CN109981298B - Industrial switch POE power management method and management system - Google Patents
Industrial switch POE power management method and management system Download PDFInfo
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Abstract
The invention discloses a POE power management method for an industrial switch, wherein the industrial switch comprises a plurality of POE ports, and the method comprises the following steps: configuring power supply priorities of the POE ports; acquiring the residual power of the industrial switch; accessing a certain PD load through a certain POE port to obtain the power of the PD load; and comparing the residual power with the power of the PD load, and supplying or not supplying power to the PD load. According to the industrial switch POE power management method, the actual application environment and the power supply power management of the industrial switch are combined for the first time, the supportable maximum power of the POE port is adjusted in real time according to actual application conditions (input voltage and operating temperature), the power supply of the key port is guaranteed by combining the priority configuration of the POE port, and the intelligentization, rationalization and maximization of the POE power utilization are realized. The invention also provides a POE power management system of the industrial switch.
Description
Technical Field
The invention relates to the technical field of POE power supply, in particular to a POE power management method and a POE power management system for an industrial switch.
Background
At present, the application of POE power supply is very wide, and an optimization scheme for POE power supply also appears endlessly, for example, a technical scheme disclosed in a patent application with an application number of cn201410116303.x is as follows: under the condition of a certain total power, calculating the current power supply power to obtain the residual power, when a device for supplying power is newly added, if the residual power is not exceeded, normally supplying power, if the residual power is exceeded, performing arbitration, and performing power supply and power failure operation according to a preset priority, wherein the scheme mainly adopts a low-cost POE scheme, and under the condition of a rated total power, the utilization rate of the power is improved; the technical scheme disclosed in the patent application with the application number of CN201711225456.8 is to more reasonably distribute the power of a power supply device based on the condition that the power supply power of the power supply device is not changed, so that as many power receiving devices as possible work normally; the technical scheme disclosed in the patent application with the application number of CN201210415075.7 is to cut off the power supply and the path between the power supply control module and the device power supply when the POE is not powered, and to switch on the power supply and the path between the power supply control module and the device power supply when the POE is powered, so as to reduce the circuit loss and prolong the service life of the power supply; the technical scheme disclosed in patent application No. CN201310350253.7 is to detect the in-place situation of the power supply by using a CPLD, and then notify the CPU, and the CPU notifies a POE module according to the in-place situation of the power supply, and supplies power according to the power situation of the corresponding power supply.
In addition, in the field of commercial switches, power management of POE ports is performed based on the fact that power available to devices is fixed, power supply management of POE ports is performed, for example, high-end devices may have priority management, while simple devices only calculate residual power, and supply power if the residual power is greater than the power of ports requiring power supply, otherwise, power is off, and port priority management is not performed.
In the field of industrial switches, power management strategies of POE ports are less, and because industrial switches are basically designed without fans and naturally radiate heat, the power design of the whole machine is not high, so that each manufacturer basically specifies the maximum supporting power of a single port and the maximum power which can be supported by the whole machine, and the maximum supporting power and the maximum power serve as the limitation of equipment application. On the premise of ensuring the operational reliability of the industrial switch, how to maximize the increase of the POE power supply power is a difficult problem in the industry.
Due to the fact that the industrial switch is poor in application occasions and difficult in power improvement, the importance of power application optimization is highlighted. In the prior art, a method for managing and optimizing the POE power supply power of the industrial switch according to the actual application conditions (such as different input voltages, different application environment temperatures, and the like) of the industrial switch has not been developed, and the intelligent, maximized and rationalized POE power of the industrial switch cannot be realized.
Disclosure of Invention
In view of this, the present invention provides a POE power management method and a POE power management system for an industrial switch, so as to solve the problem that the POE power supply power cannot be optimized according to the actual application condition of the industrial switch in the prior art.
The invention adopts a technical scheme that: the utility model provides an industrial switch POE power management method for industrial switch POE power supply optimization, industrial switch POE includes a plurality of POE ports, the method includes:
configuring power supply priorities of the POE ports;
accessing a certain PD load through a certain POE port to obtain the power of the PD load;
obtaining the maximum supporting power and the used power of the industrial switch, and calculating to obtain the residual power of the industrial switch;
comparing the residual power with the power of the PD load, and supplying power to the PD load when the residual power is greater than the power of the PD load; and when the residual power is less than the power of the PD load, supplying or not supplying power to the PD load according to the configured POE port power supply priority.
