Audio power adjustment method, device and system based on Ethernet power supply

Abstract

The present invention discloses an audio power adjustment method, device, and system based on Power over Ethernet. The method adjusts the input current and output power of a step-down circuit with synchronous rectification by obtaining the type parameters of a self-powered device, collects the peak power required by the power supply switch circuit, and compares it with the effective power supply power of the power supply device. When it is determined that the required power is greater than the power supply power, the supercapacitor is adjusted to a power supply state so that it and the step-down circuit with synchronous rectification can simultaneously power the power supply circuit. The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage of the power supply switch circuit, and the corresponding audio power signal is output through the adjusted audio power amplifier. The input current and output power of the step-down circuit with synchronous rectification are adjusted according to the type parameters of the power supply device, thereby improving the adaptability and compatibility of the system with different types of power supply devices. The power supply switch circuit is supplied with high power by the supercapacitor, realizing power amplification through POE standard technology.

Description

Technical Field

[0001] The present invention relates to the technical field of audio power adjustment, and in particular to a method, device and system for adjusting audio power based on Power over Ethernet. Background Art

[0002] With the rapid development of network technology, PoE (Power over Ethernet) technology has emerged. PoE technology uses Ethernet cable as a transmission medium, which can not only transmit data signals, but also power terminal devices. However, with the increase in power requirements, the traditional POE technology with a maximum power of 15.4W and PoE+ technology with a maximum power of 30W can no longer meet the demand. As an important component of the audio system, the audio power amplifier is used to amplify the audio signal to drive the speaker to produce sound. Traditional audio power amplifiers usually require a separate power supply, which not only increases the complexity and cost of the system, but also limits the application scenarios of audio power amplifiers.

[0003] According to the existing POE standard, there are four types of PSE devices on the market: IEEE 802.3af, IEEE 802.3at, and IEEE 802.3BT. IEEE 802.3BT is further categorized into two different types: 60W and 90W. Under the corresponding extended protocols of these four types of PSE devices, the maximum undistorted power output by active speaker products in the current market, after deducting line losses and efficiency losses at the amplifier end, is far less than the ideal power output. Therefore, how to utilize POE standard power supply technology to power audio power amplifiers and achieve higher audio power output is a pressing issue. Summary of the Invention

[0004] The present invention provides an audio power adjustment method, device and system based on Power over Ethernet, so as to realize the technical effect of powering an audio power amplifier through the power supply technology of the POE standard and improving the output audio signal power.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides an audio power adjustment method based on Power over Ethernet, comprising the following steps:

[0006] Obtaining the device type of the target power supply device, retrieving corresponding type parameters according to the device type, and adjusting the current input current and current output power of the input synchronous rectification buck circuit according to the type parameters;

[0007] collecting the required peak power of the power supply switch circuit in real time, and comparing the required peak power with the effective power supply power of the target power supply device, and when the comparison result shows that the required peak power is greater than the effective power supply power, adjusting the supercapacitor to a power supply state so that the supercapacitor and the input synchronous rectification buck circuit simultaneously power the power supply switch circuit;

[0008] The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage of the power supply switch circuit, and the corresponding audio power signal is outputted through the adjusted output audio power amplifier.

[0009] The audio power adjustment method provided by the present invention first needs to obtain the device type of the power supply device, that is, determine the extended protocol standard corresponding to the power supply device. Since the output power and output voltage of the power supply devices corresponding to different extended protocol standards are different, the system can determine the corresponding type parameters according to the determined device type, that is, determine the various standard parameters that need to be adjusted by the system according to the device type obtained from the target power supply device, including the current input current and current output power of the synchronous rectifier buck circuit input in the system. The current input current and current output power of the synchronous rectifier buck circuit input are adjusted according to the determined type parameters, ensuring that the input current peak and output power of the synchronous rectifier buck circuit do not exceed the protection threshold of the power supply device, avoiding triggering the overcurrent protection function of the power supply device and causing the power supply device to be powered off, affecting the working efficiency of the system, and improving the adaptability and compatibility of the system to different types of power supply devices, ensuring the operational stability of the system.

[0010] After adjusting the input current and output power of the synchronous rectification step-down circuit according to the type parameters of the power supply equipment, the system will also compare the real-time collected peak power demand of the self-powered switching circuit and the effective power supply power of the power supply equipment to determine whether the effective power supply power of the power supply equipment meets the power supply power required by the power supply switching circuit.

[0011] If it is determined based on the comparison results that the current power supply power of the power supply equipment cannot meet the needs of the power supply switch circuit, that is, it cannot meet the needs of the system, the supercapacitor will be adjusted to the power supply state, that is, the input of the supercapacitor is combined with the synchronous rectification and step-down circuit to simultaneously power the power supply switch circuit, thereby increasing the input power of the power supply switch circuit, and then increasing the power supply power of the power supply circuit to the audio amplifier, thereby realizing the amplification of the audio signal power through the POE standard power supply technology.

[0012] After providing high-power power to the power supply circuit, the system will also adjust the voltage gain of the audio amplifier at the output end, i.e., the output audio amplifier, according to the output voltage of the power supply circuit, to avoid clipping distortion of the output audio power signal and improve the stability of the system's output audio signal.

[0013] As a preferred example, adjusting the current input current and the current output power of the input synchronous rectification buck circuit according to the type parameter specifically includes:

[0014] Adjusting the initial input current threshold and the initial output power threshold of the input step-down circuit with synchronous rectification according to the type parameter to obtain a first input current threshold and a first output power threshold;

[0015] The current input current and the current output power of the input synchronous rectification step-down circuit are acquired in real time, and the current input current and the current output power are limited and adjusted according to the first input current threshold and the first output power threshold respectively to obtain the first input current and the first output power.

