Method for sharing wireless microphone receiver through infrared frequency matching and gesture recognition

Abstract

The invention discloses a method for sharing a wireless microphone receiver through infrared frequency matching and gesture recognition. The receiver comprises a receiver control module, a shared infrared transmitting module and a receiver infrared receiving module, wherein the shared infrared transmitting module and the receiver infrared receiving module are connected with the receiver control module. The wireless microphone comprises a microphone control module and a microphone infrared receiving module connected with the microphone control module; the method supports execution and switching of an infrared frequency matching mode and a gesture recognition mode, and comprises the following steps that a receiver control module continuously monitors the surrounding environment and judges whether infrared frequency matching operation with a wireless microphone needs to be carried out or not; if frequency matching is needed, the gesture recognition mode is closed, and the infrared frequency matching mode is switched, and if frequency matching is not needed, the infrared frequency matching mode is closed, and the gesture recognition mode is switched; an original infrared emission module of the receiver is ingeniously multiplexed, only a small number of elements are newly added to achieve the gesture recognition function, and meanwhile reliable work of the infrared frequency matching function and the gesture recognition function is guaranteed through strict mode switching logic.

Description

Technical Field

[0001] This invention relates to a method for using a wireless microphone receiver that combines infrared frequency matching and gesture recognition, and belongs to the field of wireless microphone audio receiving equipment. Background Technology

[0002] In the field of wireless microphone audio receiving equipment, infrared frequency pairing and operation control functions have become standard features, while gesture recognition, as an emerging interaction method, is gradually being adopted by high-end devices. However, existing solutions for implementing gesture functions generally suffer from problems such as high cost, complex structure, and susceptibility to interference, which limits their widespread adoption in mainstream wireless microphone receiving equipment.

[0003] Currently, some wireless microphone receivers that support gesture recognition achieve this function by integrating an infrared gesture chip or an infrared transceiver module. These chips typically require complex interfaces such as IIC or SPI for control, increasing both hardware design complexity and production costs. Furthermore, the large size of infrared gesture modules places high demands on the internal structural layout of the device, making it difficult to optimize the overall product size. More importantly, the infrared transmitting section integrated within these modules generates significant infrared signal interference when operating in the infrared band, severely affecting the microphone's original infrared frequency pairing function, leading to unstable pairing or even pairing failure.

[0004] Furthermore, existing infrared gesture solutions on the market often require the independent development of infrared transmitting and receiving circuits, which not only increases hardware costs but also makes the device structure more complex. For wireless microphone receiving devices that prioritize low cost and high reliability, these solutions are clearly insufficient to meet practical needs.

[0005] To address the aforementioned issues, there is an urgent need to design a low-cost wireless microphone receiver that combines infrared frequency pairing and gesture recognition capabilities. Summary of the Invention

[0006] To address the aforementioned existing technical problems, this invention provides a method for using a wireless microphone receiver for both infrared frequency pairing and gesture recognition. By cleverly reusing the original infrared frequency pairing transmission hardware of the wireless microphone receiver and adding only a few components, the infrared gesture recognition function is realized. At the same time, a strict mode switching logic ensures the reliable operation of both infrared frequency pairing and gesture recognition functions, thereby achieving the technical objectives of low cost, simple structure, and anti-interference.

