Medium-wave wireless transmission device and medium-wave wireless transmission control method

Abstract

The invention provides medium-wave wireless transmission equipment and a medium-wave wireless transmission control method. The medium-wave wireless transmission equipment comprises a signal transmission port, a main control board, a control instruction processing module and a service radio frequency signal processing module, the signal transmission port comprises a first transmission port and a second transmission port which are respectively used for receiving a control instruction signal and a service radio frequency signal; the main control board is connected with the signal transmission port and is used for outputting the control instruction signal to the control instruction processing module and outputting the service radio frequency signal to the service radio frequency signal processing module; the service radio frequency signal processing module comprises a pre-amplification module connected with the main control board, a power distribution module connected with the pre-amplification module and a control board; the control instruction processing module comprises a control board connected with the output end of the main control board, and the control board in the control instruction processing module is used for configuring parameters of the transmitting system based on the control instruction signals. According to the invention, the control instruction can be remotely sent, and the parameters of the transmitting system can be automatically configured.

Description

Technical Field

[0001] The present invention relates to the technical field of medium wave antenna transmission, and in particular to medium wave wireless transmission equipment and a medium wave wireless transmission control method. Background Art

[0002] As an important part of the radio station transmission system, the medium wave transmission system is used to transmit medium wave frequency signals to send sound, music, news and other types of information to a wide geographical area. This system is crucial for radio stations to ensure the effective transmission and wide coverage of information. Medium wave frequencies are usually in the range of 530kHz to 1700kHz. Due to its unique propagation characteristics, it has good reception performance. It can not only penetrate certain obstacles, but also cover a relatively large geographical area, providing reliable guarantee for long-distance communication.

[0003] However, the existing medium wave transmission system still has deficiencies in intelligent control. Specifically, the existing medium wave transmission system cannot realize automatic parameter configuration, which limits its operating efficiency and flexibility to a certain extent. Summary of the invention

[0004] The present invention provides a medium wave wireless transmission device and a medium wave wireless transmission control method, which are used to solve the defects of the medium wave transmitting system in the prior art that the control intelligence level is not high and the automatic parameter configuration cannot be realized, and realize the automatic parameter configuration of the medium wave transmitting system.

[0005] The present invention provides a medium wave wireless transmission device, including a signal transmission port, a main control board, a control instruction processing module and a service radio frequency signal processing module; The signal transmission port includes a first transmission port and a second transmission port, the first transmission port is used to receive a control command signal, the second transmission port is used to receive a service radio frequency signal, and the first transmission port is a network port using serial port communication; The main control board is connected to the signal transmission port, and is used to output the control instruction signal to the control instruction processing module, and output the service radio frequency signal to the service radio frequency signal processing module; The service RF signal processing module includes a pre-amplification module connected to the output end of the main control board, a power distribution module connected to the output end of the pre-amplification module, and a control board connected to the output end of the power distribution module. The control board in the service RF signal processing module is used to send the service RF signal output by the power distribution module to the transmitting device for transmission; The control instruction processing module includes the control board connected to the output end of the main control board. The control board in the control instruction processing module is used to configure the parameters of the transmission system based on the control instruction signal. The transmission system includes the medium wave wireless transmission device and the transmission device.

[0006] According to a medium wave wireless transmission device provided by the present invention, the pre-amplification module includes an input matching circuit and an output matching circuit, and the input matching circuit and the output matching circuit sequentially include a two-stage power amplifier tube Class A amplifier and a one-stage power amplifier tube push-pull amplifier.

[0007] According to a medium wave wireless transmission device provided by the present invention, the control board is also used to collect working status information and send it to the main control board, the working status information reflects the working status of the transmission system, and the main control board generates a transmission system status signal based on the working status information and reports it to the host computer through the first transmission port.

[0008] According to a medium wave wireless transmission device provided by the present invention, the main control board includes a signal self-generator for generating the control command signal and the service radio frequency signal, and the main control board also includes a test module, and the test module is used to test the transmission system based on the control command signal and the service radio frequency signal generated by the self-generator.

[0009] According to a medium wave wireless transmission device provided by the present invention, the main control board includes a power amplifier, and the power amplifier is used to amplify the service radio frequency signal.

