Multi-machine fusion simulation training long wave transmitter

Abstract

The invention provides a multi-machine fusion simulation training long-wave transmitter, and relates to the technical field of high-power long-wave transmitters. The simulation training long wave transmitter generates basic radio frequency signals through the signal processing unit, and the basic radio frequency signals are subjected to power amplification through the power amplification synthesis unit, processed through the matched filtering tuning unit and then output to the simulation antenna. The whole process is uniformly deployed by the control unit, and complete simulation of the actual working process of the transmitter is realized. The modularized design enables technicians to intuitively understand the signal processing flow of the transmitter and master the operation essentials of each unit in practice, so that a real and reliable training environment is provided for the technicians, and the equipment operation and fault processing capabilities are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of high-power long-wave transmitters, and in particular to a multi-machine integrated simulation training long-wave transmitter. Background Art

[0002] Long-wave transmitters are key equipment in wireless communication systems, with high power, high voltage and current, etc. They are scattered, large in size, and have complex components. As they undertake important communication tasks, it is not convenient for technicians to conduct practical operation training during non-task periods, which seriously affects their in-depth learning and mastery of the equipment.

[0003] The existing long-wave transmitter training mainly relies on theoretical explanations and paper materials. The technicians learn about the working principle and operation essentials of the equipment through instructors’ explanations and consulting technical manuals, and understand the basic structure of the equipment by observing the actual equipment. Although this training method can impart basic knowledge, it cannot allow the technicians to have an in-depth understanding of the composition structure and working process of each device within the system.

[0004] Due to the lack of practical training, it is difficult for technicians to form an intuitive understanding of the equipment and master the operating essentials and emergency response methods of the equipment. Especially when the equipment fails, due to the lack of practical experience, it is difficult for maintenance personnel to effectively improve their troubleshooting ability and maintenance level, which directly affects the completion of the transmitter's launch mission and the performance of the entire communication system. Therefore, there is an urgent need for a transmitter that provides technicians with a real operation training environment without affecting the actual work of the transmitter. Summary of the invention

[0005] The present application provides a multi-machine integrated simulation training long-wave transmitter, which is used to provide a realistic operation training environment for technicians without affecting the actual operation of the transmitter.

[0006] In the first aspect, the present application provides a multi-machine fusion simulation training long-wave transmitter, including: a signal processing unit, which is used to generate a radio frequency modulation signal according to a transmission instruction, and convert the radio frequency modulation signal into multiple groups of pulse signals to obtain a radio frequency excitation signal; a power amplification and synthesis unit, which is used to amplify the radio frequency excitation signal and then synthesize the power to obtain a new radio frequency excitation signal; a matching filter tuning unit, which is used to impedance match, filter out high-order harmonics and series tune the new radio frequency excitation signal to obtain an output radio frequency excitation signal; a simulation antenna, which is used to radiate the output radio frequency excitation signal; a control unit, which is used to control the signal processing unit, the power amplification and synthesis unit, the matching filter tuning unit and the simulation antenna.

[0007] By adopting the above technical solution, the simulated training long-wave transmitter generates a basic RF signal through the signal processing unit, and the power amplification unit performs power amplification, and then outputs it to the simulated antenna after processing by the matched filter tuning unit. The entire process is uniformly coordinated by the control unit, realizing a complete simulation of the actual transmitter working process. This modular design enables technicians to intuitively understand the signal processing flow of the transmitter and master the operating essentials of each unit in practice, providing technicians with a real and reliable training environment and effectively improving equipment operation and troubleshooting capabilities.

[0008] In combination with some embodiments of the first aspect, in some embodiments, the signal processing unit specifically includes: an exciter and a signal processing device; the exciter is used to receive a transmission instruction, encode and modulate according to the working mode required by the transmission instruction, and obtain a radio frequency modulated signal; the signal processing device is used to convert the radio frequency modulated signal into multiple groups of pulse signals to obtain a radio frequency excitation signal.

[0009] By adopting the above technical solution, the signal processing unit is divided into two functional modules, the exciter and the signal processing device, so that the signal modulation and signal conversion processes are relatively independent. The exciter is responsible for the coding modulation of the signal, and the signal processing device is responsible for the conversion of the signal form. This clear functional division not only makes it easier for technicians to understand the basic principles of signal processing, but also makes fault location more accurate, while improving the maintainability and reliability of the system.