[0007] To achieve the above technical objectives, this invention provides a method for using a wireless microphone receiver that combines infrared frequency pairing and gesture recognition. The receiver includes a receiver control module, a shared infrared transmitting module, and a receiver infrared receiving module connected to the receiver. The wireless microphone includes a microphone control module and a microphone infrared receiving module connected to the microphone. The method supports the execution and switching between infrared frequency pairing mode and gesture recognition mode, and includes the following steps: The receiver control module continuously monitors the surrounding environment to determine whether infrared frequency pairing with the wireless microphone is required. If frequency pairing is required, turn off the gesture recognition mode and switch to infrared frequency pairing mode: The receiver control module outputs a modulated pulse signal, which is converted into an infrared light signal by the shared infrared transmitter module and transmitted to the wireless microphone; the microphone infrared receiver module converts the received infrared light signal into a modulated pulse signal, the microphone control module decodes the modulated pulse signal and adjusts its own frequency to match the receiver, thus completing infrared frequency pairing; If frequency pairing is not required, the infrared frequency pairing mode is turned off and the gesture recognition mode is switched to: The receiver control module outputs a fixed frequency pulse signal, which is converted into an infrared light signal by the shared infrared transmitting module and then transmitted; when a gesture or obstacle approaches the shared infrared transmitting module, the infrared light signal is reflected to the receiver infrared receiving module. The infrared receiving module converts the received infrared light signal into a DC signal. The receiver control module detects the amplitude change of the DC signal to determine the movement trajectory of the gesture or obstacle, thereby realizing gesture recognition.

[0008] Furthermore, the common infrared emitting module includes an amplification circuit and an infrared emitting tube, and the output I / O port of the receiver control module is connected to the infrared emitting tube via the amplification circuit; the receiver infrared receiving module includes an infrared receiving tube, an amplification circuit, and a rectifier and filter circuit, and the receiver infrared receiving tube is connected to the ADC input I / O port of the receiver control module in sequence via the amplification circuit and the rectifier and filter circuit.

[0009] Furthermore, the infrared emitting tube and the infrared receiving tube are spaced 10-100mm apart.

[0010] Furthermore, the infrared receiving tube and the infrared receiving tube are infrared pairs with a diameter of 3mm or 5mm.

[0011] Furthermore, in this invention, both the receiver control module and the microphone control module employ an MCU with an ADC detection pin and an I / O port, or an integrated circuit with an I / O port and an ADC detection pin.

[0012] Furthermore, the microphone infrared receiving module includes an infrared receiving tube and an amplification circuit, and the infrared receiving tube is connected to the modulation signal input I / O port of the microphone control module via the amplification circuit.

[0013] The working principle of this invention is as follows: This invention revolves around the coordinated operation of infrared frequency pairing and gesture recognition functions. The receiver control module controls the switching between the two and the execution of their respective functions. The receiver control module first determines whether frequency pairing with the wireless microphone is required. When infrared frequency pairing is needed, the receiver control module disables the infrared gesture recognition function to prevent the infrared signal from interfering with the frequency pairing process. Then, it controls the infrared transmitter to emit an infrared carrier signal to the wireless microphone, completing the transmission of the infrared frequency pairing signal. When infrared frequency pairing is not needed, the receiver control module enters the infrared gesture recognition mode and controls the infrared transmitter to emit an infrared signal at a fixed frequency. When an arm or obstacle approaches the infrared transmitter, the infrared light signal is reflected, and the infrared receiver receives part of the reflected infrared light signal, amplifies it, and then filters it to convert it into a DC signal. Because the intensity of the reflected infrared light increases and then decreases as the arm or obstacle approaches and moves away from the infrared transmitter, the converted DC signal exhibits dynamic amplitude changes with distance (increasing when approaching and decreasing when moving away). The receiver control module detects changes in the amplitude of the DC signal in real time to determine whether an arm or obstacle is approaching or moving away, thus enabling infrared gesture recognition. Throughout the process, the receiver control module plays a crucial coordinating role, rationally switching between infrared frequency pairing and gesture functions to ensure their orderly operation and avoid signal interference.

[0014] In summary, this invention provides a low-cost infrared gesture implementation scheme for wireless microphone audio receiving devices. On a wireless microphone receiver supporting infrared frequency pairing, through simplified hardware collaboration and a time-division multiplexing mechanism, it achieves low-cost integration of infrared frequency pairing and gesture recognition functions. Its core technologies are summarized as follows: (1) Minimalist Hardware Collaboration: The infrared gesture recognition function reuses the receiver's original infrared frequency transmission module. Only an additional 3mm or 5mm diameter infrared receiver tube (as a dedicated gesture receiver) is needed, along with an amplifier circuit, a filtering circuit, and the receiver control module's ADC input I / O port, to construct the infrared gesture recognition function. Furthermore, ‌ The distance between the newly added infrared receiver and the original infrared transmitter can be within the range of 10-100mm, and can be flexibly adjusted according to the actual needs of the product.

