CN101170325A - bluetooth wireless microphone - Google Patents

Abstract

The invention discloses a Bluetooth wireless microphone, which comprises a transmitter and a receiver which are connected in a wireless mode, wherein power supply components are respectively arranged in the transmitter and the receiver; the transmitter comprises an audio input module, a first audio processing module and a first Bluetooth communication module which are electrically connected in sequence; the receiver comprises a second Bluetooth communication module, a second audio processing module and an audio output module which are sequentially and electrically connected, wherein the audio output module can be connected with external output equipment. The invention adopts the Bluetooth communication protocol to transmit signals, can be used by a plurality of people simultaneously on the same large occasion, and can not generate any interference and interrupt sound in use; the operation mode is simple, the emitter and the receiver can be automatically paired, and the effect of no noise can be realized without debugging frequency; the audio data output is stable, the circuit is added with the function of eliminating noise and echo, and the beautiful tone quality and the real tone color can be realized; the emitter is provided with a volume adjusting key, and the volume can be adjusted without a loudspeaker.

Description

bluetooth wireless microphone

technical field

The invention relates to a wireless microphone.

Background technique

At present, most of the common wireless microphones are FM (frequency modulation) wireless microphones with a frequency range of 200-700 megabytes. This FM wireless microphone has the following disadvantages: 1) The frequency band used is unstable, and it can be used by several people at the same time in the same occasion. Sometimes serious mutual interference is prone to occur, and normal use cannot be guaranteed; (2) the size is large, and a large receiver and transmitter must be equipped, which is inconvenient to carry around. Moreover, when the transmitter is not used on the waist, if you accidentally fall down, it will often cause waist injury; (3) there are almost no volume adjustment keys, and when the volume needs to be adjusted, it is achieved through a loudspeaker; ( 4) The frequency of the transmitter and receiver must be adjusted before installation and use. If the adjustment is inaccurate, noise will occur; however, this frequency is difficult to adjust, so there will inevitably be some noise; (5) The manufacturing cost is relatively high; (6) )Single function.

With the development of wireless transmission technology, wireless Bluetooth transmission technology is gradually replacing traditional wireless transmission technology, and gradually widely used in various occasions and devices. Wireless Bluetooth transmission technology has the ability to transmit voice, data and signals at the same time without interference It has also become a very important transmission device for modern users to transmit voice or data. There are many Bluetooth headsets on the market, but Bluetooth microphones have not yet appeared.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of traditional wireless microphones and provide a wireless microphone that transmits via bluetooth.

In order to achieve the above object, the present invention adopts the following technical solutions: design a bluetooth wireless microphone, including a transmitter and a receiver connected wirelessly; the transmitter and the receiver are respectively provided with a power supply assembly; wherein, the The transmitter includes an audio input module, a first audio processing module, and a first Bluetooth communication module that are electrically connected in sequence; the receiver includes a second Bluetooth communication module that is electrically connected in sequence, a second audio processing module, and an external output device that can be connected Audio output module.

Further, the first bluetooth communication module includes a baseband processing unit and a radio frequency processing unit, which converts the digital audio signal from the first audio processing module into a bluetooth signal, and then sends the bluetooth signal to the receiver through the first built-in bluetooth antenna device; the second bluetooth communication module includes a baseband processing unit and a radio frequency processing unit, which receives the bluetooth signal from the transmitter through the second built-in bluetooth antenna, then converts the bluetooth signal into a digital audio signal, and transmits it to the second audio processing module.

Preferably, the transmitter is also provided with a volume control device.

The transmitter is provided with a first pairing key, and the receiver is provided with a second pairing key.

The power supply assembly includes a charging circuit, a power management circuit and a rechargeable battery; the rechargeable battery is preferably a lithium battery.

The transmitter is provided with a fixing clip.

One end of the transmitter is provided with an audio input port, and the other end is provided with a switch device and a charging port; one end of the receiver is provided with an audio plug, and the other end is provided with a switch device and a charging port.

The transmitter and the receiver are respectively provided with LED indicator lights.

