Audio system with power supply intelligent switching and multi-protection functions

Abstract

The invention discloses an audio system with power supply intelligent switching and multiple protection functions, comprising an audio input module used for receiving an external audio signal; the audio processing module is used for processing the received audio signal; the power amplification module is used for amplifying the signal output by the audio processing module; the audio output module is used for playing the amplified audio signal; the power supply parameter acquisition module is used for acquiring operation parameters of each path of power supply; the power supply scoring module is used for performing weighted scoring on the power supply parameter set; the power supply switching control module is used for realizing smooth switching of a power supply; the state monitoring module is used for collecting system operation parameters; the protection control module is used for judging a protection condition and feeding back a fault state; the linkage regulation and control module is used for adjusting scoring parameters or controlling the operation state of the audio module; and the state recovery module is used for clearing the fault state mark after the system recovers to be normal. According to the invention, intelligent power supply and protection of the audio system are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power management and control, and in particular to an audio system with intelligent power switching and multiple protection functions. Background Art

[0002] Audio systems are widely used in consumer electronics, in-car entertainment, conference systems, outdoor broadcasting, smart homes, and other scenarios. Their core function is to receive, process, amplify, and output audio signals, providing a high-quality sound playback experience. Traditional audio systems mostly use a single power supply method, such as a mains adapter or lithium battery. Although this meets basic playback requirements, in complex application environments, especially portable, mobile, outdoor, or multi-source power supply scenarios, such systems often suffer from poor power adaptability and unstable operation. In recent years, with the rapid development of products such as Bluetooth speakers, smart speakers, in-car systems, and emergency communication equipment, higher requirements have been placed on audio systems in terms of power supply reliability, circuit safety, and audio uninterrupted capabilities.

[0003] In a typical multi-source audio system, devices may support multiple power interfaces, including mains power, USB power, solar power, and lithium batteries. Users expect the system to switch freely between these power sources, for example, automatically switching to a backup battery when the main power source fails to maintain audio playback continuity. However, existing power management mechanisms in audio systems are typically simplistic, often employing physical switching or fixed-priority switching. These systems lack intelligent judgment based on real-time power status and struggle to achieve truly seamless switching. Instability in the power supply or delayed switching can easily lead to audio interruption, signal distortion, or system reboots, impacting the user experience and even causing device malfunctions.

[0004] Furthermore, with the increasing diversity of power sources, audio systems face increased electrical risks during operation, such as input overvoltage, output overcurrent, system overheating, momentary short circuits, and battery over-discharge. If system protection mechanisms are inadequate or unresponsive, the consequences could range from malfunctioning audio modules to serious damage, such as amplifier burnout, battery damage, and main control board failure. While some current audio products integrate basic electrical protection features, these are often discrete designs lacking centralized control and linkage capabilities. They typically only respond to single anomalies, making it difficult to comprehensively assess and coordinate actions across multiple conditions. For example, when the system temperature is too high, traditional protection mechanisms simply shut down the power supply, rather than comprehensively assessing multiple factors, such as the temperature rise trend, current power load, and power supply status, to implement more rational response strategies, such as intelligent power reduction and gradual load shedding.

[0005] Furthermore, in the actual application of audio systems, the changes in power consumption of the audio signal processing module and the power amplifier module are closely related to the power supply status. In existing systems, the audio part and the power control part are often independent of each other, lacking a linkage mechanism, and cannot automatically adjust the operating strategy of the audio module according to the quality of the power supply. For example, when the system switches from USB power supply to battery power supply, if high power output is still maintained, it is easy to cause the battery to over-discharge or discharge too quickly, reducing the battery life and stability of the device. Existing solutions rarely consider dynamically adapting audio processing parameters, adjusting the amplification power, or temporarily entering low-power audio mode after the power supply is switched, which means that the overall stability and adaptability of the system still have a lot of room for improvement.

[0006] Currently, a few high-end audio products in the industry have begun to incorporate technologies such as power identification, current monitoring, and temperature sensing, but these technologies generally remain at the basic level and have yet to form a unified and coordinated system architecture. In areas such as portable audio, in-vehicle multi-power systems, and outdoor audio terminals, there is an urgent need for an integrated audio system solution that features intelligent power source selection, seamless power supply switching, multi-dimensional protection, and coordinated adjustment of audio modules.

[0007] Therefore, how to provide an audio system with intelligent power switching and multiple protection functions is a problem that those skilled in the art need to solve urgently. Summary of the Invention

[0008] One purpose of the present invention is to propose an audio system with intelligent power switching and multiple protection functions. The present invention makes full use of the combined mechanism of weighted scoring algorithm and conditional trigger model. By constructing a power status scoring system and a system operation status monitoring mechanism, it realizes intelligent judgment and seamless switching between multiple power supplies, and is linked with the audio signal processing module and the power amplification module for regulation. It describes in detail the control method for ensuring audio playback continuity and system safety under different power supply states and abnormal operating conditions. It has the advantages of stable switching, timely protection response, high structural integration and adaptability to complex environments.