[0010] In combination with some embodiments of the first aspect, in some embodiments, the signal processing device specifically includes an analog signal processing device and a digital signal processing device; the analog signal processing device adopts an analog circuit design, and is used to convert the radio frequency modulated signal into a switching signal arranged in a predetermined timing sequence to obtain a radio frequency excitation signal; the digital signal processing device adopts a software radio method, and is used to digitally process the radio frequency modulated signal and convert it into a switching signal arranged in a predetermined timing sequence to obtain a radio frequency excitation signal; a control unit is used to control the switching switch of the analog signal processing device and the digital signal processing device according to a preset analog transmitter type; enable the selected analog signal processing device or digital signal processing device to be enabled, and put the other analog signal processing device or digital signal processing device in a closed state.

[0011] By adopting the above technical solution, a design combining analog signal processing devices and digital signal processing devices is adopted, and the two processing modes are switched through the control unit, the signal processing characteristics of different types of transmitters can be simulated. This flexible switching mechanism enables the same training system to meet the training needs of multiple transmitter types, greatly improving the applicability and practical value of the training system.

[0012] In combination with some embodiments of the first aspect, in some embodiments, the power amplification synthesis unit specifically includes: a first power amplifier; a second power amplifier; a third power amplifier; the amplification powers of the first power amplifier, the second power amplifier, and the third power amplifier are reduced sequentially; a control unit, used to control the power switches of the first power amplifier, the second power amplifier, and the third power amplifier according to a pre-set power amplification factor; enabling the selected first power amplifier, the second power amplifier, or the third power amplifier to be powered on, and putting other power amplifier groups in a power-off state.

[0013] By adopting the above technical solution, a three-stage power amplifier design is adopted, and the switching of different power levels is realized through the control unit. The design of the power amplifier with amplification power decreasing in sequence enables the system to select the appropriate power level according to actual needs, which not only ensures the training effect but also avoids the waste of resources. At the same time, this hierarchical design also makes it easier for technicians to understand the principles and characteristics of power amplification.

[0014] In combination with some embodiments of the first aspect, in some embodiments, the control unit specifically includes: a main control cabinet, used to collect parameters and equipment status information of the transmitter, and distribute the collected data to sub-control cabinets, and at the same time receive and manage the drive signals output by the sub-control cabinets; a number of sub-control cabinets, used to perform logical operations and processing based on the data forwarded by the main control cabinet, and output corresponding drive signals.

[0015] By adopting the above technical solution, a hierarchical control structure combining the master control cabinet and the sub-control cabinet is adopted to realize the centralized data collection and distributed processing. The master control cabinet is responsible for unified coordination, and the sub-control cabinet is responsible for specific execution. This control architecture not only improves the response speed of the system, but also enhances the reliability of the system, while providing technicians with a clear understanding of the control hierarchy.

[0016] In combination with some embodiments of the first aspect, in some embodiments, during the operation of the control unit, the sub-control cabinet selected by the user is in a power-enabled state, and the remaining sub-control cabinets are in a no-power and non-start working state; the sub-control cabinet in the power-enabled state performs logical operations and processing on the collected data, and sends out a driving signal based on the processing results.

[0017] By adopting the above technical solution, the switching of different control modes is realized by controlling the power supply status of the sub-control cabinet. Only the selected sub-control cabinet is in working state, and other sub-control cabinets are in power-off state. This design not only saves energy, but also avoids interference between different control modes, ensuring the stability and reliability of the training process.

[0018] In combination with some embodiments of the first aspect, in some embodiments, Type I control cabinet adopts a control method that combines a single-chip microcomputer and FPGA, and displays the status through panel buttons and indicator lights; Type II control cabinet adopts PLC as the control method, and uses an operation indicator panel as the human-machine interface; Type III control cabinet adopts PLC as the control method, and uses a control display screen as the human-machine interface.

[0019] By adopting the above technical solutions, three different types of control cabinets are provided, each with a different control method and human-machine interface. This diversified design enables technicians to be familiar with the control characteristics of different types of transmitters, enhances the practicality and adaptability of the training system, and also provides a richer operating experience.

[0020] In combination with some embodiments of the first aspect, in some embodiments, the simulated antenna is composed of a capacitor and a resistor connected in series; the capacitance value of the capacitor can be adjusted by changing the number of capacitor devices connected to the main circuit or by operating the connecting devices between the capacitors; the resistance value of the resistor can be adjusted by turning on and off the corresponding switch.

[0021] By adopting the above technical solution, an adjustable capacitor and resistor combination is used to form a simulated antenna. By changing the capacitor and resistor values, the antenna characteristics under different working conditions can be simulated. This flexible adjustment mechanism enables the training system to simulate a variety of actual working scenarios, improving the authenticity and effectiveness of the training.

[0022] In combination with some embodiments of the first aspect, in some embodiments, the transmitter further includes: a power supply unit for supplying power to the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit, the simulated antenna, and the control unit.

