CN2796254Y - Blue tooth hand-free device - Google Patents
Blue tooth hand-free device Download PDFInfo
- Publication number
- CN2796254Y CN2796254Y CN 03273295 CN03273295U CN2796254Y CN 2796254 Y CN2796254 Y CN 2796254Y CN 03273295 CN03273295 CN 03273295 CN 03273295 U CN03273295 U CN 03273295U CN 2796254 Y CN2796254 Y CN 2796254Y
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- bluetooth
- microphone
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Abstract
The utility model mainly discloses a car telephone hand free proposal realized by utilizing Bluetooth technology. The system is composed of a Bluetooth main frame, a voice tube, a microphone, a car audio, and a right front loudspeaker. The system and a mobile phone with Bluetooth function form the integral Bluetooth hand free car telephone together. The proposal solves the long-term obsession of wiring harness connection to people, and overcomes the disadvantages of the existing car hand free system; the utility model can replace R232, UBS, etc. to uses the mode of electric cable connection to transmit data, an earphone and the microphone are directly used for communication, the right front loudspeaker of the car can also be used for realizing hand free function, and the voice tube can be used for communication. The utility model has the advantages of simple structure, convenient operation, wide range of application, etc., and can be widely used for various means of communication.
Description
Technical field the utility model relates to a kind of hands-free device of bluetooth enable, especially relates to Bluetooth technology is applied in the on-vehicle hand-free system, has solved all drawbacks that wire harness connects, and realizes connecting wireless penetration.
Technical background bluetooth (Bluetooth) is by Toshiba, Ericsson, IBM, Intel and the Nokia technical standard in the common near radio digital communication that proposes of in May, 1998.Its target is to realize that the maximum data transmission speed 1Mb/s (effective transmission speed is 721kb/s), maximum transmission distance are 10 meters, the user needn't just can utilize ISM (industry, science, the medical science) frequency band of 2.4GHz through application, setting up 79 bandwidth thereon is the channel of 1MHz, with switch 1600 times frequency each second, the spread spectrum techniques of gear hobbing mode realizes the transmitting-receiving of electric wave.Its technical advantage is: support voice and transfer of data; Adopt radiotechnics, transmission range is big; Low in energy consumption; Cost is low.The technical performance parameter of bluetooth: effective propagation path is 10cm-10m, increases transmitting power and can reach 100 meters, in addition farther.The transceiver operating frequency is 2.45GHz, and coverage is 79 passages (from 2.402GHz to 2.480GHz) of 1MHz of being separated by.Data transmission technology is used short package, and Frequency Hopping Spread Spectrum 1600 times/second, prevents to eavesdrop and avoid interference; Package of each transmission, the size of package is from 126-287bit; The content of package can be the data that comprises different services such as data or voice.Data transfer bandwidth is that synchronous connection can reach each direction 32.6Kbps, the simulation that approaches 10 times of typical 56kb/s Modem connects speed, asynchronous connection allows the message transmission rate of a direction to reach 721kb/s, is used to upload or download, and at this moment rightabout speed is 57.6kb/s; Data transmission channel is to reserve 3 concurrent simultaneous voice passages, every bandwidth 64kb/s; Voice and data also may be combined in the passage, provide a 64kb/s simultaneous voice to connect and are connected with an asynchronous data.Shadow is wide before the Bluetooth technology, and domestic also the appearance is applied to Bluetooth technology in the car handsfree at present, therefore has the huge novelty and the progressive of showing.
Summary of the invention main purpose of the present utility model is to provide a kind of technical scheme, solves Bluetooth technology and uses in car handsfree, finishes the constraint that people are connected by cable for a long time, can realize the conversation hand-free function without restriction within the specific limits.
To achieve these goals, the bluetooth handsfree system is made up of bluetooth host, earphone, microphone, microphone, automobile audio, right front loudspeaker, and bluetooth host is core of the present invention.Its circuit mainly is made up of MCU (microcontroller), radio frequency bluetooth Transmit-Receive Unit (containing mould/number, A/D converter), coding/decoding unit, power control circuit unit, frequency switch circuit unit, radio-frequency receiving-transmitting antenna circuit etc.Accessing to audio treatment circuit and coding/decoding circuit between bluetooth frequency radio-frequency (RF) receiving and transmission module and the frequency switch circuit.Bluetooth antenna connects the Bluetooth RF transceiver module, and earphone, microphone, microphone etc. connect quiet commutation circuit.
When bluetooth cellular phone is received the signal of calling, at first signal receives by antenna and amplifies, this moment, mobile phone sent a series of instruction to bluetooth handsfree, after bluetooth handsfree receives instruction, at first digital signal is converted to analog signal by bluetooth host, and decoder is deciphered, through frequency switch circuit, provide signal and drive frequency switch circuit work, sound equipment is switched to mute state, again audio signal is play by the right front loudspeaker of automobile, input is then by microphone, thereby the realization hand-free function also can utilize External micro phone to converse, can also caller ID be shown by adding display driver and display circuit.This cover Handless system can also earphone and hands-free between, between the hands-free and mobile phone, carry out freely switching between the hands-free and microphone, further other additional function of exploitation is more convenient to use as required.
