PD power-on impact current suppression method and device and network cable

Abstract

The invention relates to the technical field of network communication, in particular to a PD power-on impact current suppression method and device and a network cable. The method comprises the following steps of: providing a section of standard 8-core network cable; a group of electronic components are additionally arranged on one side, close to the power supply equipment, of the network cable, and the electronic components comprise a plurality of current-limiting resistors and capacitors; a capacitor is connected in series between the two wire cores of each wire pair and is used for absorbing instantaneous impact current during power-on; and a current-limiting resistor is connected to each wire core and is used for limiting the output current on the network cable and providing a maintenance access point. According to the invention, electronic components are designed on the network cable structure, so that the technical problem that the connection reliability of subsequent power supply equipment and power receiving equipment is difficult to realize at low cost in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of network communication technology, and in particular to a method, a device and a network cable for suppressing power-on surge current of a PD. Background Art

[0002] With the rapid development of electronic products and the increasing demand for network cabling, POE technology has been widely used in various network devices. However, due to the uneven quality of power supply equipment and powered equipment, the problem of inrush current during power-on has become an important factor affecting equipment stability and network quality. Existing solutions mainly focus on replacing power supply equipment or improving the tolerance of powered equipment, but these methods are not only costly but also difficult to implement in practical applications. Summary of the invention

[0003] The present invention provides a method, a device and a network cable for suppressing power-on surge current of a PD to solve the technical problem of how to achieve the connection reliability of subsequent power supply equipment and powered equipment at low cost.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] On the one hand, a method for suppressing power-on surge current of a PD is provided, the method comprising the steps of:

[0006] Provide a standard 8-core network cable;

[0007] A set of electronic components is installed on the side of the network cable close to the power supply device, and the electronic components include multiple current limiting resistors and capacitors;

[0008] A capacitor is connected in series between the two cores of each line pair to absorb the instantaneous impact current when power is turned on;

[0009] Connect a current-limiting resistor to each wire core to limit the output current on the network cable and provide a maintenance access point;

[0010] The voltage on the network line is monitored in real time through the voltage detection circuit to calculate the current value and detect the device status;

[0011] When voltage abnormality is detected, the current on the line core is automatically adjusted through the synergistic effect of current limiting resistors and capacitors to ensure safe startup of the powered equipment;

[0012] Crimp ordinary crystal plugs at both ends of the network cable to connect the power supply device and the powered device.

[0013] Furthermore, the capacitance of the capacitors is 10 μF, a capacitor is connected in series between the two wire cores of each wire pair, and the multiple capacitors between each wire pair are not connected to each other.

[0014] Furthermore, the resistance of the current limiting resistor is 20Ω, and each wire core is connected to a current limiting resistor, and the current limiting resistors are not connected to each other.

[0015] Furthermore, the voltage detection circuit includes a voltage measuring unit and a current measuring unit, which are used to monitor the voltage and current on the network cable in real time.

[0016] Furthermore, the voltage detection circuit further includes a data analysis unit, which calculates the current value by the following expression:

[0017] Among them, I is the current current value, V is the output voltage of the power supply equipment, V PD is the input voltage of the powered device, R 总 It is the total resistance of all current-limiting resistors in the network cable.

[0018] Furthermore, the synergy of current limiting resistors and capacitors is achieved through the following algorithm:

[0019] When a voltage anomaly is detected, the voltage detection circuit generates a control signal;

[0020] The control signal triggers a current regulation module, which calculates the regulated current using the following expression:

[0021] Among them, I 调节 is the adjusted current value, I 初始 is the initial current value, V 异常 is the detected abnormal voltage, V 正常 is the normal voltage value;

[0022] The current regulation module adjusts the resistance value of the current limiting resistor according to the calculation result to ensure the safe startup of the powered device.

[0023] Furthermore, the electronic component also includes an adaptive regulation module, which realizes real-time adaptive regulation of current through the following algorithm:

[0024] The adaptive regulation module calculates the resistance value of the new current limiting resistor according to the voltage and current values ​​detected in real time through the following expression:

[0025] Among them, R 新 is the resistance value of the new current limiting resistor, R 初始 is the initial resistance value, I 实时 is the real-time current value, I 目标 is the target current value;

[0026] The adaptive regulation module adjusts the current on each line pair according to the resistance value of the new current limiting resistor to ensure the stable operation of the powered device.

[0027] Furthermore, the electronic component further includes a fault detection module, which detects whether a short circuit fault occurs in the network cable by using the following algorithm:

[0028] When a voltage anomaly is detected, the fault detection module triggers a voltage comparison unit, which compares the current voltage with a preset normal voltage range;

[0029] If the current voltage is lower than the lower limit of the preset normal voltage range, the fault detection module generates a fault signal;

[0030] The fault signal triggers an alarm unit for sending an alarm message to the user.

[0031] On the other hand, a device for suppressing power-on surge current of a PD is provided, the device comprising:

[0032] A standard 8-core network cable, which is divided into 4 pairs;

[0033] A 10μF capacitor is connected in series between the two cores of each line pair to absorb the instantaneous impact current when power is turned on;

[0034] A 20Ω current-limiting resistor is connected to each wire core to limit the output current of the network cable and provide a maintenance access point;

[0035] A voltage detection circuit, including a voltage measurement unit, a current measurement unit and a data analysis unit, for real-time monitoring of the voltage and current on the network line;

[0036] A current regulating module, which adjusts the resistance value of the current limiting resistor according to the control signal of the voltage detection circuit to ensure the safe startup of the powered device;

[0037] A fault detection module, used to detect whether a short circuit occurs in the network cable and send an alarm message;

[0038] An adaptive adjustment module dynamically adjusts the resistance of the current limiting resistor according to the voltage and current values ​​detected in real time to ensure the stable operation of the powered device;

[0039] Crystal connectors are crimped at both ends of the network cable to connect the power supply device and the powered device.

[0040] On the other hand, a PD power-on surge current suppression network cable is provided, the network cable includes the PD power-on surge current suppression device as above, and the connection method of the 20Ω current limiting resistor connected to each wire core and the 10μF capacitor of each wire pair is as follows:

[0041] A 10μF capacitor is connected in series between the two wire cores of each wire pair, and the capacitors of each pair of wires are not connected to each other;

[0042] Connect a 20Ω fixed resistor to each of the two wire cores of each wire pair, and the resistors between different wire pairs are not connected to each other;

[0043] The voltage detection circuit is connected to each current limiting resistor and each capacitor through the data line to monitor the voltage and current on the network line in real time;

[0044] The current regulation module, the fault detection module and the adaptive regulation module are connected to each current limiting resistor and each capacitor through control lines to realize current regulation and fault detection functions;

[0045] Crystal connectors are crimped at both ends of the network cable to connect the power supply device and the powered device.

