Sensing device for carrying out source searching and positioning on traffic noise

Abstract

The utility model provides a sensing device for searching and positioning traffic noise, and belongs to the technical field of noise sensing devices. The sensing device comprises a shell, a microphone module array, a camera module and a signal processing board, the signal processing board is fixedly mounted in the inner cavity of the shell; the microphone module arrays are distributed on the outer surface of the same side of the shell; the camera module is fixedly mounted in the shell; a camera of the camera module extends out of the shell and is located on the outer surface of the same side with the microphone module array. The microphone module array and the camera module are electrically connected with the signal processing board; vertical coaxial rotating shafts are arranged on the two sides of the shell correspondingly. And a gear is fixedly mounted on the rotating shaft. The sensing device can be mounted on the driving device and is used for detecting the source orientation of a noise signal; and the signal processing board sends out a signal to control the external driving device to drive the gear to rotate, so that the angle of the sensing device is changed, and the noise signal source is tracked.

Description

Technical Field

[0001] The utility model relates to the technical field of noise sensing devices, and particularly relates to a sensing device for source location of traffic noise. Background Art

[0002] With the acceleration of China's urbanization process, there has been a blowout growth in the urban road network density and the number of motor vehicles in possession, resulting in an increasing number of cases where the noise exceeds the standard on both sides of traffic arteries in recent years. Road traffic noise pollution has become a major public nuisance in urban pollution, bringing serious adverse effects to people's daily life, work and rest, and has become one of the most complained pollution problems by residents in recent years. Therefore, strengthening the reasonable monitoring and scientific evaluation of road traffic noise has a very positive effect on the effective prevention and control of traffic noise pollution. However, due to the long-term dynamic changes in traffic information such as road surface conditions, vehicle conditions and traffic congestion conditions, traditional noise measurement methods can only obtain the average noise intensity level of monitoring points, and it is difficult to track, locate and record the vehicles or other moving noise sources that generate the main noise on the road, bringing great difficulties to the effective monitoring and suppression of road noise.

[0003] Sound source tracking is the process of locating the sound source position and tracking the movement trajectory of the sound source through the analysis and processing of sound signals, which is widely used in fields such as military, medical, aviation and aerospace technologies. The algorithms for realizing sound tracking mainly include the extended Kalman filter algorithm, the unscented Kalman filter algorithm and the cubature Kalman filter algorithm. There are already products using sound source tracking technology on the market, that is, by identifying the sound source direction and then lighting the signal lamp in the corresponding direction. However, this product is not suitable for traffic monitoring scenarios.

[0004] On the other hand, there are already devices with rotatable monitoring heads applied to traffic monitoring on the market, but this device does not have a sound source tracking sensor. Therefore, how to improve this device and combine the sound source tracking technology to obtain a monitoring device that can track the sound source is a new market demand. Content of the Utility Model

[0005] In order to solve the problems mentioned in the background art, the utility model provides a sensing device for source location of traffic noise. This sensing device can be installed on a driving device to obtain a monitoring device that can track the sound source. This monitoring device can be flexibly installed on a road crossbar or by the roadside to realize an intelligent monitoring system for real-time detection and precise location of near-field sound noise signals, so as to obtain information such as the source, sound intensity and occurrence time of road noise, and provide a design reference for the effective suppression of traffic noise, which will help to alleviate the rising trend of domestic traffic noise, protect the sound environment and improve people's quality of life.

[0006] Specifically:

[0007] A sensing device for source location of traffic noise, which includes a housing, a microphone module array, a camera module and a signal processing board;

[0008] The signal processing board is fixedly installed in the inner cavity of the housing; the microphone module array is distributed on the outer surface of the same side of the housing; the camera module is fixedly installed in the housing; the camera of the camera module extends out of the housing and is located on the outer surface of the same side as the microphone module array; both the microphone module array and the camera module are electrically connected to the signal processing board;

[0009] Vertical coaxial rotating shafts are respectively arranged on both sides of the housing; gears are fixedly installed on the rotating shafts.

[0010] When implementing the above embodiments, further, at least one side surface of the housing is hemispherical, and the microphone module array is distributed on the hemispherical side surface of the housing.

[0011] When implementing the above embodiments, further, the camera is located at the center of the hemispherical side surface.

[0012] When implementing the above embodiments, further, the microphone module array has 18 microphone modules.

[0013] When implementing the above embodiments, further, the 18 microphone modules are divided into 6 columns, the included angle between adjacent columns is 60°, each column has 3 microphone modules, and the included angle between adjacent microphone modules in the same column is 22.5°; the included angle between the first microphone module in each column and the camera is 22.5°.

[0014] When implementing the above embodiments, further, the microphone module array is electrically connected to the signal processing board through microphone module leads.

[0015] When implementing the above embodiments, further, the camera module is electrically connected to the signal processing board through camera leads.

[0016] When implementing the above embodiments, further, the housing is provided with an installation opening.

[0017] When implementing the above embodiments, further, it further includes a housing cover, and the housing cover is sealingly installed at the installation opening.

[0018] The working principle of the sensing device is as follows: The microphone module array distributed on the housing detects external noise signals in real time and transmits them to the signal processing board. After signal analysis and calculation, the source direction of the noise signal is obtained. Then, the signal processing board sends a signal to control the external driving device to drive the gear to rotate, thereby changing the angle of the sensing device, realizing the tracking of the noise signal source, and controlling the camera to record illegal acts of the noise source.

