CN102123034B - POE system is utilized to carry out method and the device of high-low pressure selection power supply - Google Patents
POE system is utilized to carry out method and the device of high-low pressure selection power supply Download PDFInfo
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Abstract
The present invention relates to a kind of utilize POE system to carry out method and device that high-low pressure selects power supply, the method comprises: S110, when powered model calling is to the power supply port of power control module, described supply module detects and classification powered module; S120, power control module carry out judging according to the result of described detection and classification and for power module described in described powered model choice a kind of power supply or will not power.Method and apparatus provided by the invention, compatible high voltage supply and low pressure short distance supply power mode, user is allowed to select according to the actual state of oneself: to be that the high pressure (44V-57V or 50V-57V) that employing standard specifies is powered, still low pressure (as 12V) short distance (as below 5m) is adopted directly to power, to reduce power supply cost.
Description
Technical field
The present invention relates to data communication technology field, specifically in Power over Ethernet system, utilize POE (Powerover Ethernet Power over Ethernet) system to carry out the device and method of high-low pressure selection power supply.
Background technology
Along with the promulgation of IEEE802.3at (IEEE-USA high-power) standard, Power over Ethernet (POE) technology moves to maturity increasingly, the network equipment with PSE (Power Supply Equipment power supply unit) function can be that the increasing terminal based on IP (the Internet) is (as IP telephone machine, wireless local network connecting point AP, web camera etc.) carry out supply of electric power while transmission of data signals, this also makes with the PD (PowerDevice of POE by Electricity Functional, power receiving equipment or powered module) product fast development gets up.
According to the IEEE802.3at standard that 2009 promulgate, its port of PSE device being responsible for power supply confesses voltage range type1 for (44V-57V), type2 is (50V-57V), and general PD real work voltage is all low-voltage (as below 12V), therefore this just needs PD to increase one-level DC-DC modular converter in the rear class by electric unit, allows PSE be converted to low pressure (12V or 3.3V etc.) for PD work for the high pressure of coming (44V-57V or 50V-57V).Adopting the mode of this high-voltage transmission electric power to be to ensure efficiency of transmission, reducing the power consumption transmitted on the line, thus enabling PD more obtain power; But for the PD of some low-power operation, even if having certain loss in POE supply line, remaining power also enough PD uses, and if directly low pressure is sent, the cost that DC-DC on PD (DC-to-DC) changes can be reduced.But prior art does not provide and directly low pressure can be sent, to reduce the technical scheme of the cost that DC-DC on PD (DC-to-DC) changes, can not compatible high voltage supply and low pressure short distance power.
Summary of the invention
Main purpose of the present invention is to provide a kind of utilize POE system to carry out device and method that high-low pressure selects power supply, to realize the method that compatible high voltage supply and low pressure short distance are powered, user can be selected according to the needs of oneself, reduces power supply cost.
The technical solution adopted for the present invention to solve the technical problems is:
Utilize POE system to carry out a method for high-low pressure selection power supply, it is characterized in that, the method comprises:
S110, when powered model calling is to the power supply port of power control module, described supply module detects powered module;
S120, power control module carry out judging according to the result of described detection and for power module described in described powered model choice a kind of power supply or will not power.
Preferably, described step S120, specifically comprises:
S121 power control module judges according to described testing result, and decision adopts high voltage supply or adopts low pressure short distance to power: if detect, the detection resistance of powered module side is 16K-19K, then perform step S123; If detect, the detection resistance of powered module side is 19K-26.5K, then perform step S122;
S122, power control module carry out classification, upper high voltage supply, disconnection detection and shutoff to described powered module;
S123, power control module carry out classification to powered module, and select corresponding supply power mode according to classification results.
Preferably, in described step S123: select corresponding supply power mode according to classification results, specifically comprise:
When detecting that classification results is the first order, then low pressure short distance is carried out to powered module and power; If classification results is not the first order, then will not power.
