CN212220227U

CN212220227U - Rail transit seat structure loaded with active noise reduction module

Info

Publication number: CN212220227U
Application number: CN202020623020.5U
Authority: CN
Inventors: 崔强; 霍习策; 董宏达
Original assignee: Xi'an Cloud Vein Intelligent Technology Co ltd
Current assignee: Xi'an Cloud Vein Intelligent Technology Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-12-25
Anticipated expiration: 2030-04-23

Abstract

The utility model relates to the technical field of traffic seats, and discloses a track traffic seat structure loaded with an active noise reduction module, which is provided with a reference microphone, an error microphone and a loudspeaker; the seat is provided with an active noise reduction controller which is respectively electrically connected with a reference microphone, an error microphone and a loudspeaker, an active noise reduction module comprises one set of loudspeaker components and at most four sets of loudspeaker components, and the loudspeaker components and the seat framework or the headrest are fixedly installed inside. The utility model discloses a speaker subassembly, reference microphone and the initiative controlgear of making an uproar that falls, speaker subassembly is including speaker, error microphone and the cavity of raising one's voice simultaneously, and the initiative is fallen the noise core control device of making an uproar that falls and is equipped with on the controlgear of making an uproar that falls, has realized falling the initiative on high-speed railway one grade of seat and has fallen the noise of making an uproar, mainly improves the noise in low frequency region to promote the comfort level that the passenger took, improved the rationality and the feasibility of device.

Description

Rail transit seat structure loaded with active noise reduction module

Technical Field

The utility model relates to a traffic seat technical field specifically is a track traffic seat structure of module of making an uproar falls in loading initiative.

Background

With the rapid development of economy in China, high-speed rail traveling becomes an important transportation mode for people to go out, and the riding comfort of passengers becomes an important concern. The noise level during driving is an important index for measuring the riding comfort. Therefore, the control of high-speed rail noise becomes a hot spot of technical research on high-speed railway motor train units. The research of the active noise reduction technology in China starts in the nineties of the last century and is mainly concentrated in scientific research institutions such as national college research institute and the like and the military industry field. A large amount of research work is done by domestic scientific research institutions, and military industry application mainly focuses on active vibration isolation and active noise reduction in the fields of ships and warships and aerospace. Generally speaking, the active noise reduction technology in China is still in the research and exploration stage, and mature products are hardly seen in the market and are applied and popularized on a large scale.

The existing noise reduction technology generally uses a sound absorption structure and a sound absorption material to realize passive noise reduction, high-frequency noise can be reduced, but low-frequency noise cannot be reduced, and active noise reduction can effectively reduce low-frequency noise.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems that the passive noise reduction is realized by generally using a sound absorption structure and a sound absorption material in the prior noise reduction technology, the high-frequency noise can be reduced, but the low-frequency noise cannot be reduced, and the low-frequency noise can be effectively reduced by actively reducing the noise. The problems mentioned in the background art are solved.

The utility model provides a following technical scheme: a rail transit seat structure loaded with an active noise reduction module is provided with a reference microphone, an error sound transmission device and a loudspeaker; be provided with the controller of making an uproar falls in initiative that is connected with reference microphone, error microphone and speaker electricity respectively on the seat, the module of making an uproar falls in the initiative includes speaker subassembly one set, four sets of speaker subassemblies at most, speaker subassembly and the inside fixed mounting structure of seat skeleton or headrest, the speaker subassembly can be installed in seat head both sides, also can install in seat back, but even head back hold concurrently, or inside the headrest, seat surface or inside respectively fixed mounting have one or more reference microphone, the inside or the fixed surface of seat install the controlgear of making an uproar falls in the initiative.

A rail transit seat structure loaded with active noise reduction modules, comprising the process of:

step 1: indoor noise is converted into an analog noise signal through a microphone, and the analog noise signal is converted into a digital noise signal through an analog-to-digital conversion module;

step 2: the digital noise signal is processed by an adaptive filter module to generate a secondary digital sound source signal;

and step 3: the secondary digital sound source signal generates a secondary amplified digital sound source signal through a signal gain module;

and 4, step 4: the secondary amplified digital sound source signal is converted into a secondary amplified analog sound source signal through a digital-to-analog conversion module, and a secondary amplified sound source with the phase opposite to that of the indoor noise is output through a loudspeaker; the secondary amplified sound source cancels the indoor noise.

Preferably, the both sides of seat skeleton fixed mounting respectively have the handrail, the top of seat skeleton is equipped with the seat sponge, the top fixed mounting of seat sponge has the sound headrest of inhaling.

Preferably, the loudspeaker assembly comprises a loudspeaker, an error microphone and a loudspeaker cavity, and a silence interval can be formed near the human ear between the loudspeaker assemblies.

Preferably, the reference microphone can be wrapped inside the seat sponge, at least one reference microphone is arranged and the placement position of the reference microphone is adjustable, and the reference microphone collects surrounding noise and transmits the noise to the active noise reduction control device.

Preferably, the active noise reduction control device is provided with an active noise reduction core control device.

Preferably, the seat frame comprises a mounting base and an angle adjusting mechanism.

Preferably, the seat sponge is wrapped on the seat frame and the armrest handle.

Preferably, the front surface of the sound-absorbing headrest is provided with a sound-absorbing hole.

