Universal radio fuze intermediate frequency echo analog system

Abstract

The application provides a universal radio fuze intermediate frequency echo analog system, a database unit selects data of a corresponding target type according to a data type instruction transmitted by a control unit, and transmits the data to a communication unit, so that an analog intermediate frequency signal finally output by a hardware subsystem has target characteristic information and is almost consistent with an actual intermediate frequency signal, and radio fuze is tested more accurately; it can be seen that the analog system of the application can simulate echo characteristics of different targets in generating echo signals, so that the test result of the radio fuze is consistent with the actual situation, and the test accuracy is improved; furthermore, the application avoids testing the fuze by using live ammunition, reduces the test cost, and improves the safety in the test process; finally, the analog system of the application can be applied to the test of all types of radio fuzes, has a wider test range and higher practicability.

Description

Technical Field

[0001] The invention belongs to the technical field of radio fuzes, and in particular relates to a universal radio fuze intermediate frequency echo simulation system. Background Art

[0002] The core functional modules of a radio fuze can be divided into two parts: the RF front-end module and the control module. The RF front-end's main function is to receive the modulated signal, generate the corresponding RF signal, and transmit the signal using the transmitting antenna. The echo signal after the electromagnetic wave is reflected by the target is received by the receiving antenna, and the received signal is mixed with the transmitted signal to produce the intermediate frequency echo signal. The main function of the control module is to transmit the modulated signal to the RF front-end, control the characteristics of the signal transmitted by the RF front-end, receive the intermediate frequency echo signal transmitted by the RF front-end, process and analyze the intermediate frequency echo signal, and ultimately obtain information about the detected target. Among them, the principles and functions of the RF module are fixed. The detection performance of the radio fuze mainly depends on the control module's control and processing strategy for the intermediate frequency detection signal. Therefore, simulation testing of only the intermediate frequency signal can basically determine whether the fuze's working performance meets the requirements.

[0003] To improve the accuracy and anti-interference capabilities of radio fuzes, numerous types have been developed. After a radio fuze is designed, its functionality is typically verified by mounting it on live ammunition and firing it at targets. However, the high cost of live ammunition can easily cost millions of yuan to complete a fuze test. Furthermore, the immaturity of newly developed fuze technology creates significant safety risks during testing. Currently, some test systems for radio fuzes only provide simple simulations based on theoretical principles. The simulated signals lack information about the target type and differ significantly from actual signals, making them incapable of accurately testing the fuze. Furthermore, current test equipment is typically limited to one or a few types of radio fuzes, whereas radio fuzes come in many different types. This makes these test systems limited in scope and practicality. Summary of the Invention

[0004] To solve the above problems, the present invention provides a universal radio fuze intermediate frequency echo simulation system, which uses a combination of software and hardware to simulate the radio fuze echo intermediate frequency signal, and can perform more accurate testing of the radio fuze.

[0005] A universal radio fuze intermediate frequency echo simulation system includes a hardware subsystem and a software subsystem; wherein the software subsystem stores characteristic information of intermediate frequency echo signals actually acquired by the radio fuze based on different sampling frequencies, detection bandwidths, detection ranges, and relative speeds from various types of targets, wherein the characteristic information of any intermediate frequency echo signal includes the sampling frequency, detection bandwidth, detection range, relative speed, and time domain waveform corresponding to the intrinsic mode function;

[0006] The hardware subsystem identifies the working regime to be simulated based on the modulation signal emitted by the radio fuse, and sends the working regime to be simulated to the software subsystem, wherein different working regimes correspond to different detection bandwidths;

[0007] The software subsystem is used to filter out candidate feature information based on the detection distance and relative speed of the intermediate frequency echo signal to be simulated and the received working system to be simulated, and send it to the hardware subsystem;

[0008] The hardware subsystem determines whether there is a group of feature information among all the received alternative feature information, and whether the corresponding differences between the detection bandwidth, the specified detection distance and the relative speed of the working system to be simulated are all less than the set threshold. If so, the intermediate frequency echo signal corresponding to the group of feature information is used as the intermediate frequency echo signal matching the working system to be simulated. If not, the preliminary feature information groups with the smallest differences between the detection bandwidth of the working system to be simulated are selected from all the received alternative feature information, and then the secondary feature information groups with the smallest differences between the specified relative speed are selected from each group of preliminary feature information. Finally, the final feature information groups with the smallest difference between the specified detection distance are selected from each group of secondary feature information, and the intermediate frequency echo signal corresponding to the final feature information is interpolated or sampled, and then the intermediate frequency echo signal obtained by interpolation or sampling is used as the intermediate frequency echo signal matching the working system to be simulated.

