Methods, systems, apparatus, processors, and computer-readable media of anti-jamming multi-channel horn synchronization stability test

Abstract

The present application relates to a kind of anti-interference multi-channel horn synchronous stability test method, comprising the following steps: host computer sends function trigger instruction to the horn of measured DUT, executes preset sound function, and generates mechanical vibration;Vibration acceleration sensor detects the mechanical vibration situation of the horn of measured DUT;Multi-channel data acquisition card collects the analog voltage signal synchronization of each channel;Host computer processes and analyzes the voltage signal of each channel received, judges the sound stability of the horn of each channel measured DUT.Using the anti-interference multi-channel horn synchronous stability test method, system, device, processor and computer readable storage medium thereof of the present application, multi-channel horn can be tested simultaneously in a space, the cost is also lower, has strong practical value.The present application can resist environmental sound interference, multi-channel can be tested simultaneously, occupies smaller volume and is not connected to network, and can be used for the sound strategy and function of stable measurement system.

Description

Technical Field

[0001] This invention relates to the field of automotive electronic domain control, and more particularly to the field of automated testing of cockpit systems. Specifically, it relates to a method, system, device, processor, and computer-readable storage medium for anti-interference multi-channel horn synchronization stability testing. Background Technology

[0002] With the development of automotive electronic domain control, the entertainment features of smart cockpits are becoming increasingly popular and frequently used in vehicles. System audio is a crucial means of entertainment and human-computer interaction, and systems typically have multiple speakers, with some functions sharing some speakers at different times. In system stress testing, multiple test benches are usually placed together, and external environmental noise inevitably affects each other. There are currently two methods for audio testing. 1. One option is a pickup design: For multi-speaker setups, each speaker needs its own independent space for isolation. It requires a relatively large space, good sound insulation, and audio analysis software.

[0003] 2. Another approach is to use a direct load instead of a speaker to directly capture the audio output and perform audio analysis. This method can isolate ambient noise, but requires audio analysis software. Audio algorithm analysis software is generally deployed in the cloud and requires an internet connection to use, making it unsuitable for stress testing benches with limited budgets and no external internet access. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method, system, device, processor and computer-readable storage medium for multi-channel loudspeaker synchronization stability testing that meets the requirements of good stability, low cost and wide applicability.

[0005] To achieve the above objectives, the present invention provides a method, system, apparatus, processor, and computer-readable storage medium for anti-interference multi-channel loudspeaker synchronization stability testing, as follows: The main feature of this method for testing the synchronization stability of a multi-channel loudspeaker against interference is that the method includes the following steps: (1) Install vibration acceleration sensors, connect the signal output terminals of each vibration acceleration sensor to the corresponding acquisition channel of the multi-channel data acquisition card, and connect the multi-channel data acquisition card to the host computer for communication. (2) The host computer sends a function trigger command to the speaker of the DUT under test, controls the speaker of the DUT under test to execute the preset sound function and generate mechanical vibration; (3) The vibration acceleration sensor detects the mechanical vibration of the DUT speaker under test and converts it into a standard analog voltage signal; (4) The multi-channel data acquisition card collects the analog voltage signals of each channel synchronously and transmits the collected signals to the host computer in real time; (5) The host computer processes and analyzes the received voltage signals of each channel to determine the sound stability of the DUT speaker in each channel.

[0006] Preferably, step (4) further includes the following steps: Before acquiring analog voltage signals, the multi-channel data acquisition card first amplifies and filters the signals, and then transmits the conditioned signals to the host computer.

[0007] Preferably, in step (5), the host computer processes and analyzes the received voltage signals from each channel, including qualitative judgment and quantitative analysis. The aforementioned qualitative judgment specifically refers to: By comparing the parameters of the voltage signal with a preset threshold, it is determined whether the speaker under test (DUT) produces mechanical vibration, and thus whether the speaker produces sound. The quantitative analysis mentioned above specifically includes: Frequency domain analysis is performed on the voltage signal to extract the amplitude and frequency characteristic parameters of the signal, and to evaluate whether the intensity and frequency of the sound emitted by the speaker of the DUT under test meet the preset expectations.

[0008] Preferably, the installation of vibration acceleration sensors in step (1) specifically involves installing vibration acceleration sensors on the frame, diaphragm, or components rigidly connected to the diaphragm of the DUT speaker in each channel; the components rigidly connected to the diaphragm include at least one of the speaker cone and dust cover.

