Active noise control device

Abstract

The utility model relates to the technical field of noise control, and discloses an active noise control device which comprises a vertical plate, a lifting plate is vertically installed on the vertical plate in a sliding mode towards the outer side, a transverse connecting strip is welded to the middle of the end, close to the vertical plate, of the lifting plate, and a lifting rope is fixed to the top of the transverse connecting strip. A rotating assembly is installed in the middle of the end, away from the vertical plate, of the lifting plate, telescopic rods capable of stretching and retracting transversely are installed at the two rotating ends of the rotating assembly correspondingly, and control ends are installed at the opposite ends of the two telescopic rods correspondingly. According to the active noise control device, under the meshing transmission action of the second gear and the rack, the rack is driven to move transversely, when the rack moves transversely, the distance between the transverse bin and the translation strip is adjusted, and the transverse position of the control end is adjusted; the device is used for expanding the de-noising range of a control end on a transverse coordinate, expanding the active noise de-noising area of the whole device, and reducing the use cost.

Description

Technical Field

[0001] The utility model relates to the technical field of noise control, in particular to an active noise control device. Background Art

[0002] Active noise controller is a technology that actively generates a sound field through an external sound source and superimposes it with the existing noise field to achieve noise reduction in the target area. Its principle is based on real-time monitoring of noise and generating sound waves (secondary sound waves) opposite to the noise to offset the original noise signal (primary sound wave) to achieve the purpose of noise reduction. Specifically, the microphone continuously monitors the noise signal in the environment and converts it into an electrical signal. The processor quickly analyzes and processes the received electrical signal to determine the frequency, phase, amplitude and other characteristics of the noise. Based on the result of signal processing, the processor generates a reverse sound wave signal with a phase opposite to the original noise and a similar amplitude, and sends it out through the speaker. When the reverse sound wave meets the original noise in space, due to their opposite phases, destructive interference will occur, resulting in the cancellation of sound energy, thereby reducing the sound level of the noise. Excessive noise can cause great harm to people's physical and mental health, mainly manifested in damage to the hearing system and nervous system, and can also cause personnel to be distracted, posing certain safety hazards.

[0003] Prior art, such as announcement number: CN209266014U discloses an active noise control device, including a hollow guide rail fixed on the wall of a residential building and a motor fixed on the wall of the residential building, characterized in that it also includes a noise controller driven up and down by a lifting belt and a wire protection chain fixed on the wall of the residential building, and the motor is arranged above the hollow guide rail; the utility model has a simple structure and can effectively reduce low-frequency noise.

[0004] With respect to the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: during operation, the controller can be driven to rise and fall vertically to increase the longitudinal noise reduction area of ​​the control device. In terms of the lateral area, multiple groups of control devices are installed to achieve large-area noise reduction coverage. Although this method is feasible, the use cost and maintenance cost are high, which is not conducive to promotion. Utility Model Content

[0005] In view of the above-mentioned existing controller that can be driven to perform vertical lifting and lowering, so as to increase the longitudinal noise reduction area of ​​the control device, in terms of the lateral area, it adopts the installation of multiple groups of control devices to achieve large-area noise reduction coverage. Although this method is feasible, the use cost and maintenance cost are high, which is not conducive to promotion. Therefore, the present utility model is proposed.

[0006] Therefore, the utility model aims to provide an active noise control device, the purpose of which is to expand the lateral noise reduction range of the device.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: an active noise control device, comprising a vertical plate, a lifting plate is installed on the vertical plate in a vertical sliding direction toward the outside, a horizontal connecting bar is welded to the middle of the lifting plate near one end of the vertical plate, and a suspension rope is fixed to the top of the horizontal connecting bar;

[0008] A rotating assembly is installed at the middle of one end of the lifting plate away from the vertical plate, and both rotating ends of the rotating assembly are installed with telescopic rods that can be telescoped laterally, and the opposite ends of the two telescopic rods are installed with control ends.

[0009] As a preferred solution of the active noise control device described in the utility model, guide rails are installed on both sides of the vertical plate facing outwards, and sliding blocks sliding on the guide rails are installed on both sides of the lifting plate close to one end of the vertical plate.

