Portable noise pollution source rapid identification device

Abstract

The invention provides portable noise pollution source rapid identification equipment, which comprises a folding bracket, a dustproof box body, a noise source reading assembly, a noise isolation orientation device, a sound source identification assembly and an environment monitoring assembly, and is characterized in that the dustproof box body is fixedly mounted above the folding bracket; the noise source reading assembly is installed in the dustproof box body, the noise isolation orientation device is arranged on the outer ring of the noise source reading assembly in a sleeving mode, and the sound source recognition assembly and the environment monitoring assembly are arranged in the dustproof box body and electrically connected with the noise source reading assembly. The environment monitoring assembly is used for monitoring environment data of the equipment, the environment data comprises temperature, humidity, wind speed and air pressure data, the dustproof box body is in a hollow cylindrical shape, and the dustproof box body comprises a top cover, a bottom cover and a side dustproof net. According to the invention, automatic identification and positioning of the noise source are realized, and the noise source identification accuracy is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of noise identification, and particularly relates to a portable noise pollution source rapid identification device. BACKGROUND

[0002] With the acceleration of urbanization and industrial development, noise pollution has become an important environmental problem that affects the quality of life of residents, damages human health (such as causing hearing impairment, sleep disorders, cardiovascular diseases, etc.) and interferes with normal work and study. The first key to effective noise pollution control and management is to accurately and quickly identify noise pollution sources to clarify the responsibility subject and take targeted control measures.

[0003] At present, the mainstream technical means for noise monitoring and source identification have many shortcomings, which are difficult to meet the actual needs of on-site rapid, portable and accurate identification. The traditional sound level meter is mainly used to measure the sound pressure level (decibel value) at a specific point, such as equivalent continuous A sound level (Leq), maximum sound level (Lmax), etc., which can only reflect the overall noise level at the measurement point, cannot distinguish the contribution of each independent sound source in the mixed noise, and cannot point out the direction and position of the specific sound source. The identification of pollution sources mainly relies on the movement of the equipment by the operator, repeated measurement and subjective experience, which is low in efficiency, strong in subjectivity and difficult to ensure accuracy, especially in complex sound field environment (such as the coexistence of multiple sound sources), the effect is worse;

[0004] The fixed noise monitoring station has a large investment and a long cycle in the process of deploying fixed stations, and has a limited coverage range, which is difficult to achieve full-area monitoring without dead angles, and cannot respond quickly and track and locate the sudden, mobile or intermittent noise pollution events (such as night construction noise, traffic whistling, square dance sound, sudden abnormal sound of equipment). Even if the device using the basic microphone array is used, the positioning error in the complex sound field such as multiple sound source superposition and reflection environment exceeds 30%, which requires the on-site personnel to move the equipment repeatedly for manual investigation. In addition, noise changes in different outdoor environments, and the noise after being affected by the outdoor environment has differences with the noise in the noise database, so the comparison effect is poor, and therefore there is an urgent need in the art for a device capable of quickly identifying noise pollution sources. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the above technical problems, the present application provides a portable noise pollution source rapid identification device, which realizes automatic identification and positioning of noise sources, and effectively improves the accuracy of noise source identification.

[0007] (II) Technical scheme

[0008] The application provides a portable noise pollution source rapid identification equipment, which comprises a folding support, a dustproof box body, a noise sound source reading assembly, a noise isolation directional device, a sound source identification assembly and an environmental monitoring assembly, the dustproof box body is fixedly installed above the folding support, the noise sound source reading assembly is installed in the dustproof box body, the noise isolation directional device is sleeved on the outer circle of the noise sound source reading assembly, the sound source identification assembly and the environmental monitoring assembly are arranged in the dustproof box body and are electrically connected with the noise sound source reading assembly, the environmental monitoring assembly is used for monitoring environmental data where the equipment is located, and the environmental data comprises temperature, humidity, wind speed and air pressure data.

