A smart wireless microphone

Abstract

This utility model relates to the field of microphone technology, specifically to an intelligent wireless microphone, comprising a battery module, a charging module, a control module, a first comparison module, and a second comparison module. The battery module includes a lithium battery, which is connected to the control module for power supply via a voltage regulator module. The charging module charges the lithium battery. When the lithium battery voltage is lower than a first voltage, the first comparison module outputs an alert signal to the alert module. When the lithium battery voltage is lower than a second voltage, the second comparison module outputs a power-off signal to the voltage regulator module, causing the control module to lose power. The battery module also includes a battery protection chip that disconnects the lithium battery's discharge circuit when the lithium battery voltage is lower than a third voltage, where the first voltage is greater than the second voltage, and the second voltage is greater than the third voltage. This utility model provides an intelligent wireless microphone that is rechargeable, highly intelligent, provides low battery alerts, prioritizes power supply, and prevents over-discharge.

Description

Technical Field

[0001] This utility model relates to the field of microphone technology, specifically to an intelligent wireless microphone. Background Technology

[0002] In a campus environment, wireless microphones are core equipment for teaching, meetings, and lectures, and their stability directly affects the smooth running of these activities. However, currently widely used traditional wireless microphones still have certain shortcomings: 1. Outdated power supply: Traditional wireless microphones use ordinary batteries for power, which do not have a charging function. The batteries need to be replaced every time they are depleted. Moreover, they do not have a low battery indicator function, which often leads to insufficient power causing the microphone to stop working and thus affecting the normal operation of the event. 2. Low level of intelligence: Traditional wireless microphones generally only have wireless transmission modules such as radio frequency chips to transmit audio signals, but they do not have a core controller and cannot realize intelligent functions such as display, anti-loss, and interaction. Utility Model Content

[0003] This invention addresses the technical problems of outdated power supply methods and low intelligence in existing microphones by providing an intelligent wireless microphone. The microphone includes a battery module and a charging module, allowing it to be charged when the battery is low. It also features high intelligence, low battery alerts, priority power supply, and over-discharge prevention.

[0004] The technical solution adopted in this utility model is as follows: A smart wireless microphone, comprising: A battery module, the battery module including at least one lithium battery, the lithium battery being capable of powering a wireless transmitting module; A charging module, wherein the charging module is at least used to charge the lithium battery; The control module is provided with power from the lithium battery, which is connected to the control module via a voltage regulator module. The first comparison module is used to compare the voltage of the lithium battery with a first voltage. When the voltage of the lithium battery is less than the first voltage, an alert signal is output to the alert module for reminder. The second comparison module is used to compare the voltage of the lithium battery with a second voltage. When the voltage of the lithium battery is less than the second voltage, a power-off signal is output to the voltage regulator module, causing the control module to lose power. The battery module also includes a battery protection chip. When the voltage of the lithium battery is lower than a third voltage, the battery protection chip disconnects the discharge circuit of the lithium battery. The first voltage is greater than the second voltage, and the second voltage is greater than the third voltage.

[0005] Furthermore, the battery module includes two lithium batteries and two battery protection chips; The battery module further includes a first diode, a second diode, a third diode, and a fourth diode. The positive terminal of the first lithium battery is connected to the cathode of the first diode, and the positive terminal of the second lithium battery is connected to the cathode of the second diode. The anode of the first diode is connected to the anode of the second diode and forms a battery input terminal. The positive terminal of the first lithium battery is also connected to the anode of the third diode, and the positive terminal of the second lithium battery is also connected to the anode of the fourth diode. The cathode of the third diode is connected to the cathode of the fourth diode and forms a battery output terminal.

[0006] Furthermore, the first diode, the second diode, the third diode, and the fourth diode are all Schottky diodes.

[0007] Furthermore, the control module includes a control chip, the voltage regulator module includes a voltage regulator chip, the voltage regulator chip is used to convert the voltage of the lithium battery into a first operating voltage for the control chip, and the output terminal of the second comparison module is connected to the enable terminal of the voltage regulator chip.

[0008] Furthermore, the first comparison module includes a first comparator, the negative input terminal of the first comparator is connected to the battery output terminal of the lithium battery, the positive input terminal of the first comparator is connected to the first terminal of the first voltage divider resistor and the second terminal of the second voltage divider resistor, the second terminal of the first voltage divider resistor is grounded, the first terminal of the second voltage divider resistor is connected to the second operating voltage, and the output terminal of the first comparator is connected to the reminder module. The second comparison module includes a second comparator. The positive input terminal of the second comparator is connected to the battery output terminal of the lithium battery. The negative input terminal of the second comparator is connected to the first terminal of the third voltage divider resistor and the second terminal of the fourth voltage divider resistor. The second terminal of the third voltage divider resistor is grounded. The first terminal of the fourth voltage divider resistor is connected to the second operating voltage. The output terminal of the second comparator is connected to the voltage regulator module.

[0009] Furthermore, the intelligent wireless microphone also includes a boost module, which is used to boost the voltage of the lithium battery to a second operating voltage for the first comparison module and the second comparison module.

[0010] Furthermore, the reminder module includes at least a vibration motor.

[0011] Furthermore, the reminder module also includes a DIP switch, one end of which is connected to the output terminal of the first comparison module, the other end of which is connected to the first terminal of the vibration motor, and the second terminal of the vibration motor is grounded.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, the intelligent wireless microphone of this utility model is equipped with a battery module and a charging module, which can be charged when the power is low, making it more convenient; the intelligent wireless microphone also includes a control module, which can be intelligently expanded, such as adding anti-loss function, adding display screen, etc., making it more intelligent; the intelligent wireless microphone is also equipped with a first comparison module, a second comparison module and a battery protection chip, which can monitor and compare the power of the microphone in stages when the microphone is working, thereby realizing the purpose of charging reminder, priority power supply and prevention of over-discharge. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a block diagram of the working mechanism of the intelligent wireless microphone of this utility model; Figure 2 This is a schematic diagram of the battery module of this utility model; Figure 3 This is a schematic diagram of the charging module of this utility model; Figure 4 This is a schematic diagram of the control module of this utility model; Figure 5 This is a schematic diagram of the principle of the first comparison module of this utility model; Figure 6 This is a schematic diagram of the principle of the second comparison module of this utility model; Figure 7 This is a schematic diagram of the principle of the reminder module of this utility model; Figure 8 This is a schematic diagram of the voltage regulator module of this utility model; Figure 9 This is a schematic diagram of the boost module of this utility model; Figure 10 This is a schematic diagram of the structure of the erasable read-only memory of this utility model; Figure 11 This is a schematic diagram of the positioning module of this utility model; Figure 12 This is a schematic diagram of the positioning button of this utility model. Detailed Implementation

[0015] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] Traditional wireless microphones typically include a pickup module, an audio processing module, and a wireless transmission module. The pickup module converts the user's voice into an electrical signal, the audio processing module amplifies, reduces noise, and optimizes the electrical signal, and the wireless transmission module sends the processed audio signal to a receiver, which then plays the audio through a speaker.

[0019] like Figures 1-12 As shown, this embodiment provides an intelligent wireless microphone, which, in addition to the aforementioned conventional modules, also includes a battery module, a charging module, and a control module. The battery module includes at least one lithium battery, which is used to power, for example, the wireless transmitting module and the audio processing module. The lithium battery also uses a voltage regulator module to convert its voltage into a suitable voltage to power the control module. The charging module is used to charge the lithium battery.

[0020] Furthermore, the intelligent wireless microphone in this embodiment also includes a first comparison module and a second comparison module. The first comparison module compares the voltage of the lithium battery with a first voltage. When the lithium battery voltage is lower than the first voltage, it outputs a reminder signal to a reminder module, which then uses vibration, sound, or light to remind the user to charge the battery in time. The second comparison module compares the voltage of the lithium battery with a second voltage. When the lithium battery voltage is lower than the second voltage, it outputs a power-off signal to the voltage regulator module, for example, controlling the voltage regulator module to stop working, causing the control module to lose power, thereby concentrating power to the wireless transmission module and the audio processing module, so that the remaining power can meet the user's current teaching or meeting activities as much as possible. Furthermore, the battery module also includes a battery protection chip. When the lithium battery voltage is lower than a third voltage, the battery protection chip disconnects the lithium battery's discharge circuit, stopping the lithium battery from discharging and preventing damage from over-discharge.

[0021] The first voltage is greater than the second voltage, the second voltage is greater than the third voltage, and the model and size of the lithium battery can be selected as needed; for example, the first voltage can be set to 3.7V, the second voltage to 3.5V, and the third voltage to 2.4V. When the lithium battery is fully charged, its voltage is approximately 4.1V. When the lithium battery voltage drops below the first voltage (3.7V), it indicates that the battery's charge is low, and the reminder module alerts the user to charge it promptly. When the lithium battery voltage further drops below the second voltage (3.5V), it indicates that the battery is severely depleted, and the voltage regulator module cuts off the power to the control module, allowing the remaining charge to be used primarily for basic functions such as the audio processing module and the wireless transmission module. When the lithium battery voltage further drops below the third voltage (2.4V), the discharge circuit of the lithium battery is cut off to prevent over-discharge and protect the battery.

