CN114703722B - Noise reduction system and noise reduction method of double-steel-wheel vibratory roller and vibratory roller - Google Patents
Noise reduction system and noise reduction method of double-steel-wheel vibratory roller and vibratory roller Download PDFInfo
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- CN114703722B CN114703722B CN202210246256.5A CN202210246256A CN114703722B CN 114703722 B CN114703722 B CN 114703722B CN 202210246256 A CN202210246256 A CN 202210246256A CN 114703722 B CN114703722 B CN 114703722B
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- 230000009467 reduction Effects 0.000 title claims abstract description 27
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 230000003993 interaction Effects 0.000 claims abstract description 28
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- 230000009977 dual effect Effects 0.000 claims description 11
- 230000002401 inhibitory effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
- E01C19/282—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows self-propelled, e.g. with an own traction-unit
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
- E01C19/285—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows with attachments for work other than rolling, e.g. dozer blades, shoes for conversion into plate vibrator; fitted to vehicles, road-construction or earth-moving machinery ; vibrated or the like auxiliary rolls, e.g. for rolling road edges; provided with means for facilitating transport
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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
- G10K11/17821—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 characterised by the analysis of the input signals only
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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
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17857—Geometric disposition, e.g. placement of microphones
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
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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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3027—Feedforward
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a noise reduction system of a double-steel-wheel vibratory roller, which comprises a vehicle-mounted main controller, an acoustic unit for outputting sound waves, a feedback front end for collecting vibration noise level and phase and a man-machine interaction display, wherein the vehicle-mounted main controller is used for controlling the vehicle-mounted main controller to output sound waves; the data interaction end of the vehicle-mounted main controller is connected with the man-machine interaction display; the vehicle-mounted main controller is connected with a plurality of frequency sensors for measuring the vibration frequency of the road roller steel wheel; through setting up the real-time noise in the acquisition driver's cabin of feedback front end, on-vehicle main control unit transmits the real-time steel wheel vibration frequency that reads to acoustic controller in, and noise level and the phase place that the feedback front end gathered also transmit to acoustic controller simultaneously in, acoustic controller overlaps the final result of handling and exports to the acoustic unit in, and acoustic unit can send the sound wave that restraines the noise in the driver's cabin, has solved current double steel wheel vibratory roller and has leaded to the too big problem of noise in the driver's cabin because beat frequency phenomenon.
Description
Technical Field
The invention relates to a noise reduction system and a noise reduction method of a double-steel-wheel vibratory roller and the vibratory roller, and belongs to the technical field of driving assistance of the vibratory roller.
Background
The development of modern scientific technology greatly promotes the intellectualization of the road roller, and more high-end technologies are introduced into the field of the road roller, so that the road roller continuously advances towards a more efficient and safer target. Normally, the construction environment of the road roller contains a lot of noise, at present, a host factory reduces noise in a cab through a physical noise reduction mode, and the physical noise reduction is often realized by arranging a sound insulation material in the vehicle to isolate the noise, so that the manufacturing cost of the vehicle can be increased, the noise isolation effect is not ideal, the input and output are relatively low, and the long-term construction noise brings great physiological injury to a driver.
Besides the noise generated by the engine, the vibration roller has larger noise energy generated by the vibration wheel, and the vibration frequency of the vibration roller is a low frequency band and is close to the resonance frequency of a human body, so that an operator can feel double tests on the body and ears in the construction process, the operator can easily feel tired, the construction efficiency is reduced, and the construction risk is increased. And some prompt sounds exist in the environment and are mixed in noise to be covered to a great extent, so that the prompt effect on personnel is reduced.
Moreover, the dual steel wheel vibratory roller is different from a common single steel wheel vibratory roller, and the front steel wheel and the rear steel wheel of the dual steel wheel vibratory roller are respectively used as noise sources to apply noise into a cab through different paths, wherein the dual steel wheel vibratory roller has a beat frequency phenomenon, namely the vibration noise of the front steel wheel and the rear steel wheel are periodically overlapped together, so that the noise level is very high, and the human body is greatly injured.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a noise reduction system and a noise reduction method of a double-steel-wheel vibratory roller and the vibratory roller, and solves the problem that the noise in a cab is overlarge due to beat frequency of the traditional double-steel-wheel vibratory roller.
