Noise acquisition device

Abstract

The invention provides a noise acquisition device, which comprises an audio acquisition device used for acquiring audio data of a to-be-tested motor in a sound insulation environment; the posture adjusting mechanism is used for bearing and adjusting the posture of the to-be-tested motor and changing the gravity center position of the to-be-tested motor in the testing process so as to detect noise changes of the motor at different angles, and therefore problems possibly existing in the motor can be recognized; and the excitation module is used for applying external excitation to the to-be-tested motor in the testing process to promote impurities or defects in the motor to generate sound, so that the quality problem is exposed. According to the device, through a comprehensive test method combining sound collection, attitude adjustment and internal excitation, accurate collection and analysis of motor noise can be realized, manpower is effectively replaced, the detection efficiency and accuracy are improved, and the device is suitable for noise quality detection of the motor under different attitudes.

Description

Technical Field

[0001] The present invention relates to the field of motor detection, and in particular to a noise collection device. Background Art

[0002] In the current motor manufacturing and testing industry, the motor is the core driving component, and its quality directly affects the product performance and user experience. The noise generated by the motor during operation is not only an important indicator of motor quality, but also an intuitive reflection of whether there are abnormal noises, assembly problems, unqualified parts or electromagnetic interference inside the motor.

[0003] At present, most of the quality inspection methods for motor noise still rely on manual listening, that is, technicians directly listen to the noise of the motor when it is running, and judge whether the motor is qualified based on experience. This inspection method has serious limitations and risks:

[0004] First, human ears are easily fatigued when listening. Long-term listening work will lead to a decline in judgment and affect the accuracy of detection.

[0005] Secondly, manual judgment is subjective, and different people have different listening standards and judgment abilities, which can easily lead to inconsistent test results;

[0006] Finally, manual listening methods are unable to conduct quantitative analysis of noise, lack digital and objective judgment basis, and cannot effectively distinguish the types and causes of different noises, making it difficult to accurately locate and solve noise problems. Summary of the invention

[0007] The main purpose of the present invention is to provide a noise collection device to solve the problem of low accuracy of the method for detecting motor noise in the prior art.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a noise collection device, comprising: an audio collector, used to collect audio data; a posture adjustment mechanism, used to carry and adjust the posture of the motor to be tested, so as to change the center of gravity position of the motor to be tested during the test, and then detect the noise changes of the motor at different angles; an excitation module, used to apply external excitation to the motor to be tested during the test, so as to induce noise to be generated inside the motor to be tested.

[0009] Furthermore, the posture adjustment mechanism includes an inclination adjustment bracket and a module fixing plate, the module fixing plate is used to carry the motor to be tested, and the module fixing plate is rotatably connected relative to the inclination adjustment bracket through a pin assembly to achieve adjustment of the angle of the motor to be tested.

[0010] Furthermore, the pin assembly includes a first pin and a second pin, and the first pin and the second pin are arranged at both ends of the module fixing plate. The inclination adjustment bracket is provided with a positioning pin hole corresponding to the first pin and an arc-shaped pin hole corresponding to the second pin. A part of the first pin is inserted into the positioning pin hole, and a part of the second pin is inserted into the arc-shaped pin hole, so that the module fixing plate rotates around the first pin.

[0011] Furthermore, the inclination adjustment bracket includes two inclination adjustment plates arranged opposite to each other, and a first pin and a second pin are arranged on the opposite side edges of the module fixing plate; each inclination adjustment plate is provided with a positioning pin hole and an arc pin hole, a part of each first pin is inserted into the corresponding positioning pin hole, and a part of each second pin is inserted into the corresponding arc pin hole.

[0012] Furthermore, the posture adjustment mechanism also includes an angle adjustment module, which is respectively connected to the inclination adjustment bracket and the module fixing plate. At least part of the angle adjustment module is movably arranged to drive the module fixing plate to rotate relative to the inclination adjustment bracket to adjust the posture of the motor to be tested.

[0013] Furthermore, the angle adjustment module includes a linear motor, which is drive-connected to the module fixing plate to drive the module fixing plate to be connected relative to the inclination adjustment bracket to adjust the posture of the motor to be tested during the operation of the linear motor.

[0014] Furthermore, the angle adjustment module also includes a linear motor fixing frame, a linear motor push rod and a linear motor module bracket, the linear motor is installed on the linear motor fixing frame, the linear motor fixing frame is installed on the linear motor module bracket, the linear motor module bracket is installed on the module fixing plate, the output shaft of the linear motor is connected to the linear motor push rod, and the free end of the linear motor push rod is used to contact the inclination adjustment bracket.

[0015] Furthermore, the angle adjustment module includes a piston cylinder, which is respectively connected to the module fixing plate and the inclination adjustment bracket to adjust the posture of the motor to be tested during the extension and retraction of the piston cylinder.

[0016] Furthermore, the excitation module includes a vibration motor module, which is arranged at the bottom of the motor to be tested, and at least a part of the vibration motor module is movably arranged to cause noise to be generated inside the motor to be tested during the test process.

