Transmitter control system

Abstract

The invention provides a transmitter control system. The transmitter control system comprises a control module, a tuning module and a sampling protection module, the tuning module is respectively connected with the control module and a tuner of the transmitter, and is used for controlling the tuner to carry out signal tuning according to a tuning control signal sent by the control module; the sampling protection module is connected with the transmitter and the control module, and is used for obtaining the sampling signal from the transmitter, and controlling the on-off of an electron tube of the transmitter according to the sampling signal. The tuning module can correspondingly adjust internal electrical parameters to realize impedance matching; the sampling protection module can sample sampling signals capable of representing the working state of the sampling protection module, the working state is judged by analyzing the signals, corresponding protection control is carried out, and protection of the transmitter is achieved. In conclusion, the transmitter control system provided by the invention can be matched with transmitters with different powers, and can monitor the state of the transmitter in real time and provide protection control.

Description

Technical Field

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

[0002] Medium-wave and short-wave transmitters are widely used in fields such as broadcasting, communication, navigation, and emergency support. As the core component of the transmitter, the electron tube controls the electron flow through an electric field to achieve functions such as signal transmission. However, it has the characteristics of high power consumption, high heat generation, and short lifespan. The harsh working conditions of the transmitter pose extremely high requirements for the design of the control system. Traditional control systems rely on relay logic and discrete feedback circuits, suffering from problems such as insufficient control accuracy and response lag, resulting in a significant reduction in the lifespan of electron tubes and an inability to dynamically compensate for working parameter deviations. Moreover, existing control systems are generally designed based on a single transmitter and mostly adopt an independent architecture. When controlling different transmitters, there are defects such as protocol incompatibility, heterogeneous operation interfaces, and complex parameter configuration. In the case of needing to switch different transmitters for communication or adjust the communication power, it relies on manual debugging, with low automation. At the same time, the existing control system has a complex wiring structure, redundant communication between devices, low fault troubleshooting efficiency, and low overall energy efficiency of the system, making it difficult to meet the modern high-real-time and high-reliability transmission requirements. Summary of the Invention

[0003] 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 protect the transmitter.

[0004] Based on the above problems, in a first aspect, a transmitter control system provided by embodiments of the present disclosure includes: 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 configured to control the tuner to perform signal tuning 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 configured to obtain a sampling signal from the transmitter and control the on / off of the electron tube of the transmitter according to the sampling signal.

[0005] In combination with the first aspect, in a possible implementation manner, the control module includes: a main control unit, an instruction response unit, a carrier control unit, and a modulation control unit; The main control unit is respectively connected to the instruction response unit, the carrier control unit, and the modulation control unit; The instruction response unit is configured to receive the control instruction sent by the master control unit, perform digital quantity conversion on the control instruction, and send the obtained control signal to the transmitter control unit of the transmitter, so as 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 master control unit and generate a corresponding carrier signal according to the waveform provided by the carrier-related information. The modulation control unit is configured to receive the modulation-related information sent by the master control unit, determine the working parameters of the modulation link of the corresponding transmitter according to the modulation-related information, and generate a corresponding modulation control signal to configure the modulation link of the transmitter.

[0006] In a possible implementation manner in combination with the first aspect, 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 configured to tune the carrier signal by configuring the electrical parameters of the tuner of the transmitter according to the tuning control signal.

[0007] In a possible implementation manner in combination with the first aspect, 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 configured 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 configured to operate according to the servo motor control signal, driving the electrical parameters of the electrical components in the tuner of the transmitter to change.

[0008] In a possible implementation manner in combination with the first aspect, 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 configured 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 signals sampled by the signal sampling unit and output them to the first signal conversion unit. The first signal conversion unit is configured to perform digital-to-analog conversion on the electrical signals and send them to the control module. The control module is configured to obtain a protection signal according to the electrical signal by using a preset judgment method, and control the on / off of the electron tube of the transmitter according to the protection signal.

[0009] In combination with the first aspect, in a possible implementation manner, the control module is configured to compare the electrical signal with a preset first threshold, and generate a protection signal when the electrical signal is greater than the preset first threshold; and / or Determine the change rate of the electrical signal according to the correspondence 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.

