Wireless microphone frequency management method and system

Abstract

The invention discloses a wireless microphone frequency management method and system. The wireless microphone frequency management system comprises a transmitting end and a receiving end. The transmitting end is used to receive sound waves, convert the sound waves into electrical signals and convert the electrical signals into radio frequency signals for transmission. The receiving end is used to receive the radio frequency signals. The receiving end comprises an RX1 channel and an RX2 channel. The transmitting end comprises corresponding TX1 channels and TX2 channels. The method comprises the following steps: Step 1, setting a frequency band to be used by the device; Step 2, the receiving end receives the radio frequency signal and performs full-band signal level detection; Step 3, screening out a plurality of high-quality frequency points and a plurality of available frequency points to form an available frequency band; Step 4, initially setting the RX1 channel and the TX1 channel as standard channels, and initially setting the RX2 channel and the TX2 channel as spare channels; Step 5, detecting whether the TX2 channel and the frequency points currently used by the channel are interfered with or the signal quality is deteriorated; and Step 6 is executed to perform a frequency point shift operation.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless microphones, and in particular to a method and system for managing the frequency of wireless microphones. Background Art

[0002] The core of a wireless microphone is the microphone element, which converts sound waves into electrical signals. The transmitter in a wireless microphone receives the electrical signals generated by the microphone element and converts them into radio frequency (RF) signals. RF signals contain audio information and are radio waves, usually in the UHF (ultra-high frequency) range, which can provide good coverage and audio quality. At the other end, the receiver captures the radio waves and converts them back into electrical signals. The electrical signal is then sent to the audio mixer, where it can be further processed, mixed, and finally sent to the sound system for amplification. U-band wireless microphones are widely used because of their stable and high-quality transmitted audio signals, strong anti-interference ability, and the ability to have more effective compatible frequencies. However, U-band wireless microphones are often plagued by the problem of co-frequency crosstalk. When external interference is in the same frequency as the microphone, it will cause the receiving end to receive useless noise interference or crosstalk audio. The existing frequency management system uses automatic frequency hopping technology. The usual frequency hopping will cause interruption of the modulation signal and interference to the frequency after the hopping. Although the anti-interference performance is enhanced by the cumbersome program design of packaging, sending, unpacking, feedback reception verification and reply, it is necessary to manage and track the heartbeat packets in the later stage of transmission, and it is also necessary to consider problems such as packet loss, which is more troublesome and inconvenient to use. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a wireless microphone frequency management method and system that can complete accurate frequency management and subsequent detection by only transmitting but not receiving, without the need for post-transmission management and tracking, without considering packet loss, and without the need for two-way communication.

[0004] The wireless microphone frequency management method according to the first aspect of the present invention is applied to a wireless microphone frequency management system, wherein the wireless microphone frequency management system comprises a transmitting end and a receiving end, wherein the transmitting end is used to receive sound waves, convert the sound waves into electrical signals and convert the electrical signals into radio frequency signals for transmission, and the receiving end is used to receive the radio frequency signals, wherein the receiving end comprises an RX1 channel and an RX2 channel, and the transmitting end comprises corresponding TX1 channels and TX2 channels, and comprises the steps of:

[0005] Step 1, set the frequency band to be used by this device;

[0006] Step 2: The receiving end receives the radio frequency signal, performs full-band signal level detection on the received radio frequency signal in the frequency band to be used, and performs value assignment, recording and saving operations on all detected frequency points;

[0007] Step 3, screening out multiple high-quality frequency points and multiple available frequency points to form an available frequency band;

[0008] Step 4: Initially set the RX1 channel and TX1 channel as standard channels, and initially set the RX2 channel and TX2 channel as standby channels;

[0009] Step 5, check whether the TX2 channel and its currently used frequency point are interfered or the signal quality is deteriorated;

[0010] If not, return to step 2;

[0011] If yes, go to step 6;

[0012] Step 6, perform a frequency point shift operation to change the frequency points of the TX2 channel and the RX2 channel to real-time preferred frequency points (the preferred frequency point can be shifted to any optimal, nearest, interference-free or clean frequency point in the available frequency band);

[0013] Step 7, check whether the signal of TX1 channel is abnormal;

[0014] If not, return to step 5;

[0015] If yes, go to step 8;

[0016] Step 8, select TX2 channel as the standard channel for signal output, and convert TX1 channel and RX1 channel to standby channels and mark them as value assignments;

