Automatic fault detection system and method for outdoor column sound

Abstract

The present invention discloses an automatic fault detection system and method for an outdoor column sound. The system comprises: a column sound and a server; wherein the column sound includes a main control chip, a power amplifier module, a speaker unit, and a detection circuit; the server is configured to send a digital signal to the column sound via a network; the main control chip is configured to decode the digital signal into an audio signal; the main control chip is configured to determine whether the main control chip, the power amplifier module, and the speaker unit are faulty based on the detection signal transmitted by the detection circuit, and the judgment result is transmitted to the server via the network; the power amplifier module is configured to amplify the audio signal to obtain an amplified signal; the speaker unit is configured to convert the amplified signal into a sound signal and play it; and the detection circuit is configured to collect and detect the audio signal, the amplified signal, and the sound signal, and transmit the obtained detection signal to the main control chip. The present invention improves the fault detection efficiency of outdoor column sound and can be widely used in the field of column sound fault detection.

Description

Technical Field

[0001] The present invention relates to the field of sound column fault detection, and in particular to an automatic fault detection system and method for an outdoor sound column. Background Art

[0002] Existing network-based outdoor sound columns typically use an amplifier or a network-connected server with a built-in amplifier power supply and speaker unit for decoding and playback. However, this existing technology suffers from the following drawbacks: when the decoding unit is functioning properly, the server's display terminal will show the sound column's playback status as normal. Only when the main control decoding chip malfunctions will the sound column be displayed as offline. Problems with the amplifier circuit or loose speaker cables can cause the speaker to be silent or low-volume. Maintenance personnel in the server room cannot detect the fault and must visit the site to individually troubleshoot the problematic sound column. This makes troubleshooting very inefficient in outdoor settings, such as large scenic areas. Summary of the Invention

[0003] In view of this, an embodiment of the present invention provides a system and method for automatically detecting faults of an outdoor column speaker, so as to improve the efficiency of fault detection of the outdoor column speaker.

[0004] One aspect of an embodiment of the present invention provides an automatic fault detection system for an outdoor sound column, comprising: a sound column and a server; wherein the sound column comprises a main control chip, a power amplifier module, a speaker unit, and a detection circuit;

[0005] The server is used to send digital signals to the sound column via the network;

[0006] The main control chip is used to decode the digital signal into an audio signal; determine whether the main control chip, the power amplifier module and the speaker unit are faulty according to the detection signal transmitted by the detection circuit, and send the judgment result to the server via the network;

[0007] The power amplifier module is used to amplify the audio signal to obtain an amplified signal;

[0008] The speaker unit is used to convert the amplified signal into a sound signal and play it;

[0009] The detection circuit is used to collect and detect the audio signal, the amplified signal and the sound signal, and transmit the obtained detection signal to the main control chip.

[0010] Optionally, the system further includes a display terminal;

[0011] The display terminal is connected to the server and is used to display the judgment result to inform maintenance personnel of the fault condition of the sound column.

[0012] Optionally, the power amplifier module includes an operational amplifier and a power amplifier;

[0013] The operational amplifier is used to amplify the audio signal to obtain a primary signal;

[0014] The power amplifier is used to amplify the primary signal to obtain the amplified signal.

[0015] Optionally, the main control chip includes a network module and an audio decoding module;

[0016] The network module is configured to receive the digital signal sent by the server and send the judgment result to the server;

[0017] The audio decoding module is used to decode the digital signal into an audio signal.

[0018] Optionally, the network module uses an RJ45 network port.

[0019] Optionally, the main control chip further includes a main control module DRAM, which is used to store the digital signal.

[0020] Optionally, the detection circuit includes a first detection circuit, a second detection circuit and a third detection circuit;

[0021] The first detection circuit is used to collect and detect the audio signal to obtain a first detection signal, and transmit the first detection signal to the first IO port of the main control chip;

[0022] The second detection circuit is used to collect and detect the amplified signal to obtain a second detection signal, and transmit the second detection signal to the second IO port of the main control chip;

[0023] The third detection circuit is used to collect and detect the sound signal, obtain a third detection signal, and transmit the third detection signal to the third IO port of the main control chip.

[0024] Optionally, the main control chip is configured to determine whether the main control chip, the power amplifier module, and the speaker unit are faulty based on a detection signal transmitted by the detection circuit, including:

[0025] The main control chip is used to determine whether the main control chip, the power amplifier module or the speaker unit is faulty according to whether there are signals at the first IO port, the second IO port and the third IO port.