[0009] Furthermore, the software subsystem includes a communication unit, a control unit, a human-computer interaction unit, and a database unit;

[0010] The database unit is used to extract and store characteristic information of each intermediate frequency echo signal actually collected by the radio fuze based on different sampling frequencies, detection bandwidths, detection distances and relative speeds for each type of target;

[0011] The communication unit is used to receive the working system to be simulated sent by the hardware subsystem;

[0012] The human-machine interaction unit is used to interact with the operator, and the operator inputs a detection distance instruction, a relative speed instruction, a target type instruction, a start instruction, a stop instruction, and a return to working state instruction through the human-machine interaction unit, wherein the detection distance instruction, the relative speed instruction, the target type instruction, the start instruction, and the stop instruction are transmitted to the control unit, and the return to working state instruction is transmitted to the communication unit; at the same time, the human-machine interaction unit is also used to display the working system to be simulated transmitted by the communication unit;

[0013] The control unit determines the corresponding theoretical intermediate frequency echo signal based on the received detection distance instruction, relative speed instruction, target type instruction and the working system to be simulated transmitted by the communication unit, and generates a data type instruction based on the theoretical intermediate frequency echo signal and transmits it to the database unit; at the same time, the control unit also generates initial control information based on the start instruction and the stop instruction and transmits it to the communication unit;

[0014] The database unit is further configured to select candidate feature information corresponding to a target type according to a data type instruction transmitted by the control unit, and transmit the candidate feature information to the communication unit; wherein the candidate feature information is feature information of intermediate frequency echo signals at different sampling frequencies, detection bandwidths, detection distances, and relative speeds corresponding to the target type selected by the current data type instruction;

[0015] The communication unit is used to integrate the initial control information and the return-to-working-state instruction into final fused control information, and then send the fused control information and the candidate feature information to the hardware subsystem.

[0016] Furthermore, the method for the database unit to extract characteristic information of the intermediate frequency echo signal of any type of target is:

[0017] Divide all the intermediate frequency echo signals collected by the current type of target into N groups;

[0018] Perform variational mode decomposition on N groups of intermediate frequency echo signals to obtain N intrinsic mode functions with different center frequencies;

[0019] Perform correlation processing on N intrinsic mode functions and select the intermediate frequency echo signal corresponding to the intrinsic mode function with the highest correlation as the characteristic signal of the current type of target;

[0020] The sampling frequency, detection bandwidth, detection distance, and relative speed of the characteristic signal of the current type of target are extracted to obtain the characteristic information of the current type of target.

[0021] Furthermore, the hardware subsystem includes an information processing module, a control module, a data acquisition module, a communication module, and a waveform generation module;

[0022] The data acquisition module is used to sample the modulation signal emitted by the radio fuse and send the modulation information obtained by the sampling to the information processing module, wherein the modulation information includes waveform, amplitude and frequency;

[0023] The communication module is used to send the fusion control information and the candidate feature information received from the software subsystem to the information processing module, and also send the fusion control information to the control module;

[0024] The information processing module is used to identify the working system to be simulated based on the modulation information, and determine the time to send the working system to be simulated to the communication module based on the start and stop instructions contained in the fusion control information; at the same time, the information processing module also obtains an intermediate frequency echo signal that matches the working system to be simulated based on the received candidate feature information, and sends the final matching intermediate frequency echo signal to the waveform generation module;

[0025] The communication module is also used to send the working system to be simulated to the communication unit of the software subsystem under the control of the information processing module;

[0026] The control module is used to generate a waveform control instruction according to the start instruction and the stop instruction contained in the fusion control information, and send the waveform control instruction to the waveform generation module;

[0027] The waveform generating module is used to output a corresponding intermediate frequency echo signal waveform according to the received intermediate frequency echo signal under the control of the waveform control instruction.

[0028] Furthermore, each type of target is bare land, sandy land, or grassland.

[0029] Beneficial effects:

[0030] 1. The present invention provides a universal radio fuze intermediate frequency echo simulation system. The database unit selects data corresponding to the target type according to the data type instruction transmitted by the control unit, and transmits the data to the communication unit, so that the simulated intermediate frequency signal finally output by the hardware subsystem has the characteristic information of the target and is almost consistent with the actual intermediate frequency signal, thereby making a more accurate test of the radio fuze; it can be seen that the simulation system of the present invention can simulate the echo characteristics of different targets in the generated echo signal, so that the test results of the radio fuze are consistent with the actual ones, thereby improving the accuracy of the test; furthermore, the present invention avoids the use of live ammunition to test the fuze, reduces the cost of the test, and improves the safety during the test; finally, the simulation system of the present invention can be applied to the testing of all types of radio fuzes, has a wider test range and higher practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1A principle block diagram of a general radio fuze intermediate frequency echo analog system is provided. DETAILED DESCRIPTION

[0032] In order to enable personnel in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0033] At present, the test of the radio fuze can only be carried out by being mounted on a live ammunition for shooting test, which results in high cost and certain danger. Even though there are some test systems for the fuze, the simulation environment is too ideal, and the actual environment cannot be truly simulated, and only some types of fuzes can be tested, and the application range is very narrow.