[0016] After determining the type parameters of the target power supply equipment, the system adjusts the system input with synchronous rectification buck circuit according to the type parameters, that is, the input current threshold and output power threshold of the system input end, and then limits and adjusts the current input current and current output power of the input with synchronous rectification buck circuit according to the input current threshold and output power threshold determined after adjustment, that is, limits the input current of the system input end, such as removing the current that exceeds the current threshold.

[0017] By limiting the input current and output power of the input-band synchronous rectification buck circuit at the system input end, it can be ensured that the input current does not trigger the overcurrent protection of the power supply equipment, and the output power will not exceed the current output power of the power supply equipment, thereby improving the operating stability of the system.

[0018] As a preferred example, the real-time acquisition of the current input current and the current output power of the input synchronous rectification buck circuit includes:

[0019] The current input current, current output voltage and current output current of the input synchronous rectification step-down circuit are acquired in real time, and the corresponding current output power is obtained by calculation based on the current output voltage and the current output current.

[0020] The corresponding output power is obtained by obtaining the current voltage and current output current of the input synchronous rectification buck circuit and calculating the product thereof.

[0021] As a preferred example, the limiting and adjusting the current input current and the current output power according to the first input current threshold and the first output power threshold includes:

[0022] limiting a current input current peak value of the input step-down circuit with synchronous rectification according to the first input current threshold value, so that the peak current of the current input current is less than or equal to the first input current threshold value;

[0023] The current output power of the input synchronous rectification buck circuit is limited according to the first output power threshold, so that the normal operating power of the current output power is less than or equal to the first output power threshold.

[0024] The first input current threshold is used to limit the peak current of the input synchronous rectification buck circuit, ensuring that the input current of the synchronous rectification buck circuit does not exceed the overcurrent protection trigger value of the target power supply device. Regarding output power, the first output power threshold is used to limit the current output power of the synchronous rectification buck circuit. Compared to the peak input current, the output power can be directly limited based on the normal operating output power of the input synchronous rectification buck circuit. By limiting the input current and output power, the input current and output power of the synchronous rectification buck circuit are ensured to not trigger the protection function of the power supply module, thereby improving the operational stability and safety of the system.

[0025] As a preferred example, the adjusting the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and outputting the corresponding audio power signal through the adjusted output audio power amplifier, includes:

[0026] acquiring the initial power supply output voltage of the power supply switch circuit and the output operating voltage of the output audio power amplifier in real time, and adjusting the initial power supply output voltage according to the output operating voltage to obtain the second output voltage;

[0027] The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage, and the output audio signal is adjusted and output according to the adjusted output audio power amplifier, and the obtained audio power signal is output to the speaker.

[0028] When adjusting the power of the output audio signal, the system first samples the output voltage of the power supply switch circuit at the power supply end and the output voltage of the output audio amplifier at the output end, and then adjusts the output voltage of the power supply end based on the output voltage of the output end obtained by sampling, so that the output voltage of the power supply end, i.e., the power supply switch circuit, is adjusted to a voltage state suitable for the normal operation of the output end, i.e., the output audio amplifier, thereby ensuring that the output audio amplifier operates in the optimal power supply state, improving the working efficiency and output signal quality of the output audio amplifier, and reducing the power loss of the amplifier.

[0029] After adjusting the output voltage of the power supply switching circuit according to the output voltage of the output audio amplifier, the system will also adjust the voltage gain of the output audio amplifier according to the output voltage of the power supply switching circuit, so as to ensure that the output end, that is, the maximum output voltage of the output audio amplifier, does not produce clipping distortion effects, thereby improving the quality and stability of the output audio signal.

[0030] As a preferred example, the audio power adjustment method further includes:

[0031] Acquire an input audio signal in real time, and perform recognition processing on the input audio signal to obtain the recognition result;

[0032] When the recognition result is that the input audio signal is an abnormal signal or the input audio signal is a continuous signal, the required peak power is obtained and compared with the effective power supply power, and it is determined based on the comparison result whether to adjust the power amplifier voltage gain of the third output voltage according to the second output voltage.

[0033] While monitoring the peak power demand of the power supply switching circuit in real time, the system also monitors the audio signal input to the system in real time to determine whether it is an abnormal audio signal or a continuous audio signal. If the monitoring detects that the input audio signal is one of the above two audio signals, it means that the effective power of the corresponding power supply device will increase accordingly. The increase in the output power of the power supply device will also lead to an increase in the output power of the system output end, that is, the output audio power amplifier. Therefore, it may cause the current power demand of the system to exceed the power that the power supply device can provide. In other words, the peak power demand is greater than the effective power supply power that the power supply device can provide.

[0034] If the system's peak power demand exceeds the effective power supply, the output voltage of the supercapacitor within the system will continue to decrease, and the output voltage of the open-loop power switch circuit will also decrease accordingly. Therefore, to avoid triggering these chain reactions, the system adjusts the voltage gain of the output audio amplifier based on the output voltage of the power switch circuit. This ensures that the adjusted system's peak power demand is less than or equal to the effective power supply provided by the power supply equipment, while also preventing clipping distortion in the output voltage of the output audio amplifier.

