CN102572055A - Onboard Bluetooth hands-free system - Google Patents
Onboard Bluetooth hands-free system Download PDFInfo
- Publication number
- CN102572055A CN102572055A CN2012100900190A CN201210090019A CN102572055A CN 102572055 A CN102572055 A CN 102572055A CN 2012100900190 A CN2012100900190 A CN 2012100900190A CN 201210090019 A CN201210090019 A CN 201210090019A CN 102572055 A CN102572055 A CN 102572055A
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- control module
- bluetooth
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- phone control
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Abstract
The invention relates to an onboard Bluetooth hands-free system, which consists of a Bluetooth mobile phone control module, an interior sound system, an inner rearview mirror assembly, a steering wheel control key and a Bluetooth mobile phone. The system is characterized in that: the Bluetooth mobile phone is wirelessly connected with the Bluetooth mobile phone control module for the transmission of a hands-free profile (HFP) signal; the Bluetooth mobile phone control module and the inner rearview mirror assembly bidirectionally transmit a caller identifier (ID) signal TXD and a response signal RXD through a data wire; the rearview mirror assembly unidirectionally transmits microphone volume signals Mic+ and Mic- to the Bluetooth mobile phone control module; the steering wheel control key is connected with the Bluetooth mobile phone control module through the data wire; an incoming call audio signal is unidirectionally transmitted to the interior sound system through the Bluetooth mobile phone control module; the interior sound system transmits the audio signal to a loudspeaker; and an automotive ignition power supply system is connected with the Bluetooth mobile phone control module through a power cord. By the system, a user can be helped to answer the phone when driving, driving safety can be improved, and traffic accidents can be reduced.
Description
Technical field
The present invention relates to a kind of on-vehicle Bluetooth Handless system, belong to a kind of composite type onboard system.
Background technology
Along with the continuous development of mobile communication technology, mobile phone has become a part indispensable in people's daily life.But in startup procedure, use mobile phone that major safety risks are arranged; In order to address this problem; People have adopted several different methods, and as through signal modulation, frequency modulation amplification etc., but these methods all can not address this problem well; The appearance of Bluetooth technology provides a more excellent selection for addressing this problem.
(1) inside rear-view mirror interfacing; Comprise caller ID signal (TXD) to the inside rear-view mirror module that receives; (Mic+ Mic-) carries out level conversion and impedance matching to Mike's signal of answer signal (RXD) and bluetooth push button signalling (RXD) and inside rear-view mirror; (2) Mike's amplification/power supply unit technology is accomplished 8V to the Mike on the inside rear-view mirror is provided power supply, the signal of the microphone on the inside rear-view mirror is carried out difference amplify, remove to disturb with echo cancel circuit and carry out Mike's Signal Matching; (3) echo cancel circuit technology, the sound passback of loud speaker is eliminated in the Acoustic treatment unit of realization hands-free phone.
Summary of the invention
The object of the present invention is to provide a kind of on-vehicle Bluetooth Handless system, it receives calls in the time of can helping the user to drive, and promotes driving safety, reduces traffic accident.
Technical scheme of the present invention is achieved in that the on-vehicle Bluetooth Handless system; Form by sound system, loud speaker, inside rear-view mirror assembly, steering wheel control button, bluetooth cellular phone in bluetooth cellular phone control module, the car; It is characterized in that: bluetooth cellular phone and bluetooth cellular phone control module are through wireless connections transmission HFP signal; Mutually transmit Mike signal volume Mic+ with the inside rear-view mirror assembly through data wire transmitted in both directions caller ID signal TXD and answer signal RXD, rearview single through the bluetooth cellular phone control module; Mic-is to the bluetooth cellular phone control module; Steering wheel control button connects the bluetooth cellular phone control module through data wire; The incoming call audio signal is via bluetooth cellular phone control module one-way transmission sound system in the car, and to loud speaker, the automotive ignition electric power system connects the bluetooth cellular phone control module through the power supply wire harness to sound system with audio signal transmission in the car.