[0034] Therefore, in order to accurately and conveniently design, debug, experiment and the like of the radio fuze, the present application designs a general radio fuze intermediate frequency echo analog system, which can simulate the intermediate frequency echo signals of the radio fuze in different environments, and test the functions of the radio fuze.

[0035] Specifically, a general radio fuze intermediate frequency echo analog system comprises a hardware subsystem and a software subsystem; wherein the software subsystem stores characteristic information of each intermediate frequency echo signal of the radio fuze based on different sampling frequencies, detection bandwidths, detection distances and relative speeds for respectively collecting each type of target, such as bare land, sandy land or grassland and the like, wherein the characteristic information of any intermediate frequency echo signal comprises a sampling frequency, a detection bandwidth, a detection distance, a relative speed and a time domain waveform corresponding to an intrinsic mode function; it should be noted that the characteristics of the intermediate frequency echo signals corresponding to different types of targets are different, and the database can be continuously expanded according to the actually collected data information in the future.

[0036] The hardware subsystem identifies the to-be-analog working system according to the modulation signal emitted by the radio fuze, and sends the to-be-analog working system to the software subsystem, wherein different working systems correspond to different detection bandwidths;

[0037] The software subsystem is used for screening out the candidate characteristic information according to the detection distance, the relative speed of the to-be-analog intermediate frequency echo signal and the received to-be-analog working system, and sending the candidate characteristic information to the hardware subsystem;

[0038] The hardware subsystem determines whether there is a group of feature information among all the received alternative feature information, and whether the corresponding differences between the detection bandwidth, the specified detection distance and the relative speed of the working system to be simulated are all less than the set threshold. If so, the intermediate frequency echo signal corresponding to the group of feature information is used as the intermediate frequency echo signal matching the working system to be simulated. If not, the preliminary feature information groups with the smallest differences between the detection bandwidth of the working system to be simulated are selected from all the received alternative feature information, and then the secondary feature information groups with the smallest differences between the specified relative speed are selected from each group of preliminary feature information. Finally, the final feature information groups with the smallest difference between the specified detection distance are selected from each group of secondary feature information, and the intermediate frequency echo signal corresponding to the final feature information is interpolated or sampled, and then the intermediate frequency echo signal obtained by interpolation or sampling is used as the intermediate frequency echo signal matching the working system to be simulated.

[0039] Further, if Figure 1 As shown, the software subsystem includes a communication unit, a control unit, a human-computer interaction unit, and a database unit;

[0040] The database unit is used to extract and store characteristic information of each intermediate frequency echo signal actually collected by the radio fuze based on different sampling frequencies, detection bandwidths, detection distances and relative speeds for each type of target; wherein the method for the database unit to extract characteristic information of the intermediate frequency echo signal of any type of target is as follows: all intermediate frequency echo signals actually collected for the current type of target are divided into N groups; variational mode decomposition (VMD) is performed on the N groups of intermediate frequency echo signals to obtain N intrinsic mode functions with different center frequencies; correlation processing is performed on the N intrinsic mode functions, and the intermediate frequency echo signal corresponding to the intrinsic mode function with the highest correlation is selected as the characteristic signal of the current type of target; the sampling frequency, detection bandwidth, detection distance and relative speed of the characteristic signal of the current type of target are extracted to obtain characteristic information of the current type of target;

[0041] It should be noted that VMD can decompose the signal into a series of intrinsic mode functions (IMFs) with a certain frequency center, where each IMF contains part of the signal's characteristics. The IMFs obtained from the decomposition of N groups of signals are then correlated. Since the signals are generated by the same target, the IMFs with target characteristics will have a high correlation, while the IMFs with noise characteristics will have a low correlation. The IMF with the highest correlation is selected as the characteristic signal of the target, thereby restoring the target's characteristics to the greatest extent possible and eliminating the influence of noise and other interference.