[0023] By adopting the above technical solution, an independent power supply unit is set up to provide power support for each functional module, ensuring the stable operation of the entire system. This centralized power supply design not only simplifies the power management of the system, but also makes it easier for technicians to understand the power supply principle and troubleshooting methods of the equipment.

[0024] In combination with some embodiments of the first aspect, in some embodiments, the transmitter also includes: a cooling unit; the cooling unit specifically includes: a water cooling system, used to provide cooling for the signal processing unit, the power amplification and synthesis unit, the matching filter tuning unit, the simulation antenna, and the control unit; an air cooling system, used to provide cooling for the signal processing unit, the power amplification and synthesis unit, the matching filter tuning unit, the simulation antenna, and the control unit.

[0025] By adopting the above technical solution, the system is equipped with both water cooling and air cooling, which provides reliable temperature control. The combination of the two cooling methods improves the heat dissipation efficiency.

[0026] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. The simulated training long-wave transmitter generates a basic RF signal through the signal processing unit, and the power amplification unit performs power amplification, and then outputs it to the simulated antenna after processing by the matched filter tuning unit. The entire process is uniformly coordinated by the control unit, realizing a complete simulation of the actual transmitter working process. This modular design enables technicians to intuitively understand the signal processing flow of the transmitter and master the operating essentials of each unit in practice, providing technicians with a real and reliable training environment and effectively improving equipment operation and troubleshooting capabilities.

[0027] 2. The signal processing unit is divided into two functional modules: the exciter and the signal processing device, so that the signal modulation and signal conversion processes are relatively independent. The exciter is responsible for the coding and modulation of the signal, and the signal processing device is responsible for the conversion of the signal form. This clear functional division not only makes it easier for technicians to understand the basic principles of signal processing, but also makes fault location more accurate, while improving the maintainability and reliability of the system.

[0028] 3. By controlling the power supply status of the sub-control cabinet, the switching of different control modes is realized. Only the selected sub-control cabinet is in working state, and other sub-control cabinets are in power-off state. This design not only saves energy, but also avoids interference between different control modes, ensuring the stability and reliability of the training process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a block diagram of a multi-machine fusion simulation training long-wave transmitter; Figure 2 is a block diagram of a signal processing unit; Figure 3 is a block diagram of a power amplification synthesis unit; Figure 4 This is a schematic diagram of the external connection of the main control cabinet for collection and output; Figure 5 This is the antenna / load transfer switch control connection diagram; Figure 6 This is a schematic diagram of the sub-control cabinet. DETAILED DESCRIPTION

[0030] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include plural expressions, unless there is a clear indication to the contrary in the context. It should also be understood that the term "and / or" used in the present application refers to and includes any or all possible combinations of one or more listed items.

[0031] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0032] See also Figure 1 , Figure 1 It is a block diagram of a multi-machine fusion simulation training long-wave transmitter; A multi-machine fusion simulation training long-wave transmitter, comprising: A signal processing unit, used to generate a radio frequency modulation signal according to the transmission instruction, and convert the radio frequency modulation signal into a plurality of groups of pulse signals to obtain a radio frequency excitation signal; See also Figure 2 , Figure 2 is a block diagram of a signal processing unit; In some embodiments, the signal processing unit specifically includes: an actuator and a signal processing device; The exciter is used to receive the transmission instruction, encode and modulate according to the working mode required by the transmission instruction, and obtain the radio frequency modulation signal; The signal processing device is used to convert the radio frequency modulated signal into multiple groups of pulse signals to obtain a radio frequency excitation signal.

[0033] The exciter is connected to the external control device via a bus and is used to receive a transmission instruction containing operating parameters, including but not limited to: operating frequency, modulation mode, coding format, power level, etc.

[0034] In some embodiments, after receiving the transmission instruction, the exciter first parses the coding parameters in the transmission instruction. According to different coding requirements, the exciter can selectively perform the following coding processing: when Manchester coding is required, the input digital baseband signal is converted into the corresponding Manchester code; when differential code is required, the input signal is converted into differential code form; when convolution code is required, the input signal is processed using a convolution encoder. The coded signal output by the exciter is used as the input signal of the exciter.

[0035] The exciter performs corresponding modulation processing on the coded signal according to the modulation mode specified in the transmission instruction. For example: when FSK modulation is adopted, the exciter modulates the coded signal into RF signals of different frequencies through a voltage-controlled oscillator; when PSK modulation is adopted, the exciter modulates the coded signal into RF signals of different phases through a phase modulator; when QAM modulation is adopted, the exciter modulates the amplitude and phase of the coded signal simultaneously through an orthogonal modulator, and finally outputs a RF modulated signal.

