A transmitter control system

Abstract

The present disclosure provides a transmitter control system, comprising: a control module, a tuning module and a sampling protection module; the tuning module is respectively connected to the control module and the tuner of the transmitter, and is used to control the tuner to tune the signal according to the tuning control signal sent by the control module; the sampling protection module is respectively connected to the transmitter and the control module, and is used to obtain the sampling signal from the transmitter, and control the on and off of the transmitter's electron tube according to the sampling signal. The tuning module can adjust the internal electrical parameters accordingly to achieve impedance matching; the sampling protection module can sample sampling signals that can characterize its working status, and by analyzing these signals, it can judge the working status and perform corresponding protection control to achieve protection of the transmitter. In summary, the transmitter control system provided by the present disclosure can match transmitters of different powers, and can monitor the transmitter status in real time and provide protection control.

Description

Technical Field

[0001] The present disclosure relates to the field of radio frequency communications, and in particular to a transmitter control system. Background Art

[0002] Medium and short wave (MW) transmitters are widely used in broadcasting, communications, navigation, and emergency response. Electron tubes, the core components of transmitters, control electron flow through electric fields to achieve signal transmission and other functions. However, they inherently consume high power, generate high heat, and have a short lifespan. The harsh operating conditions of transmitters place extremely high demands on control system design. Traditional control systems rely on relay logic and discrete feedback circuits, resulting in insufficient control accuracy and delayed response, significantly shortening the lifespan of the tubes and failing to dynamically compensate for operating parameter deviations. Furthermore, existing control systems are generally designed based on a single transmitter, often using independent architectures. Controlling different transmitters presents shortcomings such as protocol incompatibility, heterogeneous user interfaces, and complex parameter configuration. When switching between transmitters for communication or adjusting communication power, manual debugging is required, resulting in a low level of automation. Furthermore, existing control systems suffer from complex wiring structures, redundant communication between devices, inefficient troubleshooting, and low overall system energy efficiency, making them unable to meet the demands of modern, high-real-time, and highly reliable transmission. Summary of the Invention

[0003] The embodiments of the present disclosure provide a transmitter control system to solve the problem that the existing transmitter control system cannot control different transmitters, cannot detect faults in a timely manner, and cannot perform transmitter protection.

[0004] Based on the above problems, in a first aspect, an embodiment of the present disclosure provides a transmitter control system, comprising: a control module, a tuning module, and a sampling protection module;

[0005] The tuning module is connected to the control module and the tuner of the transmitter respectively, and is used to control the tuner to perform signal tuning according to the tuning control signal sent by the control module;

[0006] The sampling protection module is connected to the transmitter and the control module respectively, and is used to obtain a sampling signal from the transmitter and control the on and off of the electron tube of the transmitter according to the sampling signal.

[0007] In combination with the first aspect, in a possible implementation, the control module includes: a main control unit, a command response unit, a carrier control unit, and a modulation control unit;

[0008] The main control unit is connected to the instruction response unit, the carrier control unit and the modulation control unit respectively;

[0009] The instruction response unit is used to receive the control instruction sent by the main control unit, convert the control instruction into a digital quantity, and send the obtained control signal to the transmitter control unit of the transmitter to control the transmitter to enter the corresponding transmission mode;

[0010] The carrier control unit is configured to receive the carrier-related information sent by the main control unit and generate a corresponding carrier signal according to the waveform provided by the carrier-related information;

[0011] The modulation control unit is used to receive the modulation related information sent by the main control unit, and determine the working parameters of the modulation link of the corresponding transmitter based on the modulation related information; and generate a corresponding modulation control signal to configure the modulation link of the transmitter.

[0012] In combination with the first aspect, in a possible implementation manner, the tuning module includes: a tuning control unit and a tuning link;

[0013] The tuning control unit is configured to obtain the tuning control signal and control the corresponding tuning link according to the tuning control signal;

[0014] The tuning link is connected to the tuner of the transmitter, and the tuning link is used to configure electrical parameters of the tuner of the transmitter to tune the carrier signal according to the tuning control signal.

[0015] In combination with the first aspect, in a possible implementation manner, the tuning link includes: a driver, an encoder, and a servo motor;

[0016] The driver is configured to receive the tuning control signal and convert the tuning control signal into a servo motor control signal;

[0017] The encoder is used to transmit the servo motor control signal to the servo motor, and collect the operation information of the servo motor and send it to the driver;

[0018] The servo motor is used to operate according to the servo motor control signal, driving the electrical parameters of the electrical components in the transmitter tuner to change.