[0042] The communication unit is used to receive the working system to be simulated sent by the hardware subsystem;

[0043] The human-machine interaction unit is used to interact with the operator, and the operator inputs a detection distance instruction, a relative speed instruction, a target type instruction, a start instruction, a stop instruction, and a return to working state instruction through the human-machine interaction unit, wherein the detection distance instruction, the relative speed instruction, the target type instruction, the start instruction, and the stop instruction are transmitted to the control unit, and the return to working state instruction is transmitted to the communication unit; at the same time, the human-machine interaction unit is also used to display the working system to be simulated transmitted by the communication unit;

[0044] The control unit determines the corresponding theoretical intermediate frequency echo signal based on the received detection distance instruction, relative speed instruction, target type instruction and the working system to be simulated transmitted by the communication unit, and generates a data type instruction based on the theoretical intermediate frequency echo signal and transmits it to the database unit; at the same time, the control unit also generates initial control information based on the start instruction and the stop instruction and transmits it to the communication unit;

[0045] The database unit is further configured to select candidate feature information corresponding to a target type according to a data type instruction transmitted by the control unit, and transmit the candidate feature information to the communication unit; wherein the candidate feature information is feature information of intermediate frequency echo signals at different sampling frequencies, detection bandwidths, detection distances, and relative speeds corresponding to the target type selected by the current data type instruction;

[0046] The communication unit is used to integrate the initial control information and the return-to-working-state instruction into final fused control information, and then send the fused control information and the candidate feature information to the hardware subsystem.

[0047] Further, if Figure 1 As shown, the hardware subsystem includes an information processing module, a control module, a data acquisition module, a communication module, and a waveform generation module;

[0048] The data acquisition module is used to sample the modulation signal emitted by the radio fuse and send the modulation information obtained by the sampling to the information processing module, wherein the modulation information includes waveform, amplitude and frequency;

[0049] The communication module is used to send the fusion control information and the candidate feature information received from the software subsystem to the information processing module, and also send the fusion control information to the control module;

[0050] The information processing module is used to identify the working system to be simulated based on the modulation information, and determine the time to send the working system to be simulated to the communication module based on the start and stop instructions contained in the fusion control information; at the same time, the information processing module also obtains an intermediate frequency echo signal that matches the working system to be simulated based on the received candidate feature information, and sends the final matching intermediate frequency echo signal to the waveform generation module;

[0051] The communication module is also used to send the working system to be simulated to the communication unit of the software subsystem under the control of the information processing module;

[0052] The control module is used to generate a waveform control instruction according to the start instruction and the stop instruction contained in the fusion control information, and send the waveform control instruction to the waveform generation module;

[0053] The waveform generating module is used to output a corresponding intermediate frequency echo signal waveform according to the received intermediate frequency echo signal under the control of the waveform control instruction.

[0054] It should be noted that although traditional radio fuze simulation also uses a combination of software and hardware to simulate the working process of the fuze, it only simulates according to basic principles. For example, it simply uses a delay method to simulate the echo of the radio fuze detection signal. In practice, due to different target types, the target cannot be completely regarded as a point target. Therefore, the signal should not be simply delayed. Instead, the target characteristics should be added to the echo according to the different target types. Only in this way can the fuze detection signal be simulated more accurately. Moreover, the working system used by the radio frequency circuit part of the radio fuze is the same, but there are differences in the detection frequency band. Therefore, only the intermediate frequency signal after mixing is simulated. This not only can simulate radio fuzes of all frequency bands at the same time, but also reduce costs. However, the present invention can simulate the echo characteristics of different targets in the echo. At the same time, the present invention simulates the intermediate frequency echo, making it applicable to all radio fuzes.

[0055] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may of course make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A universal radio fuze intermediate frequency echo simulation system, characterized in that: The system comprises a hardware subsystem and a software subsystem; wherein the software subsystem stores characteristic information of each intermediate frequency echo signal actually acquired by the radio fuze based on different sampling frequencies, detection bandwidths, detection distances, and relative speeds for each type of target, wherein the characteristic information of any intermediate frequency echo signal includes the sampling frequency, detection bandwidth, detection distance, relative speed, and time domain waveform corresponding to the intrinsic mode function; The hardware subsystem identifies the working regime to be simulated based on the modulation signal emitted by the radio fuse, and sends the working regime to be simulated to the software subsystem, wherein different working regimes correspond to different detection bandwidths; The software subsystem is used to filter out candidate feature information based on the detection distance and relative speed of the intermediate frequency echo signal to be simulated and the received working system to be simulated, and send it to the hardware subsystem; The hardware subsystem determines whether there is a group of feature information among all the received alternative feature information, and whether the corresponding differences between the detection bandwidth, the specified detection distance and the relative speed of the working system to be simulated are all less than the set threshold. If so, the intermediate frequency echo signal corresponding to the group of feature information is used as the intermediate frequency echo signal matching the working system to be simulated. If not, the preliminary feature information groups with the smallest differences between the detection bandwidth of the working system to be simulated are selected from all the received alternative feature information, and then the secondary feature information groups with the smallest differences between the specified relative speed are selected from each group of preliminary feature information. Finally, the final feature information groups with the smallest difference between the specified detection distance are selected from each group of secondary feature information, and the intermediate frequency echo signal corresponding to the final feature information is interpolated or sampled, and then the intermediate frequency echo signal obtained by interpolation or sampling is used as the intermediate frequency echo signal matching the working system to be simulated.