[0010] According to a medium wave wireless transmission device provided by the present invention, the medium wave wireless transmission device also includes: a power supply unit, the power supply unit is used to receive external input alternating current and output direct current to power the medium wave wireless transmission device, the power supply unit includes an input EMC filter circuit, a power factor correction circuit, a DC / DC conversion circuit and an output filter circuit connected in sequence, the input EMC filter circuit is also connected to an over-voltage and under-voltage sampling circuit, the output filter circuit is also connected to an output voltage and current sampling circuit, the over-voltage and under-voltage sampling circuit is used to sample the voltage in the input EMC filter circuit, the output voltage and current sampling circuit is used to sample the voltage and current in the output filter circuit, the output ends of the over-voltage and under-voltage sampling circuit and the output voltage and current sampling circuit are respectively connected to a control circuit, the control circuit outputs a control signal to the DC / DC conversion circuit based on the sampling result signals input by the over-voltage and under-voltage sampling circuit and the output voltage and current sampling circuit, and the control circuit is a shifted full-bridge soft switch control circuit.

[0011] The present invention also provides a medium wave wireless transmission control method, which is applied to the medium wave wireless transmission device as described in any one of the above items, comprising: receiving the control command signal, and configuring the parameters of the transmitting system based on the control command signal; The service radio frequency signal is received, and the service radio frequency signal is amplified and power-distributed before being sent to the transmitting device for transmission.

[0012] The medium wave wireless transmission control method provided by the present invention also includes: Acquiring working status information of the transmitting system; A transmission system status signal is generated based on the working status information, and the transmission system status signal is reported to a host computer.

[0013] The present invention also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the medium wave wireless transmission control method described in any one of the above methods is implemented.

[0014] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the computer program implements any of the above-mentioned medium wave wireless transmission control methods.

[0015] The medium wave wireless transmission device and the medium wave wireless transmission control method provided by the present invention respectively provide a first transmission port and a second transmission port in the medium wave wireless transmission device, respectively used for receiving a control instruction signal and a service radio frequency signal, output the control instruction signal to a control instruction processing module through a main control board, output the service radio frequency signal to a service radio frequency signal processing module, respectively process the service radio frequency signal and the control instruction through the service radio frequency signal processing module and the control instruction processing module, realize the transmission of the service radio frequency signal and configure the parameters of the transmission system based on the control instruction, and can realize the remote sending of the control instruction to the medium wave wireless transmission device and the automatic configuration of the parameters of the transmission system based on the control instruction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the medium wave wireless transmission device provided by the present invention.

[0018] Figure 2The present invention is a flowchart of the application of the medium wave wireless transmission device provided by the present invention to medium wave signal transmission.

[0019] Figure 3 The present invention provides a schematic diagram of control signals of a main control board in a medium wave wireless transmission device.

[0020] Figure 4 It is a principle block diagram of a power supply unit in the medium wave wireless transmission device provided by the present invention.

[0021] Figure 5 It is a principle block diagram of a power distribution module in the medium wave wireless transmission device provided by the present invention.

[0022] Figure 6 It is a principle block diagram of the pre-amplification module in the medium wave wireless transmission equipment provided by the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] As an important part of the radio station transmission system, the medium wave transmission system is used to transmit medium wave frequency signals to send sound, music, news and other types of information to a wide geographical area. This system is crucial for radio stations to ensure the effective transmission and wide coverage of information. Medium wave frequencies are usually in the range of 530kHz to 1700kHz. Due to its unique propagation characteristics, it has good reception performance. It can not only penetrate certain obstacles, but also cover a relatively large geographical area, providing reliable guarantee for long-distance communication.

[0025] However, the existing medium wave transmission system still has deficiencies in intelligent control. Specifically, the existing medium wave transmission system cannot realize automatic parameter configuration, which limits its operating efficiency and flexibility to a certain extent.

[0026] In order to solve the defects of the prior art that the control intelligence level of the medium wave transmission system is not high and the automatic parameter configuration cannot be realized, and to realize the automatic parameter configuration of the medium wave transmission system, the present invention provides a medium wave wireless transmission device and a medium wave wireless transmission control method to realize the effect of automatically configuring the parameters of the medium wave transmission system.

[0027] Combine the following Figure 1-6 The medium wave wireless transmission device provided by the present invention is described as follows: Figure 1 As shown, the medium wave wireless transmission equipment provided by the present invention includes a signal transmission port, a main control board, a control instruction processing module and a business radio frequency signal processing module, the signal transmission port includes a first transmission port and a second transmission port, the first transmission port is used to receive a control instruction signal, the second transmission port is used to receive a business radio frequency signal, and the first transmission port is a network port using serial port communication; the main control board is connected to the signal transmission port, and is used to output the control instruction signal to the control instruction processing module, and output the business radio frequency signal to the business radio frequency signal processing module; the business radio frequency signal processing module includes a pre-amplification module connected to the output end of the main control board, a power distribution module connected to the output end of the pre-amplification module, and a control board connected to the output end of the power distribution module, the control board in the business radio frequency signal processing module is used to send the business radio frequency signal output by the power distribution module to the transmitting device for transmission; the control instruction processing module includes a control board connected to the output end of the main control board, and the control board in the control instruction processing module is used to configure the parameters of the transmitting system based on the control instruction signal, and the transmitting system includes the medium wave wireless transmission equipment and the transmitting equipment.