[0015] (2) ‌Time-division multiplexing mechanism: The receiver supports two operating modes: infrared frequency pairing and infrared gesture recognition. The infrared frequency pairing mode and the infrared gesture recognition mode are controlled by the control module logic to achieve strict function switching and separation, ensuring that the infrared transmitter only serves one function (frequency pairing or gesture recognition) at any given time. This fundamentally eliminates the interference that may occur between the two functions in the infrared band and ensures the high reliability of both functions.

[0016] Compared with the prior art, the present invention has the following technical advantages: (a) Significantly reduced cost: By reusing existing infrared transmitting modules, only a 3mm or 5mm diameter infrared receiver and simple circuitry are needed to achieve infrared gesture functionality. Compared to traditional solutions that require additional infrared gesture chips or modules, hardware costs are significantly reduced.

[0017] (b) Highly streamlined structure: No dedicated structure for the infrared gesture module needs to be designed separately; the infrared receiver tube can be directly integrated into the existing casing or circuit board of the receiver. Compared to traditional solutions that require reserved space for module installation, the overall size is significantly reduced.

[0018] (c) Completely eliminate interference risk: By using the "two-choice" mechanism of infrared gesture recognition and infrared frequency pairing (such as turning off gesture transmission during frequency pairing and pausing frequency pairing during gesture operation), the conflict problem between the infrared transmission module and the frequency pairing signal in the 940nm band in the traditional solution is completely avoided. Attached Figure Description

[0019] Figure 1 This is a block diagram of the electrical principle of the shared infrared transmitting module and the microphone infrared receiving module in this invention; Figure 2 This is an electrical block diagram of the shared infrared transmitting module and the receiver infrared receiving module in this invention; Figure 3 This is a circuit diagram of a shared infrared emitting module in one embodiment of the present invention; Figure 4 This is a circuit diagram of a microphone infrared receiving module in one embodiment of the present invention; Figure 5 This is a circuit diagram of the infrared receiving module of the receiver in one embodiment of the present invention; Figure 6 This is a schematic diagram illustrating the principle of the present invention for performing infrared gesture recognition as an arm or obstacle approaches or moves away; Figure 7 This is a flowchart illustrating the process of executing and switching between infrared frequency pairing mode and gesture recognition mode in this invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with embodiments of this invention. In the description of this application, terms such as "connection" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] Example 1: As Figure 1 and Figure 2 As shown, this embodiment provides a wireless microphone receiver that combines infrared frequency pairing and gesture recognition. The receiver includes a receiver control module, and a shared infrared transmitting module and a receiver infrared receiving module connected thereto. The wireless microphone includes a microphone control module and a microphone infrared receiving module connected thereto, and needs to be used after infrared frequency pairing with the receiver. Details are as follows.

[0022] like Figures 3 to 5 As shown, both the receiver control module and the microphone control module employ an MCU with an ADC detection pin and an I / O port, or an integrated circuit integrating an I / O port and an ADC detection pin. The receiver control module is responsible for processing infrared signals, managing frequency selection, and outputting audio signals, while the microphone control module is responsible for receiving infrared signals, synchronizing frequencies, and transmitting audio signals. These are all current technologies and will not be elaborated further.

[0023] like Figure 1 As shown, the shared infrared emitting module includes an amplifier circuit and an infrared emitting tube. The output I / O port of the receiver control module is connected to the infrared emitting tube via the amplifier circuit. The functions of each part are described below: 1) Output I / O port of the receiver control module: For example, in an MCU with an ADC detection pin and I / O port, its output I / O port serves as the "power carrier" of the infrared signal. Its core function is to provide an electrical signal. In frequency matching mode, it outputs a modulated pulse signal, and in gesture mode, it outputs a fixed frequency pulse signal, providing the original electrical signal source for subsequent infrared transmission. 2) Amplifier circuit: It is responsible for amplifying the pulse signal output by the modulation circuit to ensure sufficient driving current for the infrared emitting tube, thereby ensuring the transmission intensity of the infrared light signal and meeting the signal transmission requirements at close range (such as gesture recognition) or specific distances (such as frequency matching). 3) Infrared emitting tube: As the core component of infrared transmission, its function is to convert the amplified electrical signal into an infrared light signal, realizing the energy conversion from "electricity" to "light", and finally completing the spatial transmission of the infrared signal through physical light emission.

