Method for automatically setting working frequency based on field radio frequency environment

Abstract

The invention discloses a method for automatically setting a working frequency based on a field radio frequency environment, which relates to the technical field of wireless communication, and comprises the following specific steps of: acquiring field radio frequency environment data in real time through a wireless frequency data acquisition module, and storing the field radio frequency environment data in a database; the data processing module screens non-interference frequency points based on third-order intermodulation interference compatibility calculation, the working frequency of the receiver and the working frequency of the transmitter are dynamically adjusted through the equipment control module, and the database, the data processing module and the equipment control module cooperate to achieve automatic frequency switching. A receiver in the method is provided with a standby receiving sub-module, when it is detected that a current frequency point is interfered, the current frequency point is automatically switched to a standby frequency point, stable operation of a system is ensured, the transmitter synchronizes the frequency with the receiver through a communication protocol in a speaking state, signal transmission is stopped in a mute state, environment interference can be monitored in real time, manual intervention is not needed, and the method is suitable for popularization and application. Manual frequent manual operation for frequency adjustment is avoided, and the anti-interference capability of a wireless communication system is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a method for automatically setting an operating frequency based on an on-site radio frequency environment. Background Art

[0002] With the development of wireless communication technology, its application scope continues to expand, and its applications are becoming increasingly significant. However, wireless communication technology is susceptible to various factors, including the social environment and natural factors. Therefore, since its inception, wireless communication has been accompanied by the problem of communication interference resistance. In wireless communication, external interference is generally categorized as co-frequency interference, out-of-band interference, intermodulation interference, and blocking interference. In the professional wireless microphone and wireless conferencing system industries, the impact of interference is even more significant. Signals at the same frequency as the operating frequency of other wireless transmitting instruments, equipment, microphones, home appliances, and base stations can hinder the transmission of wireless microphone signals. This interference can enter the receiver through the antenna, preventing the wireless microphone's signal from being properly received.

[0003] The existing method to solve the above interference is to find and set an interference-free operating frequency. However, this method requires professional technicians to operate and professional instruments to assist in judgment, which is time-consuming and labor-intensive. In addition, most wireless devices now use technologies such as broadband and frequency hopping, which requires frequent manual and instrument-assisted setting of an interference-free operating frequency, greatly reducing practical effectiveness.

[0004] Based on this, a method for automatically setting the operating frequency based on the on-site radio frequency environment is now provided, which can eliminate the disadvantages of the existing technical solutions. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for automatically setting the operating frequency based on the on-site radio frequency environment, so as to solve the problem that the existing anti-interference method in the background art requires multiple manual and machine frequency settings, which is time-consuming and labor-intensive.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for automatically setting an operating frequency based on an on-site radio frequency environment is applied to a system for automatically setting an operating frequency based on an on-site radio frequency environment. The system is configured as a distributed architecture and includes: Wireless frequency data acquisition module, used to collect on-site radio frequency data in real time; Database, used to store collected frequency data and interference-free frequency calculation results; A data processing module is used to determine the interference-free frequency point based on the collected data; Equipment control module, used to switch the operating frequency to a frequency without interference; The method specifically comprises the following steps: S1. Use the wireless frequency data acquisition module to collect the on-site radio frequency environment in real time and obtain the signal data of each frequency point; S2. storing the collected on-site radio frequency signal data into a database; S3. Analyze the signal data in the database through the data processing module, and select the interference-free working frequency points based on the third-order intermodulation interference compatibility calculation; S4. Dynamically adjust the operating frequencies of the receiver and transmitter to a non-interference frequency point based on the calculation result of the data processing module through the device control module, where the non-interference frequency point is set to the frequency point with the minimum signal strength; S5. When the receiver is working normally, it continuously scans the ambient RF signals and updates the database. When it detects that the current working frequency is interfered with, it automatically switches to the backup frequency without interference.