[0028] The medium wave wireless transmission equipment provided by the present invention realizes signal classification processing by setting a first transmission port and a second transmission port. The first transmission port is specifically used to receive control command signals from a remote location, which carry specific requirements for adjusting the parameters of the transmission system; while the second transmission port receives business radio frequency signals, which carry the sound, music and other information content that need to be broadcast. After receiving the signal, the main control forwards the control command signal to the control command processing module, and at the same time guides the business radio frequency signal to the business radio frequency signal processing module. The two modules perform their respective duties. The control command processing module parses the command and accurately adjusts the various parameters of the transmission system according to the command content, such as adjusting the transmission power, frequency, etc., to realize remote automatic configuration; the business radio frequency signal processing module amplifies and modulates the received business radio frequency signal to ensure the quality of the signal and make full preparations for subsequent transmission. Through the medium wave wireless transmission equipment provided by the present invention, not only can the remote sending of control commands to the medium wave wireless transmission equipment be realized, but also the parameters of the transmission system can be flexibly and automatically configured based on these commands, which greatly improves the operation efficiency and management convenience of the medium wave transmission system.

[0029] like Figure 2As shown, the medium wave wireless transmission device provided by the present invention is applied to a transmission system, wherein the upper computer includes a fixed transmitter, and the fixed transmitter transmits the signal to the medium wave wireless transmission device in the transmission system through a transmission device (such as an optical terminal). The transmission system also includes a power amplifier unit, a synthesizer, etc. The medium wave wireless transmission device can not only receive the business radio frequency signal sent by the fixed transmitter and transmit it to the subsequent device in the transmission system for transmission, but also receive the control command signal sent by the fixed transmitter, and configure the parameters of the transmission system based on the control command signal, including the parameters of the medium wave wireless transmission device itself and the parameters of the subsequent devices in the transmission system.

[0030] Specifically, the medium wave transmitter transmits the control command signal used to configure the operating parameters of the transmission system (including the type of operation, power level, etc.) to the medium wave wireless transmission device in the transmission system through optical transmission equipment (such as an optical terminal), and the medium wave wireless transmission device modifies its own operating parameters and those of other devices in the transmission system according to the control command signal. The service terminal initiates a detection service and transmits the service RF signal to the medium wave wireless transmission device through the optical terminal. The medium wave wireless transmission device turns on the power amplifier unit in the transmission system according to the power level configured based on the control command signal, and sends the service RF signal with power distribution to multiple power amplifier units.

[0031] Furthermore, the control board in the medium wave wireless transmission equipment is also used to collect working status information and send it to the main control board. The working status information reflects the working status of the transmission system. The main control board generates a transmission system status signal based on the working status information and reports it to the host computer through the first transmission port.

[0032] The medium wave wireless transmission equipment reports the current working status of the transmission system, such as output power, output standing wave ratio, temperature of each unit or dynamic current of the power amplifier, to the host computer (transmitter) in real time, so that the transmitter can grasp the progress of the high-power transmission process and ensure the continuity of the business process. Specifically, other equipment in the transmission system (synthesizer, power amplifier unit, etc.) transmits information such as power at each level, output standing wave, temperature, dynamic current of the power amplifier, etc. to the control board in the medium wave wireless transmission equipment in real time, and the control board further sends the received information to the main control board. The main control board integrates the received information and determines whether there is any fault or early warning information, and generates the transmission system status signal with the integrated status information and possible alarm information and reports it to the transmitter. The transmitter demodulates the received signal and transmits it to the business terminal, completing a status reporting process.

[0033] In the medium wave wireless transmission device provided by the present invention, the first transmission port for receiving the control command signal adopts serial port communication. Compared with the I / O port which transmits high and low level data, the serial port data communication performs control and data reporting, has stronger anti-interference ability and larger data transmission volume. In particular, in the medium wave wireless transmission scenario, high-power medium wave radio frequency signal transmission will be generated. The serial port communication has a stronger ability to resist the coupling interference of high-power medium wave radio frequency signals, which can not only ensure the transmission of large-kilometer medium wave radio frequency signals, but also ensure the accurate and complete transmission of control commands and transmission system status signals, and improve the reliable control of the transmission system of medium wave wireless transmission.