[0017] Furthermore, the vibration motor module includes a vibration motor and an eccentric wheel, the eccentric wheel is arranged on the output shaft of the vibration motor, and the vibration motor is installed on the posture adjustment mechanism to induce vibration inside the motor to be tested when the vibration motor drives the eccentric wheel to rotate.

[0018] Furthermore, the vibration motor module also includes a vibration motor fixing frame, the posture adjustment mechanism has a fixing fixture for carrying the motor to be tested, the vibration motor fixing frame is installed on the fixing fixture, and the vibration motor is installed on the vibration motor fixing frame.

[0019] Furthermore, the excitation module includes at least one electromagnetic vibrator, which is connected to the posture adjustment mechanism. The electromagnetic vibrator generates vibration at a predetermined frequency to drive the inside of the motor to be tested to generate noise.

[0020] Furthermore, the noise collection device also includes: a soundproof box, which is used to provide a closed test cavity, and has a test cavity, and the audio collector, the posture adjustment mechanism and the excitation module are all arranged in the test cavity.

[0021] Furthermore, the soundproof box has an openable and closable door, and / or the inner wall of the door is provided with sound-absorbing material.

[0022] Furthermore, the noise collection device also includes a suspension component, which is suspended on the sound insulation box, and the audio collector is installed at the free end of the suspension component; and / or there are multiple audio collectors, and the multiple audio collectors are used to be arranged around the motor to be tested.

[0023] Furthermore, the noise collection device also includes a control module, which includes a signal receiving unit, a data processing unit and a signal sending unit. The signal receiving unit is electrically connected to the excitation module to obtain the working status of the excitation module. The data processing unit is respectively connected to the signal receiving unit and the signal sending unit to receive the information obtained by the signal receiving unit and send it to the signal sending unit after processing. The signal sending unit is connected to the audio collector to send a start signal to the audio collector.

[0024] The noise collection device in the present application can accurately collect the noise data of the motor under different postures and working conditions by utilizing an audio collector, a posture adjustment mechanism and an excitation module, thereby solving the problem of low accuracy of the motor noise detection method in the prior art; especially in the quality control stage, by comparing the noise changes under different postures, potential structural problems or assembly defects inside the motor can be discovered in time, avoiding customer complaints and product repairs due to noise problems, and effectively reducing production costs and market risks; and in the design verification stage, the device can help the R&D team verify the rationality of the motor design solution, and by adjusting the working parameters of the excitation module, simulate the noise performance of the motor under various working conditions, providing strong data support for the optimal design of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 A schematic diagram showing the structure of an embodiment of a noise collection device according to the present invention is shown;

[0027] Figure 2 Shows Figure 1 A schematic diagram of the structure of the noise collection device including a soundproof box;

[0028] Figure 3 Shows Figure 1 A schematic diagram of the structure of the vibration motor module of the noise collection device; and

[0029] Figure 4 Shows Figure 1 Schematic diagram of the structure of the angle adjustment module of the noise collection device.

[0030] The above drawings include the following reference numerals:

[0031] 1. Soundproof box; 2. Audio collector; 3. Posture adjustment mechanism; 4. Excitation module; 5. Suspension components;

[0032] 11. Test chamber; 12. Chamber door;

[0033] 100. Motor to be tested; 35. Fixing tooling;

[0034] 31. Inclination adjustment bracket; 32. Module fixing plate;

[0035] 37. first pin; 38. second pin;

[0036] 311, inclination adjustment plate; 312, arc-shaped pin hole;

[0037] 33. Linear motor module; 331. Linear motor; 332. Linear motor fixing bracket; 333. Linear motor push rod; 334. Linear motor module bracket;

[0038] 34. Vibration motor module; 341. Vibration motor; 342. Vibration motor fixing bracket; 343. Eccentric wheel. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] The present invention provides a noise collection device, such as Figures 1 to 4As shown, the noise collection device includes: an audio collector 2 for collecting audio data; a posture adjustment mechanism 3 for carrying and adjusting the posture of the motor 100 to be tested, so as to change the center of gravity position of the motor 100 to be tested during the test, and then detect the noise changes of the motor at different angles; an excitation module 4 for applying external excitation to the motor 100 to be tested during the test, so as to induce the motor 100 to generate noise inside. Through such a design, the device can simulate various postures and working conditions of the motor in actual use, so as to more comprehensively evaluate the noise characteristics of the motor, and is suitable for scenes such as motor quality control, performance optimization and design verification.

[0041] The noise collection device in the present invention can accurately collect the noise data of the motor under different postures and working conditions by utilizing the audio collector 2, the posture adjustment mechanism 3 and the excitation module 4, thereby solving the problem of low accuracy of the method for detecting motor noise in the prior art; especially in the quality control stage, by comparing the noise changes under different postures, potential structural problems or assembly defects inside the motor can be discovered in time, avoiding customer complaints and product repairs due to noise problems, and effectively reducing production costs and market risks; and in the design verification stage, the device can help the R&D team verify the rationality of the motor design solution, and by adjusting the working parameters of the excitation module, simulate the noise performance of the motor under various working conditions, providing strong data support for the optimal design of the motor.

