A sound absorbing device capable of automatically adjusting the sound absorbing angle locally

Abstract

The present invention belongs to the technical field of sound monitoring and absorption, and solves the problem that the existing sound-absorbing panels cannot automatically adjust the sound absorption angle according to the sound volume. A sound-absorbing device that can automatically adjust the sound absorption angle locally is provided, including a sound-absorbing panel and a controller. The sound-absorbing panel is arranged on a concrete plate and a rotation gap is left therewith. A noise sensor is arranged on the sound-absorbing panel. An axis frame and a motor are fixed on the concrete plate. The noise sensor and the motor are both connected to the controller. The sound-absorbing panel includes a movable plate and a fixed plate. A swing arm is fixed on the movable plate. The swing arm is rotatably connected to the axis frame through a rotating shaft. A torsion spring is arranged on the rotating shaft. A retractable device for controlling the rotation of the swing arm is arranged between the motor and the swing arm. The present invention detects the decibel value of the sound by arranging a noise sensor, and transmits the detection result to the controller. The controller controls the forward and reverse rotation of the motor, pulls the swing arm to drive the sound-absorbing panel to rotate, and realizes the function of automatically adjusting the sound absorption effect.

Description

Technical Field

[0001] The invention belongs to the technical field of sound monitoring and absorption, and in particular relates to a sound absorbing device capable of partially and automatically adjusting a sound absorbing angle. Background Art

[0002] Generally speaking, equalizers and feedback suppressors are installed in large conference rooms to adjust the sound system. However, after the sound is broadcast, due to the lack of monitoring and control of the sound quality in the entire space, some noise pollution often occurs on site.

[0003] Usually, sound-absorbing panels are installed on the walls of conference rooms to reduce noise. Existing micro-perforated sound-absorbing panels are panels that use sound-absorbing holes on a panel with a cavity to absorb and reduce noise. They are mainly used in urban scenes such as concert halls, museums, and conference rooms. General micro-perforated sound-absorbing panels generally have the problem that the sound-absorbing band is not easy to adjust and the sound-absorbing effect is not improved.

[0004] Most of the existing sound-absorbing panels are fixedly installed, but different venues require different decibels, and the voices of different speakers in the meeting are also different. Fixed sound-absorbing panels cannot automatically adjust the sound absorption angle according to the sound volume coming from the loudspeaker, and there are certain limitations.

[0005] Therefore, a sound absorbing device that can automatically adjust the sound absorbing angle locally needs to be studied urgently. Summary of the invention

[0006] In view of the deficiency that the existing sound-absorbing panels cannot automatically adjust the sound-absorbing angle according to the sound volume, the purpose of the present invention is to provide a sound-absorbing device that can automatically adjust the sound-absorbing angle locally. By setting a noise sensor, the decibel value of the sound is detected, and the detection result is transmitted to the controller. The controller controls the forward and reverse rotation of the motor, pulls the swing arm to drive the sound-absorbing panel to rotate, and realizes the function of automatically adjusting the sound-absorbing effect.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a sound absorbing device capable of partially and automatically adjusting the sound absorption angle, comprising a sound absorbing panel and a controller placed indoors, the sound absorbing panel being arranged on a concrete slab and leaving a rotation gap therewith, a noise sensor being arranged on the sound absorbing panel, an axis frame and a motor being fixed on the concrete slab, the noise sensor and the motor being connected to the controller, the sound absorbing panel comprising a movable panel and a fixed panel, a swing arm being fixed on the movable panel, the swing arm being rotatably connected to the axis frame via a rotating shaft, a torsion spring being arranged on the rotating shaft, and a retracting and extending device for controlling the rotation of the swing arm being arranged between the motor and the swing arm.

[0008] Preferably, the retracting and unretracting device comprises a belt and a pulley mounted on the motor shaft, the pulley and the swing arm are tightened by the belt, one end of the belt is wound and fixed in the wheel groove of the pulley, and the other end is fixed to the side of the swing arm close to the concrete slab.

[0009] Preferably, a groove wheel is fixed to one end of the swing arm close to the concrete slab, and the belt is wound and fixed in the wheel groove of the groove wheel.

[0010] Preferably, the shaft frame includes two U-shaped frames arranged side by side, the open ends of the U-shaped frames are fixed on the concrete slab, the rotating shaft is vertically fixed between the two U-shaped frames, and the swing arm is rotatably connected to the rotating shaft.

[0011] Preferably, the torsion spring is sleeved on the rotating shaft between the swing arm and the shaft frame, one end of the torsion spring is fixed on the shaft frame, and the other end is fixed on the swing arm.

[0012] Preferably, the sound-absorbing panel comprises a perforated plate, a protective layer and a centrifugal glass wool plate which are adhesively fixed in sequence from the outside to the inside, and the perforated plate, the protective layer and the centrifugal glass wool plate are reinforced by bolts.

[0013] Preferably, the sound-absorbing panel is of three sections, with a movable panel in the middle, and fixed panels on both sides mounted on the concrete slab through keels, and a pad is provided between the movable panel and the swing arm.