[0019] In combination with the first aspect, in a possible implementation, the sampling protection module includes: a signal sampling unit, a first filtering unit, and a first signal conversion unit;

[0020] The signal sampling unit is connected to the electron tube of the transmitter and is used to sample the electrical signals of each pole of the electron tube of the transmitter;

[0021] The first filtering unit is configured to filter the electrical signal sampled by the signal sampling unit and output the filtered signal to the first signal conversion unit;

[0022] The first signal conversion unit is used to perform digital-to-analog conversion on the electrical signal and send the converted signal to the control module;

[0023] The control module is used to obtain a protection signal according to the electrical signal using a preset judgment method, and control the on and off of the electron tube of the transmitter according to the protection signal.

[0024] In combination with the first aspect, in one possible implementation, the control module is configured to compare the electrical signal with a preset first threshold value, and generate a protection signal when the electrical signal is greater than the preset first threshold value; and / or

[0025] Determine the change rate of the electrical signal based on the corresponding relationship between the electrical signal and time, compare the change rate with a preset second threshold, and generate a protection signal when the change rate is greater than the preset second threshold.

[0026] In combination with the first aspect, in a possible implementation manner, the device further includes a feedback monitoring module; the feedback monitoring module is configured to obtain an incident electrical signal and a reflected electrical signal of the transmitter;

[0027] The feedback monitoring module includes: a coupling unit and two signal acquisition links;

[0028] The coupling unit is connected to the output end of the electron tube of the transmitter and the antenna of the transmitter respectively, and is used to separate the signals in different directions between the output end of the electron tube and the antenna of the transmitter, and input them into the two signal acquisition links respectively;

[0029] The signal acquisition link is used to process the input signal and output the incident electrical signal and the reflected electrical signal obtained respectively to the control module;

[0030] The control module is used to determine the current standing wave ratio of the transmitter according to the incident electrical signal and the reflected electrical signal, and to adjust and send a tuning control signal according to the standing wave ratio.

[0031] In combination with the first aspect, in a possible implementation, the signal acquisition link includes: an attenuation unit, a second filtering unit, a gain unit, and a second signal conversion unit;

[0032] The attenuation unit is used to attenuate the input signal;

[0033] The second filtering unit is used to filter the input signal according to a preset frequency;

[0034] The gain unit is used to gain the input signal;

[0035] The second signal conversion unit is used to perform analog-to-digital conversion on the input signal.

[0036] In combination with the first aspect, in a possible implementation manner, the signal sampling unit is further connected to the carrier control unit and the modulation control unit respectively;

[0037] The signal sampling unit is further configured to sample the electrical signals of the carrier control unit and the modulation control unit, and transmit the electrical signals to the main control unit via the first filtering unit and the first signal conversion unit;

[0038] The main control unit is used to determine the working status of the carrier control unit and the modulation control unit according to the electrical signal, and send power control instructions to the corresponding units to adjust the working status of the corresponding units.

[0039] In combination with the first aspect, in a possible implementation manner, the control module further includes: a switch;

[0040] The switch is used to implement data forwarding between the main control unit and the instruction response unit; and to implement data forwarding between the tuning module and the main control unit.

[0041] The beneficial effects of the embodiments of the present disclosure include:

[0042] The embodiment of the present disclosure provides a transmitter control system, comprising: a control module, a tuning module, and a sampling protection module; the tuning module is respectively connected to the control module and the tuner of the transmitter, and is used to control the tuner to tune the signal according to the tuning control signal sent by the control module; the sampling protection module is respectively connected to the transmitter and the control module, and is used to obtain a sampling signal from the transmitter and control the on and off of the transmitter's electron tube according to the sampling signal. Among them, the tuning module can adjust the internal electrical parameters according to the power output of different transmitters to achieve impedance matching, so that the power output of the transmitter can be transmitted efficiently and with low loss; the sampling protection module can sample the sampling signals of the transmitter and the transmitter control system when they are working, which can represent their working status. By analyzing these signals, it is determined whether the transmitter is in normal working state, and the control module performs corresponding protection control, thereby protecting the transmitter. In summary, the transmitter control system provided by the present disclosure can match transmitters of different power, monitor the transmitter status in real time, and provide protection control. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1A schematic structural diagram of a transmitter control system provided in an embodiment of the present disclosure;

[0044] Figure 2 A schematic diagram of the structure of a tuning link provided in an embodiment of the present disclosure;

[0045] Figure 3 A schematic diagram of the structure of a sampling protection module provided in an embodiment of the present disclosure;

[0046] Figure 4 A schematic diagram of a protection signal generation process according to an embodiment of the present disclosure;

[0047] Figure 5 A schematic diagram of the structure of the feedback monitoring module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] The present disclosure provides a transmitter control system. Preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are intended only to illustrate and explain the present disclosure and are not intended to limit the present disclosure. Furthermore, the embodiments and features within the embodiments may be combined with one another unless there is a conflict.

