Bluetooth speaker box networking system

Abstract

Disclosed in the present invention is a Bluetooth speaker box networking system. The Bluetooth speaker box networking system comprises a plurality of Bluetooth speaker units, which are in wireless communication connection with each other, wherein when being powered on, all the Bluetooth speaker units are set to be slave Bluetooth speakers by default; after any of the Bluetooth speaker units is connected to an external device by means of Bluetooth, the Bluetooth speaker unit is set to be a master Bluetooth speaker; all of the other slave Bluetooth speakers are connected to the master Bluetooth speaker, and turn off their own Bluetooth; and the master Bluetooth speaker synchronizes a received audio signal to all of the other slave Bluetooth speakers. The Bluetooth speaker box networking system realizes interconnection playback of a plurality of Bluetooth speaker units, can set a master-slave relationship between the Bluetooth speaker units on the basis of actual situations, and is convenient to operate. The plurality of Bluetooth speaker units can be connected according to user requirements, and the number and positions of the speaker units can be adaptively configured, such that a good expandability and flexibility are achieved, thereby providing a high-quality audio experience for a user.

Description

A Bluetooth speaker networking system Technical Field

[0001] The present invention relates to the technical field of smart speakers, and more particularly to a Bluetooth speaker networking system. Background Art

[0002] In recent years, with the rise of smart home technology, speakers have gradually become an indispensable part of people's home entertainment and life. More and more places are installing speakers to enhance the quality of audio playback.

[0003] Current smart speakers utilize an integrated body structure, housing a control chip, speaker, microphone, and other corresponding modules. These speakers utilize numerous key technologies to achieve their functionality. First and foremost is speaker technology, including the design of the diaphragm material, voice coil, and magnetic system, as well as the power and efficiency of the sound amplifier. Second is wireless communication technology, with speakers using Bluetooth, Wi-Fi, or other wireless protocols to connect to other devices. Furthermore, audio codec technology is used to process and transmit audio signals. However, power modules typically provide integrated power to each module, making it difficult to establish a consistent power supply system tailored to each module's specific needs.

[0004] Furthermore, existing technologies utilize audio DSP processors and power amplifier IC drivers to build a network for amplifiers and audio amplification, and traditional Bluetooth module technology can control devices through serial ports for data transmission. Furthermore, speakers are divided into two modules: master and slave. While the master mode can search for Bluetooth modules through Bluetooth devices and actively establish connections, the slave mode cannot actively establish connections, preventing multiple speakers from effectively connecting.

[0005] Therefore, how to design a Bluetooth speaker networking system to achieve more stable and diversified use of the speakers is a problem that technicians in this field urgently need to solve.

[0006] Summary of the Invention

[0007] In view of this, the present invention provides a Bluetooth speaker networking system, which improves the efficiency of the power amplifier module, the Bluetooth module, and the broadcast receiving module, so that it can work more stably and with higher quality when playing audio.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention provides a Bluetooth speaker networking system, comprising: a plurality of Bluetooth audio units connected to each other in wireless communication;

[0010] Among them, when all Bluetooth audio units are connected to the power supply, they are set as auxiliary Bluetooth audio units by default;

[0011] When any of the Bluetooth audio units is connected to an external device via Bluetooth, it is set as the host Bluetooth audio;

[0012] All other auxiliary Bluetooth speakers are connected to the host Bluetooth speaker and their own Bluetooth is turned off;

[0013] The host Bluetooth speaker synchronizes the received audio signal to all other auxiliary Bluetooth speakers.

[0014] Preferably, the Bluetooth audio unit comprises: a power module, a Bluetooth module, a broadcast receiving module, a power amplifier module and a speaker;

[0015] The power supply module includes: a first DC-DC converter and a second DC-DC converter; the first DC-DC converter is connected to the power amplifier module and is used to reduce the voltage to power the power amplifier module; the second DC-DC converter is connected to the Bluetooth module and the broadcast receiving module and is used to reduce the voltage to power the Bluetooth module and the broadcast receiving module;

[0016] The Bluetooth module is used to receive audio signals sent by an external device, and is connected to the broadcast receiving module to transmit the audio signals to the broadcast receiving module; the broadcast receiving module is used to determine the auxiliary mode and host mode of the Bluetooth speaker, and is connected to the power amplifier module to transmit the audio signals to the power amplifier module; the power amplifier module is connected to the speaker to drive the speaker to produce sound.

[0017] Preferably, when all Bluetooth audio units are powered on, the broadcast receiving module sets the local Bluetooth audio unit as the auxiliary Bluetooth audio unit;

[0018] When any one of the Bluetooth speakers is connected to the peripheral device via Bluetooth, the Bluetooth module sends a connection signal to the broadcast receiving module, and the broadcast receiving module receives the connection signal and sets the local Bluetooth speaker unit as the host Bluetooth speaker.

