CN201029226Y - Wireless transmission relay device for vehicle - Google Patents

Abstract

The utility model provides an automobile-used wireless transmission relay device through the wireless signal format of judging electron device, and is provided with various signal format broadcast routes to according to wireless electron device input signal format automatically, select the broadcast route of automobile-used loudspeaker, make different signal formats not broadcast simultaneously and disturb, in order to reach the function of automatic switch incoming telegram and audio-visual signal.

Description

Vehicle wireless transmission relay device

technical field

The utility model relates to a wireless transmission relay device for vehicles, in particular to a relay device with the functions of judging sound signals, audio-visual signals and incoming call signals, and automatically switching the order of playing by speakers of the vehicle audio playback system according to different signal formats. relay device.

Background technique

With the development of electronic products and software industry technology, the original function of the car's internal audio playback system is no longer sufficient, and it is facing the situation of replacing the old with a new one. Entire phase-out is costly and time-consuming.

Therefore, some manufacturers have introduced the currently popular and popular MP3 player with radio frequency modulation technology to convert the music data stored in the personalized MP3 player into a radio frequency signal, and then transmit it to the radio frequency of the car audio playback system. The antenna is played by the loudspeaker of the car audio playback system; like this, the existing vehicle does not have the car audio playback system with the MP3 music playback format, and can also listen to songs or sounds in the MP3 music format.

In addition, due to the increasing popularity of mobile phones, drivers are not allowed to hold mobile phones while driving in China to avoid driving hazards. Therefore, the combination of car loudspeakers and mobile phones has appeared. It can be amplified and received for hands-free mobile phone conversation. Furthermore, with the popularization of audio-visual products, some drivers also install players and monitors for watching audio-visual data.

From the above description, it can be known that for more and more diversified electronic products, there are more and more multimedia electronic configurations in the vehicle. However, due to the limited space inside the vehicle and the difficulty in obtaining power sources, it is not suitable to install too many multimedia playback devices. Furthermore, if the products such as the above-mentioned MP3 radio frequency modulator and mobile phone loudspeaker are all installed in the car, when the audio system in the car plays MP3 songs, and the mobile phone calls, the loudspeaker will also broadcast the incoming call signal. , and cause the passengers in the car to listen to the song and the incoming call signal of the mobile phone at the same time, so the driver often has to be distracted and turn off the audio playback system to clearly listen to the incoming call signal, which will still cause concerns about driving safety.

Utility model content

The main purpose of this utility model is to provide a wireless transmission relay device for vehicles, which can automatically switch and control the playback order of the speakers of the audio playback system according to the format signals such as judging sound signals, video and audio signals, and incoming call signals, making it more convenient and convenient for users. Listen to the sound signal/video signal or incoming call signal clearly without interfering with each other.

The vehicle wireless transmission relay device of the present utility model comprises:

A wireless transceiver module, which is a distance wireless transceiver module of various protocols (such as bluetooth, radio frequency or infrared rays, etc.), used to form a wireless connection with an external electronic device with the same protocol wireless transmitter;

A processing unit, whose output/input end is correspondingly connected to the wireless transceiver module, to receive the sound signal, audio-visual signal and incoming call signal from the wireless transceiver module, and output after processing, or transmit the incoming call response signal/control signal to the wireless transceiver module module;

A signal switching circuit, which includes an input terminal and a plurality of output terminals; wherein the input terminal is connected to the output terminal of the processing unit, and after receiving the sound signal, audio-visual signal and incoming call signal output by the processing unit, it is judged that the current input The format of the signal is output to the corresponding output terminal according to the judgment result;

An incoming call signal processing and pre-play circuit, one of the audio source signal terminals is connected to the output end of the signal switching circuit for outputting incoming call signals, and after obtaining the incoming call signal, it is processed into an audio source signal that can be played by the speaker; the other audio source The signal terminal is the audio source output signal terminal for the audio host;

A speaker sound source switching circuit is connected in series between the car speaker, the audio host and the call signal processing and pre-play circuit, and its control terminal is connected to the call signal processing and pre-play circuit to switch the sound source signal of the speaker from In audio host or incoming call signal processing and pre-play circuit;

An audio-visual signal integration interface output port, the input end of which is connected to the output end of the signal switching circuit outputting sound or audio-visual signals, and the output end is connected to the signal source terminal of the audio host; and

A microphone, connected to the input end of the processing unit through an analog-to-digital conversion circuit, is used to receive the sound in the car, converted into a digital signal by the analog-to-digital conversion circuit and output to the processing unit, and sent to the wireless transceiver module by the processing unit, Respond to the incoming call signal and send it back to the mobile phone.