As an improvement to the above solution, configuring the power supply priority of the plurality of POE ports includes:
numbering the POE ports respectively to enable each POE port to correspond to one port number;
respectively setting power supply priorities for the plurality of POE ports to enable each POE port to correspond to one power supply priority;
and establishing association between the port number and the power supply priority for each POE port and storing the association.
As an improvement to the above solution, obtaining the maximum supported power of the industrial switch comprises:
establishing and storing the correlation between the maximum supporting power of the industrial exchanger and the input voltage and the operating temperature of the industrial exchanger;
acquiring an input voltage of the industrial switch;
acquiring the operating temperature of the industrial exchanger;
and acquiring the maximum support power of the industrial exchanger according to the input voltage and the operating temperature.
As an improvement to the above, obtaining the used power of the industrial exchange comprises:
respectively acquiring port voltage and port current of each POE port which has supplied power, and calculating to obtain the current power of each POE port which has supplied power;
and calculating the sum of the current power of each POE port to obtain the used power of the industrial switch.
As an improvement to the above solution, the powering or not powering the PD load according to the configured POE port power priority includes:
acquiring the power supply priority of a POE port which has supplied power;
acquiring the power supply priority of a POE port accessed to the PD load;
comparing the power supply priority of the POE port accessed to the PD load with the power supply priority of the POE port already supplied with power, and if the power supply priority of the POE port accessed to the PD load is lower than the power supply priority of the POE port already supplied with power, not supplying power to the PD load;
and if the power supply priority of the POE port connected with the PD load is higher than that of the POE port already supplied with power, the POE port already supplied with power is powered off, and the PD load is supplied with power.
The invention adopts another technical scheme that: provides a POE power management system of an industrial switch, which is used for optimizing the POE power supply power of the industrial switch, the industrial switch comprises a plurality of POE ports, the system comprises a power supply module, a power supply control module and a power optimization module, wherein,
a power supply module: the power optimization module, the power supply control module and the POE ports are powered;
a power supply control module: the power control device is used for acquiring the current voltage and current of a power supply port of the industrial switch, and acquiring the power of a PD load when the PD load is accessed through a POE port;
a power optimization module: the power supply control module is used for configuring power supply priorities of the POE ports, acquiring the maximum support power of the industrial switch, calculating the used power and the residual power of the industrial switch, comparing the residual power with the power of the PD load and enabling the power supply control module to supply power or not supply power to the PD load according to the comparison result;
when the residual power is larger than the power of the PD load, supplying power to the PD load; and when the residual power is less than the power of the PD load, supplying or not supplying power to the PD load according to the configured POE port power supply priority.
As an improvement to the above scheme, the power module includes an input power pack and a POE power source that are sequentially connected;
the power supply control module comprises a POE controller, and the POE controller is in signal connection with the POE ports;
the POE power supply is connected with the POE controller;
the power optimization module comprises an MCU (microprogrammed control unit), the MCU is in signal connection with the POE controller, the power supply priority of the POE ports can be configured by the MCU, the maximum supporting power, the used power and the residual power of the industrial switch can be acquired, and a control instruction is sent to control the on-off of the power supply of each POE port.
As an improvement to the above scheme, the power optimization module further includes a first voltage detection device and a temperature detection device, and the first voltage detection device and the temperature detection device are in signal connection with the MCU;
the first voltage detection device is used for detecting the input voltage of the industrial switch and feeding back a detection result to the MCU;
the temperature detection device is used for detecting the operating temperature of the industrial switch and feeding back a detection result to the MCU;
the MCU is stored with corresponding different input voltage and operation temperature and corresponding maximum support power of the industrial switch, and the MCU inquires and obtains the corresponding maximum support power according to the received input voltage and operation temperature.
As an improvement to the above scheme, a detection resistor is connected between the POE power supply and the POE controller, a second voltage detection device is connected to both ends of the detection resistor, and the second voltage detection device is in signal connection with the MCU;
the second voltage detection device detects the voltages at two ends of the detection resistor and feeds back a detection result to the MCU, the MCU calculates a current value passing through the detection resistor according to the resistance value of the detection resistor and the received voltage value, and calculates and obtains the used power of the industrial switch according to the current value and the voltage value.
As an improvement to the above scheme, the power supply control module further includes a power supply detection circuit, and the power supply detection circuit is in signal connection with the POE controller, the MCU, and the plurality of POE ports;
the power supply detection circuit detects the voltage value of each POE port and feeds back the detection result to the MCU, the POE controller acquires the current value of each POE port and feeds back the current value to the MCU, and the MCU calculates the used power of the industrial switch according to the current value and the voltage value; the power supply detection circuit can be used for switching on or switching off the power supply of each POE port according to the control instruction of the MCU.
