CN206674178U

CN206674178U - A kind of onboard system of 4G communication functions

Info

Publication number: CN206674178U
Application number: CN201720413930.9U
Authority: CN
Inventors: 刘钟飞
Original assignee: HUIZHOU CHUNGSUNG AUTO ELECTRONIC Co Ltd
Current assignee: HUIZHOU CHUNGSUNG AUTO ELECTRONIC Co Ltd
Priority date: 2017-04-19
Filing date: 2017-04-19
Publication date: 2017-11-24
Anticipated expiration: 2027-04-19

Abstract

The utility model discloses a kind of onboard system of 4G communication functions, including for receiving the microphone of customer voice input, the microphone includes the PCB components in housing and housing；The PCB components include pcb board and the MEMS silicon microphone electronic device being connected on pcb board；It is characterized in that：The outside of the housing is provided with a resonant cavity, has opening on the outside of resonant cavity；Open outer side covers Air Filter；The bottom of resonant cavity, which is provided with, some adopts sound hole；The MEMS silicon microphone electronic device is located at the inner side for adopting sound hole；One vibrating diaphragm is installed in the resonant cavity, between the vibrating diaphragm is located at Air Filter and adopts sound hole, microphone collection acoustic sensitivity can be improved.

Description

A kind of onboard system of 4G communication functions

Technical field

It the utility model is related to vehicle electronics technology, and in particular to a kind of onboard system of 4G communication functions.

Background technology

With the progress and the reach of science of society, hands-free voice processing apparatus is had been applied in automobile.Especially The development of the 4G communication technologys, carry out condition for the elevator belt of onboard system phonetic function.Handsfree car voice system can be by bluetooth Module, vehicle audio and car microphone composition, vehicle handfree microphone can realize the wireless communication function of driver, be expert at Hand-free call can be realized by hands-free microphone in sailing, the security of driver in motion can be improved, liberate driver Both hands, driver is absorbed in driving vehicle.Publication No. CN2854991 utility model patent, which disclose one Kind of vehicle handfree microphone, the microphone use electret mode, but electret microphone can make after a long time use it is sensitive Degree reduces.Notification number CN203968375U utility model patent, a kind of vehicle-mounted silicon microphone assembly is which disclose, For silicon microphone, including microphone casing body, electro-acoustic transducing device, dust-proof mesh enclosure, circuit board and wire harness, microphone casing body is cavity Structure, dust-proof mesh enclosure wrap microphone casing body, electro-acoustic transducing device and circuit board arrangement in microphone case body, electroacoustic transducer Part is MEMS silicon microphone electronic device, and MEMS silicon microphone electronic device is connected with circuit board.But the Mike of prior art Wind is limited to volume, and it is too small especially to adopt sound hole, generally with sensitivity it is low the problem of, urgent need to resolve.

The content of the invention

In view of this, the utility model provides a kind of device for improving microphone collection acoustic sensitivity.

The purpose of this utility model is realized by following technology：A kind of onboard system of 4G communication functions, including for connecing The microphone of customer voice input is received, the microphone includes the PCB components in housing and housing；The PCB components include Pcb board and the MEMS silicon microphone electronic device being connected on pcb board；The outside of the housing is provided with a resonant cavity, resonance There is opening on the outside of chamber；Open outer side covers Air Filter；The bottom of resonant cavity, which is provided with, some adopts sound hole；The MEMS silicon microphone Electronic device is located at the inner side for adopting sound hole；One vibrating diaphragm is installed, the vibrating diaphragm is located at Air Filter and adopts sound hole in the resonant cavity Between.

The utility model especially sets resonant cavity in the outside of shell, and the resonant interaction of resonant cavity and vibrating diaphragm therein can be with Effectively partial enlargement adopts the voice signal around sound hole, and then improves the sensitivity of microphone.The MEMS silicon microphone electricity Sub- device, PCB etc. can use prior art to realize, the technical problem for solving the application is not contributed, repeated no more.

Further, described adopt is provided with rubber layer between sound hole and MEMS silicon microphone electronic device；Opened up in rubber layer There is through hole corresponding with adopting sound hole.