[0007] Preferably, the receiver comprises: A first antenna module, configured to receive radio frequency signals; A receiver module for demodulating RF signals and outputting signal strength data; A first microprocessor unit is used to control the frequency locking and scanning of the receiver module and analyze the signal strength data to select a frequency point without interference; A first display module is used to display the working status and frequency information of the receiver; A first audio processing module, configured to process the demodulated audio signal; The first control data transceiver module is used to communicate with the transmitter.

[0008] Preferably, the transmitter includes: A second antenna module is used to send and receive control instructions; A second audio processing module, configured to process an input audio signal; a second microprocessor unit for controlling the operating frequency and communication process of the transmitter; The second display module is used to display the working status and frequency information of the transmitter; VCO&PLL module, used to generate and lock the RF signal frequency; RFAMP module, used to amplify radio frequency signals; The second control data transceiver module is used to communicate with the receiver.

[0009] Preferably, the step S3 specifically includes: S31, the data processing module obtains all active frequency points of the current radio frequency environment from the database; S32. Calculate the third-order intermodulation interference frequency for each pair of frequency points to generate a potential interference frequency point set; S33, matching the calculated third-order intermodulation frequency points with the available frequency band of the system to eliminate all frequencies with potential interference; S34. Select a frequency point with the smallest signal strength from the remaining frequency points as an interference-free working frequency point, and store it in a database.

[0010] Preferably, the step S4 specifically includes: S41. The device control module obtains the interference-free operating frequency calculated by the data processing module from the database; S42, sending a frequency adjustment instruction to the receiver through the first control data transceiver module, so that the receiver module locks to a frequency point without interference; S43, sending a frequency synchronization instruction to the transmitter through the second control data transceiver module to control the VCO & PLL module to lock the same interference-free frequency as the receiver; S44. Monitor the interference status of the adjusted frequency in real time. If interference is detected, trigger the recalculation and switching process and repeat steps S3-S4 to reselect the frequency.

[0011] Preferably, the wireless frequency data acquisition module is integrated into the receiver, and the receiver and the wireless frequency data acquisition module realize data interaction through the first control data transceiver module. The first microprocessor unit of the receiver controls the working frequency locking and scanning operation of the receiver module according to the signal data collected by the wireless frequency data acquisition module.

[0012] Preferably, the database, data processing module and device control module are all independently deployed and work in conjunction with the receiver and transmitter through a communication interface.

[0013] Preferably, the transmitter has two states during power-on startup, including a mute state and a speaking state; If the transmitter is in a mute state, the VCO & PLL module in the transmitter is in a state where the circuit is not working, the frequency is not locked, and the signal is not transmitted; If the transmitter is in the speaking state, the second microprocessor unit in the transmitter transmits the application instruction for speaking to the second control data transceiver module, and the second control data transceiver module transmits the application instruction through the second antenna module, and receives the reply instruction of the receiver through the second control data transceiver module, thereby causing the second microprocessor unit to issue an instruction to make the VCO&PLL module in circuit operation and frequency locked.

[0014] Preferably, the judgment criterion for detecting that the current working frequency is interfered with in step S5 is: whether the radio frequency strength of the current receiving frequency exceeds the preset strength value. If it exceeds the preset strength value, the first microprocessor unit determines that the receiving frequency is interfered with, and then replaces the spare interference-free frequency.

[0015] Preferably, the receiver module includes a plurality of main receiving submodules and at least one spare receiving submodule. When the first microprocessor unit detects that the operating frequency point is interfered with, the spare receiving submodule is used to replace the interfered main receiving submodule.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention collects data information, analyzes and calculates interference conditions, and promptly processes interference in the event of interference, thereby ensuring the stability of the system. The operating frequency is calculated based on the third-order intermodulation interference compatibility according to the on-site environment, accurately eliminating potential interference frequencies, ensuring stable and reliable communication quality, and is suitable for complex and changeable radio frequency environments. In addition, the system collects and calculates wireless frequency data in real time, thereby ensuring safe and reliable operation of the system. 2. The present invention collects and analyzes radio frequency environment data in real time, automatically calculates and switches to interference-free frequencies, avoids manual intervention and frequent adjustments, and significantly improves the system's response speed and work efficiency. It monitors the on-site environment in real time under normal operation, making it easy to find an interference-free working frequency. In addition, a backup receiving submodule is provided. When a main receiving submodule fails, the backup receiving submodule can be automatically replaced to ensure the continuous operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the steps of the method of the present invention.

