IT202100000980A1 - SYSTEM FOR REDUCING VIBRATIONS AND/OR NOISE. - Google Patents

Description

SYSTEM FOR REDUCING VIBRATIONS AND/OR NOISE

DESCRIPTION

The present invention relates to a system for reducing vibrations and/or noise.

The revitalization of historic centers, made up in many realities? from narrow alleys and streets of historical origin, has it brought, and carries, with it? a variety problems for the resident population.

The redevelopment of areas or districts frequently takes the form of the restructuring and opening of businesses on the ground floor of historic buildings. of catering and used for entertainment and recreation.

This type of activity? ? designed to attract a large segment of the population, often young people.

Frequently, what? is added the opening or redevelopment, in the same urban areas, of centers of cultural interest, such as universities and colleges, which in turn contribute to increasing the attendance of areas of the city? previously neglected.

In the evening and at night, the clubs become points of attraction for groups, especially young people, inevitably raising the level of noise pollution in the area.

However, the same buildings continue to be inhabited on the upper floors, in many cases by the same families who lived there in the years or decades prior to the redevelopment of the area.

? the discomfort of these residents is therefore evident, who find themselves in a short time having to live with noises and shouts to which they were not used to.

The management of public peace at night is therefore becoming a fairly common problem, both in the provincial capitals and in the smaller towns. little ones.

The most widely implemented solutions today consist in issuing restrictive rules regarding nightlife, rules which however often lead to the reduction of the effectiveness of the policies implemented to revitalize urban areas.

Furthermore, "passive" systems are notoriously used to reduce the perceived noise, such as, for example, the soundproofing of buildings with special materials or the use of double glazing: however, these systems require structural modifications to the buildings, with related costs to be borne by part of the residents.

Active noise control, developed since the 1950s in the military sector, is a system present in many audio products, such as headphones and earphones, which aims to reduce the impact of unwanted ambient sounds.

In equipment that uses this system ? provided a microphone that perceives the noises that ? positioned in correspondence with the area where the noise must be canceled (that is, near the user's ear), making it possible to cancel more effectively. simple and precise.

In the automotive field, active noise control ? used, for example, to reduce engine noise inside the passenger compartment.

The active noise control applied to external environments (the so-called Outdoor Active Noise Control) ? subject of research and extremely dedicated applications, both for the fact that the problem ? by itself mathematically more complex, both why? each different application ? characterized by a different environment in which ? necessary to operate.

In any case, noise reduction systems have been proposed in outdoor environments such as gardens, near of roads and airports, but such systems require an extremely invasive intervention due to the necessity? to install a large amount? of sensors and actuators.

The task of this invention? that of realizing a system for reducing vibrations and/or noise which is capable of improving the prior art in one or more? of the above aspects.

Within the scope of this aim, an object of the invention is that of making available a system for reducing vibrations and/or noise that does not require structural interventions on existing buildings.

Another purpose of the invention? to propose a system for the reduction of vibrations and/or noise that does not even affect the integrity? visual of the buildings, allowing their use and installation even in contexts of particular architectural value.

An additional purpose? that of identifying a system for reducing vibrations and/or noise capable of maximizing performance, while minimizing the number of necessary components, and the related costs.

Not the last purpose of the invention ? that of creating a system for reducing vibrations and/or noise which is highly reliable, relatively easy to implement and at competitive costs.

This task, as well as these and other objects which will become apparent hereinafter are achieved by a system for reducing vibrations and/or noise according to claim 1, optionally equipped with one or more? of the characteristics of the dependent claims.

Further characteristics and advantages of the invention will become clearer from the description of some preferred, but not exclusive, embodiments of the system for reducing vibrations and/or noise according to the invention, illustrated, for indicative and non-limiting purposes, in the attached drawings, in which:

figure 1 shows a perspective view of an environment in which the device according to the invention is inserted;

figure 2 ? an exploded schematic view of the electronic control card;

figure 3 ? a top view of the device for reducing vibration and/or noise;

figure 4 ? a section of the device for reducing vibrations and/or noise along the lying plane identified by line IV-IV of figure 3.