[0046] The beneficial effects of the present invention are:

[0047] The present invention solves the technical problem that it is difficult to achieve the reliability of subsequent connection between power supply equipment and powered equipment at low cost in the prior art by designing electronic components on the network cable structure. The method of the present invention not only effectively suppresses the impact current of the PD device when it is powered on, but also provides real-time voltage and current monitoring functions by adding electronic components, including fixed resistors and capacitors, on the side of the network cable close to the power supply device, so as to facilitate the user to carry out maintenance and repair. It can be understood that by connecting a 10μF capacitor in series between the two cores of each line pair, the instantaneous impact current at power-on can be absorbed to prevent the powered equipment from being damaged. At the same time, a 20Ω fixed resistor is connected to each core, which not only limits the current, but also provides multiple access points that are convenient for measurement and maintenance, ensuring that the user can understand the current and voltage status on the network cable in real time. In addition, through the synergistic effect of the voltage detection circuit and the current limiting resistor, the present invention can automatically adjust the current when the voltage abnormality is detected to ensure the safe startup of the powered equipment. This method is not only simple to operate and low in cost, but also can improve the reliability and stability of network equipment in practical applications, and reduce the risk of equipment damage caused by power-on impact current.

[0048] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a flow chart of a method for suppressing PD power-on surge current in one embodiment of the present invention;

[0050] Figure 2 The schematic diagram is a schematic diagram of the principle of a PD power-on surge current suppression device and a network cable in one embodiment of the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The term "comprise" and any variation thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. In addition, the use of "and / or" in the specification and claims to indicate at least one of the connected objects, such as A and / or B, means including A alone, B alone, and A and B.

[0053] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0054] In order to facilitate understanding of the technical solution of the present application, firstly, a brief introduction is given to the relevant concepts and technical features involved in the embodiments of the present application:

[0055] PD (Power Device) is the client device in the POE system, such as IP phones, network security cameras, APs, PDAs and many other Ethernet devices. According to the POE power supply workflow (reference: POE Basics), there should be a signature circuit for detection and a PD power consumption classification circuit (optional) on the PD side. Through the detection of the PSE power supply equipment, a stable 48V power supply voltage is obtained. However, in general circuits, the 48V voltage is too high, and a power converter is required to convert the 48V voltage to a suitable voltage; so the circuit on the PD device side will consist of a signature circuit, a power consumption classification circuit and a power conversion circuit.

[0056] The present invention provides the following preferred embodiments:

[0057] Embodiment 1

[0058] In order to solve the technical problem in the prior art that it is difficult to achieve low-cost connection reliability between subsequent power supply equipment and powered equipment, this embodiment proposes a PD power-on surge current suppression method to ensure that the power-on surge current is effectively suppressed inside the network cable and provide real-time monitoring and maintenance functions.

[0059] like Figure 1 As shown, the steps of the PD power-on surge current suppression method include:

[0060] S100, provide a standard 8-core network cable.

[0061] S200. Install a group of electronic components on a side of the network cable close to the power supply device. The electronic components include multiple current limiting resistors and capacitors.

[0062] S300, a capacitor is connected in series between the two wire cores of each wire pair to absorb the instantaneous impact current when power is turned on.

[0063] S400, connect a current limiting resistor to each wire core to limit the output current of the network cable and provide a maintenance access point.

[0064] S500, monitor the voltage on the network cable in real time through the voltage detection circuit to calculate the current value and detect the device status.

[0065] S600, when voltage abnormality is detected, the current on the line core is automatically adjusted through the synergistic effect of current limiting resistors and capacitors to ensure safe startup of the powered equipment.

[0066] S700, crimp common crystal plugs at both ends of the network cable to connect the power supply device and the powered device.

[0067] Specifically, 8-core network cables are commonly used in POE (Power over Ethernet) power supply systems, which can transmit data and power at the same time. In order to achieve the purpose of the present invention, it is necessary to install a group of electronic components on the side of the network cable close to the power supply device, and this group of electronic components includes multiple current-limiting resistors and capacitors. Specifically, a 10μF capacitor is connected in series between each wire pair (i.e., each pair of two wire cores) to absorb the instantaneous impact current when power is turned on. The selection of this capacitor is based on its common withstand voltage value of 100V, which can withstand the 54V output voltage of POE power supply, and can effectively absorb instantaneous large current when powered on to prevent the powered equipment from being damaged by the impact current.

[0068] Furthermore, a 20Ω current-limiting resistor is connected to each wire core to limit the output current on the network cable and provide an access point for maintenance. The function of these current-limiting resistors is to ensure that the current on the network cable does not exceed the safety threshold, thereby protecting the powered equipment. At the same time, these resistors also provide multiple measurement points for the voltage detection circuit, allowing users to monitor the voltage and current status on the network cable at any time, which is convenient for maintenance and repair. It should be understood that these current-limiting resistors are connected to each of the two wire cores of each wire pair, and the resistors between different wire pairs are not connected to each other to ensure the independence and accuracy of current regulation.

[0069] Furthermore, a voltage detection circuit is used to monitor the voltage on the network cable in real time to calculate the current value and detect the device status. This voltage detection circuit usually includes a voltage measurement unit and a current measurement unit. The voltage measurement unit is used to measure the output voltage of the power supply device and the input voltage of the powered device, while the current measurement unit is used to calculate the current current value.

[0070] Furthermore, when the voltage detection circuit detects an abnormal voltage on the network cable, the current on the core is automatically adjusted through the synergistic effect of the current limiting resistor and the capacitor to ensure the safe startup of the powered device. Specifically, the voltage detection circuit generates a control signal, which is transmitted to the current regulation module. The current regulation module adjusts the resistance of the current limiting resistor according to the control signal, thereby reducing the current in a short time and preventing the powered device from being damaged by the impact current. It should be understood that this automatic adjustment mechanism not only improves the safety of the equipment, but also reduces the complexity of manual adjustment by the user.

[0071] Furthermore, ordinary plugs are crimped on both ends of the network cable to connect the power supply device and the powered device. These plugs are standard RJ45 connectors, which can ensure reliable connection between the network cable and the device. Through this simple crimping operation, users can easily connect the improved network cable to the existing POE power supply system without having to replace the entire system or device.