Described inside rear-view mirror assembly is integrated with and detects bluetooth operational and controlled key button, caller ID display system and vehicle-mounted microphone.
The invention has the beneficial effects as follows that it receives calls in the time of can helping the user to drive, promote driving safety, reduce traffic accident.
Description of drawings
Fig. 1 is an electrical structure block diagram of the present invention.
Fig. 2 is the inner theory diagram of bluetooth cellular phone control module of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further: like Fig. 1, shown in 2; The on-vehicle Bluetooth Handless system; Form by sound system, loud speaker, inside rear-view mirror assembly, steering wheel control button, bluetooth cellular phone in bluetooth cellular phone control module, the car; It is characterized in that: bluetooth cellular phone and bluetooth cellular phone control module are through wireless connections transmission HFP signal; Mutually transmit Mike signal volume Mic+ with the inside rear-view mirror assembly through data wire transmitted in both directions caller ID signal TXD and answer signal RXD, rearview single through the bluetooth cellular phone control module; Mic-is to the bluetooth cellular phone control module, and steering wheel control button connects the bluetooth cellular phone control module through data wire, and the incoming call audio signal is via bluetooth cellular phone control module one-way transmission sound system in the car; To loud speaker, the automotive ignition electric power system connects the bluetooth cellular phone control module through the power supply wire harness to sound system with audio signal transmission in the car.
Described inside rear-view mirror assembly is integrated with and detects bluetooth operational and controlled key button, caller ID display system and vehicle-mounted microphone.
The bluetooth cellular phone control module
The bluetooth cellular phone control module is the key control unit of bluetooth handsfree system; Most functions of bluetooth handsfree system are all realized by the bluetooth cellular phone control module; Inside rear-view mirror assembly and Che Nei sound system just as the input and output interface of system, are realized the information interaction with the user; Bluetooth module is behind automotive ignition, through the user key-press information on the sound system is carried out Bluetooth pairing, bluetooth connects on the collection inside rear-view mirror assembly or in the car, if there is phone can realize answering, hanging up; Through gathering the key information on the inside rear-view mirror assembly, after the analyzing and processing, send instruction during incoming call, realize that call voice is play and caller ID shows to sound equipment, inside rear-view mirror assembly.
The inside rear-view mirror assembly
The inside rear-view mirror assembly is mainly accomplished 3 functions promptly: detect bluetooth operational and controlled key button, caller ID demonstration and vehicle-mounted microphone.
Inside rear-view mirror detects the operation of user to the bluetooth button during bluetooth handsfree system works, sends to bluetooth module through UART after being translated into specified command; Inside rear-view mirror receives the caller ID information that bluetooth module is sent through UART during incoming call, and it is presented on the caller ID display; Vehicle-mounted microphone during conversation on the inside rear-view mirror is gathered user's voice signal and is inputed to bluetooth module.Because time and present resource, ability situation, the bluetooth keypress function definition on the inside rear-view mirror is also fairly simple, specific as follows:
(1) " answers " function of key, (button can be arranged on steering wheel or the sound equipment)
(2) press during ring: hands-free answering,
(3) " hang up " function of key, (button can be arranged on steering wheel or the sound equipment)
(4) ring or conversation the time are pressed: hang up the telephone,
(5) press during standby: start phonetic dialing,
In addition, also increase caller ID and show (also can on audible indicator, realize):
(1) when incoming call ring and conversation, shows the caller ID of bluetooth telephone.
(2) figure place showing length is 12
Sound system in the car
Sound system in the car is mainly accomplished the broadcast of prompt tone and partner voice.The volume of sound system control sound in the car (can adopt suitably preset volume value, also can manual adjustments volume) simultaneously.The MUTE signal level that the bluetooth cellular phone control module is sent is during by high step-down, and sound system begins to play the conversation audio signal of bluetooth output in the car.The MUTE signal level is low always during the conversation.When the MUTE signal level uprises, finishes conversation audio signal, the audio source signal before switching back, signal switching time is less than 0.5s.When MUTE is high, during the sound equipment max volume, sound equipment output is not less than 40dB to Bluetooth audio frequency output isolation.Condition: 1kHz, 0.03v rms.