[0009] Preferably, the vibration acceleration sensor is a MEMS accelerometer, the frequency of the standard analog voltage signal output by the MEMS accelerometer corresponds to the frequency of the mechanical vibration of the DUT speaker under test, and the amplitude of the voltage signal corresponds to the intensity of the mechanical vibration of the DUT speaker under test.

[0010] Preferably, step (2) or (4) further includes the following step: Synchronous triggering and synchronous signal acquisition are performed on multiple speakers in multiple devices under test to achieve simultaneous testing of multiple channels of speakers.

[0011] The main feature of this anti-interference multi-channel loudspeaker synchronization stability test system is that the system includes: The testing system consists of a host computer, a multi-channel data acquisition card, and at least one vibration acceleration sensor. The vibration acceleration sensor is installed on the frame, diaphragm, or a component rigidly connected to the diaphragm of the DUT speaker under test, and is used to detect the mechanical vibration of the DUT speaker under test and convert it into a standard analog voltage signal. The multi-channel data acquisition card is communicatively connected to the signal output terminal of the vibration acceleration sensor to acquire analog voltage signals and transmit the acquired signals to the host computer. The host computer is connected to the multi-channel data acquisition card for sending function trigger commands to the speaker under test (DUT), receiving signals transmitted by the multi-channel data acquisition card and processing and analyzing them to determine the sound stability of each channel of the DUT speaker.

[0012] Preferably, the vibration acceleration sensor is a MEMS accelerometer, and the number of vibration acceleration sensors matches the number of channels of the DUT speaker under test, for synchronous detection of vibration signals of multiple channels of the DUT speaker under test.

[0013] The main feature of this anti-interference multi-channel loudspeaker synchronization stability testing device is that the device includes: A processor is configured to execute computer-executable instructions; The memory stores one or more computer-executable instructions, which, when executed by the processor, implement the various steps of the above-described method for anti-interference multi-channel speaker synchronization stability testing.

[0014] The processor for the anti-interference multi-channel speaker synchronization stability test is characterized in that the processor is configured to execute computer-executable instructions, and when the computer-executable instructions are executed by the processor, the various steps of the above-mentioned anti-interference multi-channel speaker synchronization stability test method are implemented.

[0015] The computer-readable storage medium is characterized in that it stores a computer program that can be executed by a processor to implement the various steps of the above-described method for anti-interference multi-channel speaker synchronization stability testing.

[0016] The present invention employs a method, system, apparatus, processor, and computer-readable storage medium for anti-interference multi-channel speaker synchronous stability testing. Using existing DUT speakers, it simulates the actual operating conditions of the system, enabling simultaneous testing of multiple channels of speakers in a single space. It also boasts low cost and strong practical value. This invention is resistant to environmental sound interference, allows for simultaneous testing of multiple channels, occupies a small footprint, and does not require network connection. It can be used to stably test the sound strategies and functions of a system. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the system for testing the anti-interference multi-channel loudspeaker synchronization stability according to the present invention.

[0018] Figure 2 This is a flowchart of the method for testing the anti-interference multi-channel speaker synchronization stability according to the present invention. Detailed Implementation

[0019] To more clearly describe the technical content of the present invention, the following description is provided in conjunction with specific embodiments.

[0020] The method for testing the anti-interference synchronization stability of a multi-channel speaker using the above-described system, as described in this invention, includes the following steps: (1) Install vibration acceleration sensors, connect the signal output terminals of each vibration acceleration sensor to the corresponding acquisition channel of the multi-channel data acquisition card, and connect the multi-channel data acquisition card to the host computer for communication. (2) The host computer sends a function trigger command to the speaker of the DUT under test, controls the speaker of the DUT under test to execute the preset sound function and generate mechanical vibration; (3) The vibration acceleration sensor detects the mechanical vibration of the DUT speaker under test and converts it into a standard analog voltage signal; (4) The multi-channel data acquisition card collects the analog voltage signals of each channel synchronously and transmits the collected signals to the host computer in real time; (5) The host computer processes and analyzes the received voltage signals of each channel to determine the sound stability of the DUT speaker in each channel.