[0072] Through this embodiment, users can suppress the power-on surge current of PD at a low cost, and provide real-time voltage and current monitoring functions to ensure the stability and reliability of network equipment. The benefit of this embodiment is that it solves the problems of high cost and difficulty in implementation in traditional methods through simple improvements to the network cable structure.

[0073] Embodiment 2

[0074] In order to prevent damage to the powered device caused by the power-on surge current in the POE power supply system, the present embodiment further refines the capacitance and connection method of the capacitor to ensure that the instantaneous surge current is effectively absorbed inside the network cable.

[0075] In this embodiment, the capacitor connected in series between the two wire cores of each wire pair is 10μF, and the multiple capacitors between each pair of wires are not connected to each other. This connection method ensures that the capacitors of each wire pair can work independently without interfering with each other. It should be understood that this independent connection method not only improves the efficiency of current absorption, but also prevents the normal operation of other wire pairs from being affected when a problem occurs in a wire pair. Each 10μF capacitor will charge quickly when powered on to absorb the impact current, thereby protecting the powered equipment.

[0076] Through this embodiment, the user can effectively absorb the power-on surge current on the PD while maintaining the main structure of the network cable. The independent connection method of each 10μF capacitor ensures the efficiency and reliability of current absorption, providing users with an economical and practical solution. The benefit of this embodiment is that the current absorption effect is further improved through the capacitors with specific capacitance and the independent connection method, reducing the risk of damage to the powered device.

[0077] Embodiment 3

[0078] In order to solve the problem of power-on surge current damaging the powered device in the POE power supply system, this embodiment further refines the resistance value and connection method of the current limiting resistor to ensure that the output current is effectively limited inside the network cable and provide a maintenance access point.

[0079] In this embodiment, a 20Ω current limiting resistor is connected to each wire core to limit the output current of the network cable and provide an access point for maintenance. The function of these current limiting resistors is to ensure that the current on the network cable does not exceed the safety threshold, thereby protecting the powered equipment. At the same time, these resistors also provide multiple measurement points for the voltage detection circuit, so that the user can monitor the voltage and current status on the network cable at any time, which is convenient for maintenance and repair. It should be understood that these current limiting resistors are connected to each of the two wire cores of each wire pair, and the resistors between different wire pairs are not connected to each other to ensure the independence and accuracy of current regulation.

[0080] Through this embodiment, the user can suppress the power-on surge current of the PD at a low cost, while providing real-time voltage and current monitoring functions to ensure the stability and reliability of network equipment.

[0081] Embodiment 4

[0082] In order to solve the problem of the impact of power-on surge current on the powered equipment in the POE power supply system, this embodiment further optimizes the design of the voltage detection circuit to ensure that the voltage and current on the network cable can be monitored in real time and accurately, thereby providing more reliable current regulation and protection functions.

[0083] In order to achieve the current suppression function, a set of electronic components needs to be installed at both ends of the network cable. This set of electronic components includes a voltage detection circuit, a current limiting resistor and a capacitor. Specifically, a 10μF capacitor is connected in series between the two cores of each wire pair to absorb the instantaneous impact current when power is turned on. This capacitor is selected based on its withstand voltage value of 100V, which can withstand the 54V output voltage of the POE power supply system and effectively absorb large current at the moment of power-on to prevent the powered equipment from being impacted.

[0084] Furthermore, a 20Ω current limiting resistor is connected to each wire core to limit the output current on the network cable and provide a maintenance access point. The function of these current limiting resistors is to ensure that the current on the network cable is within a safe range, thereby protecting the powered equipment. At the same time, the current limiting resistors provide multiple measurement points for the voltage detection circuit, allowing users to monitor the current status on the network cable in real time, facilitating the timely discovery and handling of potential problems. It should be understood that these current limiting resistors are connected to each of the two wire cores of each wire pair, and the resistors between different wire pairs are not connected to each other, ensuring the independence and accuracy of current regulation.

[0085] Furthermore, the voltage detection circuit includes a voltage measurement unit and a current measurement unit, which are used to monitor the voltage and current on the network cable in real time. The voltage measurement unit uses a high-precision voltage sensor, such as the LM358 op amp chip, which can accurately measure the output voltage of the power supply device and the input voltage of the powered device. The current measurement unit uses a Hall effect current sensor, such as the ACS712, which can measure the current in the network cable in a non-contact manner to ensure the accuracy and reliability of the measurement results. These two units are connected to the data analysis unit through a data line. The data analysis unit is responsible for processing the voltage and current data collected in real time and generating corresponding control signals.

[0086] Furthermore, the functional module design of the data analysis unit is based on a microcontroller, such as the STM32 series, which can efficiently process data and quickly generate control signals. Specifically, the data analysis unit first converts the analog signals collected by the voltage sensor and the current sensor into digital signals through the ADC (analog-to-digital converter), and then calculates the current voltage and current values ​​through an internal algorithm. It should be understood that this data processing method can monitor the status of the network line in real time to ensure that it can respond quickly in any abnormal situation.

[0087] Furthermore, the data analysis unit also has a fault diagnosis function. When the voltage or current value is detected to be beyond the preset safety range, the data analysis unit can generate a fault signal and transmit it to the alarm unit through the data line. The alarm unit selects a suitable alarm method, such as a light alarm or a sound alarm, according to the type of fault signal, to promptly notify the user of the abnormal state of the network cable or device. It can be understood that this fault diagnosis and alarm mechanism improves the self-checking capability and user-friendliness of the system.

[0088] Furthermore, the power management module design of the voltage detection circuit is a non-isolated power supply, which uses a linear regulator LM7805 to ensure that the circuit works stably under low power consumption. This power management design not only reduces the cost, but also improves the efficiency and reliability of the circuit. It can be understood that the voltage detection circuit is designed with full consideration of the stability of the power supply to ensure that it can work normally under various working conditions.

[0089] Furthermore, in order to ensure the versatility and compatibility of the voltage detection circuit, the present embodiment also provides an adjustable voltage measurement and current measurement range. Specifically, the voltage measurement unit and the current measurement unit can be adjusted by an external resistor or potentiometer to adapt to different models of power supply equipment and powered equipment. It should be understood that this adjustable design enables the voltage detection circuit to flexibly cope with a variety of application scenarios, thereby improving the applicability of the system.

[0090] Furthermore, in order to solve the problem of temperature influence during long-term operation, this embodiment adds a temperature compensation function to the voltage detection circuit. Specifically, the temperature compensation module uses a temperature sensor, such as LM35, to monitor the ambient temperature in real time and compensate the influence of temperature on the voltage and current measurement results through an algorithm. It can be understood that this temperature compensation mechanism ensures the accuracy of voltage and current measurement, and can work normally even in high or low temperature environments.