[0010] As a preferred solution of the active noise control device described in the utility model, the control end includes a side convex strip, a microphone is installed in the middle of the side convex strip near the vertical plate, two secondary speakers are installed at the end of the side convex strip near the vertical plate, the end of the side convex strip away from the microphone is fixed with a casing, and a noise controller and a power supply are installed inside the casing.

[0011] As a preferred solution of the active noise control device described in the utility model, the telescopic rod includes a transverse warehouse, a rack is arranged inside the transverse warehouse, a translation bar is fixed to the end of the rack away from the transverse warehouse, a driving motor is installed on the end of the transverse warehouse close to the translation bar, and a driving end of the driving motor is installed with a gear 2 meshing with the rack.

[0012] As a preferred solution of the active noise control device described in the utility model, T-rails are installed on the top and bottom of the inner wall of the transverse bin, a T-shaped slider is slidably installed on the T-rail, and the end of the T-shaped slider away from the transverse bin is fixedly connected to the translation bar.

[0013] As a preferred solution of the active noise control device described in the utility model, the rotating assembly includes two rotating shafts rotatably installed on the front side of the lifting plate through bearings, the outer wall of the rotating shaft is sleeved with a rotating block, and the transverse bin is fixed to the planar side end of the rotating block.

[0014] As a preferred solution of the active noise control device described in the utility model, the rotating assembly also includes a servo motor fixed to the middle part of the front side of the lifting plate, a belt transmission assembly is installed between the driving end of the servo motor and a rotating shaft, a gear is sleeved on the front end of the rotating shaft, and the gears on both sides are meshed with each other.

[0015] Beneficial effects of the utility model:

[0016] 1. In the utility model, when the lifting plate is lifted or lowered, the sliding block slides on the guide rail to ensure that the lifting plate can only be lifted or lowered vertically along the guide of the guide rail, so as to ensure that the lifting plate can only be lifted or lowered vertically, thereby ensuring the stability of the vertical lifting of the control end and making the device run more smoothly.

[0017] 2. The utility model drives the rack to move laterally under the meshing transmission action of the gear 2 and the rack. When the rack moves laterally, the spacing between the transverse bin and the translation bar is adjusted, and the transverse position of the control end is adjusted, which is used to expand the range of noise cancellation of the control end on the transverse coordinate, expand the area where the device as a whole can perform active noise cancellation, and reduce the cost of use.

[0018] 3. The utility model, under the traditional action of two gears meshing with each other, realizes that a servo motor drives two rotating shafts to rotate at the same time, which reduces the manufacturing and use costs on the one hand, and can adjust the position of the control end laterally on the other hand. When the control end rotates, the lateral position of the control end can be gradually adjusted outward or inward, further expanding the area where the control end can eliminate noise and improving the noise elimination effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 The utility model is a schematic diagram of the overall structure of an active noise control device.

[0021] Figure 2 The utility model is a rear structural schematic diagram of a lifting plate of an active noise control device.

[0022] Figure 3 The utility model is a schematic structural diagram of a rotating assembly and a telescopic rod of an active noise control device.

[0023] Figure 4The utility model is a schematic structural diagram of a telescopic rod of an active noise control device.

[0024] Figure 5 The utility model is a schematic diagram of the structure of a control end of an active noise control device.

[0025] Description of reference numerals:

[0026] 1. Vertical plate; 11. Lifting plate; 12. Guide rail; 13. Horizontal connecting bar; 14. Sliding block; 2. Lifting rope; 3. Rotating assembly; 31. Servo motor; 32. Belt transmission assembly; 33. Rotating shaft; 34. Gear 1; 4. Telescopic rod; 41. Rotating block; 42. Horizontal bin; 43. Gear 2; 44. Rack; 45. Translation bar; 46. T-shaped slider; 47. Driving motor; 48. T-shaped rail; 5. Control terminal; 51. Side convex strip; 52. Housing; 53. Secondary speaker; 54. Microphone. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Example