In order to achieve the above purpose/solve the above technical problems, the present invention is realized by adopting the following technical scheme:
the noise reduction system of the double-steel-wheel vibratory roller comprises a vehicle-mounted main controller, an acoustic unit for outputting sound waves, a feedback front end for collecting vibration noise level and phase and a man-machine interaction display;
the data interaction end of the vehicle-mounted main controller is connected with the acoustic controller, the data interaction end of the vehicle-mounted main controller is connected with the man-machine interaction display, and the man-machine interaction display can input control instructions to the vehicle-mounted main controller and display output content of the vehicle-mounted main controller; the vehicle-mounted main controller comprises a processor and a storage medium, wherein the storage medium is used for storing a current value corresponding to the vibration frequency of the steel wheel;
the output end of the acoustic controller is connected with the acoustic unit; the output end of the feedback front end is connected with the acoustic controller;
the vehicle-mounted main controller is connected with a plurality of frequency sensors for measuring the vibration frequency of the road roller steel wheel.
Optionally, the acoustic unit is two voice coil horns, the acoustic unit is controlled by two paths of crossing signals of the acoustic controller, and the acoustic cavity is used for providing compressed air space for the horns, and simultaneously preventing sound waves generated by the front and the rear of the horns from canceling each other.
Optionally, the acoustic unit is connected with an acoustic cavity, and the cavity of the acoustic cavity is a closed cavity or an open cavity.
Optionally, on-vehicle main control unit is connected with a plurality of vibration proportion pumps that are used for adjusting vibration road roller steel wheel frequency difference, and vibration proportion pump receives on-vehicle main control unit's control, and on-vehicle main control unit has obtained the vibration frequency of two steel wheels in real time to adjust the vibration frequency difference of two steel wheels through adjusting the discharge capacity of different vibration proportion pumps, weaken the beat frequency phenomenon.
Optionally, the man-machine interaction display is provided with a key for actively reducing noise of a switch and a key for automatically calibrating the vibration frequency of the steel wheel of the vibratory roller.
In a second aspect, a noise reduction method for a dual steel wheel vibratory roller, using the noise reduction system for a dual steel wheel vibratory roller, includes the following steps:
A. pressing a key for automatically calibrating the vibration frequency of the steel wheel of the vibratory roller, and adjusting the vibration frequency difference of the two steel wheels;
B. after a key for starting active noise reduction is pressed on the man-machine interaction display, the step E is skipped if the current double-wheel vibration is judged, and if the current double-wheel vibration is single-wheel vibration, the step E is sequentially executed;
C. the vehicle-mounted main controller reads the vibration frequency of the corresponding steel wheel and transmits the real-time vibration frequency to the acoustic controller, the acoustic controller sends a default sound pressure waveform corresponding to the frequency to the acoustic unit, and the acoustic unit sends out sound waves for inhibiting vibration noise through the voice coil;
D. the feedback front end collects vibration noise level and phase in real time, collected data are transmitted to the acoustic controller, the acoustic controller overlaps the current output sound pressure waveform, the sound pressure waveform is updated, and the step C is repeated until the comprehensive sound pressure level is reduced to a reasonable range;
E. the vehicle-mounted main controller reads the vibration frequencies of two steel wheels in real time, wherein the vibration frequencies are f respectively 1 And f 2 The method comprises the steps that frequencies are sent to an acoustic controller in real time, the acoustic controller calculates default waveforms corresponding to the frequencies respectively, and the final results are overlapped and output to an acoustic unit, and the acoustic unit sends out sound waves for suppressing noise through a voice coil;
F. the feedback front end collects vibration noise level and phase in real time and transmits collected data to the acoustic controller, and the acoustic controller obtains actual phase difference of two steel wheel vibration noise and respective center frequency f through Fourier change 1 ' and f 2 ' judging the current f through the phase difference 1 ' faster than f 2 Time t of' reading the conversion factor k in the storage medium to obtain the vibration frequency adjustment time t 2 =t×k, the acoustic controller will t 2 Is sent to the vehicle-mounted main controller, and the vehicle-mounted main controller increases f 2 ' corresponding to the vibration frequency of the steel wheel and maintaining t 2 After a time, the current value is restored to the original frequency current value, and the step D is repeated until the phase difference is smaller than the target value t 0 。
In a third aspect, a vibratory roller includes the dual steel wheel vibratory roller noise reduction system described above.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the noise level and the phase are acquired in real time by setting the feedback front end, so that the noise level and the phase are obtained, the vehicle-mounted main controller transmits the read real-time steel wheel vibration frequency to the acoustic controller, meanwhile, the noise level and the phase acquired by the feedback front end are also transmitted to the acoustic controller, the acoustic controller superimposes and outputs the processed final result to the acoustic unit, the acoustic unit can emit sound waves for inhibiting the noise in the cab, the huge noise produced by the double steel wheels through the beat frequency phenomenon is effectively reduced, and the problem that the noise in the cab is overlarge due to the beat frequency phenomenon of the current double steel wheel vibratory roller is solved.