[0036] The signal processing device first preprocesses the received RF modulated signal, including operations such as signal amplification and filtering. The preprocessed signal is sent to the amplitude detection circuit, and the detection circuit outputs a voltage value corresponding to the signal amplitude. The voltage value is compared with a preset threshold value, and when the voltage value exceeds the threshold value, the pulse generation unit is triggered to work. The signal processing device is implemented by a programmable timer array, including multiple independent timer circuits. Each timer circuit can generate a pulse signal with a specific pulse width and period according to preset timing parameters. The timing parameters of these pulse signals (such as pulse width, rise time, fall time, etc.) can be adjusted by the control unit to adapt to the characteristics of different transmitters. Multiple groups of pulse signals are logically combined to form the final RF excitation signal. For example, multiple groups of pulse signals can be logically ANDed through an "AND" gate to ensure that a valid excitation signal is output only when all timing conditions are met at the same time; multiple groups of pulse signals can also be logically ORed through an "OR" gate so that an excitation signal can be output when any condition is met.

[0037] In some embodiments, the signal processing device is further provided with a monitoring circuit for real-time monitoring of the parameters of the pulse signal. When an abnormality is detected (such as the pulse width exceeds a preset range), the monitoring circuit will generate an alarm signal and display it on the operation interface through the control unit, so that the technicians can find and deal with the problem in time.

[0038] It can be seen that the signal processing unit is divided into two functional modules, the exciter and the signal processing device, so that the signal modulation and signal conversion processes are relatively independent. The exciter is responsible for the coding and modulation of the signal, and the signal processing device is responsible for the conversion of the signal form. This clear functional division not only makes it easier for technicians to understand the basic principles of signal processing, but also makes fault location more accurate, while improving the maintainability and reliability of the system.

[0039] In some embodiments, in order to meet different configurations of existing users, the signal processing device specifically includes an analog signal processing device and a digital signal processing device; The analog signal processing device adopts an analog circuit design and is used to convert the radio frequency modulated signal into a switching signal arranged in a predetermined time sequence to obtain a radio frequency excitation signal; A digital signal processing device, using software radio, is used to convert the radio frequency modulated signal into a switching signal arranged in a predetermined time sequence after digital processing to obtain a radio frequency excitation signal; A control unit is used to control the switching switch of the analog signal processing device and the digital signal processing device according to the preset analog transmitter type; enable the selected analog signal processing device or digital signal processing device, and turn off the other analog signal processing device or digital signal processing device.

[0040] In some embodiments, the analog signal processing device is implemented by analog circuit design. The device is mainly composed of a signal conditioning circuit, a comparator group and a timer array. The signal conditioning circuit includes an amplifier and a filter, which are used to adjust the amplitude and filter the noise of the input RF modulation signal. The comparator group is composed of multiple voltage comparators, which compare the conditioned signal with multiple reference voltages of different levels and output corresponding level trigger signals. The timer array includes multiple timers, which generate rectangular waves with different duty cycles and different phases according to the level trigger signal. These rectangular waves are combined according to a predetermined timing through a logic gate circuit to finally form a RF excitation signal.

[0041] In some embodiments, the digital signal processing device uses software radio technology to realize the signal processing function. The device mainly includes ADC (analog-to-digital converter), FPGA (field programmable gate array) and DAC (digital-to-analog converter). The ADC adopts 14-bit resolution and the sampling rate is not less than 100MHz to ensure high-precision sampling of the input RF modulated signal. Functional modules such as digital filter, signal detector and timing controller are implemented inside the FPGA. The digital filter is used to suppress the noise component in the sampled signal; the signal detector extracts the signal characteristics by digital comparison; and the timing controller generates a digital switch control signal according to the preset timing parameters. Finally, the digital switch control signal is converted into an analog RF excitation signal by DAC.

[0042] The control unit stores the preset transmitter type information through the configuration register. When the user selects a certain type of transmitter for simulation training, the control unit reads the characteristic parameters of the transmitter and determines which signal processing mode to enable based on these parameters.

[0043] In some embodiments, the control unit is implemented with an embedded processor and is equipped with a human-computer interaction interface. The operator can select the transmitter type, set the working parameters, view the operating status, etc. through the touch screen or keystroke. The human-computer interaction interface adopts a graphical design to intuitively display the working status of the signal processing channel, and indicates the operating status of each module through different color labels, so that the operator can quickly grasp the working status of the system.

[0044] It can be seen that the design of combining analog signal processing devices and digital signal processing devices, and switching between the two processing modes through the control unit, can simulate the signal processing characteristics of different types of transmitters. This flexible switching mechanism enables the same training system to meet the training needs of multiple transmitter types, greatly improving the applicability and practical value of the training system.

