CN114703722A - Noise reduction system and method for double-steel-wheel vibratory roller and vibratory roller - Google Patents
Noise reduction system and method for double-steel-wheel vibratory roller and vibratory roller Download PDFInfo
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- CN114703722A CN114703722A CN202210246256.5A CN202210246256A CN114703722A CN 114703722 A CN114703722 A CN 114703722A CN 202210246256 A CN202210246256 A CN 202210246256A CN 114703722 A CN114703722 A CN 114703722A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
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- 238000003860 storage Methods 0.000 claims description 12
- 230000002401 inhibitory effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 2
- 230000035559 beat frequency Effects 0.000 abstract description 7
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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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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Road Paving Machines (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (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 acquiring the grade and phase of vibratory noise and a human-computer interaction display, wherein 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 human-computer interaction display; the vehicle-mounted main controller is connected with a plurality of frequency sensors for measuring the vibration frequency of the steel wheels of the road roller; through setting up the noise in the real-time collection driver's cabin of feedback front end, on-vehicle main control unit transmits the real-time steel wheel vibration frequency who reads to the acoustic controller in, the noise level and the phase place that the feedback front end was gathered simultaneously also transmit to the acoustic controller in, the acoustic controller overlaps the final result of handling and exports to the acoustic unit in, the acoustic unit can send the sound wave that suppresses the interior noise of driver's cabin, the problem of current double steel wheel vibrated roller because beat frequency phenomenon leads to the too big noise in the driver's cabin has been solved.
Description
Technical Field
The invention relates to a noise reduction system and method for a double-steel-wheel vibratory roller and the vibratory roller, and belongs to the technical field of auxiliary driving of rollers.
Background
The development of modern science and technology has greatly promoted the intellectuality of road roller, and more high-end technique is introduced the road roller field, makes the road roller constantly step forward towards more high-efficient, safer target. Can contain a lot of noises in the construction environment of road roller usually, the mode of making an uproar reduces the driver's cabin interior noise through physics in the host computer factory at present, and the physics is fallen to make an uproar and is often set up sound-proof material through the car, keeps apart the noise, and this kind of mode can increase the manufacturing cost of vehicle to the effect of keeping apart the noise is not ideal, and input-output ratio is lower, and long-term construction noise has brought very big physiological injury for navigating mate.
The vibratory roller is except the noise that has the engine to produce, and the noise energy that is produced by vibration wheel itself is bigger to road roller vibration frequency is the low-frequency range, is close to human resonant frequency, makes operating personnel in the work progress, and health and ear receive dual examination, make navigating mate produce fatigue easily, reduce the efficiency of construction, increase the construction risk. And some prompting sounds exist in the environment, are mixed in noise and are covered to a great extent, so that the prompting effect on personnel is reduced.
And the double-steel-wheel vibratory roller is different from a common single-steel-wheel vibratory roller, the front steel wheel and the rear steel wheel of the double-steel-wheel vibratory roller are respectively used as noise sources to apply noise into a cab through different paths, wherein the double-steel-wheel vibratory roller has a beat frequency phenomenon, namely the vibration noise of the front steel wheel and the vibration noise of the rear steel wheel are periodically superposed together, so that the noise level is very high, and the damage to a human body is very large.
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 skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a noise reduction system and method for a double-steel-wheel vibratory roller and the vibratory roller, and solves the problem that the noise in a cab is overlarge due to a beat frequency phenomenon in the conventional double-steel-wheel vibratory roller.
In order to achieve the above purpose/to solve the above technical problems, the present invention is realized by adopting the following technical scheme:
in a first aspect, the noise reduction system of the vibratory roller with the double steel wheels comprises a vehicle-mounted main controller, an acoustic unit for outputting sound waves, a feedback front end for acquiring the grade and phase of vibratory noise and a human-computer 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 human-computer interaction display, and the human-computer interaction display can input a control instruction to the vehicle-mounted main controller and display the 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 an acoustic unit; the output end of the feedback front end is connected with the acoustic controller;
and the vehicle-mounted main controller is connected with a plurality of frequency sensors for measuring the vibration frequency of the steel wheels of the road roller.