[0021] In a preferred embodiment of the present invention, step (4) further includes the following steps: Before acquiring analog voltage signals, the multi-channel data acquisition card first amplifies and filters the signals, and then transmits the conditioned signals to the host computer.

[0022] In a preferred embodiment of the present invention, in step (5), the host computer processes and analyzes the received voltage signals from each channel, including qualitative judgment and quantitative analysis. The aforementioned qualitative judgment specifically refers to: By comparing the parameters of the voltage signal with a preset threshold, it is determined whether the speaker under test (DUT) produces mechanical vibration, and thus whether the speaker produces sound. The quantitative analysis mentioned above specifically includes: Frequency domain analysis is performed on the voltage signal to extract the amplitude and frequency characteristic parameters of the signal, and to evaluate whether the intensity and frequency of the sound emitted by the speaker of the DUT under test meet the preset expectations.

[0023] As a preferred embodiment of the present invention, the installation of vibration acceleration sensors in step (1) specifically involves installing vibration acceleration sensors on the frame, diaphragm, or components rigidly connected to the diaphragm of the DUT speaker in each channel; the components rigidly connected to the diaphragm include at least one of the speaker cone and dust cover.

[0024] In a preferred embodiment of the present invention, the vibration acceleration sensor is a MEMS accelerometer. The frequency of the standard analog voltage signal output by the MEMS accelerometer corresponds to the frequency of the mechanical vibration of the DUT speaker under test, and the amplitude of the voltage signal corresponds to the intensity of the mechanical vibration of the DUT speaker under test.

[0025] In a preferred embodiment of the present invention, step (2) or (4) further includes the following step: Synchronous triggering and synchronous signal acquisition are performed on multiple speakers in multiple devices under test to achieve simultaneous testing of multiple channels of speakers.

[0026] The system for anti-interference multi-channel speaker synchronization stability testing of the present invention, wherein the system comprises: The testing system consists of a host computer, a multi-channel data acquisition card, and at least one vibration acceleration sensor. The vibration acceleration sensor is installed on the frame, diaphragm, or a component rigidly connected to the diaphragm of the DUT speaker under test, and is used to detect the mechanical vibration of the DUT speaker under test and convert it into a standard analog voltage signal. The multi-channel data acquisition card is communicatively connected to the signal output terminal of the vibration acceleration sensor to acquire analog voltage signals and transmit the acquired signals to the host computer. The host computer is connected to the multi-channel data acquisition card for sending function trigger commands to the speaker under test (DUT), receiving signals transmitted by the multi-channel data acquisition card and processing and analyzing them to determine the sound stability of each channel of the DUT speaker.

[0027] In a preferred embodiment of the present invention, the vibration acceleration sensor is a MEMS accelerometer, and the number of vibration acceleration sensors is matched with the number of channels of the DUT speaker under test, so as to synchronously detect the vibration signals of the multi-channel DUT speaker under test.

[0028] The apparatus for anti-interference multi-channel speaker synchronization stability testing of the present invention includes: A processor is configured to execute computer-executable instructions; The memory stores one or more computer-executable instructions, which, when executed by the processor, implement the various steps of the above-described method for anti-interference multi-channel speaker synchronization stability testing.

[0029] The processor for anti-interference multi-channel speaker synchronization stability testing of the present invention is configured to execute computer-executable instructions, which, when executed by the processor, implement the various steps of the above-described method for anti-interference multi-channel speaker synchronization stability testing.

[0030] The computer-readable storage medium of the present invention stores a computer program thereon, which can be executed by a processor to implement the various steps of the above-described method for anti-interference multi-channel speaker synchronization stability testing.

[0031] This invention does not directly measure the acoustic signal of the DUT speaker. Instead, it attaches a vibration acceleration sensor near the speaker frame or diaphragm. The vibration acceleration sensor can detect the mechanical vibration of the speaker and convert it into a standard voltage signal. The frequency and amplitude of the output signal directly correspond to the frequency and intensity of the speaker vibration. The host computer acquires the voltage signals of each channel through a multi-channel acquisition card and then performs frequency domain analysis. This allows for accurate determination of whether the sound output (i.e., frequency or intensity) of each DUT speaker meets expectations. This enables the testing of the sound stability of multi-channel speakers in the cockpit system and perfectly overcomes the difficulties of testing in noisy or complex acoustic environments. At the same time, the cost is also relatively low.

