers on the radar guidance component, binds the target characteristic information of "Task 1", and sets the target characteristic information of "Task 1" to the high frequency combination at the same time, and the signal strength is medium; Step 3: The detection device issues an "allow interception" command to the radar guidance component, so that after intercepting the target, the radar guidance component servo mechanism is locked, and the high-frequency combined attenuation is increased. After the radar guidance component loses the target, the high-frequency combined attenuation is reduced again. After intercepting the target again, the target echo signal strength P0 is recorded at this time, and converted into the receiving loop sensitivity Psensitivity through field calibration; Step 4: The detection device further reduces the high-frequency combined attenuation so that the target echo signal strength is (P sensitivity + N); Step 5: The detection device further adjusts the high-frequency combined Doppler change rate, and sweeps the frequency in positive and negative directions to detect the interception stability; Step 6: The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

9. The ground detection method for a radar guidance component according to claim 1, characterized in that: The steps of detecting the angle channel of the receiving loop of the radar guidance component in the fifth step are as follows: Step 1: The detection device powers on the radar guidance component, binds the "Task 2" target characteristic information, sets the "Task 2" target characteristic information to the high-frequency combination, and sets the target echo signal strength to (P sensitivity + N). After intercepting the target, the offset signal at this time is detected; Step 2: Set the target echo signal strength to P sensitivity and (P sensitivity + M) respectively, and detect the misalignment signal respectively; Step 3: Take the difference of each channel and compare the offset with the initial strong signal line to check whether it meets the technical requirements: Step 4: The detection device powers on the radar guidance component, binds the "Task 3" target characteristic information, and sets the "Task 3" target characteristic information to the high-frequency combination, and then intercepts the target; Step 5: The detection device controls the radiating antenna of the target angular displacement forming device to shift a certain angle θ1 in the positive and negative directions respectively, sets the target echo signal strength to (P sensitivity + N), detects the detuning signal at this time, and calculates the direction finding slope K1; Step 6: The detection device controls the positive and negative direction offsets of the radiating antenna of the target angular displacement forming device by θ2, sets the target echo signal strength to (P sensitivity + N), detects the detuning signal at this time, and calculates the direction finding slope K2; Step 7: The detection device controls the positive and negative direction offsets of the radiating antenna of the target angular displacement forming device by θ1, sets the target echo signal strength to P sensitivity, detects the detuning signal at this time, and calculates the direction finding slope K3; Step 8: The detection device processes and detects the collected digital information and analog information of the radar guidance component to determine whether the receiving loop speed channel meets the technical requirements.

10. The ground detection method for radar guidance components according to claim 1, characterized in that: The steps of detecting the radar guidance component servo system in the fifth step are as follows: Step 1: The detection device powers on the radar guidance component and binds the target characteristic information of "Task 4". After the servo mechanism moves into place, it binds the target characteristic information of "Task 5". The data α is recorded with the start time of antenna deflection; the data β is recorded with the end time △T of antenna stop rotation, and the antenna rotation angular velocity ω is calculated (ω=︱α-β︱ / △T), to determine whether the servo system meets the technical requirements; Step 2: The detection device powers on the radar guidance component and binds the target characteristic information of "Task 5". After the servo mechanism moves into place, the disturbance signal generated inside the signal transfer unit is connected to the Y and Z receiving channels respectively, and the output signal U′ of the measurement amplifier inside the radar guidance component is measured. i After disconnecting the "power" button of the signal transfer unit, measure the output signal U" of the internal measuring amplifier of the radar guidance component again. i , calculate the projectile coupling coefficient (δ i =U′ i / U″ i ) whether the technical requirements are met.

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