[0024] In other embodiments, such as Figure 3As shown, the shared infrared emitting module includes resistors R8, R9, and R10, transistor Q6, and infrared LED pair D4. The specific connections are as follows: The receiver control module or MCU output I / O port (R_IO_OUT) is connected to one end of resistor R9 (4.7KΩ). The other end of resistor R9 is connected to one end of resistor R10 (10000Ω) and the base (B) of transistor Q6 (S8050M-D). The other end of resistor R10 (10000Ω) and the emitter (E) of transistor Q6 are grounded (GND). The collector (C) of transistor Q6 is connected to one end of resistor R8 (10Ω). The other end of resistor R8 (10Ω) is connected to the negative terminal of infrared LED pair D4. The positive terminal of infrared LED pair D4 is connected to a +5V power supply.

[0025] In the circuit design described above, transistor Q6 and its associated resistors R9 and R10 constitute the core amplifier circuit. Transistor Q6 acts as an amplifying device; its base receives the I / O signal output from the control module through resistor R9, and its collector drives the infrared LED D4 to emit light through resistor R8. Resistor R10 provides suitable bias conditions for the transistor, ensuring it operates in amplification mode. The receiver control module or MCU controls the conduction and cutoff of transistor Q6 by outputting a signal through its I / O port. When the I / O port outputs a high level, current flows through R9 to the base of transistor Q6, turning it on. At this time, the +5V power supply forms a loop through resistor R8, the conducting transistor Q6, and ground, allowing current to flow through the infrared LED D4, thus emitting light and achieving the infrared signal transmission function. When the I / O port outputs a low level, transistor Q6 is cut off, no current flows through the infrared LED D4, and it does not emit light.

[0026] like Figure 1 As shown, the microphone infrared receiving module includes an infrared receiving tube and an amplifier circuit. The infrared receiving tube is connected to the modulation signal input I / O port of the microphone control module via the amplifier circuit. The functions of each part are described below: 1) Infrared receiving tube: As the core component of infrared reception, its function is to convert the infrared light signal emitted by the receiver into an electrical signal, realizing the energy conversion from light to electricity. 2) Amplifier circuit: Used to amplify the weak electrical signal output by the infrared receiving tube, improve the signal strength, and provide a stable and reliable signal input for subsequent circuit processing. 3) Modulation signal input I / O port of the microphone control module: For example, in an MCU with an ADC detection pin and an I / O port, the modulation signal input I / O port of its input I / O port is responsible for generating the electrical signal of the modulation pulse in frequency matching mode. By forming a "signal interaction" with the infrared signal emitted by the receiver, the signal matching in the frequency matching process is completed.

[0027] In practice, the receiver achieves infrared frequency pairing via a shared infrared transmitting module as follows: The user brings the wireless microphone close to the shared infrared transmitting module, and the receiver control module activates it, outputting a 38kHz modulated pulse signal. This modulated pulse signal is amplified and drives the infrared emitting tube to emit a 940nm infrared light signal. The transmission distance needs to be controlled within 5-10cm to reduce interference. The microphone unit's infrared receiving tube captures this infrared light signal, which is then amplified and converted into a pulse modulated signal by the microphone control module. This signal is then matched with the internal signal source, thus achieving frequency pairing. Afterward, the shared infrared transmitting module enters a non-operating state.