[0045] A power amplification and synthesis unit, used to amplify and power synthesize the radio frequency excitation signal to obtain a new radio frequency excitation signal; See also Figure 3 , Figure 3 is a block diagram of a power amplification synthesis unit; In some embodiments, the power amplification and synthesis unit specifically includes: a first power amplifier; a second power amplifier; a third power amplifier; the amplification powers of the first power amplifier, the second power amplifier, and the third power amplifier decrease in sequence; A control unit is used to control the power switches of the first power amplifier, the second power amplifier and the third power amplifier according to a preset power gain; enable the selected first power amplifier, the second power amplifier or the third power amplifier to be powered on, and put other power amplifier groups in a power-off state.

[0046] In some embodiments, the power amplification and synthesis unit includes three groups of power amplifiers, namely a first power amplifier, a second power amplifier and a third power amplifier. The output powers of the three groups of power amplifiers decrease in sequence to meet the power requirements of different transmitter types.

[0047] Specifically, the first power amplifier adopts liquid cooling and mainly consists of high-power MOSFET tubes to form an H-bridge amplifier circuit. The output power of the power amplifier can reach 20kW, which is suitable for simulating high-power transmitting equipment. The H-bridge amplifier circuit adopts a full-bridge topology structure, including four power MOSFET tubes, and realizes high-efficiency power conversion through PWM control. The drive circuit adopts an optocoupler isolation method to ensure the electrical isolation of the control signal from the power stage circuit. In order to monitor the working status of the power amplifier, multiple sensors such as current, voltage and temperature are set. The output signals of these sensors are sent to the indication circuit after signal conditioning to display various working parameters in real time.

[0048] The second power amplifier adopts air cooling and has an output power of 5kW. This power amplifier also adopts H-bridge amplifier circuit, but uses medium-power MOSFET tubes. The cooling system consists of a high-speed centrifugal fan and an aluminum radiator. The surface of the radiator is designed with dense cooling fins to improve the heat dissipation efficiency. The drive circuit uses a dedicated MOSFET driver chip with overcurrent protection and dead time control functions. The indicator circuit displays the working status of the power amplifier through an LED digital tube.

[0049] The third power amplifier also uses air cooling, with an output power of 2kW. This power amplifier uses a small power MOSFET tube to form an H-bridge amplifier circuit. Considering the low power, the heat dissipation system uses a simple axial fan plus a heat sink combination. The design of the drive circuit and the indicator circuit is similar to that of the second power amplifier, but the specifications of the circuit components are reduced accordingly.

[0050] The control unit controls the power supply status of each power amplifier through the DC power supply contactor. When a certain type of transmitter needs to be simulated, the control unit first reads the preset power amplification factor parameter. According to the parameter, the control unit controls the power supply switch of the corresponding power amplifier through the relay array. For example, when simulating a high-power transmitter, the control unit closes the power supply contactor of the first power amplifier (20kW) and disconnects the power supply contactors of the second power amplifier (5kW) and the third power amplifier (2kW). This interlocking control method ensures that only one group of power amplifiers is in operation at any time.

[0051] In some embodiments, in order to ensure the reliability of power supply switching, the control unit also implements a timing control function. When switching different power amplifiers, the control unit first disconnects the power supply of the currently working power amplifier, waits for the decoupling capacitor to discharge, and then connects the power supply of the target power amplifier. This soft switching method avoids the impact during the switching process and improves the reliability of the system.

[0052] It can be seen that the three-stage power amplifier design is adopted to achieve the switching of different power levels through the control unit. The design of the power amplifier with decreasing amplification power enables the system to select the appropriate power level according to actual needs, which not only ensures the training effect but also avoids the waste of resources. At the same time, this hierarchical design also makes it easier for technicians to understand the principles and characteristics of power amplification.

[0053] A matched filter tuning unit is used to perform impedance matching, high-order harmonic filtering and series tuning on the new RF excitation signal to obtain an output RF excitation signal; The matched filter tuning unit includes three functional parts: matching circuit, filter loop and tuning loop. These three parts can optimize the processing of new RF excitation signals through reasonable circuit design and parameter configuration.

[0054] A simulation antenna, used for radiating the output radio frequency excitation signal; In some embodiments, the simulated antenna is composed of a capacitor and a resistor in series; The capacitance value of the capacitor can be adjusted by changing the number of capacitor devices connected to the main circuit or by operating the connecting devices between capacitors; The resistance value of the resistor can be adjusted by turning the corresponding switch on and off.

