CN212030728U

CN212030728U - Environmental noise monitoring system

Info

Publication number: CN212030728U
Application number: CN202020935428.6U
Authority: CN
Inventors: 沈松
Original assignee: Oriental Zhice Beijing Technology Co ltd
Current assignee: Oriental Zhice Beijing Technology Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2020-11-27
Anticipated expiration: 2030-05-28

Abstract

The application relates to an environmental noise monitoring system, which comprises a measuring microphone device, a controller and a wireless transmission device. The measurement transaudient device is capable of converting sound into a first noise signal. The controller is electrically connected with the measuring sound transmission device. The controller is capable of receiving the first noise signal and determining a sound pressure level based on the first noise signal. The wireless transmission device is electrically connected with the controller. The measurement sound transmission device, the controller and the wireless transmission device are coaxially arranged from top to bottom. The devices are coaxially arranged, so that various modules are combined into an integrated device, and the problems of low integration level, large size and the like are effectively solved.

Description

Environmental noise monitoring system

Technical Field

The application relates to the technical field of noise testing, in particular to an environmental noise monitoring system.

Background

Systems capable of monitoring ambient noise currently measure the noise conditions at the location of the device. Some ambient noise devices also have a weather measurement module attached to them. Currently, a monitoring system capable of detecting environmental noise is generally implemented by installing module devices such as a sound level meter, an outdoor microphone, an industrial personal computer, a wireless data transmission module, and a power supply in an outdoor instrument box. The method has the problems of low system integration level, large volume and the like.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an environmental noise monitoring system for solving the technical problems of low integration level, large size and the like in the conventional technical solutions.

An ambient noise monitoring system comprising:

a measurement transmitter capable of converting sound into a first noise signal;

the controller is electrically connected with the sound transmission device and can receive the first noise signal and determine the sound pressure level according to the first noise signal; and

the wireless transmission device is electrically connected with the controller;

the measurement sound transmission device, the controller and the wireless transmission device are coaxially arranged from top to bottom.

In one embodiment, the wireless transmission device is disposed between the measurement sound transmission device and the controller, and the measurement sound transmission device, the wireless transmission device and the controller are detachably connected, and the wireless transmission device is conical.

In one embodiment, the method further comprises the following steps:

and the positioning sound transmission device is electrically connected with the controller and is detachably connected with the wireless transmission device and the controller respectively.

In one embodiment, the positioning acoustic transmission device includes:

the positioning microphones are arrayed on the same mounting surface, and the number of the positioning microphones is more than or equal to 4.

In one embodiment, the measuring and sound transmitting device is a condenser microphone, and the positioning microphone is a condenser microphone or a micro-electromechanical microphone.

In one embodiment, the method further comprises the following steps:

and the electrostatic excitation device is electrically connected with the measurement sound transmission device and is detachably connected with the wireless transmission device and the positioning sound transmission device respectively.

In one embodiment, the method further comprises the following steps:

the power adapter device is respectively connected with the measuring sound transmission device, the controller, the wireless transmission device, the positioning sound transmission device and the electrostatic excitation device in an electric connection mode, in addition, the power adapter device is detachably connected with the controller, and the power adapter device is arranged on one side, far away from the positioning sound transmission device, of the controller.

In one embodiment, the method further comprises the following steps:

the mounting part is detachably connected with the power supply adapter device, and the mounting part is arranged on one side, far away from the controller, of the power supply adapter device.

In one embodiment, the wireless transmission apparatus includes:

the data communication component is electrically connected with the controller; and

and the Beidou positioning component is electrically connected with the controller.

In one embodiment, the data communication assembly comprises a 3G/4G/5G communication assembly, a WIFI assembly and a Bluetooth communication module.

The environmental noise monitoring system comprises a measuring sound transmission device, a controller and a wireless transmission device. The measurement transaudient device is capable of converting sound into a first noise signal. The controller is electrically connected with the measuring sound transmission device. The controller is capable of receiving the first noise signal and determining a sound pressure level based on the first noise signal. The wireless transmission device is electrically connected with the controller. The measurement sound transmission device, the controller and the wireless transmission device are coaxially arranged from top to bottom. The devices are coaxially arranged, so that various modules are combined into an integrated device, and the problems of low integration level, large size and the like are effectively solved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of an embodiment of an ambient noise monitoring system;

FIG. 2 is a schematic diagram of an electrical connection of the environmental noise monitoring system in one embodiment;

FIG. 3 is a schematic diagram of an embodiment of an ambient noise monitoring system;

FIG. 4 is a diagram illustrating an electrical connection of the environmental noise monitoring system according to an embodiment.