The above-mentioned utility model mainly designs a signal switching circuit to judge the format of the wireless signal currently input to the relay device, and designs a speaker sound source switching circuit so that it is connected in series between the car speaker, the audio host, and the incoming call signal processing and pre-play circuit , the incoming call signal processing and pre-play circuit judges whether there is an incoming call signal input, if there is, the incoming call signal is processed into a signal that can be played by the speaker, and at the same time cut off the connection between the speaker and the audio output signal end of the audio playback system, and switch to the incoming call signal The output end of the processing and pre-play circuit is connected so that the call signal can be played by the speaker smoothly.

Another purpose of the present utility model is to provide a relay device with low installation cost. Since the car speakers are usually provided with two or more than four speaker devices, and the playback of the above-mentioned call signal does not have the requirement of playback sound quality, so The utility model can achieve the above purpose only by connecting with a loudspeaker; in this way, when the above-mentioned call signal processing and pre-play circuit receives the call signal, it will simultaneously send a mute control signal to the audio host to make the sound Multiple sound source output signal terminals of the host (used to connect to corresponding speaker devices) no longer output sound source signals; therefore, as long as the utility model is connected to a single speaker, it can also achieve priority switching of incoming call signals without being overwhelmed by the original sound source signal interference.

Another purpose of the utility model is to provide a repeater for remote remote control of external electronic devices. Since the utility model is set according to the protocol of the wireless transceiver module to receive the wireless signal of the electronic device compatible with the protocol, the relationship between the utility model and the electronic device In order to facilitate the user to control the function of the electronic device, the utility model is additionally provided with a remote control receiving circuit and a remote controller. After being processed into a digital format, it is output to the processing unit, and then the processing unit outputs to the wireless transceiver module to transmit the control signal to the corresponding electronic device, so as to achieve the purpose of controlling the electronic device.

Description of drawings

Fig. 1 is the use schematic diagram of a preferred embodiment of the utility model;

Fig. 2 is the circuit block diagram of the first preferred embodiment of the utility model and the external electronic device and the car audio playback system;

Fig. 3 is the circuit block diagram of the second preferred embodiment of the utility model and the external electronic device and the car audio playback system;

4A to C are detailed circuit diagrams of FIG. 2 .

in the picture

(10) Relay device (11) Wireless transceiver module

(12) Processing unit (13) Signal switching circuit

(14) Incoming call signal processing and pre-play circuit

(15) Speaker source switching circuit

(16) Audio and video signal integration interface output port

(17)Microphone

(171) Analog-to-digital conversion circuit

(18) Remote control receiving circuit (19) Remote control

(20) Electronic devices (20a) Mobile phones

(21) Sound/video processing circuit

(22) Incoming call signal processing circuit (23) Antenna

(24) Wireless transceiver module

(30) Audio playback system (31) Audio host

(32)Horn

Detailed ways

Please refer to shown in Fig. 1, it is the vehicle wireless transmission relay device (10) of the present utility model to collocate the use schematic diagram of a vehicle audio playback system (30), and this vehicle audio playback system (30) includes a sound host ( 31) and at least one speaker (32); wherein, the first preferred embodiment of the wireless transmission relay device (10) of the present utility model is shown in Fig. 2 and Fig. 4A to C, which includes:

A wireless transceiver module (11), which can be a distance wireless transceiver module of various protocols (such as bluetooth, radio frequency or infrared rays, etc.), is used to form a wireless connection with an external electronic device (20) having the same protocol wireless transmitter, Wherein if the electronic device (20) is a mobile phone (20a), it at least includes a sound/video processing circuit (21), an incoming call signal processing circuit (22), a wireless transceiver module (24) and an antenna; if If it is a general sound player (such as MP3 PLAYER) or an audio-visual player (such as NOTEBOOK), it at least includes a sound/video processing circuit (21) and a wireless transceiver module (24);

A processing unit (12), whose output/input end is correspondingly connected to the wireless transceiver module (11), to receive the sound signal, audio-visual signal and incoming call signal from the wireless transceiver module (11), and output after processing, or transmit the incoming call Response signal/control signal to the wireless transceiver module (11);

