Debugging experience cabin and acquisition system of active noise reduction system

Abstract

The utility model provides a kind of debugging experience cabin and acquisition system of active noise reduction system, it is related to active noise reduction technical field, for the road noise of the active noise reduction system of vehicle and the debugging of engine active noise reduction program, the debugging experience cabin includes: anechoic chamber, the inside of the anechoic chamber is used to set the active noise reduction system;Sound field restoration system, the sound field restoration system is set in the anechoic chamber;Multiple sound generators, multiple the sound generator is set in the anechoic chamber;Multiple audio receivers, multiple the audio receiver is distributed on seat simulation rack, multiple the audio receiver is used to receive the noise emitted by the sound field restoration system and generate noise signal;Debugging controller, the debugging controller is connected with multiple audio receivers, vibration table and sound generator signal;It improves the debugging efficiency, easy to reach specified debugging standard, and easily user feels program optimization effect.

Description

Technical Field

[0001] This utility model belongs to the field of active noise cancellation technology, and more specifically, relates to a debugging and experience cabin and data acquisition system for an active noise cancellation system. Background Technology

[0002] Current mainstream automotive active noise cancellation technologies include Road Noise Cancellation (RNC) and Engine Noise Cancellation (ENC), both based on the principle of sound wave interference. They cancel out road noise and improve ride comfort by generating sound waves with the same frequency but opposite phase as road and engine noise inside the vehicle. However, the tuning and testing of RNC and ENC programs must be performed on a real vehicle. The tuning process and the assessment of actual effects are often affected by environmental factors such as time, road surface consistency, and weather, resulting in low efficiency and difficulty in meeting the required tuning standards.

[0003] This application aims to build an active noise reduction test chamber based on sound field restoration technology, so that the active noise reduction programs for road noise and engine that originally needed to be verified in actual vehicles can be completed in the test chamber, and users can easily experience the optimization effect of the programs. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of existing technologies by providing a testing and experience cabin for an active noise cancellation system. This solves the problem mentioned in the background art that the testing and experience of current active road noise cancellation and active engine noise cancellation programs must be carried out on an actual vehicle. The testing and experience of the programs are often affected by environmental factors such as the calibration time cycle, road surface consistency, and weather, resulting in low efficiency and difficulty in meeting the prescribed testing standards.

[0005] To achieve the above objectives, this utility model provides a debugging and experience cabin for an active noise cancellation system, used to debug the road noise and engine active noise cancellation programs of a vehicle's active noise cancellation system. The debugging and experience cabin includes:

[0006] An anechoic chamber, the interior of which is used to house the active noise reduction system;

[0007] A vehicle seat simulation platform is installed in the anechoic chamber;

[0008] A vibration table is installed at the bottom of the vehicle seat simulation platform. The vibration table is used to reproduce the vibration of the vehicle under different working conditions and generate vibration signals as noise reduction reference signals.

[0009] A sound field restoration system is installed in the anechoic chamber and around the vehicle seat simulation platform. The sound field restoration system is used to restore road noise and engine noise under different vehicle operating conditions.

[0010] Multiple sound wave generators are disposed in the anechoic chamber and around the vehicle seat simulation platform. The multiple sound wave generators are used to reproduce the door speakers of the vehicle and to emit sound waves to cancel out road noise and engine noise.

[0011] Multiple audio receivers are distributed on a vehicle seat simulation platform to simulate the position of a human ear. The multiple audio receivers are used to receive noise emitted by the sound field restoration system and generate noise signals.

[0012] A debugging controller is connected to multiple audio receivers, a vibration table, and a sound wave generator. The road noise and engine active noise reduction program of the debugging controller is debugged based on the noise signal and the vibration signal to generate active noise reduction control parameters.

[0013] Preferably, the vehicle seat simulation platform includes:

[0014] Platform;

[0015] The front seats and the rear seats are mounted on the top of the platform. Each of the front seats has an audio receiver built into its top, and each of the rear seats has an audio receiver built into its top.

[0016] Preferably, the sound field reproduction system includes:

[0017] Four mid-to-high frequency speakers are located at the front left, front right, rear left, and rear right positions of the vehicle seat simulation platform.

[0018] Two low-frequency speakers are located at the front and rear of the vehicle seat simulation platform.

[0019] A digital signal processing system, which is connected to four mid-to-high frequency audio signals and two low-frequency audio signals.