According to the industrial switch POE power management method and the management system, the actual application environment and the power supply power management of the industrial switch are combined for the first time, the supportable maximum power of the POE port is adjusted in real time according to the actual application conditions (input voltage and operating temperature), the POE use power and the residual power are calculated, then the power supply of the key port is ensured according to the preset priority configuration by combining the POE port priority configuration, the POE power management is refined to the maximum extent, and the intelligentization, rationalization and maximization of the POE power utilization are realized.
Drawings
Fig. 1 is a flowchart of a POE power management method for an industrial switch according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a POE power management system of an industrial switch in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a POE power management system of an industrial switch in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a POE power management system of an industrial switch in another embodiment in the embodiment of the present invention;
fig. 5 is a schematic diagram of the power supply detection circuit in fig. 4.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application.
After the industrial switch is designed, hardware of the industrial switch is fixed, and under the condition that the total power of the industrial switch is constant, the main factor influencing the actual support power of the industrial switch is the temperature rise of internal devices of the switch, and the maximum temperature of the internal devices cannot exceed the upper limit temperature of the switch design. The temperature rise of the internal devices is influenced by two factors, namely, the input voltage is low, when the input direct-current voltage of the switch is low, the input current is large, the loss of the internal devices is increased, and the temperature rise is more; and secondly, the higher the operation temperature is, the more the temperature of the internal devices of the switch rises. Therefore, on the premise of ensuring the stable operation of the industrial switch, the maximum support power of the practical application of the industrial switch can be influenced by different input voltages and different operation temperatures.
The effect of input voltage and operating temperature on the power supply of an industrial switch is described below by way of example: the design indexes of the industrial switch are as follows: the input voltage is 43Vdc-160Vdc, the operating temperature range is-40 deg.C-75 deg.C, and the available power is 120W.
When the voltage 43Vdc is input into the industrial exchanger, the loss of internal devices is large, the temperature rises, at the moment, if the input current is reduced, the loss can be reduced, the temperature rise of the internal devices is reduced, and the POE power supply power needs to be reduced; when the voltage 160Vdc is input into the equipment, the loss of internal devices is small, the temperature rise is low, the input current can be increased, and the POE power supply power is increased.
When the industrial exchanger is applied to the environment of minus 40 ℃, the temperature of internal devices is lower, the POE power supply is increased, the temperature of the internal devices is raised, the operation reliability of the exchanger is not affected, and the POE power supply can be increased; when the industrial switch is applied to a 75 ℃ environment, the temperature of internal devices is high, and the POE power supply is required to be reduced so that the whole switch can stably operate.
The available power 120W in the design index generally refers to the maximum supported power of the industrial switch when the industrial switch operates in the worst environment, namely the maximum supported power when the input voltage is 43Vdc and the operating temperature is 75 ℃, so that the available power indicated by the industrial switch index is 120W finally. The inventor of the present application actually tests the temperature rise of the internal device of the industrial switch by changing different application conditions (common input voltage and operating temperature), and determines the maximum supported power of the industrial switch under different application conditions (input voltage and operating temperature) on the premise that the temperature rise of the internal device of the switch does not exceed a predetermined range as shown in table 1 below:
maximum support power of input voltage operation temperature 43Vdc75 ℃, 120W72Vdc75 ℃, 125W110Vdc75 ℃, 130W160Vdc75 ℃, 135W43Vdc-40 ℃, 170W72Vdc-40 ℃, 180W110Vdc-40 ℃, 190W160Vdc-40 ℃, 200W
TABLE 1
Therefore, the maximum supported power of the industrial switch can vary with different practical application conditions, and in the past design, the worst application conditions (the lowest available input voltage and the highest operating temperature) of the industrial switch are usually considered, so that the loss of internal devices is reduced to the maximum extent, the temperature rise of the devices is reduced, and the POE power (the available power in the design index) which can be supported by the industrial switch is determined.
Since in practical applications, the industrial switch is rarely used in the worst condition considered by design, when the environment of practical application is improved, the maximum supported power of the industrial switch is definitely larger than the design index in the worst condition. The improvement of a specific application environment has great influence on the POE power support, and the temperature rise of an internal device needs to be actually tested by changing different application conditions in a product design stage, and then the maximum support power of the industrial switch under different application conditions (different common input voltages and different common operating temperatures) is determined.