[0026] Another aspect of the present invention provides a method for automatically detecting faults of an outdoor column sounder, which is applied to a main control chip in the automatic fault detection system of the outdoor column sounder. The method includes:

[0027] Receive digital signals sent by the server;

[0028] Decoding the digital signal into an audio signal and transmitting the signal to the power amplifier module, so that the power amplifier module amplifies the audio signal to obtain an amplified signal and the speaker unit converts the amplified signal into a sound signal;

[0029] receiving a detection signal of a detection circuit for the digital signal, the amplified signal, and the sound signal;

[0030] It is determined whether the main control chip, the power amplifier module and the speaker unit are faulty according to the detection signal.

[0031] Optionally, the method further includes:

[0032] The judgment result obtained according to the detection signal is sent to the server, so that the server displays the judgment result through a display terminal.

[0033] Another aspect of the present invention provides an automatic fault detection device for an outdoor column speaker, comprising:

[0034] A digital signal receiving unit, configured to receive a digital signal sent by a server;

[0035] an audio signal conversion unit, configured to decode the digital signal into an audio signal and transmit the decoded signal to the power amplifier module, so that the power amplifier module amplifies the audio signal to obtain an amplified signal and the speaker unit converts the amplified signal into a sound signal;

[0036] a detection signal receiving unit, configured to receive detection signals of the detection circuit for the digital signal, the amplified signal, and the sound signal;

[0037] The fault judgment unit is used to judge whether the main control chip, the power amplifier module and the speaker unit have faults according to the detection signal.

[0038] Another aspect of an embodiment of the present invention further provides an electronic device, including a processor and a memory;

[0039] The memory is used to store programs;

[0040] The processor executes the program to implement the automatic fault detection method for an outdoor column speaker.

[0041] Another aspect of the embodiments of the present invention further provides a computer-readable storage medium, wherein the storage medium stores a program, and the program is executed by a processor to implement the automatic fault detection method for an outdoor column sound.

[0042] The present invention also discloses a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium and execute the computer instructions, causing the computer device to perform the above method.

[0043] The present invention uses a detection circuit in the sound column to detect the working status of the main control chip, the power amplifier module and the speaker unit when the sound column is playing audio. Then, according to the detection signal obtained by the detection circuit, not only can it be detected whether the main control chip has a fault, but the present invention can also detect whether the power amplifier module has a short circuit or whether the chip of the power amplifier module is damaged through the detection signal. It can also detect whether the internal wiring of the speaker unit is loose or the sound of the speaker unit is low. The fault judgment result is then sent to the server, and the maintenance personnel can also quickly and clearly grasp the fault situation of the outdoor sound column in the server room. Therefore, the present invention can quickly find the faulty sound column, facilitate maintenance personnel to repair the sound column, and improve the efficiency of fault detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 An exemplary structural diagram of an automatic fault detection system for an outdoor column speaker provided by an embodiment of the present invention;

[0046] Figure 2 A schematic flow chart of a method for automatically detecting faults of an outdoor column speaker provided by an embodiment of the present invention;

[0047] Figure 3 A structural block diagram of an automatic fault detection device for an outdoor column speaker provided by an embodiment of the present invention;

[0048] Figure 4 An exemplary circuit diagram of a detection circuit provided by an embodiment of the present invention;

[0049] Figure 5 This is an exemplary circuit diagram of another detection circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] Reference Figure 1 An embodiment of the present invention provides an automatic fault detection system for an outdoor sound column, which may specifically include: a sound column and a server; wherein the sound column includes a main control chip, a power amplifier module, a speaker unit and a detection circuit.

[0052] Next, the system of the embodiment of the present invention will be described in detail, which may specifically include the following:

[0053] The server is used to send digital signals to the sound column via a network.

[0054] Specifically, the server can send a digital signal to the sound column through the network. The main control chip in the sound column can include a network module, and the sound column can achieve network communication with the server through the network module.

[0055] In an optional implementation, the network module can use an RJ45 network port, that is, the sound column of the embodiment of the present invention can communicate with the server through the RJ45 network port, for example: receiving digital signals sent by the server or sending information to the server.

[0056] The main control chip is used to decode the digital signal into an audio signal; determine whether the main control chip, the power amplifier module and the speaker unit are faulty based on the detection signal transmitted by the detection circuit, and send the judgment result to the server via the network.