2. A universal radio fuze intermediate frequency echo simulation system as claimed in claim 1, characterized in that: The software subsystem includes a communication unit, a control unit, a human-computer interaction unit, and a database unit; The database unit is used to extract and store characteristic information of each intermediate frequency echo signal actually collected by the radio fuze based on different sampling frequencies, detection bandwidths, detection distances and relative speeds for each type of target; The communication unit is used to receive the working system to be simulated sent by the hardware subsystem; The human-machine interaction unit is used to interact with the operator, and the operator inputs a detection distance instruction, a relative speed instruction, a target type instruction, a start instruction, a stop instruction, and a return to working state instruction through the human-machine interaction unit, wherein the detection distance instruction, the relative speed instruction, the target type instruction, the start instruction, and the stop instruction are transmitted to the control unit, and the return to working state instruction is transmitted to the communication unit; at the same time, the human-machine interaction unit is also used to display the working system to be simulated transmitted by the communication unit; The control unit determines the corresponding theoretical intermediate frequency echo signal based on the received detection distance instruction, relative speed instruction, target type instruction and the working system to be simulated transmitted by the communication unit, and generates a data type instruction based on the theoretical intermediate frequency echo signal and transmits it to the database unit; at the same time, the control unit also generates initial control information based on the start instruction and the stop instruction and transmits it to the communication unit; The database unit is further configured to select candidate feature information corresponding to a target type according to a data type instruction transmitted by the control unit, and transmit the candidate feature information to the communication unit; wherein the candidate feature information is feature information of intermediate frequency echo signals at different sampling frequencies, detection bandwidths, detection distances, and relative speeds corresponding to the target type selected by the current data type instruction; The communication unit is used to integrate the initial control information and the return-to-working-state instruction into final fused control information, and then send the fused control information and the candidate feature information to the hardware subsystem.

3. A universal radio fuze intermediate frequency echo simulation system as claimed in claim 2, characterized in that: The method for the database unit to extract characteristic information of the intermediate frequency echo signal of any type of target is: Divide all the intermediate frequency echo signals collected by the current type of target into N groups; Perform variational mode decomposition on N groups of intermediate frequency echo signals to obtain N intrinsic mode functions with different center frequencies; Perform correlation processing on N intrinsic mode functions and select the intermediate frequency echo signal corresponding to the intrinsic mode function with the highest correlation as the characteristic signal of the current type of target; The sampling frequency, detection bandwidth, detection distance, and relative speed of the characteristic signal of the current type of target are extracted to obtain the characteristic information of the current type of target.

4. A universal radio fuze intermediate frequency echo simulation system as claimed in claim 2, characterized in that: The hardware subsystem includes an information processing module, a control module, a data acquisition module, a communication module, and a waveform generation module; The data acquisition module is used to sample the modulation signal emitted by the radio fuse and send the modulation information obtained by the sampling to the information processing module, wherein the modulation information includes waveform, amplitude and frequency; The communication module is used to send the fusion control information and the candidate feature information received from the software subsystem to the information processing module, and also send the fusion control information to the control module; The information processing module is used to identify the working system to be simulated based on the modulation information, and determine the time to send the working system to be simulated to the communication module based on the start and stop instructions contained in the fusion control information; at the same time, the information processing module also obtains an intermediate frequency echo signal that matches the working system to be simulated based on the received candidate feature information, and sends the final matching intermediate frequency echo signal to the waveform generation module; The communication module is also used to send the working system to be simulated to the communication unit of the software subsystem under the control of the information processing module; The control module is used to generate a waveform control instruction according to the start instruction and the stop instruction contained in the fusion control information, and send the waveform control instruction to the waveform generation module; The waveform generating module is used to output a corresponding intermediate frequency echo signal waveform according to the received intermediate frequency echo signal under the control of the waveform control instruction.

5. A universal radio fuze intermediate frequency echo simulation system according to any one of claims 1 to 4, characterized in that: Target types are bare land, sand or grassland.

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