Horn open circuit dynamic detection method and device and audio system

Abstract

The invention relates to a loudspeaker open circuit dynamic detection method and device and an audio system. The loudspeaker open circuit dynamic detection method comprises the following steps: performing pulse width modulation on an audio signal according to current frequency configuration to generate a working frequency signal of a current loudspeaker; inputting a working frequency signal of the current loudspeaker to the LM567, and receiving a detection electric signal output by the LM567; judging whether the current detection electric signal accords with a loudspeaker open-circuit signal or not; if not, continuing open-circuit detection; if yes, performing incremental pulse width modulation on the audio signal according to the current frequency configuration, and generating an updated frequency configuration and a working frequency signal of the current loudspeaker; judging whether the updated frequency configuration exceeds a preset incremental threshold or not; if yes, considering that the current audio equipment has an open circuit phenomenon; and if not, continuing to carry out open circuit detection on the working frequency signal of the loudspeaker after progressive increase. According to the loudspeaker open circuit dynamic detection method, the loudspeaker open circuit detection accuracy is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of audio path detection, in particular to a loudspeaker open circuit dynamic detection method and device, an audio system, an electronic device and a computer storage medium. BACKGROUND

[0002] Loudspeaker open circuit detection is a key link to ensure the normal operation of audio equipment. In actual application, the loudspeaker may fail due to various reasons, one of which is open circuit failure. The open circuit refers to the disconnection of the loudspeaker circuit, which causes the audio signal to be unable to play through the loudspeaker. In addition, when the loudspeaker open circuit occurs, it may also cause the audio amplifier circuit and other circuits to enter an abnormal state, thereby causing damage to the audio system or other circuits. Therefore, by timely detecting and identifying the open circuit state of the loudspeaker, it can effectively avoid the audio system from not working properly or affecting other circuits.

[0003] In existing audio equipment, LM567, a general tone decoder chip, is usually used to detect the open circuit of the loudspeaker, that is, by inputting a fixed frequency pulse to LM567, and judging whether the loudspeaker has an open circuit according to the high and low level changes of pin 8, so as to realize accurate open circuit fault detection. The LM567 includes 8 pins, pin 1 is an output filter pin; pin 2 is a loop filter pin; pin 3 is an input pin for detecting a given phase-locked loop frequency; pin 4 is a positive power supply pin; pin 5 is a timing resistor pin, pin 6 is a timing capacitor pin; pin 7 is a ground pin; pin 8 is an output pin. For details, please refer to Figure 1 , Figure 1 A simple structure diagram of LM567.

[0004] However, in the actual application of LM567, when the device is affected or disturbed by the environment, such as too high or too low temperature, the fixed detection frequency set by LM567 may change, which is usually referred to as "frequency hopping". In other words, temperature changes will cause the detection frequency of LM567 to be inconsistent with the original set frequency, thereby causing the device to be unable to correctly determine whether the loudspeaker is in a normal state under these environmental conditions. Accordingly, the prior art has the problem of being unable to accurately detect when using LM567 to detect the open circuit of the loudspeaker under certain environmental interference. SUMMARY

[0005] Based on this, the purpose of the present application is to provide a loudspeaker open circuit dynamic detection method.

[0006] A loudspeaker open circuit dynamic detection method, comprising the following steps:

[0007] S1, pulse width modulation is carried out on the feedback signal of the horn according to the current frequency configuration, and the working frequency signal of the current horn is generated;

[0008] S2, the working frequency signal of the current horn is input to the LM567, and a detection electric signal output by the LM567 is received;

[0009] S3, it is judged whether the current detection electric signal conforms to the horn open circuit signal: if not, the step S1 is continuously executed; if yes, the step S4 is executed;

[0010] S4, incremental pulse width modulation is carried out on the feedback signal of the horn according to the current frequency configuration, and the updated frequency configuration and the working frequency signal of the current horn are generated;

[0011] S5, it is judged whether the updated frequency configuration exceeds a preset incremental threshold: if not, the step S2 is executed; if yes, it is considered that the current horn has an open circuit phenomenon, and a related early warning signal is sent.

[0012] The horn open circuit dynamic detection method disclosed by the application, compared with the prior art, by entering the incremental pulse width modulation processing when the open circuit feature is detected, the accuracy of the horn open circuit detection under different environmental conditions is ensured by dynamically adjusting the frequency configuration of the pulse width modulation, and the possibility of misjudgment is reduced.