[0014] Preferably, the contact surfaces of the movable plate and the fixed plate are arc-shaped surfaces that fit each other.

[0015] Compared with the prior art, the present invention provides a sound absorbing device that can automatically adjust the sound absorbing angle locally according to the sound volume, and has the following beneficial effects:

[0016] 1. This device detects the decibel value of the sound by setting a noise sensor and transmits the detection result to the controller. The controller controls the forward and reverse rotation of the motor, pulls the swing arm to drive the sound-absorbing panel to rotate, and realizes the function of automatically adjusting the sound-absorbing effect.

[0017] 2. The retracting and releasing device adopts the combination of pulley, belt and groove wheel, which reduces the wear of the belt during use and increases the service life of the device.

[0018] 3. The sound-absorbing panel of this device adopts a three-section structure. Compared with the overall rotation, the partial rotation has higher stability and more subtle adjustment.

[0019] 4. By setting a torsion spring, this device can ensure that the belt can be tightened and the swing arm can be adjusted to the correct position in a variety of installation environments.

[0020] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure installation of this embodiment;

[0023] Figure 2 This is a schematic diagram of the structure of the movable plate of this embodiment after rotation;

[0024] Figure 3 It is a schematic diagram of the structure of the retractable device and the swing arm of this embodiment.

[0025] In the figure: 1-sound absorbing board; 1.1-movable board; 1.2-fixed board; 2-noise sensor; 3-axle frame; 3.1-rotating shaft; 4-motor; 5-swing arm; 6-torsion spring; 7-controller; 8-belt; 9-pulley; 10-groove pulley; 11-perforated plate; 12-protective layer; 13-centrifugal glass wool board; 14-keel; 15-pad; 16-concrete board. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] The present invention provides an embodiment:

[0029] like Figure 1 , Figure 2As shown, a sound absorbing device capable of partially and automatically adjusting a sound absorbing angle comprises a sound absorbing panel 1 and a controller 7 placed indoors, the sound absorbing panel 1 being arranged on a concrete slab 16 of a wall and leaving a rotation gap therebetween, a noise sensor 2 being arranged on the sound absorbing panel 1, an axis frame 3 and a motor 4 being fixed on the concrete slab 16, the noise sensor 2 and the motor 4 being connected to the controller 7, the sound absorbing panel 1 comprising a movable panel 1.1 and a fixed panel 1.2, a swing arm 5 being fixed on the movable panel 1.1, the swing arm 5 being rotationally connected to the axis frame 3 via a rotating shaft 3.1, a torsion spring 6 being arranged on the rotating shaft 3.1, and a retracting and extending device for controlling the rotation of the swing arm 5 being arranged between the motor 4 and the swing arm 5.

[0030] like Figure 3 As shown, in this embodiment, the retracting and releasing device includes a belt 8 and a pulley 9 installed on the rotating shaft of the motor 4, the belt 8 is tightened between the pulley 9 and the swing arm 5, one end of the belt 8 is wound and fixed in the wheel groove of the pulley 9, and the other end is fixed to the side of the swing arm 5 close to the concrete slab 16, and a groove wheel 10 is fixed at the end of the swing arm 5 close to the concrete slab 16, and the groove wheel 10 cannot rotate. The belt 8 is wound and fixed in the wheel groove of the groove wheel 10, the belt 8 is wound several times in the pulley 9 and the groove wheel 10, the two ends of the belt 8 are fixed, and then tightened to ensure that the belt 8 is always in a tightened state when the motor rotates forward and reversely. The pulley 9, belt 8 and groove wheel 10 cooperate to reduce the wear of the belt 8 during use and increase the service life of the device.

[0031] The model of the noise sensor 2 is TZ-2KA, the controller 7 is an existing controller with programming function, and the control relationship between the noise sensor 2, the controller 7 and the motor 4 is all existing technology and will not be described in detail here.

[0032] Working principle: The noise sensor 2 receives the sound from the room and transmits the signal to the controller 7. The controller 7 analyzes the signal. According to the size of the sound, the controller 7 controls the motor 4 to rotate forward or reverse, driving the pulley 9 to retract and release the belt 8, thereby driving the swing arm 5 to rotate. The swing arm 5 drives the movable plate 1.1 of the sound-absorbing panel 1 to rotate to different angles, thereby adjusting the angle between the movable plate 1.1 and the loudspeaker to achieve the purpose of adjusting the sound absorption effect.

[0033] The shaft frame 3 includes two U-shaped frames arranged side by side, the open ends of the U-shaped frames are fixed on the concrete slab 16, the rotating shaft 3.1 is vertically fixed between the two U-shaped frames, and the swing arm 5 is rotatably connected to the rotating shaft 3.1. In this embodiment, there are two torsion springs 6, which are sleeved on the rotating shaft 3.1 between the swing arm 5 and the shaft frame 3. One end of the torsion spring 6 is fixed on the shaft frame 3, and the other end is fixed on the swing arm 5. During the rotation of the swing arm 5, the torsion spring 6 applies a rotational force to the swing arm 5, and cooperates with the motor 4 to keep the belt 8 in a taut state at all times, and the phenomenon of the sound absorbing panel 1 being unable to rotate due to belt slack will not occur.