[0091] Through this embodiment, users can effectively suppress the power-on surge current of PD at a low cost and provide real-time voltage and current monitoring functions. The optimized design of the voltage detection circuit not only improves the accuracy of the measurement, but also adds fault diagnosis and alarm functions to ensure the safety of the system. The benefit of this embodiment is that the reliability of the system is further improved through the data processing capabilities of the high-precision sensor and microcontroller.

[0092] Embodiment 5

[0093] In order to solve the problem of the impact of power-on surge current on the powered equipment in the POE power supply system, this embodiment further optimizes the design of the voltage detection circuit, adds a data analysis unit, and calculates the current value through a specific expression to ensure that the current on the network cable can be monitored and adjusted in real time and accurately, thereby improving the reliability and safety of the system.

[0094] Specifically, the voltage detection circuit in this embodiment not only includes a voltage measurement unit and a current measurement unit, but also adds a data analysis unit. The core function of the data analysis unit is to process the measurement data of voltage and current in real time through a complex algorithm to generate an accurate current value calculation result. Specifically, the data analysis unit adopts a high-performance microcontroller, such as the STM32 series, which has powerful data processing capabilities and fast response speed. The microcontroller converts the analog signals collected by the voltage measurement unit and the current measurement unit into digital signals through an ADC (analog-to-digital converter), and then performs data processing and analysis.

[0095] Furthermore, the voltage measurement unit uses a high-precision voltage sensor, such as the LM358 op amp chip, which can accurately measure the output voltage of the power supply device and the input voltage of the powered device. The current measurement unit uses a Hall effect current sensor, such as the ACS712, which can measure the current in the network cable in a non-contact manner to ensure the accuracy and reliability of the measurement results. It should be understood that the selection of high-precision sensors is an important basis for ensuring the accuracy of voltage and current measurements, which helps the data analysis unit generate reliable control signals.

[0096] Furthermore, the data analysis unit calculates the current value by the following expression:

[0097] Among them, I is the current current value, V is the output voltage of the power supply equipment, V PD is the input voltage of the powered device, R 总 The total resistance of all current-limiting resistors in the network cable. Specifically, the data analysis unit calculates the current value on the network cable in real time based on the data collected by the voltage measurement unit and the current measurement unit. This calculation method can accurately reflect the actual working status of the current network cable and provide reliable data support for subsequent current regulation and fault detection.

[0098] Furthermore, in order to improve the stability and reliability of the system, the data analysis unit also has a data filtering function. Specifically, the data analysis unit uses a digital filter, such as a FIR (finite impulse response) filter or an IIR (infinite impulse response) filter, to filter the collected voltage and current data to eliminate noise and interference signals. It can be understood that the addition of the filtering function enables the data analysis unit to generate more stable and reliable calculation results, thereby improving the overall performance of the system.

[0099] Furthermore, the data analysis unit also works in conjunction with a current regulation module. When the calculated current value exceeds the preset safety threshold, the data analysis unit generates a control signal and transmits it to the current regulation module. According to this control signal, the current regulation module reduces the current by adjusting the resistance of the current limiting resistor to ensure the safe startup and operation of the powered device. It should be understood that this control signal transmission and response mechanism can quickly adjust the current limiting resistor to prevent excessive current from causing damage to the powered device.

[0100] Furthermore, the data analysis unit also has data recording and analysis functions. Specifically, the data analysis unit can store the real-time measured voltage and current data in the internal memory, and generate various statistical reports through data analysis algorithms. These reports can help users understand the working status of the network cable and discover potential problems in time. It can be understood that the addition of data recording and analysis functions provides users with more diagnostic tools and improves the maintenance and management efficiency of the system.

[0101] Furthermore, in order to further enhance the self-checking capability of the system, the data analysis unit is also connected to a fault detection module. The fault detection module determines whether the network cable is faulty by monitoring the voltage and current data in real time. When an abnormal voltage or current value is detected, the fault detection module generates a fault signal and transmits it to the alarm unit. The alarm unit selects an appropriate alarm method, such as a light alarm or a sound alarm, according to the type of fault signal, to promptly notify the user of the abnormal state of the network cable or device. It can be understood that this fault detection and alarm mechanism can quickly detect and handle potential faults, ensuring that the system always operates in a safe state.

[0102] Furthermore, the data analysis unit also has a remote monitoring function. By connecting to an external network device, the data analysis unit can transmit the real-time measured voltage and current data to a remote server, and the user can view this data in real time through the network platform. This remote monitoring function not only facilitates the user's management and maintenance, but also can monitor multiple POE power supply systems at multiple locations at the same time, improving the management efficiency of the system. It should be understood that the addition of the remote monitoring function enables users to obtain system status information anytime and anywhere, enhancing the flexibility of the system.

[0103] Furthermore, the data analysis unit is also connected to a communication module, which is responsible for data transmission and communication. Specifically, the communication module can adopt wired or wireless communication, such as Ethernet, Wi-Fi, Bluetooth or Zigbee. Through this communication module, the data analysis unit can transmit voltage and current data to external devices in real time, such as a monitoring center or a user terminal. It can be understood that the choice of communication module can be flexibly configured according to the needs of actual application scenarios, thereby improving the applicability and scalability of the system.

[0104] Furthermore, in order to ensure the stability and reliability of the data analysis unit, a power management module is also designed in this embodiment. The power management module uses a linear regulator LM7805 to ensure that the data analysis unit works stably under low power consumption conditions. At the same time, the power management module also has overvoltage protection and overcurrent protection functions to effectively prevent the impact of power failure on the data analysis unit. It should be understood that the design of the power management module ensures that the data analysis unit can work normally under various working conditions, thereby improving the overall stability of the system.

[0105] Through this embodiment, users can effectively suppress the power-on surge current of PD at a low cost and provide real-time voltage and current monitoring functions. The addition of the data analysis unit enables the system to accurately calculate the current current value and adjust the resistance value of the current limiting resistor in time to ensure the safe startup and stable operation of the powered device.

[0106] Embodiment 6

[0107] In order to solve the current shock problem caused by abnormal voltage in the POE power supply system, this embodiment further optimizes the design of the voltage detection circuit, adds a synergistic mechanism of current limiting resistors and capacitors, and implements current regulation through a specific algorithm to ensure safe startup of the powered equipment.