[0019] The beneficial effect of the present utility model is that through the specially designed spherical microphone module array, the real-time detection of noise source signals within a 180° range in front of the sensor is realized. It has a wide detection range, can adjust the posture of the sensor in real time, track the noise source in real time and record its illegal acts, and can effectively improve the level and effect of road noise monitoring. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings; in the following description, the positional relationships in the drawings, unless otherwise specified, are all based on the directions shown by the components in the drawings.

[0021] Figure 1 It is a longitudinal sectional structure diagram of a sensing device provided by the present utility model for source location of traffic noise.

[0022] Figure 2 It is a top view of the above-mentioned sensing device.

[0023] Reference Numerals:

[0024] 1. Housing; 2. Camera; 3. Microphone module; 4. Screw; 5. Signal processing board; 6. Gear; 7. Rotating shaft; 8. Housing cover; 9. Camera lead; 10. Screw; 11. Microphone module lead; 12. Screw. Detailed Description of the Embodiment

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Embodiment

[0026] As shown in Figure 1 –2, a sensing device for source location of traffic noise, the microphone module 3 is mounted on the spherical outer surface of the housing 1, and is connected to the internal signal processing board 5 through the microphone module lead 11 passing through the housing 1;

[0027] The camera module is fixed to the fixing plate inside the housing 1 by screws 4, and is connected to the signal processing board 5 through the camera lead 9, and the camera 2 passes through the mounting hole in the middle of the housing 1;

[0028] The housing 1 is provided with a rotating shaft 7 on each side, and the gear 6 is connected to the rotating shaft 7 by a key;

[0029] The housing 1 is provided with a housing cover 8, and the housing cover 8 is connected to the housing 1 by screws 10;

[0030] The signal processing board 5 is fixedly installed in the inner cavity of the housing 1 by screws 12.

[0031] The microphone module array is composed of 18 microphone modules 3 distributed and arranged on the outer surface of the housing 1. The microphone module array is divided into 6 columns, and the included angle between adjacent columns is 60°. Each column has 3 of the microphone modules, and the included angle between adjacent microphone modules in the same column is 22.5°; the included angle between the first microphone module in each column and the camera is 22.5°.

[0032] When the sensing device works, it needs to be installed on an external driving device. The gear 6 meshes with the driving shaft on the driving device, and the signal processing board 5 is electrically connected to the driving device, and is powered by the external driving device and transmits electrical signals to the external driving device.

[0033] The microphone module selected in Embodiment 1 is ky–038, and the camera module selected is OV9732.

[0034] Its working principle is:

[0035] The microphone modules 3 distributed on the housing 1 detect the external noise signals in real time and transmit them to the signal processing board 5. After signal analysis and calculation, the source direction of the noise signals is obtained; and the signal processing board 5 sends out signals to control the external driving device to drive the gear 6 to rotate, thereby changing the angle of the sensing device, realizing the tracking of the noise signal source, and controlling the camera 2 to record illegal acts of the noise source.

[0036] It should be noted that the present invention only relates to the design of the hardware structure, that is, a new type of sensing device is invented, and does not involve improvements in software. The sound source location tracking technology program adopted by its signal processing board 5 can adopt the program on the indicator light sound source location device mentioned in the background technology, but finally the electrical signal for driving the indicator light to light is replaced with the electrical signal for driving the external driving motor to rotate.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sensing device for source location of traffic noise, characterized in that : It includes a housing, a microphone module array, a camera module, and a signal processing board; The signal processing board is fixedly installed in the internal cavity of the housing; the microphone module array is distributed on the outer surface of the same side of the housing; The camera module is fixedly installed in the housing; the camera of the camera module extends out of the housing and is located on the outer surface of the same side as the microphone module array; both the microphone module array and the camera module are electrically connected to the signal processing board; Vertical coaxial rotating shafts are respectively provided on both sides of the housing; gears are fixedly installed on the rotating shafts.

2. The sensing device for traffic noise source localization according to claim 1, characterized in that At least one side surface of the housing is hemispherical, and the microphone module array is distributed on the hemispherical side surface of the housing.

3. The sensing device for traffic noise source location according to claim 2, characterized in that The camera is located at the center of the hemispherical side surface.

4. The sensing device for traffic noise source location according to claim 3, characterized in that The microphone module array has 18 microphone modules.

5. The sensing device for traffic noise source localization according to claim 4, characterized in that The 18 microphone modules are divided into 6 columns, the included angle between adjacent columns is 60°, each column has 3 microphone modules, and the included angle between adjacent microphone modules in the same column is 22.5°; the included angle between the first microphone module in each column and the camera is 22.5°.

6. The sensing device for traffic noise source location according to claim 1, characterized in that The microphone module array is electrically connected to the signal processing board through microphone module leads.

7. The sensing device for source localization of traffic noise according to claim 1, characterized in that The camera module is electrically connected to the signal processing board through camera leads.

8. The sensing device for traffic noise source localization according to claim 1, characterized in that The housing is provided with an installation opening.

9. The sensing device for traffic noise source location according to claim 8, characterized in that It further includes a housing cover, and the housing cover is sealingly installed at the installation opening.

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