The invention provides a POE power management method and a POE power management system for an industrial switch, which combine the practical application condition of the industrial switch with the POE power supply power management for the first time, adjust the output power of the industrial switch in real time on the premise of ensuring that the temperature rise of devices in the switch does not exceed a preset range according to the practical application condition (input voltage and operating temperature), ensure the power supply of key POE ports according to the power supply priority of each POE port, and realize the maximization, rationalization and intellectualization of the POE power utilization.
Referring to fig. 1, fig. 1 shows a flow of a POE power management method for an industrial switch, in an embodiment of the present invention, where the POE power management method for an industrial switch is used for optimizing POE power supply power of the industrial switch, the industrial switch includes a plurality of POE ports, and the method includes the following steps:
and S101, configuring power supply priorities of the POE ports.
Numbering the POE ports, wherein the POE ports are respectively numbered as N1 and N2 … … Ni, and each POE port corresponds to one port number N1 and N2 … … Ni;
setting power supply priorities G1 and G2 … … Gi for the plurality of POE ports respectively, so that each POE port corresponds to one power supply priority G1 and G2 … … Gi, and thus the port numbers N1 and N2 … … Ni correspond to the power supply priorities G1 and G2 … … Gi one by one, where the power supply priorities G1 and G2 … … Gi can be set to decrease or increase sequentially, and the POE port with a high priority is used for connecting an external PD load needing preferential power supply, it can be understood that i is equal to the set number of the plurality of POE ports, and in this embodiment, i is greater than or equal to 3;
establishing and storing the association between the port numbers N1 and N2 … … Ni and the power supply priorities G1 and G2 … … Gi for each POE port, so that the port numbers N1 and N2 … … Ni can be associated with the power supply priorities G1 and G2 … … Gi in sequence or in reverse order, in this embodiment, the port numbers N1 and N2 … … Ni are associated with the power supply priorities G1 and G2 … … Gi in sequence, that is, the port number N1 is associated with the power supply priority G1, the port number N2 is associated with the power supply priority G2, and the port number N … … is associated with the power supply priority Gi.
S102, accessing a certain PD load through a certain POE port, and obtaining the power Pk of the PD load.
It can be understood that the certain POE port is one of the unpowered POE ports of the industrial switch, and the power Pk of the certain PD load is obtained by reading the hardware information of the POE port.
S103, obtaining the maximum support power Pm and the used power Pu of the industrial switch, and calculating to obtain the residual power Ps of the industrial switch.
Establishing and storing the association between the maximum support power of the industrial switch and the input voltage and the operating temperature of the industrial switch, and particularly, enabling the maximum support power of the industrial switch under different application conditions (different common input voltages and different common operating temperatures) to correspond to the common input voltage and the common operating temperature and storing the corresponding relation;
acquiring input voltage V of the industrial switch, wherein an input power supply of the industrial switch can be set as a single power supply, a double power supply or multiple power supplies, the power supplies are connected in parallel through a diode or an oring circuit, hot backup power supply is performed, and the input voltage V of the industrial switch can be detected through a voltage detection device;
acquiring an operating temperature T of the industrial switch, wherein in the embodiment, the operating temperature T comprises an outer shell temperature, an internal environment temperature and a key device temperature of the industrial switch, and the outer shell temperature, the internal environment temperature and the key device temperature can be respectively detected by a temperature detection device;
the operating temperature T is a function of the shell temperature, the internal environment temperature and the temperature of the key device, and in this embodiment, the operating temperature T is set as an arithmetic average of the shell temperature, the internal environment temperature and the temperature of the key device; it is understood that in other embodiments, the shell temperature, the internal ambient temperature and the critical device temperature may be respectively set with different weights, and the operating temperature T is an arithmetic average value obtained by multiplying the detected values of the temperatures by the weights thereof, such as 20% for the shell temperature, 35% for the internal ambient temperature and 55% for the critical device temperature;
after the input voltage V and the operation temperature T are obtained, inquiring and obtaining the maximum support power Pm of the industrial switch based on the input voltage V, the operation temperature T and the stored association between the maximum support power of the industrial switch and the input voltage and the operation temperature of the industrial switch;
respectively acquiring port voltages V1 and V2 … … Vj, port currents I1 and I2 … … Ij of each powered POE port, and calculating current powers P1 and P2 … … Pj of each powered POE port, wherein j is more than or equal to 1 and less than I; calculating the sum of the current power P1 and the current power P2 … … Pj of each POE port which is supplied with power, obtaining the used power Pu of the industrial switch, and calculating and obtaining the residual power Ps of the industrial switch, wherein the residual power Ps is the maximum supported power Pm-the used power Pu; it can be understood that when none of the POE ports of the industrial switch is powered, the remaining power Ps is the maximum supported power Pm.