[0010] In combination with the first aspect, in a possible implementation manner, it further includes a feedback monitoring module; the feedback monitoring module is configured to acquire 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 respectively connected to the output end of the electron tube of the transmitter and the antenna of the transmitter, and is configured to separate 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 configured to process the input signal, and output the obtained incident electrical signal and reflected electrical signal to the control module respectively; The control module is configured to determine the current standing wave ratio of the transmitter according to the incident electrical signal and the reflected electrical signal, and adjust the transmission tuning control signal according to the standing wave ratio.

[0011] In combination with the first aspect, in a possible implementation manner, 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 configured to attenuate the input signal; The second filtering unit is configured to filter the input signal according to a preset frequency; The gain unit is configured to amplify the input signal; The second signal conversion unit is configured to perform analog-to-digital conversion on the input signal.

[0012] In combination with the first aspect, in a possible implementation manner, the signal sampling unit is further respectively connected to the carrier control unit and the modulation control unit; 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 through the first filtering unit and the first signal conversion unit; The main control unit is configured to determine the operating states of the carrier control unit and the modulation control unit according to the electrical signals, and send power control instructions to the corresponding units to adjust the operating states of the corresponding units.

[0013] In a possible implementation manner in combination with the first aspect, the control module further includes: a switch; The switch is configured to implement data forwarding between the main control unit and the instruction response unit; and implement data forwarding between the tuning module and the main control unit.

[0014] The beneficial effects of the embodiments of the present disclosure include: A transmitter control system provided by an embodiment of the present disclosure includes: 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 configured to control the tuner to perform signal tuning according to the tuning control signal issued by the control module; the sampling protection module is respectively connected to the transmitter and the control module, and is configured to obtain a sampling signal from the transmitter and control the on / off of the electron tube of the transmitter according to the sampling signal. Among them, the tuning module can correspondingly adjust the internal electrical parameters according to the power output by different transmitters to achieve impedance matching, so that the power output by the transmitter can be efficiently and low-lossly transmitted; the sampling protection module can sample the sampling signals that can characterize the operating state when the transmitter and the transmitter control system are working, and judge whether the transmitter is in a normal operating state by analyzing these signals, and the control module performs corresponding protection control, so as to realize the protection of the transmitter. In summary, a transmitter control system provided by the present disclosure can match transmitters with different powers, and can monitor the transmitter state in real time and provide protection control. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a transmitter control system provided by an embodiment of the present disclosure; Figure 2 It is a schematic structural diagram of a tuning link provided by an embodiment of the present disclosure; Figure 3 It is a schematic structural diagram of a sampling protection module provided by an embodiment of the present disclosure; Figure 4 It is a schematic diagram of a protection signal generation process provided by an embodiment of the present disclosure; Figure 5 It is a schematic structural diagram of a feedback monitoring module provided by an embodiment of the present disclosure. Detailed Embodiments

[0016] Embodiments of the present disclosure provide a transmitter control system. The preferred embodiments of the present disclosure will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for illustrating and explaining the present disclosure and are not used to limit the present disclosure. And without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0017] Embodiments of the present disclosure provide a transmitter control system, as Figure 1 shown, including: a control module 1, a tuning module 2, and a sampling protection module 3; The tuning module 2 is respectively connected to the control module 1 and the tuner of the transmitter, and is configured to control the tuner to perform signal tuning according to the tuning control signal issued by the control module 1; The sampling protection module 3 is respectively connected to the transmitter and the control module 1, and is configured to obtain a sampling signal from the transmitter and control the on / off of the electron tube of the transmitter according to the sampling signal.

[0018] In the 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 through an antenna to achieve long-distance wireless communication or broadcasting. The transmitter can include: a transmitter control unit, an electron tube, an antenna, a carrier signal processing link, and a modulation link, etc. Among them, the control unit of the transmitter can enter different transmission modes according to external instructions and provide corresponding modulation methods for the corresponding transmission modes; the carrier signal processing link can process the carrier signal (for example, amplify the signal; provide a driving level for the signal; filter out harmonic spurs and other noises in the signal) and then send the carrier signal to the electron tube. The carrier signal processing link can include components such as an amplifier and a filter; the modulation link can process the information to be transmitted and convert this information into an information signal that can be loaded onto the carrier signal. The modulation link can include modules for controlling the screen grid and plate of the electron tube. These modules can be driven by a modulation control signal to dynamically change the screen voltage and screen grid voltage, so as to load the information signal and the carrier signal together on the electron tube; the electron tube, as the core component of the transmitter, can load the information signal and the carrier signal together, amplify them and then output them to the antenna, and finally transmit the signal.