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of step S3 in .

[0019] Figure 3 For the present invention Figure 1 Schematic diagram of step S4 in FIG.

[0020] Figure 4 Schematic diagram of the structure of the system of the present invention.

[0021] Figure 5 Schematic diagram of the structure of the receiver of the present invention.

[0022] Figure 6 Schematic diagram of the structure of the transmitter of the present invention.

[0023] Notes on the accompanying drawings: wireless frequency data acquisition module 10, database 20, data processing module 30, device control module 40, receiver 50, first antenna module 51, receiver module 52, first microprocessor unit 53, first display module 54, first audio processing module 55, first control data transceiver module 56, transmitter 60, second antenna module 61, second audio processing module 62, second microprocessor unit 63, second display module 64, VCO&PLL module 65, RFAMP module 66, second control data transceiver module 67. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0025] In this embodiment, if Figures 1-6 As shown, a method for automatically setting an operating frequency based on an on-site radio frequency environment is applied to a system for automatically setting an operating frequency based on an on-site radio frequency environment. The system is configured as a distributed architecture and includes: A radio frequency data acquisition module 10 is used to collect on-site radio frequency data in real time; Database 20, used to store the collected frequency data and the interference-free frequency point calculation results; The data processing module 30 is used to determine the interference-free frequency point based on the collected data, and push the calculated result to the device control module 40; The device control module 40 is used to switch the operating frequency to a non-interference frequency point and send frequency configuration instructions to the receiver 50 and the transmitter 60; Specifically, the wireless frequency data acquisition module 10 is integrated into the receiver 50. The receiver 50 and the wireless frequency data acquisition module 10 realize data exchange through the first control data transceiver module 56. The first microprocessor unit 53 of the receiver 50 controls the working frequency locking and scanning operations of the receiver module 52 according to the signal data collected by the wireless frequency data acquisition module 10. The first control data transceiver module 56 interacts with the first microprocessor unit 53 via the SPI bus to realize real-time transmission of frequency adjustment instructions. The database 20, the data processing module 30 and the device control module 40 are all independently deployed and work in coordination with the receiver 50 and the transmitter 60 through the communication interface. Specifically, the database 20 can be deployed in the cloud or a local server to centrally store RF environment data, support multi-device sharing and real-time updates, the data processing module 30 runs independently on a computing node (such as an edge server), is responsible for third-order intermodulation calculation and interference analysis, and reduces the computing power burden of the receiver 50 and the transmitter 60, and the device control module 40 can be deployed in a gateway or a central controller to uniformly manage frequency configuration instructions and coordinate the dynamic adjustment of multiple receivers 50 and transmitters 60. The modules interact with each other through standard protocols such as SPI and I2C. The method specifically comprises the following steps: S1. Use the wireless frequency data acquisition module 10 to collect the on-site radio frequency environment in real time and obtain signal data of each frequency point; S2, storing the collected on-site radio frequency signal data into the database 20; S3, analyzing the signal data in the database 20 through the data processing module 30, and screening the interference-free working frequency points based on the third-order intermodulation interference compatibility calculation; Specifically, if Figure 2 As shown, step S3 includes: S31, the data processing module 30 obtains all active frequency points of the current radio frequency environment from the database 20; S32. Calculate the third-order intermodulation interference frequency for each pair of frequency points to generate a potential interference frequency point set; S33, matching the calculated third-order intermodulation frequency points with the available frequency band of the system to eliminate all frequencies with potential interference; S34, selecting a frequency with the smallest signal strength from the remaining frequency points as the interference-free working frequency point, and storing it in the database 20; Specifically, third-order intermodulation is a common nonlinear interference phenomenon in wireless communication systems. When two or more frequency signals pass through nonlinear devices (such as amplifiers and mixers), new interfering frequency components will be generated. The above new frequencies may fall within the system operating frequency band, resulting in a decrease in communication quality. In this step, it is assumed that the input signal is two frequencies. 