[0108] First, the voltage detection circuit in this embodiment not only includes a voltage measurement unit and a current measurement unit, but also introduces a control signal generation module. The voltage measurement unit monitors the output voltage of the power supply device and the input voltage of the power receiving device in real time through a high-precision voltage sensor, such as the LM358 op amp chip. When a voltage abnormality is detected, the voltage measurement unit triggers the control signal generation module to generate a control signal. The design of the control signal generation module is based on logic gate circuits, such as AND gates and OR gates, and generates corresponding control signals according to the type and degree of voltage abnormality.

[0109] Furthermore, the control signal generated by the control signal generation module is transmitted to the current regulation module. The current regulation module uses an adjustable resistor, such as a digital potentiometer, which can adjust the resistance value of the current limiting resistor in real time according to the control signal. Specifically, the current regulation module calculates the adjusted current value through the following expression:

[0110] Among them, I 调节 is the adjusted current value, I 初始 is the initial current value, V 异常 is the detected abnormal voltage, V 正常 This is the normal voltage value.

[0111] Furthermore, the current regulating module adjusts the resistance of the current limiting resistor according to the calculation result. Specifically, the current regulating module is connected to the current limiting resistor on each line pair through the control line, and adjusts the resistance of each current limiting resistor according to the calculated adjustment current value. This adjustment mechanism can quickly reduce the current on the network line when the voltage is abnormal to protect the powered device. It can be understood that the design of the current regulating module ensures the adjustment accuracy and response speed of the current limiting resistor, and improves the safety and reliability of the system.

[0112] Furthermore, this embodiment also introduces a current buffer module, which absorbs the transient current impact generated during the adjustment process of the current regulation module by adding a buffer capacitor, such as a 100μF electrolytic capacitor, between the current limiting resistor and the powered device. The current buffer module can not only protect the powered device, but also ensure a smooth transition of the current regulation process to avoid the impact of sudden current changes on the device. It should be understood that the design of the current buffer module is based on the charging and discharging characteristics of the capacitor, and can provide an effective buffering effect during the current regulation process.

[0113] Furthermore, in order to improve the self-checking capability of the system, the voltage detection circuit in this embodiment also includes a status monitoring unit. The status monitoring unit generates a status report by monitoring the working status of the voltage detection circuit and the current regulation module in real time. These status reports can help users understand the operation of the system and promptly discover and deal with potential problems. It can be understood that the design of the status monitoring unit increases the transparency and maintenance convenience of the system and improves the user's trust in the system.

[0114] Furthermore, the voltage detection circuit is also connected to an external communication interface, which can be a standard Ethernet interface or USB interface, for transmitting status reports and real-time data to external devices, such as a monitoring center or a user terminal. The design of this communication interface enables users to remotely monitor the status of the system, thereby improving the management efficiency of the system. It should be understood that the selection of the external communication interface can be flexibly configured according to the needs of the actual application scenario, thereby enhancing the scalability and applicability of the system.

[0115] The benefit of this embodiment is that the synergistic mechanism of the current limiting resistor and capacitor, as well as the precise current regulation algorithm, ensures the safe startup of the powered device under abnormal voltage conditions. In addition, the addition of the current buffer module and the status monitoring unit further improves the stability and self-checking capability of the system, providing users with a more reliable POE power supply solution.

[0116] Embodiment 7

[0117] In order to solve the problem that the powered equipment in the POE power supply system requires stable current under different working conditions, this embodiment further optimizes the design of the voltage detection circuit, adds an adaptive adjustment module, and dynamically adjusts the resistance value of the current limiting resistor by real-time monitoring of the voltage and current values ​​to ensure the stable operation of the powered equipment.

[0118] First, the voltage detection circuit in this embodiment not only includes a voltage measurement unit and a current measurement unit, but also adds an adaptive adjustment module. The core function of the adaptive adjustment module is to dynamically adjust the resistance of the current limiting resistor through a specific algorithm according to the voltage and current values ​​detected in real time. Specifically, the adaptive adjustment module adopts a high-performance microcontroller, such as the STM32 series, which has powerful data processing capabilities and fast response speed. The microcontroller converts the analog signals collected by the voltage measurement unit and the current measurement unit into digital signals through an ADC (analog-to-digital converter), and then performs data processing and analysis.

[0119] Furthermore, the adaptive regulation module calculates the resistance value of the new current limiting resistor by the following expression:

[0120] Among them, R 新 is the resistance value of the new current limiting resistor, R 初始 is the initial resistance value, I 实时 is the real-time current value, I 目标 is the target current value. It is understood that the adaptive adjustment module calculates the current limiting resistor value that needs to be adjusted based on the real-time measured current value and the target current value, and transmits the new resistance value to the current limiting resistor through the control line. It should be understood that this dynamic adjustment mechanism can ensure the stability of the current under different working conditions and improve the operating reliability of the powered equipment.

[0121] The adaptive regulation module adjusts the current on each line pair according to the resistance value of the new current limiting resistor to ensure the stable operation of the powered device.

[0122] Furthermore, the adaptive adjustment module also has a data filtering function. Specifically, the adaptive adjustment module uses a digital filter, such as a FIR (finite impulse response) filter or an IIR (infinite impulse response) filter, to filter the collected voltage and current data to eliminate noise and interference signals. It can be understood that the addition of the filtering function enables the adaptive adjustment module to generate more stable and reliable calculation results, thereby improving the overall performance of the system.

[0123] Furthermore, the adaptive adjustment module also works in conjunction with a current monitoring unit. The current monitoring unit determines whether adaptive adjustment is required by monitoring the current value on the network cable in real time. When the real-time current value deviates from the target current value by more than a preset threshold, the current monitoring unit generates an adjustment signal and transmits it to the adaptive adjustment module. The adaptive adjustment module recalculates the resistance value of the current limiting resistor and adjusts it according to the adjustment signal. It should be understood that this transmission and response mechanism of the adjustment signal can quickly adjust the current limiting resistor to ensure that the current is always within the target range.

[0124] Furthermore, the adaptive adjustment module also has a fault detection function. Specifically, the adaptive adjustment module determines whether there is an abnormality in the network cable by monitoring the voltage and current data in real time. When it is detected that the voltage or current value exceeds the preset safety range, the adaptive adjustment module will generate a fault signal and transmit it to the alarm unit through the data line. The alarm unit selects an appropriate alarm method, such as a light alarm or a sound alarm, according to the type of fault signal, to promptly notify the user of the abnormal state of the network cable or device. It can be understood that the addition of fault detection and alarm functions further improves the self-checking capability and safety of the system.