[0035] As a preferred example, determining, based on the comparison result, whether to adjust the power amplifier voltage gain of the third output voltage based on the second output voltage includes:

[0036] When the comparison result shows that the required peak power is greater than the effective supply power, obtaining and adjusting the power amplifier voltage gain according to the second output voltage;

[0037] When the comparison result shows that the required peak power is less than or equal to the effective power supply power, it is determined that the effective power supply power has met the current demand and there is no need to adjust the power amplifier voltage gain.

[0038] When the system determines whether to adjust the third output voltage power amplifier voltage gain (i.e., the power amplifier voltage gain at the output end) based on the second output voltage (i.e., the output voltage at the power supply end), the system needs to determine whether the peak power required by the system is greater than the effective power provided by the power supply device, that is, whether the power currently provided by the power supply device meets the system requirements. The system adjusts the output power amplifier gain only if it determines that the power provided by the power supply device no longer meets the power requirements of the system.

[0039] If it is determined that the current peak power required by the system is less than the effective power supply power that the power supply equipment can provide, it means that the current power supply power can meet the current power demand of the system. There is no need to adjust the system's power amplifier voltage gain and it can be maintained as it is.

[0040] Accordingly, an embodiment of the present invention further provides an audio power adjustment device based on Power over Ethernet, wherein the audio power adjustment system includes an input parameter adjustment module, a power supply status adjustment module, and an output power adjustment module; wherein:

[0041] The input parameter adjustment module is used to obtain the device type of the target power supply device, obtain the corresponding type parameters according to the device type, and adjust the current input current and current output power of the input synchronous rectification buck circuit according to the type parameters;

[0042] The power supply state adjustment module is used to collect the required peak power of the power supply switch circuit in real time, and compare the required peak power with the effective power supply power of the target power supply device. When the comparison result shows that the required peak power is greater than the effective power supply power, the supercapacitor is adjusted to the power supply state so that the supercapacitor and the input synchronous rectification buck circuit can simultaneously supply power to the power supply switch circuit;

[0043] The output power adjustment module is used to adjust the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and output a corresponding output audio power signal through the adjusted output audio power amplifier.

[0044] Correspondingly, an embodiment of the present invention also provides an audio power adjustment system based on Ethernet power supply, which includes: a memory, a processor, and an audio power adjustment program stored in the memory and runnable on the processor. When the audio power adjustment program is executed by the processor, the steps of an audio power adjustment method based on Ethernet power supply described in any one of the above items are implemented.

[0045] Correspondingly, an embodiment of the present invention further provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, any of the above-mentioned audio power adjustment methods based on Power over Ethernet is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 : A flow chart of an embodiment of an audio power adjustment method based on Power over Ethernet provided by the present invention;

[0047] Figure 2 : A structural diagram of an embodiment of an audio power adjustment device based on Power over Ethernet provided by the present invention;

[0048] Figure 3 : A structural diagram of an embodiment of an audio power amplification system based on Ethernet power supply provided by the present invention. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] Example 1

[0051] Please refer to Figure 1 , which is a flow chart of an embodiment of the audio power adjustment method based on Power over Ethernet provided by the present invention, including steps 101 to 103, each of which is specifically as follows:

[0052] Step 101: Acquire the device type of the target power supply device, retrieve corresponding type parameters according to the device type, and adjust the current input current and current output power of the input synchronous rectification buck circuit according to the type parameters.

[0053] The audio power adjustment method provided in the embodiment of the present invention first needs to obtain the device type of the power supply device, that is, determine the extended protocol standard corresponding to the power supply device. Since the output power and output voltage of the power supply devices corresponding to different extended protocol standards are different, the system can determine the corresponding type parameters according to the determined device type, that is, determine the various standard parameters that need to be adjusted by the system according to the device type obtained from the target power supply device, including the current input current and current output power of the synchronous rectification buck circuit input in the system. The current input current and current output power of the synchronous rectification buck circuit input are adjusted according to the determined type parameters, ensuring that the input current peak and output power of the synchronous rectification buck circuit do not exceed the protection threshold of the power supply device, avoiding triggering the overcurrent protection function of the power supply device, causing the power supply device to be powered off, affecting the working efficiency of the system, and improving the system's adaptability and compatibility with different types of power supply devices, ensuring the operational stability of the system.

[0054] In this embodiment, the device types corresponding to the target power supply device specifically include IEEE 802.3af, IEEE 802.3at, and IEEE 802.3BT, and IEEE 802.3BT further includes two different types: 60W and 90W.

[0055] Among them, the power supply type is IEEE 802.3af, with a standard output voltage of 50-57V and a maximum output power of 15.4W. In actual applications, excluding line losses and efficiency losses, the long-term sinusoidal power of this type of power supply can only reach 9W. Therefore, in actual situations, the long-term power of this type of equipment under normal operating conditions can be regarded as 9W, that is, the power under normal operating conditions is one-eighth of the rated power. Therefore, in theory, the maximum rated power that this type of power supply can output for a short period of time is 72W. In actual applications, considering the need to take into account program sources with more low frequencies and large dynamic ranges that are relatively continuous, this embodiment sets the maximum power to 3 times the long-term power, that is, 27W, which can meet the most application scenarios of discontinuous signal applications.

[0056] The power supply device of the IEEE 802.3at type has a standard output voltage of 50-57V and a maximum output power of 30W. In actual applications, excluding line losses and efficiency losses, the long-term sinusoidal wave power of this type of power supply device can only reach 20W. Therefore, in actual situations, the long-term power of this type of device under normal working conditions can be regarded as 20W, that is, the power under normal working conditions is one-eighth of the rated power. Therefore, in theory, the maximum rated power that this type of power supply device can output for a short time is 160W. In actual applications, considering the need to take into account program sources with more low frequencies and relatively continuous large dynamics, this embodiment sets the maximum power to 3 times the long-term power, that is, 60W, which can meet most application scenarios of discontinuous signal applications.