[0009] An audio system with intelligent power switching and multiple protection functions according to an embodiment of the present invention includes:

[0010] Audio input module, used for receiving external audio signals;

[0011] An audio processing module, used for processing received audio signals;

[0012] A power amplifier module, used to amplify the audio signal output by the audio processing module;

[0013] Audio output module, used to play the audio signal after power amplification;

[0014] Power supply parameter acquisition module, used to collect real-time operating parameter information of each power supply;

[0015] A power scoring module is used to receive a power parameter set and score each power source according to a preset weighted scoring rule;

[0016] The power supply switching control module is used to realize the smooth switching from the current power supply to the current target power supply;

[0017] Condition monitoring module, used to collect system operating parameters;

[0018] The protection control module is used to determine the protection triggering conditions, execute the protection action, and feed back the fault status flag to the power scoring module;

[0019] A linkage control module is used to adjust the weight of scoring parameters or control the operating status of the audio processing module and the power amplification module;

[0020] The status recovery module is used to clear the fault status flag after the system operation status returns to normal.

[0021] Optionally, modules can be connected using the following methods:

[0022] S1. Collect real-time parameter information of each power input and record it as a power parameter set;

[0023] S2. Input the power supply parameter set into the scoring module, perform weighted calculation on each power supply using a weighted scoring algorithm to obtain a power supply score set, compare all power supply scores based on the power supply score set, and generate a power supply switching request;

[0024] S3. After the power switching request is generated, the power smooth switching mechanism is started, and the operating status parameters of the audio system are collected to form a system operating status set;

[0025] S4. Perform condition judgment based on the system operation status set, execute protection action, and output fault status flag;

[0026] S5. Feedback the fault status flag to the scoring module, which modifies the power weight parameters and recalculates the power score value based on the updated parameters to obtain a modified power score set.

[0027] S6. When the system operation status returns to normal, the fault status flag is automatically cleared, the scoring module restores the standard weight parameters, and re-executes the scoring and selection operations for the power supply.

[0028] Optionally, the S2 specifically includes:

[0029] S21, the power parameter set P iInput to the scoring module, the power parameter set consists of the operating status of multiple power supplies, including power voltage, power current, power stability factor, power availability factor and power priority factor;

[0030] S22, for the feature vector group P i Perform normalization to obtain the normalized vector P' i , where each value is mapped to the interval [0,1];

[0031] S23. Define the power stability score:

[0032]

[0033] Among them, σ i (t) is the power supply stability score, i is the i-th power supply, t is time, V is voltage, I is current, T is the calculation window time, V nominal is the system rated voltage, I nominal is the system rated current;

[0034] S23, using weighted scoring algorithm to normalize the power parameter set P' i Calculate and get the score value of each power supply:

[0035] Score i (t) = w V (t)·V i +w I I i +w s ·σ i (t)+w c c i +w h ·h i ;

[0036] Among them, Score i (t) is the rating value of the power supply, w V is the voltage weight coefficient, w I is the current weight coefficient, w s is the stability score weight, w c is the weight coefficient of the availability factor, w h is the priority weight coefficient, c is the availability, and h is the priority coefficient of the power supply;

[0037] S25. Collect the score values calculated for all power sources at the current time t to form a power source score set S;

[0038] S26. Sort the power source score set S and select the power source with the highest score. If the current power source with the highest score is different from the target power source at the previous moment, generate a power switching request. If the current power source with the highest score is the same as the target power source at the previous moment, maintain the current power supply state and do not generate a power switching request.

[0039] Optionally, the S3 specifically includes:

[0040] S31. Based on the power switching request, the system controls the buffer capacitor to precharge the target power supply, and simultaneously collects the target power supply voltage, current change rate, and load current change rate in real time to construct a linkage control function:

[0041]

[0042] Among them, F sw (t) is the power switching execution condition function, R b is the buffer loop resistance, C b is the buffer capacitor value, T is the calculation window time, t is the time, V is the target voltage, I is the target current, I out is the system output current, α is the maximum allowable current change rate;

[0043] S32. Based on the power switching execution condition function, during the power switching process, the system controls the audio output voltage disturbance and establishes a disturbance tolerance function:

[0044]

[0045] Where Ψ(t) is the second-order disturbance of the audio output voltage within the unit time window, V out is the system output voltage, δ is the detection period, and β is the upper limit of the disturbance tolerance;

[0046] S33. After the power supply is switched, the current state of the system is collected, a system operation state set is constructed, and the system stability score is calculated based on the switching function and the disturbance function:

[0047]

[0048] Where Γ(t) is the current system stability score, and ω1 and ω2 are weighting coefficients.

[0049] Optionally, the S4 specifically includes:

[0050] S41. Based on the system operation status set, the system collects power supply scores, voltage transients, current transients, load power changes, and power supply stability scores in real time during operation to construct a protection judgment function:

[0051]

[0052] Among them, P protect (t) is the protection judgment value, λ1, λ2, λ3, λ4 are protection weight factors, V out is the system output voltage, I out is the system output current, t is time, i is the i-th power supply, σ i (t) is the power supply stability score, Γ(t) is the current system stability score;

[0053] S42. Introduce dynamic protection thresholds based on the power supply conditions faced by the system:

[0054]

[0055] Among them, P th (t) is the dynamic protection threshold, P th,0 is the initially set protection threshold, κ is the dynamic adjustment coefficient, N is the total number of available power supplies in the system, and j is the jth power supply;

[0056] S43, when the protection judgment value P protect Exceeding the dynamic protection threshold P th When the system executes protection measures, if the output voltage change rate exceeds the safe range, the system performs current limiting protection. If the power supply stability score is lower than the minimum stability threshold, the system marks the power supply as unstable and triggers a score update. If the score change rate exceeds the maximum allowable value, the system enters power limiting mode.