[0020] Preferably, the number of sound wave generators is five, of which four of the sound wave generators are mid-low frequency loudspeakers and are distributed at the left front, right front, left rear and right rear positions of the vehicle seat simulation platform, and one of the sound wave generators is a low frequency loudspeaker and is located at the rear of the vehicle seat simulation platform.

[0021] Preferably, the test experience chamber of the active noise cancellation system further includes five support frames, four of which are distributed at the left front, right front, left rear, and right rear positions of the vehicle seat simulation platform, four sound wave generators are respectively connected to four of the support frames, one of the support frames is located at the rear of the vehicle seat simulation platform, and one of the sound wave generators and the test controller are connected to one of the support frames.

[0022] Preferably, the support frame includes:

[0023] Base frame;

[0024] Two support columns are connected to the base frame at intervals;

[0025] A crossbeam, the two ends of which are respectively connected to the two support columns, and the sound wave generator is connected to the crossbeam.

[0026] Preferably, the audio receiver is a microphone.

[0027] Preferably, the vibration table is an electromagnetic vibration table.

[0028] Preferably, the anechoic chamber is a semi-anechoic chamber.

[0029] A data acquisition system is used to collect road noise and engine noise data and road noise and engine vibration data for application in a test and experience cabin for an active noise cancellation system. The data acquisition system includes:

[0030] Multiple artificial head binaural acquisition devices are respectively installed in multiple seat positions of the vehicle;

[0031] Multiple vibration sensors are arranged on the front suspension, rear suspension, and engine of the vehicle.

[0032] This invention provides a debugging experience chamber and data acquisition system for an active noise cancellation system. Its advantages are as follows: the vibration table in the debugging experience chamber is used to reproduce the vibration of a vehicle under different operating conditions and generate vibration signals as noise reduction reference signals; multiple sound wave generators are used to reproduce the vehicle's door speakers and to emit sound waves that cancel out road noise and engine noise; multiple audio receivers are used to receive noise emitted by the sound field restoration system and generate noise signals; the active noise cancellation program for the road noise and engine noise of the debugging controller is debugged based on the noise and vibration signals to generate active noise cancellation control parameters. Compared with the actual measurement of the actual vehicle controller, the effect of the debugged active noise cancellation control parameters brought into the actual vehicle controller is the actual noise reduction amount measured by the actual vehicle controller. This debugging experience chamber can shorten the calibration cycle of the active noise cancellation program for road noise and engine noise, allowing users to experience the active noise cancellation effect under different operating conditions and road surfaces in a fixed space, improving debugging efficiency, easily achieving the specified debugging standards, and allowing users to easily experience the program optimization effect.

[0033] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0034] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0035] Figure 1 A top view schematic diagram of a test experience cabin for an active noise cancellation system according to an embodiment of the present invention is shown;

[0036] Figure 2 A perspective view of a vehicle seat simulation platform for a test experience cabin of an active noise cancellation system according to an embodiment of the present invention is shown.

[0037] Figure 3 The three-dimensional structure of the support frame for a test experience cabin of an active noise cancellation system according to an embodiment of the present invention is shown. Figure 1 ;

[0038] Figure 4 The three-dimensional structure of the support frame for a test experience cabin of an active noise cancellation system according to an embodiment of the present invention is shown. Figure 2 ;

[0039] Figure 5 A layout diagram of a vibration sensor in a front suspension according to an embodiment of the present invention is shown.

[0040] Figure 6A layout diagram of a vibration sensor in the rear suspension of a data acquisition system according to an embodiment of the present invention is shown.

[0041] Figure 7 The diagram shows the layout of a vibration sensor in an engine according to an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Anechoic chamber; 2. Vehicle seat simulation test bench; 21. Test bench; 22. Front seat; 23. Rear seat; 3. Vibration table; 4. Sound wave generator; 5. Audio receiver; 6. Debugging controller; 7. Mid-high frequency audio system; 8. Low frequency audio system; 9. Digital signal processing system; 10. Support frame; 101. Base frame; 102. Support column; 103. Crossbeam; 11. Vibration sensor; 12. Front suspension; 13. Rear suspension; 14. Engine. Detailed Implementation

[0044] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0045] like Figure 1 As shown, this utility model provides a debugging and experience cabin for an active noise cancellation system, used to debug the road noise and engine active noise cancellation program of the vehicle's active noise cancellation system. The debugging and experience cabin includes:

[0046] Anechoic chamber 1, the interior of which is used to install an active noise reduction system;

[0047] The vehicle seat simulation test platform 2 is installed inside the anechoic chamber 1.