Description of the main element reference numerals

Ambient noise monitoring system 100

Measuring microphone device 10

Controller 20

Input unit 21

Display unit 22

Wireless transmission device 30

Data communication module 31

Big dipper positioning assembly 32

Positioning sound transmission device 40

Positioning microphone 41

Electrostatic actuator 50

Power adapter 60

Mounting member 70

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the embodiments disclosed below.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first acquisition module may be referred to as a second acquisition module, and similarly, a second acquisition module may be referred to as a first acquisition module, without departing from the scope of the present application. The first acquisition module and the second acquisition module are both acquisition modules, but are not the same acquisition module.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, as shown in FIG. 1, the present application provides an ambient noise monitoring system 100. The ambient noise monitoring system 100 includes a measurement transmitter 10, a controller 20, and a wireless transmitter 30. The measurement transaudient device 10 is capable of converting sound into a first noise signal. The controller 20 is electrically connected to the measurement microphone device 10. The controller 20 is capable of receiving the first noise signal and determining a sound pressure level based on the first noise signal. The wireless transmission device 30 is electrically connected to the controller 20. Wherein, the measurement sound transmission device 10, the controller 20 and the wireless transmission device 30 are coaxially arranged from top to bottom.

It can be understood that, referring to fig. 1 and fig. 2, the measurement sound transmission device 10, the controller 20 and the wireless transmission device 30 are coaxially arranged from top to bottom, and have the characteristic of having less influence on the sound field in the air.

It is understood that the structure of the controller 20 is not particularly limited as long as the controller 20 receives the first noise signal and determines a sound pressure level according to the first noise signal. Alternatively, the controller 20 may be a microcontroller 20 or a single chip microcomputer. It will be appreciated that the controller 20 may also perform the calculation and storage of ambient acoustic indicators. That is, the controller 20 may store the sound pressure level of the sound.

It can be understood that the controller 20 is designed to replace a general industrial personal computer by an embedded system. The controller 20 is primarily capable of performing signal acquisition, computation, and storage. And the controller 20 further includes an input unit 21 and a display unit 22. The input unit 21 may be a plurality of keys. The display unit 22 may be an OLED display. The input unit 21 and the display unit 22 are used for some basic system settings. The controller 20 further includes a network switch function, which is used to transmit data through the wireless transmission device 30.

It is to be understood that the structure, the installation position, and the model of the measurement sound transmission device 10 are not particularly limited as long as the sound pressure signal can be collected. The sound pressure signal is an electrical signal converted from the monitored sound signal.

In an alternative embodiment, in order to measure the sound pressure level of the sound source, a microphone with higher measurement accuracy is required, and thus the measurement sound transmission device 10 may employ a condenser microphone to monitor the sound pressure level of the sound source. At this time, in order to exclude the influence of other components of the sound source localization system on the sound field, the measurement sound transmission device 10 may be disposed at the uppermost side of the entire system. At this time, the sound pressure signal collected by the measurement sound transmission device 10 can determine the sound pressure level of the sound source.

Alternatively, the measurement sound transmission device 10 may include a structure having a rain-proof structure, a wind-proof structure, and a bird-stop prevention structure. The specific structures of the rain-proof structure, the wind-proof structure and the bird-stop prevention structure are not limited as long as rain-proof, wind-proof and/or bird-stop prevention can be achieved. The above-described guard structure can improve the service life of the measurement sound transmission device 10.

It is to be understood that the structure of the wireless transmission device 30 is not particularly limited. As long as data can be transmitted through the wireless transmission device 30. Optionally, the wireless transmission device 30 includes a data communication component 31 and a Beidou positioning component 32. The data communication assembly 31 is electrically connected to the controller 20. The Beidou positioning component 32 is electrically connected with the controller 20. In an optional embodiment, the data communication component 31 includes a 3G/4G/5G communication component, a WIFI component, and a bluetooth communication module. The Beidou positioning component 32 can acquire information such as longitude, latitude, altitude and absolute time.

It can be understood that the data communication component 31 and the beidou positioning component 32 are arranged inside the non-metal shell. The shape of the non-metal shell can be conical, so that the influence on the peripheral sound field of the sound transmission device 10 can be effectively reduced. The use of non-metallic materials ensures that the wireless signals are not shielded. Four wireless components and antennas thereof are arranged inside, so that the transmission and the reception of wireless signals can be effectively ensured.

In this embodiment, the environmental noise monitoring system 100 includes a measurement microphone 10, a controller 20, and a wireless transmission device 30. The measurement transaudient device 10 is capable of converting sound into a first noise signal. The controller 20 is electrically connected to the measurement microphone device 10. The controller 20 is capable of receiving the first noise signal and determining a sound pressure level based on the first noise signal. The wireless transmission device 30 is electrically connected to the controller 20. Wherein, the measuring and sound transmitting device 10, the controller 20 and the wireless transmission device 30 are coaxially arranged. The devices are coaxially arranged, so that various modules are combined into an integrated device, and the problems of low integration level, large size and the like are effectively solved.