[0019] The transmitter control system provided by the present disclosure can be used as a replacement for the existing transmitter control system. As a general control system, it can control the existing execution devices of different transmitters; through this method, the update of the existing transmitter control method can be realized, so that it can meet the modern high real-time and high reliability transmission requirements. The control module 1 can receive external control, generate corresponding control instructions, and control the corresponding devices of the transmitter or other devices in the transmitter control system.

[0020] The tuning module 2 can control the tuner of the transmitter to tune according to the tuning control signal, control the frequency band of the output signal of the carrier signal processing link, filter out the harmonics of non-target frequencies, avoid interference between frequency bands, and at the same time can perform impedance matching to reduce the reflection of the input signal. The tuning module 2 can correspondingly adjust the electrical parameters of the tuner according to the power of different signals to achieve impedance matching, so that the power output by the transmitter can be transmitted efficiently and with low loss.

[0021] The sampling protection module 3 can sample the signals (i.e., sampling signals) that can characterize the working state of the transmitter and the transmitter control system during operation. By analyzing these signals, it can determine whether the transmitter is in a normal working state, and the control module 1 performs corresponding control (for example, reducing the power or emergency power-off, etc.), so as to realize the protection of the transmitter.

[0022] In another embodiment provided by the present disclosure, as Figure 1 shown, the control module 1 includes: a main control unit 11, an instruction response unit 12, a carrier control unit 13, and a modulation control unit 14; The main control unit 11 is respectively connected to the instruction response unit 12, the carrier control unit 13, and the modulation control unit 14; The instruction response unit 12 is configured to receive the control instruction sent by the main control unit 11, perform digital quantity conversion on the control instruction, 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 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; The modulation control unit 14 is configured to receive the modulation-related information sent by the main control unit 11, determine the working parameters of the modulation link of the corresponding transmitter according to the modulation-related information; and generate a corresponding modulation control signal to configure the modulation link of the transmitter.

[0023] In the embodiment of the present disclosure, the main control unit 11 may be the core component of the control module 1. It can generate corresponding control instructions according to external control, send them to the corresponding unit, and the corresponding unit further executes the corresponding instructions. In practical applications, the main control unit 11 can be implemented as a field programmable gate array (FPGA, Field-Programmable Gate Array) or an application specific integrated circuit (ASIC, Application-Specific Integrated Circuit) and other components with signal transceiver, calculation and control functions.

[0024] The instruction response unit 12 can receive the control instructions sent by the main control unit 11, generate corresponding digital control signals according to the control instructions, and send them to the transmitter control unit of the transmitter, so as to control the transmitter to enter the corresponding working state. The working state here can refer to starting or shutting down the transmitter, or changing the modulation state of the transmitter. In practical applications, the instruction response unit 12 can be implemented as a programmable logic controller (PLC, Programmable Logic Controller), which can parse the control instructions, perform logical control, and generate corresponding digital quantities (for example, outputting a high level represents controlling the transmitter to start, and outputting a low level represents controlling the transmitter to shut down). Since different transmitter control units can receive control instructions with different communication protocols, by configuring the PLC, digital quantities can be generated according to the communication protocols recognizable by the transmitter control units to be controlled as needed, so as to realize the compatible control of different transmitter control units by a general control system.

[0025] The carrier control unit 13 can receive the carrier-related information sent by the main control unit 11. The carrier-related information can include the waveform of the carrier signal to be generated, as well as key parameters such as the frequency, amplitude, and phase of the carrier signal that can characterize the characteristics of the carrier signal. The carrier control unit 13 can generate corresponding carrier signals according to these carrier-related information and output the carrier signals to the carrier signal processing link of the transmitter. In practical applications, the carrier control unit 13 can be implemented as a direct digital synthesizer (DDS, Direct Digital Synthesis), which can directly synthesize the analog waveform of the required frequency in a digital manner using components such as a phase accumulator; it can also be implemented as an analog oscillator circuit, which can generate self-oscillation through components such as an inductor-capacitor oscillator (LC Oscillator, Inductor-Capacitor Oscillator) or a crystal oscillator, so as to generate an analog waveform.