[0009] In some embodiments of the application, the dustproof box body is in a hollow cylindrical shape, and the dustproof box body comprises a top cover, a bottom cover and a side dustproof net, the side dustproof net is fixedly installed between the top cover and the bottom cover, and the side dustproof net is connected with the top cover and the bottom cover through buckling.

[0010] In some embodiments of the application, the noise isolation directional device comprises a first rotary motor, a first rotary rod and a sound insulation cylindrical sleeve, the sound insulation cylindrical sleeve is arranged at a central position in the dustproof box body, the first rotary motor is fixedly installed on the bottom cover of the dustproof box body, the output end of the first rotary motor is connected with the first rotary rod, the other end of the first rotary rod is connected with the bottom end of the sound insulation cylindrical sleeve, and the side surface of the sound insulation cylindrical sleeve is provided with a noise directional hole.

[0011] In some embodiments of the application, the noise sound source reading assembly comprises a second rotary motor, a second rotary rod, a noise receiving device and a rotary disc, the second rotary motor is fixedly installed on the top of the dustproof box body, the rotary disc is arranged in the dustproof box body, and the two ends of the second rotary rod are respectively connected with the output end of the second rotary motor and the rotary disc; the noise receiving device is provided with a plurality of noise receiving devices which are arranged on the rotary disc in a surrounding manner.

[0012] In some embodiments of the application, the noise receiving device comprises a telescopic motor, a telescopic rod, a sound insulation circular arc plate and a noise receiving instrument, the telescopic motor is fixedly installed on the rotary disc, the two ends of the telescopic rod are respectively connected with the noise receiving instrument and the output end of the telescopic motor, the sound insulation circular arc plate is fixedly installed on the telescopic rod at the back side of the noise receiving instrument, and the size of the sound insulation circular arc plate is matched with the noise directional hole on the side surface of the sound insulation cylindrical sleeve.

[0013] In some embodiments of the application, an angle tilting device is arranged at the connection position between the noise receiving instrument and the sound insulation circular arc plate, and the angle tilting device is used for controlling the change of the pitch angle of the noise receiving instrument.

[0014] In some embodiments of the present application, the folding support comprises a support plate, a fixed hinge joint, a first hinge rod, a second hinge rod and a hinge positioning device, the fixed hinge joint is fixedly installed at the bottom of the support plate, two ends of the first hinge rod are connected with the fixed hinge joint and the second hinge rod respectively, and the hinge positioning device is installed at the connection between the first hinge rod and the fixed hinge joint and the connection between the second hinge rod and the first hinge rod.

[0015] In some embodiments of the present application, the central axes of the rotating disc, the sound insulation cylindrical sleeve and the dustproof box are on a straight line, the noise directional hole is provided with only one, and the noise receiving device is provided with four groups.

[0016] In some embodiments of the present application, the support plate is provided with a groove matching the size of the dustproof box, and the dustproof box is fixedly installed in the groove.

[0017] In some embodiments of the present application, the sound source identification assembly comprises a sound source storage module, a sound source simulation module and a sound source comparison module, and the sound source storage module, the sound source simulation module and the sound source comparison module are electrically connected with the noise sound source reading assembly.

[0018] In some embodiments of the present application, the sound source storage module is used for storing primary data of various noises, the sound source simulation module is used for simulating and generating secondary data of various noises in the current environment based on the primary data of the noises, the sound source comparison module is used for comparing real data of the noises received by the noise sound source reading assembly with the secondary data of the noises, and the environment monitoring assembly is used for monitoring environment data of the device and transmitting the environment data to the sound source simulation module.

