Improved wind noise reduction device suitable for portable infrasound detection system

Abstract

The utility model discloses an improved wind noise reduction device suitable for a portable infrasound detection system, which relates to the technical field of infrasound detection, and comprises a collecting cavity, the collecting cavity is of a cylindrical structure, a cavity is arranged in the collecting cavity, seven pipe connectors are arranged on the outer surface of the collecting cavity, and the pipe connectors are connected with the collecting cavity. Wherein six pipe connectors are evenly distributed on the side face of the collecting cavity at equal intervals, the seventh pipe connector is arranged on the top face of the collecting cavity, and the seven pipe connectors are each of a hollow structure and communicate with the interior of the collecting cavity. The six pipe connectors on the side face of the collecting cavity are each detachably connected with a micro-air-pressure permeation pipe, and micron-sized fine holes are formed in the surface of each micro-air-pressure permeation pipe. According to the utility model, by replacing the material of the structural members, reducing the number of the structural members and optimizing the installation process, the device can be quickly unfolded and folded on the premise of keeping the wind noise reduction performance, is convenient to carry and store, and can meet the use requirements of the portable infrasound detection system.

Description

Technical Field

[0001] The utility model relates to the technical field of infrasound detection, in particular to an improved wind noise reduction device applicable to a portable infrasound detection system. Background Art

[0002] Infrasound waves are sound waves with a frequency lower than 20 Hz, having characteristics such as being easy to bypass obstacles, not easily attenuating, and having a long propagation distance. By using infrasound detection means, long-distance monitoring of natural disasters such as volcanic eruptions, typhoons, tsunamis, etc., and large-scale military events such as nuclear explosions, rocket launches, and missile landing points can be completed.

[0003] When conducting infrasound signal detection, an important influencing factor is background wind noise. The frequency of wind noise almost completely covers the infrasound frequency band, and the resulting atmospheric pressure changes interact with the infrasound signals propagating in the atmosphere. When the wind speed is relatively high, the infrasound signals are usually submerged in the wind noise, resulting in a decline in the detection ability of the infrasound detection system. The function of the wind noise reduction device is to cancel the wind noise and improve the detection ability of the infrasound detection system for infrasound signals.

[0004] Currently, most of the infrasound wind noise reduction devices used at home and abroad are of a pipeline structure. In order to achieve a better wind noise reduction effect, the prior art requires the installation of a large number of air intake heads with different orientations. For example, the wind noise reduction devices installed at three infrasound detection stations in Korla, Kunming, and Xingcheng, China, have installed 96 air intake heads. A considerable number of infrasound stations in the International Monitoring System IMS have even more air intake heads installed, and some even reach hundreds. In order to evenly distribute the large number of air intake heads, it is necessary to expand the aperture of the wind noise reduction device.

[0005] Therefore, although the prior art can well meet the wind noise reduction requirements of fixed infrasound stations, it shows obvious defects when facing portable usage scenarios, mainly manifested as:

[0006] 1) The pipeline-type wind noise reduction device has a large number of structural components, and the laying and installation construction are complex;

[0007] 2) The pipeline-type wind noise reduction device occupies a large area. The floor areas of existing domestic and foreign infrasound wind noise reduction devices are all in the order of dozens of square meters.

[0008] In view of the above defects of the pipeline-type wind noise reduction device in the prior art, the utility model proposes an improved wind noise reduction device applicable to a portable infrasound detection system. Summary of the Utility Model

[0009] The purpose of the utility model is to overcome the problems of the prior pipeline-type wind noise reduction device having a large number of structural components, complex laying and installation construction, and large floor area, and to propose an improved wind noise reduction device applicable to a portable infrasound detection system.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] An improved wind noise reduction device suitable for a portable infrasound detection system comprises a collecting chamber, the collecting chamber is a cylindrical structure, a cavity is arranged inside the collecting chamber, seven pipe interfaces are arranged on the outer surface of the collecting chamber, six of the pipe interfaces are evenly distributed on the side of the collecting chamber at equal intervals, and the seventh pipe interface is arranged on the top surface of the collecting chamber, and the seven pipe interfaces are all hollow structures and communicated with the interior of the collecting chamber;