[0049] The embodiment of the present disclosure provides a transmitter control system, such as Figure 1 As shown, it includes: a control module 1, a tuning module 2 and a sampling protection module 3;

[0050] The tuning module 2 is connected to the control module 1 and the tuner of the transmitter respectively, and is used to control the tuner to tune the signal according to the tuning control signal sent by the control module 1;

[0051] The sampling protection module 3 is connected to the transmitter and the control module 1 respectively, and is used to obtain a sampling signal from the transmitter and control the on and off of the electron tube of the transmitter according to the sampling signal.

[0052] In embodiments of the present disclosure, a transmitter can be a device that can load audio, data, or other information signals onto high-frequency radio waves and transmit them via an antenna, thereby achieving long-distance wireless communication or broadcasting. The transmitter may include a transmitter control unit, an electron tube, an antenna, a carrier signal processing link, and a modulation link. The transmitter control unit can enter different transmission modes based on external commands and provide corresponding modulation schemes for the corresponding transmission modes. The carrier signal processing link can process the carrier signal (for example, amplifying the signal, providing a drive level for the signal, or filtering out harmonics, spurious, and other noise in the signal) before transmitting the carrier signal to the electron tube. The carrier signal processing link may include components such as amplifiers and filters. The modulation link can process the information to be transmitted and convert it into an information signal that can be loaded onto the carrier signal. The modulation link may include modules that control the screen grid and plate of the electron tube. These modules can be driven by modulation control signals to dynamically change the screen voltage and screen grid voltage, thereby loading the information signal and carrier signal onto the electron tube. The electron tube, as the core component of the transmitter, can load the information signal and carrier signal together, amplify them, and output them to the antenna for ultimate transmission.

[0053] The transmitter control system provided by the present invention can be used as a replacement for the existing transmitter control system. As a universal control system, it can control the existing execution devices of different transmitters. This method can be used to update the existing transmitter control method so that it can adapt to modern high-real-time and high-reliability transmission requirements.

[0054] The control module 1 can receive external control and generate corresponding control instructions to control corresponding components of the transmitter or other devices in the transmitter control system.

[0055] Tuning Module 2 controls the transmitter's tuner based on the tuning control signal, controlling the frequency band of the carrier signal processing link's output signal, filtering out harmonics of non-target frequencies to prevent inter-band interference, and simultaneously performing impedance matching to reduce input signal reflections. Tuning Module 2 adjusts the tuner's electrical parameters according to the power of different signals to achieve impedance matching, enabling the transmitter's output power to be transmitted efficiently and with low loss.

[0056] The sampling protection module 3 can sample the signals (i.e., sampling signals) that can represent the working status of the transmitter and the transmitter control system when they are working. By analyzing these signals, it can be determined whether the transmitter is in a normal working state, and the control module 1 can perform corresponding control (for example, lowering the power or emergency power off, etc.) to achieve protection of the transmitter.

[0057] In another embodiment provided by the present disclosure, Figure 1 As shown, the control module 1 includes: a main control unit 11, a command response unit 12, a carrier control unit 13 and a modulation control unit 14;

[0058] The main control unit 11 is connected to the instruction response unit 12, the carrier control unit 13 and the modulation control unit 14 respectively;

[0059] The instruction response unit 12 is used to receive the control instruction sent by the main control unit 11, convert the control instruction into a digital quantity, and send the obtained control signal to the transmitter control unit of the transmitter to control the transmitter to enter the corresponding transmission mode;

[0060] The carrier control unit 13 is configured to receive the carrier-related information sent by the main control unit 11 and generate a corresponding carrier signal according to the waveform provided by the carrier-related information;

[0061] The modulation control unit 14 is used to receive the modulation related information sent by the main control unit 11, and determine the working parameters of the modulation link of the corresponding transmitter according to the modulation related information; and generate corresponding modulation control signals to configure the modulation link of the transmitter.

[0062] In the disclosed embodiment, the main control unit 11 may be the core component of the control module 1. It can generate corresponding control instructions based on external control and send them to the corresponding units, which then execute the corresponding instructions. In practical applications, the main control unit 11 may be implemented as a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC), etc., which has signal transmission, calculation, and control functions.