[0026] The modulation control unit 14 can receive the modulation-related information sent by the main control unit 11. The modulation-related information here can be obtained after digitizing the original signals (such as audio and messages, etc.) sent by the main control unit 11 as needed. These modulation-related information can be sent to the modulation control unit 14, and the modulation control unit 14 can determine information such as the amplitude and power of the target signal according to the modulation-related information. And generate a modulation control signal to control the corresponding voltage control components (such as the screen grid voltage control module or the plate voltage control module) in the modulation link of the transmitter to change the output voltage. The modulation control signal here can be a pulse width modulation signal (PWM, Pulse Width Modulation) or other modulation signals such as a linear modulation signal.

[0027] In practical applications, the voltage control element in each modulation link may include multiple power output units. Each power output unit can output a corresponding voltage according to the modulation control signal. Finally, the voltages output by all the power output units of the voltage control element are superimposed to form the voltage input to the corresponding transmitter electron tube electrode. The modulation control unit 14 can be connected to the power output units in the voltage control element through multiple signal transmission lines to control each power output unit to output a corresponding voltage. Taking the modulation control signal as a PWM signal as an example, by adjusting the duty cycle of the PWM signal, the output voltage of the power output unit can be changed. The larger the duty cycle, the larger the output voltage of the power output unit, and the smaller the duty cycle, the smaller the output voltage of the power output unit. Generally speaking, the voltage control element of a transmitter capable of outputting higher power may include more power output units. The transmitter control system provided by the present disclosure can pre-determine the corresponding modulation control signal and the number of corresponding signal transmission lines according to the output power of the transmitter to be controlled and the number of power output units. In a possible implementation manner, the signal transmission line between the modulation control unit 14 and the corresponding voltage control element in the modulation link can use optical signal propagation, and its transmission medium can be an optical fiber.

[0028] It should be noted that different transmitters may adopt different modulation methods, and for different modulation methods, the electrodes of the transmitter electron tube that need to control the voltage are also different. For example, in the anode modulation of amplitude modulation (AM), the grid of the electron tube can receive the input carrier signal; the modulation signal (i.e., the information signal to be transmitted) can be loaded onto the anode of the electron tube, and the output voltage of the electron tube is changed by the change of the anode voltage, so as to generate a corresponding amplitude-modulated wave at the antenna end of the transmitter, and finally complete 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 stability of the anode current.

[0029] In another embodiment provided by the present disclosure, as Figure 1 shown, the tuning module 2 includes: a tuning control unit 21 and a tuning link 22; 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; The tuning link 22 is connected to the tuner of the transmitter, and the tuning link 22 is configured to tune the carrier signal by configuring the electrical parameters of the tuner of the transmitter according to the tuning control signal.

[0030] In an embodiment of the present disclosure, the tuning link 22 can control the tuner of the transmitter to match the transmit power and the transmit network, achieve precise setting of the operating frequency, optimize the resonant characteristics of the circuit, and make the impedance characteristics of the circuit reach the optimal state, so as to ensure that the signal can efficiently pass through the entire circuit.

[0031] 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 realizing the tuning of the transmitter.

[0032] It should be noted that the number of tuners of different transmitters is determined by the transmitter power or other factors. The number of tuning links provided in the present disclosure can be determined according to the number of tuners of the transmitter, and each tuning link can correspond to one tuner.

[0033] In another embodiment provided by the present disclosure, as Figure 2 shown, the tuning link 22 includes: a driver 221, an encoder 222, and a servo motor 223; The driver 221 is configured to receive the tuning control signal and convert the tuning control signal into a servo motor 223 control signal; The encoder 222 is configured to transmit the servo motor 223 control signal to the servo motor 223 and collect the operation information of the servo motor 223 and send it to the driver 221; The servo motor 223 is configured to operate according to the servo motor 223 control signal, driving the electrical parameters of the electrical components in the tuner of the transmitter to change.

