CN107644635A - In-car active noise reduction system - Google Patents
In-car active noise reduction system Download PDFInfo
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- CN107644635A CN107644635A CN201710991767.9A CN201710991767A CN107644635A CN 107644635 A CN107644635 A CN 107644635A CN 201710991767 A CN201710991767 A CN 201710991767A CN 107644635 A CN107644635 A CN 107644635A
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- noise reduction
- active noise
- interface
- cabling
- mixer
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Abstract
The present invention provides a kind of in-car active noise reduction system, including：Speed probe, active noise reduction controller, mixer, power amplifier, error microphone, vehicle-mounted loudspeaker, onboard audio processing module, automobile CAN interface, ceiling cabling and carpet cabling；Speed probe is connected to automobile CAN interface and connects active noise reduction controller by carpet cabling, error microphone is placed at ceiling and is connected by ceiling cabling with active noise reduction controller, active noise reduction controller is arranged at automobile trunk, active noise reduction controller exports four tunnel active noise reduction voice signals, export to mixer, then exported after mixer to the front left interface of vehicle power amplifier, front right interface, rear left interface, rear right interface and interface of the ground wire first；The output of active noise reduction controller is connected to mixer by carpet cabling；The present invention farthest reduces the transformation to former car, and the connection of active noise reduction system hardware and arrangement are simple, convenient to implement.
Description
Technical field
The present invention relates to the connection of in-car active noise reduction system and arrangement, belongs to professional active noise controlling field.
Background technology
Vehicle level of NVH directly influences the riding experience of passenger, and quiet comfortable environment inside car is just turning into more and more
The pursuit of driver.Traditional passive solution is mainly carried out by sound insulation, vibration isolation, noise elimination and the noise reduction technology such as absorb sound
Noise reduction, these technologies are obvious for the noise reduction of high frequency, but not satisfactory for irritating all-bottom sound, and actively
It is good for Frequency effect that noise control technique mainly has in terms of for automobile noise, it will be apparent that specific aim and is advantageous to vapour
Car lightweight conveniently has the advantages of obvious.
At present both at home and abroad producer and the team of research active noise reduction techniques also compared with it is more, it is external to have had comparative maturity
Commodity application, and be useful in more money vehicles, domestic relevant manufactures are also actively being studied, but do not have the business of maturation also
Released with product is changed, be also mostly in theoretical research stage.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of in-car active noise reduction system, change
Enter connection and arrangement, farthest reduce the transformation to former car, the connection of active noise reduction system hardware and arrangement letter
It is single, it is convenient to implement, and hardware cost is controlled well, while active noise reduction, additionally it is possible to realize that normal music is broadcast
Playing function.The technical solution adopted by the present invention is：
A kind of in-car active noise reduction system, including：Speed probe, active noise reduction controller, mixer, power amplifier, mistake
Poor microphone, vehicle-mounted loudspeaker, onboard audio processing module, automobile CAN interface, ceiling cabling and carpet cabling；
Speed probe is connected to automobile CAN interface, and connects active noise reduction controller by carpet cabling, speed probe from
Automobile CAN interface is sent to active noise reduction sensor after collecting tach signal；
Four error microphones are respectively arranged at the left armrests of roof of the vehicle front row, at the right armrest of roof of the vehicle front row, vapour
At car roof heel row left armrests and at roof of the vehicle heel row right armrest, and active noise reduction is connected by ceiling cabling and controlled
Device；
Active noise reduction controller is arranged at automobile trunk, and active noise reduction controller exports four tunnel active noise reduction voice signals,
Export first to mixer, then after mixer, export the front left interface to vehicle power amplifier, front right interface, after
Left interface, rear right interface and interface of the ground wire, interface of the ground wire are common port；The output of active noise reduction controller is connect by carpet cabling
To mixer；
Mixer and vehicle power amplifier are arranged in automobile center console；
Before signal output front left, front right, rear left, rear right and the ground wire of onboard audio processing module and the signal output of mixer
A left side, front right, rear left, rear right and ground wire are connected in parallel respectively, are then separately input into the front left interface, preceding of vehicle power amplifier
Right interface, rear left interface, rear right interface and interface of the ground wire；Vehicle power amplifier is respectively outputted to front door after each signal is amplified
Left speaker, front door right speaker, back door left speaker and back door right speaker.
Further, the connected ceiling cabling of error microphone is consistent with the wire harness cabling on former car roof, from top
The edge on canopy both sides cabling, then active noise reduction controller is connected into through rear bulkhead by C posts from the front to the back.
Further, the bundle of outputs of active noise reduction controller leads to carpet at rear bulkhead, with walking under vehicle carpet
Line is consistent, and from the edge on carpet both sides cabling from the front to the back, is linked into after being introduced into console in mixer.
Further, vehicle power amplifier connects each loudspeaker by carpet cabling.
Further, the four tunnel active noise reduction voice signals that mixer exports to active noise reduction controller are filtered processing
Adjusted with impedance matching, the effect of impedance matching is that the energy of signal is adjusted so that active noise reduction voice signal and original
The music signal energy that car plays is suitable.
The advantage of the invention is that：
（1）Using the power amplifier and loudspeaker of former car, the transformation to former car is farthest reduced, it is hard to simplify control
Part simultaneously saves cost；
（2）The audio mixing of active noise reduction control signal and former car music signal is realized, vapour is nor affected on while active noise reduction
Car plays the function of music；
（3）Active noise reduction system is connected with arrangement simply, convenient to implement.
Brief description of the drawings
Fig. 1 is the structure arrangement schematic diagram of the present invention.
Fig. 2 is the electrical schematic diagram of the present invention.
Fig. 3 is the onboard audio processing module and mixer wiring schematic diagram of the present invention.
Embodiment
With reference to specific drawings and examples, the invention will be further described.
As shown in Figure 1 and Figure 2, the present invention provides a kind of in-car active noise reduction system, is mainly characterized by its connection and cloth
Put；
The system includes：Speed probe 1, active noise reduction controller 2, mixer 3, the error microphone 5 of power amplifier 4,6,
7th, 8, vehicle-mounted loudspeaker 9,10,11,12, onboard audio processing module 13, automobile CAN interface 14, ceiling cabling 15 and carpet are walked
Line 16；
Wherein, power amplifier 4, onboard audio processing module 13, automobile CAN interface 14, vehicle-mounted loudspeaker 9,10,11,12 are
The former vehicle device of automobile, remaining is all the Surface Mounted Device that in-car active noise reduction system is used；
Speed probe 1 is connected to automobile CAN interface 14, and active noise reduction controller 2 is connected by carpet cabling 16；Revolution speed sensing
The front end of device 1 is the CAN interface male of standard, and automobile CAN interface 14 is the female interface of standard, and both can plug together well；
Speed probe 1 is sent to active noise reduction sensor 2 after tach signal is collected at automobile CAN interface 14；
Four error microphones 5,6,7,8 are respectively arranged at the left armrests of roof of the vehicle front row, and the front-seat right side of roof of the vehicle is helped
At hand, at roof of the vehicle heel row left armrests and at roof of the vehicle heel row right armrest, and connected actively by ceiling cabling 15
Noise reduction controller 2；Specifically method for arranging is：In the corresponding installed position of ceiling, the square of a 2cm*2cm is cut out with cutter
V notch v, error microphone is inserted into indentation, there, its exterior contour is more than 2cm*2cm, and inner side is compressed using packing ring, just can be with
The fixation of error microphone is completed, above way is repeated, 4 error microphones is all fixed on ceiling corresponding position；Four
Error microphone 5,6,7,8 connected ceiling cablings 15 are consistent with the wire harness cabling on former car roof, from ceiling both sides
Edge cabling, then active noise reduction controller 2 is connected into through rear bulkhead by C posts from the front to the back；
Active noise reduction controller 2 is arranged at automobile trunk, is specifically arranged in below automotive rear partition board, is passed through active noise reduction control
Two limited screw holes at the middle part of device 2 processed, take bolt, the connected mode of nut is allowed to fix with rear bulkhead；Active noise reduction control
Device 2 processed exports four tunnel active noise reduction voice signals, exports first to mixer 3, then by the filtering process of mixer 3 and impedance
After matching regulation, export the front left interface to vehicle power amplifier 4, front right interface, rear left interface, rear right interface and ground wire and connect
Mouthful；Interface of the ground wire is common port；
Mixer 3 and vehicle power amplifier 4 are arranged in automobile center console；The output of active noise reduction controller 2 passes through carpet
Cabling 16 is connected to mixer 3；Specifically, the bundle of outputs of active noise reduction controller 2 leads to carpet at rear bulkhead, with vehicle
Cabling under blanket is consistent, and from the edge on carpet both sides cabling from the front to the back, mixer 3 is linked into after introducing console
In；
As shown in figure 3, signal output front left, front right, rear left, rear right and the ground wire and mixer 3 of onboard audio processing module 13
Signal output front left, front right, rear left, rear right and ground wire be connected in parallel respectively, be then separately input into vehicle power amplifier 4
Front left interface, front right interface, rear left interface, rear right interface and interface of the ground wire；After vehicle power amplifier 4 amplifies each signal
It is respectively outputted to front door left speaker 9, front door right speaker 10, back door left speaker 11 and back door right speaker
12；Vehicle power amplifier 4 connects each loudspeaker by carpet cabling 16；
Specifically operating method is：Disassemble a car first the main frame of music system, find the audio processing modules in host computer system
13 and power amplifier 4, find " FL+, FR+, RL between the output end of audio processing modules 13 and the input of power amplifier 4
+, RR+, GND ", be respectively " front left loudspeaker signal positive pole, front right loudspeaker signal positive pole, rear left loudspeaker signal positive pole, after
Right loudspeaker signal positive pole, common ground line ", signal output after mixer 3 is handled also according to " FL+, FR+, RL+, RR+,
GND " order is linked into corresponding pin.
Above-mentioned Fig. 3 connections, primarily to active noise reduction voice signal can be sent by completing vehicle audio system, and can is just
Music signal is often played, it is necessary to complete correctly to connect between mixer 3 and car audio system, specific audio mixing schematic diagram is such as
Shown in Fig. 3：For automobile when playing music, music signal passes through onboard audio processing module 13 first, then is passed to vehicle-mounted power and puts
Signal after amplification is respectively outputted to four vehicle-mounted loudspeakers 9,10,11,12, put so as to reach by big device 4, power amplifier 4
The purpose of music；Active noise reduction voice signal is before vehicle power amplifier 4 is accessed, it is necessary first to by mixer 3, audio mixing
The main function of device 3 is filtering process and impedance matching, and filtering process is to obtain the good low frequency signal of noise, impedance
The effect matched somebody with somebody is that the energy of signal is adjusted so that the music signal that the active noise reduction voice signal of output plays with former car
Energy is suitable.
So far, connection of the active noise reduction system in automobile has been completed with arrangement, and this connection is passed through with arrangement
Experimental verification, good noise reduction and normal music playing function are achieved, be reality of the active noise reduction techniques on automobile
Now lay the foundation.The present invention farthest reduces the transformation to former car, the connection of active noise reduction system hardware and arrangement letter
It is single, it is convenient to implement, and hardware cost is controlled well, while active noise reduction, also realizing normally music to broadcast
Playing function.
Claims (6)
- A kind of 1. in-car active noise reduction system, it is characterised in that including：Speed probe (1), active noise reduction controller (2), mix Sound device (3), power amplifier (4), error microphone (5,6,7,8), vehicle-mounted loudspeaker (9,10,11,12), onboard audio processing Module (13), automobile CAN interface (14), ceiling cabling (15) and carpet cabling (16)；Speed probe (1) is connected to automobile CAN interface (14), and connects active noise reduction controller by carpet cabling (16) (2), speed probe (1) is sent to active noise reduction sensor (2) after tach signal is collected from automobile CAN interface (14)；Four error microphones (5,6,7,8) are arranged in roof of the vehicle, and connect active noise reduction by ceiling cabling (15) and control Device (2)；Active noise reduction controller (2) is arranged at automobile trunk, and active noise reduction controller (2) exports four tunnel active noise reduction sound Signal, export first to mixer (3), then after mixer (3), export to the front left of vehicle power amplifier (4) and connect Mouth, front right interface, rear left interface, rear right interface and interface of the ground wire, interface of the ground wire are common port；Active noise reduction controller (2) Output is connected to mixer (3) by carpet cabling (16)；Mixer (3) and vehicle power amplifier (4) are arranged in automobile center console；Signal output front left, front right, rear left, rear right and the ground wire of onboard audio processing module (13) and the signal of mixer (3) Output front left, front right, rear left, rear right and ground wire are connected in parallel respectively, before being then separately input into vehicle power amplifier (4) Left interface, front right interface, rear left interface, rear right interface and interface of the ground wire；Vehicle power amplifier (4) divides after each signal is amplified It is not output on the right side of front door left speaker (9), front door right speaker (10), back door left speaker (11) and back door and raises one's voice Device (12).
- 2. in-car active noise reduction system as claimed in claim 1, it is characterised in thatThe connected ceiling cabling (15) of error microphone is consistent with the wire harness cabling on former car roof, from the side on ceiling both sides Cabling, then active noise reduction controller (2) is connected into through rear bulkhead by C posts from the front to the back at edge.
- 3. in-car active noise reduction system as claimed in claim 1, it is characterised in thatThe bundle of outputs of active noise reduction controller (2) leads to carpet at rear bulkhead, is consistent with the cabling under vehicle carpet, From the edge on carpet both sides cabling from the front to the back, it is linked into after being introduced into console in mixer (3).
- 4. in-car active noise reduction system as claimed in claim 1, it is characterised in thatVehicle power amplifier (4) connects each loudspeaker by carpet cabling (16).
- 5. in-car active noise reduction system as claimed in claim 1, it is characterised in thatThe four tunnel active noise reduction voice signals that mixer (3) exports to active noise reduction controller (2) are filtered processing and impedance Matching regulation, the effect of impedance matching is that the energy of signal is adjusted so that active noise reduction voice signal plays with former car Music signal energy it is suitable.
- 6. in-car active noise reduction system as claimed in claim 1, it is characterised in thatFour error microphones (5,6,7,8) are respectively arranged at the left armrests of roof of the vehicle front row, the front-seat right side of roof of the vehicle Arm rest, at roof of the vehicle heel row left armrests and at roof of the vehicle heel row right armrest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710991767.9A CN107644635A (en) | 2017-10-23 | 2017-10-23 | In-car active noise reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710991767.9A CN107644635A (en) | 2017-10-23 | 2017-10-23 | In-car active noise reduction system |
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| Publication Number | Publication Date |
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| CN107644635A true CN107644635A (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710991767.9A Pending CN107644635A (en) | 2017-10-23 | 2017-10-23 | In-car active noise reduction system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108900176A (en) * | 2018-09-20 | 2018-11-27 | 无锡吉兴汽车声学部件科技有限公司 | A kind of adjustable bandpass filter of two channel central frequencies |
| CN110138463A (en) * | 2018-02-02 | 2019-08-16 | 比亚迪股份有限公司 | Method, car-mounted terminal and vehicle for interior communication noise reduction |
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| JP2011126299A (en) * | 2009-12-15 | 2011-06-30 | Honda Motor Co Ltd | Active noise control device |
| JP5002302B2 (en) * | 2007-03-30 | 2012-08-15 | 本田技研工業株式会社 | Active noise control device |
| CN106089361A (en) * | 2016-06-30 | 2016-11-09 | 重庆长安汽车股份有限公司 | A kind of car intrinsic motivation active noise reduction system and method |
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2017
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Patent Citations (3)
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| JP5002302B2 (en) * | 2007-03-30 | 2012-08-15 | 本田技研工業株式会社 | Active noise control device |
| JP2011126299A (en) * | 2009-12-15 | 2011-06-30 | Honda Motor Co Ltd | Active noise control device |
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Non-Patent Citations (1)
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| 邓峰，任冬，刘浩，周启明: "主动降噪技术在改善车内噪声上的应用", 《2013中国汽车工程学会年会》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138463A (en) * | 2018-02-02 | 2019-08-16 | 比亚迪股份有限公司 | Method, car-mounted terminal and vehicle for interior communication noise reduction |
| CN110138463B (en) * | 2018-02-02 | 2021-03-26 | 比亚迪股份有限公司 | Method for in-vehicle communication noise reduction, vehicle-mounted terminal and vehicle |
| CN108900176A (en) * | 2018-09-20 | 2018-11-27 | 无锡吉兴汽车声学部件科技有限公司 | A kind of adjustable bandpass filter of two channel central frequencies |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180130 |
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| RJ01 | Rejection of invention patent application after publication |