A signal switching circuit (13), which includes an input terminal and a plurality of output terminals; wherein the input terminal is connected to the output terminal of the processing unit (12), and receives the audio signal and audio-visual signal output by the processing unit (12) After receiving the incoming call signal, judge the format of the current input signal, and output it to the corresponding output terminal according to the judgment result;

An incoming call signal processing and pre-play circuit (14), one of its audio source signal end is connected to the output port (AUDIO_OUT) of the signal switching circuit (13) for outputting the incoming call signal, and after obtaining the incoming call signal, it is processed as available The audio source signal played by the loudspeaker (32); the other audio source signal end is for the audio source output signal end of the audio host (31);

A loudspeaker sound source switching circuit (15), is connected in series between the sound source output signal end of the car loudspeaker (32), the audio host (31) and the incoming call signal processing and the sound source signal end of the pre-play circuit (14), and its control The end is connected to the output end of the processing unit (12), and the sound source signal used to switch the speaker (32) comes from the audio host (31) or incoming call signal processing and pre-play circuit (14), and the speaker source switching circuit ( 15) Consists of a relay (RELAY-DPDT) and a transistor (Q2), wherein the excitation coil of the relay is connected to the collector of the transistor (Q2), and the base of the transistor (Q2) is connected to the processing unit (12 ) output terminal (SPON);

An audio-visual signal integration interface output port (16), the input end of which is connected to the output end of the signal switching circuit (13) outputting sound or audio-visual signals, and the output end is connected to the signal source terminal of the audio host (31); and

A microphone (17), connected to the input end of the processing unit (12) through an analog-to-digital conversion circuit (171), is used to receive the sound in the car, which is converted into a digital signal by the analog-to-digital conversion circuit (171) and output to the processing unit (12), the processing unit (12) transmits to the wireless transceiver module (11), and returns the response signal to the electronic device (20) and the mobile phone (20a).

And, because the car horn is usually provided with two or more than four horn devices, and the playback of the above-mentioned call signal does not have the requirement of playing sound quality, so the utility model only needs to be connected with a horn (32) to achieve the above-mentioned Purpose; In this way, the above-mentioned incoming call signal processing and pre-play circuit (14) will send a mute control signal to the audio host (31) at the same time when receiving the incoming call signal, so that multiple audio sources of the audio host (31) The output signal end (for connecting the corresponding loudspeaker device) no longer outputs the sound source signal; therefore, as long as the utility model is connected with a single loudspeaker (32), it can also achieve priority switching of incoming call signals without being disturbed by the original sound source signal played.

Further, please refer to Fig. 3, since the utility model is set according to the protocol of the wireless transceiver module to receive the wireless signal of the electronic device compatible with the protocol, and for the convenience of the user to control the function of the electronic device, a remote control receiving circuit (18) is added. ), its input end is used to receive the remote control command of an external remote controller (19), and the output end is connected to the processing unit (12), after the remote control receiving circuit (18) receives the signal of the remote controller (19), It will be output to the processing unit (12), and then output to the wireless transceiver module by the processing unit (12), so as to transmit the control signal to the corresponding electronic device (20), so as to achieve the purpose of controlling the electronic device (20); Wherein the remote control receiving circuit (18) can be an infrared receiving circuit or an RF receiving circuit.

It can be seen from the above description that the utility model can be used as a signal transmission channel between the external wireless electronic device (20) and the car audio playback system (30), so that a simple music player, video player or mobile phone can directly use the car audio The playback system plays music, and since the mobile phone has an incoming call signal, it can also receive the incoming call signal and play it through the audio playback system in the car, and the user only needs to use the microphone, and the relay device (10) can immediately respond The incoming call signal is sent back to the mobile phone.

Because the mobile phone incoming call time is uncertain, so this relay device (10) further designs a signal switching circuit (13) to judge the wireless signal format input to relay device (10) at present, and designs a loudspeaker sound source switching circuit (15) , so that it is connected in series between the car horn (32), the audio host (31) and the incoming call signal processing and the pre-play circuit (14), so as to determine that the loudspeaker (32) is only connected to the audio host (31) at the same time. Or incoming call signal processing and pre-play circuit (14) are connected, like this, when loudspeaker (32) is playing the sound source signal from audio host (31), if mobile phone has incoming call signal to produce, then this incoming call signal processing and pre-playing circuit (14) are connected. The playback circuit (14) will process the incoming call signal into a sound source signal that can be played by the speaker (32), and then interrupt the connection between the speaker (32) and the audio host (31), so that the speaker (32) and the incoming call signal are processed and forwarded. Put playing circuit (14) to be connected, so this caller signal can be played preferentially automatically, because this loudspeaker (32) is no longer connected with this audio host (31), so no longer play the sound source signal of audio host (31).

