Power adaptive matching method and control device of POE system, POE system and medium

Abstract

The application discloses a power adaptive matching method, a control device, a POE system and a computer readable storage medium. The power adaptive matching method comprises the following steps: collecting a first output voltage of an adapter in an idle state; controlling a power supply device to supply power to a powered device with different power supply powers and monitoring a second output voltage of the adapter corresponding to the power supply power in real time; obtaining voltage drop characteristic information of the adapter according to the first output voltage and the second output voltage; obtaining a rated power of the adapter according to the voltage drop characteristic information of the adapter and a current power supply power; and adjusting an output power of the power supply device according to the rated power of the adapter. In the power adaptive matching method, the compatibility of the POE system to adapters of different specifications is improved without adding additional identification hardware, and the risk of overload and instability of the adapter is reduced.

Description

Technical Field

[0001] This invention relates to the field of Power over Ethernet (PoE) technology, and in particular to a power adaptive matching method, control device, PoE system, and computer-readable storage medium for a PoE system. Background Technology

[0002] In related technologies, PoE (Power over Ethernet) systems are power supply systems that simultaneously transmit data and electrical energy over a network cable. Their infrastructure typically includes an adapter, a power supply equipment (PSE), and at least one powered device (PD). The PSE obtains input power from the adapter and supplies power to the PD via the Ethernet line. PoE systems are widely used in switches, wireless access points (APs), IPC cameras, and other similar applications. However, current PoE systems cannot currently identify the actual power supply capacity of the connected adapter, which can easily lead to problems such as adapter overload protection or operational instability. Summary of the Invention

[0003] The present invention provides a power adaptive matching method, control device, POE system and computer-readable storage medium for a POE system to solve at least one of the above-mentioned technical problems.

[0004] This invention provides a power adaptive matching method for a PoE system, which includes an adapter, a power supply device, and at least one power receiving device. The adapter is electrically connected to the at least one power receiving device through the power supply device. The power adaptive matching method includes: Collect the first output voltage of the adapter under no-load conditions; The power supply device is controlled to supply power to the powered device at multiple different power levels, and the second output voltage of the adapter corresponding to the power level is monitored in real time. The voltage drop characteristic information of the adapter is obtained based on the first output voltage and the second output voltage; The rated power of the adapter is obtained based on the voltage drop characteristics of the adapter and the current power supply. The output power of the power supply device is adjusted according to the rated power of the adapter.

[0005] In the aforementioned power adaptive matching method, the power supply equipment is controlled to supply power to the powered device at multiple different power levels and the second output voltage of the adapter is monitored in real time. The voltage drop characteristic information of the adapter is obtained based on the first and second output voltages. The rated power of the adapter can be automatically identified based on the voltage drop characteristic information of the adapter, and the output power of the power supply equipment is dynamically adjusted according to the identification result. Thus, without adding additional identification hardware, the compatibility of the PoE system with adapters of different specifications is improved, and the risk of adapter overload and instability is reduced.

[0006] In some implementations, the voltage sag characteristic information of the adapter includes voltage sag depth and voltage sag recovery time. Obtaining the voltage sag characteristic information of the adapter based on the first output voltage and the second output voltage includes: The voltage drop rate and the voltage drop depth are obtained based on the first output voltage and the second output voltage; When the second output voltage is less than a preset voltage threshold or the voltage drop rate is greater than a preset rate threshold, the power supply device is controlled to stop supplying power to the power receiving device and the voltage drop recovery time is determined.

[0007] In some embodiments, controlling the power supply device to supply power to the power receiving device at different power levels includes: The power supply equipment is controlled to increase the power supply to the power receiving equipment in a step-by-step manner, and the power supply is maintained for a preset duration at each power supply level.

[0008] In some implementations, adjusting the output power of the power supply device according to the rated power of the adapter includes: The upper limit of the output power of the power supply equipment is determined based on the rated power of the adapter and the preset safety factor; The output power of the power supply equipment is adjusted according to the upper limit of the output power.

[0009] In some embodiments, the PoE system includes a plurality of the powered devices, and adjusting the output power of the powered devices according to the rated power of the adapter includes: The power supply equipment is controlled to dynamically allocate power to the multiple power receiving devices according to the upper limit of the output power.

[0010] In some embodiments, the power adaptive matching method further includes: During the operation of the PoE system, the output electrical parameters of the power supply equipment are monitored in real time, and the upper limit of the output power of the power supply equipment is dynamically adjusted according to the output electrical parameters of the power supply equipment.

