CN214175677U

CN214175677U - Vibratory roller and active noise reduction system thereof

Info

Publication number: CN214175677U
Application number: CN202022923273.7U
Authority: CN
Inventors: 薛力戈; 高亮; 武博文; 张天骄; 骆城; 张笑语; 范廷锴
Original assignee: Xuzhou XCMG Road Construction Machinery Co Ltd
Current assignee: Xuzhou XCMG Road Construction Machinery Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-09-10
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a vibratory roller active noise reduction system, which comprises a sound cavity, an acoustic unit, an acoustic controller, an engine ECU, a frequency sensor, a vehicle-mounted main controller, a human-computer interaction display, a feedback front end and a power module; the output end of the frequency sensor is connected with the vehicle-mounted main controller, and the output end of the vehicle-mounted main controller is connected with the human-computer interaction display and the acoustic controller; the output end of the feedback front end is connected with an acoustic controller, the output end of the acoustic controller is connected with an acoustic unit, and the acoustic cavity is connected with the acoustic unit; the engine ECU is respectively connected with the acoustic controller and the vehicle-mounted main controller; the utility model discloses a final initiative noise reduction strategy is synthesized to the acoustic controller to drive acoustic unit release noise suppression sound wave, reduce the driver's cabin interior noise, promote operating personnel comfort level, reduce arranging of automobile body sound-proof material, sparingly fall the cost of making an uproar.

Description

Vibratory roller and active noise reduction system thereof

Technical Field

The utility model relates to a vibratory roller initiative noise reduction system and vibratory roller belongs to road roller auxiliary driving technical field.

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.

Moreover, the vibration road roller has the advantages that the noise energy generated by the vibration wheel is larger except the noise generated by the engine, the vibration frequency of the road roller is low frequency band and is close to the resonance frequency of a human body, so that the body and ears of an operator are subjected to double tests in the construction process, a driver is easy to fatigue, the construction efficiency is reduced, and the construction risk is increased. 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.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the prior art, provide vibrated roller initiative noise reduction system and vibrated roller.

The vibratory roller active noise reduction system comprises a sound cavity, an acoustic unit, an acoustic controller, an engine ECU (electronic control unit), a frequency sensor, a vehicle-mounted main controller, a man-machine interaction display, a feedback front end and a power supply module;

the output end of the frequency sensor is connected with a vehicle-mounted main controller, and the data interaction end of the vehicle-mounted main controller is connected with a human-computer interaction display, an engine ECU (electronic control unit) and an acoustic controller through a bus;

the output end of the feedback front end is connected with an acoustic controller, the output end of the acoustic controller is connected with an acoustic unit, and the acoustic cavity is connected with the acoustic unit;

and the power supply end of the engine ECU is respectively connected with the acoustic controller and the vehicle-mounted main controller.

Furthermore, a signal end of the frequency sensor is connected with a number pin of the vehicle-mounted main controller, and the number pin of the vehicle-mounted main controller is connected with a ground wire end of the frequency sensor;

the L end of the engine ECU is respectively connected with the L end of the vehicle-mounted main controller and the L end of the power supply module; the M end of the engine ECU is respectively connected with the M end of the vehicle-mounted main controller and the M end of the power supply module;

pins

1, 2, 3 and 4 of the acoustic controller are correspondingly connected with

pins

1, 2, 3 and 4 of the acoustic unit respectively, and are two paths of alternating signals respectively; the signal end and the power end of the acoustic controller are correspondingly connected with the signal end and the power end of the feedback front end;

and the power end of the human-computer interaction display is connected with the power end of the acoustic controller.

Further, the sound cavity is a closed cavity or an open cavity.

Furthermore, the keys for starting and closing the active noise reduction function are arranged on the human-computer interaction display.

A vibratory roller comprising any one of the active noise reduction systems described above.

Further, the vibratory roller comprises a first hinge structure section and a second hinge structure section which are connected through a hinge frame;

the first articulated structure section comprises a first vehicle body and a cab arranged on the first vehicle body;

the front side of the cab is provided with front wheels;

the second articulating structure section comprises a second vehicle body; and a rear wheel is arranged at the rear side position of the second vehicle body.

Further, the frequency sensor is mounted on the vibrating wheel of the first vehicle body and/or the second vehicle body; the sound cavity is arranged in the cab; the acoustic unit is mounted on the acoustic cavity.