An audio amplification circuit may also be connected between the second audio processing module and the audio output module.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The Bluetooth communication protocol is used for signal transmission. Since Bluetooth uses a unique 2.4G frequency band, it can be used by multiple people at the same time on the same large occasion without any interference or interruption of use;

(2) After the switch device is turned on in the present invention, it can be plug-and-play after waiting for 3 seconds (pairing), the operation method is simple, the transmitter and the receiver can be automatically paired, and the effect of no noise can be realized without debugging the frequency ;

(3) The output of audio data is stable, and the function of eliminating noise and echo is added to the circuit, which can realize beautiful sound quality and real timbre;

(4) The length of the transmitter and the receiver among the present invention is only about 57mm, and its volume is small, full-featured, easy to carry, as long as the receiver is plugged into the audio interface of the loudspeaker or other external devices in any environment The audio interface is ready to use immediately. Because it is easy to use and carry, it can be used in a wide range, for example, when teachers at all levels of schools and cram schools give lectures, when schools and various groups have outdoor activities, when travel agencies lead groups, when various promotional activities, and when various religious gatherings , as well as in large hospitals, parking lots, factories, etc.;

(5) volume adjustment key is set on the transmitter of the present invention, needn't realize by loudspeaker when adjusting volume;

(6) The present invention is compatible with all devices using the Bluetooth protocol, such as notebook computers, video cameras, PDAs, MP3/MP4, karaoke singing systems, satellite navigators and loudspeakers, etc.;

(7) Low manufacturing cost;

(8) Low power consumption.

Description of drawings

Fig. 1 is the perspective view of the transmitter of bluetooth wireless microphone of the present invention;

Fig. 2 is the perspective view of the receiver of bluetooth wireless microphone of the present invention;

Fig. 3 is the principle block diagram of the transmitter of bluetooth wireless microphone of the present invention;

Fig. 4 is a schematic block diagram of the receiver of the Bluetooth wireless microphone of the present invention.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Detailed ways

FIG. 1 is a perspective view of the transmitter of the Bluetooth wireless microphone of the present invention. The transmitter 1 is provided with a fixing clip 2, which can clamp and fix the transmitter 1 on the user's chest. One end of the transmitter is provided with an audio input port 3 which can be opposite to the sound source, and the other end is provided with a switch device and a charging port. In addition, the transmitter 1 is also provided with a volume control button 4, and the volume control button 4 also serves as a first pairing button for pairing with the receiver. In order to facilitate the user to understand the current working state of the transmitter, the transmitter 1 is also provided with an LED indicator light 5 .

Fig. 2 is a perspective view of the receiver of the Bluetooth wireless microphone of the present invention. One end of the receiver 6 is provided with a 2.5mm/3.5mm universal audio plug 7 for connecting to an external output device 10 such as a loudspeaker, and the other end of the receiver 6 is provided with a switch device and a charging port. The receiver 6 is provided with a second pairing key 8 paired with the transmitter 1 . In order to facilitate the user to understand the current working state of the receiver 6 , the receiver 6 is also provided with an LED indicator 9 .

Fig. 3 is a schematic block diagram of the transmitter 1 of the Bluetooth wireless microphone of the present invention. Wherein, the interior of the transmitter 1 includes an audio input module 11, a first audio processing module 12 and a first Bluetooth communication module 13 electrically connected in sequence; in addition, a power supply assembly 14 is also provided in the transmitter, including a charging circuit 141, a power management The circuit 142 and the rechargeable lithium battery 143 etc. are used to provide the required electric energy for each module, and the charging port can be used to connect with the charger to charge the lithium battery 143. Wherein, the audio input module 11 utilizes the pickup head 111 to receive an external sound signal, and outputs an analog audio signal to the first audio processing module 12; the first audio processing module 12 includes an audio encoding/decoding circuit for inputting the audio input module 11 The analog audio signal is converted into a corresponding digital audio signal; the first bluetooth communication module 13 includes a baseband processing unit 131 and a radio frequency processing unit 132, which is used to convert the digital audio signal into a bluetooth signal, and then pass the first built-in bluetooth antenna 133 to the bluetooth The signal is sent to the receiver 6 .