[0057] Specifically, the main control chip may include a network module and an audio decoding module, wherein the network module is used to receive the digital signal sent by the server and send the judgment result to the server; the audio decoding module is used to decode the digital signal into an audio signal.

[0058] In an optional implementation, the network module may adopt an RJ45 network port, or other communication network ports, which is not strictly limited in the embodiment of the present invention.

[0059] Furthermore, the main control chip may also include a main control module DRAM for storing the digital signal.

[0060] The power amplifier module is used to amplify the audio signal to obtain an amplified signal.

[0061] Specifically, the power amplifier module of an embodiment of the present invention may include an operational amplifier and a power amplifier, wherein the operational amplifier is used to perform primary amplification of the audio signal, that is, to amplify the audio signal to obtain a primary signal; and the power amplifier is used to amplify the primary signal to obtain the amplified signal.

[0062] The speaker unit is used to convert the amplified signal into a sound signal and play it.

[0063] Specifically, the speaker unit may be an audio output device such as a microphone, which may convert the amplified audio signal into a sound signal and play the sound signal.

[0064] The detection circuit is used to collect and detect the audio signal, the amplified signal and the sound signal, and transmit the obtained detection signal to the main control chip.

[0065] Specifically, the detection circuit includes a first detection circuit, a second detection circuit and a third detection circuit.

[0066] Among them, the first detection circuit is used to collect and detect the audio signal, obtain a first detection signal, and transmit the first detection signal to the first IO port of the main control chip; the second detection circuit is used to collect and detect the amplified signal, obtain a second detection signal, and transmit the second detection signal to the second IO port of the main control chip; the third detection circuit is used to collect and detect the sound signal, obtain a third detection signal, and transmit the third detection signal to the third IO port of the main control chip.

[0067] Therefore, the main control chip can judge whether there is a fault in the main control chip, the power amplifier module and the speaker unit based on the detection signal transmitted by the detection circuit: the main control chip is used to judge whether there is a fault in the main control chip, the power amplifier module or the speaker unit based on whether there is a signal at the first IO port, the second IO port and the third IO port.

[0068] Specifically, since the audio signal passes through the main control chip, the power amplifier module and the speaker unit in an orderly manner in the embodiment of the present invention, the fault location can be determined based on whether there is a signal at the corresponding IO port on the main control chip.

[0069] Among them, if the first IO port detects a signal, but the second IO port and the third IO port do not detect a signal, it can be judged that the main control chip is operating normally, but the power amplifier module or the speaker unit is faulty; if the first IO port and the second IO port detect a signal, but the third IO port does not detect a signal, then the speaker unit is faulty; if no signal is detected at any of the three IO ports, then the main control chip is faulty, or the main control chip, the power amplifier module or the speaker unit are all faulty.

[0070] Furthermore, in order to allow maintenance personnel to clearly understand the fault situation, the system of the embodiment of the present invention may further include a display terminal connected to the server for displaying the judgment result to inform maintenance personnel of the fault situation of the sound column.

[0071] Reference Figure 2 The embodiment of the present invention provides a method for automatically detecting faults of an outdoor column sounder, which is applied to a main control chip in the automatic fault detection system of the outdoor column sounder. The method includes:

[0072] S100: Receive a digital signal sent by a server.

[0073] S110: Decode the digital signal into an audio signal and transmit the audio signal to a power amplifier module, so that the power amplifier module amplifies the audio signal to obtain an amplified signal and the speaker unit converts the amplified signal into a sound signal.

[0074] S120: Receive detection signals from a detection circuit for the digital signal, the amplified signal, and the sound signal.

[0075] S130: Determine whether the main control chip, the power amplifier module, and the speaker unit are faulty according to the detection signal.

[0076] Furthermore, the embodiment of the present invention may further include: sending a judgment result obtained according to the detection signal to the server, so that the server displays the judgment result through a display terminal.

[0077] Specifically, the specific implementation process of the method for automatic fault detection of an outdoor column sounder according to an embodiment of the present invention can refer to the description of the main control chip in the automatic fault detection system of the outdoor column sounder described above.

[0078] Reference Figure 3 The embodiment of the present invention provides an automatic fault detection device for an outdoor column speaker, comprising:

[0079] A digital signal receiving unit, configured to receive a digital signal sent by a server;

[0080] an audio signal conversion unit, configured to decode the digital signal into an audio signal and transmit the decoded signal to the power amplifier module, so that the power amplifier module amplifies the audio signal to obtain an amplified signal and the speaker unit converts the amplified signal into a sound signal;

[0081] a detection signal receiving unit, configured to receive detection signals of the detection circuit for the digital signal, the amplified signal, and the sound signal;

[0082] The fault judgment unit is used to judge whether the main control chip, the power amplifier module and the speaker unit have faults according to the detection signal.