[0048] Vibration table 3 is set at the bottom of the vehicle seat simulation platform 2. Vibration table 3 is used to reproduce the vibration of the vehicle under different working conditions and generate vibration signals as noise reduction reference signals.

[0049] The sound field restoration system is set inside the anechoic chamber 1 and around the vehicle seat simulation platform 2. The sound field restoration system is used to restore the road noise and engine noise of the vehicle under different operating conditions.

[0050] Multiple sound wave generators 4 are installed inside the anechoic chamber 1 and around the vehicle seat simulation platform 2. The multiple sound wave generators 4 are used to reproduce the vehicle door speakers and to emit sound waves to cancel out road noise and engine noise.

[0051] Multiple audio receivers 5 are distributed on the vehicle seat simulation platform 2 to simulate the position of human ears. The multiple audio receivers 5 are used to receive noise emitted by the sound field restoration system and generate noise signals.

[0052] The debugging controller 6 is connected to multiple audio receivers 5, vibration table 3 and sound wave generator 4. The road noise and engine active noise reduction program of the debugging controller 6 is debugged based on noise signal and vibration signal to generate active noise reduction control parameters.

[0053] Specifically, to address the current issue that the debugging and testing of active noise cancellation programs for roads and engines both require on-vehicle testing, the debugging and testing are often affected by environmental factors such as calibration time, road surface consistency, and weather, resulting in low efficiency and difficulty in meeting the prescribed debugging standards. This application provides a debugging and testing chamber for an active noise cancellation system. The vibration table 3 in this chamber is used to reproduce the vibrations of the vehicle under different operating conditions and generate vibration signals as noise reduction reference signals. Multiple sound wave generators 4 are used to reproduce the vehicle's door speakers and to emit sound waves that cancel out road noise and engine noise. Multiple audio... Receiver 5 is used to receive noise emitted by the sound field restoration system and generate noise signals. The road noise and engine active noise reduction program of the debugging controller 6 is debugged based on noise and vibration signals to generate active noise reduction control parameters. Compared with the actual measurement of the actual vehicle controller, the effect of the debugged active noise reduction control parameters brought into the actual vehicle controller is the actual noise reduction amount of the actual vehicle controller. This debugging experience cabin can shorten the calibration cycle of the road noise and engine active noise reduction program, experience the active noise reduction effect of different working conditions and road surfaces in a fixed space, improve debugging efficiency, easily meet the specified debugging standards, and allow users to experience the program optimization effect.

[0054] The debugging controller 6 is a controller on the actual vehicle, applied in the anechoic chamber 1. The road noise and engine active noise reduction program of the debugging controller 6 is debugged based on noise signals and vibration signals in the same way as the controller on the actual vehicle. This application uses the existing vibration table 3 on the market to generate vibration signals, which is a conventional technical means.

[0055] like Figure 2 As shown, preferably, the vehicle seat simulation platform 2 includes:

[0056] Taiwan 21;

[0057] The front seats 22 and the rear seats 23 are located on the top of the platform 21. Each seat of the front seats 22 has an audio receiver 5 built into its top, and each seat of the rear seats 23 has an audio receiver 5 built into its top.

[0058] Specifically, each of the front seats 22 has a headrest with a built-in audio receiver 5.

[0059] Preferably, the sound field reproduction system includes:

[0060] Four mid-to-high frequency speakers 7 are located at the front left, front right, rear left, and rear right positions of the vehicle seat simulation platform 2.

[0061] Two low-frequency speakers 8 are located at the front and rear of the vehicle seat simulation platform 2.

[0062] Digital signal processing system 9 is connected to four mid-to-high frequency speakers 7 and two low-frequency speakers 8.

[0063] Specifically, the angles of the mid-high frequency speakers 7 and the low frequency speakers 8 toward the seats and their precise positions relative to the seats will be recalibrated each time road noise or engine noise is different. The mid-high frequency speakers 7 and the low frequency speakers 8 are used to play real vehicle road noise and engine noise.

[0064] Preferably, there are five sound wave generators 4, four of which are mid-low frequency speakers and are distributed at the front left, front right, rear left and rear right positions of the vehicle seat simulation platform 2, and one of which is a low frequency speaker and is located at the rear of the vehicle seat simulation platform 2.