In one embodiment, the wireless transmission device 30 is disposed between the measurement sound transmission device 10 and the controller 20, and the measurement sound transmission device 10, the wireless transmission device 30 and the controller 20 are detachably connected.

In an alternative embodiment, as shown in fig. 1, the measurement microphone assembly 10, the wireless transmission assembly 30, and the controller 20 are arranged in sequence from top to bottom. That is, the measurement sound transmission device 10 is located at the highest position, so that the reflected signal of the sound signal from other modules can be prevented from being received by the measurement microphone, and the accuracy of the measurement sound can be ensured. The wireless transmission device 30 is located on the second layer, which can effectively ensure that the wireless signal is shielded by other components to the minimum.

Referring to fig. 3 and 4 together, in one embodiment, the environmental noise monitoring system 100 further includes an electrostatic stimulation device 50. The electrostatic excitation device 50 is electrically connected to the measurement microphone device 10. The electrostatic actuator 50 is detachably connected to the wireless transmission device 30.

It will be appreciated that the electrostatic stimulation device 50 is located on the third layer to minimize interference of the electromagnetic waves generated by the electrostatic stimulation device with the circuit board of the controller 20. The electrostatic excitation device 50 can output a high-voltage bias sinusoidal voltage signal, which is transmitted to the top of the measurement sound transmission device 10 through a cable, and the analog microphone receives a single-frequency sound with a fixed high sound pressure level, so that the measurement sound transmission device 10 can be calibrated. The electrostatic excitation device 50 is detachably connected to the wireless transmission device 30 and the positioning acoustic transmission device 40, so that certain modules can be flexibly selected or replaced.

In one embodiment, the environmental noise monitoring system 100 further comprises a positioning acoustic device 40. The positioning sound transmission device 40 is electrically connected to the controller 20. Also, the positioning sound transmission device 40 is detachably connected to the electrostatic excitation device 50 and the controller 20, respectively.

It will be appreciated that in one embodiment, the positioning microphone assembly 40 includes a plurality of positioning microphones 41 arranged in an array on the same mounting surface. The controller 20 obtains a first time difference between the sound pressure signal collected by each of the positioning microphones 41 and the sound pressure signals collected by the other positioning microphones 41, and further obtains angle information of a projection point of the sound source in the installation surface, so as to determine a direction of the sound source.

It is to be understood that the structure, the installation position, and the type of the positioning sound transmission device 40 are not particularly limited as long as the sound pressure signal can be collected. The sound pressure signal is an electrical signal converted from the monitored sound signal.

In an alternative embodiment, the sound pressure signals collected by the positioning microphone device 40 can only determine the orientation of the sound source. The positioning and sound-transmitting device 40 is mainly used for sound source azimuth calculation, and therefore, a condenser microphone may be used, and other low-cost microphones such as a microphone based on the MEMS (micro electro Mechanical Systems) principle may be used. The positioning sound transmission devices 40 are only required to be arranged in the installation surface, and the positioning sound transmission devices 40 are not required to be arranged in the vertical direction, so that the number of the positioning sound transmission devices 40 can be reduced, the cost is effectively reduced, the structural complexity is reduced, and the calculation amount is reduced.

It is to be understood that the number of the positioning microphones 41 and the number of the measurement microphone devices 10 are not particularly limited. The greater the number of the positioning microphones 41, the higher the monitoring accuracy of the sound source azimuth. In one embodiment, the number of the positioning microphones 41 is greater than or equal to 4. Alternatively, the ambient noise monitoring system 100 comprises a measuring microphone device 10 capable of determining the sound pressure level and 8 positioning microphones 41 capable of determining the sound source direction.

It is understood that the sound source direction may be angle information of a projection point of a sound source within the installation plane. The angle information may be a deflection angle of a sound source projection point with respect to a preset point in the mounting surface.

In one embodiment, the positioning and sound-transmitting means 40 is located in the fourth layer. The positioning sound-transmitting devices 40 are located in the same horizontal plane. The positioning sound-transmitting devices 40 may be generally uniformly arranged on a circle, however, it is to be understood that the arrangement of the positioning sound-transmitting devices 40 is not limited to a circle. The arrangement of the positioning sound-transmitting devices 40 is not limited to the equal-interval arrangement.