[0057] The power supply device of IEEE 802.3BT and 60W power has a standard output voltage of 50-57V and a maximum output power of 60W. In actual applications, excluding line losses and efficiency losses, the long-term sinusoidal wave power of this type of power supply device can only reach 45W. Therefore, in actual situations, the long-term power of this type of device under normal working conditions can be regarded as 45W, that is, the power under normal working conditions is one-eighth of the rated power. Therefore, in theory, the maximum rated power that this type of power supply device can output for a short time is 360W. In actual applications, considering the need to take into account program sources with more low frequencies and relatively continuous large dynamics, this embodiment sets the maximum power to 3 times the long-term power, that is, 135W, which can meet most application scenarios of discontinuous signal applications.

[0058] The power supply device of IEEE 802.3BT and 90W power has a standard output voltage of 50-57V and a maximum output power of 90W. In actual applications, excluding line loss and efficiency loss, the long-term sinusoidal wave power of this type of power supply device can only reach 65W. Therefore, in actual situations, the long-term power of this type of device under normal working conditions can be regarded as 65W, that is, the power under normal working conditions is one-eighth of the rated power. Therefore, in theory, the maximum rated power that this type of power supply device can output in a short time is 520W. In actual applications, considering the need to take into account program sources with more low frequencies and relatively continuous large dynamics, this embodiment sets the maximum power to 3 times the long-term power, that is, 195W, which can meet most application scenarios of discontinuous signal applications.

[0059] Specifically, in this embodiment, adjusting the current input current and the current output power of the step-down circuit with synchronous rectification according to the type parameter specifically includes:

[0060] Adjusting the initial input current threshold and the initial output power threshold of the input step-down circuit with synchronous rectification according to the type parameter to obtain a first input current threshold and a first output power threshold;

[0061] The current input current and the current output power of the input synchronous rectification step-down circuit are acquired in real time, and the current input current and the current output power are limited and adjusted according to the first input current threshold and the first output power threshold respectively to obtain the first input current and the first output power.

[0062] After determining the type parameters of the target power supply equipment, the system adjusts the system input with synchronous rectification buck circuit according to the type parameters, that is, the input current threshold and output power threshold of the system input end, and then limits and adjusts the current input current and current output power of the input with synchronous rectification buck circuit according to the input current threshold and output power threshold determined after adjustment, that is, limits the input current of the system input end, such as removing the current that exceeds the current threshold.

[0063] By limiting the input current and output power of the input-band synchronous rectification buck circuit at the system input end, it can be ensured that the input current does not trigger the overcurrent protection of the power supply equipment, and the output power will not exceed the current output power of the power supply equipment, thereby improving the operating stability of the system.

[0064] Furthermore, the real-time acquisition of the current input current and the current output power of the input synchronous rectifier buck circuit in this embodiment includes:

[0065] The current input current, current output voltage and current output current of the input synchronous rectification step-down circuit are acquired in real time, and the corresponding current output power is obtained by calculation based on the current output voltage and the current output current.

[0066] The corresponding output power is obtained by obtaining the current voltage and current output current of the input synchronous rectification buck circuit and calculating the product thereof.

[0067] Furthermore, in this embodiment, limiting and adjusting the current input current and the current output power according to the first input current threshold and the first output power threshold includes:

[0068] limiting a current input current peak value of the input step-down circuit with synchronous rectification according to the first input current threshold value, so that the peak current of the current input current is less than or equal to the first input current threshold value;

[0069] The current output power of the input synchronous rectification buck circuit is limited according to the first output power threshold, so that the normal operating power of the current output power is less than or equal to the first output power threshold.

[0070] The first input current threshold is used to limit the peak current of the input synchronous rectification buck circuit, ensuring that the input current of the synchronous rectification buck circuit does not exceed the overcurrent protection trigger value of the target power supply device. Regarding output power, the first output power threshold is used to limit the current output power of the synchronous rectification buck circuit. Compared to the peak input current, the output power can be directly limited based on the normal operating output power of the input synchronous rectification buck circuit. By limiting the input current and output power, the input current and output power of the synchronous rectification buck circuit are ensured to not trigger the protection function of the power supply module, thereby improving the operational stability and safety of the system.

[0071] Step 102: The required peak power of the power supply switch circuit is collected in real time, and the required peak power is compared with the effective power supply power of the target power supply device. When the comparison result shows that the required peak power is greater than the effective power supply power, the supercapacitor is adjusted to the power supply state so that the supercapacitor and the input synchronous rectification step-down circuit can simultaneously power the power supply switch circuit.

[0072] After adjusting the input current and output power of the synchronous rectification step-down circuit according to the type parameters of the power supply equipment, the system will also compare the real-time collected peak power demand of the self-powered switching circuit and the effective power supply power of the power supply equipment to determine whether the effective power supply power of the power supply equipment meets the power supply power required by the power supply switching circuit.

[0073] If it is determined based on the comparison results that the current power supply power of the power supply equipment cannot meet the needs of the power supply switch circuit, that is, it cannot meet the needs of the system, the supercapacitor will be adjusted to the power supply state, that is, the input of the supercapacitor is combined with the synchronous rectification and step-down circuit to simultaneously power the power supply switch circuit, thereby increasing the input power of the power supply switch circuit, and then increasing the power supply power of the power supply circuit to the audio amplifier, thereby realizing the amplification of the audio signal power through the POE standard power supply technology.