[0063] The command response unit 12 receives control commands from the main control unit 11 and generates corresponding digital control signals based on these commands. These signals are then sent to the transmitter control unit of the transmitter, thereby controlling the transmitter to enter the corresponding operating state. This operating state can refer to turning the transmitter on or off, or changing the transmitter's modulation state. In practical applications, the command response unit 12 can be implemented as a programmable logic controller (PLC). This PLC interprets control commands, performs logical control, and generates corresponding digital signals (for example, a high-level output indicates transmitter activation, while a low-level output indicates transmitter deactivation). Because different transmitter control units can receive control commands using different communication protocols, the PLC can be configured to generate digital signals based on the communication protocol recognized by the desired transmitter control unit, thereby enabling a universal control system to control different transmitter control units.

[0064] The carrier control unit 13 can receive carrier-related information sent by the main control unit 11. This carrier-related information may include the waveform of the carrier signal to be generated, as well as key parameters that characterize the carrier signal, such as the frequency, amplitude, and phase of the carrier signal. Based on this carrier-related information, the carrier control unit 13 can generate a corresponding carrier signal and output the carrier signal to the transmitter's carrier signal processing chain. In practical applications, the carrier control unit 13 can be implemented as a direct digital synthesizer (DDS), which can directly synthesize an analog waveform of the desired frequency digitally using components such as a phase accumulator. It can also be implemented as an analog oscillator circuit, which can generate an analog waveform by generating self-oscillation using components such as an inductor-capacitor oscillator (LC oscillator) or a crystal oscillator.

[0065] The modulation control unit 14 receives modulation-related information from the main control unit 11. This modulation-related information can be digitized from the original signal (e.g., audio and messages) sent by the main control unit 11. This modulation-related information is sent to the modulation control unit 14, which determines the amplitude, power, and other information of the target signal based on the modulation-related information. The modulation control unit 14 then generates a modulation control signal to control the corresponding voltage control element in the transmitter's modulation chain (e.g., the curtain grid voltage control module or the screen voltage control module) to change the output voltage. This modulation control signal can be a pulse width modulation (PWM) signal or other modulation signal, such as a linear modulation signal.

[0066] In practical applications, each voltage-controlled element in a modulation chain may include multiple power output units. Each power output unit can output a corresponding voltage based on a modulation control signal. Ultimately, the voltages output by all power output units in the voltage-controlled element are summed to form the voltage input to the corresponding transmitter tube electrode. The modulation control unit 14 can be connected to each power output unit in the voltage-controlled element via multiple signal transmission lines to control each power output unit to output a corresponding voltage. For example, if the modulation control signal is a PWM signal, the output voltage of the power output unit can be changed by adjusting the duty cycle of the PWM signal. A larger duty cycle results in a higher voltage output from the power output unit, while a smaller duty cycle results in a lower voltage output from the power output unit. Generally speaking, a voltage-controlled element in a transmitter capable of outputting higher power may include more power output units. The transmitter control system provided herein can predetermine the corresponding modulation control signal and the number of signal transmission lines based on the desired transmitter output power and the number of power output units. In one possible embodiment, the signal transmission lines between the modulation control unit 14 and the corresponding voltage-controlled element in the modulation chain can utilize optical signal transmission, with the transmission medium being optical fiber.

[0067] It should be noted that different transmitters may use different modulation methods. Different modulation methods require different electrodes of the transmitter electron tube with targeted voltage control. For example, in the anode modulation of amplitude modulation (AM), the gate of the electron tube can receive the input carrier signal; the modulation signal (the information signal to be sent) can be loaded onto the anode of the electron tube, and the output voltage of the electron tube can be changed by changing the anode voltage, thereby generating a corresponding amplitude modulated wave at the antenna end of the transmitter, and finally completing the signal transmission; the screen grid of the electron tube can determine a DC voltage according to the anode voltage, which can accelerate the cathode electrons and maintain the anode current stable.

[0068] In another embodiment provided by the present disclosure, Figure 1 As shown, the tuning module 2 includes: a tuning control unit 21 and a tuning link 22;

[0069] The tuning control unit 21 is configured to obtain the tuning control signal and control the corresponding tuning link 22 according to the tuning control signal;

[0070] The tuning link 22 is connected to the tuner of the transmitter. The tuning link 22 is used to configure electrical parameters of the tuner of the transmitter to tune the carrier signal according to the tuning control signal.