S104, comparing the power Pk of the PD load with the residual power Ps, and supplying power to the PD load when the power Pk of the PD load is smaller than the residual power Ps; and when the power Pk of the PD load is greater than the residual power Ps, supplying power or not supplying power to the PD load according to the configured POE port power supply priority.
Wherein, according to the configured POE port power supply priority, the PD load is powered or not powered by the following steps:
(1) acquiring the power supply priority of the powered POE ports, firstly acquiring the port numbers N1 and N2 … … Nj of the powered POE ports, and inquiring and acquiring the power supply priority G1 and G2 … … Gj of the powered POE ports based on the port numbers N1 and N2 … … Nj and the stored associations between the port numbers N1 and N2 … … Ni and the power supply priority G1 and G2 … … Gi. It is understood that j < i is greater than or equal to 1, and the powered POE ports are set to at least one.
(2) Acquiring the power supply priority of a POE port accessed to the PD load, and first acquiring a port number Nk of the POE port, where it can be understood that the POE port is an unpowered port of the industrial switch, and Nk is one of N1 and N2 … … Ni; inquiring and acquiring the power supply priority Gk of the POE port based on the port number Nk and the stored association between the port numbers N1, N2 … … Ni and the power supply priorities G1, G2 … … Gi, wherein Gk is one of G1 and G2 … … Gi as understood.
(3) Comparing the power supply priority Gk of the POE port accessed to the PD load with the power supply priorities G1 and G2 … … Gj of the POE ports already supplied with power, if the power supply priority Gk of the POE port accessed to the PD load is lower than the power supply priorities G1 and G2 … … Gj of the POE ports already supplied with power, namely the power supply priorities G1 and G2 … … Gj of the POE ports already supplied with power are higher than the power supply priority Gk of the POE port accessed to the PD load, and at the moment, the PD load is not supplied with power; if the power supply priority Gk of the POE port accessed to the PD load is higher than the power supply priorities G1 and G2 … … Gh of some or all of the powered POE ports, the powered POE port with the power supply priority lower than the power supply priority Gk is powered off, the powered POE port accessed to the PD load is powered on, and the PD load is powered on, which can be understood that h is greater than or equal to 1 and less than or equal to j.
Correspondingly, the present invention further provides a POE power management system for an industrial switch, which is used for optimizing POE power supply power of the industrial switch, where the industrial switch includes a plurality of POE ports, please refer to fig. 2, and fig. 2 shows a structure of the POE power management system for the industrial switch in an embodiment of the present invention, where the POE power management system for the industrial switch includes a power module 10, a power supply control module 20, and a power optimization module 30.
The power module 10 is configured to supply power to the power supply control module 20, the power optimization module 30, and the plurality of POE ports; the power supply control module 20 is configured to obtain port voltages V1, V2 … … Vj, port currents I1, I2 … … Ij of the power-supplied ports of the industrial switch, access a certain PD load through a certain POE port, and obtain power Pk of the PD load; the power optimization module 30 is configured to configure power supply priorities G1 and G2 … … Gi of the POE ports, obtain a maximum supported power Pm of the industrial switch, calculate a used power Pu and a remaining power Ps of the industrial switch, compare the remaining power Ps with a power Pk of the PD load, and enable the power supply control module 20 to supply or not supply power to the PD load according to a comparison result.
Specifically, when the residual power Ps is greater than the power Pk of the PD load, the PD load is powered; and when the residual power Ps is less than the power Pk of the PD load, supplying or not supplying power to the PD load according to the configured POE port power supply priorities G1 and G2 … … Gi.
Further, power module 10 is including the input power supply package and the POE power that connect gradually, and in this embodiment, power module 10 is right power optimization module 20, power supply control module 30 and through the PD load that the POE port is connected carries out the hot backup power supply, input power supply package includes carries out parallelly connected input power 1 and input power 2 through the diode.
The power supply control module 20 includes the POE controller, POE controller signal connection a plurality of POE ports, the POE power is connected the POE controller, and the POE power supply is connected to each POE port through the POE controller, and in this embodiment, the POE port is RJ45 or M12, can adopt the data line to supply power to outside PD load.