[0074] Step 103: adjusting the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and outputting a corresponding audio power signal through the adjusted output audio power amplifier.

[0075] After providing high-power power to the power supply circuit, the system will also adjust the voltage gain of the audio amplifier at the output end, i.e., the output audio amplifier, according to the output voltage of the power supply circuit, to avoid clipping distortion of the output audio power signal and improve the stability of the system's output audio signal.

[0076] Specifically, the method of adjusting the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and outputting the corresponding audio power signal through the adjusted output audio power amplifier, includes:

[0077] acquiring the initial power supply output voltage of the power supply switch circuit and the output operating voltage of the output audio power amplifier in real time, and adjusting the initial power supply output voltage according to the output operating voltage to obtain the second output voltage;

[0078] The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage, and the output audio signal is adjusted and output according to the adjusted output audio power amplifier, and the obtained audio power signal is output to the speaker.

[0079] When adjusting the power of the output audio signal, the system first samples the output voltage of the power supply switch circuit at the power supply end and the output voltage of the output audio amplifier at the output end, and then adjusts the output voltage of the power supply end based on the output voltage of the output end obtained by sampling, so that the output voltage of the power supply end, i.e., the power supply switch circuit, is adjusted to a voltage state suitable for the normal operation of the output end, i.e., the output audio amplifier, thereby ensuring that the output audio amplifier operates in the optimal power supply state, improving the working efficiency and output signal quality of the output audio amplifier, and reducing the power loss of the amplifier.

[0080] After adjusting the output voltage of the power supply switching circuit according to the output voltage of the output audio amplifier, the system will also adjust the voltage gain of the output audio amplifier according to the output voltage of the power supply switching circuit, so as to ensure that the output end, that is, the maximum output voltage of the output audio amplifier, does not produce clipping distortion effects, thereby improving the quality and stability of the output audio signal.

[0081] In addition, the audio power adjustment method provided in this embodiment further includes:

[0082] Acquire an input audio signal in real time, and perform recognition processing on the input audio signal to obtain the recognition result;

[0083] When the recognition result is that the input audio signal is an abnormal signal or the input audio signal is a continuous signal, the required peak power is obtained and compared with the effective power supply power, and it is determined based on the comparison result whether to adjust the power amplifier voltage gain of the third output voltage according to the second output voltage.

[0084] While monitoring the peak power demand of the power supply switching circuit in real time, the system also monitors the audio signal input to the system in real time to determine whether it is an abnormal audio signal or a continuous audio signal. If the monitoring detects that the input audio signal is one of the above two audio signals, it means that the effective power of the corresponding power supply device will increase accordingly. The increase in the output power of the power supply device will also lead to an increase in the output power of the system output end, that is, the output audio power amplifier. Therefore, it may cause the current power demand of the system to exceed the power that the power supply device can provide. In other words, the peak power demand is greater than the effective power supply power that the power supply device can provide.

[0085] If the system's peak power demand exceeds the effective power supply, the output voltage of the supercapacitor within the system will continue to decrease, and the output voltage of the open-loop power switch circuit will also decrease accordingly. Therefore, to avoid triggering these chain reactions, the system adjusts the voltage gain of the output audio amplifier based on the output voltage of the power switch circuit. This ensures that the adjusted system's peak power demand is less than or equal to the effective power supply provided by the power supply equipment, while also preventing clipping distortion in the output voltage of the output audio amplifier.

[0086] Specifically, in this embodiment, determining whether to adjust the power amplifier voltage gain of the third output voltage according to the second output voltage according to the comparison result includes:

[0087] When the comparison result shows that the required peak power is greater than the effective supply power, obtaining and adjusting the power amplifier voltage gain according to the second output voltage;

[0088] When the comparison result shows that the required peak power is less than or equal to the effective power supply power, it is determined that the effective power supply power has met the current demand and there is no need to adjust the power amplifier voltage gain.

[0089] When the system determines whether to adjust the third output voltage power amplifier voltage gain (i.e., the power amplifier voltage gain at the output end) based on the second output voltage (i.e., the output voltage at the power supply end), the system needs to determine whether the peak power required by the system is greater than the effective power provided by the power supply device, that is, whether the power currently provided by the power supply device meets the system requirements. The system adjusts the output power amplifier gain only if it determines that the power provided by the power supply device no longer meets the power requirements of the system.

[0090] If it is determined that the current peak power required by the system is less than the effective power supply power that the power supply equipment can provide, it means that the current power supply power can meet the current power demand of the system. There is no need to adjust the system's power amplifier voltage gain and it can be maintained as it is.

[0091] Example 2

[0092] In order to enrich the audio power adjustment method provided by the present invention, this embodiment also provides an audio power amplification system based on Ethernet power supply, see Figure 3 , Figure 3 This is a structural diagram of an embodiment of an audio power amplification system based on Ethernet power provided by the present invention. Figure 3 As shown, the audio power amplification system includes an input end - a synchronous rectification Buck circuit, i.e., the input step-down circuit with synchronous rectification described in Example 1, a supercapacitor module, i.e., the supercapacitor described in Example 1, a power supply end - a switching power supply, i.e., the power supply switching circuit described in Example 1, an MCU main control module, an output end - an audio power amplifier, i.e., the output audio power amplifier described in Example 1, and a fixed-resistance speaker. Figure 3 It also includes PSE, the target power supply equipment described in the first embodiment, as well as network communication, audio decoding and external analog input.