[0012] The six pipe interfaces on the side of the collecting chamber are respectively detachably connected to a micro-pressure osmosis tube, and each micro-pressure osmosis tube has micron-sized pores on its surface, and a plug is installed at one end of the micro-pressure osmosis tube away from the collecting chamber;

[0013] The pipe interface on the top surface of the collecting chamber is detachably connected to a main connecting pipe, and the other end of the main connecting pipe is connected to the micro-air pressure input interface of the infrasound detection system.

[0014] Furthermore, the collecting chamber is made of stainless steel and has an overall cylindrical structure.

[0015] Furthermore, the micro-air pressure osmosis tube is made of rubber material, and the surface of the tube body of the micro-air pressure osmosis tube is covered with micron-sized pores.

[0016] Furthermore, the main connecting pipe is a hose made of PU material.

[0017] Furthermore, the micro-air pressure permeation tube, the main connecting tube and the tube interface are all connected by threaded connection.

[0018] Furthermore, the micro-air pressure infiltration tube and the main connecting tube are straightened along the ground surface respectively, and fixed to the ground by fixing clips.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The utility model uses a rubber micro-pressure permeation tube to replace the steel pipe, aluminum-plastic pipe, air intake head and other materials used in the prior art. The deployment and withdrawal time can be controlled within 20 minutes, which solves the defects of the prior art with a large number of structural parts and complex laying and installation construction;

[0021] 2. The surface of the micro-pressure permeation tube used in the utility model is covered with micropores, which can replace the traditional air inlet head to complete the reception of changes in ambient atmospheric pressure. There is no need to install an additional air inlet head. The micro-pressure permeation tube wind noise reduction device with a hole radius of 2.5 microns can meet the wind noise reduction needs under normal circumstances, solving the defect of the existing technology that it occupies a large area.

[0022] 3. The micro-pressure permeation tube of the present utility model is easy to coil up. After retraction, the entire improved wind noise reduction device can be stored in a suitcase, which is convenient for carrying and storage.

[0023] In summary, by replacing the structural member materials, reducing the number of structural members, and optimizing the installation process, the device of the present utility model can be quickly deployed and retracted while maintaining the wind noise reduction performance, and is convenient for carrying and storing, meeting the usage requirements of the portable infrasound detection system. Description of the Drawings

[0024] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model.

[0025] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0026] Figure 2 is a schematic diagram of the structure of the collection chamber in the present utility model;

[0027] Figure 3 is a comparison diagram of wind noise signal waveforms;

[0028] Figure 4 is a comparison diagram of wind noise signal waveforms.

[0029] In the figure: 1 collection chamber, 2 micro-pressure permeation tube, 3 plug, 4 main connecting pipe, 5 pipe interface. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model;

[0031] Referring to Figures 1-4 , an improved wind noise reduction device applicable to a portable infrasound detection system includes a collection chamber 1. The collection chamber 1 is a cylindrical structure with a cavity inside. Seven pipe interfaces 5 are provided on the outer surface of the collection chamber 1. Six of the pipe interfaces 5 are evenly distributed at equal intervals on the side surface of the collection chamber 1, and the seventh pipe interface 5 is provided on the top surface of the collection chamber 1. All seven pipe interfaces 5 are hollow structures and are communicated with the inside of the collection chamber 1;

[0032] Six of the pipe interfaces 5 on the side surface of the collection chamber 1 are respectively detachably connected to a micro-pressure permeation tube 2, and micron-level fine holes are provided on the surface of each micro-pressure permeation tube 2. A plug 3 is installed at one end of the micro-pressure permeation tube 2 away from the collection chamber 1;

[0033] The pipe interface 5 on the top surface of the collection chamber 1 is detachably connected to a main connecting pipe 4, and the other end of the main connecting pipe 4 is connected to the micro-pressure input interface of the infrasound detection system.