[0057] S44, based on the system entering the protection state, the scoring module dynamically adjusts the scoring weight according to the current system state. At each new moment, the system will add a correction value determined by the current protection state to the stability scoring weight of the previous moment. When the protection judgment value P protect Exceeding the dynamic threshold P th When the correction amount is positive, the system will increase the proportion of the stability score in the overall score. When the system is in a stable state, the correction amount is negative, and the system will reduce the proportion of the stability score in the overall score.

[0058] Optionally, the S5 specifically includes:

[0059] S51. After executing the protection action, the system monitors the power supply status in real time, including the power supply stability score, voltage / current fluctuation, and audio output status, and establishes a fault recovery evaluation function:

[0060]

[0061] Among them, R recoveer (t) is the fault recovery evaluation value, μ1, μ2, μ2 are the recovery evaluation weight factors, V outis the system output voltage, I out is the system output current, t is the time, V nominal is the system rated voltage, I nominal is the system rated current, i is the i-th power supply, σ i (t) is the power supply stability score, P protect (t) is the protection judgment value, P th (t) is the dynamic protection threshold;

[0062] S52: Based on the fault recovery evaluation function, if the fault recovery evaluation value R is satisfied at time t recoveer Greater than the fault recovery threshold R th , the system exits the current limiting mode and recovers the load current in an exponential back-off manner;

[0063] S53, the power supply score value obtained based on the weighted scoring algorithm i When exiting the protection mode, the system re-evaluates the power rating and adjusts the stability factor w in the rating formula. s Perform adaptive callback;

[0064] S54. For the battery score after callback, the system updates the power score set, recalculates the priority of each power source based on the power score formula, and updates the entire power score set to obtain a revised power score set.

[0065] Optionally, the S6 specifically includes:

[0066] S61, based on the protection determination value and the dynamic protection threshold, when the protection determination value P protect Exceeding the dynamic protection threshold P th Duration T f Exceeds the set time threshold T th When the system records the current fault status, and triggers the score freezing mechanism, the frozen score value is obtained.

[0067] S62. Restore the score value based on the historical score curve and construct a score recovery function. When the system returns to normal, the score value re-enters the normal score calculation formula and the frozen state is released:

[0068]

[0069] in, Score the restored power supply. is the frozen score value, ξ1, ξ2 are score recovery adjustment factors, t f is the time when the fault occurred;

[0070] S63: Based on the system releasing the score freeze state, score using the restored power supply Score value of the power supply i , and incorporate it into the revised power score set. The system reorders the power priorities based on the revised power score set, determines the current target power source, and completes the full update of the scoring logic.

[0071] The beneficial effects of the present invention are:

[0072] The present invention constructs an intelligent power source selection mechanism centered on a weighted scoring algorithm and introduces a conditional trigger model to achieve multi-dimensional system protection control. This establishes a linkage between the various modules within the audio system, enabling dynamic evaluation and optimal selection of power sources in multiple power input scenarios. Each power source can be scored based on parameters such as voltage, current, stability, and remaining battery life, enabling rapid switching decisions when power status changes or a power source fails. Furthermore, the present invention monitors the operating status of the audio system in real time, including parameters such as input voltage, output current, temperature, and load. When an operational anomaly is detected, the protection control logic is immediately triggered, and the fault status is fed back to the scoring module for adjustment of power supply decisions and audio output strategies. The audio processing module and power amplifier module dynamically adjust signal processing parameters and output power based on the current power status and protection feedback information, thereby maintaining the stability and continuity of audio output during power switching or system protection actions. This systematic approach not only effectively improves the power supply adaptability and operational safety of the audio system in complex application scenarios, but also ensures uninterrupted and undistorted audio playback, enhancing the overall system intelligence and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0074] Figure 1 This is a flowchart of a method for an audio system with intelligent power switching and multiple protection functions proposed by the present invention;

[0075] Figure 2 This is a system diagram of an audio system with intelligent power switching and multiple protection functions proposed by the present invention. DETAILED DESCRIPTION

[0076] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0077] refer to Figure 1 and Figure 2, an audio system with intelligent power switching and multiple protection functions, including:

[0078] Audio input module, used for receiving external audio signals;

[0079] An audio processing module, used for processing received audio signals;

[0080] A power amplifier module, used to amplify the audio signal output by the audio processing module;

[0081] Audio output module, used to play the audio signal after power amplification;

[0082] Power supply parameter acquisition module, used to collect real-time operating parameter information of each power supply;

[0083] A power scoring module is used to receive a power parameter set and score each power source according to a preset weighted scoring rule;

[0084] The power supply switching control module is used to realize the smooth switching from the current power supply to the current target power supply;

[0085] Condition monitoring module, used to collect system operating parameters;

[0086] The protection control module is used to determine the protection triggering conditions, execute the protection action, and feed back the fault status flag to the power scoring module;

[0087] A linkage control module is used to adjust the weight of scoring parameters or control the operating status of the audio processing module and the power amplification module;

[0088] The status recovery module is used to clear the fault status flag after the system operation status returns to normal.