、 , after passing through the nonlinear system, the output signal contains the following main components: fundamental frequency 、 , second-order intermodulation , third-order intermodulation (key interference source) and ; Specifically, the data processing module 30 obtains all active frequencies in the current environment such as 、 、 etc., calculate the potential IM3 frequency points, for each pair of frequency points Calculate the third-order intermodulation interference frequency , , generate a set of potential interference frequencies, exclude all frequencies that overlap with IM3 products, and ensure that the selected operating frequency meets the following requirements: ,recalculate as the environment changes. If the calculated result overlaps with the device's operating frequency band, it will be marked as an "interference frequency point"; S4. Based on the calculation result of the data processing module 30, the device control module 40 dynamically adjusts the operating frequencies of the receiver 50 and the transmitter 60 to a non-interference frequency point, where the non-interference frequency point is set to a frequency point with the minimum signal strength; Specifically, selecting the frequency with the lowest signal strength can ensure that the frequency is not occupied by other devices, thereby reducing the risk of co-channel interference, such as Figure 3 As shown, step S4 includes: S41: The device control module 40 obtains the interference-free operating frequency points calculated by the data processing module 30 from the database 20 and selects the optimal frequency point according to the following rules: Prioritization: Select the frequency with the lowest signal strength (RSSI). If the signal strengths of multiple frequencies are similar, prioritize the frequency that is away from known strong interference sources (such as base stations and Wi-Fi channels). Third-order intermodulation verification: Ensure that the selected frequency point does not interfere with other active frequencies in the environment 、 、 The third-order intermodulation interference is generated or Does not fall into the working frequency band; Historical stability check: query the historical interference records of the frequency point in database 20, and give priority to the long-term stable frequency point; S42. Send a frequency adjustment instruction to the receiver 50 via the first control data transceiver module 56, causing the receiver module 52 to lock to an interference-free frequency. The frequency adjustment instruction includes the target frequency and the transmit power limit. The first microprocessor unit 53 of the receiver 50 parses the instruction and adjusts the phase-locked loop (PLL) of the receiver module 52 via the PLL control pin to lock to the target frequency. The first display module 54 updates the current operating frequency and status (e.g., "Switched to 610.25 MHz"). The receiver module 52 demodulates the new frequency signal and feeds back the signal strength to the first microprocessor unit 53 in real time via the RSSI pin. If the signal strength exceeds a threshold, assuming the threshold is set to -80 dBm, the signal strength is immediately reported to the device control module 40 to trigger a reselection process. S43. Send a frequency synchronization instruction to the transmitter 60 through the second control data transceiver module 67, control the VCO & PLL module 65 to lock the same interference-free frequency as the receiver 50. If multiple transmitters apply for the same frequency, they are allocated according to priority (such as device ID). The second microprocessor unit 63 of the transmitter 60 controls the VCO & PLL module 65 to generate the target frequency and amplifies the signal through the RFAMP module 66. The second display module 64 displays "Frequency synchronized: 610.25 MHz". The transmitter 60 sends a confirmation signal to the receiver 50 through the second antenna module 61 to ensure that the frequencies of the transmitter and receiver are consistent. S44: Real-time monitoring of the interference status of the adjusted frequency. If interference is detected, the recalculation and switching process is triggered, and steps S3-S4 are repeated to reselect the frequency. The receiver 50 continuously scans the environment and detects changes in the signal strength of the current operating frequency. The data processing module 30 periodically updates the interference map in the database 20. If the RSSI of the current frequency exceeds the threshold for 3 seconds, it is determined to be interfered with. The device control module 40 immediately calls the backup frequency from the database 20 and repeats steps S41-S43 to complete the switching. The switching process must be completed within 100 milliseconds to ensure uninterrupted audio transmission. S5. When the receiver 50 is working normally, it continuously scans the ambient radio frequency signal and updates the database 20. When it detects that the current working frequency is interfered with, it automatically switches to an alternative non-interference frequency. Specifically, the above-mentioned judgment standard for detecting interference at the current operating frequency is: whether the radio frequency strength of the current receiving frequency exceeds a preset strength value. If it exceeds the preset strength value, the first microprocessor unit 53 determines that the receiving frequency is interfered with and then replaces the backup non-interference frequency. According to industry standards, the preset strength value can be set to -80dBm. Based on the IEEE 802.11 protocol's recommendation on wireless signal interference thresholds, the preset strength value can be adjusted according to actual environment. Among them Figure 4 and Figure 5 As shown, the receiver 50 includes: The first antenna module 51 is used to receive radio frequency signals. It is responsible