[0028] In other embodiments, such as Figure 4 As shown, the microphone infrared receiver module includes an infrared remote control receiver head (IRM), resistors R11, R12, and R13, and capacitor C7. The specific connections are as follows: The modulation signal input IO port (R_IO_IN) of the microphone control module or MCU is connected to the OUT pin of the infrared remote control receiver head (IRM) through resistor R13 (100R) to receive its output signal. The VCC pin of the infrared remote control receiver head (IRM) is connected to a 3V3 power supply through resistor R11 (100R) to power the IRM. Simultaneously, it is connected to the GND pin of the IRM through capacitor C7 (0.1μF) for power filtering and other processing to stabilize the power supply. The OUT pin of the infrared remote control receiver head (IRM) is connected to a 3V3 power supply through resistor R12 (100k). The GND pin of the infrared remote control receiver head (IRM) is grounded.

[0029] In the circuit design described above, the infrared remote control receiver (IRM) integrates an infrared receiver tube and an amplifier circuit. As an integrated receiving device, the IRM contains a photodiode (infrared receiver tube) for receiving infrared light signals, as well as subsequent amplification circuitry. External resistors R11, R12, R13, and capacitor C7 primarily serve auxiliary functions: R11 and C7 form a power supply filter circuit, providing a stable 3.3V power supply to the receiver; R12 acts as a pull-up resistor, ensuring the receiver's output level is maintained when there is no signal; R13 acts as a current-limiting resistor, protecting the modulation signal input I / O port of the microphone control module. The input I / O port receives the signal output from the OUT pin and performs decoding operations to identify commands issued by the user via the remote control.

[0030] like Figure 2As shown, the receiver's infrared receiving module includes an infrared receiving tube, an amplifier circuit, and a rectifier and filter circuit. The infrared receiving tube is connected to the ADC input I / O port of the receiver control module via the amplifier circuit and the rectifier and filter circuit. The functions of each part are as follows: 1) Infrared receiving tube: As the core sensing element for infrared reception, its function is to receive infrared light signals and convert them into weak electrical signals. 2) Amplifier circuit: Used to amplify the weak electrical signals output by the infrared receiving tube, providing a signal of sufficient strength for subsequent circuits. 3) Rectifier and filter circuit: The received pulse signal is rectified by a diode and filtered by an RC circuit into a relatively smooth DC signal that can be measured. 4) ADC input I / O port of the control module: If an MCU with an ADC detection pin and an I / O port is used, its input I / O port pin has an ADC input detection function, which can realize DC signal ADC detection.

[0031] In particular, this invention uses the receiver's original infrared transmitting module as a shared infrared transmitting module. When this module stops working after completing frequency pairing, this invention utilizes it as an infrared transmitting module for gesture recognition. A 3mm or 5mm infrared receiving tube is added close to the shared infrared transmitting module. This infrared receiving tube can be directly integrated into the receiver's original casing or circuit board, and its position relative to the original infrared transmitting tube can be flexibly adjusted within a 10-100mm range according to the actual needs of the product.

[0032] In practice, the receiver achieves gesture recognition through a shared infrared transmitting module as follows: The receiver control module transmits a fixed-frequency pulse signal, which is then converted into an infrared light signal by an amplification circuit. When a gesture or obstacle obstructs the shared infrared transmitting module, part of the infrared light signal is reflected onto a newly added infrared receiving tube. After amplification, it is converted into a pulse signal, which is then rectified and filtered into a DC signal. The intensity of this DC signal dynamically changes with the movement of the gesture (reaching its peak value at the closest distance). By detecting the peak value changes (such as increasing or decreasing trends) and the number of changes in the DC signal, the receiver control module can recognize gestures such as "swiping," "approaching," or "moving away."