[0093] Among them, the POE power supply used to receive external power supply is collectively referred to as PSE; the synchronous rectification Buck circuit is preferably set to a constant voltage and constant current mode and is connected to the input end, that is, the PSE described in this embodiment, for charging the supercapacitor, and can also limit the input power of the input end to not exceed the maximum power supplied by the PSE; the power supply end-the switching power supply is connected to the supercapacitor, for obtaining electrical energy from the supercapacitor, and the power supply end includes a half-bridge or push-pull power supply, and the half-bridge is connected to the supercapacitor, for converting the electrical energy of the supercapacitor into DC power supply; the output end-the audio amplifier is connected to the power supply end to power the audio amplifier to drive the speaker to produce sound; the input audio signal is input from the network or an external analog interface.

[0094] Figure 3 The MCU main control module, i.e., the microprocessor of this embodiment, is respectively connected to the synchronous rectification BUCK circuit, the power supply end, and the output end, and is used to control the operation of the synchronous rectification BUCK circuit, the power supply end, and the output end.

[0095] When the peak power currently required by the power supply end-switching power supply, i.e., the required peak power described in Example 1, does not exceed the effective power supply power of the PSE, the input end-synchronous rectification BUCK circuit will charge or float charge the supercapacitor, and will also provide DC power supply to the power supply end; when the peak power currently required by the power supply end-switching power supply exceeds the effective power supply power of the PSE, the input end-synchronous rectification BUCK circuit and the supercapacitor will simultaneously supply power to the power supply end.

[0096] Furthermore, since the output end of the synchronous rectification BUCK circuit is connected in parallel with the supercapacitor, various power supply states in the system are seamlessly connected without any adverse effects on the power supply end.

[0097] like Figure 3 As shown, the system communicates with the microprocessor through the network, i.e. Figure 3 The MCU main control module is shown as follows: four PSE types are set, and the microprocessor sets the corresponding parameters for the input, power supply, and output terminals according to the different PSE types. The specific contents of the parameter settings are as follows:

[0098] First, the microprocessor of this embodiment will set the input current threshold and output power threshold of the corresponding synchronous rectification buck circuit according to the set PSE type, and will also collect the input current, output voltage and output current of the synchronous rectification buck circuit.

[0099] Because the PSE's output voltage is constant, its protection threshold depends on the output current, which is the input current of the synchronous rectifier buck circuit. Therefore, the microprocessor can limit the buck module's input peak current based on the set input current threshold to ensure that its peak current does not exceed the current PSE protection threshold.

[0100] The microprocessor can also calculate the actual output power based on the collected output voltage and output current, and limit the actual output power according to the set buck circuit output power to ensure that its long-term operating power does not exceed the current PSE output power.

[0101] Secondly, the microprocessor will also set the output voltage threshold of the control power supply end-switching power supply according to the set PSE type, and at the same time collect the output voltage of the power supply end-switching power supply, and adjust the output voltage of the power supply end-switching power supply to the appropriate working voltage of the output end-audio power amplifier. That is, the output voltage of the power supply end-switching power supply will be adjusted accordingly according to the working voltage of the output end-audio power amplifier, so that the output end-audio power amplifier is in the best power supply state after adjustment, thereby reducing the power consumption of the amplifier.

[0102] At the same time, the microprocessor will also adjust the voltage gain of the output end - audio power amplifier in real time according to the output voltage of the power supply end - switching power supply, so that the maximum output voltage of the output end - audio power amplifier does not produce clipping distortion effect.

[0103] In addition, when the system's input audio signal is abnormal or a continuous signal is input, the effective value of the PSE's power input will increase, which will in turn increase the effective value of the output power of the output end - the audio amplifier.

[0104] When the current power supply required by the system further increases to be greater than the effective power supply of the PSE, the output voltage of the supercapacitor will continue to decrease, causing the output voltage of the power supply end in the open-loop state - the switching power supply - to also decrease.

[0105] At this time, the microprocessor will proportionally reduce the voltage gain of the output end - audio power amplifier according to the output voltage of the power supply end - switching power supply, so that the maximum output voltage of the output end - audio power amplifier is not clipped and the currently required power supply power is less than or equal to the effective power supply power of the PSE.

[0106] use Figure 3 The system shown is used to power an audio amplifier. Under the restricted power supply conditions of IEEE 802.3af, the system can use a limited maximum power of 12.95W to charge the supercapacitor. The supercapacitor can then release several times the limited maximum power for short periods of time to power the audio amplifier, enabling it to output high-peak music power to drive the speakers. Theoretically, this can achieve a listening experience very similar to that of an audio amplifier rated at 27W to 72W driving speakers of the same model.

[0107] Under the limited power supply conditions of IEEE 802.3at, the system can use the actual 25.5W limited maximum power to charge the supercapacitor. The supercapacitor can then release several times the limited maximum power for a short period of time to power the audio amplifier, allowing it to output high-peak music power to drive the speakers. Theoretically, this can achieve a listening experience very close to that of an audio amplifier rated at 60W to 160W driving speakers of the same model.

[0108] Under IEEE 802.3BT and a limited 60W power supply, the system can use an actual 51W limited maximum power to charge the supercapacitor. The supercapacitor can then release several times the limited maximum power for a short period of time to power the audio amplifier, enabling it to output high-peak music power to drive the speakers. Theoretically, this can achieve a listening experience very close to that of an audio amplifier with a rated power of 135W to 360W driving speakers of the same model.