[0034] In this embodiment, the sound-absorbing panel 1 is a three-section type, with a movable panel 1.1 in the middle, and fixed panels 1.2 on both sides are installed on a concrete slab 16 through keels 14. A pad 15 is provided between the movable panel 1.1 and the swing arm 5. The contact surface between the movable panel 1.1 and the fixed panel 1.2 is an arc-shaped surface that fits each other, which facilitates the rotation of the movable panel 1.1. Compared with the overall rotation, the local rotation has higher stability and more subtle adjustment.

[0035] The sound-absorbing panel 1 includes a perforated plate 11, a protective layer 12 and a centrifugal glass wool board 13 which are bonded and fixed in sequence from the outside to the inside. The perforated plate 11, the protective layer 12 and the centrifugal glass wool board 13 are reinforced by bolts. The porosity and size of the perforated plate 11 can be adjusted to enhance the sound absorption effect. The centrifugal glass wool board 13 can increase the low-frequency sound absorption and reduce the medium and high-frequency sound absorption. In order to prevent external dust from entering the centrifugal glass wool board 13 through the perforated plate holes 11 and clogging the pores, and also to prevent the fibers of the centrifugal glass wool board 13 from being scattered into the outside and causing environmental pollution, a protective layer 12 is added between the perforated plate 11 and the centrifugal glass wool board 13. Commonly used protective materials are non-woven fabrics, glass fiber cloth and sound-permeable fabrics.

[0036] During specific installation, the sound absorbing panel 1 should be installed near the loudspeaker. The installation angle should be selected according to the on-site conditions so that the movable panel 1.1 can face the loudspeaker after rotation. According to the volume of the sound in the loudspeaker, the angle between the two is adjusted to achieve the best auditory effect. Among them, when the movable panel 1.1 faces the loudspeaker, the sound absorption effect is the strongest.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sound absorbing device that can automatically adjust the sound absorbing angle locally. Features: The invention comprises a sound absorbing panel (1) and a controller (7) placed indoors, wherein the sound absorbing panel (1) is arranged on a concrete slab and has a rotation gap therebetween, a noise sensor (2) is arranged on the sound absorbing panel (1), a shaft frame (3) and a motor (4) are fixed on the concrete slab, the noise sensor (2) and the motor (4) are both connected to the controller (7), the sound absorbing panel (1) comprises a movable panel (1.1) and a fixed panel (1.2), a swing arm (5) is fixed on the movable panel (1.1), the swing arm (5) is rotationally connected to the shaft frame (3) via a rotating shaft (3.1), a torsion spring (6) is arranged on the rotating shaft (3.1), and a retractable device for controlling the rotation of the swing arm (5) is arranged between the motor (4) and the swing arm (5); The sound absorbing panel (1) is of three-section type, with a movable panel (1.1) in the middle, and fixed panels (1.2) on both sides mounted on a concrete slab via keels (14), and a pad (15) is provided between the movable panel (1.1) and the swing arm (5); The retractable device comprises a belt (8) and a pulley (9) mounted on the rotating shaft of the motor (4); the pulley (9) and the swing arm (5) are tightened by the belt (8); one end of the belt (8) is wound and fixed in the wheel groove of the pulley (9), and the other end is fixed to a side of the swing arm (5) close to the concrete slab.

2. A sound absorbing device capable of partially and automatically adjusting the sound absorbing angle according to claim 1, Features: A groove wheel (10) is fixed to one end of the swing arm (5) close to the concrete slab, and the belt (8) is wound and fixed in the wheel groove of the groove wheel (10).

3. A sound absorbing device capable of partially and automatically adjusting the sound absorbing angle according to claim 2, Features: The shaft frame (3) comprises two U-shaped frames arranged side by side, the open ends of the U-shaped frames are fixed on the concrete slab, the rotating shaft (3.1) is vertically fixed between the two U-shaped frames, and the swing arm (5) is rotatably connected to the rotating shaft (3.1).

4. A sound absorbing device capable of partially and automatically adjusting the sound absorbing angle according to claim 3, Features: The torsion spring (6) is sleeved on the rotating shaft (3.1) between the swing arm (5) and the shaft frame (3); one end of the torsion spring (6) is fixed on the shaft frame (3), and the other end is fixed on the swing arm (5).

5. A sound absorbing device capable of partially and automatically adjusting the sound absorbing angle according to claim 1, Features: The sound absorbing panel (1) comprises a perforated plate (11), a protective layer (12) and a centrifugal glass wool plate (13) which are bonded and fixed in sequence from the outside to the inside, and the perforated plate (11), the protective layer (12) and the centrifugal glass wool plate (13) are reinforced by bolts.

6. A sound absorbing device capable of partially and automatically adjusting the sound absorbing angle according to claim 1, Features: The contact surfaces of the movable plate (1.1) and the fixed plate (1.2) are arc-shaped surfaces that fit each other.

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