Mobile unit is typically easy to shake in work process.To avoid MEMS silicon microphone electronic device from colliding Damage, the utility model is especially provided with rubber layer, damping vibration adopting between sound hole and MEMS silicon microphone electronic device； Through hole corresponding with adopting sound hole is offered in rubber layer, reduces loss of the rubber layer to sound transmission.

Further, the MEMS silicon microphone electronic device includes MEMS tiny currents and micro- integrated turn of MEMS Circuit is changed, MEMS tiny currents are connected with the micro- integrated converting circuits of MEMS；Be welded with the pcb board filtering and eliminating noise circuit and Potentiometer adjusts circuit；Filtering and eliminating noise circuit, potentiometer regulation circuit and MEMS silicon microphone electronic device are connected two-by-two.

MEMS tiny currents include silicon vibrating diaphragm device and silicon backplane device, and silicon vibrating diaphragm device and silicon backplane device receive Sound is simultaneously micro- by MEMS to the micro- integrated converting circuits of MEMS, the micro- integrated converting circuits of MEMS by the audio signal transmission received The audio signal of capacitance sensor transmission is changed and amplified.The micro- integrated converting circuits of MEMS are connected with filtering and eliminating noise circuit, The micro- integrated converting circuits of MEMS are by the audio signal transmission changed and amplified to filtering and eliminating noise circuit so that after filtering except making an uproar Electric signal matches with vehicle power circuit.

Preferably, in addition to switch selection circuit, its input are connected with the microphone output end；With the switch First output end of selection circuit is connected, the Echo Canceller to phonetic entry progress echo cancellor and noise reduction；With institute State the phone that Echo Canceller is connected, is transmitted to the phonetic entry after the Echo Canceller echo cancellor and noise reduction Speech transmitting；It is connected with the second output end of the switch selection circuit, the language to phonetic entry progress speech recognition Sound identifier；It is connected with the control terminal of the switch selection circuit, is triggered by wake-up signal by the switch selection circuit Input switches to the controller of second output end；The call voice transmitter includes 4G call voice transmitters.

Microphone is connected to the input of switch selection circuit, and Echo Canceller is connected into the of switch selection circuit One output end, speech recognition device is connected to the second output end of switch selection circuit, the control terminal connection of switch selection circuit Controller, controller are triggered by wake-up signal, the input of switch selection circuit are switched into the second output end, i.e., in voice In the case of identification, the phonetic entry that microphone receives is transmitted directly to speech recognition device, before not through echo The noise reduction process of arrester, so as to influence of the distortion to speech recognition device caused by avoiding noise reduction.4G call voice transmitters Prior art can be selected to realize.

Brief description of the drawings

Fig. 1 is the utility model structure diagram.

Fig. 2 is the utility model partial enlarged drawing.

Fig. 3 is the block diagram of the utility model.

Embodiment

For the ease of it will be appreciated by those skilled in the art that making below in conjunction with accompanying drawing and embodiment to the present invention further detailed Thin description：

Embodiment 1

The present embodiment provides a kind of onboard system of 4G communication functions, such as Fig. 1 and Fig. 2, including for receiving customer voice The microphone of input, the microphone include the PCB components in housing 1 and housing；The PCB components include pcb board 2 and The MEMS silicon microphone electronic device 3 being connected on pcb board 2；The outside of the housing 1 is provided with a resonant cavity 4, resonant cavity 4 There is opening in outside；Open outer side covers Air Filter 41；The bottom of resonant cavity 4, which is provided with, some adopts sound hole 42；The MEMS silicon Mike Wind electronic device 3 is located at the inner side for adopting sound hole 42；One vibrating diaphragm 43 is installed, the vibrating diaphragm 43 is positioned at dust-proof in the resonant cavity 4 Net 41 and adopt between sound hole 42.

Further, described adopt is provided with rubber layer 5 between sound hole and MEMS silicon microphone electronic device；Opened up in rubber layer There is through hole 51 corresponding with adopting sound hole 42.

Preferably, the MEMS silicon microphone electronic device includes MEMS tiny currents and the micro- integrated conversion electricity of MEMS Road, MEMS tiny currents are connected with the micro- integrated converting circuits of MEMS；Filtering and eliminating noise circuit and current potential are welded with the pcb board Device adjusts circuit；Filtering and eliminating noise circuit, potentiometer regulation circuit and MEMS silicon microphone electronic device are connected two-by-two.

Further, Fig. 3 shows the structured flowchart of the voice processing apparatus of the present embodiment, includes but is not limited to：Wheat Gram wind, switch selection circuit, Echo Canceller, call voice transmitter, speech recognition device, power amplifying player, controller.Its In, microphone can be used for the phonetic entry for receiving user, and the phonetic entry can be the phonetic entry under telephony mode, that is, use Phonetic entry of the family during telephone relation；Can also be the phonetic entry under speech recognition mode, that is, be used for by using The phonetic entry at family carries out the processes such as the playback after acoustic control, identification.The input of switch selection circuit is connected with microphone, can use In receiving phonetic entry from microphone, its first output end is connected with Echo Canceller, its second input and speech recognition device It is connected, its control terminal is connected with controller.Input can be switched to by switch selection circuit according to the control of controller One output end or the second output end, i.e., the phonetic entry sent microphone are transmitted to Echo Canceller or speech recognition device. In one embodiment, switch selection circuit can include either-or switch, i.e., using either-or switch come realize input with Switching between output.In another embodiment, switch selection circuit can also be realized using MUX.Echo disappears Except device is connected with the first output end of switch selection circuit, phonetic entry can be carried out in the phone mode echo cancellor and Noise reduction.Specifically, Echo Canceller can use, echo suppresses, acoustic echo eliminates (Acoustic Echo Cancellor) Or mode known to other skilled in the art, carry out echo cancellor, noise reduction etc. to inputting phonetic entry therein Reason.The call voice transmitter includes 3G call voice transmitters.

It is the wherein specific implementation of the present invention above, its description is more specific and detailed, but can not therefore manage Solve as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, do not departing from On the premise of present inventive concept, various modifications and improvements can be made, these obvious alternative forms belong to this hair Bright protection domain.

Claims

1. a kind of onboard system of 4G communication functions, including for receiving the microphone of customer voice input, Mike's bellows chamber Include the PCB components in housing and housing；The PCB components include pcb board and the MEMS silicon microphone being connected on pcb board Electronic device；It is characterized in that：The outside of the housing is provided with a resonant cavity, has opening on the outside of resonant cavity；Open outer side is covered Lid Air Filter；The bottom of resonant cavity, which is provided with, some adopts sound hole；The MEMS silicon microphone electronic device is located at the inner side for adopting sound hole； One vibrating diaphragm is installed, the vibrating diaphragm is located at Air Filter and adopted between sound hole in the resonant cavity.

2. the onboard system of 4G communication functions according to claim 1, it is characterised in that：It is described to adopt sound hole and MEMS silicon wheats Rubber layer is provided between gram wind electronic device；Through hole corresponding with adopting sound hole is offered in rubber layer.

3. the onboard system of 4G communication functions according to claim 1, it is characterised in that：The MEMS silicon microphone electronics Device includes MEMS tiny currents and the micro- integrated converting circuits of MEMS, MEMS tiny currents and the micro- integrated conversions of MEMS Circuit is connected；Filtering and eliminating noise circuit and potentiometer regulation circuit are welded with the pcb board；Filtering and eliminating noise circuit, potentiometer regulation Circuit and MEMS silicon microphone electronic device are connected two-by-two.

4. the onboard system of 4G communication functions according to claim 1, it is characterised in that：Also include switch selection circuit, Its input is connected with the microphone output end；It is connected with the first output end of the switch selection circuit, to the voice Input carries out the Echo Canceller of echo cancellor and noise reduction；It is connected with the Echo Canceller, to through the Echo Canceller The call voice transmitter that phonetic entry after echo cancellor and noise reduction is transmitted；With the second of the switch selection circuit Output end is connected, the speech recognition device to phonetic entry progress speech recognition；With the control of the switch selection circuit End is connected, the controller that the input of the switch selection circuit is switched to second output end is triggered by wake-up signal； The call voice transmitter includes 4G call voice transmitters.