[0034] In an embodiment of the present disclosure, the driver 221 can analyze the received tuning control signal, and can determine the electrical parameters that need to be set for the tuner of the transmitter according to the tuning control signal, and further determine the rotation position of the servo motor 223 that can make the tuner reach such electrical parameters according to the electrical parameters, and finally issue a servo motor 223 control signal.

[0035] The driver 221 can control the encoder 222 by sending control signals. In the present disclosure, the encoder 222 can transmit the servo motor 223 control signal to the servo motor 223. The servo motor 223 can rotate to a corresponding position according to the servo motor 223 control signal to drive the electrical components inside the tuner and change its capacitance or inductance value. The encoder 222 may further include an optical encoder 222, and the optical encoder 222 may include a light source, a code disk, and a photosensor. The code disk can be mounted on the rotating shaft of the servo motor 223, and multiple concentric grating code tracks are arranged on the code disk. The photosensor can receive the light emitted by the opposite light source through the grating on the code disk. When the servo motor 223 rotates, it will drive the code disk to rotate. During the rotation of the code disk, the light source will be blocked. The photosensor can generate corresponding signals according to the sensed brightness change of the light, so as to record the rotation position and the number of rotations of the servo motor 223 (i.e., the operation information of the servo motor 223). The driver 221 can determine whether the servo motor 223 operates to a specified position according to this operation information, and can correct the operation position of the servo motor 223 according to the operation information to achieve high-precision closed-loop control.

[0036] The tuner of the transmitter can be an LC tuning device, which can include multiple variable electrical components inside (for example, varactor diodes, vacuum variable capacitors, adjustable inductors, relay switching capacitor banks, etc.). The servo motor can drive these variable electrical components to perform mechanical movements, thereby changing their capacitance and inductance values, and further achieving impedance matching, frequency selection, and filtering.

[0037] In another embodiment provided by the present disclosure, as Figure 3 shown, the sampling protection module 3 includes: a signal sampling unit 31, a first filtering unit 32, and a first signal conversion unit 33; The signal sampling unit 31 is connected to the electron tube of the transmitter and is used for sampling the electrical signals of each pole of the electron tube of the transmitter; The first filtering unit 32 is used for filtering the electrical signals sampled by the signal sampling unit 31 and then outputting them to the first signal conversion unit 33; The first signal conversion unit 33 is used for performing digital-to-analog conversion on the electrical signals and sending them to the control module 1; The control module 1 is used for obtaining a protection signal according to the electrical signals by using a preset judgment method, and controlling the on-off of the electron tube of the transmitter according to the protection signal.

[0038] In the embodiments of the present disclosure, the signal sampling unit 31 respectively acquires the electrical signals of each electrode of the transmitter electron. For example, the voltage and current of the cathode of the electron tube, the voltage and current of the grid of the electron tube, the voltage and current of the screen grid of the electron tube, and the voltage and current of the suppressor grid of the electron tube, etc. The control module 1 can obtain these parameters from the sampling protection module 3, and based on these parameters, determine whether the working state of the electron tube is normal through a pre-determined judgment method, thereby generating a protection signal to control the on / off of the electron tube of the transmitter, realizing the protection of the electron tube of the transmitter.

[0039] The on / off of the electron tube of the transmitter here can be to control the shutdown of the transmitter by sending a control signal through the instruction response unit 12, or switch devices can be set at each electrode of the electron tube, and through the direct control of these switch devices, rapid power-off protection for the electron tube can be achieved.

[0040] The first filtering unit 32 can be a filter that can filter out the noise interference in the signal; the first signal conversion unit 33 can be an analog-to-digital converter that can convert the analog signal into a digital signal, and it can convert the analog quantity of the acquired electrical signal into a digital signal that can be recognized by the control module 1.

[0041] In another embodiment provided by the present disclosure, the control module 1 is configured to compare the electrical signal with a preset first threshold, and generate a protection signal when the electrical signal is greater than the preset first threshold; and / or Determine the change rate of the electrical signal according to the correspondence 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.

[0042] In the embodiments of the present disclosure, the main body executing the above judgment process can be the main control unit in the control module, or an execution unit specifically set with functions such as calculation and judgment.

[0043] The protection signal generation process provided by the present disclosure can be executed as Figure 4 the flowchart shown.