Alternatively, referring to fig. 4, a plurality of the positioning sound-transmitting devices 40 are arranged in a circular ring at equal intervals. At this time, one preset point in the mounting surface may be a center of the circular ring shape. The angle information of the projection point of the sound source in the installation plane may be regarded as a horizontal angle. In the environmental noise monitoring, the orientation of the main noise is recorded. The noise bearing may be described by a horizontal angle. The horizontal angle is an angle in the range of 0 to 360 on the horizontal plane centered on the center of the circular ring shape to determine from which direction the sound source comes in the horizontal plane. For example, the positioning sound-transmitting device 40 is arranged in the xy horizontal plane composed of the X axis and the Y axis. The measurement microphone assembly 10 is located on the Z-axis perpendicular to the OXY horizontal plane. The distance from the measurement sound transmission device 10 to the installation surface is D. The sound source is located at any point a in space. The sound source is projected at point A' of the OXY plane. The sound source's orientation in the xyz coordinate system is represented by the horizontal angle θ.

In an optional embodiment, the distance between any two adjacent positioning sound-transmitting devices 40 is smaller than a preset value, and the distance between the measurement sound-transmitting device 10 and the mounting surface is larger than the preset value. The preset value is half of the wavelength of the maximum frequency noise in the monitoring noise. The positioning sound transmission device 40 is far away from the measurement sound transmission device 10, so that the interference of a sound field near the measurement sound transmission device 10 is avoided, and the measurement accuracy of the measurement sound transmission device 10 is ensured.

The horizontal angle θ of the sound source (angle information of the projection point of the sound source in the installation plane) is determined by all the localization microphones 41. Since the times at which the sound emitted from the sound source reaches the respective microphones are different, the angle θ of the sound source on the horizontal plane can be determined by the time difference of the sound signals received by the respective positioning microphones 41. The pitch of the positioning microphones 41 is less than half the wavelength of the measured noise, and the time difference of the sound signals received by the positioning microphones 41 can be represented by a phase difference. The angle θ of the sound source in the horizontal plane can be calculated by any beam forming algorithm capable of noise source localization. The beamforming algorithm includes a delay accumulation algorithm, a MUSIC algorithm (Multiple Signal Classification algorithm), an SRP algorithm (fairness algorithm), and the like. According to such algorithms, the number of said positioning microphones 41 determines the accuracy of the horizontal angle θ.

In one embodiment, the environmental noise monitoring system 100 further includes a power adapter 60. The power adapter 60 is electrically connected to the measuring microphone 10, the controller 20, the wireless transmission device 30, the positioning microphone 40 and the electrostatic excitation device 50, respectively. The power adapter 60 is detachably connected to the controller 20, and the controller 20 is disposed between the power adapter 60 and the positioning sound transmitter 40. I.e. the power adapter means 60 is arranged on the side of the controller 20 remote from the positioning sound transmission means 40.

It will be appreciated that the power adapter 60 is located at the sixth level. The power adapter 60 is an independent module, and the purpose is to replace different types of power adapters 60 according to actual power supply conditions. For example, the power adapter 60 may be designed as different types of power adapters 60, such as dc input, commercial power 220V ac input, solar battery input, and so on.

In one embodiment, the ambient noise monitoring system 100 further includes a mount 70. The mounting member 70 is detachably connected to the power adapter 60. And, the mounting member 70 is disposed on a side of the power adapter 60 away from the controller 20. The mounting member 70 may be a mounting flange. The mounting member 70 is located at the lowermost layer. The mounting member 70 enables the mounting of the main structure to the post at a distance from the ground to avoid the measurement of sound from being affected by the ground or the associated building. The environmental noise monitoring system 100 is cylindrical in shape, and can effectively ensure that interference on a sound field, a wireless signal and an electromagnetic field is minimum.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An environmental noise monitoring system, comprising:

the wireless transmission device is electrically connected with the controller;

2. The environmental noise monitoring system of claim 1, wherein the wireless transmission device is disposed between the measurement sound transmission device and the controller, and the measurement sound transmission device, the wireless transmission device and the controller are detachably connected to each other, and the wireless transmission device is conical in shape.

3. The ambient noise monitoring system of claim 2, further comprising:

4. The ambient noise monitoring system of claim 3, wherein the positioning acoustic means comprises:

the positioning microphones are arrayed on the same mounting plane, and the number of the positioning microphones is more than or equal to 4.

5. The ambient noise monitoring system according to claim 4, wherein the measurement sound transmission means is a condenser microphone and the positioning microphone is a condenser microphone or a micro-electromechanical microphone.

6. The ambient noise monitoring system of claim 5, further comprising:

7. The ambient noise monitoring system of claim 6, further comprising:

8. The ambient noise monitoring system of claim 7, further comprising:

9. The ambient noise monitoring system of claim 8, wherein the wireless transmission means comprises:

the wireless data communication component is electrically connected with the controller; and

10. The ambient noise monitoring system of claim 9, wherein the data communication component comprises a 3G/4G/5G communication component, a WIFI component, and a bluetooth communication module.