[0042] In one embodiment of the present invention, Figure 1 As shown, the posture adjustment mechanism 3 includes an inclination adjustment bracket 31 and a module fixing plate 32. The module fixing plate 32 is used to carry the motor to be tested 100. The module fixing plate 32 is rotatably connected to the inclination adjustment bracket 31 through a pin assembly to adjust the angle of the motor to be tested 100. This design allows the motor to be tested at different angles, simulating the noise performance of the motor at different installation positions, and is particularly suitable for motor testing in industries such as automobiles and home appliances.

[0043] Specifically, the excitation module 4 and the motor to be tested 100 are arranged on the module fixing plate 32 .

[0044] By testing the motor from multiple angles, we can have a more comprehensive understanding of the noise performance of the motor in the actual use environment, which is crucial to improving the user experience of the product. For example, in the automotive industry, the motor may be installed in different positions, such as the front, rear, bottom, etc., and its noise characteristics during operation will vary depending on the installation position. Through the combination of the inclination adjustment bracket 31 and the module fixing plate 32 of the device, these different installation conditions can be simulated, providing accurate data for the noise control of the motor. In the field of home appliances, such as motors in washing machines, air conditioners, and dryers, their vibration and noise during operation also need to consider their performance under different loads. The device can also simulate actual use scenarios by changing the motor posture and applying external excitation, providing strong technical support for improving the quality of home appliances.

[0045] In one embodiment of the present invention, Figure 1 As shown, the pin assembly includes a first pin 37 and a second pin 38, which are arranged at both ends of the module fixing plate 32, and a positioning pin hole corresponding to the first pin 37 and an arc-shaped pin hole 312 corresponding to the second pin 38 are arranged on the inclination adjustment bracket 31, a part of the first pin 37 is inserted into the positioning pin hole, and a part of the second pin 38 is inserted into the arc-shaped pin hole 312, so that the module fixing plate 32 rotates around the first pin 37. This arrangement of the pin assembly is simple and reliable, and can realize the precise adjustment of the motor posture, and is particularly suitable for occasions where the test angle needs to be finely controlled.

[0046] In one embodiment of the present invention, the inclination adjustment bracket 31 includes two inclination adjustment plates 311 arranged opposite to each other, and a first pin 37 and a second pin 38 are arranged on opposite sides of the module fixing plate 32; each inclination adjustment plate 311 is provided with a positioning pin hole and an arc-shaped pin hole 312, a part of each first pin 37 is inserted into the corresponding positioning pin hole, and a part of each second pin 38 is inserted into the corresponding arc-shaped pin hole 312. Such a design can provide more stable support and a wider angle adjustment range, and is suitable for large motors or occasions where noise testing needs to be performed at multiple angles.

[0047] Specifically, the module fixing plate 32 of the present invention is connected to the inclination adjustment bracket 31 through a first pin 37 and a second pin 38 that are partially penetrated through the two inclination adjustment plates 311 .

[0048] For some motor installation scenarios, the motor may be in different postures during actual operation due to changes in terrain or installation location, which has an important impact on the noise performance of the motor. The design of the inclination adjustment bracket 31 of the noise collection device can provide strong support and a wide angle adjustment range, ensuring the stability of the motor during the test and avoiding test errors caused by changes in the motor posture. This design can help engineers more accurately evaluate the noise characteristics of the motor in different working postures, and provide strong data support for noise control of large motors.

[0049] In one embodiment of the present invention, the posture adjustment mechanism 3 further includes an angle adjustment module 33, which is respectively connected to the inclination adjustment bracket 31 and the module fixing plate 32, and at least part of the angle adjustment module 33 is movably arranged to drive the module fixing plate 32 to rotate relative to the inclination adjustment bracket 31 to adjust the posture of the motor to be tested 100. Through the automated control of the angle adjustment module, the motor posture can be quickly and accurately adjusted, the test efficiency can be improved, and it is suitable for automated test production lines.

[0050] Specifically, the module fixing plate 32 rotates around the first pin 37 relative to the inclination adjustment bracket 31 .

[0051] In modern industrial production, the construction of automated test production lines is of great significance for improving production efficiency and product quality. The angle adjustment module of the noise collection device in the present invention realizes the rapid and accurate adjustment of the motor posture through automated control, greatly shortens the test preparation time, and improves the efficiency and accuracy of the test. This design is particularly suitable for batch testing in the motor production process, such as in automobile manufacturing and home appliance production lines. It can quickly perform multi-angle noise tests on batches of motors, timely discover and solve noise problems, ensure the factory quality of the products, reduce after-sales service costs, and provide strong technical support for the production management of enterprises.