[0017] Step 9, check whether the TX1 channel and its currently used frequency point are interfered or the signal quality is deteriorated;

[0018] If not, return to step 5;

[0019] If yes, go to step 10;

[0020] Step 10, perform frequency point shift operation to change the frequency points of TX1 channel and RX1 channel to real-time optimal frequency points;

[0021] Step 11, check whether the signal of TX2 channel is abnormal;

[0022] If not, return to step 5;

[0023] If yes, go to step 12;

[0024] Step 12, select TX1 channel as the standard channel for signal output, immediately convert TX2 channel and RX2 channel to spare channels and mark them as value, and return to step 5.

[0025] According to the wireless microphone frequency management system of the second aspect of the embodiment of the present invention, the above-mentioned wireless microphone frequency management method is applied, the transmitting end includes a 2.4G transmitting channel TX3, the receiving end includes a microcontroller 1 and 2.4G receiving channel RX3, RX4 units, signal level detection circuits, noise level detection circuits and channel selection control circuits respectively electrically connected to the microcontroller 1, the RX1 channel and the RX2 channel are respectively electrically connected to the microcontroller 1, the RX1 channel includes a radio frequency amplification circuit 1, a modulation and demodulation circuit 1, a signal separation circuit 1, an audio restoration circuit 1 and an audio channel 1, the RX4 unit is used to receive the radio frequency signal, the radio frequency signal is amplified by the radio frequency amplification circuit 1, modulated and demodulated by the modulation and demodulation circuit 1, and then enters the signal separation circuit 1, the separated signal is restored by the audio restoration circuit 1 to obtain the audio signal 1, and the audio signal 1 enters the channel selection control circuit; the RX2 channel includes a radio frequency amplifier circuit 1, a modulation and demodulation circuit 1, a signal separation circuit 1, an audio restoration circuit 1 and an audio channel 1, and the RX4 unit is used to receive the radio frequency signal. A large circuit 2, a modulation and demodulation circuit 2, a signal separation circuit 2, an audio restoration circuit 2 and an audio channel 2. The radio frequency signal is amplified by the radio frequency amplifier circuit 2, modulated and demodulated by the modulation and demodulation circuit 2, and then enters the signal separation circuit 2. The separated signal is restored by the audio restoration circuit 2 to obtain the audio signal 2, and the audio signal 2 enters the channel selection control circuit; and the signal level detection circuit is electrically connected to the modulation and demodulation circuit 1 and the modulation and demodulation circuit 2 respectively to screen out high-quality frequency points and available frequency points; the noise level detection circuit is electrically connected to the audio restoration circuit 1 and the audio restoration circuit 2 respectively to detect noise interference and audio quality; the channel selection control circuit is electrically connected to the audio channel 1 and the audio channel 2 respectively. When it is detected that there is noise interference on the standard use channel / spare channel or the audio signal quality deteriorates, the channel selection control circuit switches the signal output from the standard use channel / spare channel to the spare channel / standard use channel.

[0026] The wireless microphone frequency management method and system according to the embodiment of the present invention have at least the following beneficial effects: firstly, the received radio frequency signal is subjected to full-band signal level detection to screen out high-quality frequency points and available frequency points, and the standard channel and the spare channel are set. After the currently used standard channel is interfered, the frequency point offset operation is performed to change the frequency point of the spare channel to the real-time preferred frequency point. Then, if the signal of the currently used standard channel is detected to be abnormal, the spare channel is selected as the standard channel for signal output, that is, the previously used standard channel is converted to the spare channel, and the output channel of the signal is switched immediately to ensure that the transmission content remains unchanged and the transmission quality remains unchanged, and at the same time, the frequency point of the spare channel is offset to the interference-free frequency band to ensure the quality of the transmission content, which can ensure that the receiving channel is selected from the standard channel and the spare channel at any time, and the switching output signal is a high-quality receiving signal. Compared with the traditional frequency hopping that requires two-way communication, the system has better timeliness, is less susceptible to interference, and does not need to change any parameters of the currently used channel when performing the channel switching operation, truly achieving only sending and not receiving, and does not require post-transmission management and tracking, does not need to consider the trouble of packet loss, and can complete accurate frequency management and subsequent detection without two-way communication.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings;

[0029] Figure 1 It is the circuit block diagram of the receiving end;

[0030] Figure 2 It is the block diagram of the transmitter circuit;