[0011] In some implementations, obtaining the rated power of the adapter based on the voltage drop characteristic information and the current power supply includes: The rated power of the adapter is obtained based on the preset mapping relationship, the voltage drop characteristic information, and the current power supply.

[0012] An embodiment of the present invention provides a control device including a processor and a memory; The memory stores a computer program, which, when executed by the processor, implements the steps of the power adaptive matching method described in any of the above embodiments.

[0013] An embodiment of the present invention provides a POE system including the control device described in the above embodiment.

[0014] The present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the power adaptive matching method described in any of the above embodiments.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein: Figures 1 to 2 This is a flowchart illustrating the power adaptive matching method for an adapter according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the POE system according to an embodiment of the present invention.

[0017] Explanation of key figure labels: The PoE system 100 includes a power supply device 10, a control device 20, a power receiving device 30, an adapter 40, a memory 21, and a processor 22. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention.

[0019] Please see Figure 1 and Figure 3The present invention provides a power adaptive matching method for a POE system 100, which is used in the POE system 100. The POE system 100 includes an adapter 40, a power supply device 10 and at least one power receiving device 30. The adapter 40 is electrically connected to the at least one power receiving device 30 through the power supply device 10. Power adaptive matching methods include: Step S01: Collect the first output voltage of adapter 40 under no-load conditions; Step S02: Control the power supply device 10 to supply power to the power receiving device 30 with multiple different power supplies and monitor the second output voltage of the adapter 40 under the power supply power in real time; Step S03: Obtain voltage drop characteristic information of adapter 40 based on the first output voltage and the second output voltage; Step S04: Obtain the rated power of adapter 40 based on the voltage drop characteristic information of adapter 40 and the current power supply. Step S05: Adjust the output power of the power supply device 10 according to the rated power of the adapter 40.

[0020] In the above-mentioned power adaptive matching method, the power supply device 10 supplies power to the powered device 30 with multiple different power supplies and monitors the second output voltage of the adapter 40 in real time. The voltage drop characteristic information of the adapter 40 is obtained based on the first output voltage and the second output voltage. The rated power of the adapter 40 can be automatically identified based on the voltage drop characteristic information of the adapter 40, and the output power of the power supply device 10 is dynamically adjusted according to the identification result. Thus, without adding additional identification hardware, the compatibility of the PoE system 100 with adapters 40 of different specifications is improved, and the risk of overload and instability of the adapter 40 is reduced.

[0021] Specifically, a PoE (Power over Ethernet) system is a power supply system that transmits data signals and electrical energy simultaneously via a network cable. A PoE system 100 includes an adapter 40, a power sourcing equipment 10 (PSE), and at least one powered device 30 (PD). The adapter 40 converts external AC power into DC power required by the power sourcing equipment 10; the power sourcing equipment 10 receives the electrical energy output from the adapter 40 and outputs power and data signals to the powered device 30 via the Ethernet line; the powered device 30 is a terminal device that obtains power via PoE, such as a wireless access point (AP), IPC camera, VoIP phone, or access control device.

[0022] This invention proposes a power adaptive matching method for a PoE system 100. By controlling the power supply power of the power supply device 10 to the power receiving device 30, the adapter 40 is subjected to different load states. The second output voltage of the adapter 40 under different load states is monitored in real time, and the voltage drop characteristic information of the adapter 40 is obtained based on the first and second output voltages. Since adapters 40 with different power specifications have different voltage drop response characteristics under different load states, the rated power of the adapter 40 can be identified based on the voltage drop characteristic information.

[0023] Specifically, in step S01, the first output voltage of adapter 40 in the no-load state refers to the output voltage of adapter 40 when there is no load.

[0024] In step S02, the power supply device 10 can control the power supply to the powered device 30 through its internal power management unit. Under different power supply conditions, the adapter 40 enters different load states. The second output voltage of the adapter 40 under different load states is collected in real time. In step S03, the voltage drop characteristic information of the adapter 40 is obtained based on the first and second output voltages. It should be understood that when the power supply device 10 supplies power to the powered device 30, the adapter 40 is under load, and the output voltage of the adapter 40 will drop to a certain extent. The voltage drop characteristic information is used to characterize the relative relationship between the first and second output voltages.