[0065] Specifically, the spatial positions of the mid-low frequency speakers and low frequency speakers relative to the seats can be adjusted according to the actual relative positions of the entire vehicle.

[0066] Preferably, the test experience chamber for the active noise cancellation system also includes five support frames 10, four of which are distributed at the front left, front right, rear left, and rear right positions of the vehicle seat simulation platform 2. Four sound wave generators 4 are respectively connected to four of the support frames 10. One support frame 10 is located at the rear of the vehicle seat simulation platform 2, and one sound wave generator 4 and the test controller 6 are connected to one of the support frames 10.

[0067] Specifically, the support frame 10 is used to support the sound wave generator 4.

[0068] like Figure 3 and Figure 4 As shown, preferably, the support frame 10 includes:

[0069] Base frame 101;

[0070] Two support columns 102 are connected to the base frame 101 at intervals;

[0071] A crossbeam 103 is connected to two support columns 102 at both ends, and a sound wave generator 4 is connected to the crossbeam 103.

[0072] Specifically, the base frame 101, support column 102 and crossbeam 103 are all made of European standard 4040C aluminum alloy. The base frame 101 of the four support frames 10 is L-shaped, and the base frame 101 of one of the support frames 10 is straight. The bottom end of the support column 102 is connected to the base frame 101 by bolt assembly, and the crossbeam 103 is connected to the support column 102 by bolt assembly.

[0073] Preferably, the audio receiver 5 is a microphone.

[0074] Preferably, the vibration table 3 is an electromagnetic vibration table.

[0075] Preferably, the anechoic chamber 1 is a semi-anechoic chamber.

[0076] A data acquisition system is used to collect road noise and engine noise data and road noise and engine vibration data for application in a test and experience cabin for an active noise cancellation system. The data acquisition system includes:

[0077] Multiple artificial head binaural data acquisition devices are installed at multiple seat locations in the vehicle.

[0078] Multiple vibration sensors 11 are arranged on the front suspension 12, rear suspension 13 and engine 14 of the vehicle.

[0079] Specifically, the sound field restoration system receives and transmits road noise and engine noise data and road noise and engine vibration data. It is a conventional receiving and transmitting system on the market. By collecting the road noise or engine noise data of the whole vehicle, the sound field restoration system reproduces the road noise or engine noise data in the test experience cabin. The road noise (RNC) and engine active noise reduction (ENC) programs are then adjusted in the test experience cabin, allowing people sitting on the vehicle seat simulation test bench 2 to subjectively evaluate the optimization effect of road noise and engine noise.

[0080] Road noise and engine noise acquisition should utilize (e.g., an HMS artificial head binaural acquisition device) with a bandwidth of 12800Hz and a resolution of 1Hz to ensure high-precision noise acquisition and playback; road noise vibration acquisition should be set to a data acquisition bandwidth of 1024Hz and a resolution of 1Hz. Figure 5As shown, the test points for installing vibration sensors on the front suspension 12 must include the four front and rear steering knuckles, the left and right front suspension shock absorber bodies, the passive ends of the left and right front suspension shock absorber body mounting points, and the active and passive ends of the four bushing mounting points on the front suspension subframe; for example... Figure 6 As shown, the test points for installing vibration sensors on the rear suspension 13 must include the active ends of the left and right springs, the passive ends of the left and right spring-body attachment points of the rear suspension, the bodies of the left and right shock absorbers of the rear suspension, and the passive ends of the left and right shock absorber-body mounting points of the rear suspension; for example... Figure 7 As shown, the test points for the vibration sensors installed on engine 14 include the active and passive ends of each engine mount, and the data acquisition bandwidth is set to 1024Hz with a resolution of 1Hz.

[0081] In summary, when the active noise cancellation system of this application is used in the debugging experience chamber, the vibration table 3 is used to reproduce the vibration of the vehicle under different working conditions and generate vibration signals as noise reduction reference signals. Multiple sound wave generators 4 are used to reproduce the door speakers of the vehicle and to emit sound waves to cancel out road noise and engine noise. Multiple audio receivers 5 are used to receive the noise emitted by the sound field restoration system and generate noise signals. The road noise and engine active noise cancellation program of the debugging controller 6 is debugged based on the noise signal and vibration signal to generate active noise cancellation control parameters. Compared with the actual measurement of the actual vehicle controller, the effect of the debugged active noise cancellation control parameters brought into the actual vehicle controller is the actual noise reduction amount of the actual vehicle controller. This debugging experience chamber can shorten the calibration cycle of the road noise and engine active noise cancellation program, experience the active noise cancellation effect of different working conditions and road surfaces in a fixed space, improve debugging efficiency, easily meet the specified debugging standards, and make it easy for users to feel the program optimization effect.

