There is the bluetooth equipment of Multifunctional coilTechnical field
This patent relates to bluetooth equipment field, particularly, and particularly a kind of bluetooth equipment with Multifunctional coil.
Background technology
Bluetooth earphone with NFC function is more and more universal, after NFC near field contact, connects code without input, can directly realize being connected of bluetooth and equipment.
The scheme that wireless charging and NFC share same coil is also ripe.
The hearing aids of low side cannot be realized the compensation of hearing test curve, and the use initial stage of senior hearing aids needs professional tester to carry out hearing test, and then hearing compensation curve is write to hearing aids, and operation is wasted time and energy.The combination of hearing aids and bluetooth earphone has been reported, but use is not very convenient.
Utility model content
The object of this patent is, proposes the scheme that bluetooth and hearing-aid function automatically switch, and utilizes the design of Multifunctional coil, to realize wireless charging, NFC, and comprise the function of the transmitting voice signal of hearing aids compatibility, and utilize the chip that carries of system to realize hearing test and compensation.
To achieve these goals, according to this patent aspect, provide a kind of bluetooth equipment with Multifunctional coil.Comprise: coil, microphone unit, battery, loud speaker, Bluetooth antenna, wireless charging and Power Management Unit, NFC unit, audio decoding unit, bluetooth unit, switch control unit, hearing compensation amplifying unit, audio demodulation unit.
The bluetooth equipment of this patent comprises: multifunctional thread coil unit, and for wireless charging, the transmission of the information such as NFC and voice; Multifunctional thread coil unit is connected with wireless charging unit, NFC unit, audio demodulation unit, control switch unit; Wireless charging unit comprises battery management unit, and connects battery unit; NFC unit is for near-field communication identification; The audio coding signal that audio decoding unit decoding comes from NFC unit.The audio-frequency information that audio demodulation unit is crossed for demodulation Multifunctional coil cells modulate; Control switch unit, audio demodulation unit, audio decoding unit are connected, and realize audio signal modulation and the switching of the audio signal of encoding.Microphone unit is for picking up the audio signal of surrounding environment, and it connects control switch unit and bluetooth unit; Bluetooth unit access Bluetooth antenna, the downstream tones termination of bluetooth unit enters control switch unit; So far there are four class signal inputs control switch unit, is respectively microphone unit, downstream tones end, audio demodulation unit and the audio decoding unit of bluetooth unit.Hearing compensation amplifying unit is received in the output of control switch unit, then receives loudspeaker unit.
Bluetooth can connect fast by the mode of NFC.In the time using for the first time, can coordinate the signal of mobile terminal playing 200Hz to 20KHz, by Bluetooth transmission to loud speaker, realize audiometery, then draw hearing compensation curve, and be stored in hearing compensation amplifying unit, in all functions afterwards, use this hearing compensation curve.
In the time of holding state, control switch is connected microphone, thereby enters hearing compensation amplifying unit, and bluetooth enters holding state, and now equipment uses as the hearing aids of general mode.
In the time sending a telegram here or have information, control switch is connected the downstream tones end of bluetooth unit, thereby enters hearing compensation amplifying unit, and bluetooth enters operating state, and now equipment uses as the bluetooth equipment of general mode.
In the time sending a telegram here or have information, if mobile terminal is near the equipment of this patent, NFC matches so, and now Multifunctional coil element coupling enters audio electrical signal, control switch is connected the audio demodulation unit that multifunctional thread coil unit connects, realize common hearing aids T work pattern.Now, also can carry out in the mode of NFC the information of transfer encoding, decode by audio decoding unit, control unit accessing to audio decoding unit, realizes the demodulation of information and reports.In communication process, detect and whether have the frequency of NFC signal to exist by NFC, if this equipment of communication equipment principle, NFC blackout so, this equipment switches to bluetooth mode, if NFC signal reappears, switches so loop line circle coupled mode.
When equipment is during near wireless charging device, wireless charging device recognizes this equipment, completes and matches and carry out wireless charging.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of this patent.
Fig. 2 is the theory diagram of the control switch unit of this patent.
Fig. 3 is the hearing compensation curve testing process of this patent.
Fig. 4 is the workflow diagram of this patent.
Fig. 5 is the demodulator circuit schematic diagram of the audio amplitude modulation signal of this patent.
Fig. 6 is the demodulator circuit schematic diagram of the audio frequency D class power amplifier PWM modulation signal of this patent.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Shown in Figure 1, be the schematic block circuit diagram of this patent.
As shown in Figure 1, a kind of bluetooth equipment, comprising: coil 1, microphone unit 2, battery 3, loud speaker 4, Bluetooth antenna 5, wireless charging and Power Management Unit 6, NFC unit 7, audio decoding unit 8, bluetooth unit 9, switch control unit 10, hearing compensation amplifying unit 11, audio demodulation unit 12.