[0071] In the disclosed embodiment, the tuning link 22 can control the tuner of the transmitter to achieve matching of the transmission power and the transmission network, accurately set the operating frequency, and optimize the resonant characteristics of the circuit so that the impedance characteristics of the circuit are optimized, thereby ensuring that the signal can pass through the entire circuit efficiently.

[0072] The tuner of the transmitter in the present disclosure can be an inductor-capacitor (LC) tuning device. The tuning link can configure the values ​​of the capacitor and inductor in the LC tuning device through a tuning control signal, so that the input impedance of the transmitter tuner matches the output impedance of the carrier signal processing link, and at the same time, the output impedance of the transmitter tuner matches the input impedance of the electron tube, thereby achieving tuning of the transmitter.

[0073] It should be noted that the number of tuners of different transmitters is determined by transmitter power or other factors. The number of tuning chains provided in the present disclosure can be determined according to the number of tuners of the transmitter, and each tuning chain can correspond to one tuner.

[0074] In another embodiment provided by the present disclosure, Figure 2 As shown, the tuning link 22 includes: a driver 221, an encoder 222 and a servo motor 223;

[0075] The driver 221 is used to receive the tuning control signal and convert the tuning control signal into a control signal for the servo motor 223;

[0076] The encoder 222 is used to transmit the control signal of the servo motor 223 to the servo motor 223 and collect the operation information of the servo motor 223 and send it to the driver 221;

[0077] The servo motor 223 is used to operate according to the control signal of the servo motor 223, thereby driving the electrical parameters of the electrical components in the tuner of the transmitter to change.

[0078] In the embodiment of the present disclosure, the driver 221 can parse the received tuning control signal and determine the electrical parameters that need to be set for the transmitter's tuner based on the tuning control signal, and further determine the rotational position of the servo motor 223 that can enable the tuner to reach such electrical parameters based on the electrical parameters, and finally send a control signal to the servo motor 223.

[0079] The driver 221 controls the encoder 222 by sending control signals. In the present disclosure, the encoder 222 transmits control signals from the servo motor 223 to the servo motor 223. Based on the control signals, the servo motor 223 rotates to a corresponding position, driving electrical components within the tuner to change their capacitance or inductance. The encoder 222 may also include an optical encoder 222, which may include a light source, a code disk, and a photoreceptor. The code disk may be mounted on the rotating shaft of the servo motor 223 and may be provided with multiple concentric grating tracks. The photoreceptor may receive light from an opposing light source through the gratings on the code disk. When the servo motor 223 rotates, it drives the code disk. During this rotation, the code disk obstructs the light source. The photoreceptor generates a corresponding signal based on the changes in the brightness of the sensed light, thereby recording the rotational position and number of revolutions of the servo motor 223 (i.e., operational information of the servo motor 223). The driver 221 can determine whether the servo motor 223 has operated to a specified position based on the operation information, and can correct the operating position of the servo motor 223 based on the operation information to achieve high-precision closed-loop control.

[0080] The transmitter tuner can be an LC tuning device, which can include multiple variable electrical components (for example, varactor diodes, vacuum variable capacitors, adjustable inductors, relay-switched capacitor groups, etc.). The servo motor can drive these variable electrical components to perform mechanical movement, thereby changing the values ​​of their capacitance and inductance, and further achieving impedance matching, frequency selection and filtering.

[0081] In another embodiment provided by the present disclosure, Figure 3 As shown, the sampling protection module 3 includes: a signal sampling unit 31, a first filtering unit 32 and a first signal conversion unit 33;

[0082] The signal sampling unit 31 is connected to the electron tube of the transmitter and is used to sample the electrical signals of each pole of the electron tube of the transmitter;

[0083] The first filtering unit 32 is configured to filter the electrical signal sampled by the signal sampling unit 31 and output the filtered signal to the first signal conversion unit 33;

[0084] The first signal conversion unit 33 is used to perform digital-to-analog conversion on the electrical signal and send it to the control module 1;

[0085] The control module 1 is used to obtain a protection signal according to the electrical signal using a preset judgment method, and control the on and off of the electron tube of the transmitter according to the protection signal.

[0086] In the disclosed embodiment, the signal sampling unit 31 separately acquires electrical signals from each of the transmitter's electron electrodes, such as the voltage and current of the electron tube cathode, the voltage and current of the electron tube grid, the voltage and current of the electron tube screen, and the voltage and current of the electron tube screen grid. The control module 1 can obtain these parameters from the sampling and protection module 3 and, based on these parameters, determine whether the electron tube's operating status is normal using a predetermined determination method, thereby generating a protection signal to control the on and off of the transmitter's electron tube, thereby protecting the transmitter's electron tube.