Compared with the prior art, the utility model discloses the beneficial effect who reaches: the utility model discloses install frequency sensor on the vibration steel wheel, gather the vibration frequency of vibration wheel in real time in road roller work progress, and acquire engine speed information through engine ECU, thereby generate the control strategy of initial noise suppression sound wave, gather the environmental noise change that produces by the sound wave of making an uproar through the feedback front end, synthesize final initiative noise reduction strategy through the acoustics controller finally, thereby drive acoustics unit release sound wave of making an uproar, reduce the noise in the driver's cabin, promote operating personnel comfort level, reduce the arrangement of automobile body sound insulation material, save noise reduction cost;

the utility model discloses simple to use, convenient operation have high commercial value.

Drawings

FIG. 1 is a schematic view of the system of the present invention;

FIG. 2 is a schematic diagram of the electrical principle of the present invention;

FIG. 3 is a schematic diagram of the electrical principle of the present invention;

fig. 4 is a schematic view of the vibratory roller of the present invention.

In the figure: 1. an acoustic cavity; 2. an acoustic unit; 3. an acoustic controller; 4. an engine ECU; 5. a frequency sensor; 6. a vehicle-mounted main controller; 7. a human-computer interaction display; 8. a feedback front end; 9. a first hinge structure section; 91. a first vehicle body; 92. a cab; 93. a front wheel; 10. a second hinge structure section; 101. a second vehicle body; 102. a rear wheel; 11. and a hinged frame.

Detailed Description

The present invention will be further described 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 the orientations or positional relationships 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 device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1-3, an active noise reduction system of a vibratory roller is disclosed, which comprises a sound cavity 1, an acoustic unit 2, an acoustic controller 3, an engine ECU4, a frequency sensor 5, a vehicle-mounted main controller 6, a human-computer interaction display 7, a feedback front end 8 and a power module;

the output end of the frequency sensor 5 is connected with a vehicle-mounted main controller 6, and the data interaction end of the vehicle-mounted main controller 6 is connected with a human-computer interaction display 7, an engine ECU4 and an acoustic controller 3 through a bus;

the output end of the feedback front end 8 is connected with the acoustic controller 3, the output end of the acoustic controller 3 is connected with the acoustic unit 2, and the acoustic cavity 1 is connected with the acoustic unit 2; the power supply end of the engine ECU4 is connected with the acoustic controller 3 and the vehicle-mounted main controller 6 respectively.

The specific electrical connection principle is as follows: the signal end of the frequency sensor 5 is connected with a pin No. 1 of the vehicle-mounted main controller 6, and a pin No. 2 of the vehicle-mounted main controller 6 is connected with a ground wire end of the frequency sensor 5;

the L end of the engine ECU4 is respectively connected with the L end of the vehicle-mounted main controller 6 and the L end of the power supply module; the M end of the engine ECU4 is respectively connected with the M end of the vehicle-mounted main controller 6 and the M end of the power module;

pins

1, 2, 3 and 4 of the acoustic controller 3 are correspondingly connected with

pins

1, 2, 3 and 4 of the acoustic unit 2, respectively, and are two paths of alternating signals output1+ -and output2+ -; the signal end and the power end of the acoustic controller 3 are correspondingly connected with the signal end and the power end of the feedback front end 8; and the power supply end of the human-computer interaction display 7 is connected with the power supply end of the acoustic controller 3.

The acoustic unit 2 is configured as a double-voice-coil loudspeaker and is respectively controlled by two paths of alternating signals of an acoustic controller, so that the low-frequency vibration effect of the vibratory roller is better, and the vibratory roller can bear larger power;

in the construction process of the road roller, as shown in fig. 1, a front wheel 93 is arranged on the front side of a cab 92, the front wheel 93 can be a steel wheel, a rear wheel 102 is arranged on the rear side of a second vehicle body 101, the rear wheel 102 can be a steel wheel or a tire, the steel wheel is a vibrating wheel, the steel wheel can vibrate periodically in the construction process, the vibration of the vehicle body and air can be caused in the process, and great noise is released to the environment and the cab.

Wherein the acoustic chamber 1 is mounted to the first articulated structure section 9, for example, the acoustic chamber 1 may be mounted on top of the inner chamber of the cab 92, or mounted behind and below the inner chamber of the cab 92, the acoustic chamber 1 is configured to block the sound waves from the front and back of the acoustic unit to cancel out the sound waves by meeting, and the volume of air left enough for the acoustic unit 2 to compress when the vibration occurs, and the acoustic chamber 1 may be a closed type acoustic chamber or an open type acoustic chamber.

The acoustic unit 2 is mounted on the acoustic chamber 1, and a sound emitting surface of the acoustic unit 2 faces the inside of the cab. The acoustic unit 2 is configured to release the noise-suppressed sound wave determined by the acoustic controller for suppressing the noise in the cab. The acoustic unit 2 may be a loudspeaker, such as a cone diaphragm horn, a synthetic fiber diaphragm horn, or the like.