[0125] Furthermore, in order to improve the efficiency and reliability of the system, the adaptive adjustment module is also connected to an energy management unit. The energy management unit optimizes the resistance adjustment strategy of the current limiting resistor by monitoring the energy consumption of the network line in real time. Specifically, the energy management unit analyzes the real-time current and voltage data through an algorithm, generates a power saving mode and a performance optimization mode, and enables the adaptive adjustment module to work in different modes. It can be understood that the design of the energy management unit enables the system to improve energy efficiency and operating efficiency while ensuring safety.

[0126] Through this embodiment, users can achieve stable current operation of the powered equipment under different working conditions, and dynamically adjust the resistance value of the current limiting resistor through the adaptive adjustment module. The addition of the current monitoring unit and the fault detection unit further improves the self-checking capability and safety of the system, and the energy management unit optimizes the energy efficiency and operating efficiency of the system.

[0127] Embodiment 8

[0128] In order to solve the current shock problem caused by short circuit faults in the POE power supply system, this embodiment further optimizes the design of the voltage detection circuit, adds a fault detection module, detects whether a short circuit fault occurs in the network cable through a specific algorithm, and sends an alarm message to the user.

[0129] First, the voltage detection circuit in this embodiment not only includes a voltage measurement unit and a current measurement unit, but also adds a fault detection module. The core function of the fault detection module is to determine whether a short circuit fault occurs in the network cable by monitoring the voltage and current data in real time. Specifically, the fault detection module uses a high-performance microcontroller, such as the STM32 series, which has powerful data processing capabilities and fast response speed. The microcontroller converts the analog signals collected by the voltage measurement unit and the current measurement unit into digital signals through an ADC (analog-to-digital converter), and then performs data processing and analysis.

[0130] Furthermore, when the voltage measurement unit detects a voltage anomaly, the fault detection module triggers the voltage comparison unit. The voltage comparison unit is responsible for comparing the current voltage with the preset normal voltage range. Specifically, the voltage comparison unit uses a comparator chip, such as LM339, which can accurately compare the current voltage with the preset voltage range. If the current voltage is lower than the lower limit of the preset normal voltage range, the voltage comparison unit generates a fault signal and passes it to the fault detection module. It should be understood that the design of the voltage comparison unit ensures that the fault detection module can judge the voltage anomaly in a timely and accurate manner.

[0131] Furthermore, the fault detection module determines whether it is a short circuit fault according to the fault signal generated by the voltage comparison unit. Specifically, the fault detection module analyzes the type and strength of the fault signal through an algorithm to determine whether it is a short circuit fault. When it is determined to be a short circuit fault, the fault detection module generates a fault signal and transmits it to the alarm unit through the data line. The alarm unit selects an appropriate alarm method, such as a light alarm or a sound alarm, according to the type of the fault signal, to promptly notify the user of the abnormal state of the network cable or device. It can be understood that this fault detection and alarm mechanism can quickly detect and handle short circuit faults to ensure the safe operation of the system.

[0132] Furthermore, the fault detection module also has a fault recording function. Specifically, the fault detection module can store the detected fault type, fault time and other relevant data in the internal memory and generate a fault report. These fault reports can help users understand the fault history of the system and promptly discover and deal with potential problems. It should be understood that the addition of the fault recording function provides users with more diagnostic tools and improves the maintenance and management efficiency of the system.

[0133] Furthermore, in order to enhance the self-checking capability of the system, the fault detection module is also connected to a self-checking unit. The self-checking unit ensures the normal operation of the system by regularly checking the working status of the voltage detection circuit and the fault detection module. Specifically, the self-checking unit can be set to perform a self-check every ten minutes, and check the working status of each component through a built-in self-checking algorithm. If any abnormality is found, the self-checking unit will generate a self-checking report and transmit it to the user terminal via the data line. It can be understood that the design of the self-checking unit enhances the self-checking capability of the system and improves the stability and reliability of the system.

[0134] Furthermore, in order to further improve the safety of the system, the fault detection module is also connected to a safety protection unit. The safety protection unit is responsible for immediately cutting off the output of the power supply device when a short circuit fault is detected to prevent the current from continuing to pass through the network cable to cause damage to the powered device. Specifically, the safety protection unit can use switching devices such as relays or MOSFETs to respond according to the fault signal generated by the fault detection module. It can be understood that the design of the safety protection unit ensures that the power supply can be quickly cut off in the event of a short circuit fault to protect the safety of the powered device.

[0135] Through this embodiment, users can take prompt measures to ensure the safe operation of the powered equipment when voltage anomalies and short circuit faults are detected. The addition of the fault recording function and the self-checking unit further improves the maintenance and management efficiency of the system, and the safety protection unit enhances the safety of the system. This embodiment ensures timely response and protection of the system in the event of a short circuit fault through the fault detection module and related mechanisms.

[0136] Embodiment 9

[0137] In order to solve the problem of the impact of power-on surge current on the powered device in the POE power supply system, this embodiment proposes a PD power-on surge current suppression device, including a voltage detection circuit, a current regulation module, a fault detection module and an adaptive regulation module to ensure the safe startup and stable operation of the powered device.

[0138] like Figure 2 As shown, the device in this embodiment includes a standard 8-core network cable, which is divided into 4 pairs. A 10μF capacitor is connected in series between the two cores of each pair to absorb the instantaneous impact current when power is turned on. A 20Ω current limiting resistor is connected to each core to limit the output current on the network cable and provide a maintenance access point. The selection of these capacitors and current limiting resistors is based on their withstand voltage and resistance to ensure that the impact current can be effectively absorbed and the output current can be limited in the POE power supply system.

[0139] Furthermore, the device of this embodiment also includes a voltage detection circuit, which includes a voltage measurement unit, a current measurement unit and a data analysis unit. The voltage measurement unit uses a high-precision voltage sensor, such as the LM358 op amp chip, which can accurately measure the output voltage of the power supply device and the input voltage of the powered device. The current measurement unit uses a Hall effect current sensor, such as ACS712, which can measure the current in the network cable in a non-contact manner to ensure the accuracy and reliability of the measurement results. It should be understood that the selection of high-precision sensors is an important basis for ensuring the accuracy of voltage and current measurements, and helps to generate reliable control signals.

[0140] Furthermore, the data analysis unit processes the voltage and current data in real time through a specific algorithm to calculate the current current value.