[0019] Preferably, when the auxiliary Bluetooth speaker detects the host signal, the broadcast receiving module of the auxiliary Bluetooth speaker sends a connection request to the broadcast receiving module of the host Bluetooth speaker, the broadcast receiving module of the host Bluetooth speaker verifies and confirms, and completes networking with the auxiliary Bluetooth speaker;

[0020] The broadcast receiving module of the host Bluetooth speaker synchronously sends the audio signal to the broadcast receiving modules of all the auxiliary Bluetooth speakers;

[0021] The broadcast receiving modules of the host Bluetooth speaker and all the auxiliary Bluetooth speakers synchronously send the audio signal to the power amplifier modules of the host Bluetooth speaker and all the auxiliary Bluetooth speakers; the power amplifier modules of the host Bluetooth speaker and all the auxiliary Bluetooth speakers drive the speakers to sound, completing the interconnected playback.

[0022] Preferably, the first DC-DC converter uses a chip model: SCT2630; the second DC-DC converter uses a chip model: XL1509; the Bluetooth module uses a chip model: BT8922B2; the broadcast receiving module uses a chip model: BT8962B5; the power amplifier module uses a chip model: TPA3110D2.

[0023] Preferably, the chip SCT2630 pin EN is connected to a resistor and the pin VIN is connected in parallel to an external power supply, the pin SW is connected to an inductor and a capacitor to form an output pin PVCC, and the output pin PVCC is connected to the chip TPA3110D2.

[0024] Preferably, the pin VIN of the chip XL1509 is connected to an external power supply, and the pin OUTPUT is connected to the inductor, diode and resistor to form the output pin VMCU, and the output pin VMCU is connected to the chip BT8922B2 and the chip BT8962B5.

[0025] Preferably, the DACR pin of the chip BT8922B2 is connected to the PB15 pin of the chip BT8962B5, and the DACL pin of the chip BT8922B2 is connected to the PB14 pin of the chip BT8962B5.

[0026] Preferably, the DACR pin of the chip BT8962B5 is connected to the LINP pin of the chip TPA3110D2, and the DACL pin of the chip BT8962B5 is connected to the PINP pin of the chip TPA3110D2.

[0027] Preferably, the BT_ANT pin of the chip BT8922B2 and the chip BT8962B5 is connected to a capacitor and an onboard antenna.

[0028] It can be seen from the above technical solution that compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0029] This Bluetooth speaker networking system enables interconnected playback of multiple Bluetooth speaker units, and can set the master-slave relationship of Bluetooth speaker units according to actual conditions, making it easy to operate. Multiple Bluetooth speaker units can be connected according to user needs, and speaker units can be added or removed at any time, enabling adaptive configuration of the number and location of speaker units. It has good scalability and flexibility, providing users with a high-quality audio experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0031] FIG1 is a schematic diagram of a Bluetooth speaker networking system provided by the present invention;

[0032] FIG2 is a structural diagram of a Bluetooth audio unit provided by the present invention;

[0033] FIG3 is a circuit diagram of the chip SCT2630 provided by the present invention;

[0034] FIG4 is a circuit diagram of the chip XL1509 provided by the present invention;

[0035] FIG5 is a circuit diagram of the chip BT8922B2 provided by the present invention;

[0036] FIG6 is a circuit diagram of the chip BT8962B5 provided by the present invention;

[0037] FIG7 is a circuit diagram of the chip TPA3110D2 provided by the present invention. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] As shown in FIG1 , this embodiment provides a Bluetooth speaker networking system, comprising: a plurality of Bluetooth audio units connected to each other in wireless communication;

[0040] Among them, when all Bluetooth audio units are connected to the power supply, they are set as auxiliary Bluetooth audio units by default;

[0041] When any of the Bluetooth audio units is connected to an external device via Bluetooth, it is set as the host Bluetooth audio;

[0042] All other auxiliary Bluetooth speakers are connected to the main Bluetooth speaker and their own Bluetooth is turned off;

[0043] The host Bluetooth speaker will synchronize the received audio signal to all other slave Bluetooth speakers.

[0044] This Bluetooth speaker networking system enables interconnected playback of multiple Bluetooth speaker units, and can set the master-slave relationship of Bluetooth speaker units according to actual conditions, making it easy to operate. Multiple Bluetooth speaker units can be connected according to user needs, and speaker units can be added or removed at any time, enabling adaptive configuration of the number and location of speaker units. It has good scalability and flexibility, providing users with a high-quality audio experience.