[0089] The present invention provides an audio system with intelligent power switching and multiple protection functions, which integrates audio signal processing, power status recognition, intelligent scoring and protection control functions, and realizes the deep integration of audio playback and power management. The system completes the core process of audio playback through audio input, processing, amplification and output modules, and introduces power parameter collection and weighted scoring mechanism to evaluate the status of multiple power supplies in real time to ensure the selection of the optimal power supply path. At the same time, the system monitors key parameters such as voltage, current, power, temperature in real time through the status monitoring and condition judgment module, and triggers protection actions in time when an abnormality occurs, effectively ensuring the safety of system operation. Through the linkage control module, the system can dynamically adjust the audio processing and amplification strategy during the power switching or protection process to avoid playback interruption or sound quality degradation. The state recovery mechanism ensures that the system automatically returns to a stable working state after the abnormality is resolved, thereby improving system reliability and user experience. The system is widely applicable to multi-scenario audio applications such as portable audio, vehicle-mounted equipment, conference audio systems, etc., and has the advantages of high intelligence, fast response speed, and strong safety and stability.

[0090] In this embodiment, the modules are connected through the following methods:

[0091] S1. Collect real-time parameter information of each power input and record it as a power parameter set;

[0092] S2. Input the power supply parameter set into the scoring module, perform weighted calculation on each power supply using a weighted scoring algorithm to obtain a power supply score set, compare all power supply scores based on the power supply score set, and generate a power supply switching request;

[0093] S3. After the power switching request is generated, the power smooth switching mechanism is started, and the operating status parameters of the audio system are collected to form a system operating status set;

[0094] S4. Perform condition judgment based on the system operation status set, execute protection action, and output fault status flag;

[0095] S5. Feedback the fault status flag to the scoring module, which modifies the power weight parameters and recalculates the power score value based on the updated parameters to obtain a modified power score set.

[0096] S6. When the system operation status returns to normal, the fault status flag is automatically cleared, the scoring module restores the standard weight parameters, and re-executes the scoring and selection operations for the power supply.

[0097] The present invention provides an audio system control method with intelligent power switching and multiple protection functions. Based on a weighted scoring algorithm and a conditional trigger model, it realizes intelligent power supply and fault linkage control of the audio system in a multi-power input scenario. The method collects power supply parameters in real time, constructs a power supply scoring set, realizes automatic selection and switching of the optimal power supply, and collects the system operating status during the switching process to ensure uninterrupted audio playback. When an abnormal operation is detected, the system can immediately trigger a protection action and feed back the fault status to the scoring module, dynamically correct the scoring strategy, and improve the accuracy and safety of the switching decision. After the operating status is restored, the system automatically clears the fault flag and restores the standard scoring logic to achieve closed-loop control. This method has the advantages of fast response, smooth switching, and strong fault resistance. It significantly improves the stability and intelligence level of the audio system and is suitable for the application requirements of multi-scenario and high-reliability audio equipment.

[0098] In this embodiment, S2 specifically includes:

[0099] S21, the power parameter set P i Input to the scoring module, the power parameter set consists of the operating status of multiple power supplies, including power voltage, power current, power stability factor, power availability factor and power priority factor;

[0100] S22, for the feature vector group P i Perform normalization to obtain the normalized vector P' i , where each value is mapped to the interval [0,1];

[0101] S23. Define the power stability score:

[0102]

[0103] Among them, σ i (t) is the power supply stability score, i is the i-th power supply, t is time, V is voltage, I is current, T is the calculation window time, V nominal is the system rated voltage, I nominal is the system rated current;

[0104] S23, using weighted scoring algorithm to normalize the power parameter set P' i Calculate and get the score value of each power supply:

[0105] Score i (t) = w V (t)·V i +w I I i +w s ·σ i (t)+w c ci +w h ·h i ;

[0106] Among them, Score i (t) is the rating value of the power supply, w V is the voltage weight coefficient, w I is the current weight coefficient, w s is the stability score weight, w c is the weight coefficient of the availability factor, w h is the priority weight coefficient, c is the availability, and h is the priority coefficient of the power supply;

[0107] S25. Collect the score values calculated for all power sources at the current time t to form a power source score set S;

[0108] S26. Sort the power source score set S and select the power source with the highest score. If the current power source with the highest score is different from the target power source at the previous moment, generate a power switching request. If the current power source with the highest score is the same as the target power source at the previous moment, maintain the current power supply state and do not generate a power switching request.