The frequency sensor 5 is arranged on the vibrating wheel of the first vehicle body and/or the second vehicle body and is configured to acquire the real-time vibration frequency of the vibrating wheel in the construction process; for example, if the front wheel of the single steel wheel roller is a vibrating wheel, the frequency sensor 5 is installed on the front steel wheel, if the front wheel and the rear wheel of the double steel wheel roller are vibrating wheels, the frequency sensor 5 is installed on the front steel wheel and the rear steel wheel, and the frequency sensor 5 can be a frequency sensor or a proximity switch.

An in-vehicle main controller 6 configured to receive the frequency sensor 5 and to transmit a real-time vibration frequency signal of the vibrating wheel to the acoustic controller 3; for example, the in-vehicle main controller 6 may be a DSP, a PLC controller, or the like.

The acoustic controller 3 is configured to receive real-time vibration frequency information transmitted by the vehicle-mounted main controller 6, rotating speed information of the engine ECU4 and environmental noise information collected by the feedback front end 8, and determine noise suppression sound waves through an active noise reduction algorithm; for example, the acoustic controller 3 may be a DSP, a PLC controller, or the like.

A feedback front end 8 configured to capture audio signals within the cab; for example, the feedback front end 8 may be a MIC.

A human-computer interaction display 7 configured to display the spectral characteristics of the noise in the cab collected in real time by the feedback front end 8; and a key arranged on the display to turn on and off the active noise reduction function.

The cavity of the sound cavity 1 is a closed cavity or an open cavity. And the man-machine interaction display 7 is provided with keys for starting and closing the active noise reduction function.

In the description of the present invention, it is to 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.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. The active noise reduction system of the vibratory roller is characterized by comprising an acoustic cavity (1), an acoustic unit (2), an acoustic controller (3), an engine ECU (4), a frequency sensor (5), a vehicle-mounted main controller (6), a man-machine interaction display (7), a feedback front end (8) and a power supply module;

the output end of the frequency sensor (5) is connected with a vehicle-mounted main controller (6), and the data interaction end of the vehicle-mounted main controller (6) is connected with a human-computer interaction display (7), an engine ECU (4) and an acoustic controller (3);

the output end of the feedback front end (8) is connected with the acoustic controller (3), the output end of the acoustic controller (3) is connected with the acoustic unit (2), and the acoustic cavity (1) is connected with the acoustic unit (2);

and the power supply end of the engine ECU (4) is respectively connected with the acoustic controller (3) and the vehicle-mounted main controller (6).

2. The vibratory roller active noise reduction system of claim 1, wherein a signal end of the frequency sensor (5) is connected with a pin 1 of the vehicle-mounted main controller (6), and a pin 2 of the vehicle-mounted main controller (6) is connected with a ground wire end of the frequency sensor (5);

the L end of the engine ECU (4) is respectively connected with the L end of the vehicle-mounted main controller (6) and the L end of the power supply module; the M end of the engine ECU (4) is respectively connected with the M end of the vehicle-mounted main controller (6) and the M end of the power module;

pins 1, 2, 3 and 4 of the acoustic controller (3) are correspondingly connected with pins 1, 2, 3 and 4 of the acoustic unit (2) respectively, and are two paths of alternating signals respectively; the signal end and the power end of the acoustic controller (3) are correspondingly connected with the signal end and the power end of the feedback front end (8);

and the power supply end of the human-computer interaction display (7) is connected with the power supply end of the acoustic controller (3).

3. The vibratory roller active noise reduction system of claim 1, wherein the cavity of the acoustic chamber (1) is a closed cavity or an open cavity.

4. The vibratory roller active noise reduction system of claim 1, wherein keys for turning on and off active noise reduction functions are arranged on the human-machine interaction display (7).

5. A vibratory roller comprising the active noise reduction system of any of claims 1-4.

6. The vibroroller according to claim 5, characterized in that it comprises a first articulated structure section (9) and a second articulated structure section (10) connected by an articulated frame (11);

the first articulated structure section (9) comprises a first vehicle body (91) and a cab (92) arranged on the first vehicle body (91);

a front wheel (93) is arranged on the front side of the cab (92);

the second articulated structure section (10) comprises a second vehicle body (101); and a rear wheel (102) is arranged at the rear side position of the second vehicle body (101).

7. The vibroroller according to claim 5, characterized in that the frequency sensor (5) is mounted on the vibratory wheel of the first body (91) and/or of the second body (101); the acoustic cavity (1) is arranged in a cab (92); the acoustic unit (2) is mounted on the acoustic cavity (1).