Anti-interference noise detection equipment
By introducing PZT piezoelectric ceramic film self-cleaning components and vibration damping components into the noise detection equipment, the problem of sensitivity attenuation caused by equipment contamination and vibration was solved, achieving efficient cleaning and stable operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI TIN TESTING TECHNOLOGY CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-14
AI Technical Summary
Environmental noise detection equipment is susceptible to particulate matter pollution and vibration in industrial settings, which can lead to decreased sensitivity and reduced monitoring effectiveness.
The self-cleaning component is composed of PZT piezoelectric ceramic film and flexible conductive silver paste, combined with porous metal mesh and silicone sealing ring. The housing contains shock-absorbing components, dust cover and diaphragm design to prevent particulate matter from adhering and absorb vibration energy.
It effectively prevents contamination of the sound transmission unit, maintains equipment sensitivity, reduces maintenance costs, reduces noise, and improves monitoring quality.
Smart Images
Figure CN224122040U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of noise detection, and in particular to an anti-interference noise detection device. Background Technology
[0002] A noise sampling device for environmental noise detection is a specialized device used to acquire environmental noise data for analysis and evaluation. The noise sampling device mainly consists of several parts, including a noise sensor, a data logger, data analysis and display, an interface and communication system, and a power supply.
[0003] Currently, when environmental noise detection equipment is used in practical applications, particulate matter in industrial settings easily adheres to the surface of the microphone diaphragm, leading to a decrease in sensitivity. Furthermore, most noise detection devices are prone to loosening when subjected to vibration or collision under the influence of external environment (such as wind, mechanical movement, etc.). Some devices may become misaligned under the influence of large vibration amplitude or long-term vibration, thereby reducing the quality of the collected noise audio and ultimately affecting the actual monitoring effect. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides an anti-interference noise detection device.
[0005] The noise detection device for interference resistance provided by this utility model adopts the following technical solution:
[0006] An anti-interference noise detection device includes a housing, an inner housing, and a sound transmission unit. The inner housing is disposed inside the housing. The sound transmission unit includes a dust cover, a diaphragm, a preamplifier, a filter, a digital signal processing unit, and a controller. The surface of the housing has a plurality of annular array sound transmission holes. The dust cover is disposed on the housing. The diaphragm and the preamplifier are disposed within the sound transmission holes. A self-cleaning component is disposed between the diaphragm and the dust cover. The self-cleaning component includes a PZT piezoelectric ceramic film, a high-frequency driving circuit, and flexible conductive silver paste. The PZT piezoelectric ceramic film is disposed close to the dust cover. An interdigitated electrode array is deposited on the surface of the PZT piezoelectric ceramic film. The PZT piezoelectric ceramic film is connected to the high-frequency driving circuit through the flexible conductive silver paste.
[0007] Optionally, the dust cover is a porous metal mesh with a pore size of <0.5mm.
[0008] Optionally, a flexible silicone sealing ring is provided inside the sound transmission hole, and the PZT piezoelectric ceramic film is fixedly connected to the flexible silicone sealing ring.
[0009] Optionally, a shock-absorbing component is provided between the inner shell and the outer shell. The shock-absorbing component is specifically a silicone damping layer that fills the space between the inner shell and the outer shell.
[0010] Optionally, the silicone damping layer has a through hole, through which the preamplifier passes.
[0011] Optionally, the dust cover is detachably connected to the outer casing.
[0012] In summary, this utility model has at least one of the following beneficial technical effects:
[0013] 1. The outer casing is designed to withstand external impacts, protecting the internal sound transmission unit and electronic components. It also supports individual replacement of the outer casing, reducing maintenance costs. Furthermore, when the noise detection equipment is shut down, the high-frequency drive circuit outputs a high-frequency voltage to the PZT piezoelectric ceramic film. The PZT piezoelectric ceramic film converts electrical energy into mechanical vibration energy through the inverse piezoelectric effect. Periodic deformation occurs inside the PZT material, forming a high-frequency standing wave vibration perpendicular to the film surface. This dislodgings dust particles adhering to the dust cover surface. Regular cleaning keeps the dust cover clean and prevents the sensitivity of the detection equipment from decreasing.
[0014] 2. The dust cover is made of porous metal mesh with a pore size of <0.5mm. This can block dust particles with a diameter >5μm from entering the equipment and reduce the sensitivity reduction caused by diaphragm contamination.
[0015] 3. A flexible silicone sealing ring is installed inside the sound transmission hole. The PZT piezoelectric ceramic film is fixed to the flexible silicone sealing ring. The low elastic modulus of the flexible silicone can absorb the excess energy generated by the high-frequency vibration of the PZT film.
[0016] 4. A silicone damping layer is provided between the inner shell and the outer shell. The silicone damping layer fills the space between the inner shell and the outer shell. When strong winds or air currents blow against the equipment shell, the middle silicone layer acts like a "cushion" to absorb the shaking energy and reduce the vibration and noise of the internal parts. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of a noise detection device that is designed to resist interference.
[0018] Figure 2 This is a schematic diagram illustrating one side of a noise detection device designed to resist interference.
[0019] Figure 3 yes Figure 2 The front view.
[0020] Figure 4 yes Figure 3 A sectional view along line AA.