[0044] S401. Sampling of the analog quantity of the electrical signal. The signal sampling unit 31 can respectively acquire the electrical signals of each electrode of the transmitter electron. The electrical signals here can be the voltage and current of the cathode of the electron tube, the voltage and current of the grid of the electron tube, the voltage and current of the screen grid of the electron tube, and the voltage and current of the suppressor grid of the electron tube, etc., and transmit these electrical signals to the first filtering unit.

[0045] S402. Filtering of the electrical signal. The first filtering unit 32 can filter out the noise interference in the input electrical signal to improve the accuracy of the sampling result.

[0046] S403. Electrical signal conversion. The first signal conversion unit 33 can convert the analog electrical signal into a digital signal and output it to the control module.

[0047] S404. Judgment based on the electrical signal value and the first threshold. In the present disclosure, a threshold (i.e., the first threshold) can be determined in advance for each type of sampled electrical signal. The first threshold can be the critical value of the electrical signal that can ensure the normal operation of the corresponding transmitter. If it operates above this value, it may cause device damage or reduced lifespan. The first threshold corresponding to each type of electrical signal can be stored in the control module 1 in advance. When the value of the sampled electrical signal is greater than the first threshold, it indicates that the transmitter is in an abnormal state, and a corresponding protection signal can be output according to the judgment result.

[0048] S405. Determine the electrical signal change rate. In the present disclosure, the change rate of the electrical signal can also be determined according to the ratio of the electrical signal to time.

[0049] S406. Judgment based on the change rate value and the second threshold. Compare the pre-determined second threshold with the change rate of the electrical signal. When the change rate of the electrical signal is greater than the second threshold, it indicates that the current transmitter may be in an abnormal operating state, and the control module 1 can output a corresponding protection signal according to the judgment result.

[0050] In another embodiment provided by the present disclosure, as Figure 1 shown, it further 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; As Figure 5 shown, the feedback monitoring module 4 includes: a coupling unit 41 and two signal acquisition links 42; The coupling unit 41 is respectively connected to the output end of the electron tube of the transmitter and the antenna of the transmitter, 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; The signal acquisition link 42 is used to process the input signal and output the obtained incident electrical signal and reflected electrical signal to the control module 1; The control module 1 is used to determine the current standing wave ratio of the transmitter according to the incident electrical signal and the reflected electrical signal, and adjust the transmission tuning control signal according to the standing wave ratio.

[0051] In the embodiment of the present disclosure, the standing wave ratio can measure the impedance matching degree in the transmitter. When the electron tube sends a radio frequency signal to the antenna end, this signal is the incident electrical signal; if the impedance at the antenna end does not match the characteristic impedance of the electron tube, a part of the signal will be reflected back to form a reflected electrical signal.

[0052] In the feedback monitoring module 4 provided by the present disclosure, the coupling unit 41 can be a directional coupler, which can only couple signals propagating in a specific direction, so as to separate the electrical signals in two directions (i.e., the incident electrical signal and the reflected electrical signal), and output the two separated signals to two signal acquisition links 42 respectively. After being processed by the signal acquisition link 42, signals that can be recognized by the control module 1 are obtained. Further, the control module 1 calculates the voltage standing wave ratio based on the voltage values of these two signals, and the calculation formula can be as shown in the following formula (1).

[0053] (1) In the above formula (1), is the voltage standing wave ratio (VSWR - Voltage Standing Wave Ratio); is the reflection coefficient, where, is the voltage value of the reflected electrical signal, is the voltage value of the incident electrical signal.

[0054] The closer the value of is to 1, the better the impedance matching degree in the transmitter; when 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 problems 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 and change the value of

[0055] In another embodiment provided by the present disclosure, as shown in Figure 5 , 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; The attenuation unit 421 is used to attenuate the input signal; The second filtering unit 422 is used to filter the input signal according to a preset frequency; The gain unit 423 is used to amplify the input signal; The second signal conversion unit 424 is used to perform analog-to-digital conversion on the input signal.

[0056] 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.

[0057] The second filtering unit 422 can suppress redundant frequency components, thereby filtering out the noise in the signal and ensuring the purity of the acquired signal.