Compared with the prior art, the utility model discloses possess following beneficial effect:

the utility model discloses a speaker subassembly, reference microphone and the initiative controlgear of making an uproar that falls, speaker subassembly is including speaker, error microphone and the cavity of raising one's voice simultaneously, and the initiative is fallen the noise core control device of making an uproar that falls and is equipped with on the controlgear of making an uproar that falls, has realized falling the initiative on high-speed railway one grade of seat and has fallen the noise of making an uproar, mainly improves the noise in low frequency region to promote the comfort level that the passenger took, improved the rationality and the feasibility of device.

Drawings

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

fig. 2 is a schematic side view of the structure of the present invention.

In the figure: 1. a speaker assembly; 2. a reference microphone; 3. an active noise reduction control device; 4. a seat frame; 5. a handle bar; 6. a seat sponge; 7. sound absorption headrest.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a rail transit seat structure loaded with an active noise reduction module is provided with a reference microphone, an error microphone and a speaker; the seat is provided with an active noise reduction controller which is respectively electrically connected with a reference microphone, an error microphone and a loudspeaker, an active noise reduction module comprises a loudspeaker assembly 1, a silent section can be formed near the ears of a person through the loudspeaker assembly 1, the active noise reduction module realizes active noise reduction on a high-speed rail seat and the like, mainly improves the noise in a low-frequency area, thereby improving the comfort level of passengers, and improving the rationality and feasibility of the device, at most four loudspeaker assemblies 1, the loudspeaker assemblies 1 and a seat framework 4 or a fixed mounting structure in a headrest, the seat framework 4 comprises a mounting base and an adjusting mechanism, the bottom of the seat has a larger space, so that the seat can be stably mounted on traffic equipment, and meanwhile, the adjusting mechanism can adjust the sitting posture, thereby improving the practicability of the device, the two sides of the seat framework 4 are respectively fixedly provided with the armrest handles 5, the seat sponge 6 is arranged above the seat framework 4 and is wrapped on the seat framework 4 and the armrest handles 5 through the seat sponge 6, so that the comfort level of a passenger is ensured, meanwhile, the sponge has certain sound absorption characteristics and is higher in comfort level, the feasibility of the device is improved, the top of the seat sponge 6 is fixedly provided with the sound absorption headrest 7, the sound absorption hole is formed in the front of the sound absorption headrest 7, the sound absorption effect at the head of the human body is improved, the frequency of sound passing is effectively reduced, the comfort level of riding is improved, the rationality and the feasibility of the device are improved, a better noise reduction environment can be built through arranging other components, meanwhile, the whole seat is improved to a certain extent, the rationality of the device is improved, the loudspeaker components 1 can be arranged on the two sides of the head of the seat, the active noise reduction control device can be arranged on the back of a seat, even the head and the back of the seat can be placed simultaneously, or the inside of a headrest is arranged, one or more reference microphones 2 are respectively and fixedly arranged on the surface of the seat or on the inner part of a seat 4, the reference microphones 2 can be wrapped in a seat sponge 6, at least one reference microphone 2 is arranged and the placement position of the reference microphone 2 can be adjusted, the reference microphones 2 collect surrounding noise and transmit the surrounding noise to the active noise reduction control device 3, so that the reference microphones 2 can be well integrated into the seat while having an active noise reduction function, the original framework cannot be influenced, the rationality and the feasibility of the device are improved, the active noise reduction control device 3 is fixedly arranged in the seat or on the surface, and the active noise reduction core control device is arranged on the active noise reduction control device 3, so that the active noise reduction on seats such as high-speed rails, thereby improving the comfort level of passengers and improving the rationality and feasibility of the device.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Simultaneously in the utility model discloses an in the drawing, fill the pattern and just do not do any other injecions for distinguishing the picture layer.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A rail transit seat structure loaded with an active noise reduction module is provided with a reference microphone, an error sound transmission device and a loudspeaker; be provided with the controller of making an uproar of falling initiatively that is connected with reference microphone, error microphone and speaker electricity respectively on the seat, the module of making an uproar of falling initiatively includes one set at least speaker subassembly (1), installs in seat head both sides to and in the seat back structure, the module of making an uproar of falling initiatively still contains one or more reference microphone (2) and installs inside the seat, the inside or the fixed surface of seat install initiatively and fall the controlgear (3) of making an uproar.

2. The rail transit seat structure loaded with active noise reduction modules of claim 1, wherein: both sides of seat skeleton (4) are fixed mounting respectively have handrail (5), seat skeleton (4) steel sheet surface paste has sponge (6), the top fixed mounting of seat sponge (6) has sound headrest (7) of inhaling.

3. The rail transit seat structure loaded with active noise reduction modules of claim 1, wherein: the loudspeaker assembly (1) comprises a loudspeaker, an error microphone and a loudspeaker cavity, and a mute section can be formed between the loudspeaker assemblies (1) near human ears.

4. The rail transit seat structure loaded with active noise reduction modules of claim 1, wherein: the reference microphone (2) is fixed in the seat sponge (6) structure, the structure is provided with at least one reference microphone (2), the reference microphone (2) is installed and fixed at any position of the seat sponge (6), the reference microphone (2) collects noise around the seat, and the noise is transmitted to the active noise reduction control device (3).

5. The rail transit seat structure loaded with active noise reduction modules of claim 1, wherein: the active noise reduction control equipment (3) comprises a core digital signal processing chip, a PCB circuit board and an auxiliary electroacoustic device capable of ensuring normal receiving and sending of system signals.

6. The rail transit seat structure loaded with active noise reduction modules of claim 2, wherein: and sponge (6) is stuck on the surface of the steel plate of the seat framework (4).

7. The rail transit seat structure loaded with active noise reduction modules of claim 2, wherein: the head leaning side of the sound-absorbing headrest (7) is provided with a sound-absorbing hole.