KR-20260067209-A - Noise reducing system and method using the same

KR20260067209AKR 20260067209 AKR20260067209 AKR 20260067209AKR-20260067209-A

Abstract

The present invention relates to a noise reduction system and method, and may include: a receiver installed in a part of the vehicle to measure one or more of vibrations and noises generated outside the cabin of the vehicle due to vibrations of the vehicle or noises outside the vehicle; a control unit that analyzes the vibrations or noises measured by the receiver and calculates an inverse phase; and an exciter installed in at least one part of a facet formed in the cabin and applying vibrations to the facet at a correction frequency for the inverse phase calculated by the control unit.

Inventors

이상대

Assignees

한국생산기술연구원

Dates

Publication Date: 20260512
Application Date: 20241105

Claims (14)

A receiver installed in a part of the vehicle to measure one or more of vibrations and noises generated outside the cabin of the vehicle due to vibrations of the vehicle or noises outside the vehicle; A control unit that calculates an inverse phase by analyzing vibration or noise measured by the receiver above; and An exciter installed in at least one part of a facet portion formed in the cabin above, which applies vibration to the facet portion at a correction frequency for the inverse phase calculated by the control unit; A noise reduction system including
In Article 1, The above control unit is, A noise reduction system that calculates the inverse phase capable of attenuating the vibration of the face portion so that vibration or noise can be canceled out at the face portion.
In Article 1, The above control unit is, A noise reduction system that calculates the inverse phase capable of generating sound outside the facet so that vibration or noise can be canceled out before reaching the facet.
In Article 1, The above control unit is, A detection unit that receives data regarding vibration or noise from the above receiver and detects the noise frequency; An inverse phase calculation unit for calculating an inverse phase for the above noise frequency; and A vibration application unit that transmits a correction frequency for the above inverse phase to the exciter and controls the exciter to apply the vibration of the above inverse phase; A noise reduction system including
In Article 1, The above control unit is, A detection unit that receives data regarding vibration or noise received from the above receiver and detects the noise frequency; An analysis unit that distinguishes between vibrations and noise that can be attenuated at the above-mentioned face part and vibrations and noise that can be canceled out before reaching the above-mentioned face part; An inverse phase calculation unit for calculating the inverse phase including one or more correction frequencies, such as a first frequency capable of attenuating vibrations of the facet portion so that vibrations or noises can be attenuated at the facet portion, or a second frequency capable of generating sound outside the facet portion so that vibrations or noises can be canceled out before reaching the facet portion; and A vibration application unit that transmits the above correction frequency to the above exciter and controls the application of the above inverse phase vibration at the above exciter; A noise reduction system including
In Article 1, The above receiver is, It is formed with at least two parts, installed on opposite sides relative to the cabin, and The above control unit is, Calculate the inverse phase in each direction, and The above-mentioned exciter is, A noise reduction system installed to form a pair with the receiver in the direction in which the receiver is installed, and which applies vibrations to face parts equipped with different correction frequencies according to the direction.
In Article 1, The above receiver is, A transmitter that wirelessly transmits data regarding received vibration or noise to the control unit; Includes, The above-mentioned exciter is, A receiver that wirelessly receives data regarding the above inverse phase from the control unit; A noise reduction system including
(a) A receiver installed in a part of the vehicle, which measures one or more of vibrations and noises generated outside the cabin of the vehicle due to vibrations of the vehicle or noises outside the vehicle; (b) a step of calculating an inverse phase by analyzing vibration or noise measured at the receiver; and (c) a step of applying vibration to the facet portion at a correction frequency for the inverse phase using an exciter installed in at least one part of the facet portion formed in the cabin; A noise reduction method including
In the above Clause 8, In step (b) above, A noise reduction method for calculating the inverse phase capable of attenuating vibrations of the face portion so that vibrations or noises can be attenuated in the face portion.
In the above Clause 8, In step (b) above, A noise reduction method that calculates the inverse phase capable of generating sound outside the facet portion so that vibration or noise can be canceled out before reaching the facet portion.
In the above Clause 8, The above step (b) is, (b-1) A step of receiving data regarding vibration or noise from the receiver and detecting the noise frequency; (b-2) A step of calculating an inverse phase for the above noise frequency; and (b-3) A step of transmitting a correction frequency for the inverse phase to the exciter, and controlling the application of the inverse phase vibration at the exciter; A noise reduction method including
In the above Clause 8, The above step (b) is, (b-1) A step of receiving data regarding vibration or noise received from the receiver and detecting the noise frequency; (b-4) A step of distinguishing between vibrations and noise that can be attenuated at the facet portion and noise that can be canceled out before reaching the facet portion; (b-5) A step of calculating the inverse phase including one or more correction frequencies, such as a first frequency capable of attenuating vibrations of the facet portion so that vibrations or noises can be attenuated at the facet portion, or a second frequency capable of generating sound outside the facet portion so that vibrations or noises can be canceled out before reaching the facet portion; and (b-6) transmitting the correction frequency to the exciter and controlling the application of the inverse phase vibration at the exciter; A noise reduction method including
In the above Clause 8, In step (a) above, The above receiver is formed with at least two units and installed on opposite sides relative to the cabin to measure vibration or noise from both sides. In step (b) above, Calculate the inverse phase in each direction, and In step (c) above, A noise reduction method in which the above-mentioned exciter is installed to form a pair with the receiver in the direction in which the receiver is installed, and vibrations are individually applied to face parts in which each exciter is installed with different correction frequencies depending on the direction.
In the above Clause 8, In step (a) above, Data regarding vibration or noise received from the above receiver is wirelessly transmitted to a control unit that calculates the inverse phase, and In step (c) above, A noise reduction method in which the above-mentioned exciter wirelessly receives data regarding the inverse phase from the above-mentioned control unit.