[0032] The core principle of this invention is the transformation from vibration to sound.

[0033] Sound is essentially the vibration of air, and a loudspeaker is a transducer that generates this vibration. Its working process is as follows: Audio electrical signals from the DUT speaker → voice coil moves in the magnetic field → drives the diaphragm / cone to vibrate → pushes air to generate sound waves.

[0034] The vibration of a speaker diaphragm has a direct causal relationship with the sound it produces. When a vibration acceleration sensor is installed on the speaker diaphragm or a component rigidly connected to it, such as the cone, dust cover, or frame, this mechanical vibration can be measured directly.

[0035] The measurement process of this invention is as follows: 1. Signal Conversion: The mechanical vibration of the DUT speaker is sensed by the accelerometer and converted into an analog electrical signal; 2. Signal Acquisition and Conditioning: The electrical signal acquisition card amplifies and filters the signal before feeding it back to the host computer of the system.

[0036] The analysis and judgment of this invention are as follows: Qualitative judgment: By comparing thresholds, it is easy and accurate to determine whether the speaker is vibrating, thereby determining whether the DUT speaker is producing sound; Quantitative analysis: By analyzing the amplitude and frequency of the vibration signal, the intensity and frequency of the sound emitted by the DUT speaker can be evaluated.

[0037] In specific embodiments of the present invention, such as Figure 1 As shown, the main implementation process is as follows: (1) The host computer sends a command to the DUT speaker to trigger the specified function; (2) The DUT speaker receives a command and triggers the specified function (the speaker emits sound and generates mechanical vibration); (3) The vibration acceleration sensor collects the mechanical vibration of the horn and converts it into a standard voltage signal; (4) The multi-channel data acquisition card acquires voltage signals and transmits them to the host computer in real time; (5) The host computer performs signal analysis and judgment.

[0038] The speaker in this invention is an amplifier peripheral of the DUT (Distributed Under Test), serving as the DUT's own sound-generating amplifier peripheral. The DUT transmits audio electrical signals to different speakers through different wiring harnesses, driving each speaker to produce sound, thereby confirming that all channels of the DUT's main amplifier module are functioning normally. The monitoring objective is to assess the stability of the DUT's control logic and the functionality of each amplifier path. Such systems typically require multiple paths to operate simultaneously, necessitating the avoidance of other sounds in the test environment and ensuring that each speaker on each channel of the DUT is functioning correctly. This invention achieves this by converting the mechanical vibrations of each speaker channel into independent digital signal streams.

[0039] This invention addresses testing scenarios with limited budgets or no external network environment by converting the air vibrations of the speaker in the DUT peripheral device into electrical signals through a vibration accelerator. This avoids interference from other airborne sound waves in the microphone solution and enables stress testing that closely approximates real-world usage scenarios without reducing the actual power amplifier and speaker of the DUT peripheral device.

[0040] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0041] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0042] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means at least two.

[0043] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0044] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution device. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0045] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The corresponding program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0046] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0047] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0048] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The present invention employs a method, system, apparatus, processor, and computer-readable storage medium for anti-interference multi-channel speaker synchronous stability testing. Using existing DUT speakers, it simulates the actual operating conditions of the system, enabling simultaneous testing of multiple channels of speakers in a single space. It also boasts low cost and strong practical value. This invention is resistant to environmental sound interference, allows for simultaneous testing of multiple channels, occupies a small footprint, and does not require network connection. It can be used to stably test the sound strategies and functions of a system.

[0050] In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A method for testing the synchronization stability of a multi-channel loudspeaker with anti-interference capabilities, characterized in that, The method includes the following steps: (1) Install vibration acceleration sensors, connect the signal output terminals of each vibration acceleration sensor to the corresponding acquisition channel of the multi-channel data acquisition card, and connect the multi-channel data acquisition card to the host computer for communication. (2) The host computer sends a function trigger command to the speaker of the DUT under test, controls the speaker of the DUT under test to execute the preset sound function and generate mechanical vibration; (3) The vibration acceleration sensor detects the mechanical vibration of the DUT speaker under test and converts it into a standard analog voltage signal; (4) The multi-channel data acquisition card collects the analog voltage signals of each channel synchronously and transmits the collected signals to the host computer in real time; (5) The host computer processes and analyzes the received voltage signals of each channel to determine the sound stability of the DUT speaker in each channel.