[0028] Reference Figure 1-5 , which is the first embodiment of the utility model, provides an active noise control device, which includes a vertical plate 1, a lifting plate 11 is vertically slidably installed on the vertical plate 1 toward the outside, a horizontal connecting bar 13 is welded to the middle of the lifting plate 11 near one end of the vertical plate 1, a suspension rope 2 is fixed to the top of the horizontal connecting bar 13, and the suspension rope 2 is rolled up by an electric hoist, which is an existing mature technology;

[0029] A rotating assembly 3 is installed in the middle of one end of the lifting plate 11 away from the vertical plate 1 , and both rotating ends of the rotating assembly 3 are installed with telescopic rods 4 that can be telescoped laterally, and control ends 5 are installed at the opposite ends of the two telescopic rods 4 .

[0030] Guide rails 12 are installed on both sides of the vertical plate 1 facing outwards, and sliding blocks 14 sliding on the guide rails 12 are installed on both sides of the lifting plate 11 close to one end of the vertical plate 1. When the lifting plate 11 is lifted, the sliding block 14 slides on the guide rails 12 to ensure that the lifting plate 11 can only be lifted vertically along the guidance of the guide rails 12, so as to ensure that the lifting plate 11 can only be lifted vertically, thereby ensuring the stability of the vertical lifting of the control end 5 and making the device run more smoothly.

[0031] The control end 5 includes a side convex strip 51, a microphone 54 is installed in the middle of the side convex strip 51 near the vertical plate 1, two secondary speakers 53 are installed at the end of the side convex strip 51 near the vertical plate 1, and the microphone 54 is located between the two secondary speakers 53, and a housing 52 is fixed to the end of the side convex strip 51 away from the microphone 54, and a noise controller and a power supply are installed inside the housing 52. The secondary speaker 53, the microphone 54 and the noise controller are all existing mature technologies, so they are not described in detail. The microphone 54 obtains the original ambient noise signal that needs to be controlled in the environment and transmits it to the noise controller. The noise controller generates a control signal and drives the secondary speaker 53 to send out an anti-noise signal to achieve local active noise control near the target noise reduction point.

[0032] The telescopic rod 4 includes a transverse bin 42, a rack 44 is arranged inside the transverse bin 42, a translation bar 45 is fixed to the end of the rack 44 away from the transverse bin 42, a driving motor 47 is installed on the end of the transverse bin 42 close to the translation bar 45, and the driving end of the driving motor 47 is located inside the transverse bin 42, and a gear 2 43 meshing with the rack 44 is installed on the driving end of the driving motor 47. When the rack 44 moves laterally, the distance between the transverse bin 42 and the translation bar 45 is adjusted, and the lateral position of the control end 5 is adjusted, so as to expand the range of noise cancellation of the control end 5 on the transverse coordinate, expand the area where the device as a whole can perform active noise cancellation, and reduce the cost of use.

[0033] T-rails 48 are installed on the top and bottom of the inner wall of the transverse bin 42, and the rack 44 is fixed at the top of the T-slider 46 below. The T-slider 46 is slidably installed on the T-rail 48, and the end of the T-slider 46 away from the transverse bin 42 is fixedly connected to the translation bar 45.

[0034] During use, the vertical plate 1 is fixed on the bridge deck, and the electric hoist is used to reel in the lifting rope 2 to achieve the lifting and lowering of the lifting plate 11, so as to adjust the longitudinal height of the control end 5;

[0035] The drive motor 47 drives the gear 2 43 to rotate, and the gear 2 43 and the rack 44 are meshed and driven to move the rack 44 laterally. When the rack 44 moves laterally, the spacing between the transverse bin 42 and the translation bar 45 is adjusted, and the transverse position of the control terminal 5 is adjusted, so as to expand the noise elimination range of the control terminal 5 on the transverse coordinate. Example

[0036] Reference Figure 1-5 , which is the second embodiment of the utility model, and this embodiment is different from the first embodiment in that:

[0037] The rotating assembly 3 includes two rotating shafts 33 rotatably mounted on the front side of the lifting plate 11 through bearings. The outer wall of the rotating shaft 33 is sleeved with a rotating block 41 , and the transverse bin 42 is fixed to the plane side end of the rotating block 41 .