[0034] Furthermore, the collecting chamber 1 is made of stainless steel, with an overall cylindrical structure and a hollow cavity inside. It has seven pipe interfaces 5 on the outside. Six of the pipe interfaces 5 are evenly distributed on the side of the collecting chamber 1 at intervals of 60°, and the seventh pipe interface 5 is located on the top surface of the collecting chamber 1. As shown in Figure 2 , all seven pipe interfaces 5 are hollow and communicate with the hollow cavity of the collecting chamber 1.

[0035] Furthermore, the micro air pressure permeation tube 2 is made of rubber. The surface of the tube body of the micro air pressure permeation tube 2 is covered with micron-sized pores, and one end of the tube body of the micro air pressure permeation tube 2 is blocked by a plug 3.

[0036] Furthermore, the main connecting pipe 4 is a flexible hose made of PU material. One end of the main connecting pipe 4 is connected to the pipe interface 5 on the top surface of the collecting chamber 1, and the other end of the main connecting pipe 4 is connected to the micro air pressure input interface of the infrasound detection system.

[0037] Furthermore, the micro air pressure permeation tube 2, the main connecting pipe 4 and the pipe interface 5 are all connected by means of screw connection.

[0038] Furthermore, the micro air pressure permeation tube 2 and the main connecting pipe 4 are straightened along the ground surface respectively and fixed to the ground by fixing clips to prevent shaking caused by the wind.

[0039] Collect data for a period of time and compare it with the data collected without connecting the wind noise reduction device of the present utility model to obtain the wind noise reduction effect of the wind noise reduction device of the present utility model.

[0040] The wind noise reduction effect of the wind noise reduction device of the present utility model is as shown in Figure 3 , Figure 4 , and the wind noise reduction ability > 6 dB @ level 3 wind.

Claims

1. An improved wind noise reduction device applicable to a portable infrasound detection system, comprising a converging cavity (1), characterized in that, The collecting chamber (1) is a cylindrical structure with a cavity inside. The outer surface of the collecting chamber (1) is provided with seven pipe interfaces (5), six of which are evenly distributed at equal intervals on the side of the collecting chamber (1), and the seventh pipe interface (5) is arranged on the top surface of the collecting chamber (1). The seven pipe interfaces (5) are all hollow structures and are connected to the inside of the collecting chamber (1); The six pipe interfaces (5) on the side of the collecting chamber (1) are respectively detachably connected to a micro-pressure osmosis tube (2), and each micro-pressure osmosis tube (2) is provided with micron-sized pores on its surface, and a plug (3) is installed at one end of the micro-pressure osmosis tube (2) away from the collecting chamber (1); The pipe interface (5) on the top surface of the collecting chamber (1) is detachably connected to a main connecting pipe (4), and the other end of the main connecting pipe (4) is connected to the micro-air pressure input interface of the infrasound detection system.

2. An improved wind noise reduction device applicable to a portable infrasound detection system according to claim 1, characterized in that, The collecting chamber (1) is made of stainless steel and has an overall cylindrical structure.

3. An improved wind noise reduction device applicable to a portable infrasound detection system according to claim 1, characterized in that, The micro-pressure permeation tube (2) is made of rubber material, and the surface of the tube body of the micro-pressure permeation tube (2) is covered with micron-sized pores.

4. An improved wind noise reduction device applicable to a portable infrasound detection system according to claim 1, characterized in that The main connecting pipe (4) is a hose made of PU material.

5. An improved wind noise reduction device applicable to a portable infrasound detection system according to claim 1, characterized in that, The micro-pressure permeation tube (2), the main connecting tube (4) and the tube interface (5) are all connected in a threaded manner.

6. An improved wind noise reduction device applicable to a portable infrasound detection system according to claim 1, characterized in that, The micro-air pressure infiltration tube (2) and the main connecting tube (4) are respectively straightened along the ground surface and fixed to the ground by fixing clips.

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