[0055] In some embodiments, the simulated antenna adopts a capacitor-resistor series structure, and simulates the impedance characteristics of a real antenna to achieve simulation of the antenna working state. Specifically, the capacitor part of the simulated antenna adopts a modular design, including multiple standard capacitor units. Each capacitor unit is composed of a high-voltage ceramic capacitor, whose rated voltage is not less than 3kV, and has good withstand voltage characteristics and temperature stability. The capacitance values ​​of the capacitor units are 100pF, 200pF, 500pF, 1000pF, etc., respectively. A wide range of capacitance adjustment can be achieved through the combination of different capacitance values. Copper busbars are used to connect the capacitor units to ensure the low impedance characteristics of the connection points.

[0056] In some embodiments, multiple groups of parallel capacitor branches are provided, each branch is controlled to be connected or disconnected by a high-voltage vacuum relay, and step-by-step regulation can be achieved by controlling the connection combination of different branches.

[0057] The resistor part uses high-power non-inductive resistors, which are mainly composed of multiple resistor units. Each resistor unit uses a metal sheet resistor and sets multiple independent resistor branches. The resistance value can be adjusted by controlling the combination of different branches.

[0058] It can be seen that the simulated antenna is composed of an adjustable capacitor and resistor. By changing the capacitor and resistor values, the antenna characteristics under different working conditions can be simulated. This flexible adjustment mechanism enables the training system to simulate a variety of actual working scenarios, improving the authenticity and effectiveness of the training.

[0059] The control unit is used to control the signal processing unit, the power amplification and synthesis unit, the matching filter tuning unit and the simulation antenna.

[0060] It can be seen that the simulated training long-wave transmitter generates a basic RF signal through the signal processing unit, and the power amplification synthesis unit performs power amplification, and then outputs it to the simulated antenna after processing by the matched filter tuning unit. The entire process is uniformly coordinated by the control unit, realizing a complete simulation of the actual transmitter working process. This modular design enables technicians to intuitively understand the signal processing flow of the transmitter and master the operating essentials of each unit in practice, providing technicians with a real and reliable training environment and effectively improving equipment operation and troubleshooting capabilities.

[0061] See also Figure 4 , Figure 4 This is a schematic diagram of the external connection of the main control cabinet for collection and output; In some embodiments, the control unit specifically includes: The main control cabinet is used to collect the parameters and equipment status information of the transmitter, distribute the collected data to the sub-control cabinets, and receive and manage the drive signals output by the sub-control cabinets; Several sub-control cabinets are used to perform logical operations and processing based on the data forwarded by the main control cabinet, and output corresponding drive signals.

[0062] This embodiment provides a control unit of a multi-machine fusion simulation training transmitter, including a master control cabinet, three sub-control cabinets and a drive execution cabinet. As the core control part of the system, the master control cabinet has dual functions: one is to collect the main parameters and equipment status information of the transmitter, and forward the collected data to three sub-control cabinets of type I, type II and type III; the other is to receive the drive signals output by the three sub-control cabinets, and integrate them to form control instructions for the actual equipment.

[0063] The sub-control cabinet is equipped with a state information acquisition preprocessing device, a main processor and a drive signal output device. Among them, the state information acquisition preprocessing device includes a signal acquisition preprocessing board and a PLC digital input module for preprocessing the signal; the drive signal output device includes a signal drive board and a PLC digital output module for outputting control signals. The drive execution cabinet is equipped with a motor drive device with switches and coils, which is responsible for executing specific control actions.

[0064] It can be seen that the hierarchical control structure combining the master control cabinet and the sub-control cabinet realizes the centralized collection and distributed processing of data. The master control cabinet is responsible for unified coordination, and the sub-control cabinet is responsible for specific execution. This control architecture not only improves the response speed of the system, but also enhances the reliability of the system, while providing technicians with a clear understanding of the control hierarchy.

[0065] In some embodiments, during the operation of the control unit, the sub-control cabinet selected by the user is in a power-on state, and the remaining sub-control cabinets are in a no-power-on, non-starting working state; The sub-control cabinet in the power-on state performs logical operations and processing on the collected data, and sends out driving signals according to the processing results.

[0066] Please participate Figure 5 , Figure 5 This is the antenna / load transfer switch control connection diagram; This embodiment provides a working mode of a control unit. When the user selects a certain transmitter for operation training, the corresponding sub-control cabinet is powered by UPS and starts working, and other sub-control cabinets remain powered off. Take the antenna / load conversion control as an example: when transmitter No. 1 is selected to work, the UPS power supply of the Type I control cabinet is turned on and the other sub-control cabinets are powered off. Operate the antenna / load button on the panel of the Type I control cabinet, select the transmitter to connect to the antenna to work, and the driver board outputs a 24V forward drive signal to the main control cabinet. The main control cabinet controls the forward rotation of the conversion switch motor through relays and contactors. When the 24V signal that the antenna is in place is received, it is transmitted to the main processing board through the Type I control cabinet, and the drive signal output is stopped to complete the state conversion.