[0045] As shown in FIG2 , the Bluetooth audio unit in this embodiment includes: a power module, a Bluetooth module, a broadcast receiving module, a power amplifier module and a speaker;

[0046] The power supply module includes: a first DC-DC converter and a second DC-DC converter; the first DC-DC converter is connected to the power amplifier module and is used to reduce the voltage to power the power amplifier module; the second DC-DC converter is connected to the Bluetooth module and the broadcast receiving module and is used to reduce the voltage to power the Bluetooth module and the broadcast receiving module;

[0047] The Bluetooth module is used to receive audio signals sent by external devices, and is connected to the broadcast receiving module to transmit the audio signals to the broadcast receiving module; the broadcast receiving module is used to determine the slave mode and host mode of the Bluetooth speaker, and is connected to the power amplifier module to transmit the audio signals to the power amplifier module; the power amplifier module is connected to the speaker to drive the speaker to produce sound.

[0048] When all Bluetooth audio units are powered on, the broadcast receiving module sets the local Bluetooth audio unit as the auxiliary Bluetooth audio unit;

[0049] When any of the Bluetooth speakers is connected to the peripheral device via Bluetooth, the Bluetooth module sends a connection signal to the broadcast receiving module. The broadcast receiving module receives the connection signal and sets the local Bluetooth speaker unit as the host Bluetooth speaker.

[0050] When the auxiliary Bluetooth speaker detects the host signal, the broadcast receiving module of the auxiliary Bluetooth speaker sends a connection request to the broadcast receiving module of the host Bluetooth speaker. The broadcast receiving module of the host Bluetooth speaker verifies and confirms it, and completes the networking with the auxiliary Bluetooth speaker.

[0051] The broadcast receiving module of the host Bluetooth speaker sends the audio signal to the broadcast receiving modules of all the slave Bluetooth speakers synchronously;

[0052] The broadcast receiving modules of the host Bluetooth speaker and all the slave Bluetooth speakers synchronously send the audio signal to the power amplifier modules of the host Bluetooth speaker and all the slave Bluetooth speakers; the power amplifier modules of the host Bluetooth speaker and all the slave Bluetooth speakers drive the speakers to sound, completing the interconnected playback.

[0053] In this embodiment, the power input voltage is 29V, the step-down voltage of the first DC-DC converter is 10.9V, and the step-down voltage of the second DC-DC converter is 5V.

[0054] This Bluetooth speaker unit utilizes two DC-DC converters to improve the efficiency of the power amplifier module, Bluetooth module, and broadcast receiver module, enabling more stable and high-quality audio playback. Utilizing Audio Broadcast LE AUDIO technology, the Bluetooth speaker's broadcast receiver module can determine whether the Bluetooth speaker is in slave or host mode, enabling both classic playback from a single Bluetooth speaker and interconnected playback from multiple Bluetooth speakers. Users can choose to adapt to their needs and environment, enabling diverse speaker usage. This unit offers advantages in versatility, integrated design, and sound quality, providing a superior user experience and enhancing the performance and competitiveness of the Bluetooth speaker.

[0055] The following further describes the chip models of the various modules of the speaker unit in this embodiment and the corresponding connection relationships:

[0056] As shown in Figure 3-7, the first DC-DC converter uses the chip model: SCT2630; the second DC-DC converter uses the chip model: XL1509; the Bluetooth module uses the chip model: BT8922B2; the broadcast receiving module uses the chip model: BT8962B5; and the power amplifier module uses the chip model: TPA3110D2.

[0057] The EN pin of the chip SCT2630 is connected to a resistor and the pin VIN is connected in parallel to an external power supply. The pin SW is connected to the inductor and capacitor as the output pin PVCC. The output pin PVCC is connected to the chip TPA3110D2.

[0058] The VIN pin of the chip XL1509 is connected to the external power supply, and the OUTPUT pin is connected to the inductor, diode and resistor as the output pin VMCU. The output pin VMCU is connected to the chip BT8922B2 and the chip BT8962B5.

[0059] The DACR pin of the chip BT8922B2 is connected to the PB15 pin of the chip BT8962B5, and the DACL pin of the chip BT8922B2 is connected to the PB14 pin of the chip BT8962B5.

[0060] The DACR pin of the chip BT8962B5 is connected to the LINP pin of the chip TPA3110D2, and the DACL pin of the chip BT8962B5 is connected to the PINP pin of the chip TPA3110D2.

[0061] The BT8922B2 and BT8962B5 pins BT_ANT are connected to capacitors and the onboard antenna.

[0062] The chip used in this embodiment has the characteristics of high performance, high integration and high stability. It can realize effective communication and collaborative work between various modules, provide stable and reliable audio signal processing and amplification functions, and provide a comprehensive, efficient and innovative solution for the design and manufacture of audio equipment.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. References to the same or similar parts between the various embodiments are sufficient. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For relevant parts, refer to the method description.