[0019] (Three) beneficial effects

[0020] From the above technical solutions, the present application has at least one of the following beneficial effects:

[0021] (1) The noise receiving device of the present application can extend the noise receiver from the noise directional hole to identify the noise, at this time the sound insulation circular arc plate closes the noise directional hole, after noise collection, the noise receiver is retracted into the sound insulation cylindrical sleeve, the sound insulation cylindrical sleeve is rotated to the position of the next noise receiving device under the drive of the first rotary motor, and then the noise receiving device repeats the above action, when multiple noise receiving devices complete noise collection, the three noise receiving devices with the highest decibel, the second highest decibel and the third highest decibel are determined, the noise source position is in the included angle formed by the two noise receiving devices with the second highest decibel and the third highest decibel; then the noise receiving device extends from the noise directional hole, and the sound insulation cylindrical sleeve and the noise receiving device rotate synchronously in the included angle under the drive of the first rotary motor and the second rotary motor, the actual highest decibel noise direction is determined to determine the position of the noise source, the sound insulation cylindrical sleeve and the noise receiving device of the present application work cooperatively through the innovative rotary sound insulation cylindrical sleeve, active acoustic focusing of the noise target direction is realized, the rotation of the sound insulation cylindrical sleeve cooperates with the unique noise directional hole on the side surface to form a dynamic acoustic shield, and non-target direction noise interference (especially lateral and rear interference) is effectively suppressed.

[0022] (2) The environmental monitoring assembly of the present application obtains the environmental parameters (such as temperature, humidity, wind speed, etc.) of the equipment deployment site in real time, the sound source simulation module dynamically simulates the “second-order” characteristic data of various potential noise sources under the current environmental conditions by using the basic noise primary data stored in the sound source storage module in combination with real-time environmental data, a dynamic noise fingerprint library suitable for the on-site environment is established, and the sound source comparison module compares and analyzes the real noise signal characteristics captured by the noise receiving device with the dynamically generated “second-order” characteristic data, so as to determine the noise source. The dynamic comparison mechanism based on environmental adaptation greatly improves the accuracy of identifying and matching the type of noise source in different and variable outdoor environments, and solves the problem of database comparison failure caused by environmental factors.

[0023] (3) The device of the present application has a compact overall structure, the core components are integrated in a light-weight dustproof box body, the folding support can be quickly and stably unfolded and folded through the fixed hinge joint, the first hinge rod, the second hinge rod and the hinge positioning device, provides stable support after unfolding, and has a small volume after folding, so that the device is convenient to carry and transport, the grooves on the support plate ensure stable installation of the device main body, the design of high integration and portability enables the device to be carried by a single person and quickly deployed and used on site, overcomes the shortcomings that fixed sites cannot be moved and large acoustic cameras are heavy, expensive and difficult to deploy, and is especially suitable for rapid tracking and positioning of sudden and mobile noise events. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a three-dimensional structure diagram of the present application.

[0025] Figure 2 Structure diagram of dustproof box body.

[0026] Figure 3 Structure diagram of noise isolation directional device.

[0027] Figure 4 Structure diagram of noise source reading assembly.

[0028] Figure 5 Structure diagram of noise source identification step.

[0029] [Main component symbol description of the invention]

[0030] 1-1, support plate; 1-2, fixed hinge joint; 1-3, first hinge rod;

[0031] 1-4, second hinge rod; 1-5, hinge positioning device; 2, dustproof box body;

[0032] 2-1, top cover; 2-2, bottom cover; 2-3, side dustproof net;

[0033] 3-1, first rotary motor; 3-2, sound insulation cylindrical sleeve; 3-3, noise directional hole;

[0034] 4-1, second rotary motor; 4-2, second rotary rod; 4-3, rotary disc;

[0035] 4-4, telescopic motor; 4-5, telescopic rod; 4-6, sound insulation arc plate;

[0036] 4-7, noise receiver. DETAILED DESCRIPTION

[0037] The present application provides a portable noise pollution source rapid identification equipment, in order to make the purpose, technical scheme and advantages of the present application more clear and clear, the following will be combined with specific examples, and referring to the drawings, the present application is further described in detail. DETAILED EMBODIMENTS

[0038] As Figures 1-5 shown, the present application provides a portable noise pollution source rapid identification equipment including folding support, dustproof box body 2, noise source reading assembly, noise isolation directional device, sound source identification assembly and environmental monitoring assembly, the dustproof box body 2 is fixedly installed above the folding support, the noise source reading assembly is installed inside the dustproof box body 2, the noise isolation directional device is sleeved on the outer circle of the noise source reading assembly, the sound source identification assembly, environmental monitoring assembly is arranged in the dustproof box body 2 and is electrically connected with the noise source reading assembly.