Coil 1, for wireless charging, the transmission of the information such as NFC and voice; Coil 1 and wireless charging and Power Management Unit 6, NFC unit 7, audio decoding unit 8, audio demodulation unit 12 are connected; Wireless charging and Power Management Unit 6 comprise battery management unit, and connect battery unit 3; NFC unit 7 is identified for near-field communication; The audio-frequency information that the NFC unit 7 that audio decoding unit 8 is crossed for other NFC device coding of decoding transmits; Control switch unit 10 is connected with audio decoding unit 8 and audio demodulation unit 12, realizes the switching of the audio signal that audio signal modulation or NFC encoded.Microphone unit 2 is for picking up the audio signal of surrounding environment, and it connects control switch unit 10 and bluetooth unit 9; Bluetooth unit 9 accesses Bluetooth antenna 5, and the downstream tones termination of bluetooth unit 9 enters control switch unit 10; So far there are four class signal inputs control switch unit 10, is respectively microphone unit 2, the downstream tones end of bluetooth unit 9, audio demodulation unit 12 and audio decoding unit 8.Hearing compensation amplifying unit 11 is received in the output of control switch unit 10, then receives loud speaker 4.
Audio demodulation unit 12 is being controlled in control switch unit 10, microphone unit 2, and the selection of audio decoding unit 8 and bluetooth unit 9 downstream tones, thus realize hearing aids T pattern compatibility, hearing aids, audio-frequency information transmission and bluetooth conversation function.As shown in Figure 2, switch 101 ends connect hearing compensation amplifying unit 11, thereby when switch terminals 101 turn on-switch ends 102 connection bluetooth units 9, realize Bluetooth audio frequency and connect.When thereby switch terminals 101 turn on-switch ends 103 connect microphone unit 2, realize ambient sound to loud speaker, thereby realize function of hearing aid.When switch terminals 101 turn on-switch ends 104 and then connection audio demodulation unit 12, realize the audio signal of modulation to loud speaker, thereby realize hearing aids T mode capabilities.When switch terminals 101 turn on-switch ends 105, thereby connect audio decoding unit 8, realize the audio signal of coding to loud speaker, thereby realize the decoding function of the audio signal that NFC encoded.
Fig. 3 is the hearing compensation curve testing process of this patent.
Bluetooth can be connected with mobile terminal fast by the mode of NFC.In the time using for the first time, can, by the signal of mobile terminal playing 200Hz to 20KHz, transfer to loud speaker 4 by bluetooth 9, realize audiometery, then draw hearing compensation curve, and be stored in hearing compensation amplifying unit 11, in all functions afterwards, use this hearing compensation curve.When test, adopt the mode of pure tone frequency sweep, adjust voluntarily volume by auditor, until hear very faint pure tone, this volume is exactly the audiometric curve of this Frequency point, and then system determines the compensation volume of this point according to the volume of exporting pure tone at this.
Fig. 4 is the workflow diagram of this patent.In the time of holding state, switch control unit 10 control switchs are connected microphone 2, thereby enter hearing compensation amplifying unit 11, and bluetooth unit 9 enters holding state, and now equipment uses as the hearing aids of general mode.
In the time sending a telegram here or have information, switch control unit 10 is connected the downstream tones end of bluetooth unit 9, thereby enters hearing compensation amplifying unit 11, and bluetooth enters operating state, and now equipment uses as the bluetooth equipment of general mode.
In the time sending a telegram here or have information, if mobile terminal is near the equipment of this patent, NFC unit 7 matches so, then now coil 1 is coupled into audio electrical signal, audio electrical signal can adopt the mode of AM amplitude modulation to comprise audio signal and NFC frequency signal, also can adopt as the mode of D class power amplifier PWM modulation, realize demodulation in audio demodulation unit 12.If audio electrical signal adopts the mode of AM amplitude modulation, can adopt the typical amplitude-modulated signal demodulator circuit shown in Fig. 5, D1 is diode, and C1 is electric capacity, and R1 is load.If audio electrical signal adopts as the mode of D class power amplifier PWM modulation, can adopt the typical signal demodulating circuit shown in Fig. 6, L1, L2 are inductance, RL is load.Switch control unit 10 is connected audio demodulation unit 12, realize common hearing aids T work pattern.Now, also can carry out in the mode of NFC the information of transfer encoding, decode by audio decoding unit 8, switch control unit 10 accessing to audio decoding units 8, realize the demodulation of information and report.
In communication process, detect and whether have the frequency of NFC signal to exist by NFC, if this equipment of communication equipment principle, NFC blackout so, this equipment switches to bluetooth mode, if NFC signal reappears, switches so loop line circle coupled mode.
When equipment is during near wireless charging device, wireless charging device recognizes this equipment, is completed and is matched and carry out wireless charging by wireless charging and Power Management Unit 6.