[0013] In one embodiment, the judgment of the horn open circuit signal is as follows:

[0014] When the detection electric signal is a high level, the step S4 is executed;

[0015] When the detection electric signal is a low level, it is considered that the current horn is running normally, and the step S1 is continuously executed.

[0016] Accordingly, by judging that the detection electric signal is a high level, it can be considered that dynamic open circuit detection is needed, so that it is realized that whether the frequency incremental process is entered is determined by simple judgment, and it is ensured that the system can enter the dynamic detection mode in time when an abnormal situation occurs

[0017] In another embodiment, the judgment of whether the current detection electric signal conforms to the horn open circuit signal further includes a duration threshold, and the specific judgment is as follows:

[0018] When the detection electric signal is a high level, and the duration of the high level is greater than the duration threshold, the step S4 is executed;

[0019] When the detection electric signal is a high level, and the duration of the high level is less than or equal to the duration threshold, it is considered that the current horn is running normally, and the step S1 is continuously executed.

[0020] When the detection electric signal is low, it is considered that the current loudspeaker is operating normally, and the step S1 is continuously executed.

[0021] Therefore, the present application introduces a duration threshold to prevent the short-term electric signal fluctuation or noise interference from being misjudged as the loudspeaker open circuit phenomenon, thereby ensuring the detection process more stable and accurate, and effectively improving the anti-interference ability of the system in complex environment and reducing the false detection caused by environmental noise or temporary failure.

[0022] Further, the incremental pulse width modulation is to update the current frequency configuration according to a frequency increment parameter to generate an updated frequency configuration.

[0023] Then, the feedback signal of the loudspeaker is pulse width modulated according to the updated frequency configuration to form the working frequency signal of the current loudspeaker after increment.

[0024] Therefore, the present application uses a fixed frequency increment parameter to perform pulse width modulation in a multi-frequency point / sweeping frequency manner to find the required frequency point corresponding to the frequency hopping of the center frequency of LM567 at the current temperature, thereby ensuring that the system can adapt to environmental changes and dynamically adjust the detection frequency to avoid misjudgment caused by frequency drift when detecting at a fixed frequency, and significantly improve the stability and reliability of the loudspeaker open circuit detection to ensure high-precision detection results under temperature fluctuations and other environmental disturbances.

[0025] A loudspeaker open circuit dynamic detection device includes a pulse width modulation unit, an open circuit signal receiving unit, an open circuit identification unit, an incremental pulse width modulation unit, and an incremental limit judgment unit.

[0026] The pulse width modulation unit is configured to pulse width modulate the feedback signal of the loudspeaker according to the current frequency configuration to generate the working frequency signal of the current loudspeaker.

[0027] The open circuit signal receiving unit is configured to input the working frequency signal of the current loudspeaker to LM567 and receive the detection electric signal output by LM567.

[0028] The open circuit identification unit is configured to determine whether the current detection electric signal conforms to the loudspeaker open circuit signal: if not, the pulse width modulation unit 1 is continuously called; and if yes, the incremental pulse width modulation unit 4 is called.

[0029] The incremental pulse width modulation unit is configured to incrementally pulse width modulate the feedback signal of the loudspeaker according to the current frequency configuration to generate the updated frequency configuration and the working frequency signal of the current loudspeaker.

[0030] The increasing limit judging unit is used for judging whether the updated frequency configuration exceeds a preset increasing threshold: if not, the open circuit signal sending unit 2 is called; if yes, it is considered that the current loudspeaker has an open circuit phenomenon, and a related early warning signal is sent.

[0031] An audio system comprises an audio circuit board electrically connected with a loudspeaker, a loudspeaker open circuit dynamic detection device electrically connected with the audio circuit board, and an LM567 electrically connected with the loudspeaker open circuit dynamic detection device.

[0032] The audio circuit board is used for performing audio signal processing on audio to be played, generating an audio signal, and sending the audio signal to the loudspeaker for playing after pulse width modulation, and simultaneously generating a feedback signal of the loudspeaker and transmitting the feedback signal of the loudspeaker to the loudspeaker open circuit dynamic detection device.

[0033] The LM567 is used for receiving a working frequency signal of the loudspeaker of the loudspeaker open circuit dynamic detection device through a pin 3 and matching a preset center frequency, and then outputting a corresponding detection electric signal to the loudspeaker open circuit dynamic detection device for open circuit detection through a pin 8 according to a matching result.

[0034] The loudspeaker open circuit dynamic detection device is the loudspeaker open circuit dynamic detection device described above.