Optionally, the acoustic unit is a dual-voice coil loudspeaker, the acoustic unit is controlled by two-path cross signals of the acoustic controller, and the acoustic cavity is used for providing a space for the loudspeaker to compress air and preventing sound waves generated in the front and the back of the loudspeaker from offsetting each other.
Optionally, the acoustic unit is connected with an acoustic cavity, and a cavity of the acoustic cavity is a closed cavity or an open cavity.
Optionally, the vehicle-mounted main controller is connected with a plurality of vibration ratio pumps for adjusting frequency difference of steel wheels of the vibratory roller, the vibration ratio pumps are controlled by the vehicle-mounted main controller, the vehicle-mounted main controller obtains vibration frequency of the double steel wheels in real time, the vibration frequency difference of the double steel wheels is adjusted by adjusting discharge capacity of different vibration ratio pumps, and beat frequency phenomenon is weakened.
Optionally, the human-computer interaction display is provided with a key for actively reducing noise of the 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 vibratory roller with two steel wheels, which adopts the noise reduction system for a vibratory roller with two steel wheels, includes the following steps:
A. pressing a key for automatically calibrating the vibration frequency of the steel wheels of the vibratory roller, and adjusting the vibration frequency difference of the two steel wheels;
B. e, after a key for actively reducing noise is started on a human-computer interaction display and pressed down, judging that the current vibration is double-wheel vibration, and then, skipping to the step E, and if the vibration is single-wheel vibration, sequentially executing the steps;
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 sound waves for inhibiting vibration noise through a voice coil;
D. the feedback front end collects the vibration noise level and the phase in real time, transmits the collected data to the acoustic controller, the acoustic controller superposes the collected data with the currently output sound pressure waveform, updates the sound pressure waveform, and repeats the step C until the comprehensive sound pressure level is reduced to a reasonable range;
E. the vehicle-mounted main controller reads the vibration frequencies of the two steel wheels in real time, wherein the vibration frequencies are respectively f1And f2The frequency is sent to an acoustic controller in real time, the acoustic controller respectively calculates default waveforms corresponding to each frequency, final results are superposed 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 the vibration noise level and phase in real time and transmits the collected data to an acoustic controller, and acousticsThe controller obtains the actual phase difference of the vibration noise of the two steel wheels and the respective central frequency f through Fourier change1' and f2', judging the current f by the phase difference1' faster than f2' time t, reading the conversion factor k in the storage medium, obtaining the vibration frequency adjustment time t2K, the acoustic controller will t2Sending to the vehicle-mounted main controller, and increasing f2' corresponding to the vibration frequency of the steel wheel and maintaining t2After the time, the original frequency current value is recovered, and the step D is repeated until the phase difference is less than the target value t0。
In a third aspect, a vibratory roller includes the noise reduction system of the double-steel-wheel vibratory roller.
Compared with the prior art, the invention has the following beneficial effects:
the noise level and the phase are acquired by setting the feedback front end in real time, 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 superposes 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 caused by the beat frequency phenomenon of the double steel wheels 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 view of a noise reduction system of a vibratory roller with two steel wheels according to an embodiment of the present invention;
fig. 2 is a schematic view of a vibratory roller according to an embodiment of the present 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 proportioning 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 illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention, in which description, "plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected 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 through specific situations.