2. The method for testing the synchronization stability of a multi-channel loudspeaker with anti-interference capability according to claim 1, characterized in that, Step (4) further includes the following steps: Before acquiring analog voltage signals, the multi-channel data acquisition card first amplifies and filters the signals, and then transmits the conditioned signals to the host computer.

3. The method for testing the synchronization stability of a multi-channel loudspeaker with anti-interference capability according to claim 1, characterized in that, In step (5), the host computer processes and analyzes the received voltage signals from each channel, including qualitative judgment and quantitative analysis. The aforementioned qualitative judgment specifically refers to: By comparing the parameters of the voltage signal with a preset threshold, it is determined whether the speaker under test (DUT) produces mechanical vibration, and thus whether the speaker produces sound. The quantitative analysis mentioned above specifically includes: Frequency domain analysis is performed on the voltage signal to extract the amplitude and frequency characteristic parameters of the signal, and to evaluate whether the intensity and frequency of the sound emitted by the speaker of the DUT under test meet the preset expectations.

4. The method for testing the synchronization stability of a multi-channel loudspeaker with anti-interference capability according to claim 1, characterized in that, The installation of vibration acceleration sensors in step (1) specifically involves installing vibration acceleration sensors on the frame, diaphragm, or components rigidly connected to the diaphragm of the DUT speaker in each channel; the components rigidly connected to the diaphragm include at least one of the speaker cone and dust cover.

5. The method for testing the synchronization stability of a multi-channel loudspeaker with anti-interference capability according to claim 1, characterized in that, The vibration acceleration sensor is a MEMS accelerometer. The frequency of the standard analog voltage signal output by the MEMS accelerometer corresponds to the frequency of the mechanical vibration of the DUT speaker, and the amplitude of the voltage signal corresponds to the intensity of the mechanical vibration of the DUT speaker.

6. The method for testing the synchronization stability of a multi-channel loudspeaker with anti-interference capability according to claim 1, characterized in that, Step (2) or (4) further includes the following steps: Synchronous triggering and synchronous signal acquisition are performed on multiple speakers in multiple devices under test to achieve simultaneous testing of multiple channels of speakers.

7. A system for implementing the anti-interference multi-channel speaker synchronization stability test of the method described in claim 1, characterized in that, The system includes: The testing system consists of a host computer, a multi-channel data acquisition card, and at least one vibration acceleration sensor. The vibration acceleration sensor is installed on the frame, diaphragm, or a component rigidly connected to the diaphragm of the DUT speaker under test, and is used to detect the mechanical vibration of the DUT speaker under test and convert it into a standard analog voltage signal. The multi-channel data acquisition card is communicatively connected to the signal output terminal of the vibration acceleration sensor to acquire analog voltage signals and transmit the acquired signals to the host computer. The host computer is connected to the multi-channel data acquisition card for sending function trigger commands to the speaker under test (DUT), receiving signals transmitted by the multi-channel data acquisition card and processing and analyzing them to determine the sound stability of each channel of the DUT speaker.

8. The system for anti-interference multi-channel speaker synchronization stability testing according to claim 1, characterized in that, The vibration acceleration sensor is a MEMS accelerometer. The number of vibration acceleration sensors matches the number of channels of the DUT speaker under test, and is used to synchronously detect the vibration signals of the multi-channel DUT speaker.

9. A device for testing the synchronous stability of a multi-channel loudspeaker with anti-interference capabilities, characterized in that, The device includes: A processor is configured to execute computer-executable instructions; A memory that stores one or more computer-executable instructions, which, when executed by the processor, implement the steps of the method for anti-interference multi-channel speaker synchronization stability testing as described in any one of claims 1 to 6.

10. A processor for anti-interference multi-channel speaker synchronization stability testing, characterized in that, The processor is configured to execute computer-executable instructions, which, when executed by the processor, implement the steps of the method for anti-interference multi-channel speaker synchronization stability testing as described in any one of claims 1 to 6.

11. A computer-readable storage medium, characterized in that, It stores a computer program that can be executed by a processor to implement the steps of the method for anti-interference multi-channel speaker synchronization stability testing as described in any one of claims 1 to 6.

Images