[0034] In the medium wave wireless transmission device provided by the present invention, Figure 3 As shown in the figure, the main control board adopts ARM + FPGA architecture, which complies with the open bus architecture standard. The pre-written software is burned into the FPGA chip, and various functions are realized by loading different main control software. The main control board mainly includes the main control circuit, the upper sideband of the transmission signal, the signal AGC control, the signal filtering, the signal pre-amplification, the power amplifier pre-distortion, the power management circuit, the core voltage 1.05V, the I / O voltage 2.5V, 3.3V or 1.8V, the memory voltage 3.3V, and the maximum power consumption of each chip is 5.5W.

[0035] The medium wave wireless transmission equipment provided by the present invention uses FPGA chip to process data, and has stronger computing power, faster data processing ability and higher efficiency. Through the ARM+FGPA architecture, it complies with the open bus architecture standard, and realizes various functions by loading different main control software. The software loading is more convenient, the intelligence level is higher, the chip integration is high, the volume is smaller, and the performance is more stable and reliable.

[0036] The main control board can realize remote control or local control of the transmission system. Specifically, the main control board includes a signal generator and a test module. When remotely controlled, the control command signal and the service RF signal are received from the signal transmission port, and when locally controlled, the signal generator locally generates the control command signal and the service RF signal. The test module tests the transmission system based on the control command signal and the service RF signal generated by the generator. Specifically, after the generator generates the control command signal and the service RF signal, the test module can collect the working status of each unit module in the control command processing module and the service RF signal processing module, and determine whether the medium wave wireless transmission equipment is operating normally based on the processing structure.

[0037] By setting up a signal generator and a test module in the main control board, self-inspection, testing and auxiliary maintenance of the equipment can be realized, and the working status of each unit module can be displayed on the terminal software, thereby improving the troubleshooting efficiency of the transmitting system in medium wave wireless transmission.

[0038] In the medium wave wireless transmission device provided by the present invention, the service radio frequency signal is amplified and processed to achieve high-power transmission. Specifically, the main control board first inputs the service radio frequency signal to the pre-amplifier for amplification, and the pre-amplifier inputs the amplified service radio frequency signal to the power distribution module. The power distribution module divides the video signal output by the pre-amplifier module, and outputs the divided radio frequency signal to the sub-control unit in the control board, so that the divided radio frequency signal can be transmitted to several antennas through subsequent equipment in the transmission system for transmission.

[0039] Specifically, if Figure 6 As shown, the pre-amplification module includes an input matching circuit and an output matching circuit, and the input matching circuit and the output matching circuit include a two-stage power amplifier tube Class A amplifier and a one-stage power amplifier tube push-pull amplifier in sequence.

[0040] The pre-amplification module in the medium wave wireless transmission device provided by the present invention adopts three-stage amplification, the first two stages adopt Class A amplification circuits, and the last stage adopts push-pull amplification, achieving a total gain Gp=40dB±0.5dB and a maximum output power of 400W.

[0041] Furthermore, in a possible implementation, the main control board in the medium wave wireless transmission device provided by the present invention also includes a power amplifier for amplifying the service radio frequency signal. In this way, through multiple amplifications, the service radio frequency signal can also be amplified. Furthermore, the pre-amplification module in the medium wave wireless transmission device provided by the present invention also includes a DC bias circuit, the input end of the DC bias circuit is used to receive an enable signal (PTT) input from the main control board to the pre-amplification module, and the output end is connected to the first-stage amplifier in the pre-amplification module. When the enable signal is valid, the DC bias circuit controls the first-stage amplifier in the pre-amplification module to be in a working state, so that the main control board can control whether the pre-amplifier is working.

[0042] The medium wave wireless transmission equipment provided by the present invention also includes a power supply unit, which uses the AC power supply of the cabin to power the unit module in the medium wave wireless transmission equipment. Specifically, the power supply unit is used to receive external input AC power and output DC power to power the medium wave wireless transmission equipment. The power supply adopts high-efficiency switching power supply technology to complete the function of converting AC 380V (-20%, +20%), 50Hz±3Hz into the required DC. The power conversion efficiency can reach more than 90%, and at the same time provide the required DC power for the four-way synthesizer and synthesizer.