[0109] Under the IEEE 802.3BT, 90W limited power supply conditions, the system can use the actual 71.3W limited maximum power to charge the supercapacitor, and the supercapacitor can release a short-term power several times the limited maximum power to power the audio amplifier, allowing it to output high-peak music power to drive the speakers. In theory, a listening effect very close to that of an audio amplifier with a rated power of 195W to 520W driving speakers of the same model can be achieved.

[0110] In order to better illustrate the working principle and process flow of the audio power adjustment method, device and system based on Ethernet power supply of the present invention, you can refer to but not be limited to the relevant records above.

[0111] Accordingly, see Figure 2 , Figure 2 This is a structural diagram of an embodiment of the audio power adjustment device based on Ethernet power provided by the present invention. Figure 2 As shown, the audio power adjustment system includes an input parameter adjustment module 201, a power supply status adjustment module 202 and an output power adjustment module 203; wherein:

[0112] The input parameter adjustment module 201 is used to obtain the device type of the target power supply device, obtain corresponding type parameters according to the device type, and adjust the current input current and current output power of the input synchronous rectification buck circuit according to the type parameters.

[0113] Furthermore, the input parameter adjustment module 201 adjusts the current input current and the current output power of the step-down circuit with synchronous rectification according to the type parameter, specifically including:

[0114] Adjusting the initial input current threshold and the initial output power threshold of the input step-down circuit with synchronous rectification according to the type parameter to obtain a first input current threshold and a first output power threshold;

[0115] The current input current and the current output power of the input synchronous rectification step-down circuit are acquired in real time, and the current input current and the current output power are limited and adjusted according to the first input current threshold and the first output power threshold respectively to obtain the first input current and the first output power.

[0116] Furthermore, the input parameter adjustment module 201 acquires the current input current and the current output power of the input synchronous rectifier buck circuit in real time, including:

[0117] The current input current, current output voltage and current output current of the input synchronous rectification step-down circuit are acquired in real time, and the corresponding current output power is obtained by calculation based on the current output voltage and the current output current.

[0118] Furthermore, the input parameter adjustment module 201 limits and adjusts the current input current and the current output power according to the first input current threshold and the first output power threshold, including:

[0119] limiting a current input current peak value of the input step-down circuit with synchronous rectification according to the first input current threshold value, so that the peak current of the current input current is less than or equal to the first input current threshold value;

[0120] The current output power of the input synchronous rectification buck circuit is limited according to the first output power threshold, so that the normal operating power of the current output power is less than or equal to the first output power threshold.

[0121] The power supply status adjustment module 202 is used to collect the required peak power of the power supply switch circuit in real time, and compare the required peak power with the effective power supply power of the target power supply device. When the comparison result shows that the required peak power is greater than the effective power supply power, the supercapacitor is adjusted to the power supply state so that the supercapacitor and the input synchronous rectification step-down circuit can simultaneously power the power supply switch circuit.

[0122] The output power adjustment module 203 is used to adjust the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and output a corresponding output audio power signal through the adjusted output audio power amplifier.

[0123] Furthermore, the output power adjustment module 203 adjusts the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and outputs a corresponding audio power signal through the adjusted output audio power amplifier, including:

[0124] acquiring the initial power supply output voltage of the power supply switch circuit and the output operating voltage of the output audio power amplifier in real time, and adjusting the initial power supply output voltage according to the output operating voltage to obtain the second output voltage;

[0125] The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage, and the output audio signal is adjusted and output according to the adjusted output audio power amplifier, and the obtained audio power signal is output to the speaker.

[0126] Furthermore, the output power adjustment module 203 further includes:

[0127] Acquire an input audio signal in real time, and perform recognition processing on the input audio signal to obtain the recognition result;

[0128] When the recognition result is that the input audio signal is an abnormal signal or the input audio signal is a continuous signal, the required peak power is obtained and compared with the effective power supply power, and it is determined based on the comparison result whether to adjust the power amplifier voltage gain of the third output voltage according to the second output voltage.

[0129] Furthermore, the output power adjustment module 203 determines whether to adjust the power amplifier voltage gain of the third output voltage according to the second output voltage based on the comparison result, including:

[0130] When the comparison result shows that the required peak power is greater than the effective supply power, obtaining and adjusting the power amplifier voltage gain according to the second output voltage;

[0131] When the comparison result shows that the required peak power is less than or equal to the effective power supply power, it is determined that the effective power supply power has met the current demand and there is no need to adjust the power amplifier voltage gain.

[0132] Correspondingly, an embodiment of the present invention also provides an audio power adjustment system based on Ethernet power supply, which includes: a memory, a processor, and an audio power adjustment program stored in the memory and runnable on the processor. When the audio power adjustment program is executed by the processor, the steps of an audio power adjustment method based on Ethernet power supply described in any one of the above items are implemented.

[0133] Correspondingly, an embodiment of the present invention further provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, any of the above-mentioned audio power adjustment methods based on Power over Ethernet is implemented.

[0134] In summary, the embodiments of the present invention provide an audio power adjustment method, device, and system based on Ethernet power supply. The input current and output power of the input synchronous rectification buck circuit are adjusted by obtaining the type parameters of the self-powered device, the required peak power of the power supply switch circuit is collected, and it is compared with the effective power supply power of the power supply device. When it is determined that the required power is greater than the power supply power, the supercapacitor is adjusted to the power supply state so that it and the synchronous rectification buck circuit can simultaneously power the power supply circuit; the amplifier voltage gain of the output audio amplifier is adjusted according to the second output voltage of the power supply switch circuit, and the corresponding audio power signal is output through the adjusted audio amplifier. The input current and output power of the input synchronous rectification buck circuit are adjusted according to the type parameters of the power supply device, thereby improving the adaptability and compatibility of the system to different types of power supply devices; the power supply switch circuit is supplied with high power by the supercapacitor, thereby realizing power amplification through POE standard technology.