[0025] In step S04, the rated power of adapter 40 is determined based on voltage drop characteristic information and the current power supply. The rated power of adapter 40 reflects its power supply capability. In step S05, after identifying the rated power of adapter 40, the output power of power supply device 10 to power receiving device 30 can be dynamically adjusted based on the power supply capability of adapter 40.

[0026] Furthermore, it should be noted that the power adaptive matching method of the POE system 100 of the present invention does not depend on any communication protocol (such as LLDP, CDP) between the PD (Powered Device 30) and the PSE (Power Supply Device 10), and therefore can be compatible with most standard POE systems 100, and has strong universality.

[0027] In some implementations, please refer to Figure 2 and Figure 3 The voltage sag characteristic information of adapter 40 includes voltage sag depth and voltage sag recovery time. Step S03 includes: Step S031: Obtain the voltage drop rate and voltage drop depth based on the first output voltage and the second output voltage; Step S032: When the second output voltage is less than the preset voltage threshold or the voltage drop rate is greater than the preset rate threshold, control the power supply device 10 to stop supplying power to the power receiving device 30 and determine the voltage drop recovery time.

[0028] The above implementation method can obtain voltage drop characteristic information to accurately reflect the power supply capacity of adapter 40, which is beneficial for determining the rated power of adapter 40.

[0029] Specifically, voltage sag depth refers to the magnitude by which the output voltage of adapter 40 drops from the first output voltage to the second output voltage, and voltage sag rate refers to the rate at which the first output voltage drops to the second output voltage per unit time. Voltage sag recovery time refers to the time required for the output voltage of adapter 40 to recover from the second output voltage to the first output voltage.

[0030] When the second output voltage of adapter 40 is less than a preset voltage threshold, or when the voltage drop rate is greater than a preset rate threshold, the current power supply is considered to be close to the critical output capacity of adapter 40. The power supply device 10 is controlled to stop supplying power to the receiving device 30, and the time required for the output voltage of adapter 40 to recover from the second output voltage to the first output voltage is further monitored to obtain the voltage drop recovery time. It can be understood that when the power supply device 10 supplies power to the receiving device 30, adapter 40 is under load; the greater the power supply power from the power supply device 10 to the receiving device 30, the higher the load pressure on adapter 40. When the power supply device 10 stops supplying power to the receiving device 30, adapter 40 is under no-load.

[0031] Optionally, the preset voltage threshold and preset rate threshold can be determined based on factors such as the type of adapter 40, safety requirements, and actual operating environment. This invention does not impose specific limitations on these factors.

[0032] In some implementations, please refer to Figure 1 and Figure 3 Controlling the power supply equipment 10 to supply power to the power receiving equipment 30 at multiple different power levels includes: The control power supply equipment 10 increases the power supply to the power receiving equipment 30 in a step-by-step manner, and maintains the power supply for a preset duration at each power level.

[0033] The above implementation method helps to provide an accurate data basis for determining the rated power of the adapter 40, thereby improving the accuracy of the rated power.

[0034] Specifically, the control power supply device 10 starts supplying power to the powered device 30 from a lower power level, and then gradually increases the power supply to the powered device 30 in a stepped manner, so that the adapter 40 experiences different operating states from light load to heavy load. Maintaining a preset duration at each power supply level can, to some extent, ensure that the second output voltage of the adapter 40 reaches a stable state, thereby accurately acquiring the second output voltage at the current power supply level.

[0035] Optionally, the step size of the power supply increment can be uniform or non-uniform.

[0036] In one implementation, the preset duration is 50 milliseconds, and the power supply to the powered device 30 is increased stepwise according to the following step-by-step increments: Level 1, power supply of 5 watts; Level 2, power supply of 10 watts; Level 3, power supply of 20 watts; Level 4, power supply of 30 watts; Level 5, power supply of 40 watts; Level 6, power supply of 50 watts; Level 7, power supply of 60 watts.

[0037] In some implementations, please refer to Figure 1 and Figure 3 Adjusting the output power of the power supply device 10 according to the rated power of the adapter 40 includes: The upper limit of the output power of the power supply device 10 is determined based on the rated power of the adapter 40 and the preset safety factor; Adjust the output power of power supply equipment 10 according to the upper limit of output power.

[0038] The above implementation can reduce the risk of unstable operation of adapter 40 due to instantaneous load fluctuations, voltage fluctuations or environmental changes.