Description

Noise reduction system and method using the same The present invention relates to a noise reduction system and method, and more specifically, to a system and method for reducing noise inside construction machinery and vehicles. Generally, vehicles such as construction machinery, agricultural machinery, and special-purpose vehicles are equipped with a cabin for a driver to ride in, and the driver can operate the vehicle or operate the machinery from inside the cabin. Various noises may be generated during the operation of such vehicles or in the surroundings. In particular, as the structures constituting the cabin vibrate due to the wavelengths of external vibrations or noise, noise is transmitted into the cabin; such noise can affect the operator and reduce work efficiency. Accordingly, methods of applying sound-absorbing or sound-insulating materials to the interior have been used to reduce noise inside the cabin. In addition, although research is currently being conducted on devices capable of controlling noise or emitting white noise through separate speakers or vehicle speakers, noise reduction using sound-absorbing materials is not very effective. Furthermore, there are issues such as the need to install separate speakers to emit sound, which incurs costs, and the inability to effectively reduce noise transmitted into the vehicle interior. FIG. 1 is a conceptual diagram showing a vehicle equipped with an exciter according to one embodiment of the present invention. FIG. 2 is a conceptual diagram showing a receiver, an exciter, and a control unit of a noise reduction system according to one embodiment of the present invention installed in a cabin. FIG. 3 is a drawing showing a control unit according to an embodiment of the present invention. FIG. 4 is a drawing showing a control unit according to another embodiment of the present invention. FIGS. 5 and FIGS. 6 are drawings illustrating noise attenuation according to various embodiments of the present invention. FIG. 7 is a conceptual diagram showing a receiver, an exciter, and a control unit of a noise reduction system according to another embodiment of the present invention installed in a cabin. FIGS. 8 to 10 are flowcharts illustrating noise reduction methods according to various embodiments of the present invention. Hereinafter, several preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The embodiments of the present invention are provided to more fully explain the invention to those skilled in the art, and the following embodiments may be modified in various different forms, and the scope of the invention is not limited to the following embodiments. Rather, these embodiments are provided to make the disclosure more faithful and complete and to fully convey the spirit of the invention to those skilled in the art. In addition, the thickness or size of each layer in the drawings is exaggerated for convenience and clarity of explanation. Hereinafter, embodiments of the present invention are described with reference to drawings that schematically illustrate ideal embodiments of the present invention. In the drawings, variations of the illustrated shapes may be expected, for example, depending on manufacturing techniques and/or tolerances. Accordingly, embodiments of the inventive concept should not be interpreted as being limited to specific shapes of the areas illustrated herein, but should include, for example, variations in shape resulting from manufacturing. FIG. 1 is a conceptual diagram showing a vehicle with an exciter (30) installed according to one embodiment of the present invention, FIG. 2 is a conceptual diagram showing a receiver (10), an exciter (30), and a control unit (20) of a noise reduction system according to one embodiment of the present invention installed in a cabin (2), FIG. 3 and FIG. 4 are drawings showing a control unit (20) according to various embodiments of the present invention, and FIG. 5 and FIG. 6 are drawings showing noise reduction according to various embodiments of the present invention. First, a noise reduction system according to one embodiment of the present invention may include a receiver (10), a control unit (20), and an exciter (30). As illustrated in FIG. 1, a receiver (10) may be installed in a part of the vehicle (1) so as to measure one or more of the vibrations and noises that occur outside the cabin (2) of the vehicle (1) due to vibrations of the vehicle (1) or noises outside the vehicle (1). Specifically, the receiver (10) can detect engine noise and vibration of the vehicle (1) generated during driving, and various noise and vibration generated by equipment or machinery around the construction site. The receiver (10) is formed to be attachable or bondable and can be installed on the outside of the face portion (3). For example, the receiver (10) can be installed on at least a part of the exterior of the vehicle (1), and preferably on the