[0035] In order to better understand and implement, the present application is described in detail below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a simple structure schematic diagram of the LM567.

[0037] Figure 2 It is a simple example schematic diagram of the data transmission structure of the audio system.

[0038] Figure 3 It is a simple structure schematic diagram of the loudspeaker open circuit dynamic detection device described in the present application.

[0039] Figure 4 It is a simple flow schematic diagram of the loudspeaker open circuit dynamic detection method described in the present application. DETAILED DESCRIPTION

[0040] In order to solve the problem that the prior art cannot accurately detect when using LM567 to detect the open circuit of the loudspeaker under certain environmental interference, the working frequency signal of the current loudspeaker is generated by pulse width modulation of the audio signal according to the current frequency configuration; the working frequency signal of the current loudspeaker is input to the LM567, and a detection electric signal output by the LM567 is received; whether the current detection electric signal conforms to the open circuit signal of the loudspeaker is judged; if not, the open circuit detection is continued; if yes, the working frequency signal of the loudspeaker after increment is generated by increment pulse width modulation of the audio signal according to the current frequency configuration; and whether the updated frequency configuration exceeds the preset increment threshold is judged; if yes, it is considered that the current audio equipment has an open circuit phenomenon; if not, the open circuit detection of the working frequency signal of the loudspeaker after increment is continued.

[0041] Accordingly, the present application uses increment pulse width modulation to detect whether there is an open circuit fault by multiple frequency points, thereby avoiding the detection failure caused by one-time frequency detection under complex temperature changes or external interference, improving the accuracy and stability of the loudspeaker open circuit detection, and avoiding misjudgment or missed detection.

[0042] Based on the above design, the present application provides a loudspeaker open circuit dynamic detection method, and a loudspeaker open circuit dynamic detection device based on the method.

[0043] Please refer to Figure 2 , Figure 2 for a simple example of the data transmission structure of the audio system.

[0044] An audio system includes an audio circuit board electrically connected with a loudspeaker, a loudspeaker open circuit dynamic detection device electrically connected with the audio circuit board, and an LM567 electrically connected with the loudspeaker open circuit dynamic detection device.

[0045] The audio circuit board is used for audio signal processing of audio to be played, generating an audio signal, and sending the audio signal to the loudspeaker for playing after pulse width modulation, and generating a feedback signal of the loudspeaker, and transmitting the feedback signal of the loudspeaker to the loudspeaker open circuit dynamic detection device; wherein the audio signal processing includes audio amplification or noise reduction, etc., and the present application does not specifically limit the audio signal processing mode.

[0046] The LM567 is used for receiving the working frequency signal of the loudspeaker of the loudspeaker open circuit dynamic detection device through pin 3, and matching a preset center frequency; then, according to the matching result, the corresponding detection electric signal is output to the loudspeaker open circuit dynamic detection device through pin 8 for open circuit detection.

[0047] Please refer to Figure 3 and Figure 4, Figure 3 A simple structure diagram of the horn open circuit dynamic detection device, Figure 4 A simple flow diagram of the horn open circuit dynamic detection method.

[0048] The horn open circuit dynamic detection device comprises a pulse width modulation unit 1, an open circuit signal receiving unit 2, an open circuit identification unit 3, an incremental pulse width modulation unit 4, and an incremental limit judgment unit 5.

[0049] The pulse width modulation unit 1 is used to perform step S1: according to the current frequency configuration, the feedback signal of the horn is pulse width modulated to generate the working frequency signal of the current horn.

[0050] Specifically, the pulse width modulation (PWM) converts the analog waveform of the feedback signal of the horn into a pulse width modulated digital signal based on the current frequency configuration, so that it characterizes the working frequency of the horn, and generates the working frequency signal of the current horn.

[0051] The frequency configuration indicates the specific value used to adjust the frequency of the PWM signal in the pulse width modulation process, which can be a fixed initial frequency configuration set in advance according to system design and horn working requirements.

[0052] It should be noted that the feedback signal of the horn is used to reflect the actual working state of the horn, including the changes of the current, voltage or other physical quantities of the horn, which can generally be obtained by measuring the horn current or voltage.

[0053] The open circuit signal receiving unit 2 is used to perform step S2: inputting the working frequency signal of the current horn to LM567 and receiving the detection electric signal output by LM567.