[0039] Specifically, the rated power of adapter 40 reflects the maximum power supply capacity that adapter 40 can output. To reduce the possibility of adapter 40 operating under full load or overload for extended periods, after obtaining the rated power of adapter 40, the upper limit of the output power of power supply device 10 can be further determined by combining it with a preset safety factor. The preset safety factor is used to reserve a certain safety margin for adapter 40 to reduce the risk of unstable operation of adapter 40 due to instantaneous load fluctuations, voltage fluctuations, or environmental changes. For example, when the rated power of adapter 40 is identified as 60W and the preset safety factor is 0.85, the upper limit of the output power of power supply device 10 can be set to 60W * 0.85 = 51W. Power supply device 10 can control the power supply to the powered device 30 based on this upper limit of output power, thereby ensuring to a certain extent that the actual output power of power supply device 10 does not exceed the safe power supply capacity of adapter 40.

[0040] The preset safety factor is greater than 0 and less than 1. Optionally, the preset safety factor is 0.8 to 0.9. The preset safety factor can be determined based on factors such as adapter 40 specifications, system operating environment, load fluctuations, and power supply stability requirements, and this invention does not impose specific limitations on it.

[0041] In some implementations, please refer to Figure 1 and Figure 3 The PoE system 100 includes multiple powered devices 30, and the output power of the powered devices 10 is adjusted according to the rated power of the adapter 40, including: The control power supply equipment 10 dynamically distributes power to multiple powered devices 30 according to the upper limit of the output power.

[0042] The above implementation method can improve the utilization efficiency of the power supply resources of adapter 40.

[0043] Specifically, when the PoE system 100 includes multiple powered devices 30, the power requirements of different powered devices 30 may differ. For example, devices such as IPC cameras, wireless APs, and VoIP phones have different power consumption, and their real-time power requirements may also change under different operating conditions. Therefore, after determining the upper limit of the output power of the power supply device 10, the power supply device 10 can dynamically allocate the output power according to the power requirements of the multiple powered devices 30.

[0044] For example, when the total power demand of multiple powered devices 30 is less than the upper limit of output power, the power supply device 10 can supply power to each powered device 30 normally; when the total power demand of multiple powered devices 30 is greater than the upper limit of output power, the power supply device 10 can dynamically allocate power to the multiple powered devices 30 according to a preset priority strategy. For example, priority can be given to ensuring the power supply needs of critical devices such as IPC cameras, while reducing the power supply to some low-priority devices or restricting their access to the power supply device 10.

[0045] In some implementations, please refer to Figure 1 and Figure 3 The power adaptive matching method also includes: During the operation of the POE system 100, the output electrical parameters of the power supply equipment 10 are monitored in real time, and the upper limit of the output power of the power supply equipment 10 is dynamically adjusted according to the output electrical parameters of the power supply equipment 10.

[0046] The above-described embodiments can adaptively adjust the power supply capacity of the power supply device 10 according to the operating status of the POE system 100, thereby improving the stability of the adapter 40.

[0047] Specifically, during the operation of the PoE system 100, the operating status of the powered device 30 or the operating status of the power supply device 10 may change, causing fluctuations in the output electrical parameters of the power supply device 10. For example, the instantaneous power increases when the powered device 30 starts a high-power module, or the total load changes suddenly when multiple powered devices 30 switch operating states simultaneously. Therefore, by monitoring the output electrical parameters of the power supply device 10 (such as output voltage and output power) in real time, the current actual load and power supply pressure of the adapter 40 can be reflected.

[0048] When abnormal changes in the output electrical parameters of the power supply device 10 are detected, such as when the output power of the power supply device 10 exceeds the first safety threshold or the output voltage of the power supply device 10 is lower than the second safety threshold, it can be determined that the current load of the POE system 100 is becoming strained. At this time, the abnormal event can be recorded. When abnormal changes in the output electrical parameters of the power supply device 10 are detected for a preset number of consecutive times, the upper limit of the output power of the power supply device 10 can be reduced to improve the stability of the adapter 40.

[0049] In some implementations, please refer to Figure 1 and Figure 3 The rated power of adapter 40 is obtained based on voltage drop characteristics and current power supply, including: The rated power of adapter 40 is obtained based on the preset mapping relationship, voltage drop characteristic information and current power supply.

[0050] The above implementation method can automatically identify the power supply capability of adapter 40.

[0051] Specifically, the preset mapping relationship is a reference table or function relationship corresponding to the rated power, pre-established based on the voltage drop characteristics of the adapter 40 under different load conditions. Through the preset mapping relationship, the voltage drop characteristics and power supply can be matched with the rated power of the adapter 40, thereby realizing the automatic identification of the power supply capacity of the adapter 40 without the need for additional identification hardware.