The utility model can provide a wireless electronic device using a car audio playback system as a medium for sound or video playback. Since there are many wireless signal formats in the electronic device, the utility model is provided with two signal format playback paths to automatically follow the signal format. And choose the playback path of the speaker, different signal formats will not play at the same time and interfere; in short, if the pure music player or video player outputs a sound signal or video signal, it will be judged by the signal processing circuit and then output to the The audio host is output to the speaker through the audio host for playback; at this time, if there is an incoming call signal from the mobile phone, the relay device of the present utility model will immediately cut off the connection between the original speaker and the audio host, and switch the speaker to the relay device , the relay device broadcasts the incoming call signal through the loudspeaker, so that the function of automatically judging and switching the incoming call and audio-visual signal can be achieved.

Claims (9)

1. an automobile-used wireless transmission trunk device is characterized in that, comprising:

One radio receiving transmitting module, it is that the square of variety of protocol is apart from radio receiving transmitting module, in order to constitute wireless connections with the external electronic with same protocol wireless launcher;

One processing unit, its output/go into to hold correspondence to be connected to radio receiving transmitting module, receiving voice signal or video-audio signal and incoming telephone signal, and is handled back output, this radio receiving transmitting module of or transmission incoming call response signal/control signal to from radio receiving transmitting module;

One signal switching circuit, it comprises an input and a plurality of output; Wherein input is connected to the output of this processing unit, and behind the voice signal, video-audio signal and the incoming telephone signal that receive this processing unit output, is judged the form of present input signal, exports corresponding output to according to judged result;

One incoming telephone signal is handled and preposition playing circuit, and one sound source signal end is connected to the output of this signal switching circuit in order to the output incoming signal, and after obtaining incoming telephone signal, being treated to can be for the sound source signal of loudspeaker broadcast; Another sound source signal end is the source of sound output signal end for this main system of audio;

One loudspeaker source of sound commutation circuit, be connected between automobile horn, main system of audio and incoming telephone signal processing and the preposition playing circuit, its control end is connected to this processing unit, comes from main system of audio or incoming telephone signal processing and preposition playing circuit in order to the sound source signal that switches these loudspeaker;

One video-audio signal integrated interface output port, its input is connected to the output of this signal switching circuit output sound or video-audio signal, and output is connected to the signal source terminal of this main system of audio; And

One microphone, be connected to the input of processing unit by an analog-to-digital conversion circuit, in order to receive sound in the car, be converted to digital signal through analog-to-digital conversion circuit and export this processing unit to, be sent to this radio receiving transmitting module by processing unit, will respond incoming telephone signal and be back to electronic installation.

2. automobile-used wireless transmission trunk device as claimed in claim 1 is characterized in that:

This incoming telephone signal is handled and the output of preposition playing circuit further connects for main system of audio, with when receiving incoming telephone signal, this main system of audio is sent a quiet control signal.

3. automobile-used wireless transmission trunk device as claimed in claim 1 or 2 is characterized in that:

This radio receiving transmitting module is a bluetooth module, in order to connect with bluetooth cellular phone.

4. automobile-used wireless transmission trunk device as claimed in claim 1 or 2 is characterized in that:

This radio receiving transmitting module is a radio-frequency module.

5. automobile-used wireless transmission trunk device as claimed in claim 1 or 2 is characterized in that:

This radio receiving transmitting module is an infrared module.

6. automobile-used wireless transmission trunk device as claimed in claim 1 or 2 is characterized in that:

The input of this processing unit further connects a remote-control receiving circuit, and the input of this remote-control receiving circuit is in order to receive the guidance command of an external remote.

7. automobile-used wireless transmission trunk device as claimed in claim 6 is characterized in that:

This remote-control receiving circuit is an infrared radiation receiving circuit.

8. automobile-used wireless transmission trunk device as claimed in claim 5 is characterized in that:

This remote-control receiving circuit is a RF receiving circuit.

9. automobile-used wireless transmission trunk device as claimed in claim 1 or 2 is characterized in that, this loudspeaker source of sound commutation circuit comprises:

One relay, its diverter switch connect automobile horn, main system of audio and incoming telephone signal respectively to be handled and preposition playing circuit; And

One transistor, its collector electrode is connected to the magnetizing coil of this relay, and this transistor base is connected to the output of this processing unit.

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