[0052] In one embodiment of the present invention, the angle adjustment module 33 includes a linear motor 331, which is drivingly connected to the module fixing plate 32 and the inclination adjustment bracket 31 to drive the module fixing plate 32 to rotate relative to the inclination adjustment bracket 31 to adjust the posture of the motor 100 to be tested during the operation of the linear motor 331. The use of the linear motor 331 makes the angle adjustment process smoother, reduces the test error caused by vibration during the adjustment process, and is suitable for high-precision noise testing.

[0053] Specifically, the excitation module 4 , the motor to be tested 100 and the angle adjustment module 33 in the present invention are all arranged on the module fixing plate 32 .

[0054] Specifically, the angle adjustment module 33 of the present invention is connected to the inclination adjustment bracket 31 through a first pin 37 and a second pin 38 fixed on the module fixing plate 32. The angle adjustment module 33 drives the module fixing plate 32 with the first pin 37 as the center, and adjusts the angle of the module fixing plate 32 by rotating the second pin 38 on the arc pin hole 312, thereby adjusting the posture of the motor 100 to be tested installed on the module fixing plate 32.

[0055] Preferably, the configuration of the angle adjustment module 33 in the present invention can meet various test orientation requirements of the motor 100 to be tested.

[0056] As a high-precision drive device, the linear motor 331 is used in the angle adjustment module to make the adjustment of the motor posture smoother and more precise, avoiding the test error introduced by vibration during the adjustment process, and improving the accuracy and reliability of the noise test. This high-precision testing capability is particularly suitable for fields that require fine noise control, such as motor testing in precision instruments and high-end audio equipment. Through the precise control of the linear motor 331, the various posture changes of the motor in actual applications can be simulated more accurately, providing strong data support for the optimization of motor noise in these fields, and helping to improve the market competitiveness of the product.

[0057] In one embodiment of the present invention, Figure 4 As shown, the angle adjustment module 33 includes a linear motor fixing frame 332, a linear motor push rod 333 and a linear motor module bracket 334. The linear motor 331 is mounted on the linear motor fixing frame 332, the linear motor fixing frame 332 is mounted on the linear motor module bracket 334, the linear motor module bracket 334 is mounted on the module fixing plate 32, the output shaft of the linear motor 331 is connected to the linear motor push rod 333, and the free end of the linear motor push rod 333 is used to contact the inclination adjustment bracket 31. This structural design ensures the stability of the linear motor push rod 333 and the transmission efficiency of the thrust, and is suitable for the test environment where the angle needs to be adjusted frequently.

[0058] Specifically, the linear motor 331 is fixed on the module fixing plate 32 through the linear motor fixing frame 332 and the linear motor module bracket 334. The angle adjustment module 33 drives the linear motor 331 under the control of a predetermined motor program. Through the spiral structure inside the linear motor 331, the linear motor push rod 333 is extended and contacts with the bottom plate of the inclination adjustment bracket 31. At this time, the linear motor push rod 333 reacts to the inclination adjustment bracket 31, driving the module fixing plate 32 to rotate on the arc pin hole 312 with the first pin 37 as the center of the circle and through the second pin 38, so that the posture of the motor 100 to be tested fixed on the module fixing plate 32 changes accordingly.

[0059] Preferably, in the present invention, different rotation angles of the module fixing plate 32 around the first pin 37 can cause different changes in the posture of the motor 100 to be tested, causing an imbalance in the center of gravity of the motor 100 to be tested, and generating noises of different degrees.

[0060] The combined design of the linear motor fixing frame 332, the linear motor push rod 333 and the linear motor module bracket 334 in the present invention not only ensures the stability of the linear motor push rod 333 and the efficient transmission of thrust, but also improves the flexibility and adaptability of the entire test system. In the test environment, this structure can quickly respond to the adjustment requirements of the motor posture, especially in the automated test production line, it can achieve continuous and rapid adjustment of the motor posture, greatly improving the test efficiency. This design is particularly suitable for application scenarios where a large number of motors need to be tested for noise from multiple angles in a short period of time. For example, in the motor quality control of electric vehicles, the noise test of the motor in different installation positions can be completed in a short period of time, ensuring the driving experience and quietness of the electric vehicle, and helping to improve the market competitiveness of the product.

[0061] In another embodiment of the present invention, the angle adjustment module 33 includes a piston cylinder, which is respectively connected to the module fixing plate 32 and the inclination adjustment bracket 31 to adjust the posture of the motor 100 to be tested during the extension and retraction of the piston cylinder. The use of the piston cylinder provides a greater adjustment force and a wider adjustment range, which is suitable for noise testing of heavy motors.

[0062] Specifically, in one embodiment of the present invention, the cylinder body of the piston cylinder is fixed to the module fixing plate 32 through the linear motor module bracket 334. Under the drive of the piston cylinder, the piston rod of the piston cylinder extends out and contacts the bottom plate of the inclination adjustment bracket 31. At this time, the piston cylinder reacts to the inclination adjustment bracket 31, driving the module fixing plate 32 to move in the arc pin hole 312 with the first pin 37 as the center and the second pin 38 as the trajectory, so that the posture of the motor 100 to be tested fixed on the module fixing plate 32 changes accordingly.