[0033] In other embodiments, such as Figure 5As shown, the infrared receiving module of the receiver includes an infrared diode receiver, an infrared pulse signal receiving circuit, an infrared pulse signal amplification circuit, and an infrared signal rectification and filtering circuit. It converts the infrared light signal into an electrical signal recognizable by the control module through voltage division, amplification, rectification, and filtering. The specific circuit connections are as follows: 1) Infrared Pulse Signal Receiving Circuit: The negative terminal of the infrared diode receiver LED D1 is connected to the power supply (+VCC), and the positive terminal is connected to one end of capacitor C36 (1μF) and one end of resistor R7 (200KΩ). The other end of resistor R7 (200KΩ) is connected to the power supply (+VCC) via capacitor C3 (100nF), and the other end of resistor R7 (200KΩ) is grounded. 2) Infrared pulse signal amplification circuit: The other end of capacitor C36 (1μF) is connected to the inverting input terminal (pin 9) of operational amplifier U1C via resistor R94 (22K). The non-inverting input terminal (pin 10) of operational amplifier U1C is connected to the VREF_4V5 terminal. The inverting input terminal (pin 9) is connected to the output terminal (pin 8) via resistor R92 (100 KΩ). The output terminal (pin 8) is connected to one end of capacitor C35 (1μF). Pin 4 is connected to the op-amp power supply, and pin 11 is connected to analog ground. 3) Infrared signal rectification and filtering circuit: The other end of capacitor C35 (1μF) is connected to the positive terminal of diode D2 (IN4148). The negative terminal of diode D2 (IN4148) is connected to one end of resistor R6 (4.7 KΩ). The other end of resistor R6 (4.7 KΩ) is connected to ground via capacitor C37 (1μF) and to the ADC input IO port of the receiver control module (such as MCU).

[0034] In the above circuit design, the infrared pulse signal receiving circuit converts the received infrared light signal into a weak electrical signal, which is then stabilized through resistor voltage division and capacitor filtering. Operational amplifier U1C amplifies the weak signal with high gain, and the amplified signal is coupled to subsequent circuits through capacitor C35 to avoid the influence of DC offset. Diode D2 rectifies the AC signal into a unidirectional pulse, which is then filtered by capacitor C37 to output a smooth DC signal, providing a stable input for the receiver control module.

[0035] As described in the above embodiments, the microphone infrared receiving module and the receiver infrared receiving module share the same common infrared transmitting module. The core difference between the two lies in the type of transmitted signal: in infrared frequency pairing mode, the receiver's common transmitting module transmits modulated pulses for the microphone infrared receiving module to receive and complete frequency pairing; in infrared gesture recognition mode, the receiver's common transmitting module switches to transmitting fixed-frequency pulses. When the common infrared transmitting module is not in frequency pairing mode, its hardware resources are reused as an infrared emission source for gesture recognition: the emitted fixed-frequency infrared light is reflected by gestures (such as blocking, waving, etc.), and the receiver infrared receiving module captures the changes in the reflected signal, thereby realizing near-field gesture sensing control. Furthermore, the switching between the two modes is uniformly judged and managed by the control module, ensuring that the infrared frequency pairing function and the infrared gesture recognition function (such as hand swiping, proximity / distance sensing) operate independently as needed. This "shared transmission + independent reception" architecture design reuses the receiver's original infrared transmitting hardware and ensures the reliability of signal reception in different functional scenarios through the independent infrared receiving modules of the wireless microphone and the receiver.

[0036] Example 2: Figure 6 and Figure 7 As shown in the figure, this embodiment provides a method for using a wireless microphone receiver that combines infrared frequency pairing and gesture recognition. The wireless microphone receiver that combines infrared frequency pairing and gesture recognition supports the execution and switching of infrared frequency pairing mode and gesture recognition mode. The specific steps are described below.

[0037] S1. Mode Judgment: The receiver control module continuously monitors the environment to determine whether infrared frequency pairing with the wireless microphone is required.

[0038] In practice, the receiver prioritizes infrared frequency pairing mode. To this end, the receiver control module continuously monitors the surrounding environment. When the user brings the microphone's infrared receiving module close to the receiver's IR transmission window, the frequency pairing process is triggered. Upon detecting the wireless microphone's frequency pairing request, the receiver control module initiates infrared frequency pairing with the wireless microphone.

[0039] S2, Infrared Frequency Pairing Mode: If frequency pairing is required, turn off the gesture recognition mode and switch to infrared frequency pairing mode: The receiver control module outputs a modulated pulse signal, which is converted into an infrared light signal by the shared infrared transmitting module and transmitted to the wireless microphone; the microphone infrared receiving module converts the received infrared light signal into a modulated pulse signal, and the microphone control module decodes the modulated pulse signal and adjusts its own frequency to match the receiver, thus completing infrared frequency pairing.

[0040] In practice, if infrared frequency pairing is required, the receiver control module first checks if it is currently in infrared gesture recognition mode. If so, it immediately performs a mode switching operation, switching from infrared gesture recognition mode to infrared frequency pairing mode. During this process, the receiver control module drives the shared infrared transmitting module to transmit a specific infrared light signal to the wireless microphone. This infrared light signal carries the frequency pairing command and frequency synchronization information. After receiving this infrared light signal, the microphone unit's infrared receiving module converts it into an electrical signal and transmits it to the microphone control module. The microphone control module decodes the received infrared signal, identifies the frequency pairing command, and then adjusts its own operating frequency to match the receiver's frequency setting. Through this two-way infrared signal transmission and processing mechanism, frequency synchronization and communication connection establishment between the receiver and the wireless microphone are achieved, completing the entire infrared frequency pairing operation process.

[0041] S3. If frequency pairing is not required, turn off the infrared frequency pairing mode and switch to gesture recognition mode: e.g. Figure 6 As shown, the receiver control module outputs a pulse signal of fixed frequency, which is converted into an infrared light signal by a shared infrared transmitting module and then transmitted. When a gesture or obstacle approaches the shared infrared transmitting module, the infrared light signal is reflected to the receiver's infrared receiving module. The infrared receiving module converts the received infrared light signal into a DC signal. The receiver control module detects the amplitude change of this DC signal to determine the movement trajectory of the gesture or obstacle, thus realizing gesture recognition.

[0042] In practical implementation, when the receiver does not need to perform infrared frequency pairing with the wireless microphone, the receiver system automatically switches to infrared gesture recognition mode. The receiver control module drives the shared infrared transmitting module to continuously emit infrared light signals at a fixed frequency. When a user gesture (such as a palm) or an obstacle enters the detection area, some infrared light is reflected, and the reflected light signal is captured by the receiver's infrared receiving module. The infrared receiving tube converts the received reflected light signal into a weak current signal. This signal is amplified to the millivolt level by a preamplifier, and then rectified and filtered to remove environmental interference and noise, finally converting it into a stable DC signal. The receiver control module judges the gesture action by monitoring the intensity change of this DC signal in real time: when the signal strength increases, it indicates that the object is approaching the infrared transmitting tube; when the signal strength decreases, it indicates that the object is moving away from the infrared transmitting tube. By analyzing this dynamic change pattern, the system can recognize different gesture commands (such as waving, approaching, moving away, etc.), thereby realizing non-contact infrared gesture recognition control function. This mode can be applied to various human-computer interaction scenarios such as volume adjustment, channel switching, and device control.

[0043] It's important to note that the core principle of gesture recognition is based on the dynamic changes in the intensity of infrared reflected signals. When a gesture or obstacle is positioned between the infrared emitter and receiver, the reflection path is shortest, signal attenuation is minimal, and the received infrared pulse signal is strongest, corresponding to a peak DC signal amplitude. As the gesture or obstacle moves closer to the center, the reflected signal intensity gradually increases, and the DC signal amplitude increases accordingly. When the gesture or obstacle moves away from the center (i.e., moves further away), the reflected signal intensity gradually weakens, and the DC signal amplitude decreases. Therefore, during a complete "approach-away" wave of a gesture (such as a hand) or obstacle, the intensity of the reflected infrared light signal exhibits a "weak→strong→weak" trend, and the corresponding DC signal amplitude dynamically shows a "low→high→low" waveform. By detecting and analyzing this dynamic change in the DC signal, such as the number of peak amplitude occurrences and the rate of change, the receiver control module can identify one or more consecutive waving gestures, thus achieving infrared gesture control functionality. This gesture recognition method based on changes in reflected signal intensity has advantages such as fast response, accurate recognition, and strong anti-interference ability, and is suitable for various infrared gesture control application scenarios.