When playing the conversation voice signal, only use left loudspeaker and close all the other loud speakers.The additional signal to noise ratio of signal from bluetooth controller interface output to the sound equipment output should be less than 40dB.Condition: 1kHz, 0.3v rms; When playing the conversation voice signal, the plan of establishment should remembered or provide to the multiplication factor initial value that volume knob is corresponding specially.The different bluetooth cellular phones of convenient reply all will be regulated volume in order to avoid answer a call at every turn; Play the bluetooth telephone incident, should be high priority, can interrupt sound equipment and play and music.After playing the bluetooth telephone end, sound equipment should continue interrupted work; When automotive system powered up, if radio reception is closed, the MUTE signal step-down that bluetooth is sent can be opened sound equipment, and after finishing phone, sound equipment is closed automatically.Start, the shut-in time should be less than 1.2 seconds; Sound equipment receives the difference audio signal from bluetooth, and " bang, bang " sound when this differential pair signal raises simultaneously, during reduction, must not be arranged in the loud speaker significantly.Every end resistance to earth 10k Ω ± 20% is so that diagnosis is used.
Embodiment
The bluetooth cellular phone control module receives, feeds back the HFP signal of bluetooth cellular phone through Bluetooth signal; The caller ID signal (TXD) of bluetooth cellular phone control module sends to the inside rear-view mirror assembly with answer signal (RXD); The inside rear-view mirror assembly is with answer signal (RXD), Mike's signal volume (Mic+; Mic-) feed back to the bluetooth cellular phone control module; The signal that steering wheel control button will be controlled incoming call audio frequency volume through the signal of telecommunication outputs to the bluetooth cellular phone control module; The bluetooth cellular phone control module sends to sound system in the car with audio volume high low signal and audio signal again, and the sound equipment audio signal of will finally conversing sends loud speaker to, and the automotive ignition electric power system connects the bluetooth cellular phone control module through power line.
Claims (2)
1. on-vehicle Bluetooth Handless system; Form by sound system, loud speaker, inside rear-view mirror assembly, steering wheel control button, bluetooth cellular phone in bluetooth cellular phone control module, the car; It is characterized in that: bluetooth cellular phone and bluetooth cellular phone control module are through wireless connections transmission HFP signal; Mutually transmit Mike signal volume Mic+ with the inside rear-view mirror assembly through data wire transmitted in both directions caller ID signal TXD and answer signal RXD, rearview single through the bluetooth cellular phone control module; Mic-is to the bluetooth cellular phone control module, and steering wheel control button connects the bluetooth cellular phone control module through data wire, and the incoming call audio signal is via bluetooth cellular phone control module one-way transmission sound system in the car; To loud speaker, the automotive ignition electric power system connects the bluetooth cellular phone control module through the power supply wire harness to sound system with audio signal transmission in the car.
2. it is characterized in that described inside rear-view mirror assembly according to the on-vehicle Bluetooth Handless system described in the claim 1, be integrated with and detect bluetooth operational and controlled key button, caller ID display system and vehicle-mounted microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100900190A CN102572055A (en) | 2012-03-30 | 2012-03-30 | Onboard Bluetooth hands-free system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100900190A CN102572055A (en) | 2012-03-30 | 2012-03-30 | Onboard Bluetooth hands-free system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102572055A true CN102572055A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100900190A Pending CN102572055A (en) | 2012-03-30 | 2012-03-30 | Onboard Bluetooth hands-free system |
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| Country | Link |
|---|---|
| CN (1) | CN102572055A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103685573A (en) * | 2013-12-31 | 2014-03-26 | 东风汽车有限公司 | Interaction system used between automobile and intelligent terminal |
-
2012
- 2012-03-30 CN CN2012100900190A patent/CN102572055A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103685573A (en) * | 2013-12-31 | 2014-03-26 | 东风汽车有限公司 | Interaction system used between automobile and intelligent terminal |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |