Summary of the invention
The purpose of this invention is to provide a kind of and the supporting use of bluetooth cellular phone can hand-free call and can unite with computer again at different time and to use the Bluetooth loudspeaker that carries out Internet phone-calling.
The technical scheme that realizes the object of the invention is:
A kind of Bluetooth loudspeaker has button and circuit arrangement; Circuit arrangement has bluetooth module, Bluetooth antenna, audio amplifier circuit, loud speaker, microphone and power-supply system; Bluetooth antenna is connected with bluetooth module; Audio amplifier circuit is electrically connected with loud speaker; Its design feature is: circuit arrangement also has hands-free chip, USB interface and earphone interface; USB interface is electrically connected with hands-free chip, and the interface that is connected of the USB interface computer that is to use Shi Yuke to dial network telephone; Hands-free chip is electrically connected with bluetooth module is two-way; Microphone is electrically connected with hands-free chip, and hands-free chip is electrically connected with audio amplifier circuit by earphone interface; Power-supply system is electrically connected with hands-free chip and bluetooth module respectively.
Above-mentioned power-supply system comprises power supply management circuit, charge management circuit and the lithium battery of mutual electrical connection, and the power supply management circuit is electrically connected with hands-free chip and bluetooth module respectively.
The USB interface of foregoing circuit device is electrically connected with charge management circuit and power supply management circuit.
Above-mentioned panel button comprises power key, answers key, hangs up/pairing key and volume adjusting key; Power key and power supply management circuit are electrically connected, answer key, hang up/and pairing key is connected with bluetooth module respectively with the volume adjusting key.
The model of above-mentioned charge management circuit is BQ24103, and the model of power supply management circuit is PIC12F675, and the model of hands-free chip is FM1072LP, and the model of bluetooth module is BC417143B.
The good effect that the present invention has: the circuit arrangement of (1) Bluetooth loudspeaker of the present invention has hands-free chip, can be when using hands-freely receive calls or realize that many people converse simultaneously with bluetooth cellular phone pairing, and above-mentioned hands-free chip model is that FM1072LP has good echo inhibit feature, supports full duplex call preferably; (2) circuit arrangement of the present invention also has USB interface, can interconnect with computer to carry out Internet phone-calling, and its hand-free function can realize that many people converse simultaneously simultaneously.
See Fig. 1, Bluetooth loudspeaker of the present invention comprises casing, panel button 2 and circuit arrangement 3, the foregoing circuit device has bluetooth module 31, Bluetooth antenna 32, hands-free chip 33, audio amplifier circuit 34, USB interface 35, loud speaker 36, microphone 37 and power-supply system 5, and power-supply system 5 has charge management circuit 52, power supply management circuit 51 and lithium battery 53; Hands-free chip 31 and bluetooth module 33 two-way electrical connections, audio amplifier circuit 34 is connected with hands-free chip 33 respectively with microphone 37, and loud speaker 36 connects and is connected with audio amplifier circuit 34, and Bluetooth antenna 32 is connected with bluetooth module 31; The charge management circuit 52 of above-mentioned power-supply system 5, power supply management circuit 51 and lithium battery 53 interconnect successively, power supply management circuit 51 is connected with bluetooth module 31 with hands-free chip 33 respectively, the USB interface 35 of circuit arrangement 3 is connected with hands-free chip 33, charge management circuit 52 and power supply management circuit 51 respectively, between audio amplifier circuit 34 and hands-free chip 33, also be provided with earphone interface, no matter this Bluetooth loudspeaker is in and mobile phone pairing work state or networking telephone state, and the user can use earphone to converse as required; The model of above-mentioned charge management circuit 52 is BQ24103, and the model of power supply management circuit 51 is PIC12F675, and the model of hands-free chip 33 is FM1072LP, and the model of bluetooth module 31 is BC417143B.