[0043] like Figure 4As shown, the power supply unit includes an input EMC filter circuit, a power factor correction circuit, a DC / DC conversion circuit and an output filter circuit which are connected in sequence. The input EMC filter circuit is also connected to an over-voltage and under-voltage sampling circuit, and the output filter circuit is also connected to an output voltage and current sampling circuit. The over-voltage and under-voltage sampling circuit is used to sample the voltage in the input EMC filter circuit, and the output voltage and current sampling circuit is used to sample the voltage and current in the output filter circuit. The output ends of the over-voltage and under-voltage sampling circuit and the output voltage and current sampling circuit are respectively connected to the control circuit. The control circuit outputs a control signal to the DC / DC conversion circuit based on the sampling result signals input by the over-voltage and under-voltage sampling circuit and the output voltage and current sampling circuit. The control circuit is a shifted full-bridge soft switch control circuit.

[0044] In the power supply unit of the medium wave wireless transmission device provided by the present invention, an over-voltage and under-voltage sampling circuit and an output voltage and current sampling circuit are simultaneously provided. The existence of these two circuits enables the power supply unit to monitor the current and voltage status in real time. Once an abnormal phenomenon such as overvoltage, undervoltage or current abnormality is detected, the abnormal current and voltage phenomenon can be quickly and accurately located. Compared with the traditional power supply unit, this design significantly enhances the ability of troubleshooting, reduces misdiagnosis or missed diagnosis caused by inaccurate fault location, and has a stronger ability of troubleshooting, thereby greatly shortening the time for equipment maintenance and improving the overall equipment operation efficiency and reliability.

[0045] In the medium wave wireless transmission equipment provided by the present invention, the power supply design focuses on the reliability, maintainability, safety and electromagnetic compatibility design of the product, and adopts advanced phase-shifted full-bridge soft switching control technology. The phase-shifted full-bridge circuit adopts zero current zero voltage (ZCS-ZVS) soft switching technology. When the power switch tube is turned on or off, the voltage or current on the device is equal to zero, so as to achieve zero switching loss, improve the performance and reliability of the power supply, and have the characteristics of high efficiency and high power factor. At the same time, the power supply has overvoltage / undervoltage, overcurrent, short circuit and overheating protection functions, which effectively and timely protects the use of the power supply and other units.

[0046] The power distribution module in the medium wave wireless transmission device provided by the present invention is used to record the video signal output by the pre-amplification module, and output the recorded radio frequency signal to the control board, and the control board transmits the divided radio frequency signal to the subsequent devices of the transmission system respectively. The principle block diagram of the power distribution module in the medium wave wireless transmission device provided by the present invention is as follows Figure 5 As shown, it includes a primary transformer and multiple secondary transformers, and each secondary transformer outputs a corresponding RF signal.

[0047] The medium wave wireless transmission control method provided by the present invention is described below. The medium wave wireless transmission control method provided by the present invention is implemented based on the medium wave wireless transmission device described above. The medium wave wireless transmission control method described below and the medium wave wireless transmission device described above can be referred to each other.

[0048] The medium wave wireless transmission control method provided by the present invention comprises: receiving a control command signal, and configuring parameters of a transmitting system based on the control command signal; Receive business RF signals, amplify and power distribute the business RF signals, and then send them to the transmitting device for transmission.

[0049] In the medium wave wireless transmission control method provided by the present invention, the medium wave wireless transmission control device receives the control command signal and configures the parameters of the transmission system based on the control command signal, thereby realizing remote control of the parameters of the transmission system and realizing automatic configuration of the medium wave transmission system.

[0050] Furthermore, in a possible implementation, the medium wave wireless transmission control method provided by the present invention further includes: Obtaining the operating status information of the launch system; Generate a transmission system status signal based on the working status information, and report the transmission system status signal to the host computer.

[0051] The medium wave wireless transmission control method provided by the present invention reports the current working status of the transmitting system, such as output power, output standing wave ratio, temperature of each unit or dynamic current of the power amplifier, to the host computer (transmitter) in real time, so that the transmitter can grasp the progress of the high-power transmission process and ensure the continuity of the business process.

[0052] Furthermore, in a possible implementation, the medium wave wireless transmission control method provided by the present invention further includes: Generate control command signals and service radio frequency signals locally; The transmission system is tested based on the locally generated control command signals and business RF signals.

[0053] The medium wave wireless transmission control method provided by the present invention can realize self-checking, testing and auxiliary maintenance of equipment by generating control command signals and business radio frequency signals locally, display the working status of each unit module on the terminal software, and improve the troubleshooting efficiency of the transmitting system in the medium wave wireless transmission.