[0109] The power scoring method proposed in the present invention constructs an intelligent power supply scoring mechanism for multi-power input scenarios of audio systems by introducing feature vector normalization processing, power supply stability calculation formula and weighted scoring algorithm. The system first normalizes the voltage, current, stability, availability and priority factors of the power supply to ensure that data of different dimensions are processed under the same standard. By setting a voltage and current deviation calculation model based on window time, the power supply stability score is accurately quantified, and the system's perception of short-term fluctuations is improved. Subsequently, a weighted scoring algorithm is used to integrate the various factors and dynamically generate the score values of each power supply to form a power supply scoring set. After the scoring set is sorted, the optimal power supply is selected. If it is inconsistent with the current power supply, a switching request is automatically triggered to achieve intelligent decision-making. The method of the present invention realizes comprehensive judgment of multi-dimensional power supply status, improves the scientificity and real-time nature of power supply selection, and effectively enhances the stable operation capability of the audio system in a complex power supply environment.

[0110] In this embodiment, S3 specifically includes:

[0111] S31. Based on the power switching request, the system controls the buffer capacitor to precharge the target power supply, and simultaneously collects the target power supply voltage, current change rate, and load current change rate in real time to construct a linkage control function:

[0112]

[0113] Among them, F sw (t) is the power switching execution condition function, Rb is the buffer loop resistance, C b is the buffer capacitor value, T is the calculation window time, t is the time, V is the target voltage, I is the target current, I out is the system output current, α is the maximum allowable current change rate;

[0114] S32. Based on the power switching execution condition function, during the power switching process, the system controls the audio output voltage disturbance and establishes a disturbance tolerance function:

[0115]

[0116] Where Ψ(t) is the second-order disturbance of the audio output voltage within the unit time window, V out is the system output voltage, δ is the detection period, and β is the upper limit of the disturbance tolerance;

[0117] S33. After the power supply is switched, the current state of the system is collected, a system operation state set is constructed, and the system stability score is calculated based on the switching function and the disturbance function:

[0118]

[0119] Where Γ(t) is the current system stability score, and ω1 and ω2 are weighting coefficients.

[0120] The present invention proposes a method for smooth control and stability evaluation during power switching, which realizes the continuity assurance and quality control of the audio system during the power switching process by constructing a buffer pre-charge control function, an audio disturbance tolerance function and a system stability scoring function. After receiving the power switching request, the system first uses a buffer capacitor to pre-charge the target power supply, and monitors the voltage, current and load change rate in real time, calculates the power switching execution condition function, and ensures that the switching action is completed under controlled conditions. In order to avoid the audio output disturbance affecting the user experience, the system constructs a disturbance tolerance function to control the disturbance amplitude of the output voltage per unit time not to exceed the set upper limit. After the switching is completed, the system generates a system stability score based on the results of the above functions, quantifies the switching effect, and provides a basis for subsequent adjustments. This method significantly improves the smoothness, reliability and protection of the audio output of the power switching, and ensures the stable operation and high-quality output of the audio system during the switching process.

[0121] In this embodiment, the S4 specifically includes:

[0122] S41. Based on the system operation status set, the system collects power supply scores, voltage transients, current transients, load power changes, and power supply stability scores in real time during operation to construct a protection judgment function:

[0123]

[0124] Among them, P protect (t) is the protection judgment value, λ1, λ2, λ3, λ4 are protection weight factors, V out is the system output voltage, I out is the system output current, t is time, i is the i-th power supply, σ i (t) is the power supply stability score, Γ(t) is the current system stability score;

[0125] S42. Introduce dynamic protection thresholds based on the power supply conditions faced by the system:

[0126]

[0127] Among them, P th (t) is the dynamic protection threshold, P th,0 is the initially set protection threshold, κ is the dynamic adjustment coefficient, N is the total number of available power supplies in the system, and j is the jth power supply;

[0128] S43, when the protection judgment value P protect Exceeding the dynamic protection threshold P th When the system executes protection measures, if the output voltage change rate exceeds the safe range, the system performs current limiting protection. If the power supply stability score is lower than the minimum stability threshold, the system marks the power supply as unstable and triggers a score update. If the score change rate exceeds the maximum allowable value, the system enters power limiting mode.

[0129] S44, based on the system entering the protection state, the scoring module dynamically adjusts the scoring weight according to the current system state. At each new moment, the system will add a correction value determined by the current protection state to the stability scoring weight of the previous moment. When the protection judgment value P protect Exceeding the dynamic threshold P th When the correction amount is positive, the system will increase the proportion of the stability score in the overall score. When the system is in a stable state, the correction amount is negative, and the system will reduce the proportion of the stability score in the overall score.

[0130] The operating status-driven protection judgment and dynamic score adjustment method proposed in the present invention constructs a protection judgment function based on multi-dimensional system status parameters and introduces a dynamic protection threshold, so that the audio system has stronger fault perception and adaptability when facing complex power supply changes. The system collects key indicators such as power supply score, voltage and current transients, load changes and stability score in real time, comprehensively calculates the protection judgment value through protection weight factors, and dynamically adjusts the protection threshold according to the number of available power supplies to make the protection response more sensitive. When the judgment value exceeds the threshold, the system can perform refined protection operations such as current limiting and power limiting, and at the same time trigger the scoring module to update the unstable power supply score. By constructing a scoring weight adaptive adjustment function, the system can intelligently adjust the scoring logic after entering the protection state to avoid the repeated selection of unstable power supplies. This method improves the active protection capability and scoring decision reliability of the audio system during abnormal operation, and enhances the system robustness and overall operational safety.