Further, the power supply control module 20 further includes a CPU, a MAC (forwarding processing module), a PHY (physical layer adapter) and a network transformer, which are connected between the POE controller and the plurality of POE ports by signals. The CPU is used as a central processing unit and used for carrying out POE power supply control on an external PD load, and the CPU is connected with a POE controller and an MAC; the MAC is mainly responsible for forwarding and processing data information in the function of the industrial switch; the PHY is mainly responsible for sending and receiving physical signals of data information in the industrial switch; the network transformer can couple and isolate a power supply and a data path, wherein the data path is formed by a CPU, a MAC and a PHY inside the industrial switch.
Port voltages V1, V2 … … Vj, port currents I1 and I2 … … Ij of the POE ports which are supplied with power are respectively obtained through the data paths, and the port voltages V1, V2 … … Vj, the port currents I1 and I2 … … Ij are transmitted to the power optimization module 30, wherein j is larger than or equal to 1 and smaller than I.
In addition, the data path obtains the power Pk of a certain PD load by reading the hardware information of the POE port accessing the certain PD load, and transmits the power Pk to the power optimization module 30.
The data path transmits the port voltages V1, V2 … … Vj, port currents I1, I2 … … Ij obtained by the data path and the power Pk of the certain PD load to the POE controller, and further to the power optimization module 30.
The power optimization module 30 includes an MCU, and serves as a policy core of the industrial switch POE power management system, the MCU is connected to the POE controller through a signal, and the POE controller transmits the received port voltages V1, V2 … … Vj, port currents I1, I2 … … Ij, and the power Pk of the certain PD load to the MCU.
The MCU can calculate the current power P1 and P2 … … Pj of each power-supplied POE port and calculate the sum of the current power P1 and P2 … … Pj of each power-supplied POE port to obtain the used power Pu of the industrial switch through the received port voltages V1 and V2 … … Vj and the port currents I1 and I2 … … Ij.
The maximum support power Pm of the industrial switch can be obtained through the MCU, the residual power Ps is calculated, the residual power Ps and the power Pk of the certain PD load are compared, a control instruction is sent to the POE controller according to the comparison result, and then the power supply of each POE port is controlled to be switched on and off, so that the power supply control module 20 supplies power or does not supply power to the certain accessed PD load. The obtaining of the maximum supported power Pm of the industrial switch, the calculating of the remaining power Ps, and the comparing of the remaining power Ps and the power Pk of the certain PD load have been described in detail above, and thus, details are not described herein again.
The power supply priorities G1 and G2 … … Gi of the POE ports can be configured, obtained and compared through the MCU, when the residual power Ps is smaller than the power Pk of a certain PD load, the MCU sends a control instruction to the POE controller to supply power to the PD load; when the residual power Ps is smaller than the power Pk of the certain PD load, the MCU may send a control command to the POE controller according to a comparison result between the power supply priority G1, G2 … … Gj of each powered POE port and the power supply priority Gk of the POE port connected to the certain PD load, so as to control the power supply of each POE port to be turned on or off, and supply or not supply power to the PD load. The configuration, the obtaining, and the comparison of the power supply priorities G1 and G2 … … Gi of the POE ports, and the power supply or the power non-power supply to the PD load according to the comparison result between the power supply priorities G1 and G2 … … Gj of the powered POE ports and the power supply priority Gk of the POE port accessing to the certain PD load have been described in detail above, and therefore, the description is omitted here. In addition, the configuration of the power supply priorities G1, G2 … … Gi of the plurality of POE ports may be configured online through software.
Further, the power optimization module 30 further includes a first voltage detection device and a temperature detection device, and the first voltage detection device and the temperature detection device are in signal connection with the MCU. The first voltage detection device is used for detecting the input voltage V of the industrial switch and feeding back a detection result to the MCU; the temperature detection device is used for detecting the operating temperature T of the industrial switch and feeding back a detection result to the MCU.
The MCU is stored with corresponding different input voltages and operating temperatures and corresponding maximum support power of the industrial switch, and the MCU queries and acquires corresponding maximum support power Pm according to the received input voltage V and operating temperature T.
In this embodiment, the operating temperature T includes a housing temperature of the industrial switch, an internal environment temperature, and a temperature of a key device, the first voltage detection device includes two voltage detection devices for correspondingly detecting the input power supply 1 and the input power supply 2, and the temperature detection device includes three temperature detection devices for correspondingly detecting the housing temperature, the internal environment temperature, and the temperature of the key device. The relationship between the operating temperature T and the housing temperature, the internal environment temperature, and the temperature of the key device has been described in detail above, and thus is not described herein again.