[0038] The rotating assembly 3 also includes a servo motor 31 fixed to the middle of the front side of the lifting plate 11, and a belt transmission assembly 32 is installed between the driving end of the servo motor 31 and a rotating shaft 33. The belt transmission assembly 32 is an existing mature technology, so it is not described in detail. The front end of the rotating shaft 33 is covered with a gear 34, and the gears 34 on both sides are meshed.

[0039] The servo motor 31 drives one side rotating shaft 33 to rotate through the belt transmission component 32. Under the traditional action of the two gears 34 meshing with each other, one servo motor 31 can simultaneously drive the two rotating shafts 33 to rotate, which can reduce the manufacturing and use costs on the one hand, and on the other hand, the position of the control end 5 can be adjusted laterally. When the control end 5 rotates, the lateral position of the control end 5 can be gradually adjusted outward or inward, further expanding the area where the control end 5 can eliminate noise and improving the noise elimination effect.

[0040] During use, when the lifting plate 11 is suspended at a certain height, the telescopic rod 4 is telescopically driven to drive the control end 5 to move laterally. At the same time, the servo motor 31 drives one side of the rotating shaft 33 to rotate through the belt transmission assembly 32. Under the traditional action of the two gears 34 meshing, one servo motor 31 can simultaneously drive the two rotating shafts 33 to rotate.

[0041] The remaining structures are the same as those of Example 1.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An active noise control device, comprising a vertical plate (1), characterized in that: A lifting plate (11) is mounted on the vertical plate (1) in a vertically sliding manner toward the outside, a horizontal connecting bar (13) is welded to the middle of the lifting plate (11) near one end of the vertical plate (1), and a suspension rope (2) is fixed to the top of the horizontal connecting bar (13); A rotating assembly (3) is installed at the middle of one end of the lifting plate (11) away from the vertical plate (1), and both rotating ends of the rotating assembly (3) are installed with telescopic rods (4) that can be laterally extended and retracted, and control ends (5) are installed at the opposite ends of the two telescopic rods (4).

2. An active noise control device according to claim 1, characterized in that: Guide rails (12) are installed on both sides of the vertical plate (1) facing outwards, and sliding blocks (14) that slide on the guide rails (12) are installed on both sides of the lifting plate (11) close to one end of the vertical plate (1).

3. An active noise control device according to claim 2, characterized in that: The control end (5) comprises a side convex strip (51), a microphone (54) is installed in the middle of one end of the side convex strip (51) close to the vertical plate (1), two secondary speakers (53) are installed at one end of the side convex strip (51) close to the vertical plate (1), a housing (52) is fixed to one end of the side convex strip (51) away from the microphone (54), and a noise controller and a power supply are installed inside the housing (52).

4. An active noise control device according to claim 3, characterized in that: The telescopic rod (4) comprises a transverse bin (42), a rack (44) is arranged inside the transverse bin (42), a translation bar (45) is fixed to one end of the rack (44) away from the transverse bin (42), a drive motor (47) is mounted on one end of the transverse bin (42) close to the translation bar (45), and a second gear (43) meshing with the rack (44) is mounted on the drive end of the drive motor (47).

5. An active noise control device according to claim 4, characterized in that: T-shaped rails (48) are installed on the top and bottom of the inner wall of the transverse bin (42), a T-shaped slider (46) is slidably installed on the T-shaped rail (48), and one end of the T-shaped slider (46) away from the transverse bin (42) is fixedly connected to the translation bar (45).

6. An active noise control device according to claim 5, characterized in that: The rotating assembly (3) comprises two rotating shafts (33) rotatably mounted on the front side of the lifting plate (11) via bearings, a rotating block (41) is sleeved on the outer wall of the rotating shaft (33), and a transverse bin (42) is fixed to the plane side end of the rotating block (41).

7. An active noise control device according to claim 6, characterized in that: The rotating assembly (3) further comprises a servo motor (31) fixed to the middle of the front side of the lifting plate (11), a belt transmission assembly (32) being installed between the driving end of the servo motor (31) and a rotating shaft (33), a gear one (34) being sleeved on the front end of the rotating shaft (33), and the gears one (34) on both sides are meshed with each other.

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