[0067] The sub-control cabinet in working state continuously performs data acquisition, logic operation and signal processing through the main processor, and issues corresponding control instructions according to the current status of the equipment. The drive execution cabinet performs specific control actions according to these instructions to achieve precise control of the transmitter.

[0068] It can be seen that the switching of different control modes is achieved by controlling the power supply status of the sub-control cabinet. Only the selected sub-control cabinet is in working state, and other sub-control cabinets are in power-off state. This design not only saves energy, but also avoids interference between different control modes, ensuring the stability and reliability of the training process.

[0069] See also Figure 6 , Figure 6 This is a schematic diagram of the sub-control cabinet.

[0070] In some embodiments, the Type I control cabinet uses a control method that combines a single-chip microcomputer and an FPGA, and displays the status through panel button control and indicator lights; Type II control cabinet uses PLC as the control method and operation indicator panel as the human-machine interface; Type III control cabinet uses PLC as the control method and a control display screen as the human-machine interface.

[0071] Type I control cabinet adopts a control solution combining single-chip microcomputer and FPGA. The single-chip microcomputer is responsible for basic functions such as serial communication, CAN communication, data storage and digital display. FPGA is the main processing chip to realize the core functions of transmitter control and protection logic, panel control, status display, frequency acquisition, drive signal formation and communication. Human-computer interaction adopts panel button control mode, and all control operations and status displays are realized through panel buttons and indicator lights.

[0072] Both type II and type III control cabinets use PLC as the control core, but different series are selected. The control system includes CPU, SITOP power supply, communication module, signal module (analog and digital input and output), function module and other components. Type II control cabinet is equipped with an operation indicator panel as the human-machine interface, while type III control cabinet uses a control display screen, providing a graphical interface, realizing intuitive status display and convenient operation control.

[0073] It can be seen that three different types of control cabinets are provided, each with a different control method and human-machine interface. This diversified design enables technicians to be familiar with the control characteristics of different types of transmitters, enhances the practicality and adaptability of the training system, and also provides a richer operating experience.

[0074] A power supply unit is used to supply power to the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit, the simulated antenna, and the control unit.

[0075] In some embodiments, the power supply unit includes a DC power supply and an AC power distribution cabinet. The DC power supply adopts a high-frequency switching power supply mode, with an input voltage of three-phase AC 380V±10%, a frequency of 50Hz±5%Hz, and an output of DC 0~200V adjustable voltage, which is mainly used to provide DC working power for the power amplifier. The AC power distribution cabinet is responsible for providing all low-voltage AC power supplies except the high-voltage DC power supply to the various devices of the transmitter, and reasonably distributes the input three-phase 380V / 50Hz AC power supply through the low-voltage distribution device.

[0076] It can be seen that setting up an independent power supply unit to provide power support for each functional module ensures the stable operation of the entire system. This centralized power supply design not only simplifies the power management of the system, but also makes it easier for technicians to understand the power supply principle and troubleshooting methods of the equipment.

[0077] Cooling unit; The cooling unit specifically comprises: A water cooling system, used to provide cooling for the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit, the simulated antenna, and the control unit; The air cooling system is used to provide cooling for the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit, the simulated antenna, and the control unit.

[0078] In some embodiments, this embodiment provides a cooling unit of a multi-machine fusion simulation training transmitter, which adopts a cooling solution combining water cooling and air cooling. The cooling unit includes two main parts: a water cooling system and an air cooling system: The water cooling system is mainly composed of a water cooler, water cooling pipes and sensor devices, and is specifically used for: providing cooling for the DC high-frequency switching power supply; providing liquid cooling for the type III power amplifier (liquid-cooled power amplifier); and monitoring the working status of the cooling system in real time through sensor devices.

[0079] The air cooling system is composed of a fan, which is mainly responsible for: providing forced air cooling for the type I power amplifier; providing forced air cooling for the type II power amplifier; and providing cooling air for the simulated antenna resistor.

[0080] It can be seen that the two cooling methods of water cooling and air cooling provide reliable temperature control for the system. The combination of the two cooling methods improves the heat dissipation efficiency.

[0081] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0082] As used in the above embodiments, the term "when..." may be interpreted to mean "if..." or "after..." or "in response to determining..." or "in response to detecting...", depending on the context. Similarly, the phrases "upon determining..." or "if (the stated condition or event) is detected" may be interpreted to mean "if determining..." or "in response to determining..." or "upon detecting (the stated condition or event)" or "in response to detecting (the stated condition or event)", depending on the context.