Referring to fig. 3, fig. 3 shows a structure of the power management system of an industrial switch in an embodiment of the present invention, which is directed to a situation that a part of industrial switches do not support collecting voltage and current data of each POE port through a POE controller and the data path, and cannot obtain a used power Pu.
In this embodiment, be connected with a detection resistance Rs between POE power and the POE controller second voltage detection device is connected at detection resistance Rs's both ends, second voltage detection device signal connection MCU.
The second voltage detection device detects the voltages at two ends of the detection resistor Rs and feeds back a detection result to the MCU, the MCU calculates a current value passing through the detection resistor Rs according to the resistance value of the detection resistor Rs and the received voltage value, and calculates and obtains the used power Pu of the industrial switch according to the current value and the voltage value.
Referring to fig. 4, fig. 4 shows a structure of the power management system of an industrial switch in another embodiment of the present invention, which is directed to a situation that a part of industrial switches do not support the collection of voltage data of each POE port through a POE controller and the data path, cannot acquire an already used power Pu, and cannot automatically control a POE port to supply or cut off power.
In this embodiment, the power supply control module 20 further includes a power supply detection circuit, where the power supply detection circuit is connected to the POE controller, the MCU and the POE ports by signals.
The power supply detection circuit detects the voltage value of each POE port and feeds back the detection result to the MCU, the POE controller acquires the current value of each POE port and feeds back the current value to the MCU, and the MCU calculates the used power Pu of the industrial switch according to the current value and the voltage value; the power supply detection circuit can be used for switching on or switching off the power supply of each POE port according to the control instruction of the MCU.
Please refer to fig. 5 in combination, fig. 5 shows a structure of the power supply detection circuit in this embodiment, the power supply detection circuit includes a plurality of third voltage detection devices and a power supply switch, each POE port is correspondingly connected to one third voltage detection device and one power supply switch, the third voltage detection device is connected between the input terminal of the MCU and the POE port, and the power supply switch is connected between the output terminal of the MCU and the POE port.
The third voltage detection device is used for detecting port voltages V1 and V2 … … Vj of each powered POE port and directly feeding back a detection result to the MCU, the MCU calculates current powers P1 and P2 … … Pj of each powered POE port according to the received port voltages V1 and V2 … … Vj and by combining port currents I1 and I2 … … Ij of each powered port fed back by the POE controller, and calculates the sum of the current powers P1 and P2 … … Pj of each powered POE port to obtain the used power Pu of the industrial switch.
The MCU can send a control instruction to enable the power supply switch to be switched on or switched off so as to switch on and switch off the power supply of the corresponding POE port. Specifically, the MCU sends a control command to turn on or off the power switch of the corresponding POE port to turn on or off the power supply thereof according to a comparison result between the remaining power Ps and the power Pk of the certain PD load and a comparison result between the power supply priorities G1, G2 … … Gj of the POE ports that have supplied power and the power supply priority Gk of the POE port that has accessed the certain PD load.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A POE power management method for industrial switch is used for optimizing POE power supply power of the industrial switch, the industrial switch comprises a plurality of POE ports, and the method is characterized by comprising the following steps:
configuring power supply priorities of the POE ports;
accessing a certain PD load through a certain POE port to obtain the power of the PD load;
obtaining the maximum supporting power and the used power of the industrial switch, and calculating to obtain the residual power of the industrial switch;
comparing the residual power with the power of the PD load, and supplying power to the PD load when the residual power is greater than the power of the PD load; when the residual power is smaller than the power of the PD load, supplying power or not supplying power to the PD load according to the configured power supply priority of the POE port;
configuring power priorities of the plurality of POE ports comprises:
numbering the POE ports respectively to enable each POE port to correspond to one port number;
respectively setting power supply priorities for the plurality of POE ports to enable each POE port to correspond to one power supply priority;
establishing association between a port number and power supply priority for each POE port and storing the association;
obtaining the maximum supported power of the industrial switch comprises:
establishing and storing the correlation between the maximum supporting power of the industrial exchanger and the input voltage and the operating temperature of the industrial exchanger;
acquiring an input voltage of the industrial switch;
acquiring the operating temperature of the industrial exchanger;
acquiring the maximum supporting power of the industrial switch according to the input voltage and the operating temperature;
obtaining used power of an industrial switch includes:
respectively acquiring port voltage and port current of each POE port which has supplied power, and calculating to obtain the current power of each POE port which has supplied power;
and calculating the sum of the current power of each POE port to obtain the used power of the industrial switch.