With reference to the cited figures, the system for reducing vibrations and/or noise according to the invention, globally indicated with the reference number 1, comprises a structure subject to vibrations 2 and at least one device for reducing vibrations and/or of the noise 3.

The vibration and/or noise reduction device 3 comprises an electronic control card 4 supporting an accelerometer 5 configured to detect the vibrations at which ? subject the structure subject to vibrations 2, and a microcontroller 6 configured to control, on the basis of the vibrations detected by the accelerometer 5 and at least one algorithm configured to calculate an appropriate response function 5, an actuator 7.

The actuator 7 ? permanently associated with the structure subject to vibrations 2 and ? operated by the microcontroller 6 cos? to allow the reduction of the vibrations detected by the accelerometer 5 to which ? subject the structure subject to vibrations 2.

With reference to the embodiment shown in the figures, the actuator 7 and the accelerometer 5 are associated with the electronic control card 4 substantially in correspondence with the same portion.

In particular, the actuator 7 circumscribes a free area of the electronic control board 4, within which ? placed the accelerometer 5.

The electronic control card 4 also comprises an analog converter 8 configured to convert the analog signal output from the accelerometer 5 into a digital signal usable by the microcontroller 6.

Preferably, the structure subject to vibrations 2 comprises a flat architectural element comprising, for example, a glass 2a, in particular a window pane.

The flat architectural element can also include plywood/plasterboard partition walls within rooms, or sound-absorbing panels placed on the ceiling.

The structure subject to vibrations 2 can? also include glass cases for the protection of the contents, or sheet metal covers for kitchen extractor hoods.

The electronic control card 4 also comprises an amplifier 9 arranged between the microcontroller 6 and the actuator 7.

According to a preferred embodiment, the electronic control card 4 has a discoidal structure extending around an axis 100 of the card.

Preferably, the accelerometer 5 ? arranged in correspondence with the axis 100 of the card.

Conveniently, the actuator 7 extends around the axis 100 of the card.

In practice, the actuator 7 ? arranged around the accelerometer 5.

The electronic control board 4 has a first flat surface 4a, which ? intended to be stably associated with the structure subject to vibrations 2, and a support surface 4b, which is instead intended to support the accelerometer 5, the microcontroller 6, the actuator 7 and all the other electrical and electronic components associated with the electronic control board 4.

According to a preferred embodiment, the electronic control card 4 is made of glass fiber reinforced epoxy laminate material and is between 0.8 mm and 1.6 mm thick.

Preferably, the electronic control card 4 has a thickness of between 0.8 mm and 1.2 mm.

The material with which? Once the electronic control board 4 has been made, it can, for example, consist of a composite material made up of a glass fiber fabric interwoven with an epoxy resin binder which is fireproof and very resistant to mechanical stress.

The identified thickness allows the electronic control card 4 to follow the ?movements? of the structure subject to vibrations 2.

In particular, since the accelerometer 5 ? bound to the electronic control board 4, ? separated from the vibrating structure 2 which moves due to unwanted noise from the flat circuit board 4 and the adhesive which acts as a damper.

For this reason, if the thickness of the electronic control card 4 is too thick, and therefore rigid, it will not be allowed to follow the movements of the architectural plan, but rather will extend? the adhesive elastically.

In this condition, would the accelerometer 5 detect a dynamic which is not? the correct one of the flat architectural element, and therefore the algorithm could not correctly guide the actuator 7.

Having instead used an electronic control card 4 with a particularly reduced thickness, this will follow? faithfully the movement of the flat architectural element and will transmit? to the accelerometer 5 the deformations induced by the noise.

The vibration and/or noise reduction device 3 comprises a support body 10 for the electronic control board 4.

The support body 10 defines a housing seat for a power supply battery 11, which ? connected to the electronic control card 4.