Drawings
FIG. 1 is a schematic diagram of a noise reduction system for a dual steel wheel vibratory roller according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a vibratory roller according to an embodiment of the invention.
In the figure: 1. a vehicle-mounted main controller; 2. an acoustic controller; 3. an acoustic unit; 4. a feedback front end; 5. a human-computer interaction display; 6. a frequency sensor; 7. a vibration ratio pump; 8. an acoustic cavity.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention, unless otherwise indicated, in the description of the present invention, "a plurality" means two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Example 1
A noise reduction system of a double-steel-wheel vibratory roller comprises a vehicle-mounted main controller 1, an acoustic controller 2, an acoustic unit 3, a feedback front end 4 and a man-machine interaction display 5;
the vehicle-mounted main controller 1 comprises a processor and a storage medium, wherein the storage medium is used for storing a current value corresponding to the vibration frequency of the steel wheel, a data interaction end of the vehicle-mounted main controller 1 is respectively connected with the acoustic controller 2 and the man-machine interaction display 5 through a bus, the man-machine interaction display 5 is arranged in a cab of the vibratory roller, people can input control instructions to the vehicle-mounted main controller 1 through the man-machine interaction display 5, and the man-machine interaction display 5 can display output content of the vehicle-mounted main controller 1;
the vehicle-mounted main controller 1 is connected with two frequency sensors 6, the accuracy of the frequency reading of the two frequency sensors 6 is not lower than 0.1Hz, the two frequency sensors 6 are respectively arranged on two steel wheels of the vibratory roller and fixedly connected with a vibration motor connecting disc of the steel wheels, the frequency sensors 6 are used for measuring the vibration frequencies of the two steel wheels of the vibratory roller, the frequency sensors 6 in the embodiment are passive magnetic induction sensors, parameters are obtained through cutting magnetic induction lines, the accuracy of the frequency reading can be not lower than 0.1Hz, and the vehicle-mounted main controller 1 can read the vibration frequencies of the two steel wheels in real time through the frequency sensors 6;
the feedback front end 4 is arranged in a cab of the vibratory roller, the output end of the feedback front end 4 is connected with the acoustic controller 2, and the feedback front end 4 acquires the vibration noise level and the phase in the cab in real time and transmits acquired data to the acoustic controller 2; the output end of the acoustic controller 2 is connected with the acoustic unit 3, the acoustic unit 3 is arranged in a cab of the vibratory roller, the acoustic unit 3 is a double-voice coil loudspeaker, the acoustic unit 3 is provided with an acoustic cavity 8, the cavity of the acoustic cavity 8 is a closed cavity or an open cavity, the acoustic cavity 8 is used for providing a space for compressed air for the loudspeaker, and meanwhile, sound waves generated by the front and rear sides of the loudspeaker are prevented from being mutually counteracted; the acoustic unit 3 is controlled by two paths of crossing signals of the acoustic controller 2, and the acoustic controller 2 receives information from the vehicle-mounted main controller 1 and controls the acoustic unit 3 to emit sound waves for suppressing noise in a cab;
the man-machine interaction display 5 is provided with a key for actively reducing noise by a switch and a key for automatically calibrating the vibration frequency of the steel wheel of the vibratory roller, and people start noise reduction and adjust the vibration frequency difference of the two steel wheels by pressing the two keys;
the PWM output end of the vehicle-mounted main controller 1 is connected with two vibration proportion pumps 7, a proportion electromagnetic valve of the vibration proportion pumps 7 is controlled by the vehicle-mounted main controller 1, the two vibration proportion pumps 7 are respectively arranged on two steel wheels of the vibratory roller, a target frequency value is set on the human-computer interaction display 5 by people, after a key for automatically calibrating the vibration frequency of the steel wheel of the vibratory roller is pressed, the rotation speed of an engine is automatically increased to a rated rotation speed, meanwhile, the vehicle-mounted main controller 1 reads the set target frequency value through a CAN bus and reads a corresponding default current value from a storage medium, the vehicle-mounted main controller 1 converts the read current value into a PWM duty ratio to control the displacement of one of the vibration proportion pumps 7, the vehicle-mounted