[0039] The dustproof box 2 is hollow cylindrical, the dustproof box 2 includes a top cover 2-1, a bottom cover 2-2, and a side dustproof net 2-3, the side dustproof net 2-3 is fixedly installed between the top cover 2-1 and the bottom cover 2-2, and the side dustproof net 2-3 is connected with the top cover 2-1 and the bottom cover 2-2 through buckling.

[0040] The noise isolation directional device includes a first rotary motor 3-1, a first rotary rod, and a sound insulation cylindrical sleeve 3-2, the sound insulation cylindrical sleeve 3-2 is arranged at a central position in the dustproof box 2, the first rotary motor 3-1 is fixedly installed on the bottom cover 2-2 of the dustproof box 2, an output end of the first rotary motor 3-1 is connected with the first rotary rod, the other end of the first rotary rod is connected with the bottom end of the sound insulation cylindrical sleeve 3-2, and a noise directional hole 3-3 is arranged on the side of the sound insulation cylindrical sleeve 3-2.

[0041] The noise source reading assembly includes a second rotary motor 4-1, a second rotary rod 4-2, a noise receiving device, and a rotary disc 4-3, the second rotary motor 4-1 is fixedly installed on the top of the dustproof box 2, the rotary disc 4-3 is arranged in the dustproof box 2, and two ends of the second rotary rod 4-2 are respectively connected with the output end of the second rotary motor 4-1 and the rotary disc 4-3; the noise receiving device is provided in multiple, and multiple noise receiving devices are arranged on the rotary disc 4-3.

[0042] The noise receiving device includes a telescopic motor 4-4, a telescopic rod 4-5, a sound insulation circular arc plate 4-6, and a noise receiving instrument 4-7, the telescopic motor 4-4 is fixedly installed on the rotary disc 4-3, two ends of the telescopic rod 4-5 are respectively connected with the noise receiving instrument 4-7 and the output end of the telescopic motor 4-4, the sound insulation circular arc plate 4-6 is fixedly installed on the telescopic rod 4-5 at the back side of the noise receiving instrument 4-7, the size of the sound insulation circular arc plate 4-6 is matched with the noise directional hole 3-3 on the side of the sound insulation cylindrical sleeve 3-2, an angle tilting device is arranged at the connection position of the noise receiving instrument 4-7 and the sound insulation circular arc plate 4-6, and the angle tilting device is used for controlling the change of the pitch angle of the noise receiving instrument 4-7.

[0043] The folding support comprises a support plate 1-1, a fixed hinge 1-2, a first hinge rod 1-3, a second hinge rod 1-4 and a hinge positioning device 1-5, the fixed hinge 1-2 is fixedly installed at the bottom of the support plate 1-1, the two ends of the first hinge rod 1-3 are connected with the fixed hinge 1-2 and the second hinge rod 1-4 respectively, and the hinge positioning device 1-5 is installed at the connection between the first hinge rod 1-3 and the fixed hinge 1-2 and the second hinge rod 1-4 and the first hinge rod 1-3. The central axes of the rotating disc 4-3, the sound insulation cylindrical sleeve 3-2 and the dustproof box 2 are on a straight line, the noise directional hole 3-3 is provided with only one, and the noise receiving device is provided with four groups. The support plate 1-1 is provided with a groove matched with the size of the dustproof box 2, and the dustproof box 2 is fixedly installed in the groove.

[0044] The sound source identification assembly comprises a sound source storage module, a sound source simulation module and a sound source comparison module, and the sound source storage module, the sound source simulation module and the sound source comparison module are electrically connected with the noise sound source reading assembly. The sound source storage module is used for storing the primary data of various noises, the sound source simulation module is used for simulating the secondary data of various noises in the current environment based on the primary data of noises, the sound source comparison module is used for comparing the real data of noises received by the noise sound source reading assembly with the secondary data of noises, and the environment monitoring assembly is used for monitoring the environment data of the device and transmitting the environment data to the sound source simulation module.