[0135] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A method for adjusting audio power based on Power over Ethernet, characterized in that: The following steps are involved: Obtain the device type of the target power supply device, retrieve the corresponding type parameters according to the device type, and adjust the current input current and current output power of the input with synchronous rectification buck circuit according to the type parameters; specifically including: adjusting the initial input current threshold and the initial output power threshold of the input with synchronous rectification buck circuit according to the type parameters to obtain a first input current threshold and a first output power threshold; acquiring the current input current and the current output power of the input with synchronous rectification buck circuit in real time, and limiting and adjusting the current input current and the current output power according to the first input current threshold and the first output power threshold respectively to obtain the first input current and the first output power; collecting the required peak power of the power supply switch circuit in real time, and comparing the required peak power with the effective power supply power of the target power supply device, and when the comparison result shows that the required peak power is greater than the effective power supply power, adjusting the supercapacitor to a power supply state so that the supercapacitor and the input synchronous rectification buck circuit simultaneously power the power supply switch circuit; The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage of the power supply switch circuit, and the corresponding audio power signal is outputted through the adjusted output audio power amplifier.

2. The method for adjusting audio power based on Power over Ethernet according to claim 1, wherein: The real-time acquisition of the current input current and the current output power of the input synchronous rectification buck circuit includes: The current input current, current output voltage and current output current of the input synchronous rectification step-down circuit are acquired in real time, and the corresponding current output power is obtained by calculation based on the current output voltage and the current output current.

3. The method for adjusting audio power based on Power over Ethernet according to claim 1, wherein: The limiting and adjusting the current input current and the current output power according to the first input current threshold and the first output power threshold includes: limiting a current input current peak value of the input step-down circuit with synchronous rectification according to the first input current threshold value, so that the peak current of the current input current is less than or equal to the first input current threshold value; The current output power of the input synchronous rectification buck circuit is limited according to the first output power threshold, so that the normal operating power of the current output power is less than or equal to the first output power threshold.

4. The method for adjusting audio power based on Power over Ethernet according to claim 1, wherein: The adjusting the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and outputting a corresponding audio power signal through the adjusted output audio power amplifier, comprises: Acquire the initial power supply output voltage of the power supply switch circuit and the output operating voltage of the output audio power amplifier in real time, and adjust the initial power supply output voltage according to the output operating voltage to obtain the second output voltage; The power amplifier voltage gain of the output audio power amplifier is adjusted according to the second output voltage, and the output audio signal is adjusted and output according to the adjusted output audio power amplifier, and the obtained audio power signal is output to the speaker.

5. The method for adjusting audio power based on Power over Ethernet according to claim 1, wherein: Also includes: Acquire an input audio signal in real time, and perform recognition processing on the input audio signal to obtain a recognition result; When the recognition result is that the input audio signal is an abnormal signal or the input audio signal is a continuous signal, the required peak power is obtained and compared with the effective power supply power, and it is determined based on the comparison result whether to adjust the power amplifier voltage gain of the third output voltage according to the second output voltage.

6. The method for adjusting audio power based on Power over Ethernet according to claim 5, wherein: The determining, based on the comparison result, whether to adjust the power amplifier voltage gain of the third output voltage based on the second output voltage includes: When the comparison result shows that the required peak power is greater than the effective supply power, obtaining and adjusting the power amplifier voltage gain according to the second output voltage; When the comparison result shows that the required peak power is less than or equal to the effective power supply power, it is determined that the effective power supply power has met the current demand and there is no need to adjust the power amplifier voltage gain.

7. An audio power adjustment device based on Power over Ethernet, characterized in that: It includes an input parameter adjustment module, a power supply status adjustment module and an output power adjustment module; wherein: The input parameter adjustment module is used to obtain the device type of the target power supply device, obtain the corresponding type parameters according to the device type, and adjust the current input current and current output power of the input synchronous rectification buck circuit according to the type parameters; specifically including: adjusting the initial input current threshold and the initial output power threshold of the input synchronous rectification buck circuit according to the type parameters to obtain the first input current threshold and the first output power threshold; acquiring the current input current and the current output power of the input synchronous rectification buck circuit in real time, and limiting and adjusting the current input current and the current output power according to the first input current threshold and the first output power threshold respectively to obtain the first input current and the first output power; The power supply state adjustment module is used to collect the required peak power of the power supply switch circuit in real time, and compare the required peak power with the effective power supply power of the target power supply device. When the comparison result shows that the required peak power is greater than the effective power supply power, the supercapacitor is adjusted to the power supply state so that the supercapacitor and the input synchronous rectification buck circuit can simultaneously supply power to the power supply switch circuit; The output power adjustment module is used to adjust the power amplifier voltage gain of the output audio power amplifier according to the second output voltage of the power supply switch circuit, and output a corresponding output audio power signal through the adjusted output audio power amplifier.

8. An audio power adjustment system based on Power over Ethernet, characterized in that: The audio power adjustment system includes: a memory, a processor, and an audio power adjustment program stored in the memory and executable on the processor. When the audio power adjustment program is executed by the processor, the steps of an audio power adjustment method based on Power over Ethernet as described in any one of claims 1 to 6 are implemented.

9. A storage medium, characterized in that: The storage medium stores a computer program, wherein when the computer program is executed by a processor, the method for adjusting audio power based on Power over Ethernet according to any one of claims 1 to 6 is implemented.

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