Wireless microphone activation system and method

Abstract

This invention belongs to the field of microphone technology and relates to a wireless microphone activation system and method. The system includes: a transmitter for modulating voice signals onto radio waves of different frequencies and transmitting them; the transmitter includes a first MCU, a first lithium battery, a voltage detection module, and a load electrically connected to each other; the transmitter has a first spring-loaded contact. A receiver is used to receive the radio waves containing voice signals emitted by the transmitter and demodulate the voice signals; the receiver includes a second MCU, a second lithium battery, and a load detection module electrically connected to each other; the receiver has a second spring-loaded contact, the second spring-loaded contact being positioned to match the first spring-loaded contact. When not in use, one or more transmitters are magnetically attached to the receiver and connected via the spring-loaded contact. In use, simply disconnecting one or more transmitters from the receiver automatically powers them on, providing immediate and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of microphone technology, and more specifically, to a wireless microphone activation system and method. Background Technology

[0002] A wireless microphone generally refers to a wireless microphone. A wireless microphone consists of several pocket transmitters (which can be carried in a pocket and have an output power of approximately 0.01W) and a central receiver. Each pocket transmitter emits a voice signal, and the central receiver can simultaneously receive the voice signals emitted by all the pocket transmitters. It is suitable for use on stages, lecterns, and similar occasions.

[0003] In existing wireless microphones, the transmitter (TX) and receiver (RX) are both turned off when not in use. When in use, the transmitter and receiver need to be turned on separately, usually by pressing and holding the power button. Taking a dual-device product with two transmitters and one receiver as an example, it is necessary to press and hold the power button on all three products to turn them on, which is very cumbersome. Summary of the Invention

[0004] The technical problem this invention aims to solve is that in existing wireless microphones, both the transmitter and receiver are switched off when not in use, requiring separate power-on for use, which is cumbersome. To address these shortcomings, this invention provides a wireless microphone activation system, comprising:

[0005] A transmitter for modulating voice signals onto radio waves of different frequencies and transmitting them, comprising a first MCU, a first lithium battery, a voltage detection module and a load electrically connected together, wherein the transmitter is provided with a first spring-loaded contact.

[0006] A receiver is used to receive radio waves containing voice signals emitted by the transmitter and demodulate the voice signals. It includes a second MCU, a second lithium battery and a load detection module electrically connected to each other. The receiver is provided with a second spring-loaded contact, which is adapted to the position of the first spring-loaded contact.

[0007] Preferably, the voltage detection module includes: pin 11 of the first MCU is connected to one end of resistor R5, one end of resistor R6, and one end of resistor R7 respectively, and pin 22 of the first MCU is connected to one end of capacitor C3.

[0008] Preferably, the load detection module includes:

[0009] The positive terminal of the second lithium battery is connected to one end of resistor R1, the non-inverting input of differential amplifier U1A is connected to it, the other end of resistor R1 is connected to the inverting input of differential amplifier U1A, and the output of differential amplifier U1A is connected to the inverting input of comparator U1B.

[0010] Preferably, the receiver includes:

[0011] Pin 22 of the second MCU is connected to one end of capacitor C1, one end of resistor R1, and the non-inverting input of differential amplifier U1A. The V+ terminal of differential amplifier U1A is connected to one end of capacitor C2. The output terminal of differential amplifier U1A is connected to the inverting input of comparator U1B. The reference voltage terminal of comparator U1B is connected to one end of resistor R3 and one end of resistor R2. The output terminal of comparator U1B is connected to one end of resistor R4 and pin 11 of the second MCU.

[0012] Preferably, the first MCU includes an HC32L series MCU or an STM32L series MCU.

[0013] Preferably, the transmitter includes:

[0014] Pin 11 of the first MCU is connected to one end of resistor R6 and one end of resistor R5 respectively. The other end of resistor R5 is connected to one end of resistor R7. Pin 22 of the first MCU is connected to one end of capacitor C3.

[0015] Preferably, the second MCU includes an HC32L series MCU or an STM32L series MCU.

[0016] Preferably, the transmitter includes multiple transmitters.

[0017] Preferably, the first spring pin contact is provided in multiple locations, each located on one side of the transmitter, and the second spring pin contact is provided in multiple locations, each located on one side of the receiver.