Claims

1. A multi-machine fusion simulation training long-wave transmitter, characterized in that: include: A signal processing unit, used to generate a radio frequency modulation signal according to the transmission instruction, and convert the radio frequency modulation signal into a plurality of groups of pulse signals to obtain a radio frequency excitation signal; A power amplification and synthesis unit, used to amplify and power synthesize the radio frequency excitation signal to obtain a new radio frequency excitation signal; A matched filter tuning unit, used for performing impedance matching, high-order harmonic filtering and series tuning on the new radio frequency excitation signal to obtain an output radio frequency excitation signal; A simulation antenna, used for radiating the output radio frequency excitation signal; A control unit is used to control the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit and the simulated antenna.

2. The multi-machine fusion simulation training long-wave transmitter according to claim 1 is characterized in that: The signal processing unit specifically includes: an exciter and a signal processing device; The exciter is used to receive the transmission instruction, encode and modulate according to the working mode required by the transmission instruction, and obtain the radio frequency modulated signal; The signal processing device is used to convert the radio frequency modulated signal into multiple groups of pulse signals to obtain a radio frequency excitation signal.

3. The multi-machine fusion simulation training long-wave transmitter according to claim 2 is characterized in that: The signal processing device specifically includes an analog signal processing device and a digital signal processing device; The analog signal processing device adopts an analog circuit design and is used to convert the radio frequency modulation signal into a switching signal arranged in a predetermined time sequence to obtain the radio frequency excitation signal; The digital signal processing device adopts a software radio method to convert the radio frequency modulation signal into a switch signal arranged in a predetermined time sequence after digital processing to obtain the radio frequency excitation signal; The control unit is used to control the switching switch of the analog signal processing device and the digital signal processing device according to the preset analog transmitter type; enable the selected analog signal processing device or the digital signal processing device, and put the other analog signal processing device or the digital signal processing device into a closed state.

4. The multi-machine fusion simulation training long-wave transmitter according to claim 1 is characterized in that: The power amplification and synthesis unit specifically includes: a first power amplifier; a second power amplifier; a third power amplifier; the amplification powers of the first power amplifier, the second power amplifier, and the third power amplifier decrease in sequence; The control unit is used to control the power switches of the first power amplifier, the second power amplifier and the third power amplifier according to a preset power gain; enable the selected first power amplifier, the second power amplifier or the third power amplifier to be powered on, and put other power amplifier groups in a power-off state.

5. The multi-machine fusion simulation training long-wave transmitter according to claim 1 is characterized in that: The control unit specifically comprises: The main control cabinet is used to collect the parameters and equipment status information of the transmitter, distribute the collected data to the sub-control cabinets, and receive and manage the drive signals output by the sub-control cabinets; Several sub-control cabinets are used to perform logical operations and processing according to the data forwarded by the main control cabinet, and output the corresponding driving signals.

6. The multi-machine fusion simulation training long-wave transmitter according to claim 5 is characterized in that: During the operation of the control unit, the sub-control cabinet selected by the user is in a power-on state, and the other sub-control cabinets are in a no-power-on, non-starting working state; The sub-control cabinet in the power-on state performs logical operations and processing on the collected data, and sends out the driving signal according to the processing results.

7. The multi-machine fusion simulation training long-wave transmitter according to claim 5 is characterized in that: Type I control cabinet adopts a control method combining single chip microcomputer and FPGA, and displays the status through panel buttons and indicator lights; Type II control cabinet uses PLC as the control method and operation indicator panel as the human-machine interface; Type III control cabinet uses PLC as the control method and a control display screen as the human-machine interface.

8. The multi-machine fusion simulation training long-wave transmitter according to claim 1 is characterized in that: The simulated antenna is composed of a capacitor and a resistor in series; The capacitance value of the capacitor can be adjusted by changing the number of capacitor devices connected to the main circuit or by operating the connecting devices between capacitors; The resistance value of the resistor can be adjusted by turning on and off the corresponding switch.

9. The multi-machine fusion simulation training long-wave transmitter according to claim 1 is characterized in that: The transmitter also includes: A power supply unit is used to supply power to the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit, the simulated antenna, and the control unit.

10. The multi-machine fusion simulation training long-wave transmitter according to claim 1 is characterized in that: The transmitter further comprises: a cooling unit; The cooling unit specifically comprises: A water cooling system, used to provide cooling for the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit, the simulated antenna, and the control unit; The air cooling system is used to provide cooling for the signal processing unit, the power amplification and synthesis unit, the matched filter tuning unit, the simulated antenna, and the control unit.

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