main controller 1 acquires the vibration frequency of the steel wheel in real time through a frequency sensor 6, the vibration frequency of the steel wheel corresponding to the vibration proportion pump 7 is controlled within +/-0.5 Hz of the target frequency value through closed-loop adjustment, and the current value corresponding to the vibration frequency at the moment is stored in the storage medium of the vehicle-mounted main controller 1 to be recorded as the current frequency; the vehicle-mounted main controller 1 converts a current value corresponding to the current frequency into PWM duty ratio to control the displacement of the other vibration proportion pump 7, the vehicle-mounted main controller 1 acquires the vibration frequency of the other steel wheel in real time through the other frequency sensor 6, the vibration frequency of the steel wheel is controlled within +/-0.5 Hz of the current frequency through closed-loop adjustment, the current value corresponding to the vibration frequency at the moment is stored in a storage medium of the vehicle-mounted main controller 1, finally, the vehicle-mounted main controller 1 finishes current output, the engine speed is restored to idle speed, the human-computer interaction display 5 prompts calibration to be completed, the two frequencies are enabled to be closer through controlling the vibration frequencies of the two steel wheels, and beat frequency phenomenon can be weakened.
Example two
A noise reduction method of a double-steel-wheel vibratory roller comprises the following steps:
A. pressing a key for automatically calibrating the vibration frequency of the steel wheel of the vibratory roller, and adjusting the vibration frequency difference of the two steel wheels;
B. because the double-steel-wheel vibratory roller has two working states of double-steel-wheel vibration and single-steel-wheel vibration, and the two working states are started by an operator in a cab through a key board, after a key for starting active noise reduction is pressed on the man-machine interaction display 5, the vehicle-mounted main controller 1 judges that the double-wheel vibration is present, the step E is skipped, and if the double-wheel vibration is the single-wheel vibration, the step E is sequentially executed;
C. the vehicle-mounted main controller 1 reads the vibration frequency of the corresponding steel wheel and transmits the real-time vibration frequency to the acoustic controller 2, the acoustic controller 2 sends a default sound pressure waveform corresponding to the frequency to the acoustic unit 3, and the acoustic unit 3 sends out sound waves for inhibiting vibration noise through the voice coil;
D. the feedback front end 4 collects vibration noise level and phase in real time, the collected data are transmitted to the acoustic controller 2, the acoustic controller 2 superimposes the vibration noise level and the current output sound pressure waveform, the sound pressure waveform is updated, and the step C is repeated until the comprehensive sound pressure level is reduced to be within a reasonable range;
E. the vehicle-mounted main controller reads the vibration frequencies of two steel wheels in real time, wherein the vibration frequencies are f respectively 1 And f 2 The method comprises the steps that frequencies are sent to an acoustic controller in real time, the acoustic controller calculates default waveforms corresponding to the frequencies respectively, and the final results are overlapped and output to an acoustic unit, and the acoustic unit sends out sound waves for suppressing noise through a voice coil;
F. the feedback front-end 4 collects the vibration noise level and phase in real time,and transmit the acquired data to the acoustic controller 2, the acoustic controller 2 obtains the actual phase difference of the two steel wheel vibration noises and the respective center frequency f through Fourier change 1 ' and f 2 ' judging the current f through the phase difference 1 ' faster than f 2 Time t of' reading the conversion factor k in the storage medium to obtain the vibration frequency adjustment time t 2 =t×k, the acoustic controller 2 will t 2 Is sent to the vehicle-mounted main controller 1, and the vehicle-mounted main controller 1 increases f 2 ' corresponding to the vibration frequency of the steel wheel and maintaining t 2 After the time, the current is restored to the original frequency current value corresponding to the frequency when the vehicle vibrates before the step A is not performed, and the step D is repeated until the phase difference is smaller than the target value t 0 Target value t 0 For the final control target value of the system, namely, 100% synchronization of vibration phases of front wheels and rear wheels is impossible, t 0 For the minimum value that can be achieved by the system, the value is not a fixed specific value that is affected by the system.