[0054] Specifically, when the working frequency signal of the current horn is input to LM567, LM567 will compare the signal with the preset center frequency:

[0055] If the working frequency signal of the current horn is consistent with the preset center frequency of LM567, LM567 will output a low-level detection electric signal;

[0056] If the working frequency of the current horn is inconsistent with the preset center frequency of LM567, LM567 will output a high-level detection electric signal.

[0057] It should be emphasized that the center frequency of LM567 is determined by the external resistance and capacitance connected to the 5th and 6th pins, that is, the center frequency f can be calculated by the formula f≈1 / 1.1RC, where R is the resistance value of the external resistance and C is the capacitance of the external capacitance. Therefore, according to the resistance and capacitance values selected by the user, the center frequency of LM567 can be flexibly adjusted to adapt to different working conditions and requirements.

[0058] The open circuit identification unit 3 is used to execute step S3: judging whether the current detection electrical signal conforms to the horn open circuit signal: if not, continue to call the pulse width modulation unit 1; if yes, call the incremental pulse width modulation unit 4.

[0059] Specifically, the judgment of the horn open circuit signal is represented as follows:

[0060] When the detection electrical signal is high, the incremental pulse width modulation unit 4 is called for dynamic open circuit detection;

[0061] When the detection electrical signal is low, it is considered that the current horn is running normally, and the pulse width modulation unit 1 is continued to be called.

[0062] In order to further prevent false detection, in another embodiment, judging whether the current detection electrical signal conforms to the horn open circuit signal further includes a duration threshold, and the specific judgment is represented as follows:

[0063] When the detection electrical signal is high, and the duration of the high level is greater than the duration threshold, the incremental pulse width modulation unit 4 is called for dynamic open circuit detection;

[0064] When the detection electrical signal is high, and the duration of the high level is less than or equal to the duration threshold, it is considered that the current horn is running normally, and the pulse width modulation unit 1 is continued to be called.

[0065] When the detection electrical signal is low, it is considered that the current horn is running normally, and the pulse width modulation unit 1 is continued to be called.

[0066] The duration threshold is 4 seconds by default.

[0067] Accordingly, in order to prevent transient noise interference or circuit fluctuation from causing false entry into the dynamic open circuit detection state, the present application introduces a duration threshold to ensure that only when the detection electrical signal is in a high level state for more than a preset time (for example, 4 seconds), the signal is considered to represent a horn open circuit, thereby effectively eliminating false judgments caused by short-term factors such as power fluctuations, and further improving the detection stability and accuracy of the system in a dynamic environment, and avoiding frequent entry into the sweep mode.

[0068] The incremental pulse width modulation unit 4 is used to perform step S4: according to the current frequency configuration, the feedback signal of the horn is incrementally pulse width modulated to generate an updated frequency configuration and the working frequency signal of the current horn.

[0069] Specifically, the incremental pulse width modulation is that the current frequency configuration is incrementally updated according to a frequency increment parameter to generate an updated frequency configuration.

[0070] Then, the feedback signal of the horn is pulse width modulated according to the updated frequency configuration to form the working frequency signal of the horn after increment.

[0071] The frequency increment parameter has a value range of the initial frequency configuration ± 1500 hz, and the initial value of the frequency increment parameter is the initial frequency configuration-1500 hz; and the increment step of subsequent iterations is 100 hz. For example, if the initial frequency configuration is 20 kHz, then the initial value (the first configuration) is 18.5 kHz when the dynamic open circuit detection is entered, the second configuration is 18.6 kHz, and so on.

[0072] Since the audio circuit board or the LM567 may cause the temperature of the environment or the chip to change after a long running time, the reference frequency of the LM567 drifts, and the detection electric signal is misjudged (that is, the center frequency preset by the LM567 jumps, and the detection electric signal of the high level is incorrectly output), but actually the horn does not have an open circuit phenomenon.

[0073] Based on this, the frequency configuration is incrementally updated to realize frequency sweeping of pulse width modulation, that is, the pulse width modulation is performed according to the frequency configuration iteration from low frequency to high frequency, so that the horn open circuit phenomenon is dynamically detected, and the accuracy, reliability and stability of the horn open circuit detection are effectively improved.

[0074] The incremental limit judgment unit 5 is used to perform step S5: judging whether the updated frequency configuration exceeds a preset incremental threshold: if not, the open circuit signal sending unit 2 is called; if yes, it is considered that the current horn has an open circuit phenomenon, and a related early warning signal is sent.