Fig. 4 is a schematic block diagram of the receiver 6 of the Bluetooth wireless microphone of the present invention. The receiver 6 includes a second bluetooth communication module 61, a second audio processing module 62 and an audio output module 63 electrically connected in sequence; in addition, the receiver 6 is also provided with a power supply assembly 64, including a charging circuit 641, a power management circuit 642 and rechargeable lithium battery 643 etc., so that each module provides the electric energy required for work, and can utilize charging port to be connected with charger, to charge lithium battery 643. The second bluetooth communication module 61 includes a radio frequency processing unit 611 and a baseband processing unit 612, which receives the bluetooth signal from the transmitter 1 through the second built-in bluetooth antenna 613, then converts the bluetooth signal into a digital audio signal, and sends it to The second audio processing module 62 ; the second audio processing module 62 converts the digital audio signal into an analog audio signal, and then sends it to the audio output module 63 . The audio output module 63 is connected to an external device such as a loudspeaker through the universal audio connector 7 to amplify and output the audio signal. When connecting with an external device without signal amplification function, an audio amplifying circuit can be connected between the second audio processing module 62 and the audio output module 63 so as to amplify the audio signal before outputting it.

The present invention adopts the bluetooth communication protocol for signal transmission, which can be used by multiple people at the same time on the same large occasion, without any interference, and without the phenomenon of interrupted sound during use; the operation mode is simple, and the communication between the transmitter and the receiver It can be paired automatically, and the effect of no noise can be achieved without adjusting the frequency; the audio data output is stable, and the function of eliminating noise and echo is added to the circuit, which can realize beautiful sound quality and real timbre; the volume adjustment key is set on the transmitter, adjust Volume can be achieved without a loudspeaker.

What has been described above are only preferred embodiments of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these changes and changes should be deemed to belong to the protection scope of the present invention.

Claims (10)

1. A bluetooth wireless microphone, including Transmitters and receivers connected wirelessly; The transmitter and the receiver are respectively provided with power supply components; It is characterized by: The transmitter includes an audio input module, a first audio processing module and a first Bluetooth communication module that are electrically connected in sequence; The receiver includes a second bluetooth communication module, a second audio processing module and an audio output module that can be connected to an external output device, which are electrically connected in sequence. 2. The Bluetooth wireless microphone according to claim 1, characterized in that: The first bluetooth communication module includes a baseband processing unit and a radio frequency processing unit, which converts the digital audio signal from the first audio processing module into a bluetooth signal, and then sends the bluetooth signal to the receiver through the first built-in bluetooth antenna; The second bluetooth communication module includes a baseband processing unit and a radio frequency processing unit, which receives the bluetooth signal from the transmitter through the second built-in bluetooth antenna, then converts the bluetooth signal into a digital audio signal, and sends it to the second audio processing module . 3. The Bluetooth wireless microphone according to claim 1, characterized in that: The transmitter is also provided with a volume control device. 4. The Bluetooth wireless microphone according to claim 1, characterized in that: The transmitter is provided with a first pairing key; The receiver is provided with a second pairing key. 5. The Bluetooth wireless microphone according to claim 1, characterized in that: The power component includes a charging circuit, a power management circuit and a rechargeable battery. 6. The Bluetooth wireless microphone according to claim 5, characterized in that: The rechargeable battery is a lithium battery. 7. The Bluetooth wireless microphone according to claim 1, characterized in that: The transmitter is provided with a fixing clip. 8. The Bluetooth wireless microphone according to claim 1, characterized in that: One end of the transmitter is provided with an audio input port, and the other end is provided with a switch device and a charging port; One end of the receiver is provided with an audio plug, and the other end is provided with a switch device and a charging port. 9. The Bluetooth wireless microphone according to claim 1, characterized in that: The transmitter and the receiver are respectively provided with LED indicator lights. 10. The Bluetooth wireless microphone according to claim 1, characterized in that: An audio amplification circuit is also connected between the second audio processing module and the audio output module.

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