Example III
The vibratory roller comprises the noise reduction system of the double-steel-wheel vibratory roller.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (4)
1. The noise reduction system of the double-steel-wheel vibratory roller is characterized by comprising a vehicle-mounted main controller, an acoustic unit for outputting sound waves, a feedback front end for collecting vibration noise level and phase and a man-machine interaction display;
the data interaction end of the vehicle-mounted main controller is connected with the acoustic controller, the data interaction end of the vehicle-mounted main controller is connected with the man-machine interaction display, and the man-machine interaction display can input control instructions to the vehicle-mounted main controller and display output content of the vehicle-mounted main controller; the vehicle-mounted main controller comprises a processor and a storage medium, wherein the storage medium is used for storing a current value corresponding to the vibration frequency of the steel wheel;
the output end of the acoustic controller is connected with the acoustic unit; the output end of the feedback front end is connected with the acoustic controller;
the vehicle-mounted main controller is connected with a plurality of frequency sensors for measuring the vibration frequency of the road roller steel wheel;
the vehicle-mounted main controller is connected with a plurality of vibration proportion pumps for adjusting the frequency difference of the steel wheels of the vibratory roller;
the man-machine interaction display is provided with a key for actively reducing noise of a switch and a key for automatically calibrating the vibration frequency of the steel wheel of the vibratory roller;
A. pressing a key for automatically calibrating the vibration frequency of the steel wheel of the vibratory roller, and adjusting the vibration frequency difference of the two steel wheels;
B. after a key for starting active noise reduction is pressed on the man-machine interaction display, the step E is skipped if the current double-wheel vibration is judged, and if the current double-wheel vibration is single-wheel vibration, the step E is sequentially executed;
C. the vehicle-mounted main controller reads the vibration frequency of the corresponding steel wheel and transmits the real-time vibration frequency to the acoustic controller, the acoustic controller sends a default sound pressure waveform corresponding to the frequency to the acoustic unit, and the acoustic unit sends out sound waves for inhibiting vibration noise through the voice coil;
D. the feedback front end collects vibration noise level and phase in real time, collected data are transmitted to the acoustic controller, the acoustic controller overlaps the current output sound pressure waveform, the sound pressure waveform is updated, and the step C is repeated until the comprehensive sound pressure level is reduced to a reasonable range;
E. the vehicle-mounted main controller reads the vibration frequencies of two steel wheels in real time, wherein the vibration frequencies are f respectively 1 And f 2 The method comprises the steps that frequencies are sent to an acoustic controller in real time, the acoustic controller calculates default waveforms corresponding to the frequencies respectively, and the final results are overlapped and output to an acoustic unit, and the acoustic unit sends out sound waves for suppressing noise through a voice coil;
F. the feedback front end collects vibration noise level and phase in real time and collects the vibration noise level and the phaseThe data are transmitted to an acoustic controller, and the acoustic controller obtains the actual phase difference of the vibration noise of the two steel wheels and the respective center frequency f through Fourier change 1 ' and f 2 ' judging the current f through the phase difference 1 ' faster than f 2 Time t of' reading the conversion factor k in the storage medium to obtain the vibration frequency adjustment time t 2 =t×k, the acoustic controller will t 2 Is sent to the vehicle-mounted main controller, and the vehicle-mounted main controller increases f 2 ' corresponding to the vibration frequency of the steel wheel and maintaining t 2 After a time, the current value is restored to the original frequency current value, and the step D is repeated until the phase difference is smaller than the target value t 0 。
2. The dual steel wheel vibratory roller noise reduction system of claim 1, wherein the acoustic unit is a dual voice coil horn and is controlled by two-way crossover signals of the acoustic controller.