[0058] The gain unit 423 can be a low-noise amplifier, which can amplify the signal according to the set gain, increase the signal amplitude, and introduce no new noise.

[0059] The second signal conversion unit 424 can be an analog-to-digital conversion circuit that converts the acquired analog signal quantity into a digital signal that can be recognized by the control module 1.

[0060] In another embodiment provided by the present disclosure, the signal sampling unit 31 is further respectively connected to the carrier control unit 13 and the modulation control unit 14; 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 through the first filtering unit 32 and the first signal conversion unit 33; The main control unit 11 is configured to determine the working states of the carrier control unit 13 and the modulation control unit 14 according to the electrical signals, and send power control instructions to the corresponding units to adjust the working states of the corresponding units.

[0061] In the embodiment of the present disclosure, the signal sampling unit 31 can also collect the electrical signal values when the carrier control unit 13 and the modulation control unit 14 are working. The main control unit 11 can determine the working states of the corresponding units according to the values of the electrical signals, and can generate corresponding power control instructions, and send them to the corresponding carrier control unit 13 or modulation control unit 14 to adjust the power of the corresponding units to work, so as to protect the corresponding units.

[0062] In another embodiment provided by the present disclosure, as Figure 1 shown, the control module 1 further includes: a switch 15; The switch 15 is configured to implement data forwarding between the main control unit 11 and the instruction response unit 12; and implement data forwarding between the tuning module 2 and the main control unit 11.

[0063] In the embodiment of the present disclosure, the switch can be a device for network communication, which can 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 implement the forwarding of data and instructions.

[0064] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments of the present disclosure can be implemented by hardware or by means of software plus a necessary general hardware platform. Based on such an 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 (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present disclosure.

[0065] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred embodiment, and the modules or processes in the drawings are not necessarily essential for implementing the present disclosure.

[0066] Those skilled in the art can understand that the modules in the device in the embodiments can be distributed in the device in the embodiments according to the description of the embodiments, or can be correspondingly changed and located in one or more devices different from the present embodiments. The modules of the above embodiments can be combined into one module, or further split into multiple sub-modules.

[0067] The serial numbers of the above embodiments of the present disclosure are only for description and do not represent the superiority or inferiority of the embodiments.

[0068] Obviously, those skilled in the art can 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 equivalent technologies, the present disclosure also intends to include these changes and modifications.

Claims

1. A transmitter control system, characterized in that, 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 perform signal tuning 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-off of the electron tube of the transmitter according to the sampling signal.

2. The system according to claim 1, characterized in that The control module includes: a main control unit, an instruction response unit, a carrier control unit, and a modulation control unit; The main control unit is respectively connected to the instruction response unit, the carrier control unit, and the modulation control unit; The instruction response unit is used to receive the control instruction sent by the main control unit, perform digital quantity conversion on the control instruction, 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 used 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, determine the working parameters of the modulation link of the corresponding transmitter according to 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 used 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 the electrical parameters of the tuner of the transmitter according to the tuning control signal to tune the carrier signal.

4. The system according to claim 3, wherein, The tuning link includes: a driver, an encoder, and a servo motor; The driver is used 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 tuner of the transmitter 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 used to filter the electrical signals sampled by the signal sampling unit and output them to the first signal conversion unit; The first signal conversion unit is used to perform digital-to-analog conversion on the electrical signals and send them to the control module; The control module is used to obtain a protection signal according to the electrical signal by using a preset judgment method, and control the on-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 used to compare the electrical signal with a preset first threshold, and generate a protection signal when the electrical signal is greater than the preset first threshold; and / or Determine the change rate of the electrical signal according to 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, characterized in that, It further includes a feedback monitoring module; the feedback monitoring module is used to acquire 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 respectively connected to the output end of the electron tube of the transmitter and the antenna of the transmitter, 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 obtained incident electrical signal and reflected electrical signal 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 adjust the transmission 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 amplify 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 also respectively connected to the carrier control unit and the modulation control unit; The signal sampling unit is also used 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 through the first filtering unit and the first signal conversion unit; The main control unit is used to determine the working states of the carrier control unit and the modulation control unit according to the electrical signals, and send power control instructions to the corresponding units to adjust the working states of the corresponding units.

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

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