[0131] In this embodiment, the S5 specifically includes:

[0132] S51. After executing the protection action, the system monitors the power supply status in real time, including the power supply stability score, voltage / current fluctuation, and audio output status, and establishes a fault recovery evaluation function:

[0133]

[0134] Among them, R recoveer (t) is the fault recovery evaluation value, μ1, μ2, μ2 are the recovery evaluation weight factors, V out is the system output voltage, I out is the system output current, t is the time, V nominal is the system rated voltage, I nominal is the system rated current, i is the i-th power supply, σ i (t) is the power supply stability score, P protect (t) is the protection judgment value, P th (t) is the dynamic protection threshold;

[0135] S52: Based on the fault recovery evaluation function, if the fault recovery evaluation value R is satisfied at time t recoveer Greater than the fault recovery threshold R th , the system exits the current limiting mode and recovers the load current in an exponential back-off manner;

[0136] S53, the power supply score value obtained based on the weighted scoring algorithm i When exiting the protection mode, the system re-evaluates the power rating and adjusts the stability factor w in the rating formula. s Perform adaptive callback;

[0137] S54. For the battery score after callback, the system updates the power score set, recalculates the priority of each power source based on the power score formula, and updates the entire power score set to obtain a revised power score set.

[0138] The fault recovery evaluation and scoring callback method proposed in the present invention realizes intelligent exit and dynamic correction of scoring strategies after system protection by constructing a fault recovery evaluation function and comprehensively monitoring power supply stability, voltage and current fluctuations and audio output status. After the protection action is executed, the system continuously evaluates the operating status, calculates the recovery evaluation value, and when the recovery evaluation value exceeds the set threshold, starts the current limit release and load current index fallback strategy to smoothly restore normal working state. Subsequently, based on the latest power supply scoring results, the system adaptively calls back the stability factor in the scoring formula to avoid excessive penalties and improve the recovery ability and dynamic adjustability of the scoring system. The power supply priority is re-sorted through the updated scoring set to ensure that the system can re-select the optimal power supply path after exiting the protection state. The method of the present invention enhances the decision-making intelligence and scoring robustness of the audio system in the abnormal state recovery process, and improves the overall operating efficiency and stability of the system.

[0139] In this embodiment, S6 specifically includes:

[0140] S61, based on the protection determination value and the dynamic protection threshold, when the protection determination value P protect Exceeding the dynamic protection threshold P th Duration T f Exceeds the set time threshold T th When the system records the current fault status, and triggers the score freezing mechanism, the frozen score value is obtained.

[0141] S62. Restore the score value based on the historical score curve and construct a score recovery function. When the system returns to normal, the score value re-enters the normal score calculation formula and the frozen state is released:

[0142]

[0143] in, Score the restored power supply. is the frozen score value, ξ1, ξ2 are score recovery adjustment factors, t f is the time when the fault occurred;

[0144] S63: Based on the system releasing the score freeze state, score using the restored power supply Score value of the power supply i , and incorporate it into the revised power score set. The system reorders the power priorities based on the revised power score set, determines the current target power source, and completes the full update of the scoring logic.

[0145] The score correction and freeze recovery mechanism proposed in the present invention realizes the stable control and recovery management of the power score of the audio system under frequent abnormal conditions by constructing a score correction function, a score freezing function and a score recovery function. During operation, the system dynamically corrects the power score based on the real-time protection judgment value and historical data to avoid excessive fluctuations in the score caused by sudden conditions. When the protection judgment value exceeds the dynamic threshold and lasts for more than the set time, the system triggers the score freezing mechanism, records the current score status and prevents further changes to prevent the score from misleading the system switching decision. After the system recovers, a score recovery function is constructed based on the historical score curve to smoothly adjust the frozen score value so that it gradually returns to the normal score track. This method effectively improves the stability and fault tolerance of the scoring system in a variable power supply environment, avoids repeated power switching and misjudgment caused by frequent score changes, and significantly improves the continuity and reliability of the audio system in complex scenarios.

[0146] Example 1:

[0147] In order to verify the feasibility of the present invention in implementation, the present invention was applied to the emergency broadcast and multi-scene sound reinforcement system upgrade project in a coastal city. The city is located in a typhoon-prone area. The Municipal Emergency Management Bureau has deployed 120 sets of mobile audio broadcast terminal systems in urban areas, parks, tunnel entrances, flood control and rescue areas and other places to achieve tasks such as early warning notifications, on-site sound reinforcement, command and dispatch, and emergency publicity. Since the system runs outdoors for a long time and the power supply environment is complex and unstable, common problems include large voltage fluctuations, frequent power switching resulting in audio interruption, or imperfect protection mechanisms when power failure occurs, which poses a risk of broadcast interruption and equipment damage.