[0018] On the other hand, the present invention provides a wireless microphone activation method, comprising the above-mentioned wireless microphone activation system, including the following steps:

[0019] Disconnecting the transmitter from the receiver will automatically power on and activate both the transmitter and receiver.

[0020] The wireless microphone activation system and method of the present invention have the following advantages: when not in use, one or more transmitters are magnetically attached to the receiver via spring-loaded contacts and connected via spring-loaded contacts, making them easy to store; when needed, one or more transmitters and receivers can be automatically turned on by simply disconnecting one or more transmitters from the receiver, making them readily available and convenient. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0022] Figure 1 This is a schematic diagram of the wireless microphone activation system of the present invention;

[0023] Figure 2 This is a circuit diagram of the load detection module in the wireless microphone activation system of the present invention;

[0024] Figure 3 This is a circuit diagram of the voltage detection module in the wireless microphone activation system of the present invention;

[0025] Figure 4 This is a circuit diagram of the receiver section in the wireless microphone activation system of the present invention;

[0026] Figure 5 This is a schematic diagram illustrating the working principle of the wireless microphone activation system of this invention. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0030] Example 1

[0031] Please see Figure 1 This is a schematic diagram of the wireless microphone activation system of the present invention. Figure 1 As shown, the wireless microphone activation system provided in the first embodiment of the present invention includes at least a transmitter 1 for modulating voice signals into radio waves of different frequencies and transmitting them, including a first MCU 11, a first lithium battery 12, a voltage detection module 13 and a load 14 electrically connected, and also includes a first spring contact 15.

[0032] Receiver 2 is used to receive voice signals of different operating frequencies emitted by transmitter 1. It includes a second MCU 21, a second lithium battery 22 and a load detection module 23 connected by electrical connection. It also includes a second spring contact 24, which is adapted to the position of the first spring contact to facilitate the electrical connection between the second spring contact and the first spring contact.

[0033] Please see Figure 2 This is a circuit diagram of the load detection module in the wireless microphone activation system of the present invention. Figure 2 As shown, the load detection module circuit includes: pin 11 of the first MCU U3A is connected to one end of resistor R5, one end of resistor R6, and one end of resistor R7 respectively; pin 22 of the first MCU U3A is connected to one end of capacitor C3. Ui is divided into Udt by R5 and R6, and the voltage divider resistor values ​​ensure that Udt is within the safe voltage range of the first MCU U3A GPIO; when the transmitter and receiver are magnetically connected, Ui changes from 0V to Uo, and the corresponding Udt changes from low level to high level, generating a rising edge on GPIO0 of the first MCU U3A; the rising edge on GPIO0 is replaced by the first MCU U3A. The first MCU U3A includes, but is not limited to, HC32L series MCUs or STM32L series MCUs. In this embodiment, the first MCU U3A is selected as STM32L4x1.

[0034] Please see Figure 3, which is the circuit diagram of the voltage detection module in the wireless microphone activation system of the present invention. As Figure 3 shown, the voltage detection module includes: the positive electrode of the second lithium battery B3 is respectively connected to one end of the resistor R1 and the non-inverting input terminal of the differential amplifier U1A, the other end of the resistor R1 is connected to the inverting input terminal of the differential amplifier U1A, and the output terminal of the differential amplifier U1A is connected to the inverting input terminal of the comparator U1B.

[0035] In specific implementation, the resistance value of the sampling resistor R1 is R, the gain of the differential amplifier U1A is G. Assuming that the current flowing through the sampling resistor when there is a load is I, the output voltage of the differential amplifier U1A is G*R*I. Set the reference voltage Ref of the comparator U1B to 0.5*G*R*I. When the transmitter is magnetically adsorbed on the receiver product, G*R*I > Ref, and the comparator U1B outputs a low level. When the transmitter is disconnected from the receiver, 0 ≈ G*R*I < Ref, and the comparator U1B outputs a high level. The uA-level load module is a uA-level constant current source, and it can also be replaced by a megaohm-level resistor. uA-level usually refers to a static current below 0.1 mA, that is, about 1 - 100 μA, usually about 10 μA.

[0036] Please refer to Figure 4 , which is the circuit diagram of the receiver part in the wireless microphone activation system of the present invention. As Figure 4 shown, pin 22 of the second MCU U606A is respectively connected to one end of the capacitor C1, one end of the resistor R1, and the non-inverting input terminal of the differential amplifier U1A. The V+ terminal of the differential amplifier U1A is connected to one end of the capacitor C2. The output terminal of the differential amplifier U1A is connected to the inverting input terminal of the comparator U1B. The reference voltage terminal of the comparator U1B is respectively connected to one end of the resistor R3 and one end of the resistor R2. The output terminal of the comparator U1B is respectively connected to one end of the resistor R4 and pin 11 of the second MCU U606A. The second MCU U606A includes but is not limited to the HC32L series MCU or the STM32L series MCU. In this embodiment, the second MCU U606A is selected as STM32L4x1.

[0037] In specific implementation, there can be multiple transmitters.

[0038] Please refer to Figure 5 , which is the working principle diagram of the wireless microphone activation system of the present invention. As Figure 5As shown, the receiver includes a built-in lithium battery, a low-power load detection module, and an MCU (microprocessor unit). The transmitter includes a built-in lithium battery, a uA-level load module, a voltage detection module, and an MCU. Both the receiver and transmitter have two spring-load contacts. The transmitter's two spring-load contacts are a first spring-load contact 151 and a second spring-load contact 152, respectively located on one side of the transmitter. Multiple first spring-load contacts 151 and multiple second spring-load contacts 152 can be provided; in this embodiment, two first spring-load contacts 151 and two second spring-load contacts 152 are provided. The receiver's two spring-load contacts are a first spring-load contact 241 and a second spring-load contact 242, respectively located on both sides of the receiver. The position of the transmitter's first spring-loaded contact 151 is adapted to the position of the receiver's first spring-loaded contact 241, facilitating the establishment of an electrical connection between them. Similarly, the position of the transmitter's second spring-loaded contact 152 is adapted to the position of the receiver's second spring-loaded contact 242, facilitating the establishment of an electrical connection between them. The microphone contains a magnet, ensuring good contact and electrical connection when the transmitter is connected to the receiver via the spring-loaded contacts.

[0039] The receiver has a built-in lithium battery that powers the low-power load detection module and the MCU. The low-power load detection module is used to detect whether there is a load on the output power supply Uo. When there is no load, Vr outputs a high level, and when there is a load, Vr outputs a low level. The MCU controls the receiver's power-on and power-off logic through the output level of Vr.

[0040] The transmitter has a built-in lithium battery that powers the MCU. When Ui = Uo, the uA-level load module provides a current loop of about 5uA (a relatively large load) to Ui. This is used by the receiver's internal low-power load detection module to detect whether there is a load. When the voltage detection module detects a voltage input, Vt outputs a low level. When Ui is floating, the voltage detection module does not detect a voltage input, and Vt outputs a high level. The MCU controls the transmitter's power-on and power-off logic through the output level of Vt.

[0041] When the transmitter is magnetically attached to the receiver, Ui = Uo, Vr outputs a low level, Vt outputs a low level, and the MCU inside the receiver and transmitter controls the receiver and transmitter to shut down. The MCU inside the receiver and transmitter both enter a low-power sleep mode.

[0042] When the transmitter and receiver are disconnected, Ui is left floating, and the Vr output changes from low to high, triggering the receiver's internal MCU to wake up. The MCU then controls the receiver to power on automatically. The Vtr output changes from low to high, triggering the transmitter's internal MCU to wake up. The MCU then controls the transmitter to power on automatically, successfully activating the wireless microphone.

[0043] The beneficial effects of this invention, through the design of the above embodiments, are as follows: By employing a transmitter and a receiver, the transmitter is used to modulate the voice signal onto radio waves of different frequencies and transmit it. It includes a first MCU, a first lithium battery, a voltage detection module, and a load connected electrically. The transmitter has a first spring-loaded contact. The receiver is used to receive the radio waves containing the voice signal emitted by the transmitter and demodulate the voice signal. It includes a second MCU, a second lithium battery, and a load detection module connected electrically. The receiver has a second spring-loaded contact, the position of which is adapted to the first spring-loaded contact. When not in use, one or more transmitters are connected to the receiver via spring-loaded contacts for easy storage. When needed, simply separate the transmitter (one or more) from the receiver, causing the transmitter and receiver to lose their magnetic connection. The spring-loaded contacts connecting the transmitter and receiver disconnect, and both the transmitter (one or more) and the receiver automatically power on, making it ready to use immediately and conveniently.