Example one
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 human-computer interaction display 5;
the vehicle-mounted main controller 1 comprises a processor and a storage medium, 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 human-computer interaction display 5 through buses, the human-computer interaction display 5 is installed in a cab of the vibratory roller, people can input control instructions to the vehicle-mounted main controller 1 through the human-computer interaction display 5, and the human-computer interaction display 5 can display output contents of the vehicle-mounted main controller 1;
the vehicle-mounted main controller 1 is connected with two frequency sensors 6, the precision of the two frequency sensors 6 for reading the frequency 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 frequency of the two steel wheels of the roller, the frequency sensors 6 in the embodiment are passive magnetic induction sensors, parameters are obtained by cutting magnetic induction lines, the precision of the frequency can be read to be not lower than 0.1Hz, and the vehicle-mounted main controller 1 can read the vibration frequency of the two steel wheels in real time through the frequency sensors 6;
the feedback front end 4 is installed 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 collects the vibration noise level and the phase in the cab in real time and transmits the collected data to the acoustic controller 2; the output end of the acoustic controller 2 is connected with an acoustic unit 3, the acoustic unit 3 is installed in a cab of the vibratory roller, the acoustic unit 3 is a double-voice-coil loudspeaker, an acoustic cavity 8 is installed on the acoustic unit 3, 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 compressing air for the loudspeaker, and meanwhile, sound waves generated in the front and at the back of the loudspeaker are prevented from being mutually offset; the acoustic unit 3 is controlled by two paths of cross 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 the cab;
the man-machine interaction display 5 is provided with a key for switching on and off active noise reduction 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 proportional pumps 7, proportional electromagnetic valves of the vibration proportional pumps 7 are controlled by the vehicle-mounted main controller 1, the two vibration proportional pumps 7 are respectively arranged on two steel wheels of the vibratory roller, a target frequency value is set on a human-computer interaction display 5 by people, after a key for automatically calibrating the vibration frequency of the steel wheels of the vibratory roller is pressed, the rotating speed of an engine is automatically increased to a rated rotating speed, 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 discharge capacity of one vibration proportional pump 7, the vehicle-mounted main controller 1 acquires the vibration frequency of the steel wheels in real time through a frequency sensor 6, and controls the vibration frequency of the corresponding steel wheel of the vibration proportional pump 7 within +/-0.5 Hz of the target frequency value through closed-loop regulation, storing the current value corresponding to the vibration frequency into a storage medium of the vehicle-mounted main controller 1, and recording as the current frequency; the vehicle-mounted main controller 1 converts a current value corresponding to the current frequency into a PWM duty ratio to control the discharge capacity of another vibration proportional pump 7, the vehicle-mounted main controller 1 obtains the vibration frequency of another steel wheel in real time through another frequency sensor 6, the vibration frequency of the steel wheel is controlled within +/-0.5 Hz range of the current frequency through closed-loop regulation, 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 rotating speed of an engine is recovered to an idle speed, a man-machine interaction display 5 prompts that calibration is completed, the two frequencies are closer by controlling the vibration frequencies of the two steel wheels, and the 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 wheels 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 an active noise reduction key is started on the man-machine interaction display 5 and pressed down, the vehicle-mounted main controller 1 judges that the current double-wheel vibration is adopted, the step E is skipped, and if the single-wheel vibration is adopted, the sequential execution is carried out;
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 sound waves for inhibiting vibration noise through a voice coil;
D. the feedback front end 4 collects the vibration noise level and the phase in real time, transmits the collected data to the acoustic controller 2, the acoustic controller 2 superposes the collected data with the currently output sound pressure waveform, updates the sound pressure waveform, and repeats the step C 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 the two steel wheels in real time, wherein the vibration frequencies are respectively f1And f2The frequency is sent to an acoustic controller in real time, the acoustic controller respectively calculates default waveforms corresponding to each frequency, final results are superposed 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 transmits the collected data to the acoustic controller 2, and the acoustic controller 2 obtains the actual phase difference of the vibration noise of the two steel wheels and the respective central frequency f through Fourier change1' and f2', judging the current f by the phase difference1' faster than f2' time t, reading the conversion factor k in the storage medium to obtain the vibration frequency adjustment time t2= t k, acoustic controller 2 will t2Sending the data to the vehicle-mounted main controller 1, and increasing f by the vehicle-mounted main controller 12' corresponding to the vibration frequency of the steel wheel and maintaining t2After the time, the current value of the original frequency is recovered, the current value of the original frequency is the current value corresponding to the frequency when the vehicle vibrates before the step A is carried out, and the step D is repeated until the phase difference is less than the target value t0Target value t0For the target value of the final control of the system, i.e., the vibration phase of the front and rear wheels cannot be 100% synchronized, t0The minimum value that the system can achieve, which is affected by the system, is not a fixed, specific value.