[0148] The system of the present invention is integrated into 60 sets of terminal devices, replacing the original traditional audio power management module. These terminals support three types of power input: AC power, lithium battery and solar power. Before the application of the present invention, the original system often encountered problems such as audio freeze, delayed recovery, inaccurate power identification, etc. during the power switching process. Some devices even damaged the internal power amplifier board due to overvoltage or short circuit. After introducing the power scoring and linkage protection mechanism of the present invention, the system collects the voltage, current, stability, and remaining power of the power supply in real time, and automatically evaluates the power supply quality of each power supply according to the weighted scoring model, and selects the optimal power supply. When it is detected that the current power stability score is lower than the threshold of 0.6 twice in a row, and the voltage change rate exceeds 1.0V / s, the system will issue a switching warning in advance and complete the smooth switching process to the backup power supply within 20ms. During this period, the disturbance control algorithm is used to ensure that the audio output is not affected.

[0149] During an actual drill, a site encountered a typhoon landfall for three consecutive days in early July. The solar power supply system was affected by the severe weather and experienced frequent voltage drops, and the original system experienced multiple playback interruptions and restarts. However, the site deploying the system of the present invention automatically completed 8 power switchings under the same conditions, the audio broadcast was not interrupted, the system power amplifier module temperature was always maintained below 65°C, and there was no amplifier downtime after any protection was triggered. In particular, during an emergency drill in a tunnel, due to a power outage in the mains, the system switched to battery power and automatically entered power regulation mode, reducing the broadcast volume to 75%, extending the battery life by 20 minutes, and ensuring the continuity of on-site information transmission.

[0150] To form an effective evaluation, we conducted a six-month horizontal comparative monitoring of 60 terminals using the system of the present invention deployed in the city and the remaining 60 terminals using traditional systems, covering dimensions such as system stability, power switching efficiency, audio uninterrupted rate, and protection trigger response accuracy.

[0151] Below is the corresponding "Audio System Performance Comparison Measured Data Table in Complex Power Supply Environments".

[0152] Table 1 Comparison of audio system performance under complex power supply environment

[0153]

[0154]

[0155] The above test results demonstrate that the system of the present invention demonstrates excellent stability, adaptability, and intelligence in multi-scenario urban emergency audio applications. In particular, in complex environments with frequently changing power supply conditions, it successfully resolves issues such as slow power switching, misselected power sources, delayed protection responses, and audio playback interruptions in traditional systems. The implementation of the system of the present invention not only improves the continuity and safety of the broadcast system, but also reduces failure rates and subsequent maintenance costs, demonstrating its excellent engineering application value and potential for widespread adoption.

[0156] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An audio system with intelligent power switching and multiple protection functions, characterized in that: include: Audio input module, used for receiving external audio signals; An audio processing module, used for processing received audio signals; A power amplifier module, used to amplify the audio signal output by the audio processing module; Audio output module, used to play the audio signal after power amplification; Power supply parameter acquisition module, used to collect real-time operating parameter information of each power supply; A power scoring module is used to receive a power parameter set and score each power source according to a preset weighted scoring rule; The power supply switching control module is used to realize the smooth switching from the current power supply to the current target power supply; Condition monitoring module, used to collect system operating parameters; The protection control module is used to determine the protection triggering conditions, execute the protection action, and feed back the fault status flag to the power scoring module; A linkage control module is used to adjust the weight of scoring parameters or control the operating status of the audio processing module and the power amplification module; The status recovery module is used to clear the fault status flag after the system operation status returns to normal.

2. The audio system with intelligent power switching and multiple protection functions according to claim 1, characterized in that: The modules are implemented as follows: S1. Collect real-time parameter information of each power input and record it as a power parameter set; S2. Input the power supply parameter set into the scoring module, perform weighted calculation on each power supply using a weighted scoring algorithm to obtain a power supply score set, compare all power supply scores based on the power supply score set, and generate a power supply switching request; S3. After the power switching request is generated, the power smooth switching mechanism is started, and the operating status parameters of the audio system are collected to form a system operating status set; S4. Perform condition judgment based on the system operation status set, execute protection action, and output fault status flag; S5. Feedback the fault status flag to the scoring module, which modifies the power weight parameters and recalculates the power score value based on the updated parameters to obtain a modified power score set. S6. When the system operation status returns to normal, the fault status flag is automatically cleared, the scoring module restores the standard weight parameters, and re-executes the scoring and selection operations for the power supply.

3. The audio system with intelligent power switching and multiple protection functions according to claim 2, characterized in that: The S2 specifically includes: S21, the power parameter set P i Input to the scoring module, the power parameter set consists of the operating status of multiple power supplies, including power voltage, power current, power stability factor, power availability factor and power priority factor; S22, for the feature vector group P i Perform normalization to obtain the normalized vector P' i , where each value is mapped to the interval [0,1]; S23. Define the power stability score: Among them, σ i (t) is the power supply stability score, i is the i-th power supply, t is time, V is voltage, I is current, T is the calculation window time, V nominal is the system rated voltage, I nominal is the system rated current; S23, using weighted scoring algorithm to normalize the power parameter set P' i Calculate and get the score value of each power supply: Score i (t)=w V (t)·V i +w I ·I i +w s ·σ i (t)+w c ·c i +w h ·h i ; Among them, Score i (t) is the rating value of the power supply, w V is the voltage weight coefficient, w I is the current weight coefficient, w s is the stability score weight, w c is the weight coefficient of the availability factor, w h is the priority weight coefficient, c is the availability, and h is the priority coefficient of the power supply; S25. Collect the score values calculated for all power sources at the current time t to form a power source score set S; S26. Sort the power source score set S and select the power source with the highest score. If the current power source with the highest score is different from the target power source at the previous moment, generate a power switching request. If the current power source with the highest score is the same as the target power source at the previous moment, maintain the current power supply state and do not generate a power switching request.