Above-mentioned panel button 2 comprises power key 21, answers key 22, hangs up/pairing key 23 and volume adjusting key 24, the power supply management circuit 51 of power key 21 and power-supply system 5 is connected, answer key 22, hang up/pairing key 23 is connected with bluetooth module 31 respectively with volume adjusting key 24, the above-mentioned key 22 of answering also has different functions under different pressed state, such as the clawback function, volume adjusting key 24 minutes "+", "-" can regulate the volume height in communication process.Also be provided with bluetooth state indicator light, press key lamp and indicator of the power supply status on the casing of Bluetooth loudspeaker of the present invention, the bluetooth state indicator light is used to refer to the operating state of bluetooth module 31, such as being shown as Chang Liang with bluetooth cellular phone pairing process, and standby or conversation the time are the flicker of different frequency, and indicator of the power supply status is used for indicating what and charged state of electric weight.
This Bluetooth loudspeaker has two kinds of mode of operations, and one is and the conversation mode of operation of bluetooth cellular phone pairing, and two is to be connected by network with computer to carry out the BlueDrama pattern.With bluetooth cellular phone pairing work pattern under, the user can receive calls or carries out many people videoconference by hand-free function by Bluetooth loudspeaker of the present invention is hands-free.Above-mentioned Bluetooth antenna 32 be used for bluetooth cellular phone in bluetooth module receive mutually or send for information about, when the user uses this Bluetooth loudspeaker to receive calls, Bluetooth antenna 32 is used for receiving the incoming information that mobile phone sends and is transferred in the bluetooth module 31, bluetooth module 31 will send to hands-free chip 33 after will passing through the incoming information decoding of encoding, and calling voice information sends to audio amplifier circuit 34 and plays back in loud speaker 36 at last after hands-free chip 33 is through the D/A conversion; On the contrary, user's sound will be transported in the hands-free chip 33 by microphone 37, and the used hands-free chip 33 of the present invention is supported two microphone microphones, can more effective transmission user speech, hands-free chip 33 the is integrated echo number word signal processing circuit that disappears (DSP circuit) that embeds, can prevent effectively that the sound that transmits from returning into microphone 37 and conversation is caused echo interference from loud speaker 36, make this Bluetooth loudspeaker have good full-duplex preformance, conversion is admitted in the bluetooth module 31 voice messaging in the hands-free chip 33 through A/D, is sent on the bluetooth cellular phone by Bluetooth antenna 32 through coding then.
When this Bluetooth loudspeaker is used for being connected with computer when carrying out Internet phone-calling, only need to use the USB interface 35 of special-purpose USB wiring connection Bluetooth loudspeaker and the USB output interface of computer, then the mixer apparatus under " sound playing " on the computer and " recording " Default device and broadcast and the recording state all being set to " USB Audio Device " gets final product, the Bluetooth loudspeaker start detects the hands-free chip 33 of USB interface 35 connection back auto-initiations and is operated in the USB pattern, it is the Internet phone-calling pattern, certainly under this operating state, this Bluetooth loudspeaker can be used as the speaker operation of computer fully, just when operating computer dials network telephone, promptly realize hands-free Internet phone-calling, under above-mentioned Internet phone-calling operating state, the partner voice signal is delivered to audio amplifier circuit 34 at hands-free chip 33 through the D/A conversion and plays back from loud speaker 36; User's reply then by microphone 37 enter hands-free chip 33 through A/D conversion input computer again through Network Transmission to the other side, the echo function that disappears owing to DSP circuit in the hands-free chip 33 has guaranteed good full-duplex preformance in the Internet phone-calling process equally.