[0022] Thus, the intelligent wireless microphone provided in this embodiment, compared with the prior art, is equipped with a battery module and a charging module, which can be charged when the power is low, making it more convenient; the intelligent wireless microphone also includes a control module, which can be intelligently expanded, such as adding anti-loss function, adding display screen, etc., making it more intelligent; the intelligent wireless microphone is also equipped with a first comparison module, a second comparison module and a battery protection chip, which can monitor and compare the power of the microphone in stages when the microphone is working, thereby achieving the purpose of charging reminder, priority power supply and prevention of over-discharge, etc. like Figure 2As shown, the battery module in this embodiment includes two lithium batteries connected in parallel, namely a first lithium battery U1 and a second lithium battery U2. Correspondingly, it includes two battery protection chips, namely a first battery protection chip U3 and a second battery protection chip U4. The first battery protection chip U3 and the second battery protection chip U4 can be of the model number DW06D, but are not limited to it. They have functions to prevent overcharging, over-discharging, and overcurrent. Specifically, the chip has two MOSFETs internally. When the voltage is higher than 4.2V, the first MOSFET turns off, stopping charging; when the voltage is lower than 2.4V, the second MOSFET turns off, stopping discharging; when the current exceeds 3.6A, both the first and second MOSFETs turn off, stopping charging and discharging.

[0023] Furthermore, the battery module also includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. The positive terminal of the first lithium battery U1 is connected to the cathode of the first diode D1, and the positive terminal of the second lithium battery U2 is connected to the cathode of the second diode D2. The anodes of the first diode D1 and the second diode D2 are connected to form the battery input terminal VC. The two lithium batteries can be charged through the battery input terminal VC, and the first and second diodes D1 and D2 prevent reverse current flow. Similarly, the positive terminal of the first lithium battery U1 is also connected to the anode of the third diode D3, and the positive terminal of the second lithium battery U2 is also connected to the anode of the fourth diode D4. The cathodes of the third diode D3 and the fourth diode D4 are connected to form the battery output terminal VIN. The two lithium batteries can be discharged through the battery output terminal VIN, and the third and fourth diodes D3 and D4 prevent reverse current flow. Preferably, the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 are of the same type. Preferably, the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 are all Schottky diodes. Compared with ordinary diodes, Schottky diodes have a lower forward voltage drop, for example, a model with a voltage drop of 0.1V or lower can be selected, so that the voltage supplied to the lithium battery can be higher and the power consumption is lower. Moreover, Schottky diodes have a stronger current carrying capacity, which facilitates fast charging.

[0024] like Figure 3 As shown, the charging module in this embodiment includes a charging chip U5 and its peripheral circuitry. The charging chip U5 is preferably a TC4056A, with an input voltage of -0.3V to 8V, for example, 5V, powered by an external battery adapter. The output charging voltage is 4.2V, and the charging current can reach 1000mA. With two lithium batteries, it can achieve high-current fast charging. In this embodiment, the two lithium batteries are of the same model, and the capacity of each lithium battery is preferably 650mAh to 2000mAh.

[0025] like Figure 5 As shown, the first comparison module in this embodiment includes a first comparator U7. The negative input terminal of the first comparator U7 is connected to the battery output terminal VIN of two lithium batteries. The positive input terminal of the first comparator U7 is connected to the first terminal of the first voltage divider resistor R31 and the second terminal of the second voltage divider resistor R32. The second terminal of the first voltage divider resistor R31 is grounded, and the first terminal of the second voltage divider resistor R32 is connected to a second operating voltage, such as 5V. The output terminal of the first comparator U7 is connected to the reminder module via a first output resistor R33. A first reference voltage is obtained by dividing the voltage between the first voltage divider resistor R31 and the second voltage divider resistor R32. Preferably, the first reference voltage can be selected as the first voltage minus the voltage drop of the third diode D3 or the fourth diode D4. The model of the first comparator U7 can be selected, but is not limited to, NE5532DR.

[0026] like Figure 7 As shown, the reminder module includes a vibration motor U9. The first terminal of the vibration motor U9 is connected to the output terminal of the first comparator U7 via a current-limiting resistor R41, and the second terminal of the vibration motor U9 is grounded. When the lithium battery voltage is lower than a first voltage, the first comparator U7 outputs a high level, such as 5V, to drive the vibration motor U9. In other embodiments, reminders can also be given through sound, light, or other means. Furthermore, the reminder module also includes a DIP switch DIP1. One end of the DIP switch DIP1 is connected to the output terminal of the first comparator U7 via the current-limiting resistor R41, and the other end of the DIP switch DIP1 is connected to the first terminal of the vibration motor U9. When a user is using the smart wireless microphone, if the lithium battery power is lower than the first voltage, the vibration motor U9 will activate to provide a reminder. At this time, the user can charge the microphone. During charging, the voltage at the battery output terminal VIN will immediately rise above the first voltage, and the vibration motor U9 will stop working and will no longer provide a reminder. Alternatively, the user can choose not to charge the microphone temporarily, for example, after the current lecture or meeting ends. In this case, the user can press the DIP switch DIP1 to disconnect the circuit of the vibration motor U9, causing the vibration motor U9 to stop working. The DIP switch DIP1 can be manually reset when charging is desired.

[0027] like Figure 4 As shown, the control module in this embodiment includes a control chip U6 and its peripheral circuits. The control chip U6 can be, but is not limited to, an STM32F103C8T6, and can be selected according to the specific intelligent functions required. Figure 8As shown, the voltage regulator module includes a voltage regulator chip U10. The voltage regulator chip U10 converts the voltage at the battery output terminal VIN of the lithium battery into a first operating voltage, for example, 3V, for the control chip U6. The model of the voltage regulator chip U10 can be, but is not limited to, ADP2108AUJZ-3.0-R7. The voltage regulator chip U10 includes an enable terminal EN, which is connected to the output terminal of the second comparator module. When the enable terminal EN is high, the voltage regulator chip U10 operates; when the enable terminal EN is low, the voltage regulator chip U10 stops operating.

[0028] like Figure 6 As shown, the second comparison module in this embodiment includes a second comparator U8. The positive input terminal of the second comparator U8 is connected to the battery output terminal VIN of the lithium battery. The negative input terminal of the second comparator U8 is connected to the first terminal of the third voltage divider resistor R34 and the second terminal of the fourth voltage divider resistor R35. The second terminal of the third voltage divider resistor R34 is grounded, and the first terminal of the fourth voltage divider resistor R35 is connected to a second operating voltage, such as 5V. The output terminal of the second comparator U8 is connected to the enable terminal EN of the voltage regulator chip U10 via the second output resistor R36. A second reference voltage is obtained by voltage division through the third voltage divider resistor R34 and the fourth voltage divider resistor R35. Preferably, the second reference voltage can be selected as the second voltage minus the voltage drop of the third diode D3 or the fourth diode D4. The model of the second comparator U8 can be selected, but is not limited to, NE5532DR. When the user continues to use the smart wireless microphone, if the lithium battery voltage is lower than the second voltage, the second comparator U8 outputs a low level to the enable terminal EN of the voltage regulator chip U10, the voltage regulator chip U10 stops working, and the control chip U6 is de-energized, so that the remaining power can be concentrated on basic modules such as the wireless transmission module and the audio processing module.

[0029] like Figure 10 As shown, the smart wireless microphone in this embodiment also includes an erasable read-only memory (RROM) U12. This RROM U12 can be used to number and label the smart wireless microphone, giving it a serial number. When charging it with a battery adapter, the serial number can be read, and the charging usage status of the device can be recorded. In actual use, it is common for smart wireless microphones to be borrowed between rooms. The serial number of each smart wireless microphone can be pre-assigned to a specific room. By reading the serial number of each smart wireless microphone, the corresponding room information can be easily determined, thus facilitating the return of each smart wireless microphone to its designated location. The RROM U12 can be, but is not limited to, a 24LC01B / SN model.

[0030] like Figure 11-12As shown, the intelligent wireless microphone in this embodiment also includes a positioning module. The positioning module includes an antenna U13, a radio frequency low-noise amplifier U14, and a GPS positioning chip U15. The antenna U13 receives electromagnetic wave signals from satellites and converts these signals into a processable current. The radio frequency low-noise amplifier U14 amplifies the signals collected by the antenna U13. The GPS positioning chip U15 converts and calculates the amplified signals to ultimately determine the location information. The radio frequency low-noise amplifier U14 can be, but is not limited to, the AT2659, and the GPS positioning chip U15 can be, but is not limited to, the ATGM336H-5N31. The GPS positioning chip U15 is connected to the control chip U6 via a data transmission serial port TXD and a data reception serial port RXD. The positioning module also includes a positioning button KEY2. One end of the positioning button KEY2 is connected to the output terminal of a voltage regulator module (e.g., 3V) via a resistor R91. Another end of the positioning button KEY2 is also connected to the control chip U6, and the other end of the positioning button KEY2 is grounded. In this embodiment, the anti-loss range of the smart wireless microphone can be preset through the control chip U6, for example, a circle with a certain radius centered on the positioning point. When the positioning button KEY2 is pressed for a certain period of time, a low-level signal is output to the control chip U6. The control chip U6 records the current location information, which is the positioning point, and determines the final anti-loss range based on the radius of the circle. When the smart wireless microphone goes out of this range, an alarm can be triggered by a buzzer or other means to remind the user to return it in time and prevent the user from accidentally taking it away. In addition to adding positioning function, the smart wireless microphone of this embodiment can also be expanded with other intelligent functions such as display and interaction as needed.