The use of the system for reducing vibrations and/or noise according to the invention ? the following.

The device 3 for reducing vibrations and/or noise is stably associated, for example by using double-sided adhesive films, to the face facing the inside of the building of a flat architectural element, typically the glass 2a of a window or a window in general.

The accelerometer 5, supported directly by the electronic control card 4, detects the vibrations, due to vibrations and/or noise outside the building, to which ? subject the glass 2a.

The values measured by the accelerometer 5 are transformed from analogical to digital and supplied to the microcontroller 6 which, on the basis of an algorithm, controls the actuator 7, in such a way as to reduce the effects of the vibrations or noise to which ? subject the glass 2a.

Yes ? in practice it has been observed that the invention achieves the intended aim and objects, providing an extremely effective noise reduction system.

Having foreseen the positioning of the accelerometer 5 directly on the electronic control board 4, and of the actuator 7 coaxial to the accelerometer 5 has allowed to optimize the process managing to reduce the perceived noise in an extremely significant way.

The found, what? conceived, ? susceptible to numerous modifications and variations, all of which are within the scope of the inventive concept; furthermore, all the details may be replaced by other technically equivalent elements.

In practice, the materials used, provided? compatible with the specific use, as well as? the contingent dimensions and shapes may be any according to the requirements and to the state of the art.

Where features and techniques mentioned in any claim are followed by reference marks, have those marks been affixed for the sole purpose of enhancing intelligibility? of the claims and consequently such reference marks have no limiting effect on the interpretation of each element identified by way of example by such reference marks.

Claims (11)

1. System for reducing vibrations and/or noise (1) comprising a structure subject to vibrations (2) and at least one device for reducing vibrations and/or noise (3) associated with said structure subject to vibrations ( 2), characterized in that said device for reducing vibrations and/or noise (3) comprises an electronic control board (4) supporting an accelerometer (5) configured to detect the vibrations at which ? subject said structure subject to vibrations (2), and a microcontroller (6) configured to control, on the basis of the vibrations detected by said accelerometer (5) and at least one algorithm configured to calculate an appropriate response function (5), an actuator (7), said actuator being stably associated with said structure subject to vibrations (2) and being actuated by said microcontroller so to allow the reduction of the vibrations detected by said accelerometer (5) to which ? subject said structure subjected to vibrations (2). 2. System for reducing vibrations and/or noise (1), according to claim 1, characterized in that said actuator (7) and said accelerometer (5) are associated with said electronic control card (4) substantially in correspondence of the same portion of said electronic control board (4). 3. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that said structure subject to vibrations (2) comprises a flat architectural element. 4. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that it comprises an amplifier (9) disposed between said microcontroller (6) and said actuator (7). 5. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that said electronic control card (4) has at least one axis (100) of the card, said accelerometer (5) being arranged in correspondence with said axis (100) of the card and said accelerometer (5) being arranged in correspondence with said axis (100) of the card. 6. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that said electronic control card (4) has a disc-shaped structure extending around an axis (100) of the card, said accelerometer (5) and said actuator (7) extending around said axis (100) of the card. 7. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that said electronic control card (4) has a first flat surface (4a) intended to be stably associated with said structure subject to vibrations (2) and a support surface (4b) intended to support said accelerometer (5), said microcontroller (6) and said actuator (7). 8. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that said electronic control card (4) has a thickness of between 0.8 mm and 1.6 mm. 9. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that said electronic control card (4) has a thickness of between 0.8 mm and 1.2 mm. 10. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that it comprises a support body (10) for said electronic control card (4), said support body defining a housing seat for a power supply battery (11) connected to said electronic control card (4). 11. Vibration and/or noise reduction system (1), according to one or more of the preceding claims, characterized in that said electronic control board (4) comprises an analog converter (8) configured to convert the analog output signal from said accelerometer (5) into a digital signal usable by said microcontroller (6).