[0075] The incremental threshold is the initial frequency+1500 hz. For example, if the initial frequency is 20 kHz, then the incremental threshold is 21.5 kHz, when the frequency of the pulse width modulation is greater than 21.5 kHz, it is considered that the horn has an open circuit phenomenon, and a related early warning signal is sent to prompt manual intervention.

[0076] It should be noted that in the dynamic open circuit detection process of the application, when the detection electrical signal is restored to a low level, the frequency configuration used by the subsequent pulse width modulation unit 1 is the updated frequency configuration for pulse width modulation, that is, the frequency configuration for pulse width modulation is dynamically shifted according to temperature changes, thereby ensuring that it conforms to the center frequency after the LM567 frequency hopping.

[0077] On the other hand, if the frequency configuration accumulates to more than 1500Hz beyond the initial frequency during the dynamic open circuit detection process, and the detection electrical signal still remains high, it is considered that the current speaker has an open circuit phenomenon, and manual intervention is required to replace the speaker or check the circuit to restore it to normal. Further, the frequency configuration is initialized to restore the current frequency configuration to the initial frequency configuration until the next dynamic open circuit detection process.

[0078] In summary, the application forms a closed-loop feedback mechanism by dynamically adjusting the frequency configuration and combining the state changes of the detection electrical signal, effectively improving the accuracy, reliability and stability of the dynamic open circuit detection process. It can also dynamically adapt to changes in environmental temperature and changes in hardware characteristics, avoiding misjudgment caused by LM567 frequency hopping, thereby improving the robustness of the entire detection system in complex environments.

[0079] Compared with the prior art, the application introduces incremental pulse width modulation and dynamic frequency adjustment mechanism to solve the problem of frequency drift caused by environmental temperature changes and other interference factors, and avoids misjudgment caused by frequency drift when fixed frequency detection is performed, thereby ensuring that high-precision detection results can still be obtained under temperature fluctuations and other environmental disturbances.

[0080] In addition, the application introduces a duration threshold judgment before performing the dynamic open circuit detection, effectively improving the anti-interference ability of the detection system and reducing the possibility of misjudgment, thereby realizing accurate and stable speaker open circuit detection under various environmental conditions.

[0081] Based on the same inventive concept, the application also provides an electronic device, which can be a server, a desktop computing device or a mobile computing device (for example, a laptop computer, a handheld computing device, a tablet computer, a netbook, etc.) or a terminal device. The device includes one or more processors and a memory, wherein the processor is used to execute a program to implement the speaker open circuit dynamic detection method of the embodiments of the application; and the memory is used to store a computer program executable by the processor.

[0082] Based on the same inventive concept, the application also provides a computer readable storage medium, corresponding to the aforementioned speaker open circuit dynamic detection method, the computer readable storage medium has a computer program stored thereon, and the program is executed by a processor to implement the steps of the speaker open circuit dynamic detection method described in any of the embodiments.

[0083] The application can take the form of a computer program product including a computer readable storage medium having program code stored thereon. Computer readable storage media can include any medium that can be read and accessed by a computer. Such mediums can include, but are not limited to, optical, magnetic, memory devices, and the like. In some embodiments, the computer readable storage medium can include a floppy disk, hard drive, RAM, ROM, EEPROM, CD-ROM, DVD, memory stick, or other memory device or computer readable media. In some embodiments, the computer readable storage medium can be distributed over a network capable of storing the program code. In some embodiments, the computer readable storage medium can be a combination of media, such as compact discs, hard drives, RAM, and the like.

[0084] The above embodiments are only some of the embodiments of the present application, which are described in a more specific and detailed manner, but should not be understood as a limitation to the scope of the patent. It should be noted that for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and the present application is intended to include these modifications and improvements.

Claims

1. A dynamic detection method for a loudspeaker open circuit, characterized in that: The following steps are involved: S1. Pulse width modulation is performed on the feedback signal of the speaker according to the current frequency configuration to generate the current operating frequency signal of the speaker; S2: Input the current speaker operating frequency signal to LM567, and receive the detection electrical signal output by LM567; S3, determining whether the current detection electrical signal meets the speaker open circuit signal: if not, continue to execute the step S1; if yes, execute step S4; S4. Perform incremental pulse width modulation on the feedback signal of the speaker according to the current frequency configuration to generate an updated frequency configuration and the current operating frequency signal of the speaker; S5. Determine whether the updated frequency configuration exceeds a preset increment threshold: if not, execute step S2; if so, consider that the current speaker has an open circuit and issue a related warning signal.