[0031] like Figure 9 As shown, the intelligent wireless microphone in this embodiment also includes a boost module. The boost module boosts the voltage at the battery output terminal VIN of the lithium battery to a second operating voltage, such as 5V, to power the first comparator U7, the second comparator U8, and the erasable read-only memory U12. The boost module includes a boost chip U11, the model of which can be selected, but is not limited to, PW5410A.

[0032] In summary, the intelligent wireless microphone provided in this embodiment is equipped with a battery module and a charging module, which can charge when the power is low. In addition, it has the characteristics of high intelligence, low power reminder, priority power supply and prevention of over-discharge.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An intelligent wireless microphone, characterized by include: A battery module, the battery module including at least one lithium battery, the lithium battery being capable of powering a wireless transmission module; A charging module, wherein the charging module is used to charge the lithium battery; The control module is provided with power from the lithium battery, which is connected to the control module via a voltage regulator module. The first comparison module is used to compare the voltage of the lithium battery with a first voltage. When the voltage of the lithium battery is less than the first voltage, an alert signal is output to the alert module for reminder. The second comparison module is used to compare the voltage of the lithium battery with a second voltage. When the voltage of the lithium battery is less than the second voltage, a power-off signal is output to the voltage regulator module, causing the control module to lose power. The battery module also includes a battery protection chip. When the voltage of the lithium battery is lower than a third voltage, the battery protection chip disconnects the discharge circuit of the lithium battery. The first voltage is greater than the second voltage, and the second voltage is greater than the third voltage.

2. The intelligent wireless microphone of claim 1, wherein, The battery module includes two lithium batteries and two battery protection chips; The battery module further includes a first diode, a second diode, a third diode, and a fourth diode. The positive terminal of the first lithium battery is connected to the cathode of the first diode, and the positive terminal of the second lithium battery is connected to the cathode of the second diode. The anode of the first diode is connected to the anode of the second diode and forms a battery input terminal. The positive terminal of the first lithium battery is also connected to the anode of the third diode, and the positive terminal of the second lithium battery is also connected to the anode of the fourth diode. The cathode of the third diode is connected to the cathode of the fourth diode and forms a battery output terminal.

3. The intelligent wireless microphone of claim 2, wherein, The first diode, the second diode, the third diode, and the fourth diode are all Schottky diodes.

4. The intelligent wireless microphone of claim 3, wherein, The control module includes a control chip, and the voltage regulator module includes a voltage regulator chip. The voltage regulator chip is used to convert the voltage of the lithium battery into a first operating voltage for the control chip. The output terminal of the second comparison module is connected to the enable terminal of the voltage regulator chip.

5. The intelligent wireless microphone of claim 4, wherein, The first comparison module includes a first comparator, the negative input terminal of the first comparator is connected to the battery output terminal of the lithium battery, the positive input terminal of the first comparator is connected to the first terminal of the first voltage divider resistor and the second terminal of the second voltage divider resistor, the second terminal of the first voltage divider resistor is grounded, the first terminal of the second voltage divider resistor is connected to the second operating voltage, and the output terminal of the first comparator is connected to the reminder module. The second comparison module includes a second comparator. The positive input terminal of the second comparator is connected to the battery output terminal of the lithium battery. The negative input terminal of the second comparator is connected to the first terminal of the third voltage divider resistor and the second terminal of the fourth voltage divider resistor. The second terminal of the third voltage divider resistor is grounded. The first terminal of the fourth voltage divider resistor is connected to the second operating voltage. The output terminal of the second comparator is connected to the voltage regulator module.

6. The intelligent wireless microphone of claim 5, wherein, The intelligent wireless microphone also includes a boost module, which is used to boost the voltage of the lithium battery to a second operating voltage for the first comparison module and the second comparison module.

7. The intelligent wireless microphone of claim 6, wherein, The reminder module includes at least a vibration motor.

8. The intelligent wireless microphone of claim 7, wherein, The reminder module also includes a DIP switch, one end of which is connected to the output terminal of the first comparison module, the other end of which is connected to the first terminal of the vibration motor, and the second terminal of the vibration motor is grounded.

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