[0044] In summary, this invention cleverly utilizes the existing infrared transmitting module of the receiver. By adding an infrared receiving tube with a diameter of 3mm or 5mm and a simple circuit, gesture recognition functionality can be achieved. In particular, the microphone infrared receiving module and the receiver infrared receiving module share the same infrared transmitting module, and the infrared frequency pairing mode and gesture recognition mode are strictly separated through the logic control of the receiver control module. This avoids the infrared transmitting tube operating in both functions simultaneously, achieving "one transmitting circuit, two function switching." This design not only avoids infrared band interference problems that may be caused by the infrared transmitting part in the gesture recognition function, but also greatly reduces hardware costs and structural complexity, providing a feasible solution for the widespread adoption of gesture recognition functionality in wireless microphone receivers.

[0045] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, based on the ideas of the present invention, modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the ideas and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for using a wireless microphone receiver that combines infrared frequency pairing and gesture recognition, characterized in that, The receiver includes a receiver control module, a shared infrared transmitting module, and a receiver infrared receiving module connected thereto; the wireless microphone includes a microphone control module and a microphone infrared receiving module connected thereto; the method supports the execution and switching of infrared frequency pairing mode and gesture recognition mode, and includes the following steps: The receiver control module continuously monitors the surrounding environment to determine whether infrared frequency pairing with the wireless microphone is required. If frequency pairing is required, turn off the gesture recognition mode and switch to infrared frequency pairing mode: The receiver control module outputs a modulated pulse signal, which is converted into an infrared light signal by the shared infrared transmitter module and transmitted to the wireless microphone; the microphone infrared receiver module converts the received infrared light signal into a modulated pulse signal, the microphone control module decodes the modulated pulse signal and adjusts its own frequency to match the receiver, thus completing infrared frequency pairing; If frequency pairing is not required, the infrared frequency pairing mode is turned off and the gesture recognition mode is switched to: The receiver control module outputs a fixed frequency pulse signal, which is converted into an infrared light signal by the shared infrared transmitting module and then transmitted; when a gesture or obstacle approaches the shared infrared transmitting module, the infrared light signal is reflected to the receiver infrared receiving module. The infrared receiving module converts the received infrared light signal into a DC signal. The receiver control module detects the amplitude change of the DC signal to determine the movement trajectory of the gesture or obstacle, thereby realizing gesture recognition.

2. The method for a wireless microphone receiver that combines infrared frequency pairing and gesture recognition according to claim 1, characterized in that, The shared infrared emitting module includes an amplifier circuit and an infrared emitting tube, and the output I / O port of the receiver control module is connected to the infrared emitting tube via the amplifier circuit; the receiver infrared receiving module includes an infrared receiving tube, an amplifier circuit, and a rectifier and filter circuit, and the receiver infrared receiving tube is connected to the ADC input I / O port of the receiver control module in sequence via the amplifier circuit and the rectifier and filter circuit.

3. The method for a wireless microphone receiver that combines infrared frequency pairing and gesture recognition according to claim 2, characterized in that, The infrared emitting tube and the infrared receiving tube are spaced 10-100mm apart.

4. A method for a shared wireless microphone receiver for infrared frequency pairing and gesture recognition according to claim 2 or 3, characterized in that, The infrared receiver tube and the infrared receiver tube are infrared pairs with a diameter of 3mm or 5mm.

5. A method for a shared wireless microphone receiver for infrared frequency pairing and gesture recognition according to claim 1, 2, or 3, characterized in that, Both the receiver control module and the microphone control module use an MCU with an ADC detection pin and an I / O port, or an integrated circuit with an I / O port and an ADC detection pin.

6. A method for a shared wireless microphone receiver for infrared frequency pairing and gesture recognition according to claim 1, 2, or 3, characterized in that, The microphone infrared receiving module includes an infrared receiving tube and an amplification circuit, and the infrared receiving tube is connected to the modulation signal input I / O port of the microphone control module via the amplification circuit.

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