[0141] Furthermore, the device also includes a current regulating module, which adjusts the resistance of the current limiting resistor according to the control signal generated by the voltage detection circuit to ensure the safe startup of the powered device. Specifically, when the current value calculated by the data analysis unit exceeds the preset safety threshold, the current regulating module will reduce the current by adjusting the resistance of the current limiting resistor. The current regulating module uses an adjustable resistor, such as a digital potentiometer, which can adjust the resistance of the current limiting resistor in real time according to the control signal. It can be understood that the design of the current regulating module ensures that it can respond quickly and adjust the current when the voltage is abnormal, preventing excessive current from causing damage to the powered device.

[0142] Furthermore, the device also includes a fault detection module for detecting whether a short circuit fault occurs in the network cable and sending an alarm message. The fault detection module determines whether a short circuit fault occurs in the network cable by monitoring the voltage and current data in real time. Specifically, when the voltage measurement unit detects a voltage abnormality, the fault detection module triggers the voltage comparison unit. The voltage comparison unit determines whether it is a short circuit fault by comparing the current voltage with the preset normal voltage range. If the current voltage is lower than the lower limit of the preset normal voltage range, the fault detection module generates a fault signal and transmits it to the alarm unit through the data line. The alarm unit selects an appropriate alarm mode, such as a light alarm or a sound alarm, according to the type of fault signal, to promptly notify the user of the abnormal state of the network cable or device. It should be understood that this fault detection and alarm mechanism can quickly detect and handle short circuit faults to ensure the safe operation of the system.

[0143] Furthermore, the device also adds an adaptive adjustment module, which dynamically adjusts the resistance of the current limiting resistor by real-time monitoring of the voltage and current values ​​to ensure the stable operation of the powered equipment.

[0144] Furthermore, in order to improve the management efficiency of the system, the device also has a remote monitoring function. Specifically, the voltage detection circuit, current regulation module, fault detection module and adaptive regulation module are connected to the external network device through a data cable, and the user can view the system status information in real time through the network platform. This remote monitoring function not only facilitates the user's management and maintenance, but also can monitor multiple POE power supply systems at multiple locations at the same time. It can be understood that the addition of the remote monitoring function enables users to obtain system status information anytime and anywhere, enhancing the flexibility and user-friendliness of the system.

[0145] Through this embodiment, users can achieve stable current operation of the powered equipment under different working conditions, and take prompt measures in case of voltage anomalies and short circuit faults to ensure safe startup and stable operation of the powered equipment. The design of this device provides comprehensive monitoring and protection functions through the collaborative work of multiple functional modules.

[0146] Embodiment 10

[0147] In order to solve the problem of the impact of power-on surge current on the powered device in the POE power supply system, this embodiment further optimizes the PD power-on surge current suppression method and proposes a PD power-on surge current suppression network cable with multiple functional modules. Through the synergistic effect of current limiting resistors and capacitors, the safe startup and stable operation of the powered device are ensured.

[0148] First, the network cable in this embodiment includes four wire pairs, and a 10μF capacitor is connected in series between the two wire cores of each wire pair to absorb the instantaneous impact current when power is turned on. A 20Ω fixed resistor is connected to each wire core to limit the output current of the network cable and provide a maintenance access point. The selection of these capacitors and fixed resistors is based on their withstand voltage and resistance to ensure that they can effectively absorb impact current and limit output current in the POE power supply system. It should be understood that the capacitors and fixed resistors are designed to effectively absorb impact current at the moment of power-on to prevent damage to the powered equipment.

[0149] Furthermore, the network cable in this embodiment is also equipped with a voltage detection circuit. The voltage detection circuit includes a voltage measurement unit, a current measurement unit and a data analysis unit, which are used to monitor the voltage and current on the network cable in real time. The voltage measurement unit uses a high-precision voltage sensor, such as the LM358 op amp chip, which can accurately measure the output voltage of the power supply device and the input voltage of the power receiving device. The current measurement unit uses a Hall effect current sensor, such as ACS712, which can measure the current in the network cable in a non-contact manner to ensure the accuracy and reliability of the measurement results. The data analysis unit is responsible for processing the voltage and current data collected in real time and generating corresponding control signals. It should be understood that the design of the high-precision sensor and the data analysis unit ensures the accuracy and reliability of real-time monitoring, and provides a solid foundation for subsequent current regulation and fault detection.

[0150] Furthermore, a current regulating module is integrated into the network cable. The current regulating module adjusts the resistance of the current limiting resistor according to the control signal generated by the voltage detection circuit to ensure the safe startup of the powered device. Specifically, when the data analysis unit detects that the current value exceeds the preset safety threshold, the current regulating module adjusts the resistance of the current limiting resistor through the control line. The current regulating module uses an adjustable resistor, such as a digital potentiometer, which can adjust the resistance of the current limiting resistor in real time according to the control signal. It can be understood that the design of the current regulating module ensures that it can respond quickly and adjust the current when the voltage is abnormal, preventing excessive current from causing damage to the powered device.

[0151] Furthermore, the network cable in this embodiment also adds a fault detection module for detecting whether a short circuit fault occurs in the network cable and sending an alarm message. The fault detection module determines whether a short circuit fault occurs in the network cable by monitoring the voltage and current data in real time. Specifically, when the voltage measurement unit detects an abnormal voltage, the fault detection module triggers the voltage comparison unit. The voltage comparison unit determines whether it is a short circuit fault by comparing the current voltage with the preset normal voltage range. If the current voltage is lower than the lower limit of the preset normal voltage range, the fault detection module generates a fault signal and transmits it to the alarm unit through the data line. The alarm unit selects a suitable alarm mode, such as a light alarm or a sound alarm, according to the type of fault signal, to promptly notify the user of the abnormal state of the network cable or device. It should be understood that this fault detection and alarm mechanism can quickly detect and handle short circuit faults to ensure the safe operation of the system.

[0152] Furthermore, in order to improve the communication efficiency and management convenience of the system, the network cable in this embodiment is equipped with an external communication interface. The external communication interface can use a standard Ethernet interface or USB interface to transmit status reports and real-time data to external devices, such as a monitoring center or a user terminal. Specifically, the communication interface is connected to the voltage detection circuit, the current regulation module, the fault detection module, and the adaptive regulation module through a data line to transmit the data and control signals generated by these modules in real time. It should be understood that the selection of the external communication interface can be flexibly configured according to the needs of the actual application scenario, thereby enhancing the scalability and applicability of the system.