[0031] Figure 3 is a circuit schematic diagram of the microcontroller 1;

[0032] Figure 4 This is the schematic diagram of the noise level detection circuit;

[0033] Figure 5 This is the schematic diagram of the channel selection control circuit;

[0034] Figure 6 is the schematic diagram of the pilot signal detection circuit;

[0035] Figure 7 This is the circuit schematic diagram of the 2.4G channel. DETAILED DESCRIPTION

[0036] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] Reference Figures 1 to 7 The present invention provides a wireless microphone frequency management method, which is applied to a wireless microphone frequency management system. The wireless microphone frequency management system includes a transmitting end and a receiving end. The transmitting end is used to receive sound waves, convert the sound waves into electrical signals and convert the electrical signals into radio frequency signals for transmission. The receiving end is used to receive radio frequency signals, such as Figure 7 It also includes a 2.4G channel, which can use an ATS2831P chip. The 2.4G channel includes a 2.4G transmission channel TX3 and a 2.4G receiving channel RX3. The receiving end includes an RX1 channel, an RX2 channel and a 2.4G transmission channel TX3. The transmitting end includes a corresponding TX1 channel, a TX2 channel and a 2.4G receiving channel TX3, including the steps of:

[0040] Step 1, set the frequency band to be used by this device;

[0041] Step 2: The receiving end receives the RF signal, detects the signal level of the entire frequency band from low to high in a frequency width increment of 10K (the step width can be customized) and performs value assignment, recording and saving for all detected frequency points.

[0042] Step 3, screening out multiple high-quality frequency points and multiple available frequency points to form an available frequency band. Generally, the bandwidth of the high-quality frequency point is greater than 400K, and the bandwidth of the available frequency point is not less than 200K;

[0043] Step 4: Initially set the RX1 channel and TX1 channel as standard channels, and initially set the RX2 channel and TX2 channel as standby channels;

[0044] Step 5, check whether the TX2 channel and its currently used frequency point are interfered or the signal quality is deteriorated;

[0045] If not, return to step 2;

[0046] If yes, go to step 6;

[0047] Step 6: Perform frequency point shift operation to change the frequency points of TX2 channel and RX2 channel to real-time preferred frequency points (the preferred frequency point can be shifted to any optimal, nearest, interference-free or clean frequency point in the available frequency band);

[0048] Step 7, check whether the signal of TX1 channel is abnormal;

[0049] If not, return to step 5;

[0050] If yes, go to step 8;

[0051] Step 8, select TX2 channel as the standard channel for signal output, and convert TX1 channel and RX1 channel to standby channels and mark them as value assignments;

[0052] Step 9, check whether the TX1 channel and its currently used frequency point are interfered or the signal quality is deteriorated;

[0053] If not, return to step 5;

[0054] If yes, go to step 10;

[0055] Step 10, perform frequency point shift operation to change the frequency points of TX1 channel and RX1 channel to real-time optimal frequency points;

[0056] Step 11, check whether the signal of TX2 channel is abnormal;

[0057] If not, return to step 5;

[0058] If yes, go to step 12;

[0059] Step 12, select TX1 channel as the standard channel for signal output, immediately convert TX2 channel and RX2 channel to spare channels and mark them as value, and return to step 5.

[0060] That is, firstly, the received RF signal is tested for the full-band signal level to filter out the high-quality frequency points and available frequency points, and the standard channel and the spare channel are set. When the current standard channel is interfered, the frequency point offset operation is performed to change the frequency point of the spare channel to the real-time preferred frequency point. Then, if the signal of the standard channel in use is detected to be abnormal, the spare channel is selected as the standard channel for signal output, and the standard channel in use is immediately converted to the spare channel, and the output channel of the signal is switched immediately to ensure that the transmission content remains unchanged and the transmission quality remains unchanged. At the same time, the frequency point of the spare channel is offset to the interference-free frequency band to ensure the quality of the transmission content, which can ensure that the receiving channel is selected from the standard channel and the spare channel at any time, and the output signal is switched to a high-quality receiving signal. Compared with the traditional frequency hopping that requires two-way communication, this system has better timeliness, is less susceptible to interference, and does not need to change any parameters of the channel currently in use when performing the channel switching operation. It can truly achieve only sending and not receiving, and does not require post-transmission management and tracking, and does not need to consider the trouble of packet loss, and can complete accurate frequency management and subsequent detection without two-way communication.