[0063] Furthermore, as a powerful driving device, the piston cylinder is used in the angle adjustment module 33 to provide greater adjustment force and wider adjustment range, which is suitable for heavy motors or test environments that require large angle changes. In practical applications, such as motor testing in large ships and heavy machinery, the piston cylinder can ensure the stability of the motor when adjusting its posture, avoiding testing difficulties caused by insufficient adjustment force or limited adjustment range. Through the precise control of the piston cylinder, various posture changes of the motor in actual applications can be simulated more accurately, providing strong data support for motor noise control and optimization in these fields, helping to improve product safety and comfort, and meeting the needs of modern industry for high-precision and high-efficiency testing.

[0064] In one embodiment of the present invention, the excitation module 4 includes a vibration motor module 34, which is disposed at the bottom of the motor to be tested 100, and at least a portion of the vibration motor module 34 is movably disposed to cause noise to be generated inside the motor to be tested 100 during the test process. The vibration state of the motor in actual operation can be simulated by the excitation of the vibration motor module, which is suitable for evaluating the noise performance of the motor in a vibration environment.

[0065] The use of the vibration motor module 34 enables the test process to more realistically simulate the vibration state of the motor in actual operation, which is of great significance for evaluating the noise performance of the motor in a vibration environment. Especially in industrial equipment and mechanical equipment, the motor is often in a high-vibration operating environment, and its noise characteristics will be affected by vibration. Through the excitation of the vibration motor module 34, the vibration frequency and intensity of the motor can be accurately controlled, providing reliable data for testing the noise of the motor under different vibration conditions. This design is particularly suitable for noise testing of motors in industrial motors and heavy mechanical equipment. It can help engineers accurately evaluate the noise performance of motors in actual working environments and provide strong technical support for noise control and optimization of motors.

[0066] In one embodiment of the present invention, Figure 3 As shown, the vibration motor module 34 includes a vibration motor 341 and an eccentric wheel 343. The eccentric wheel 343 is arranged on the output shaft of the vibration motor 341. The vibration motor 341 is installed on the posture adjustment mechanism 3, so that when the vibration motor 341 drives the eccentric wheel 343 to rotate, the internal part of the motor 100 to be tested is vibrated. The use of the eccentric wheel 343 can generate stable periodic vibration, which helps to more accurately simulate the noise of the motor under specific working conditions, and is suitable for the internal structure optimization and noise control research of the motor.

[0067] The combined use of the eccentric wheel 343 and the vibration motor 341 in the present invention can produce stable periodic vibrations, providing precise control for testing the noise of the motor at a specific vibration frequency. This design is particularly suitable for the research on the optimization of the internal structure of the motor and noise control. For example, in the battery management system of an electric vehicle, the vibration and noise of the motor have an important impact on the stability and life of the entire system. Through the vibration motor module 34 of the present device, the vibration characteristics of the motor can be accurately controlled to simulate its noise performance in an actual working environment, providing strong technical support for optimizing the internal structure of the motor and improving the overall performance of the system. At the same time, this design is also helpful for noise testing of the motor under extreme conditions, such as high temperature, high altitude and other environments, providing key data for the environmental adaptability research of the motor.

[0068] In one embodiment of the present invention, Figure 3As shown, the vibration motor module 34 also includes a vibration motor fixing frame 342, the posture adjustment mechanism 3 has a fixing fixture 35 for carrying the motor 100 to be tested, the vibration motor fixing frame 342 is installed on the fixing fixture 35, and the vibration motor 341 is installed on the vibration motor fixing frame 342. Such a design ensures the stability and adjustability of the vibration motor, and is suitable for occasions where noise testing needs to be performed at different angles and under different vibration conditions.

[0069] Specifically, the fixing fixture 35 is designed as a V-shaped groove. During installation, the motor 100 to be tested is placed in the V-shaped groove to be naturally inserted.

[0070] The setting of the vibration motor fixing frame 342 in the present invention not only ensures the stability of the vibration motor 341 during the test, but also provides the adjustability of the vibration conditions, so that the test can adapt to various complex working scenarios. For example, in the motor test of unmanned vehicles such as drones and unmanned ships, the vibration and noise characteristics of the motor under different flight attitudes and sea conditions have an important impact on the stability and concealment of the vehicle. Through the vibration motor module 34 of the present device, noise testing can be carried out while simulating these actual conditions, providing key data for the optimized design of the motor of the unmanned vehicle. This design is particularly suitable for noise testing of motors in the field of unmanned vehicles, and can help engineers accurately evaluate the noise performance of motors in different working environments, providing a strong technical guarantee for improving the performance and competitiveness of unmanned vehicles.

[0071] In one embodiment of the present invention, the excitation module 4 includes at least one electromagnetic vibrator, which is connected to the posture adjustment mechanism 3, and the electromagnetic vibrator generates vibration at a predetermined frequency to drive the internal noise of the motor to be tested 100. The use of the electromagnetic vibrator can provide more accurate vibration frequency control, which is suitable for studying the noise characteristics of the motor at a specific frequency.

[0072] As a driving device that can accurately control the vibration frequency, the application of electromagnetic vibrator in the excitation module can provide more accurate data for the study of the noise characteristics of the motor at a specific frequency. In practical applications, such as in the aerospace field, the noise performance of the motor at different frequencies has an important impact on the comfort of the aircraft and the stability of the communication system. Through the precise control of the electromagnetic vibrator, the working state of the motor at a specific frequency can be simulated, providing stable and reliable test conditions for testing the noise characteristics of the motor at different frequencies. This design is particularly suitable for motor testing in the aerospace field, which can help engineers conduct in-depth research on the noise performance of the motor at a specific frequency, and provide strong data support for the noise control of the aircraft and the optimization design of the communication system.

[0073] like Figure 2As shown, the noise collection device further includes: a soundproof box 1 having a test cavity 11 , in which the audio collector 2 , the posture adjustment mechanism 3 and the excitation module 4 are all arranged.

[0074] Specifically, the soundproof box 1 has a box door 12 that can be opened and closed.

[0075] Specifically, the inner wall of the door 12 is provided with sound absorbing material.

[0076] Furthermore, the design of the soundproof box 1 can effectively isolate external noise and provide a closed and quiet test environment. By arranging sound-absorbing materials on the inner wall of the box door 12, possible reflected sound waves are further absorbed to ensure that the noise level inside the test cavity 11 is as low as possible, thereby improving the accuracy and reliability of the data collected by the audio collector 2.

[0077] Specifically, the provision of the box door 12 facilitates the installation and removal of the motor, and the provision of the sound-absorbing material reduces the reverberation time inside the test chamber 11, thereby avoiding the influence of sound reflection on the test results.

[0078] Preferably, the sound absorbing material of the door 12 of the present invention is one or more of polyurethane foam and glass wool.

[0079] In one embodiment of the present invention, the noise collection device further includes a suspension component 5, the suspension component 5 is suspended on the soundproof box 1, and the audio collector 2 is installed at the free end of the suspension component 5; and / or there are multiple audio collectors 2, and the multiple audio collectors 2 are arranged around the motor to be tested 100. The design of the suspension component reduces mechanical interference during the test process, and the use of multiple audio collectors 2 can collect noise data from different directions, which is suitable for occasions where a comprehensive evaluation of motor noise characteristics is required.

[0080] Preferably, the combined use of the suspension component 5 and multiple audio collectors 2 not only reduces mechanical interference, but also can collect noise data from multiple angles, providing strong technical support for comprehensively evaluating the noise characteristics of the motor in different directions. In practical applications, such as in the motor noise test of smart homes and high-end audio equipment, the noise performance of the motor is not only affected by its working state, but also related to factors such as the installation position and running direction. Through the use of the suspension component 5 and multiple audio collectors 2 of this device, various installation conditions of the motor in actual use can be simulated, and noise data can be collected from different directions, providing accurate data for comprehensively evaluating the noise characteristics of the motor. This design is particularly suitable for motor testing in the fields of smart homes and high-end audio equipment, and can help engineers accurately evaluate the noise performance of the motor in different directions, providing strong technical support for improving the quietness and user experience of the product.

[0081] Preferably, the noise collection device of the present invention also includes a control module, which includes a signal receiving unit, a data processing unit and a signal sending unit. The signal receiving unit is electrically connected to the excitation module 4 to obtain the working status of the excitation module 4. The data processing unit is respectively connected to the signal receiving unit and the signal sending unit to receive the information obtained by the signal receiving unit and send it to the signal sending unit after processing. The signal sending unit is connected to the audio collector 2 to send a start signal to the audio collector 2.

[0082] The noise collection device of the present invention can intelligently and accurately control the start-up time of the audio collector 2 according to the working state of the excitation module 4, ensure that the noise data is collected at the angle with the strongest motor noise intensity, so as to realize the efficient detection and evaluation of the internal structural problems of the motor. Specifically, when the motor 100 to be tested is adjusted to the optimal test position by the posture adjustment mechanism-this position is determined as the angle of the noise intensity peak based on the collection and analysis of a large number of motor noise samples in the early stage-the signal receiving unit in the control module immediately captures the real-time state information of the excitation module 4, and the data processing unit analyzes and judges based on this, accurately determines the optimal start-up time of the audio collector 2, and the sending unit sends a start instruction to the audio collector 2 according to the data processing result, so as to realize the efficient collection of noise data. Subsequently, the collected noise data is deeply analyzed in the computer background, including spectrum analysis, noise source location, etc., and finally an objective judgment of the motor quality is given, which effectively replaces the manual listening judgment, greatly improves the accuracy and efficiency of noise testing, and provides solid data support for the quality control, performance optimization and design verification of the motor.