[0153] Furthermore, the network cable in this embodiment is also designed with a variety of connection methods to ensure that the various functional modules can work together effectively. Specifically, the voltage detection circuit is connected to each current limiting resistor and each capacitor through a data line to monitor the voltage and current on the network cable in real time. The current regulation module, the fault detection module and the adaptive regulation module are connected to each current limiting resistor and capacitor through a control line to achieve current regulation and fault detection functions. The design of this connection method ensures data transmission and control signal transmission between various functional modules, and improves the overall performance and reliability of the system.

[0154] Furthermore, in order to improve the mechanical strength and service life of the network cable, the network cable in this embodiment adopts high-quality cable materials and structural design. Specifically, the network cable adopts a shielding layer on the outside and a high-purity copper wire on the internal core to ensure the stability and anti-interference ability of signal transmission. At the same time, crystal plugs are crimped at both ends of the network cable to connect the power supply device and the powered device. The design of the crystal plug ensures the stability and reliability of the network cable connection. It should be understood that the use of high-quality materials and structural design enables the network cable to maintain good performance during long-term use.

[0155] Through this embodiment, users can achieve stable current operation of powered devices under different working conditions, and take prompt measures in case of voltage anomalies and short circuit faults to ensure safe startup and stable operation of powered devices. This embodiment provides comprehensive monitoring, regulation and protection functions by integrating a PD power-on surge current suppression cable design with multiple functional modules.

[0156] The above embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for suppressing power-on surge current of a PD, characterized in that: The steps of the method include: Provide a standard 8-core network cable; A group of electronic components are installed on one side of the network cable close to the power supply device, wherein the electronic components include multiple current limiting resistors and capacitors; A capacitor is connected in series between the two wire cores of each wire pair to absorb the instantaneous impact current when power is turned on; Connect one current-limiting resistor to each wire core to limit the output current on the network cable and provide a maintenance access point; The voltage on the network line is monitored in real time through the voltage detection circuit to calculate the current value and detect the device status; When voltage abnormality is detected, the current on the core is automatically adjusted through the synergistic effect of the current limiting resistor and the capacitor to ensure safe startup of the powered equipment; Crimp ordinary crystal plugs at both ends of the network cable to connect the power supply device and the powered device.

2. The method for suppressing PD power-on surge current according to claim 1, characterized in that: The capacitance of the capacitors is 10 μF. One capacitor is connected in series between the two wire cores of each wire pair, and the multiple capacitors between each wire pair are not connected to each other.

3. The method for suppressing PD power-on surge current according to claim 1, characterized in that: The resistance of the current-limiting resistor is 20Ω, and each of the wire cores is connected with a current-limiting resistor, and the current-limiting resistors are not connected to each other.

4. The method for suppressing PD power-on surge current according to claim 1, characterized in that: The voltage detection circuit includes a voltage measuring unit and a current measuring unit, which are used to monitor the voltage and current on the network cable in real time.

5. The method for suppressing PD power-on surge current according to claim 1, characterized in that: The voltage detection circuit also includes a data analysis unit, which calculates the current value by the following expression: Among them, I is the current current value, V is the output voltage of the power supply equipment, V PD is the input voltage of the powered device, R 总 It is the total resistance of all current-limiting resistors in the network cable.

6. The method for suppressing PD power-on surge current according to claim 1, characterized in that: The synergistic effect of the current limiting resistor and the capacitor is achieved through the following algorithm: When a voltage abnormality is detected, the voltage detection circuit generates a control signal; The control signal triggers a current regulation module, which calculates the regulated current using the following expression: Among them, I 调节 is the adjusted current value, I 初始 is the initial current value, V 异常 is the detected abnormal voltage, V 正常 is the normal voltage value; The current regulating module adjusts the resistance value of the current limiting resistor according to the calculation result to ensure the safe startup of the powered device.

7. The method for suppressing PD power-on surge current according to claim 1, characterized in that: The electronic component also includes an adaptive adjustment module, which realizes real-time adaptive adjustment of current through the following algorithm: The adaptive adjustment module calculates the resistance value of the new current limiting resistor according to the voltage and current values ​​detected in real time by the following expression: Among them, R 新 is the resistance value of the new current limiting resistor, R 初始 is the initial resistance value, I 实时 is the real-time current value, I 目标 is the target current value; The adaptive adjustment module adjusts the current on each line pair according to the resistance value of the new current limiting resistor to ensure stable operation of the powered device.

8. The method for suppressing PD power-on surge current according to claim 1, characterized in that: The electronic component also includes a fault detection module, which detects whether a short circuit fault occurs in the network cable by using the following algorithm: When a voltage anomaly is detected, the fault detection module triggers a voltage comparison unit, which compares the current voltage with a preset normal voltage range; If the current voltage is lower than the lower limit of the preset normal voltage range, the fault detection module generates a fault signal; The fault signal triggers an alarm unit for sending an alarm message to a user.

9. A PD power-on surge current suppression device, characterized in that: The device comprises: A standard 8-core network cable, which is divided into 4 pairs; A 10μF capacitor is connected in series between the two wire cores of each wire pair to absorb the instantaneous impact current when power is turned on; A 20Ω current limiting resistor is connected to each of the wire cores to limit the output current of the network cable and provide a maintenance access point; A voltage detection circuit, comprising a voltage measurement unit, a current measurement unit and a data analysis unit, for real-time monitoring of the voltage and current on the network cable; a current regulating module, which adjusts the resistance value of the current limiting resistor according to the control signal of the voltage detection circuit to ensure the safe startup of the powered device; A fault detection module, used to detect whether the network cable has a short circuit fault and send an alarm message; An adaptive adjustment module dynamically adjusts the resistance of the current limiting resistor according to the voltage and current values ​​detected in real time to ensure stable operation of the powered device; Both ends of the network cable are crimped with crystal plugs for connecting the power supply device and the powered device.

10. A PD power-on surge current suppression network cable, characterized in that: The network cable includes the PD power-on surge current suppression device as claimed in claim 9, and the connection method of the 20Ω current limiting resistor connected to each wire core and the 10μF capacitor of each wire pair is as follows: A 10μF capacitor is connected in series between the two wire cores of each wire pair, and the capacitors of each pair of wires are not connected to each other; Connect a 20Ω fixed resistor to each of the two wire cores of each wire pair, and the resistors between different wire pairs are not connected to each other; The voltage detection circuit is connected to each current limiting resistor and each capacitor through the data line to monitor the voltage and current on the network line in real time; The current regulation module, the fault detection module and the adaptive regulation module are connected to each of the current limiting resistors and each of the capacitors through control lines to achieve current regulation and fault detection functions; Both ends of the network cable are crimped with crystal plugs for connecting the power supply device and the powered device.

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