for receiving radio frequency signals in the environment, including target signals and interference signals. It adopts a wideband design to cover the device operating frequency band. It can be configured with multi-antenna diversity reception to enhance anti-interference capabilities. The antenna distributor evenly distributes the signals to the main receiving submodule and the backup receiving submodule; The receiver module 52 is used to demodulate the RF signal and output signal strength data. The standby receiving submodule scans the entire frequency band according to the instructions of the first microprocessor unit 53 and quickly switches the frequency point through the PLL phase-locked loop. The main receiving submodule locks the operating frequency point, demodulates the audio signal in real time, and quantifies the RF signal strength through the RSSI pin and transmits it to the first microprocessor unit 53; The first microprocessor unit 53 is used to control the frequency locking and scanning of the receiver module 52, analyze signal strength data to select a frequency without interference, dynamically configure the locking frequency of the receiver module 52 through the PLL control pin, compare the RSSI values of each frequency point, and select the frequency with the lowest signal strength. When the main receiver sub-module is interfered with, the device control module 40 receives the request information from the transmitter and switches the interfering main receiver sub-module to the backup receiver sub-module to ensure uninterrupted communication; The first display module 54 is used to display the working status and frequency information of the receiver 50. It displays the working status of the receiver 50 in real time, such as the current working frequency, signal strength, and interference warning prompts. It supports touch or key operation and allows manual forced switching of frequency points; The first audio processing module 55 is used to process the demodulated audio signal, perform noise reduction and audio enhancement processing on the baseband signal demodulated by the receiver module 52, analog audio signal or digital audio; The first control data transceiver module 56 is used to communicate with the transmitter 60. It receives the "apply to speak" command from the transmitter 60 through the first antenna module 51 and transmits the command to the first microprocessor unit 53 via the SPI bus. After the first microprocessor unit 53 selects a frequency without interference, it sends the frequency configuration command to the transmitter 60 through this module, realizing two-way communication with the transmitter 60. Among them Figure 4 and Figure 6 As shown, the transmitter 60 includes: The second antenna module 61 is used to send and receive control commands. It adopts a dual-channel design. The control command channel can transmit commands such as "apply to speak" and is isolated from the main RF signal to avoid interference. The main RF channel is used to send modulated audio signals to the receiver 50. The directional design enhances signal transmission efficiency and reduces the impact of environmental interference. The second audio processing module 62 is used to process the input audio signal and perform pre-emphasis, compression, and clipping protection on the audio signal input from the microphone or line. In the silent state, that is, the default state, the audio path is closed and no signal is output. In the speaking state, the audio processing link is started and the baseband signal is output to the VCO & PLL module 65; The second microprocessor unit 63 is used to control the operating frequency and communication process of the transmitter 60. During power-on initialization, the VCO & PLL module 65 is kept off and enters a mute state. When a user key operation is detected, it sends an "apply to speak" command to the second control data transceiver module 67 via the SPI bus. The second microprocessor unit 63 parses the frequency command replied by the receiver 50, configures the VCO & PLL module 65 to lock the target frequency, and monitors the output power of the RFAMP module 66 in real time, dynamically adjusting it to meet regulatory limits. The second display module 64 is used to display the operating status and frequency information of the transmitter 60, and to display the operating status of the transmitter 60 in real time, such as the current operating frequency, status indication, and interference warning prompt, and supports touch or key operation; The VCO & PLL module 65 is used to generate and lock the RF signal frequency. The VCO is a voltage-controlled oscillator used to generate a variable RF carrier (such as the UHF band 470-960 MHz). The PLL is a phase-locked loop used to lock the interference-free frequency point specified by the receiver 50 through the SPI instruction of the second microprocessor unit 63. The frequency deviation accuracy is ≤±1kHz. When muted, the VCO and PLL circuits are completely turned off to eliminate background noise radiation; RFAMP module 66 is used to amplify the RF signal to ensure distortion-free amplification of the modulated signal to meet the purity requirements of the RF signal and dynamically adjust the output power according to the RSSI data fed back by the receiver 50; The second control data transceiver module 67 is used to communicate with the receiver 50, modulate the "apply to speak" command from the second microprocessor unit 63 into a 2.4 GHz signal, transmit it through the second antenna module 61, demodulate the frequency configuration command replied by the receiver 50, and transmit it to the second microprocessor unit 63, thus achieving two-way communication with the transmitter 60; Among them Figure 6 As shown, the transmitter 60 has two states during power-on startup, including a mute state and a speech state; If the transmitter 60 is in a mute state, the VCO & PLL module 65 in the transmitter 60 is in a state where the circuit is not working, the frequency is not locked, and the signal is not transmitted; If the transmitter 60 is in the speaking state, the second microprocessor unit 63 in the transmitter 60 transmits the application instruction for speaking to the second control data transceiver module 67. The second control data transceiver module 67 transmits the application instruction through the second antenna module 61. The second control data transceiver module 67 receives the reply instruction from the receiver 50, which in turn causes the second microprocessor unit 63 to issue an instruction to make the VCO & PLL module 65 in circuit operation and frequency locked. Among them Figure 5 As shown, the receiver module 52 includes multiple main receiving submodules and at least one spare receiving submodule. When the first microprocessor unit 53 detects that the working frequency point is interfered with, the spare receiving submodule is used to replace the interfered main receiving submodule; Specifically, each main receiving submodule includes a PLL frequency synthesizer, a radio frequency front end, and an RSSI detection circuit for locking a specified operating frequency. The hardware structure of the backup receiving submodule is consistent with that of the main receiving submodule, but the operating mode is different. Under normal circumstances, the backup receiving submodule does not lock a fixed frequency, but continuously scans the entire frequency band and selects the frequency with the lowest RSSI as the backup frequency. The master-slave switching execution process includes: the first microprocessor unit 53 notifies the transmitter 60 to suspend signal transmission through the first control data transceiver module 56, locks the PLL of the interfered master module to the clean frequency pre-selected by the backup receiving submodule, the first audio processing module 55 seamlessly switches to the audio stream demodulated at the new frequency to avoid "crackling", synchronously updates the channel status of the first display module 54, and synchronizes the new frequency to the transmitter 60 through the first control data transceiver module 56. After the switching is completed, the original backup receiving submodule immediately becomes the new master receiving submodule, and the first microprocessor unit 53 starts another idle submodule as the new backup receiving submodule; When in use, the workflow of the receiver 50 is: After the receiver 50 is powered on, the first microprocessor unit 53 instructs several main receiving submodules to lock the operating frequency stored when the receiver was last powered off (such as CH1: 620MHz, CH2: 625MHz) through the PLL control pin. The standby receiving submodule immediately starts a full-band scan (470~960MHz) with a step interval of 1MHz. Each frequency point stays for 5ms to detect the RSSI value. The data processing module 30 performs third-order intermodulation calculation on the scanned data to eliminate all frequencies that may cause intermodulation interference. The cleanest frequency point, that is, the frequency point with the lowest RSSI and no intermodulation conflict, is stored in the database 20 as the backup frequency. During the working phase, each main receiving submodule outputs the RSSI pin in real time. The signal strength is compared by the first microprocessor unit 53 with a preset threshold. If the sampling exceeds the threshold for three consecutive times, it is determined to be interfered with. The standby receiving submodule continues to scan in a loop and updates the clean frequency list every 10 seconds to ensure that the standby frequencies in the database 20 are valid in real time. When the main receiving submodule, such as CH2, detects that the threshold is exceeded, it extracts the clean frequency from the database 20, reconfigures the phase-locked loop of CH2 through the PLL control pin, and simultaneously notifies the transmitter 60 to switch to the same frequency by controlling the data transceiver module. If a main receiving submodule has a hardware failure, the first microprocessor unit 53 directly shuts down the module, promotes the standby receiving submodule to the main receiving submodule, and allocates a new standby receiving submodule to continue scanning. The workflow of the transmitter 60 is: After the transmitter 60 is powered on, the second microprocessor unit 63 shuts down the VCO & PLL module 65 and the RFAMP module 66, entering a zero-radiation state. The second display module 64 displays "Standby" and battery information. After the user presses the Speak button, the second microprocessor unit 63 sends an "Apply to Speak" command via the second control data transceiver module 67. The receiver 50 selects an idle frequency from the database 20 and returns the command via the first control data transceiver module 56. The second microprocessor unit 63 configures the VCO & PLL module 65 to lock the frequency and activates the RFAMP module 66. The second audio processing module 62 unmutes the input audio signal, modulates it, and outputs it. If a "Frequency Interference" command from the receiver 50 is detected during transmission, the transmitter immediately switches to the new frequency specified by the receiver 50.

[0026] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for automatically setting an operating frequency based on an on-site radio frequency environment, applied to a system for automatically setting an operating frequency based on an on-site radio frequency environment, the system being configured as a distributed architecture, comprising: A radio frequency data acquisition module (10) is used to collect on-site radio frequency data in real time; A database (20) for storing collected frequency data and interference-free frequency point calculation results; A data processing module (30) is used to determine a non-interference frequency point based on the collected data; A device control module (40) is used to switch the operating frequency to a frequency point without interference; It is characterized in that the method specifically comprises the following steps: S1, collecting the on-site radio frequency environment in real time through the wireless frequency data collection module (10) to obtain signal data of each frequency point; S2, storing the collected on-site radio frequency signal data into a database (20); S3, analyzing the signal data in the database (20) through the data processing module (30), and screening the interference-free working frequency points based on the third-order intermodulation interference compatibility calculation; S4, dynamically adjusting the operating frequencies of the receiver (50) and the transmitter (60) to a non-interference frequency point through the device control module (40) according to the calculation result of the data processing module (30), wherein the non-interference frequency point is set to a frequency point with the minimum signal strength; S5. When the receiver (50) is working normally, it continuously scans the ambient radio frequency signal and updates the database (20). When it is detected that the current working frequency point is interfered with, it automatically switches to a spare non-interference frequency point.

2. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 1, characterized in that: The receiver (50) comprises: A first antenna module (51) for receiving radio frequency signals; A receiver module (52) for demodulating radio frequency signals and outputting signal strength data; A first microprocessor unit (53) is used to control the frequency locking and scanning of the receiver module (52) and analyze signal strength data to select a frequency point without interference; A first display module (54) is used to display the working status and frequency information of the receiver (50); A first audio processing module (55) for processing the demodulated audio signal; The first control data transceiver module (56) is used to communicate with the transmitter (60).

3. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 1, characterized in that: The transmitter (60) comprises: A second antenna module (61) is used to send and receive control instructions; A second audio processing module (62) for processing an input audio signal; A second microprocessor unit (63) is used to control the operating frequency and communication process of the transmitter (60); A second display module (64) is used to display the operating status and frequency information of the transmitter (60); A VCO & PLL module (65), used to generate and lock the frequency of a radio frequency signal; RFAMP module (66), for amplifying radio frequency signals; The second control data transceiver module (67) is used to communicate with the receiver (50).

4. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 1, characterized in that: The step S3 specifically includes: S31, the data processing module (30) obtains all active frequency points of the current radio frequency environment from the database (20); S32. Calculate the third-order intermodulation interference frequency for each pair of frequency points to generate a potential interference frequency point set; S33, matching the calculated third-order intermodulation frequency points with the available frequency band of the system to eliminate all frequencies with potential interference; S34. Select the frequency point with the smallest signal strength from the remaining frequency points as the interference-free working frequency point, and store it in the database (20).

5. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 1, characterized in that: The step S4 specifically includes: S41, the device control module (40) obtains the interference-free operating frequency calculated by the data processing module (30) from the database (20); S42, sending a frequency adjustment instruction to the receiver (50) through the first control data transceiver module (56), so that the receiver module (52) is locked to a frequency point without interference; S43, sending a frequency synchronization instruction to the transmitter (60) through the second control data transceiver module (67), controlling the VCO & PLL module (65) to lock the same interference-free frequency point as the receiver (50); S44. Monitor the interference status of the adjusted frequency in real time. If interference is detected, trigger the recalculation and switching process and repeat steps S3-S4 to reselect the frequency.

6. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 2, characterized in that: The wireless frequency data acquisition module (10) is integrated into the receiver (50), and the receiver (50) and the wireless frequency data acquisition module (10) realize data interaction through the first control data transceiver module (56). The first microprocessor unit (53) of the receiver (50) controls the working frequency locking and scanning operations of the receiver module (52) according to the signal data collected by the wireless frequency data acquisition module (10).

7. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 1, characterized in that: The database (20), data processing module (30) and device control module (40) are all independently deployed and work in conjunction with the receiver (50) and transmitter (60) via a communication interface.

8. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 3, characterized in that: The transmitter (60) is provided with two states during power-on startup, including a mute state and a speaking state; If the transmitter (60) is in a silent state, the VCO & PLL module (65) in the transmitter (60) is in a state where the circuit is not working, the frequency is not locked, and the signal is not transmitted; If the transmitter (60) is in a speaking state, the second microprocessor unit (63) in the transmitter (60) transmits an application instruction for speaking to the second control data transceiver module (67), and the second control data transceiver module (67) transmits the application instruction through the second antenna module (61), and receives a reply instruction from the receiver (50) through the second control data transceiver module (67), thereby causing the second microprocessor unit (63) to issue an instruction, so that the VCO&PLL module (65) is in a circuit working state and the frequency is locked.

9. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 2, characterized in that: The judgment criterion for detecting that the current working frequency point is interfered with in step S5 is: whether the radio frequency intensity of the current receiving frequency exceeds a preset intensity value; if it exceeds the preset intensity value, the first microprocessor unit (53) determines that the receiving frequency point is interfered with, and then replaces the standby non-interference frequency point.

10. The method for automatically setting the operating frequency based on the on-site radio frequency environment according to claim 9, characterized in that: The receiver module (52) comprises a plurality of main receiving submodules and at least one spare receiving submodule. When the first microprocessor unit (53) detects that the operating frequency point is interfered with, the spare receiving submodule is used to replace the interfered main receiving submodule.

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