[0083] The noise collection device provided by the present invention can not only simulate various postures and working conditions of the motor in actual use, but also can generate noise inside the motor through external excitation, so as to more comprehensively and accurately evaluate the noise performance of the motor under various working conditions. Its modular design and automated control function make the testing process more efficient and accurate, and it is suitable for multiple stages such as initial verification of motor design, quality control in the production process, and performance optimization before the product is launched. The device has broad application prospects in multiple fields such as automobiles, home appliances, aerospace, and industrial manufacturing. It can help engineers quickly locate and solve noise problems and enhance the user experience and market competitiveness of products. Especially in emerging fields such as electric vehicles and drones that have strict requirements for noise control, the device can play an important role in helping companies improve product quality and meet consumers' demand for low noise and high comfort.

[0084] The noise collection device provided by the present invention, with its unique modular design and powerful automatic control function, not only plays an important role in the traditional automobile and home appliance fields, but also shows great application potential in emerging electric vehicles, drones, smart homes and other fields. In the field of electric vehicles, the noise control of the motor is a key factor in improving the driving experience and the quietness of the vehicle. This device can simulate the actual working conditions of the motor in the electric vehicle, including different driving postures and vibration states, and provide accurate data support for the noise optimization design of the electric vehicle motor. In the field of drones, the vibration and noise of the motor have an important impact on the flight stability and concealment of the drone. By simulating the actual working conditions of the motor in the drone, this device can help engineers accurately evaluate the noise performance of the motor, and provide a strong technical guarantee for the noise control and flight performance optimization of the drone.

[0085] In addition, in the field of smart home, the quietness of the motor directly affects the user experience and market competitiveness of the product. This device can simulate the working state of the motor in different home environments and provide accurate data for the motor noise control of smart home products. In short, the noise collection device of the present invention, with its comprehensive testing capabilities and accurate data collection, can help engineers quickly locate and solve noise problems in multiple fields, improve the user experience and market competitiveness of the product, and provide strong technical support for the company's technological innovation and product upgrades.

[0086] The benefits of the present invention are as follows: on the one hand, the noise collection device of the present invention can completely replace the manual sound collection work and can completely prevent the hidden dangers of manual subjective fault identification; on the other hand, the present invention can effectively identify the hidden dangers of the motor caused by impurities in the motor.

[0087] The improvements of the present invention are as follows:

[0088] 1. Place the motor 100 to be tested horizontally on a fixed fixture 35, and place a vibration motor module 34 at the bottom to force the internal impurities of the motor 100 to produce noise through vibration, thereby exposing the quality problem;

[0089] 2. The motor 100 to be tested can be started at a certain tilt angle. The center of gravity is different at different angles, so the intensity of the noise varies. The posture with the strongest intensity is the best test angle.

[0090] A noise collection device of the present invention includes: an audio collector 2, which is used to collect audio data; a posture adjustment mechanism 3, which is used to carry and adjust the posture of a motor 100 to be tested, so as to change the center of gravity position of the motor 100 to be tested during the test, and then detect the noise changes of the motor at different angles; an excitation module 4, which is used to apply external excitation to the motor 100 to be tested during the test, so as to induce noise to be generated inside the motor 100 to be tested.

[0091] It can be seen that the noise collection device in the present invention can accurately collect the noise data of the motor under different postures and working conditions by utilizing the audio collector 2, the posture adjustment mechanism 3 and the excitation module 4, thereby solving the problem of low accuracy of the motor noise detection method in the prior art; especially in the quality control stage, by comparing the noise changes under different postures, the potential structural problems or assembly defects inside the motor can be discovered in time, avoiding customer complaints and product repairs due to noise problems, and effectively reducing production costs and market risks; and in the design verification stage, the device can help the R&D team verify the rationality of the motor design solution, and by adjusting the working parameters of the excitation module, simulate the noise performance of the motor under various working conditions, providing strong data support for the optimal design of the motor.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A noise collection device, characterized in that: include: An audio collector (2), used for collecting audio data; A posture adjustment mechanism (3) is used to carry and adjust the posture of the motor to be tested (100) so as to change the center of gravity position of the motor to be tested (100) during the test process, thereby detecting noise changes of the motor at different angles; The excitation module (4) is used to apply external excitation to the motor to be tested (100) during the test process, so as to cause noise to be generated inside the motor to be tested (100).

2. The noise collection device according to claim 1, characterized in that: The posture adjustment mechanism (3) comprises an inclination adjustment bracket (31) and a module fixing plate (32), wherein the module fixing plate (32) is used to carry the motor to be tested (100), and the module fixing plate (32) is rotatably connected to the inclination adjustment bracket (31) via a pin assembly to achieve adjustment of the angle of the motor to be tested (100).

3. The noise collection device according to claim 2, characterized in that: The pin assembly comprises a first pin (37) and a second pin (38), wherein the first pin (37) and the second pin (38) are arranged at two ends of the module fixing plate (32), and the inclination adjustment bracket (31) is provided with a positioning pin hole corresponding to the first pin (37) and an arc-shaped pin hole (312) corresponding to the second pin (38), a part of the first pin (37) is inserted into the positioning pin hole, and a part of the second pin (38) is inserted into the arc-shaped pin hole (312), so that the module fixing plate (32) rotates around the first pin (37).