2. The industrial switch POE power management method of claim 1, wherein the powering or not powering the PD load according to the configured POE port powering priority comprises:
acquiring the power supply priority of a POE port which has supplied power;
acquiring the power supply priority of a POE port accessed to the PD load;
comparing the power supply priority of the POE port accessed to the PD load with the power supply priority of the POE port already supplied with power, and if the power supply priority of the POE port accessed to the PD load is lower than the power supply priority of the POE port already supplied with power, not supplying power to the PD load;
and if the power supply priority of the POE port connected with the PD load is higher than that of the POE port already supplied with power, the POE port already supplied with power is powered off, and the PD load is supplied with power.
3. A POE power management system of an industrial switch is used for optimizing POE power supply power of the industrial switch, the industrial switch comprises a plurality of POE ports, the POE power management system is characterized by comprising a power supply module, a power supply control module and a power optimization module, wherein,
a power supply module: the power optimization module, the power supply control module and the POE ports are powered;
a power supply control module: the power control device is used for acquiring the current voltage and current of a power supply port of the industrial switch, and acquiring the power of a PD load when the PD load is accessed through a POE port;
a power optimization module: the power supply control module is used for configuring power supply priorities of the POE ports, acquiring the maximum support power of the industrial switch, calculating the used power and the residual power of the industrial switch, comparing the residual power with the power of the PD load and enabling the power supply control module to supply power or not supply power to the PD load according to the comparison result;
when the residual power is larger than the power of the PD load, supplying power to the PD load; when the residual power is smaller than the power of the PD load, supplying power or not supplying power to the PD load according to the configured power supply priority of the POE port;
the power supply module comprises an input power supply set and a POE power supply which are sequentially connected;
the power supply control module comprises a POE controller, and the POE controller is in signal connection with the POE ports;
the POE power supply is connected with the POE controller;
the power optimization module comprises an MCU (microprogrammed control unit), the MCU is in signal connection with the POE controller, and the MCU can be used for configuring power supply priorities of the POE ports, acquiring the maximum supporting power, the used power and the residual power of the industrial switch and sending a control instruction to control the on-off of power supply of each POE port;
the power optimization module further comprises a first voltage detection device and a temperature detection device, and the first voltage detection device and the temperature detection device are in signal connection with the MCU;
the first voltage detection device is used for detecting the input voltage of the industrial switch and feeding back a detection result to the MCU;
the temperature detection device is used for detecting the operating temperature of the industrial switch and feeding back a detection result to the MCU;
the MCU is stored with corresponding different input voltage and operation temperature and corresponding maximum support power of the industrial switch, and the MCU inquires and obtains the corresponding maximum support power according to the received input voltage and operation temperature.
4. The industrial switch POE power management system of claim 3, wherein a detection resistor is connected between the POE power supply and the POE controller, a second voltage detection device is connected to two ends of the detection resistor, and the second voltage detection device is in signal connection with the MCU;
the second voltage detection device detects the voltages at two ends of the detection resistor and feeds back a detection result to the MCU, the MCU calculates a current value passing through the detection resistor according to the resistance value of the detection resistor and the received voltage value, and calculates and obtains the used power of the industrial switch according to the current value and the voltage value.
5. The industrial switch POE power management system of claim 3, wherein the power supply control module further comprises a power supply detection circuit in signal connection with the POE controller, the MCU and the POE ports;
the power supply detection circuit detects the voltage value of each POE port and feeds back the detection result to the MCU, the POE controller acquires the current value of each POE port and feeds back the current value to the MCU, and the MCU calculates the used power of the industrial switch according to the current value and the voltage value; the power supply detection circuit can be used for switching on or switching off the power supply of each POE port according to the control instruction of the MCU.
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| CN114342323A (en) * | 2019-08-29 | 2022-04-12 | 昕诺飞控股有限公司 | Control network system for power distribution |
| CN112615724B (en) * | 2020-11-03 | 2022-08-02 | 深圳凌特华盛科技有限公司 | POE load priority power supply management system |
| CN112769169A (en) * | 2020-12-28 | 2021-05-07 | 金卡智能集团股份有限公司 | Circuit power supply management method and system for flowmeter and flowmeter |
| CN113014402B (en) * | 2021-02-22 | 2023-03-24 | 浙江大华技术股份有限公司 | Power management method, main controller and device |
| CN113840512B (en) * | 2021-08-06 | 2023-10-20 | 锐捷网络股份有限公司 | Temperature adjusting method and device, electronic equipment and storage medium |
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