See Fig. 2, be the pairing flow chart of Bluetooth loudspeaker start use of the present invention with bluetooth cellular phone.This pairing process need bluetooth cellular phone one biconditional operation is realized, described flow chart is the routine processes process that occurs on this Bluetooth loudspeaker, step 201 is opened the Bluetooth loudspeaker power key, system's (Bluetooth loudspeaker) can judge at first whether USB interface 35 connects, if not then the hands-free chip 33 of initialization is operated in the bluetooth cellular phone call mode, step 202 system sends the pairing connection request, step 203 has judged whether connected mobile phone, if connected mobile phone is arranged then carry out step 212 and judge and the whether successful connection of this mobile phone, there is not connected mobile phone then to enter holding state (step 204), whether step 213 is then judged successful with being connected of mobile phone, successful then enter and bluetooth cellular phone connection status (step 213), there is not successful connection then to get back to step 204 (holding state); Above step is all finished automatically by the bluetooth module 31 of system, so that search whether there is the bluetooth cellular phone that has connected before the pairing again, step 205 judges whether panel button 2 has input operation, do not return holding state, there is the button input just to enter next step, if closing key (power key 21) input (step 206), then carry out power-off operation, if bluetooth module 31 receives pairing key 23 input operations (step 208), then bluetooth module is carried out matching operation, system enters pairing state (step 209), this moment bluetooth state indicator light Chang Liang, need to wait for the associative operation of the bluetooth cellular phone of pairing with it this moment, step 210 is judged the connection request that has or not bluetooth cellular phone to send, connect signal if there is bluetooth cellular phone to send out pairing, then enter step 212 and judge the whether success that is connected between mobile phone and the Bluetooth loudspeaker, if there is not the connection request signal of outside bluetooth cellular phone, then execution in step 211 judges whether the pairing state of Bluetooth loudspeaker is overtime, then do not get back to step 209 from newly entering the pairing state, overtime step 204 holding state that then returns.Because the pairing process relates to the associative operation of bluetooth cellular phone, so specifically the operating procedure of mobile phone is different, but connection procedure between the two is consistent, and above connection procedure makes sets up the transmission of wireless signals passage between the signal transmitting and receiving element of the bluetooth module 31 of Bluetooth loudspeaker and bluetooth cellular phone.
See Fig. 3, realize the flow chart of conversation for this Bluetooth loudspeaker.Step 301 system is in and bluetooth cellular phone pairing connection status, step 302 judges whether Outgoing Call or incoming call is arranged, judged whether button operation (step 303) simultaneously, if there is not also incoming call then return 301 not of the phone transferred in the step 302, the phone of dial-out is arranged or sends a telegram here then that bluetooth module 31 enters dialing or comes electricity condition mode of operation (step 304); There is not button operation then to return 301 in the step 303, there is button operation then to continue, if whether successfully redial key input (step 305) then further judges this key input (step 308), (described redial key is promptly answered key 22, the last phone of transfering to of the automatic clawback of system when the long period is pinned this and answers key 22), successful then enter dialing or come electricity condition mode of operation (step 304), unsuccessful then put back to button decision operation (step 303); If whether successfully step 303 button operation is phonetic dialing key (306) then judges this key input (step 309) equally, (described phonetic dialing key is all and answers key 22, this answers flicking key 22 systems and can carry out phonetic dialing, this function needs matching used bluetooth cellular phone to possess voice dial-up function), successful then enter dialing or come electricity condition mode of operation (step 304), unsuccessful then put back to case button operation judgement (step 303); Continue in step 304, whether bluetooth module 31 is further judged dialing or is sent a telegram here overtime in step 307, overtimely then return 301, then do not judged whether the button input in step 310, then not returning step 304 enters dialing or comes the electricity condition mode of operation, there is the button input then further to judge keystroke categories, step 311 is if the hang-up key input system is then returned step 301, step 312 then enters talking state (step 315) if answer key, and step 313 is if closing key (power key 21) is then carried out power-off operation (314).
This Bluetooth loudspeaker can be applied to automotive environment or multi-conference occasion, also can and carry out the bilateral network conversation as the loud speaker input audio signal of computer, equally can multi-conference.The USB interface 35 of this Bluetooth loudspeaker not only can be used for being connected with computer in addition, can also be used for charging to this Bluetooth loudspeaker as charging inlet.