[0061] Furthermore, step 3.1 is included between step 3 and step 4. Step 3.1 is: save the high-quality frequency points and available frequency points in order from low to high, and after saving, display the high-quality frequency points and available frequency points in the form of spectrum totems. The screen can be displayed in split screen, segmented, or full screen, or by connecting an external display. The spectrum level values ​​with a 10K incremental width are displayed preferentially. The high-quality frequency points and available frequency points are divided into segments and grouped, and displayed in an arrangement from preferred to available (the arrangement method can be customized).

[0062] Furthermore, the frequency point shift operation in step 6 specifically includes:

[0063] Step 6.1, change the receiving frequency point of the RX2 channel, which is the new frequency point of the TX2 channel to be changed allocated in real time; at the same time, send the TX2 frequency point change offset instruction through the 2.4G sending channel;

[0064] Step 6.2, receive the TX2 frequency point change offset instruction through the 2.4G receiving channel RX3, identify and execute the TX2 frequency point change offset instruction, and immediately update the transmission frequency of the TX2 channel to the real-time preferred frequency point. The RX2 channel receives the transmission signal of the TX2 channel and demodulates it in the conventional U-segment demodulation method.

[0065] The frequency point shift operation in step 10 specifically includes:

[0066] Step 10.1, change the receiving frequency point of the RX1 channel, which is the new frequency point of the TX1 channel to be changed allocated in real time; at the same time, send the TX1 frequency point change offset instruction through the 2.4G sending channel;

[0067] Step 10.2, receive the TX1 frequency point change offset instruction through the 2.4G receiving channel RX3, identify and execute the TX1 frequency point change offset instruction, and immediately update the transmit frequency of the TX1 channel to the real-time preferred frequency point. The RX1 channel receives the transmit signal of the TX1 channel and demodulates it in the conventional U-segment demodulation method.

[0068] Furthermore, step 60 is also included between step 6 and step 7, and step 60 is: detect whether the set UHF full frequency band includes a frequency point that can be used as a preferred frequency point. If not, the switching signal is transmitted through the 2.4 channel, and the RX1 channel, TX1 channel or RX2 channel, TX2 channel signals are normal before switching back to normal mode.

[0069] Furthermore, step 61 is included between step 60 and step 7. Step 61 is: if the 2.4G channel is interfered, all output channels are closed and a prompt "the entire frequency band of the carrier is disabled due to interference" is given.

[0070] like Figure 1The present invention also includes a wireless microphone frequency management system, which uses the above-mentioned wireless microphone frequency management method, including: a transmitting end and a receiving end, the transmitting end is used to receive sound waves, convert the sound waves into electrical signals and convert the electrical signals into radio frequency signals for transmission, and the receiving end is used to receive radio frequency signals. The transmitting end includes a 2.4G transmission channel TX3, and the receiving end includes a microcontroller 1 and 2.4G receiving channel RX3, RX4 units, a signal level detection circuit, a noise level detection circuit and a channel selection control circuit, which are respectively electrically connected to the microcontroller 1. The RX1 channel and the RX2 channel are respectively electrically connected to the microcontroller 1. The RX1 channel includes a radio frequency amplification circuit 1, a modulation and demodulation circuit 1, a signal separation circuit 1, an audio restoration circuit 1 and an audio channel 1. The RX4 unit is used to receive radio frequency signals. The radio frequency signal is amplified by the radio frequency amplification circuit 1, modulated and demodulated by the modulation and demodulation circuit 1, and then enters the signal separation circuit 1. The separated signal is restored by the audio restoration circuit 1 to obtain an audio signal 1, and the audio signal 1 enters the channel selection control circuit; the RX2 channel includes a radio frequency amplification circuit 2, a modulation and demodulation circuit 2, a signal separation circuit 2, Audio restoration circuit 2 and audio channel 2, the radio frequency signal is amplified by the radio frequency amplifier circuit 2, modulated and demodulated by the modulation and demodulation circuit 2, and then enters the signal separation circuit 2, the separated signal is restored by the audio restoration circuit 2 to obtain the audio signal 2, and the audio signal 2 enters the channel selection control circuit; and the signal level detection circuit is electrically connected to the modulation and demodulation circuit 1 and the modulation and demodulation circuit 2 respectively to screen out high-quality frequency points and available frequency points; the noise level detection circuit is electrically connected to the audio restoration circuit 1 and the audio restoration circuit 2 respectively to detect noise interference and audio quality; the channel selection control circuit is electrically connected to the audio channel 1 and the audio channel 2 respectively, when it is detected that there is noise interference on the standard use channel / spare channel or the audio signal quality deteriorates, the channel selection control circuit switches the signal output from the standard use channel / spare channel to the spare channel / standard use channel.

[0071] like Figure 2The transmitting end includes a microcontroller 2 and an address generation module, a pilot signal module and a second audio processing module electrically connected to the microcontroller 2 respectively. The TX1 channel, the TX2 channel and the 2.4G transmission channel TX3 are electrically connected to the microcontroller 2 respectively. The second audio processing module is used to pick up sound waves, convert the sound waves into electrical signals and mix, modulate and demodulate the electrical signals to generate radio frequency signals. The address generation module is electrically connected to the second audio processing module to assign addresses to radio frequency signals. The pilot signal module is electrically connected to the second audio processing module to provide a pilot signal. The second audio processing module includes a pickup and a signal processing circuit. The input end of the signal processing circuit is electrically connected to the pickup to convert sound waves into electrical signals. The output end of the signal processing circuit is electrically connected to the TX1 channel and the TX2 channel respectively. The TX1 channel includes a signal mixing circuit 1, a modulation and demodulation circuit 5, and a radio frequency amplification circuit 5. After being mixed by the signal mixing circuit 1, multiple electrical signals enter the modulation and demodulation circuit 5, and then the radio frequency signals are emitted through the radio frequency amplification circuit 5; the TX2 channel includes a signal mixing circuit 2, a modulation and demodulation circuit 6, and a radio frequency amplification circuit 6. After being mixed by the signal mixing circuit 2, multiple electrical signals enter the modulation and demodulation circuit 6, and then the radio frequency signals are emitted through the radio frequency amplification circuit 6. The address generation module is electrically connected to the signal mixing circuit 1 and the signal mixing circuit 2 respectively, and the pilot signal module is electrically connected to the modulation and demodulation circuit 3 and the modulation and demodulation circuit 4 respectively.

[0072] like Figure 3 , is a circuit schematic diagram of the receiving end microcontroller 1, and both microcontroller 1 and microcontroller 2 use existing main control chips; Figure 4 , is a schematic diagram of a noise level detection circuit. The noise level detection circuit can adopt an existing noise detection circuit; Figure 5 , is a signal level detection circuit, which can use the existing signal detection circuit that can detect the level of the radio frequency signal to screen out the high-quality frequency points and the available frequency points; such as Figure 6 The receiving end also includes a pilot signal detection circuit electrically connected to the microcontroller, and the pilot signal detection circuit is electrically connected to the signal separation circuit 1 and the signal separation circuit 2 respectively to detect and obtain the pilot signal. Further, the second audio processing module includes a volume adjustment circuit 2, and the volume adjustment circuit 2 is electrically connected to the signal processing circuit.

[0073] The signal level detection circuit of the system is used to detect the level of the received radio frequency signal to screen out high-quality frequency points and available frequency points. The microcontroller 1 sets the RX1 channel and the audio channel 1 as the standard use channel for transmitting high-quality frequency points, and sets the RX2 channel and the audio channel 2 as the spare channel for transmitting available frequency points; and because the channel selection control circuit is electrically connected to the audio channel 1 and the audio channel 2 respectively, when the noise level detection circuit detects that there is noise interference on the standard use channel / the spare channel or the audio signal quality deteriorates, the channel selection control circuit switches the signal output from the standard use channel / the spare channel to the spare channel / the standard use channel. Compared with the traditional frequency hopping that requires two-way communication, the system has better timeliness, is less susceptible to interference, and does not need to change any parameters of the channel currently in use when performing the channel switching operation. It truly achieves only sending and not receiving, and does not require post-transmission management and tracking, does not need to consider the trouble of packet loss, and can complete accurate frequency management and subsequent detection without two-way communication.

[0074] It should be noted that in step 3, the frequency management unit in the microcontroller 1 simultaneously monitors and detects in real time in segments and groups with a minimum bandwidth of 2M, and assigns values ​​in real time to save and manage, to ensure that the available frequency points are available in real time, so that the frequency management unit can call and replace the interfered frequency points at any time. (The frequency band width of the real-time segmented monitoring and detection can be changed through system authorization). The signal detection will be divided into two parts for real-time detection. First, the RX1 channel and RX2 channel will self-check in real time, and switch channels if abnormalities are found. Second, the RX4 unit monitors and detects abnormalities and switches channels. Steps 2 to 12 are only for the convenience of description and understanding. In actual applications, each channel in the time domain will be detected and managed separately in real time to achieve a sufficiently small control delay time.

[0075] It is easy for those skilled in the art to understand that the above preferred embodiments can be freely combined and superimposed without conflict.

[0076] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A wireless microphone frequency management method, applied to a wireless microphone frequency management system, the wireless microphone frequency management system comprises a transmitting end and a receiving end, the transmitting end is used to receive sound waves, convert the sound waves into electrical signals and convert the electrical signals into radio frequency signals for transmission, the receiving end is used to receive the radio frequency signals, the receiving end comprises an RX1 channel and an RX2 channel, the transmitting end comprises corresponding TX1 channels and TX2 channels, and is characterized in that: Includes steps: Step 1, set the frequency band to be used by this device; Step 2: The receiving end receives the radio frequency signal, performs full-band signal level detection on the received radio frequency signal in the frequency band to be used, and performs value assignment, recording and saving operations on all detected frequency points; Step 3, screening out multiple high-quality frequency points and multiple available frequency points to form an available frequency band; Step 4: Initially set the RX1 channel and TX1 channel as standard channels, and initially set the RX2 channel and TX2 channel as standby channels; Step 5, check whether the TX2 channel and its currently used frequency point are interfered or the signal quality is deteriorated; If not, return to step 2; If yes, go to step 6; Step 6: Perform frequency point shift operation to change the frequency points of TX2 channel and RX2 channel to real-time optimal frequency points; Step 7, check whether the signal of TX1 channel is abnormal; If not, return to step 5; If yes, go to step 8; Step 8, select TX2 channel for signal output, and convert TX1 channel and RX1 channel to standby channels and mark them as value assignments; Step 9, check whether the TX1 channel and its currently used frequency point are interfered or the signal quality is deteriorated; If not, return to step 5; If yes, go to step 10; Step 10, perform frequency point shift operation to change the frequency points of TX1 channel and RX1 channel to real-time optimal frequency points; Step 11, check whether the signal of TX2 channel is abnormal; If not, return to step 5; If yes, go to step 12; Step 12, select TX1 channel for signal output, convert TX2 channel and RX2 channel to standby channels and mark them as value, and return to step 5.

2. The wireless microphone frequency management method according to claim 1, characterized in that: Step 3.1 is included between step 3 and step 4. Step 3.1 is: saving the high-quality frequency points and the available frequency points in order from low to high, and after saving, displaying the high-quality frequency points and the available frequency points in the form of a spectrum diagram.

3. The wireless microphone frequency management method according to claim 1, characterized in that: The bandwidth of the high-quality frequency point is greater than 400K, and the bandwidth of the available frequency point is not less than 200K.

4. The wireless microphone frequency management method according to claim 1, wherein the wireless microphone frequency management system comprises a 2.4G channel, characterized in that: Step 6 specifically includes: Step 6.1, change the receiving frequency point of the RX2 channel, which is the new frequency point of the TX2 channel to be changed allocated in real time; at the same time, send the TX2 frequency point change offset instruction through the 2.4G channel; Step 6.2, identify and execute the TX2 frequency point change offset instruction, that is, the transmission frequency of the TX2 channel is updated to the real-time preferred frequency point, and the RX2 channel receives the transmission signal of the TX2 channel and demodulates it in a conventional U-segment demodulation manner.

5. The wireless microphone frequency management method according to claim 4, characterized in that: Step 10 specifically includes: Step 10.1, change the receiving frequency point of the RX1 channel, which is the new frequency point of the TX1 channel to be changed allocated in real time; at the same time, send the TX1 frequency point change offset instruction through the 2.4G channel; Step 10.2, identify and execute the TX1 frequency point change offset instruction, that is, the transmission frequency of the TX1 channel is updated to the real-time preferred frequency point, and the RX1 channel receives the transmission signal of the TX1 channel and demodulates it in a conventional U-segment demodulation manner.