[0082] Taking a certain pure electric vehicle as an example, the active noise reduction controller coefficients determined by the active noise reduction debugging based on the sound field restoration system and the debugging controller of the experience cabin show consistent active noise reduction performance on the actual vehicle.

[0083] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A testing and experience cabin for an active noise cancellation system, used to test road noise and engine active noise cancellation programs of a vehicle's active noise cancellation system, characterized in that, The commissioning experience cabin includes: An anechoic chamber, the interior of which is used to house the active noise reduction system; A vehicle seat simulation platform is installed in the anechoic chamber; A vibration table is installed at the bottom of the vehicle seat simulation platform. The vibration table is used to reproduce the vibration of the vehicle under different working conditions and generate vibration signals as noise reduction reference signals. A sound field restoration system is installed in the anechoic chamber and around the vehicle seat simulation platform. The sound field restoration system is used to restore road noise and engine noise under different vehicle operating conditions. Multiple sound wave generators are disposed in the anechoic chamber and around the vehicle seat simulation platform. The multiple sound wave generators are used to reproduce the door speakers of the vehicle and to emit sound waves to cancel out road noise and engine noise. Multiple audio receivers are distributed on a vehicle seat simulation platform to simulate the position of a human ear. The multiple audio receivers are used to receive noise emitted by the sound field restoration system and generate noise signals. A debugging controller is connected to multiple audio receivers, a vibration table, and a sound wave generator. The road noise and engine active noise reduction program of the debugging controller is debugged based on the noise signal and the vibration signal to generate active noise reduction control parameters.

2. The debugging and experience cabin for an active noise cancellation system according to claim 1, characterized in that, The vehicle seat simulation platform includes: Platform; The front seats and the rear seats are mounted on the top of the platform. Each of the front seats has an audio receiver built into its top, and each of the rear seats has an audio receiver built into its top.

3. The debugging and experience cabin for an active noise cancellation system according to claim 1, characterized in that, The sound field restoration system includes: Four mid-to-high frequency speakers are located at the front left, front right, rear left, and rear right positions of the vehicle seat simulation platform. Two low-frequency speakers are located at the front and rear of the vehicle seat simulation platform. A digital signal processing system, which is connected to four mid-to-high frequency audio signals and two low-frequency audio signals.

4. The debugging and experience cabin for an active noise cancellation system according to claim 1, characterized in that, The number of sound wave generators is five, four of which are mid-low frequency loudspeakers and are distributed at the front left, front right, rear left and rear right positions of the vehicle seat simulation platform, and one of the sound wave generators is a low frequency loudspeaker and is located at the rear of the vehicle seat simulation platform.

5. The debugging and experience cabin for an active noise cancellation system according to claim 4, characterized in that, The active noise cancellation system's testing and experience cabin also includes five support frames, four of which are distributed at the left front, right front, left rear, and right rear positions of the vehicle seat simulation platform. Four sound wave generators are respectively connected to four of the support frames, one of which is located at the rear of the vehicle seat simulation platform, and one of the sound wave generators and the testing controller are connected to one of the support frames.

6. The debugging and experience cabin for an active noise cancellation system according to claim 5, characterized in that, The support frame includes: Base frame; Two support columns are connected to the base frame at intervals; A crossbeam, the two ends of which are respectively connected to the two support columns, and the sound wave generator is connected to the crossbeam.

7. The debugging and experience cabin for an active noise cancellation system according to claim 1, characterized in that, The audio receiver is a microphone.

8. The debugging and experience cabin for an active noise cancellation system according to claim 1, characterized in that, The vibration table is an electromagnetic vibration table.

9. The debugging and experience cabin for an active noise cancellation system according to claim 1, characterized in that, The anechoic chamber is a semi-anechoic chamber.

10. A data acquisition system for acquiring road noise and engine noise data and road noise and engine vibration data, for application in the testing and experience cabin of the active noise reduction system according to any one of claims 1-9, characterized in that, The data acquisition system includes: Multiple artificial head binaural acquisition devices are respectively installed in multiple seat positions of the vehicle; Multiple vibration sensors are arranged on the front suspension, rear suspension, and engine of the vehicle.

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