[0021] Figure 5 yes Figure 4 Enlarged view of point B in the middle.
[0022] Explanation of reference numerals in the attached drawings: 1. Outer shell; 2. Inner shell; 3. Sound transmission unit; 31. Dust cover; 32. Diaphragm; 33. Preamplifier; 34. Controller; 4. Sound transmission port; 5. Self-cleaning component; 51. PZT piezoelectric ceramic film; 52. High-frequency drive circuit; 53. Flexible silicone sealing ring; 6. Silicone damping layer. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0025] Furthermore, "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0026] This utility model discloses an anti-interference noise detection device. (Refer to...) Figure 1-5An anti-interference noise detection device includes a housing 1, an inner housing 2, and a sound transmission unit 3. The inner housing 2 is disposed inside the housing 1. The sound transmission unit 3 includes a dust cover 31, a diaphragm 32, a preamplifier 33, a filter, and a digital signal processing and controller 34. The surface of the housing 1 has several annular array sound transmission holes 4. The dust cover 31 is disposed on the housing 1. The diaphragm 32 and the preamplifier are disposed within the sound transmission holes 4. A self-cleaning component 5 is disposed between the diaphragm 32 and the dust cover 31. The self-cleaning component 5 includes a PZT piezoelectric ceramic film 51, a high-frequency driving circuit 52, and flexible conductive silver paste. The PZT piezoelectric ceramic film is disposed near the dust cover 31. The surface of the PZT piezoelectric ceramic film 51 is plated with interdigitated electrodes. The PZT piezoelectric ceramic film 51 is connected to the high-frequency drive circuit 52 via flexible conductive silver paste. This design allows the housing 1 to withstand external impacts first, protecting the internal sound transmission unit 3 and electronic components. It also allows for individual replacement of the housing 1, reducing maintenance costs. Furthermore, when the noise detection equipment is shut down, the high-frequency drive circuit 52 outputs a high-frequency voltage to the PZT piezoelectric ceramic film. The PZT piezoelectric ceramic film converts electrical energy into mechanical vibration energy through the inverse piezoelectric effect. Periodic deformation occurs inside the PZT material, forming a high-frequency standing wave vibration perpendicular to the film surface. This dislodgings dust particles adhering to the surface of the dust cover 31. Regular cleaning keeps the dust cover 31 clean and prevents the sensitivity of the detection equipment from decreasing.
[0027] The dust cover 31 is a porous metal mesh with a pore size of <0.5mm. This can block dust particles with a diameter >5μm from entering the equipment and reduce the sensitivity reduction problem caused by diaphragm 32 contamination.
[0028] A flexible silicone sealing ring 53 is provided inside the sound transmission hole 4. The PZT piezoelectric ceramic film is fixedly connected to the flexible silicone sealing ring 53. The low elastic modulus of the flexible silicone can absorb the excess energy generated by the high-frequency vibration of the PZT film.
[0029] A shock-absorbing component is provided between the inner shell 2 and the outer shell 1. Specifically, the shock-absorbing component is a silicone damping layer 6. The silicone damping layer 6 fills the space between the inner shell 2 and the outer shell 1. With this design, when strong winds or airflows blow onto the equipment shell, the middle silicone layer absorbs the shaking energy like a "cushion", reducing the vibration and noise of the internal parts.
[0030] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.
Claims
1. An interference-immune noise detection device, characterized by: The device includes an outer shell (1), an inner shell (2), and a sound transmission unit (3). The inner shell (2) is disposed inside the outer shell (1). The sound transmission unit (3) includes a dust cover (31), a diaphragm (32), a preamplifier (33), a filter, and a digital signal processing and controller (34). The outer shell (1) has several annular arrayed sound transmission holes (4) on its surface. The dust cover (31) is disposed on the outer shell (1), and the diaphragm (32) and the preamplifier are disposed in the sound transmission holes (4). 4) Inside, a self-cleaning component (5) is provided between the diaphragm (32) and the dust cover (31). The self-cleaning component (5) includes a PZT piezoelectric ceramic film (51), a high-frequency driving circuit (52), and flexible conductive silver paste. The PZT piezoelectric ceramic film is located close to the dust cover (31). An interdigitated electrode array is deposited on the surface of the PZT piezoelectric ceramic film (51). The PZT piezoelectric ceramic film (51) is connected to the high-frequency driving circuit (52) through the flexible conductive silver paste.
2. The anti-interference noise detection device according to claim 1, characterized in that: The dust cover (31) is a porous metal mesh with a pore size of <0.5mm.
3. The noise detection device for interference suppression according to claim 1, characterized in that: A flexible silicone sealing ring (53) is provided inside the sound transmission hole (4), and the PZT piezoelectric ceramic film is fixedly connected to the flexible silicone sealing ring (53).
4. The noise detection device for interference suppression according to claim 1, characterized in that: A shock-absorbing component is provided between the inner shell (2) and the outer shell (1). The shock-absorbing component is specifically a silicone damping layer (6), which fills the space between the inner shell (2) and the outer shell (1).
5. The noise detection device for interference suppression according to claim 4, characterized in that: The silicone damping layer (6) has a through hole, through which the preamplifier passes.
6. The noise detection device for interference suppression according to claim 1, characterized in that: The dust cover (31) is detachably connected to the outer shell (1).