[0083] Next, the application process of the present invention will be described with specific examples.

[0084] Still Figure 1 The automatic fault detection system of an outdoor sound column shown is used as an example for explanation.

[0085] Specifically, the sound column of the present invention can be an outdoor network sound column. It can be connected to a server via an RJ45 network interface. The sound column's main control chip communicates digitally with the server via an internal network module. The digital signal transmitted by the server is decoded into an audio signal. The audio signal is then amplified by an operational amplifier before being amplified by a power amplifier. The amplified audio signal is then fed into the speaker unit, converting the electrical audio signal into audible sound. The sound column of the present invention samples and amplifies the audio signal decoded by the main control chip. After amplification by the power amplifier, the current is detected and amplified before entering the speaker unit. After the speaker unit emits sound, the sound is picked up by a microphone, detected and amplified, and three detection signals, IO1, IO2, and IO3, are generated and transmitted to the main control chip for comparative analysis. For example, if IO1 has a signal but IO2 and IO3 do not, it is determined that the power amplifier module or the speaker unit is faulty. If IO1 and IO2 have a signal but IO3 does not, it can be determined that the sound of the sound column is low. Maintenance personnel can then monitor the sound from the on-site microphone through a monitoring system.

[0086] Reference Figure 4 , an embodiment of the present invention provides an example circuit diagram of a detection circuit.

[0087] Specifically, the detection circuit of this embodiment of the present invention can detect the audio signal decoded by the main control chip and the signal entering the speaker unit. The decoded audio signal passes through C19 and C21, and then through the op amp circuit composed of U3 and R19, R22, and R26 for amplification. The DC signal is then isolated by C35 and rectified by D3. The signal then controls IO1 of the main control chip through a trigger circuit composed of Q7, Q8, and peripheral circuits.

[0088] After the output of the power amplifier module, a current sensing chip, ACS712, is added before the speaker unit to detect the current flowing through the speaker. The detected signal is isolated as a DC signal by C17, amplified by the op amp circuit composed of R20, R23, and U3, and then isolated as a DC signal by C36. It is rectified by D2 and then controls IO2 of the main control chip through a trigger circuit composed of Q5, Q6, and peripheral circuits.

[0089] Reference Figure 5 , an embodiment of the present invention provides an example circuit diagram of another detection circuit.

[0090] Specifically, a microphone is connected to input port P4, where the signal is amplified by the MAX4467 MIC amplifier. This signal then passes through the amplifier circuit comprised of C3, R5, R11, C8, and U2, and enters the audio capture pin of the main control chip. After this, it is converted into a digital signal and transmitted to the server, providing a signal for monitoring live events. Another signal is amplified by the amplifier circuit comprised of C2, R3, R9, and U2. The DC signal is then isolated by C34 and rectified by D1. This signal then passes through a trigger circuit comprised of Q3, Q4, and peripheral circuits to control IO3 of the main control chip.

[0091] A networked outdoor sound column according to an embodiment of the present invention detects signal source voltage, amplifier output current, and speaker electroacoustic status through a microphone, enabling fault detection during online audio playback. Connecting to a server via an RJ45 network interface, the built-in detection circuitry detects the initial audio signal decoded by the main control, the current entering the speaker after power amplification, and the sound signal picked up by the built-in microphone of the sound column. The resulting detection signals are then transmitted to the main control chip for comparative analysis, enabling online fault detection.

[0092] The embodiment of the present invention uses a built-in detection circuit in the sound column to detect the working status of the power amplifier module and the speaker unit while playing audio. It can detect situations such as a short circuit in the power amplifier module or damage to the chip of the power amplifier module, loose wiring in the speaker unit, and low sound from the speaker unit, thereby facilitating maintenance personnel to maintain the equipment and quickly locate problematic sound columns.

[0093] The embodiment of the present invention also discloses a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs Figure 2 The method shown.

[0094] In some optional embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present invention is provided in an exemplary manner for the purpose of providing a more comprehensive understanding of the technology. The disclosed method is not limited to the operation and logic flow presented herein. Optional embodiments are contemplated in which the order of the various operations is changed and the sub-operations described as a part of a larger operation are performed independently.