2. The speaker open circuit dynamic detection method according to claim 1, characterized in that: The judgment of the speaker open circuit signal is expressed as follows: When the detection electrical signal is at a high level, executing step S4; When the detection electrical signal is at a low level, it is considered that the current speaker is operating normally, and step S1 is continued.

3. The speaker open circuit dynamic detection method according to claim 1, characterized in that: The determination of whether the current detection electrical signal meets the speaker open circuit signal also includes a duration threshold, and the specific determination is as follows: When the detection electrical signal is at a high level and the duration of the high level is greater than the duration threshold, executing step S4; When the detection electrical signal is at a high level and the duration of the high level is less than or equal to the duration threshold, it is considered that the current speaker is operating normally, and step S1 is continued; When the detection electrical signal is at a low level, it is considered that the current speaker is operating normally, and step S1 is continued.

4. The speaker open circuit dynamic detection method according to any one of claims 2 or 3, characterized in that: The incremental pulse width modulation is to incrementally update the current frequency configuration according to a frequency increment parameter to generate an updated frequency configuration; Next, pulse width modulation is performed on the feedback signal of the speaker according to the updated frequency configuration to form an increased operating frequency signal of the current speaker.

5. A speaker open circuit dynamic detection device, characterized in that: It includes a pulse width modulation unit, an open circuit signal receiving and sending unit, an open circuit identification unit, an incremental pulse width modulation unit and an incremental limit judgment unit; The pulse width modulation unit is used to perform pulse width modulation on the feedback signal of the speaker according to the current frequency configuration to generate the current operating frequency signal of the speaker; The open-circuit signal receiving and sending unit is used to input the current speaker's operating frequency signal into the LM567 and receive the detection electrical signal output by the LM567; The open circuit identification unit is used to determine whether the current detection electrical signal meets the speaker open circuit signal: if not, continue to call the pulse width modulation unit 1; if so, call the incremental pulse width modulation unit 4; The incremental pulse width modulation unit is used to perform incremental pulse width modulation on the feedback signal of the speaker according to the current frequency configuration to generate an updated frequency configuration and the current operating frequency signal of the speaker; The incremental limit judgment unit is used to judge whether the updated frequency configuration exceeds the preset incremental threshold: if not, the open circuit signal receiving and sending unit 2 is called; if so, it is considered that the current speaker has an open circuit phenomenon and a relevant warning signal is issued.

6. The speaker open circuit dynamic detection device according to claim 5, characterized in that: The determination of whether the current detection electrical signal meets the speaker open circuit signal also includes a duration threshold, and the specific determination is as follows: When the detection electrical signal is at a high level and the duration of the high level is greater than the duration threshold, the incremental pulse width modulation unit 4 is called to perform dynamic open circuit detection; When the detection electrical signal is at a high level and the duration of the high level is less than or equal to the duration threshold, it is considered that the current speaker is operating normally and the pulse width modulation unit 1 is continued to be called; When the detection electrical signal is at a low level, it is considered that the current speaker is operating normally, and the pulse width modulation unit 1 continues to be called.

7. The speaker open circuit dynamic detection device according to claim 6, characterized in that: The incremental pulse width modulation is to incrementally update the current frequency configuration according to a frequency increment parameter to generate an updated frequency configuration; Next, pulse width modulation is performed on the feedback signal of the speaker according to the updated frequency configuration to form an increased operating frequency signal of the current speaker.

8. An audio system, characterized in that An audio circuit board electrically connected to a speaker, a speaker open circuit dynamic detection device electrically connected to the audio circuit board, and an LM567 electrically connected to the speaker open circuit dynamic detection device; The audio circuit board is used to process the audio to be played to generate an audio signal, and then transmit the audio signal to the speaker for playback after pulse width modulation, and generate a feedback signal from the speaker, and transmit the feedback signal from the speaker to the speaker open circuit dynamic detection device; The LM567 is used to receive the operating frequency signal of the speaker of the speaker open circuit dynamic detection device through pin 3 and match it with the preset center frequency; then, based on the matching result, it outputs the corresponding detection electrical signal through pin 8 to the speaker open circuit dynamic detection device for open circuit detection; Wherein, the speaker open circuit dynamic detection device is the speaker open circuit dynamic detection device according to any one of claims 5 to 7 above.

9. An electronic device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for dynamic detection of a loudspeaker open circuit as claimed in any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium storing computer-executable instructions, characterized in that: When the computer executable instructions are executed by a processor, a loudspeaker open circuit dynamic detection method according to any one of claims 1 to 4 is implemented.

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