4. The noise collection device according to claim 3, characterized in that: The inclination adjustment bracket (31) comprises two inclination adjustment plates (311) arranged opposite to each other, and the first pin (37) and the second pin (38) are arranged on opposite sides of the module fixing plate (32); each of the inclination adjustment plates (311) is provided with the positioning pin hole and the arc-shaped pin hole (312), and a part of each of the first pins (37) is inserted into the corresponding positioning pin hole, and a part of each of the second pins (38) is inserted into the corresponding arc-shaped pin hole (312).

5. The noise collection device according to claim 2, characterized in that: The posture adjustment mechanism (3) further comprises an angle adjustment module (33), wherein the angle adjustment module (33) is respectively connected to the inclination adjustment bracket (31) and the module fixing plate (32), and at least a portion of the angle adjustment module (33) is movably arranged to drive the module fixing plate (32) to rotate relative to the inclination adjustment bracket (31) to adjust the posture of the motor to be tested (100).

6. The noise collection device according to claim 5, characterized in that: The angle adjustment module (33) comprises a linear motor (331), and the linear motor (331) is drivingly connected to the module fixing plate (32) to drive the module fixing plate (32) to rotate relative to the inclination adjustment bracket (31) to adjust the posture of the motor to be tested (100) during the operation of the linear motor (331).

7. The noise collection device according to claim 6, characterized in that: The angle adjustment module (33) further comprises a linear motor fixing frame (332), a linear motor push rod (333) and a linear motor module bracket (334); the linear motor (331) is mounted on the linear motor fixing frame (332); the linear motor fixing frame (332) is mounted on the linear motor module bracket (334); the linear motor module bracket (334) is mounted on the module fixing plate (32); the output shaft of the linear motor (331) is connected to the linear motor push rod (333); and the free end of the linear motor push rod (333) is used to contact the inclination adjustment bracket (31).

8. The noise collection device according to claim 5, characterized in that: The angle adjustment module (33) comprises a piston cylinder, which is respectively connected to the module fixing plate (32) and the inclination adjustment bracket (31) so as to adjust the posture of the motor to be tested (100) during the extension and retraction process of the piston cylinder.

9. The noise collection device according to claim 1, characterized in that: The excitation module (4) comprises a vibration motor module (34), the vibration motor module (34) being arranged at the bottom of the motor to be tested (100), and at least a portion of the vibration motor module (34) being movably arranged to cause the motor to be tested (100) to generate noise inside during a test process.

10. The noise collection device according to claim 9, characterized in that: The vibration motor module (34) comprises a vibration motor (341) and an eccentric wheel (343); the eccentric wheel (343) is arranged on the output shaft of the vibration motor (341); and the vibration motor (341) is mounted on the posture adjustment mechanism (3) so as to induce vibration inside the motor (100) to be tested when the vibration motor (341) drives the eccentric wheel (343) to rotate.

11. The noise collection device according to claim 10, characterized in that: The vibration motor module (34) further comprises a vibration motor fixing frame (342), the posture adjustment mechanism (3) comprises a fixing fixture (35) for carrying the motor to be tested (100), the vibration motor fixing frame (342) is mounted on the fixing fixture (35), and the vibration motor (341) is mounted on the vibration motor fixing frame (342).

12. The noise collection device according to claim 1, characterized in that: The excitation module (4) comprises at least one electromagnetic vibrator, which is connected to the posture adjustment mechanism (3). The electromagnetic vibrator generates vibration at a predetermined frequency to drive the inside of the motor (100) to generate noise.

13. The noise collection device according to any one of claims 1 to 12, characterized in that: The noise collection device also includes: The soundproof box (1) has a test chamber (11), wherein the audio collector (2), the posture adjustment mechanism (3) and the excitation module (4) are all arranged in the test chamber (11).

14. The noise collection device according to claim 13, characterized in that: The soundproof box (1) has an openable and closable door (12); and / or The inner wall of the box door (12) is provided with sound absorbing material.

15. The noise collection device according to any one of claims 13, characterized in that: The noise collection device further comprises a suspension component (5), wherein the suspension component (5) is suspended on the sound insulation box (1), and the audio collector (2) is mounted on a free end of the suspension component (5); and / or There are a plurality of audio collectors (2), and the plurality of audio collectors (2) are arranged around the motor (100) to be tested.

16. The noise collection device according to any one of claims 1 to 12, characterized in that: The noise collection device further comprises a control module, the control module comprising a signal receiving unit, a data processing unit and a signal sending unit, the signal receiving unit being electrically connected to the excitation module (4) to obtain the working state of the excitation module (4), the data processing unit being respectively connected to the signal receiving unit and the signal sending unit to receive information obtained by the signal receiving unit and send the information to the signal sending unit after processing, and the signal sending unit being connected to the audio collector (2) to send a start signal to the audio collector (2).

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