3. The noise reduction system of a dual steel wheel vibratory roller of claim 1, wherein the acoustic unit is connected with an acoustic cavity, and the cavity of the acoustic cavity is a closed cavity or an open cavity.
4. A vibratory roller comprising a dual steel wheel vibratory roller noise reduction system as claimed in any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246256.5A CN114703722B (en) | 2022-03-14 | 2022-03-14 | Noise reduction system and noise reduction method of double-steel-wheel vibratory roller and vibratory roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246256.5A CN114703722B (en) | 2022-03-14 | 2022-03-14 | Noise reduction system and noise reduction method of double-steel-wheel vibratory roller and vibratory roller |
Publications (2)
| Publication Number | Publication Date |
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| CN114703722A CN114703722A (en) | 2022-07-05 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05280586A (en) * | 1992-04-03 | 1993-10-26 | Honda Motor Co Ltd | Vibration noise control device for vehicles |
| CN101576738A (en) * | 2009-06-15 | 2009-11-11 | 长安大学 | Power matching control system for novel energy-saving double-drum vibratory roller |
| CN202809452U (en) * | 2012-10-15 | 2013-03-20 | 长安大学 | System for intelligently matching vibration parameters of double-drum vibratory roller |
| CN103511553A (en) * | 2013-10-09 | 2014-01-15 | 中联重科股份有限公司 | Beat vibration noise control device, method and system and engineering machinery |
| CN103541295A (en) * | 2013-11-07 | 2014-01-29 | 中联重科股份有限公司 | Double-wheel road roller vibration hydraulic system, control method and road roller |
| CN205292510U (en) * | 2016-01-25 | 2016-06-08 | 北谷电子有限公司 | Engineering machine tool driver's cabin with active noise reduction |
| CN112482140A (en) * | 2020-12-09 | 2021-03-12 | 徐工集团工程机械股份有限公司道路机械分公司 | Control method and system for eliminating beat vibration phenomenon of double-steel-wheel road roller |
| CN214175677U (en) * | 2020-12-09 | 2021-09-10 | 徐工集团工程机械股份有限公司道路机械分公司 | Vibratory roller and active noise reduction system thereof |
-
2022
- 2022-03-14 CN CN202210246256.5A patent/CN114703722B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05280586A (en) * | 1992-04-03 | 1993-10-26 | Honda Motor Co Ltd | Vibration noise control device for vehicles |
| CN101576738A (en) * | 2009-06-15 | 2009-11-11 | 长安大学 | Power matching control system for novel energy-saving double-drum vibratory roller |
| CN202809452U (en) * | 2012-10-15 | 2013-03-20 | 长安大学 | System for intelligently matching vibration parameters of double-drum vibratory roller |
| CN103511553A (en) * | 2013-10-09 | 2014-01-15 | 中联重科股份有限公司 | Beat vibration noise control device, method and system and engineering machinery |
| CN103541295A (en) * | 2013-11-07 | 2014-01-29 | 中联重科股份有限公司 | Double-wheel road roller vibration hydraulic system, control method and road roller |
| CN205292510U (en) * | 2016-01-25 | 2016-06-08 | 北谷电子有限公司 | Engineering machine tool driver's cabin with active noise reduction |
| CN112482140A (en) * | 2020-12-09 | 2021-03-12 | 徐工集团工程机械股份有限公司道路机械分公司 | Control method and system for eliminating beat vibration phenomenon of double-steel-wheel road roller |
| CN214175677U (en) * | 2020-12-09 | 2021-09-10 | 徐工集团工程机械股份有限公司道路机械分公司 | Vibratory roller and active noise reduction system thereof |
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