4. The audio system with intelligent power switching and multiple protection functions according to claim 2, characterized in that: The S3 specifically includes: S31. Based on the power switching request, the system controls the buffer capacitor to precharge the target power supply, and simultaneously collects the target power supply voltage, current change rate, and load current change rate in real time to construct a linkage control function: Among them, F sw (t) is the power switching execution condition function, R b is the buffer loop resistance, C b is the buffer capacitor value, T is the calculation window time, t is the time, V is the target voltage, I is the target current, I out is the system output current, α is the maximum allowable current change rate; S32. Based on the power switching execution condition function, during the power switching process, the system controls the audio output voltage disturbance and establishes a disturbance tolerance function: Where Ψ(t) is the second-order disturbance of the audio output voltage within the unit time window, V out is the system output voltage, δ is the detection period, and β is the upper limit of the disturbance tolerance; S33. After the power supply is switched, the current state of the system is collected, a system operation state set is constructed, and the system stability score is calculated based on the switching function and the disturbance function: Where Γ(t) is the current system stability score, and ω1 and ω2 are weighting coefficients.

5. The audio system with intelligent power switching and multiple protection functions according to claim 2, characterized in that: The S4 specifically includes: S41. Based on the system operation status set, the system collects power supply scores, voltage transients, current transients, load power changes, and power supply stability scores in real time during operation to construct a protection judgment function: Among them, P protect (t) is the protection judgment value, λ1, λ2, λ3, λ4 are protection weight factors, V out is the system output voltage, I out is the system output current, t is time, i is the i-th power supply, σ i (t) is the power supply stability score, Γ(t) is the current system stability score; S42. Introduce dynamic protection thresholds based on the power supply conditions faced by the system: Among them, P th (t) is the dynamic protection threshold, P th,0 is the initially set protection threshold, κ is the dynamic adjustment coefficient, N is the total number of power sources available in the system, and j is the jth power source; S43, when the protection judgment value P protect Exceeding the dynamic protection threshold P th When the system executes protection measures, if the output voltage change rate exceeds the safe range, the system performs current limiting protection. If the power supply stability score is lower than the minimum stability threshold, the system marks the power supply as unstable and triggers a score update. If the score change rate exceeds the maximum allowable value, the system enters power limiting mode. S44, based on the system entering the protection state, the scoring module dynamically adjusts the scoring weight according to the current system state. At each new moment, the system will add a correction value determined by the current protection state to the stability scoring weight of the previous moment. When the protection judgment value P protect Exceeding the dynamic threshold P th When the correction amount is positive, the system will increase the proportion of the stability score in the overall score. When the system is in a stable state, the correction amount is negative, and the system will reduce the proportion of the stability score in the overall score.

6. The audio system with intelligent power switching and multiple protection functions according to claim 2, characterized in that: The S5 specifically includes: S51. After executing the protection action, the system monitors the power supply status in real time, including the power supply stability score, voltage / current fluctuation, and audio output status, and establishes a fault recovery evaluation function: Among them, R recoveer (t) is the fault recovery evaluation value, μ1, μ2, μ2 are the recovery evaluation weight factors, V out is the system output voltage, I out is the system output current, t is the time, V nominal is the system rated voltage, I nominal is the system rated current, i is the i-th power supply, σ i (t) is the power supply stability score, P protect (t) is the protection judgment value, P th (t) is the dynamic protection threshold; S52: Based on the fault recovery evaluation function, if the fault recovery evaluation value R is satisfied at time t recoveer Greater than the fault recovery threshold R th , the system exits the current limiting mode and recovers the load current in an exponential back-off manner; S53, the power supply score value obtained based on the weighted scoring algorithm i When exiting the protection mode, the system re-evaluates the power rating and adjusts the stability factor w in the rating formula. s Perform adaptive callback; S54. For the battery score after callback, the system updates the power score set, recalculates the priority of each power source based on the power score formula, and updates the entire power score set to obtain a revised power score set.

7. The audio system with intelligent power switching and multiple protection functions according to claim 2, characterized in that: The S6 specifically includes: S61, based on the protection determination value and the dynamic protection threshold, when the protection determination value P protect Exceeding the dynamic protection threshold P th Duration T f Exceeds the set time threshold T th When the system records the current fault status, and triggers the score freezing mechanism, the frozen score value is obtained. S62. Restore the score value based on the historical score curve and construct a score recovery function. When the system returns to normal, the score value re-enters the normal score calculation formula and the frozen state is released: in, Score the restored power supply. is the frozen score value, ξ1, ξ2 are score recovery adjustment factors, t f is the time when the fault occurred; S63: Based on the system releasing the score freeze state, score using the restored power supply Score value of the power supply i , and incorporate it into the revised power score set. The system reorders the power priorities based on the revised power score set, determines the current target power source, and completes the full update of the scoring logic.

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