[0045] The sound source storage module is constructed with a multi-dimensional noise feature database, and the database stores the primary acoustic fingerprint data of typical noise pollution sources, including traffic noise (motor vehicle horn, engine roar, tire friction), industrial noise (mechanical equipment vibration, fan operation, stamping impact), construction noise (pile driver, concrete mixer, cutting machine) and social life noise (square dance sound, business promotion, catering exhaust); the primary data of each noise source includes time domain characteristics (sound pressure level envelope, pulse duration, repetition period), frequency domain characteristics (1 / 3 octave spectrum, characteristic frequency peak) and modulation characteristics (amplitude / frequency modulation mode).

[0046] The environment monitoring assembly comprises a temperature sensor, a humidity sensor, a wind speed and direction sensor for monitoring meteorological parameters, an atmospheric pressure sensor for monitoring space parameters and a low-frequency environmental vibration sensor for monitoring background noise, and the environment monitoring assembly transmits the real-time collected environment data set (temperature T, humidity H, wind speed Vw, air pressure P) to the sound source simulation module.

[0047] The sound source simulation module dynamically generates noise secondary data in the current environment based on the primary data and environmental parameters, and specifically calculates the current sound speed according to the real-time temperature T and humidity H:

[0048] (m / s); a sound propagation path attenuation model is constructed according to the wind speed VwVw and the wind direction, the refraction effect caused by the wind gradient is calculated, the air density is corrected in combination with the air pressure PP, and the atmospheric absorption attenuation coefficient is optimized.

[0049] The workflow of the sound source contrast module is as follows:

[0050] 1. Input: real-time noise signals (real data) obtained from the noise receiver 4-7; and the current environmental theoretical feature set (second-order data) output from the sound source simulation module.

[0051] 2. Feature extraction: the real-time noise signals are subjected to feature extraction (time domain, frequency domain, modulation domain) conforming to the first-order database.

[0052] 3. Dynamic matching analysis: a multi-feature weighted similarity algorithm (such as dynamic time warping DTW for time domain envelope and spectral correlation density SCD for frequency domain) is adopted to calculate the matching degree between the real data and the second-order data of each type of noise source; an environmental confidence factor is introduced to give adaptive weights to features (such as high-frequency attenuation) greatly affected by the environment.

[0053] 4. Decision output: if the matching degree of a certain type of noise source exceeds a preset threshold (such as > 85%), it is determined that the recognition is successful, and the noise source type label (such as "diesel generator") is output; if there are multiple sources superimposed, blind source separation preprocessing (such as independent component analysis ICA) is performed before matching, and the ordering of the main contributing sources is output.

[0054] Thus far, the present embodiment has been described in detail in combination with the drawings. Based on the above description, those skilled in the art should have a clear understanding of the present application.

[0055] It should be noted that the implementation modes not shown or described in the drawings or the specification are known to those skilled in the art, and are not described in detail. In addition, the definitions of the elements and methods described above are not limited to the various specific structures, shapes or modes mentioned in the embodiments.

[0056] It should also be noted that this document may provide demonstrations of parameters containing specific values, but these parameters do not need to be exactly equal to the corresponding values, but can be approximated to the corresponding values ​​within an acceptable error tolerance or design constraint. The directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", etc., are only reference to the directions of the accompanying drawings and are not intended to limit the scope of protection of the present invention. In addition, unless specifically described or the steps must occur in sequence, the order of the above steps is not limited to those listed above, and can be changed or rearranged according to the required design. And the above embodiments can be mixed and matched with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments.