[0095] Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise indicated, one or more of the functions and / or features described may be integrated into a single physical device and / or software module, or one or more functions and / or features may be implemented in separate physical devices or software modules. It will also be understood that a detailed discussion of the actual implementation of each module is not necessary for understanding the present invention. More specifically, given the properties, functions, and internal relationships of the various functional modules in the devices disclosed herein, the actual implementation of the module will be understood within the ordinary skill of an engineer. Therefore, a person skilled in the art using ordinary skill will be able to implement the present invention set forth in the claims without undue experimentation. It will also be understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0096] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0097] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0098] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0099] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0100] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0101] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

[0102] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. An automatic fault detection system for outdoor column speakers, characterized in that: include: A sound column and a server; wherein the sound column includes a main control chip, a power amplifier module, a speaker unit and a detection circuit; The server is used to send digital signals to the sound column via the network; The main control chip is used to decode the digital signal into an audio signal; determine whether the main control chip, the power amplifier module and the speaker unit are faulty according to the detection signal transmitted by the detection circuit, and send the judgment result to the server via the network; The power amplifier module is used to amplify the audio signal to obtain an amplified signal; The speaker unit is used to convert the amplified signal into a sound signal and play it; The detection circuit is used to collect and detect the audio signal, the amplified signal and the sound signal, and transmit the obtained detection signal to the main control chip; The detection circuit includes a first detection circuit, a second detection circuit and a third detection circuit; The first detection circuit is used to collect and detect the audio signal to obtain a first detection signal, and transmit the first detection signal to the first IO port of the main control chip; The second detection circuit is used to collect and detect the amplified signal to obtain a second detection signal, and transmit the second detection signal to the second IO port of the main control chip; The third detection circuit is used to collect and detect the sound signal to obtain a third detection signal, and transmit the third detection signal to the third IO port of the main control chip; The main control chip is used to determine whether the main control chip, the power amplifier module or the speaker unit is faulty according to whether there are signals at the first IO port, the second IO port and the third IO port; Among them, if the first IO port detects a signal, but the second IO port and the third IO port do not detect a signal, it is judged that the main control chip is operating normally, but the power amplifier module or the speaker unit is faulty; if the first IO port and the second IO port detect a signal, but the third IO port does not detect a signal, it is judged that the speaker unit is faulty; if no signal is detected at any of the three IO ports, it is judged that the main control chip is faulty, or it is judged that the main control chip, the power amplifier module or the speaker unit are all faulty.

2. The automatic fault detection system for outdoor column sound according to claim 1, characterized in that: The system further includes a display terminal; The display terminal is connected to the server and is used to display the judgment result to inform maintenance personnel of the fault condition of the sound column.

3. The automatic fault detection system for outdoor column sound according to claim 1, characterized in that: The power amplifier module includes an operational amplifier and a power amplifier; The operational amplifier is used to amplify the audio signal to obtain a primary signal; The power amplifier is used to amplify the primary signal to obtain the amplified signal.

4. The automatic fault detection system for outdoor column speakers according to claim 1, characterized in that: The main control chip includes a network module and an audio decoding module; The network module is configured to receive the digital signal sent by the server and send the judgment result to the server; The audio decoding module is used to decode the digital signal into an audio signal.

5. The automatic fault detection system for outdoor column speakers according to claim 4, characterized in that: The network module adopts an RJ45 network port.

6. The automatic fault detection system for outdoor column speakers according to claim 4, characterized in that: The main control chip further includes a main control module DRAM, which is used to store the digital signal.

7. A method for automatically detecting faults of outdoor column speakers, characterized in that: A main control chip applied to an automatic fault detection system for an outdoor column sound as claimed in any one of claims 1 to 6, the method comprising: Receive digital signals sent by the server; Decoding the digital signal into an audio signal and transmitting the signal to the power amplifier module, so that the power amplifier module amplifies the audio signal to obtain an amplified signal and the speaker unit converts the amplified signal into a sound signal; receiving a detection signal of a detection circuit for the digital signal, the amplified signal, and the sound signal; It is determined whether the main control chip, the power amplifier module and the speaker unit are faulty according to the detection signal.

8. The method for automatic fault detection of outdoor column sound according to claim 7, characterized in that: The method further comprises: The judgment result obtained according to the detection signal is sent to the server, so that the server displays the judgment result through a display terminal.

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