EXAMPLE III
A vibratory roller comprises the noise reduction system of the double-steel-wheel vibratory roller.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A noise reduction system of a 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 the vibration noise level and phase and a human-computer 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 human-computer interaction display, and the human-computer interaction display can input a control instruction to the vehicle-mounted main controller and display the 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 an acoustic unit; the output end of the feedback front end is connected with the acoustic controller;
and the vehicle-mounted main controller is connected with a plurality of frequency sensors for measuring the vibration frequency of the steel wheels of the road roller.
2. The noise reduction system of the double-steel-wheel vibratory roller as claimed in claim 1, wherein the acoustic unit is a double-voice-coil horn, and the acoustic unit is controlled by two cross signals of the acoustic controller.
3. The noise reduction system of the double-steel-wheel vibratory roller as claimed in 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. The system of claim 1, wherein the vehicle-mounted master controller is coupled to a plurality of vibration proportioning pumps for adjusting the frequency difference between the wheels of the vibratory roller.
5. The system of claim 1, wherein the human-computer interaction display comprises a button for switching on and off active noise reduction and a button for automatically calibrating vibration frequency of steel wheels of the vibratory roller.
6. A noise reduction method for a double-steel-wheel vibratory roller is characterized in that the noise reduction system for the double-steel-wheel vibratory roller as claimed in any one of claims 1-5 is adopted, and the noise reduction method comprises the following steps:
A. pressing a key for automatically calibrating the vibration frequency of the steel wheels of the vibratory roller, and adjusting the vibration frequency difference of the two steel wheels;
B. e, after a key for actively reducing noise is started on a man-machine interaction display and pressed down, the current double-wheel vibration is carried out, and if the current double-wheel vibration is carried out, the step E is carried out sequentially;
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 sound waves for inhibiting vibration noise through a voice coil;
D. the feedback front end collects the vibration noise level and the phase in real time, transmits the collected data to the acoustic controller, the acoustic controller superposes the collected data with the currently output sound pressure waveform, updates the sound pressure waveform, and repeats the step C until the comprehensive sound pressure level is reduced to a reasonable range;
E. the vehicle-mounted main controller reads the vibration frequencies of the two steel wheels in real time, wherein the vibration frequencies are respectively f1And f2The frequency is sent to an acoustic controller in real time, the acoustic controller respectively calculates default waveforms corresponding to each frequency, final results are superposed 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 the vibration noise level and phase in real time and transmits the collected data to the acoustic controller, and the acoustic controller obtains the actual phase difference of the vibration noise of the two steel wheels and the respective central frequency f through Fourier change1' and f2', judging the current f by the phase difference1Faster thanf2' time t, reading the conversion factor k in the storage medium to obtain the vibration frequency adjustment time t2K, the acoustic controller will t2Sending to the vehicle-mounted main controller, and increasing f2' corresponding to the vibration frequency of the steel wheel and maintaining t2After the time, the original frequency current value is recovered, and the step D is repeated until the phase difference is less than the target value t0。
7. A vibratory roller comprising the dual drum vibratory roller noise reduction system of any one of claims 1-6.
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 |
|---|---|
| CN114703722A true CN114703722A (en) | 2022-07-05 |
| CN114703722B CN114703722B (en) | 2024-03-29 |
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| CN202210246256.5A Active CN114703722B (en) | 2022-03-14 | 2022-03-14 | Noise reduction system and noise reduction method of double-steel-wheel vibratory roller and vibratory roller |
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| JPH05280586A (en) * | 1992-04-03 | 1993-10-26 | Honda Motor Co Ltd | Vibration noise control device for vehicle |
| 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 | Control device, method and system of clap-frequency vibration noise and engineering machinery |
| CN103541295A (en) * | 2013-11-07 | 2014-01-29 | 中联重科股份有限公司 | Tandem road roller vibration hydraulic system and control method as well as 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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2022
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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 vehicle |
| 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 | Control device, method and system of clap-frequency vibration noise and engineering machinery |
| CN103541295A (en) * | 2013-11-07 | 2014-01-29 | 中联重科股份有限公司 | Tandem road roller vibration hydraulic system and control method as well as 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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| CN114703722B (en) | 2024-03-29 |
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