[0064] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Bluetooth speaker networking system, characterized in that: include: Multiple Bluetooth audio units connected to each other through wireless communication; Among them, when all Bluetooth audio units are powered on, they are set as auxiliary Bluetooth audio units by default; When any of the Bluetooth audio units is connected to an external device via Bluetooth, it is set as the host Bluetooth audio unit; All other auxiliary Bluetooth speakers are connected to the host Bluetooth speaker and their own Bluetooth is turned off; The host Bluetooth speaker synchronizes the received audio signal to all other auxiliary Bluetooth speakers.

2. A Bluetooth speaker networking system according to claim 1, characterized in that: The Bluetooth audio unit includes: a power module, a Bluetooth module, a broadcast receiving module, a power amplifier module and a speaker; The power supply module includes: a first DC-DC converter and a second DC-DC converter; the first DC-DC converter is connected to the power amplifier module and is used to reduce the voltage to supply power to the power amplifier module; the second DC-DC converter is connected to the Bluetooth module and the broadcast receiving module and is used to reduce the voltage to supply power to the Bluetooth module and the broadcast receiving module; The Bluetooth module is used to receive audio signals sent by an external device, and is connected to a broadcast receiving module to transmit the audio signals to the broadcast receiving module; the broadcast receiving module is used to determine the auxiliary mode and the host mode of the Bluetooth audio system, and is connected to the power amplifier module to transmit the audio signals to the power amplifier module; the power amplifier module is connected to a speaker to drive the speaker to produce sound.

3. A Bluetooth speaker networking system according to claim 2, characterized in that: When all Bluetooth audio units are powered on, the broadcast receiving module sets the local Bluetooth audio unit as the auxiliary Bluetooth audio unit; When any one of the Bluetooth speakers is connected to the peripheral device via Bluetooth, the Bluetooth module sends a connection signal to the broadcast receiving module, and the broadcast receiving module receives the connection signal and sets the local Bluetooth speaker unit as the host Bluetooth speaker.

4. A Bluetooth speaker networking system according to claim 3, characterized in that: When the auxiliary machine Bluetooth speaker finds the host signal, the broadcast receiving module of the auxiliary machine Bluetooth speaker sends a connection request to the broadcast receiving module of the host Bluetooth speaker, and the broadcast receiving module of the host Bluetooth speaker verifies and confirms, and completes networking with the auxiliary machine Bluetooth speaker; The broadcast receiving module of the host Bluetooth speaker synchronously sends the audio signal to the broadcast receiving modules of all the slave Bluetooth speakers; The broadcast receiving modules of the host Bluetooth speaker and all the auxiliary Bluetooth speakers synchronously send the audio signal to the power amplifier modules of the host Bluetooth speaker and all the auxiliary Bluetooth speakers; the power amplifier modules of the host Bluetooth speaker and all the auxiliary Bluetooth speakers drive the speakers to sound, completing the interconnected playback.

5. A Bluetooth speaker networking system according to claim 2, characterized in that: The first DC-DC converter uses a chip model: SCT2630; the second DC-DC converter uses a chip model: XL1509; the Bluetooth module uses a chip model: BT8922B2; the broadcast receiving module uses a chip model: BT8962B5; the power amplifier module uses a chip model: TPA3110D2.

6. A Bluetooth speaker networking system according to claim 5, characterized in that: The EN pin of the chip SCT2630 is connected to a resistor and the pin VIN is connected in parallel to an external power supply, and the pin SW is connected to an inductor and a capacitor as an output pin PVCC, and the output pin PVCC is connected to the chip TPA3110D2.

7. A Bluetooth speaker networking system according to claim 5, characterized in that: The pin VIN of the chip XL1509 is connected to an external power supply, and the pin OUTPUT is connected to an inductor, a diode and a resistor as an output pin VMCU, and the output pin VMCU is connected to the chip BT8922B2 and the chip BT8962B5.

8. A Bluetooth speaker networking system according to claim 5, characterized in that: The DACR pin of chip BT8922B2 is connected to the PB15 pin of chip BT8962B5, and the DACL pin of chip BT8922B2 is connected to the PB14 pin of chip BT8962B5.

9. A Bluetooth speaker networking system according to claim 5, characterized in that: The DACR pin of chip BT8962B5 is connected to the LINP pin of chip TPA3110D2, and the DACL pin of chip BT8962B5 is connected to the PINP pin of chip TPA3110D2.

10. A Bluetooth speaker networking system according to claim 5, characterized in that: The BT8922B2 and BT8962B5 pins BT_ANT are connected to capacitors and the onboard antenna.

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