[0052] Please see Figure 3 The control device 20 provided in the embodiments of the present invention includes a processor 22 and a memory 21; The memory 21 stores a computer program, which, when executed by the processor 22, implements the steps of the power adaptive matching method in any of the above embodiments.

[0053] Please see Figure 3 The POE system 100 provided in this embodiment includes the control device 20 described in the above embodiment.

[0054] Specifically, the control device 20 can be electrically connected to the power supply device 10 to control the power supply power of the power supply device 10 to the power receiving device 30.

[0055] The present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor 22, implements the steps of the power adaptive matching method of any of the above embodiments.

[0056] In some implementations, when the computer program is executed by processor 22, the implemented power adaptive matching method includes: Step S01: Collect the first output voltage of adapter 40 under no-load conditions; Step S02: Control the power supply device 10 to supply power to the power receiving device 30 with multiple different power supplies and monitor the second output voltage of the adapter 40 under the power supply power in real time; Step S03: Obtain voltage drop characteristic information of adapter 40 based on the first output voltage and the second output voltage; Step S04: Obtain the rated power of adapter 40 based on the voltage drop characteristic information of adapter 40 and the current power supply. Step S05: Adjust the output power of the power supply device 10 according to the rated power of the adapter 40.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more steps for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, combinations, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for power adaptive matching of a POE system, characterized in that, The PoE system includes an adapter, a power supply device, and at least one power receiving device, wherein the adapter is electrically connected to the at least one power receiving device through the power supply device; The power adaptive matching method includes: Collect the first output voltage of the adapter under no-load conditions; The power supply device is controlled to supply power to the powered device at multiple different power levels, and the second output voltage of the adapter corresponding to the power level is monitored in real time. The voltage drop characteristic information of the adapter is obtained based on the first output voltage and the second output voltage; The rated power of the adapter is obtained based on the voltage drop characteristics of the adapter and the current power supply. The output power of the power supply device is adjusted according to the rated power of the adapter.

2. The power adaptive matching method according to claim 1, characterized in that, The voltage sag characteristic information of the adapter includes voltage sag depth and voltage sag recovery time. Obtaining the voltage sag characteristic information of the adapter based on the first output voltage and the second output voltage includes: The voltage drop rate and the voltage drop depth are obtained based on the first output voltage and the second output voltage; When the second output voltage is less than a preset voltage threshold or the voltage drop rate is greater than a preset rate threshold, the power supply device is controlled to stop supplying power to the power receiving device and the voltage drop recovery time is determined.

3. The power adaptive matching method according to claim 1, characterized in that, Controlling the power supply equipment to supply power to the power receiving equipment at multiple different power levels includes: The power supply equipment is controlled to increase the power supply to the power receiving equipment in a step-by-step manner, and the power supply is maintained for a preset duration at each power supply level.

4. The power adaptive matching method according to claim 1, characterized in that, Adjusting the output power of the power supply device according to the rated power of the adapter includes: The upper limit of the output power of the power supply equipment is determined based on the rated power of the adapter and the preset safety factor; The output power of the power supply equipment is adjusted according to the upper limit of the output power.

5. The power adaptive matching method according to claim 4, characterized in that, The PoE system includes multiple powered devices, and adjusting the output power of the power supply device according to the rated power of the adapter includes: The power supply equipment is controlled to dynamically allocate power to the multiple power receiving devices according to the upper limit of the output power.

6. The power adaptive matching method according to claim 5, characterized in that, The power adaptive matching method further includes: During the operation of the PoE system, the output electrical parameters of the power supply equipment are monitored in real time, and the upper limit of the output power of the power supply equipment is dynamically adjusted according to the output electrical parameters of the power supply equipment.

7. The power adaptive matching method according to claim 1, characterized in that, The rated power of the adapter is obtained based on the voltage drop characteristic information and the current power supply, including: The rated power of the adapter is obtained based on the preset mapping relationship, the voltage drop characteristic information, and the current power supply.

8. A control device, characterized in that, Including processor and memory; The memory stores a computer program, which, when executed by the processor, implements the steps of the power adaptive matching method according to any one of claims 1-7.

9. A PoE system, characterized in that, Includes the control device as described in claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the power adaptive matching method according to any one of claims 1-7.

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