Be drawing explanation of the present utility model below the description of drawings:
Fig. 1 is a theory diagram of the present utility model;
Fig. 2 is the circuit diagram of a kind of enforcement of the present utility model;
Embodiment is described in further detail the utility model below in conjunction with drawings and Examples:
As shown in Figure 1, a kind of bluetooth handsfree contains two parts, first establishes in the bluetooth handsfree, be bluetooth host, it is made up of Bluetooth RF transceiver module (containing A/D conversion circuit), coding/decoding circuit, frequency switch circuit, power control circuit, microprocessor, Bluetooth antenna etc.; Second portion is the bluetooth handsfree peripheral hardware, by automobile audio, the right front loudspeaker of automobile, microphone, and composition such as microphone, earphone.
Power control circuit provides reliable work energy for whole bluetooth handsfree.The Bluetooth RF transmission circuit is whole hands-free part and parcel, its data of being responsible for sending out on the bluetooth cellular phone are carried out D/A switch, again by the decoding/encoding circuit, signal after treatment is transferred to respectively on control circuit, frequency switch circuit and the bluetooth cellular phone that is made of little processing, sends on the other side's the mobile phone by mobile phone again.
When making a phone call, speaker's sound is converted to analog signal by microphone or words with voice signal, wherein microphone is mini microphone and Microspeaker function, passes through coding/decoding circuit, Bluetooth RF transceiver module, and gives bluetooth cellular phone with data packet form by antenna transmission.When receiving calls, bluetooth cellular phone sends signal, receives through antenna and passes to the Bluetooth RF transceiver module, realizes speech communication by the circuit of back again.The circuit operation of audio frequency switching part is identical when wherein getting phone and receiving calls, as long as the signal input is promptly arranged, frequency switch circuit will move.
As shown in Figure 2, a kind of circuit diagram for the utility model enforcement, when hands-free device receives signal, carry out signal processing (D/A switch) by Bluetooth RF transceiver module MSM7731, and signal is defeated by MCI145483 carries out the decoding/encoding processing, between microprocessor PIC16C63 and the bluetooth module, by the I/O interface circuit in succession, carry out exchanges data between bluetooth module and the decoding/encoding device MCI145483.When having signal to input or output, microprocessor the 2nd pin will be exported control signal, when being output as high level, by two triode Q203, the circuit with switching function that Q402 forms ends, relay SS16 is failure to actuate, when being output as high level, two triode conductings, relay SS16 action, automobile audio is muted, when end of conversation, the signal that microprocessor PIC16C63 provides during according to end of conversation is from low level of its 2nd pin output, the switching function circuit ends, relay SS16 recovers the state before the action, and the automobile audio mute state is removed, thus the implement device hand-free function.When using earphone receiving,, detect through handling by signal of earphone input, by microprocessor PIC16C63 the 2nd pin output high level, make drive circuit quiet, and control by microprocessor PIC16C63 to sound equipment, audio signal is exported by earphone, realized the switching between hands-free and the earphone.Wherein earphone is that configuration device can be selected in the outside, is connected by interface with main frame.Microphone and hands-free between conversion be to give control signal of microprocessor PIC16C63 when utilize using microphone, and by microprocessor PIC16C63, audio signal switches to microphone output.More than two kinds of switchings be to utilize the mode of software to control.
Claims (2)
1, a kind of hands-free device with Bluetooth function, it is characterized in that containing: bluetooth host, microphone, earphone, antenna, microphone, and available automobile audio, the right front loudspeaker of automobile, its method of attachment is: microphone, earphone, microphone, automobile audio, the right front loudspeaker of automobile utilize the mode of Peripheral Interface to be connected with bluetooth host, and antenna is to be connected with bluetooth host by lead.
2, bluetooth handsfree as claimed in claim 1 is characterized in that the switching mode of the voicefrequency circuit in the bluetooth host, and the analog circuit that utilizes two triodes to be combined into to have switching function is as the drive circuit of frequency switch circuit, and relay is a performer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03273295 CN2796254Y (en) | 2003-08-08 | 2003-08-08 | Blue tooth hand-free device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03273295 CN2796254Y (en) | 2003-08-08 | 2003-08-08 | Blue tooth hand-free device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2796254Y true CN2796254Y (en) | 2006-07-12 |
Family
ID=36814001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03273295 Expired - Fee Related CN2796254Y (en) | 2003-08-08 | 2003-08-08 | Blue tooth hand-free device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2796254Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059992A (en) * | 2010-12-29 | 2011-05-18 | 东莞市石碣志业电子有限公司 | Vehicle-mounted bluetooth wiring harness |
| CN104320562A (en) * | 2014-11-20 | 2015-01-28 | 天津光电通信技术有限公司 | Fax control system |
-
2003
- 2003-08-08 CN CN 03273295 patent/CN2796254Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059992A (en) * | 2010-12-29 | 2011-05-18 | 东莞市石碣志业电子有限公司 | Vehicle-mounted bluetooth wiring harness |
| CN102059992B (en) * | 2010-12-29 | 2012-12-05 | 东莞市石碣志业电子有限公司 | Vehicle-mounted bluetooth wiring harness |
| CN104320562A (en) * | 2014-11-20 | 2015-01-28 | 天津光电通信技术有限公司 | Fax control system |
| CN104320562B (en) * | 2014-11-20 | 2018-06-01 | 天津光电通信技术有限公司 | A kind of fax control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |