CN112863470B - Active noise reduction device and method for large-current noise in electric automobile - Google Patents
Active noise reduction device and method for large-current noise in electric automobile Download PDFInfo
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- CN112863470B CN112863470B CN202110278629.2A CN202110278629A CN112863470B CN 112863470 B CN112863470 B CN 112863470B CN 202110278629 A CN202110278629 A CN 202110278629A CN 112863470 B CN112863470 B CN 112863470B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008030 elimination Effects 0.000 claims abstract description 32
- 238000003379 elimination reaction Methods 0.000 claims abstract description 32
- 239000013013 elastic material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
Abstract
The invention relates to the field of active noise reduction of electric automobiles, in particular to a large-current noise active noise reduction device and a noise reduction method in an electric automobile. The specific technical scheme is as follows: the sleeve comprises a hollow sleeve, wherein a first through hole communicated with the inside and the outside of the sleeve is formed in the hollow sleeve; the first through holes are provided with sound absorbing cavities and are radially arranged around the central axis of the hollow sleeve; an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve. Compared with the prior art, the active noise reduction device and the active noise reduction method for the large-current noise in the electric vehicle have the advantages of high monitoring sensitivity, good noise reduction effect and capability of performing targeted noise reduction on noise sound waves.
Description
Technical Field
The invention relates to the field of active noise reduction of electric automobiles, in particular to a large-current noise active noise reduction device and a noise reduction method in an electric automobile.
Background
Its noise value size is littleer than traditional fuel vehicle when present electric motor car traveles, mainly because cancelled fuel engine, after the noise that does not have fuel engine, wind noise and child noise in the travel have become main noise source, the electric current noise that motor and battery sent through the great electric current that passes through in the during operation wire also has become great noise source simultaneously, and the sound of electric current noise is mostly high frequency noise, can produce the discomfort to driver or passenger, crowd sensitive to high frequency sound will cause serious influence more. The existing noise reduction device is mainly used for passively reducing wind noise and tire noise under the high-speed running working condition, more vibration isolation materials and noise reduction materials are used, and an effective noise reduction effect cannot be formed on the current noise of a motor and a storage battery; meanwhile, the noise generated by the large current noise and the motor is mostly high-frequency noise, and the high-frequency noise can seriously affect the body health of a driver and passengers after being exposed for a long time, and can bring serious traffic safety hidden trouble.
Disclosure of Invention
The invention aims to provide a large-current noise active noise reduction device and a large-current noise active noise reduction method in an electric automobile, so as to solve the problems.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: the large-current noise active noise reduction device in the electric automobile comprises a hollow sleeve, wherein a first through hole communicated with the inside and the outside of the sleeve is formed in the hollow sleeve; the first through holes are provided with sound absorbing cavities and are radially arranged around the central axis of the hollow sleeve; an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve.
Preferably, a hollow annular honeycomb structure layer is arranged on the hollow inner side of the hollow sleeve, and a plurality of mutually closed cavities are formed in the honeycomb structure layer; the honeycomb structure layer is connected with the hollow sleeve through the support frame, and a gap is formed between the hollow sleeve and the honeycomb structure layer.
Preferably, the cavity is vacuum, and the honeycomb structure layer is made of an elastic material, so that the hollow sleeve has elasticity and can be bent along the length direction.
Preferably, a second through hole for communicating the two cavities is arranged between the adjacent cavities; the most inner cavity and the most outer cavity of the honeycomb structure layer are respectively provided with a third through hole and a fourth through hole which are communicated with the inside and the outside.
Preferably, a circular opening is formed in the hollow sleeve, the circular opening is connected with one end of the hollow pipe, and the other end of the hollow pipe is connected with the outside of the electric automobile; the hollow pipes are provided with openable and closable sealed doors.
Preferably, the hollow sleeve is connected with three hollow pipes, and the three hollow pipes are respectively connected with two sides of the middle part of the electric automobile body and the outer parts of the tail part of the electric automobile body; the sealed door is a shutter type opening and closing door.
Preferably, the active noise elimination device is a plurality of active noise elimination horns, and the active noise elimination horns are electrically connected with the first noise sensor.
The active noise reduction method for the large current noise in the electric automobile is characterized by comprising the following steps of:
a. sleeving a main power supply wire of a power battery of an electric automobile in a hollow sleeve with a hole, wherein the main power supply wire at least comprises a power supply wire among a high-voltage controller, a driving battery, a high-voltage controller, a driving motor and a high-voltage controller, and a quick charging plug; the length of the main power supply lead is greater than that of the hollow sleeve, and one or a plurality of hollow sleeves are sleeved on the main power supply lead at intervals;
b. an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve;
c. when the vehicle runs, the first noise sensor starts to measure the internal noise of the vehicle;
d. and the active noise elimination device performs corresponding noise elimination control according to the vibration frequency, the vibration phase and the vibration amplitude of the current noise wave received by the first noise sensor.
Preferably, a second noise sensor is arranged at the head of the seat of the electric automobile, a third noise sensor is arranged near a window of the seat, the second noise sensor receives noise inside the vehicle, the third noise sensor receives noise outside the vehicle, and when the noise outside the vehicle exceeds a certain value or the noise value measured by the third noise sensor is greater than the measured value of the second noise sensor, the active noise eliminator and the first noise sensor reduce the working strength or do not work; otherwise, the active muffler device and the first noise sensor work normally.
Preferably, the active muffler device and the first noise sensor are also arranged above the motor in the step a.
The beneficial technical effects of the invention are as follows: noise generated by the current of the main conductor of the electric automobile is high-frequency noise, the main conductor of the electric automobile is sleeved in the hollow sleeve, and the noise generated by the current in the main conductor enters the sound absorption cavity through the first through hole, so that the noise can be effectively weakened; meanwhile, the absorbed and weakened noise is transmitted out through the first through hole, and after the first noise sensor receives a noise signal, the active noise elimination device performs corresponding noise elimination control according to the vibration frequency, the vibration phase and the vibration amplitude of the received current noise wave, so that the noise is further accurately eliminated.
Therefore, compared with the prior art, the active noise reduction device and the active noise reduction method for the large-current noise in the electric vehicle have the advantages of high monitoring sensitivity, good noise reduction effect and capability of performing targeted noise reduction on noise sound waves.
Drawings
FIG. 1 is a sectional view of a hollow sleeve according to an embodiment of the present invention;
FIG. 2 is a schematic view of a hollow sleeve and a hollow tube according to an embodiment of the present invention;
FIG. 3 is a diagram of a conventional electric vehicle chassis and related components;
fig. 4 is a physical diagram of the high voltage controller-quick charging plug, the high voltage controller-driving motor and the high voltage controller-battery power supply line in an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.
Referring to fig. 1-2, fig. 2 is a schematic view showing the positions of the hollow sleeve and the hollow tube, with the vehicle housing and seat hidden, and showing only the structure of the vehicle chassis 4, the motor 14 and the battery pack 15; in the hollow sleeve 1 of the embodiment, a first through hole 2 communicating the inside and the outside of the sleeve is arranged in the hollow sleeve 1; the first through holes 2 are provided with sound absorbing cavities 3, and the first through holes 2 are radially arranged around the central axis of the hollow sleeve 1; an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve 1. The main guide wire is sleeved in the hollow sleeve 1, the hollow sleeve 1 can effectively weaken noise generated by the main guide wire, and the sound absorption cavity 3 can effectively absorb the noise after the noise enters the sound absorption cavity 3 through the first through hole 2; meanwhile, a first noise sensor arranged outside the hollow sleeve 1 measures noise, and the active noise elimination device emits corresponding sound waves according to the vibration frequency, the vibration phase and the vibration amplitude of the received current noise waves to perform noise elimination control.
A hollow annular honeycomb structure layer 5 is arranged on the hollow inner side of the hollow sleeve 1, and a plurality of mutually closed cavities 6 are formed in the honeycomb structure layer 5; the honeycomb structure layer 5 is connected with the hollow sleeve 1 through a support frame 11, and a gap 10 is arranged between the hollow sleeve 1 and the honeycomb structure layer 5. The honeycomb structure layer 5 and the plurality of cavities 6 therein can effectively obstruct the vibration generated by noise, and the stability of the honeycomb structure layer 5 can effectively prevent the honeycomb structure layer from being influenced by the noise and the main conducting wire to generate resonance. Furthermore, the cavity 6 can be designed to be vacuum, and the honeycomb structure layer 5 is made of elastic material, so that the hollow sleeve 1 has elasticity and can be bent along the length direction; the closed vacuum cavity 6 can further reduce the noise transmission path, and simultaneously has a honeycomb structure layer 5 made of a certain elastic material, so that the absorption of noise vibration is enhanced.
A second through hole 7 for communicating the two cavities 6 is arranged between the adjacent cavities 6; the innermost cavity 6 and the outermost cavity 6 of the honeycomb structure layer 5 are respectively provided with a third through hole 8 and a fourth through hole 9 which are communicated with the inside and the outside. The second through-hole 7 that sets up between adjacent cavity 6 makes 5 every cavity 6 of honeycomb structural layer all form inside great, and the less complicated porous structure of access & exit can effectually absorb the noise. The apertures of the third through hole 8, the second through hole 7, the fourth through hole 9 and the first through hole 2 are sequentially reduced, and the noise absorption effect in the cavity 6 and the sound absorption cavity 3 is effectively improved by changing the aperture size.
A round opening is formed in the hollow sleeve 1, the round opening is connected with one end of a hollow pipe 12, and the other end of the hollow pipe 12 is connected with the outside of the electric automobile; the hollow tubes 12 are each provided with an openable and closable containment door 13. The main guide wire is easy to generate higher heat while transmitting high current, a circular opening is arranged on the hollow sleeve 1, and external air is introduced into a gap 10 of the hollow sleeve 1 through a hollow pipe 12 connected with the outside of the electric automobile, so that the temperature of the main guide wire is effectively reduced, and the dangerous condition possibly generated due to overhigh temperature is prevented; the sealed door 13 that can switch can open when needing the cooling and carry out aeration cooling, closes when not needing the cooling and prevents that outside pollutant from getting into.
The hollow sleeve 1 is connected with three hollow pipes 12, and the three hollow pipes 12 are respectively connected with the two sides of the middle part of the electric automobile body and the outer part of the tail part of the electric automobile body; the sealed door 13 is a shutter type opening and closing door. When the vehicle runs at high speed, negative pressure is generated between the external ring of the vehicle and the environment in the hollow pipe 12, the hollow pipes 12 on the two sides of the middle part of the vehicle body discharge air, and the hollow pipe 12 at the tail part of the vehicle sucks external air for circulation.
The active noise elimination device is a plurality of active noise elimination horns 4, and the active noise elimination horns 4 are electrically connected with the first noise sensor. The plurality of active muffling horns 4 generate sound waves corresponding to the sound waves received by the first noise sensor to muffle the noise.
The active noise reduction method for the large-current noise in the electric automobile is characterized by comprising the following steps of:
a. sleeving a main power supply wire of a power battery of an electric automobile in a hollow sleeve 1 with a hole, wherein the main power supply wire at least comprises a power supply wire among a high-voltage controller, a driving battery, a high-voltage controller, a driving motor and a high-voltage controller, and a quick charging plug; the length of the main power supply lead is greater than that of the hollow sleeve 1, and one or a plurality of hollow sleeves 1 are sleeved on the main power supply lead at intervals;
b. an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve 1;
c. when the vehicle runs, the first noise sensor starts to measure the internal noise of the vehicle;
d. and the active noise elimination device performs corresponding noise elimination control according to the vibration frequency, the vibration phase and the vibration amplitude of the current noise wave received by the first noise sensor.
The head of the seat of the electric automobile is provided with a second noise sensor, a third noise sensor is arranged near a window of the seat, the second noise sensor receives noise inside the vehicle, the third noise sensor receives noise outside the vehicle, and when the noise outside the vehicle exceeds a certain value or the noise value measured by the third noise sensor is greater than the measured value of the second noise sensor, the active noise eliminator and the first noise sensor reduce the working strength or do not work; otherwise, the active muffler device and the first noise sensor work normally. In step a, an active muffler device and a first noise sensor are also arranged above the motor. The second noise sensor receives noise inside the vehicle and outside, wherein wind noise and tire noise in the outside are main noises, the wind noise and the tire noise are mainly low-frequency noises, and large-current noise of the motor and the main conducting wire is mainly high-frequency noise; when the low-frequency noise received by the second noise sensor exceeds 70dB, the active noise elimination device and the first noise sensor enter a standby state; when the low-frequency noise received by the second noise sensor is lower than 70dB, the active noise elimination device and the first noise sensor work, and the active noise elimination device sends out corresponding sound waves according to the vibration frequency, the vibration phase and the vibration amplitude of the current noise waves received by the first noise sensor to carry out corresponding noise elimination control.
Claims (9)
1. Device of making an uproar falls in electric automobile medium and large current noise initiative, its characterized in that: the sleeve comprises a hollow sleeve (1), wherein a first through hole (2) communicated with the inside and the outside of the sleeve is formed in the hollow sleeve (1); the first through holes (2) are provided with sound absorbing cavities (3), and the first through holes (2) are radially arranged around the central axis of the hollow sleeve (1); an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve (1); a first through hole (2) communicated with the inside and the outside of the hollow sleeve is arranged in the hollow sleeve (1); the first through holes (2) are provided with sound absorbing cavities (3), and the first through holes (2) are radially arranged around the central axis of the hollow sleeve (1); an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve (1);
a hollow annular honeycomb structure layer (5) is arranged on the hollow inner side of the hollow sleeve (1), and a plurality of mutually closed cavities (6) are formed in the honeycomb structure layer (5); the honeycomb structure layer (5) is connected with the hollow sleeve (1) through the support frame (11), and a gap (10) is reserved between the hollow sleeve (1) and the honeycomb structure layer (5).
2. The active noise reduction device for medium-current noise of the electric automobile according to claim 1, wherein: the cavity (6) is vacuum, and the honeycomb structure layer (5) is made of elastic materials, so that the hollow sleeve (1) has elasticity and can be bent along the length direction.
3. The active noise reduction device for medium-current noise of the electric automobile according to claim 2, wherein: a second through hole (7) for communicating the two cavities (6) is arranged between the adjacent cavities (6); the most inner cavity (6) and the most outer cavity (6) of the honeycomb structure layer (5) are respectively provided with a third through hole (8) and a fourth through hole (9) which are communicated with the inside and the outside.
4. The active noise reduction device for medium-current noise of the electric automobile according to claim 2, wherein: a round opening is formed in the hollow sleeve (1), the round opening is connected with one end of a hollow pipe (12), and the other end of the hollow pipe (12) is connected with the outside of the electric automobile; the hollow pipes (12) are provided with openable and closable sealed doors (13).
5. The active noise reduction device for medium-current noise of electric vehicles according to claim 4, wherein: the hollow sleeve (1) is connected with three hollow pipes (12), and the three hollow pipes (12) are respectively connected with the two sides of the middle part of the electric automobile body and the outer parts of the tail part of the electric automobile body; the closed door (13) is a shutter type opening and closing door.
6. The active noise reduction device for medium and high current noise of the electric vehicle according to any one of claims 1 to 5, wherein: the active noise elimination device is composed of a plurality of active noise elimination horns (4), and the active noise elimination horns (4) are electrically connected with the first noise sensor.
7. The active noise reduction method for the medium-high current noise of the electric automobile is based on the active noise reduction device for the medium-high current noise of the electric automobile in claim 1, and is characterized by comprising the following steps of:
a. sleeving a main power supply wire of a power battery of an electric automobile in a hollow sleeve (1) with a hole, wherein the main power supply wire at least comprises a power supply wire among a high-voltage controller, a driving battery, a high-voltage controller, a driving motor and a high-voltage controller, and a quick charging plug; the length of the main power supply lead is greater than that of the hollow sleeves (1), and one or a plurality of hollow sleeves (1) are sleeved on the main power supply lead at intervals;
b. an active noise elimination device and a first noise sensor are arranged outside the hollow sleeve (1);
c. when the vehicle runs, the first noise sensor starts to measure the internal noise of the vehicle;
d. and the active noise elimination device performs corresponding noise elimination control according to the vibration frequency, the vibration phase and the vibration amplitude of the current noise wave received by the first noise sensor.
8. The active noise reduction method for the medium and high current noise of the electric automobile according to claim 7, characterized in that: the head of the seat of the electric automobile is provided with a second noise sensor, a third noise sensor is arranged near a vehicle window, the second noise sensor receives noise inside the vehicle, the third noise sensor receives noise outside the vehicle, and when the noise outside the vehicle exceeds a certain value or a noise value measured by the third noise sensor is larger than a measurement value of the second noise sensor, the active noise elimination device and the first noise sensor reduce the working strength or do not work; otherwise, the active muffler device and the first noise sensor work normally.
9. The active noise reduction method for high current noise in the electric automobile according to claim 8, characterized in that: in step a, an active muffler device and a first noise sensor are also arranged above the motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110278629.2A CN112863470B (en) | 2021-03-16 | 2021-03-16 | Active noise reduction device and method for large-current noise in electric automobile |
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| CN202110278629.2A CN112863470B (en) | 2021-03-16 | 2021-03-16 | Active noise reduction device and method for large-current noise in electric automobile |
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| CN112863470B true CN112863470B (en) | 2023-04-18 |
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| KR102502845B1 (en) * | 2022-03-04 | 2023-02-24 | 주식회사 대솔오시스 | Sound absorption board for electric vehicles |
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