[0087] Here, the transmitter tube can be turned on and off by sending a control signal through the instruction response unit 12 to control the transmitter to be turned off, or a switch device can be set at each pole of the tube to directly control these switch devices to quickly cut off the power of the tube for protection.

[0088] The first filtering unit 32 can be a filter that can filter out noise interference in the signal; the first signal conversion unit 33 can be an analog-to-digital converter that can convert an analog signal into a digital signal, which can convert the analog quantity of the collected electrical signal into a digital signal that can be recognized by the control module 1.

[0089] In another embodiment provided by the present disclosure, the control module 1 is configured to compare the electrical signal with a preset first threshold value, and generate a protection signal when the electrical signal is greater than the preset first threshold value; and / or

[0090] Determine the change rate of the electrical signal based on the corresponding relationship between the electrical signal and time, compare the change rate with a preset second threshold, and generate a protection signal when the change rate is greater than the preset second threshold.

[0091] In the embodiment of the present disclosure, the subject that executes the above-mentioned judgment process may be a main control unit in the control module, or may be a specially configured execution unit with functions such as calculation and judgment.

[0092] The protection signal generation process provided by the present disclosure can be performed as follows Figure 4 The flowchart shown.

[0093] S401: Sampling analog electrical signals. The signal sampling unit 31 can acquire electrical signals from each electrode of the transmitter, such as the voltage and current of the electron tube cathode, the voltage and current of the electron tube grid, the voltage and current of the electron tube screen, and the voltage and current of the electron tube screen grid, and transmit these electrical signals to the first filtering unit.

[0094] S402: Electric signal filtering: The first filtering unit 32 can filter out noise interference in the input electric signal to improve the accuracy of the sampling result.

[0095] S403: Electric signal conversion: The first signal conversion unit 33 can convert the analog electric signal into a digital signal and output it to the control module.

[0096] S404: Determine based on the electrical signal value and the first threshold. In the present disclosure, a threshold (i.e., a first threshold) may be pre-determined for each type of sampled electrical signal. The first threshold may be a critical value for the electrical signal that ensures the normal operation of the corresponding transmitter. Operating above this threshold may cause damage to the device or reduce its lifespan. The first threshold corresponding to each type of electrical signal may be pre-stored in the control module 1. When the sampled electrical signal value exceeds the first threshold, it indicates that the transmitter is in an abnormal state. Based on the determination result, a corresponding protection signal may be output.

[0097] S405: Determine the electrical signal conversion rate. In the present disclosure, the electrical signal change rate can also be determined based on the ratio of the electrical signal to time.

[0098] S406: Determine based on the rate of change value and the second threshold value. Compare the predetermined second threshold value with the rate of change of the electrical signal. If the rate of change of the electrical signal is greater than the second threshold value, it indicates that the current transmitter may be in an abnormal operating state. The control module 1 may output a corresponding protection signal based on the determination result.

[0099] In another embodiment provided by the present disclosure, Figure 1 As shown, it also includes a feedback monitoring module 4; the feedback monitoring module 4 is used to obtain the incident electrical signal and the reflected electrical signal of the transmitter;

[0100] like Figure 5 As shown, the feedback monitoring module 4 includes: a coupling unit 41 and two signal acquisition links 42;

[0101] The coupling unit 41 is connected to the output end of the electron tube of the transmitter and the antenna of the transmitter respectively, and is used to separate the signals in different directions between the output end of the electron tube and the antenna of the transmitter, and input them into the two signal acquisition links 42 respectively;

[0102] The signal acquisition link 42 is used to process the input signal and output the incident electrical signal and the reflected electrical signal obtained respectively to the control module 1;

[0103] The control module 1 is configured to determine a current standing wave ratio of the transmitter according to the incident electrical signal and the reflected electrical signal, and to adjust and send a tuning control signal according to the standing wave ratio.

[0104] In the disclosed embodiments, the standing wave ratio (SWR) measures the impedance matching within a transmitter. When a tube transmits a radio frequency signal to an antenna, this signal is referred to as the incident electrical signal. If the impedance of the antenna does not match the characteristic impedance of the tube, a portion of the signal is reflected back, forming a reflected electrical signal.

[0105] The feedback monitoring module 4 provided by the present disclosure, wherein the coupling unit 41 can be a directional coupler, which can only couple signals propagating in a specific direction, thereby separating the electrical signals in two directions (i.e., the incident electrical signal and the reflected electrical signal), and outputting the two separated signals to the two signal acquisition links 42 respectively. After being processed by the signal acquisition link 42, a signal that can be recognized by the control module 1 is obtained. Furthermore, the control module 1 calculates the standing wave ratio based on the voltage values ​​of the two signals, and the calculation formula can be shown as the following formula (1).

[0106] (1)

[0107] In the above formula (1), VSWR is the voltage standing wave ratio. is the reflection coefficient, ,in, is the voltage value of the reflected electrical signal, is the voltage value of the incident electrical signal.

[0108] The closer the value is to 1, the better the impedance matching in the transmitter is. If the value of is greater than 2, it can be considered that the impedance matching in the transmitter is seriously poor and there may be a problem with the transmitter. The control module 1 can send a shutdown control signal to control the transmitter to shut down and further perform a shutdown inspection. When the value of is between 1 and 2, the control module 1 can send a tuning control signal to control the tuning module 2 to perform impedance matching, changing The value of .

[0109] In another embodiment provided by the present disclosure, Figure 5 As shown, the signal acquisition link 42 includes: an attenuation unit 421, a second filtering unit 422, a gain unit 423 and a second signal conversion unit 424;

[0110] The attenuation unit 421 is used to attenuate the input signal;

[0111] The second filtering unit 422 is configured to filter the input signal according to a preset frequency;

[0112] The gain unit 423 is used to gain the input signal;

[0113] The second signal conversion unit 424 is configured to perform analog-to-digital conversion on the input signal.

[0114] In the embodiment of the present disclosure, the attenuation unit 421 can controllably reduce the power of the electrical signal passing through it without introducing distortion or changing the frequency characteristics of the signal, which can protect other components and match the dynamic range of subsequent components.

[0115] The second filtering unit 422 can suppress redundant frequency components, thereby filtering out noise in the signal and ensuring the purity of the collected signal.

[0116] The gain unit 423 may be a low noise amplifier, which may amplify the signal according to a set gain, thereby increasing the signal amplitude without introducing new noise.

[0117] The second signal conversion unit 424 may be an analog-to-digital conversion circuit, which converts the collected analog signal into a digital signal that can be recognized by the control module 1 .

[0118] In another embodiment provided by the present disclosure, the signal sampling unit 31 is further connected to the carrier control unit 13 and the modulation control unit 14 respectively;

[0119] The signal sampling unit 31 is further configured to sample the electrical signals of the carrier control unit 13 and the modulation control unit 14, and transmit the electrical signals to the main control unit 11 via the first filtering unit 32 and the first signal conversion unit 33;

[0120] The main control unit 11 is used to determine the working status of the carrier control unit 13 and the modulation control unit 14 according to the electrical signal, and send power control instructions to the corresponding units to adjust the working status of the corresponding units.

[0121] In the disclosed embodiment, the signal sampling unit 31 can also collect the electrical signal values ​​of the carrier control unit 13 and the modulation control unit 14 during operation. The main control unit 11 can determine the operating status of the corresponding unit based on the value of the electrical signal and generate a corresponding power control instruction, which is sent to the corresponding carrier control unit 13 or modulation control unit 14 to adjust the operating power of the corresponding unit to protect the corresponding unit.

[0122] In another embodiment provided by the present disclosure, Figure 1 As shown, the control module 1 further includes: a switch 15;

[0123] The switch 15 is used to implement data forwarding between the main control unit 11 and the instruction response unit 12 ; and to implement data forwarding between the tuning module 2 and the main control unit 11 .

[0124] In the embodiment of the present disclosure, the switch may be a device for network communication, which may establish data connections between the main control unit 11 and the instruction response unit 12 and between the tuning module 2 and the main control unit 11 to achieve forwarding of data and instructions.

[0125] Through the above description of the embodiments, those skilled in the art will clearly understand that the embodiments of the present disclosure can be implemented through hardware or through software plus the necessary general-purpose hardware platform. Based on this understanding, the technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, or mobile hard drive) and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in the various embodiments of the present disclosure.

[0126] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes in the accompanying drawings are not necessarily required for implementing the present disclosure.

[0127] Those skilled in the art will appreciate that the modules in the devices of the embodiments may be distributed in the devices of the embodiments as described in the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module or further split into multiple submodules.

[0128] The serial numbers of the above-mentioned embodiments of the present disclosure are for description only and do not represent the advantages or disadvantages of the embodiments.

[0129] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A transmitter control system, characterized in that: include: Control module, tuning module and sampling protection module; The tuning module is connected to the control module and the tuner of the transmitter respectively, and is used to control the tuner to perform signal tuning according to the tuning control signal sent by the control module; The sampling protection module is connected to the transmitter and the control module respectively, and is used to obtain a sampling signal from the transmitter and control the on and off of the electron tube of the transmitter according to the sampling signal.

2. The system according to claim 1, wherein The control module includes: a main control unit, a command response unit, a carrier control unit and a modulation control unit; The main control unit is connected to the instruction response unit, the carrier control unit and the modulation control unit respectively; The instruction response unit is used to receive the control instruction sent by the main control unit, convert the control instruction into a digital quantity, and send the obtained control signal to the transmitter control unit of the transmitter to control the transmitter to enter the corresponding transmission mode; The carrier control unit is configured to receive the carrier-related information sent by the main control unit and generate a corresponding carrier signal according to the waveform provided by the carrier-related information; The modulation control unit is used to receive the modulation related information sent by the main control unit, and determine the working parameters of the modulation link of the corresponding transmitter based on the modulation related information; and generate a corresponding modulation control signal to configure the modulation link of the transmitter.

3. The system according to claim 1, wherein: The tuning module includes: a tuning control unit and a tuning link; The tuning control unit is configured to obtain the tuning control signal and control the corresponding tuning link according to the tuning control signal; The tuning link is connected to the tuner of the transmitter, and the tuning link is used to configure electrical parameters of the tuner of the transmitter to tune the carrier signal according to the tuning control signal.

4. The system according to claim 3, wherein: The tuning link includes: a driver, an encoder and a servo motor; The driver is configured to receive the tuning control signal and convert the tuning control signal into a servo motor control signal; The encoder is used to transmit the servo motor control signal to the servo motor, and collect the operation information of the servo motor and send it to the driver; The servo motor is used to operate according to the servo motor control signal, driving the electrical parameters of the electrical components in the transmitter tuner to change.

5. The system according to claim 2, wherein: The sampling protection module includes: a signal sampling unit, a first filtering unit and a first signal conversion unit; The signal sampling unit is connected to the electron tube of the transmitter and is used to sample the electrical signals of each pole of the electron tube of the transmitter; The first filtering unit is configured to filter the electrical signal sampled by the signal sampling unit and output the filtered signal to the first signal conversion unit; The first signal conversion unit is used to perform digital-to-analog conversion on the electrical signal and send the converted signal to the control module; The control module is used to obtain a protection signal according to the electrical signal using a preset judgment method, and control the on and off of the electron tube of the transmitter according to the protection signal.

6. The system according to claim 5, wherein: The control module is configured to compare the electrical signal with a preset first threshold value, and generate a protection signal when the electrical signal is greater than the preset first threshold value; and / or Determine the change rate of the electrical signal based on the corresponding relationship between the electrical signal and time, compare the change rate with a preset second threshold, and generate a protection signal when the change rate is greater than the preset second threshold.

7. The system according to claim 1, wherein: It also includes a feedback monitoring module; the feedback monitoring module is used to obtain the incident electrical signal and the reflected electrical signal of the transmitter; The feedback monitoring module includes: a coupling unit and two signal acquisition links; The coupling unit is connected to the output end of the electron tube of the transmitter and the antenna of the transmitter respectively, and is used to separate the signals in different directions between the output end of the electron tube and the antenna of the transmitter, and input them into the two signal acquisition links respectively; The signal acquisition link is used to process the input signal and output the incident electrical signal and the reflected electrical signal obtained respectively to the control module; The control module is used to determine the current standing wave ratio of the transmitter according to the incident electrical signal and the reflected electrical signal, and to adjust and send a tuning control signal according to the standing wave ratio.

8. The system according to claim 7, wherein: The signal acquisition link includes: an attenuation unit, a second filtering unit, a gain unit and a second signal conversion unit; The attenuation unit is used to attenuate the input signal; The second filtering unit is used to filter the input signal according to a preset frequency; The gain unit is used to gain the input signal; The second signal conversion unit is used to perform analog-to-digital conversion on the input signal.

9. The system according to claim 5, wherein: The signal sampling unit is further connected to the carrier control unit and the modulation control unit respectively; The signal sampling unit is further configured to sample the electrical signals of the carrier control unit and the modulation control unit, and transmit the electrical signals to the main control unit via the first filtering unit and the first signal conversion unit; The main control unit is used to determine the working status of the carrier control unit and the modulation control unit according to the electrical signal, and send power control instructions to the corresponding units to adjust the working status of the corresponding units.

10. The system according to claim 2, wherein: The control module further includes: a switch; The switch is used to implement data forwarding between the main control unit and the instruction response unit; and to implement data forwarding between the tuning module and the main control unit.

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