[0057] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Portable noise pollution source rapid identification equipment, characterized by: It includes a folding bracket, a dustproof box, a noise source reading component, a noise isolation and orientation device, a sound source identification component and an environmental monitoring component. The dustproof box is fixedly installed above the folding bracket, the noise source reading component is installed inside the dustproof box, the noise isolation and orientation device is sleeved on the outer ring of the noise source reading component, the sound source identification component and the environmental monitoring component are arranged inside the dustproof box and electrically connected to the noise source reading component. The environmental monitoring component is used to monitor the environmental data of the equipment, and the environmental data include temperature, humidity, wind speed and air pressure data. The dustproof box is hollow cylindrical and includes a top cover, a bottom cover and a side dustproof net. The side dustproof net is fixedly installed between the top cover and the bottom cover, and the side dustproof net is connected to the top cover and the bottom cover by a snap.

2. The portable noise pollution source rapid identification device according to claim 1 is characterized in that: The noise isolation and directional device includes a first rotating motor, a first rotating rod, and a sound insulation cylindrical sleeve. The sound insulation cylindrical sleeve is arranged in the center position of the dustproof box. The first rotating motor is fixedly installed on the bottom cover of the dustproof box. The output end of the first rotating motor is connected to the first rotating rod. The other end of the first rotating rod is connected to the bottom end of the sound insulation cylindrical sleeve. A noise directional hole is provided on the side of the sound insulation cylindrical sleeve.

3. The portable noise pollution source rapid identification device according to claim 2 is characterized in that: The noise source reading component includes a second rotating motor, a second rotating rod, a noise receiving device and a rotating disc. The second rotating motor is fixedly mounted on the top of the dustproof box, the rotating disc is arranged inside the dustproof box, and the two ends of the second rotating rod are respectively connected to the output end of the second rotating motor and the rotating disc; there are multiple noise receiving devices, and the multiple noise receiving devices are arranged around the rotating disc.

4. The portable noise pollution source rapid identification device according to claim 3 is characterized in that: The noise receiving device includes a telescopic motor, a telescopic rod, a sound insulation arc plate and a noise receiver. The telescopic motor is fixedly mounted on the rotating disc. The two ends of the telescopic rod are respectively connected to the noise receiver and the output end of the telescopic motor. The sound insulation arc plate is fixedly mounted on the telescopic rod on the rear side of the noise receiver. The size of the sound insulation arc plate matches the noise directional hole on the side of the sound insulation cylindrical sleeve.

5. The portable noise pollution source rapid identification device according to claim 4 is characterized in that: An angle tilting device is provided at the connection between the noise receiver and the sound insulation arc plate, and the angle tilting device is used to control the change of the pitch angle of the noise receiver.

6. The portable noise pollution source rapid identification device according to claim 5, characterized in that: The folding bracket includes a support plate, a fixed hinge joint, a first hinge rod, a second hinge rod and a hinge positioning device. The fixed hinge joint is fixedly installed at the bottom of the support plate, and the two ends of the first hinge rod are respectively connected to the fixed hinge joint and the second hinge rod. The hinge positioning device is installed at the connection between the first hinge rod and the fixed hinge joint, and the second hinge rod and the first hinge rod.

7. The portable noise pollution source rapid identification device according to claim 6, characterized in that: The central axes of the rotating disc, the sound-isolating cylindrical sleeve and the dust-proof box are in a straight line, there is only one noise directional hole, and there are four groups of noise receiving devices in total.

8. The portable noise pollution source rapid identification device according to claim 6, characterized in that: The support plate is provided with a groove that matches the size of the dustproof box body, and the dustproof box body is fixedly installed inside the groove.

9. The portable noise pollution source rapid identification device according to claim 1, characterized in that: The sound source recognition component includes a sound source storage module, a sound source simulation module and a sound source comparison module. The sound source storage module, the sound source simulation module and the sound source comparison module are electrically connected to the noise sound source reading component.

10. The portable noise pollution source rapid identification device according to claim 9, characterized in that: The sound source storage module is used to store the primary data of various noises, the sound source simulation module simulates and generates the secondary data of various noises in the current environment based on the primary data of the noise, and the sound source comparison module is used to compare the real data of the noise received by the noise source reading component and the secondary data of the noise.

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