[0054] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the medium wave wireless transmission control method provided by the above methods. The method includes: receiving a control command signal, and configuring the parameters of the transmitting system based on the control command signal; receiving a business radio frequency signal, amplifying and power allocating the business radio frequency signal, and then sending it to the transmitting device for transmission.

[0055] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the medium wave wireless transmission control method provided by the above-mentioned methods. The method includes: receiving a control command signal, and configuring the parameters of the transmitting system based on the control command signal; receiving a business radio frequency signal, amplifying and power allocating the business radio frequency signal, and then sending it to the transmitting device for transmission.

[0056] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0057] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A medium wave wireless transmission device, characterized in that: It includes a signal transmission port, a main control board, a control instruction processing module and a business radio frequency signal processing module; The signal transmission port includes a first transmission port and a second transmission port, the first transmission port is used to receive a control command signal, the second transmission port is used to receive a service radio frequency signal, and the first transmission port is a network port using serial port communication; The main control board is connected to the signal transmission port, and is used to output the control instruction signal to the control instruction processing module, and output the service radio frequency signal to the service radio frequency signal processing module; The service RF signal processing module includes a pre-amplification module connected to the output end of the main control board, a power distribution module connected to the output end of the pre-amplification module, and a control board connected to the output end of the power distribution module. The control board in the service RF signal processing module is used to send the service RF signal output by the power distribution module to the transmitting device for transmission; The control instruction processing module includes the control board connected to the output end of the main control board. The control board in the control instruction processing module is used to configure the parameters of the transmission system based on the control instruction signal. The transmission system includes the medium wave wireless transmission device and the transmission device.

2. The medium wave wireless transmission device according to claim 1, characterized in that: The pre-amplification module comprises an input matching circuit and an output matching circuit, wherein a two-stage power amplifier tube Class A amplifier and a one-stage power amplifier tube push-pull amplifier are sequentially included between the input matching circuit and the output matching circuit.

3. The medium wave wireless transmission device according to claim 1, characterized in that: The control board is also used to collect working status information and send it to the main control board, the working status information reflects the working status of the transmitting system, and the main control board generates a transmitting system status signal based on the working status information and reports it to the host computer through the first transmission port.

4. The medium wave wireless transmission device according to claim 1, characterized in that: The main control board includes a signal generator for generating the control command signal and the service radio frequency signal. The main control board also includes a test module for testing the transmission system based on the control command signal and the service radio frequency signal generated by the generator.

5. The medium wave wireless transmission device according to claim 1, characterized in that: The main control board includes a power amplifier, and the power amplifier is used to amplify the service radio frequency signal.

6. The medium wave wireless transmission device according to claim 1, characterized in that: The medium wave wireless transmission device also includes: a power supply unit, which is used to receive external input alternating current and output direct current to power the medium wave wireless transmission device. The power supply unit includes an input EMC filter circuit, a power factor correction circuit, a DC / DC conversion circuit and an output filter circuit connected in sequence. The input EMC filter circuit is also connected to an over-voltage and under-voltage sampling circuit, and the output filter circuit is also connected to an output voltage and current sampling circuit. The over-voltage and under-voltage sampling circuit is used to sample the voltage in the input EMC filter circuit, and the output voltage and current sampling circuit is used to sample the voltage and current in the output filter circuit. The output ends of the over-voltage and under-voltage sampling circuit and the output voltage and current sampling circuit are respectively connected to a control circuit. The control circuit outputs a control signal to the DC / DC conversion circuit based on the sampling result signals input by the over-voltage and under-voltage sampling circuit and the output voltage and current sampling circuit. The control circuit is a shifted full-bridge soft switch control circuit.

7. A medium wave wireless transmission control method, characterized in that: The medium wave wireless transmission device according to any one of claims 1 to 6 comprises: receiving the control command signal, and configuring the parameters of the transmitting system based on the control command signal; The service radio frequency signal is received, and the service radio frequency signal is amplified and power-distributed before being sent to the transmitting device for transmission.

8. The medium wave wireless transmission control method according to claim 7, characterized in that: Also includes: Acquiring working status information of the transmitting system; A transmission system status signal is generated based on the working status information, and the transmission system status signal is reported to a host computer.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the medium wave wireless transmission control method as claimed in any one of claims 7 to 8 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the medium wave wireless transmission control method as claimed in any one of claims 7 to 8 is implemented.

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