6. The wireless microphone frequency management method according to claim 4, characterized in that Step 60 is also included between step 6 and step 7. Step 60 is: detect whether the set UHF full frequency band includes a frequency point that can be used as a preferred frequency point. If not, the switching signal is transmitted through the 2.4G channel, and the original transmission mode is switched back after the RX1 channel, TX1 channel or RX2 channel, TX2 channel signals are normal.

7. The wireless microphone frequency management method according to claim 6, characterized in that: Step 61 is also included between step 60 and step 7. Step 61 is: if the 2.4G channel is interfered, all output channels are closed and a prompt "the entire carrier frequency band is disabled due to interference" is prompted.

8. A wireless microphone frequency management system, applying the wireless microphone frequency management method according to any one of claims 1 to 7, characterized in that: The transmitting end includes a 2.4G transmitting channel TX3, the receiving end includes a microcontroller 1 and 2.4G receiving channel RX3, RX4 units, a signal level detection circuit, a noise level detection circuit and a channel selection control circuit, which are respectively electrically connected to the microcontroller 1, the RX1 channel and the RX2 channel are respectively electrically connected to the microcontroller 1, the RX1 channel includes a radio frequency amplification circuit 1, a modulation and demodulation circuit 1, a signal separation circuit 1, an audio restoration circuit 1 and an audio channel 1, the RX4 unit is used to receive the radio frequency signal, the radio frequency signal is amplified by the radio frequency amplification circuit 1, modulated and demodulated by the modulation and demodulation circuit 1, and then enters the signal separation circuit 1, the separated signal is restored by the audio restoration circuit 1 to obtain the audio signal 1, and the audio signal 1 enters the channel selection control circuit; the RX2 channel includes a radio frequency amplification circuit 2, a modulation and demodulation circuit 2, a signal separation circuit 2, an audio restoration circuit 2 and an audio channel 2, the radio frequency signal is amplified by the radio frequency amplification circuit 2, modulated and demodulated by the modulation and demodulation circuit 2, and then enters the signal separation circuit 2, the separated signal is restored by the audio restoration circuit 2 to obtain the audio signal 2, and the audio signal 2 enters the channel selection control circuit; And the signal level detection circuit is electrically connected to the modulation and demodulation circuit 1 and the modulation and demodulation circuit 2 respectively to screen out the high-quality frequency points and the available frequency points; The noise level detection circuit is electrically connected to the audio restoration circuit 1 and the audio restoration circuit 2 respectively to detect noise interference and audio quality; the channel selection control circuit is electrically connected to the audio channel 1 and the audio channel 2 respectively. When noise interference or deterioration of audio signal quality is detected on the standard channel / spare channel, the channel selection control circuit switches the signal from the standard channel / spare channel to the spare channel / standard channel for output.

9. The wireless microphone frequency management system according to claim 8, characterized in that: The transmitting end includes a microcontroller 2 and an address generation module, a pilot signal module and a second audio processing module electrically connected to the microcontroller 2 respectively. The TX1 channel and the TX2 channel are electrically connected to the microcontroller 2 respectively. The second audio processing module is used to pick up sound waves, convert the sound waves into electrical signals and mix, modulate and demodulate the electrical signals to generate radio frequency signals. The address generation module is electrically connected to the second audio processing module to assign an address to the radio frequency signal. The pilot signal module is electrically connected to the second audio processing module to provide a pilot signal.

10. The wireless microphone frequency management system according to claim 9, characterized in that: The second audio processing module includes a pickup and a signal processing circuit. The input end of the signal processing circuit is electrically connected to the pickup to convert sound waves into electrical signals. The output end of the signal processing circuit is electrically connected to the TX1 channel and the TX2 channel respectively. The TX1 channel includes a signal mixing circuit 1, a modulation and demodulation circuit 5, and a radio frequency amplification circuit 5. After being mixed by the signal mixing circuit 1, multiple electrical signals enter the modulation and demodulation circuit 5, and then the radio frequency signals are emitted through the radio frequency amplification circuit 5; the TX2 channel includes a signal mixing circuit 2, a modulation and demodulation circuit 6, and a radio frequency amplification circuit 6. After being mixed by the signal mixing circuit 2, multiple electrical signals enter the modulation and demodulation circuit 6, and then the radio frequency signals are emitted through the radio frequency amplification circuit 6. The address generation module is electrically connected to the signal mixing circuit 1 and the signal mixing circuit 2 respectively, and the pilot signal module is electrically connected to the modulation and demodulation circuit 3 and the modulation and demodulation circuit 4 respectively.

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