[0044] Example 2

[0045] A wireless microphone activation method, comprising a wireless microphone activation system as shown in Embodiment 1, includes the following steps:

[0046] Disconnecting the transmitter and receiver will automatically power them on and activate them.

[0047] Disconnecting the transmitter and receiver, using the loss of magnetic connection at the pin contacts as a standard, allows the Hall element and magnet to reflect changes in voltage levels, automatically activating the transmitter and receiver.

[0048] The beneficial effects of the present invention through the above embodiments are as follows: when not in use, one or more transmitters can be attached to the receiver via spring-loaded contacts and connected via spring-loaded contacts, making them easy to store; when needed, one or more transmitters can be disconnected from the receiver, and one or more transmitters and receivers will automatically turn on, making them ready to use immediately, convenient and quick.

[0049] This invention has been described with reference to specific embodiments, but those skilled in the art will understand that various changes and equivalent substitutions can be made without departing from the scope of the invention. Furthermore, numerous modifications can be made to this invention to suit specific applications without departing from its protection scope. Therefore, this invention is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the scope of the claims.

Claims

1. A wireless microphone activation system, characterized in that, include: A transmitter for modulating voice signals onto radio waves of different frequencies and transmitting them, the transmitter including a first MCU, a first lithium battery, a voltage detection module and a load electrically connected to each other, and the transmitter having a first spring contact. A receiver is used to receive radio waves containing voice signals emitted by the transmitter and demodulate the voice signals. The receiver includes a second MCU, a second lithium battery, and a load detection module electrically connected to each other. The receiver is provided with a second spring-loaded contact, which is adapted to the position of the first spring-loaded contact. The load detection module is used to detect whether there is a load at the output terminal of the first spring-loaded contact and output a first level signal to the second MCU according to the detection result. The second MCU is configured to control the switch of the receiver according to the first level signal. The positive terminal of the second lithium battery is connected to one end of resistor R1, the non-inverting input of differential amplifier U1A is connected to it, the other end of resistor R1 is connected to the inverting input of differential amplifier U1A, and the output of differential amplifier U1A is connected to the inverting input of comparator U1B. Pin 22 of the second MCU is connected to one end of capacitor C1, one end of resistor R1, and the non-inverting input of differential amplifier U1A. The V+ terminal of differential amplifier U1A is connected to one end of capacitor C2. The output terminal of differential amplifier U1A is connected to the inverting input of comparator U1B. The reference voltage terminal of comparator U1B is connected to one end of resistor R3 and one end of resistor R2. The output terminal of comparator U1B is connected to one end of resistor R4 and pin 11 of the second MCU. The voltage detection module includes: Pin 11 of the first MCU is connected to one end of resistor R5, one end of resistor R6, and one end of resistor R7, respectively. Pin 22 of the first MCU is connected to one end of capacitor C3. The transmitter includes: Pin 11 of the first MCU is connected to one end of resistor R6 and one end of resistor R5 respectively. The other end of resistor R5 is connected to one end of resistor R7. Pin 22 of the first MCU is connected to one end of capacitor C3.

2. The wireless microphone activation system according to claim 1, characterized in that, The first MCU includes either the HC32L series MCU or the STM32L series MCU.

3. The wireless microphone activation system according to claim 1, characterized in that, The second MCU includes either the HC32L series MCU or the STM32L series MCU.

4. The wireless microphone activation system according to any one of claims 1 to 3, characterized in that, The transmitters include multiple units.

5. The wireless microphone activation system according to claim 4, characterized in that: The first spring pin contact is provided in multiple locations, each located on one side of the transmitter. The second spring pin contact is provided in multiple locations, each located on one side of the receiver.

6. A method for activating a wireless microphone, characterized in that, A wireless microphone activation system as described in any one of claims 1 to 5 is provided, comprising the steps of: Disconnecting the transmitter from the receiver will automatically power on and activate both the transmitter and receiver.

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