The invention provides a kind of device utilizing POE system to carry out high-low pressure selection power supply, it comprises:
Power module, power control module and powered module, described power module connects described power control module, and described power control module connects described powered module, and wherein, described power module, comprises at least two kinds of power supplies;
Described power control module, for detecting and classification described powered module, according to the result of described detection and the classification a kind of power supply wherein that is power module described in described powered model choice or will not power.
Preferably, described power control module and each power supply interface of described power module adopt completely being connected.
Preferably, described powered module is: low pressure short distance power receiving equipment.
Preferably, described power control module, for detecting described powered module, and according to IEEE802.3at/af standard, classification is carried out to described powered module, and select according to described classification results for a kind of power supply of power module described in described powered model choice or will not power according to described testing result.
Implement technical scheme of the present invention, there is following beneficial effect: method and apparatus provided by the invention, compatible high voltage supply and low pressure short distance supply power mode, user is allowed to select according to the actual state of oneself: to be adopt high pressure (44V-57V or 50V-57V) to power, still low pressure (as 12V) short distance (as below 5m) is adopted directly to power, to reduce power supply cost.
Accompanying drawing explanation
The structural representation that Fig. 1 provides for the embodiment of the present invention;
The method flow diagram that Fig. 2 provides for the embodiment of the present invention;
The another flow chart of method that Fig. 3 provides for the embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The embodiment of the present invention provides a kind of device utilizing POE system to carry out high-low pressure selection power supply, and as shown in Figure 3, this device comprises:
Power module 210, power control module 220 and powered module 230, described power module 210 connects described power control module 220, described power control module 220 connects described powered module 230, wherein, described power module 210, comprises at least two kinds of power supplies, as shown in Figure 1, comprise high voltage source 211 and low-tension supply 212, high pressure (44V-57V or 50V-57V) and low pressure (as 12V) two kinds of power supplies are provided.
Described power control module 220, for detecting and classification described powered module 230, the result according to described detection and classification is that described powered module 210 is selected a kind of power supply wherein of described power module 211 or will not power.
Powered module 230 can accept low voltage power supply, and be simultaneously the powered module of low pressure short distance being different from standard to allow PSE can identify powered module, it detects resistance and also needs to meet the demands.That is: described powered module 230 is: do not have 48V to turn the low pressure short distance power receiving equipment of low voltage DC-DC power transfer module or the power receiving equipment for IEEE802.3at/af prescribed by standard, or other low pressure short distance power receiving equipments.
In the present embodiment, power control module 220 first still detects (in other examples according to IEEE802.3at/af standard to powered module 230, also can detect powered module 230 according to other standards), detection can utilize 12/36 line pair, also can utilize 45/78 line pair, the result drawn is identical.Specify (in other standard according to IEEE802.3at/af standard, the resistance range detected below also has difference), resistance is detected at (19K when power control module 220 detects, time 26.5K) in scope, namely think that powered module is legal powered module, can carry out 44V-57V or 50V-57V that standard specifies to power, and powered module 230 needs to be detected resistance controls in (23.7K, 26.3K) scope.Which kind of voltage identifies powered module 230 to allow power control module 220 needs power, also need to increase a Standard resistance range on this basis, to distinguish the powered module of standard and the powered module of low pressure short distance, about settled PSE detects that the detection resistance of powered module 230 is at (16K, time 19K) in scope, then can judge that this powered module 230 is as the powered module of low pressure short distance, and now the powered module of low pressure short distance needs its detection resistance value to be controlled at (17K, 18K), detect more accurately PSE can be allowed to hold.
Power control module 220 carries out classification (in other examples according to IEEE802.3at standard to powered module 230 again, also classification can be carried out according to other standards to powered module 230), according to this IEEE802.3at standard (in other standard, the power bracket of classification below also has difference): when detecting that powered module 230 power demand is less than or equal to 3.84W, be divided into the first order (class 1); When detecting that its power demand is less than or equal to 6.49W and is greater than 3.84W, be divided into the second level (class 2); When detecting that its power demand is less than 13W and is greater than 6.49W, be divided into the third level (class 3); When detecting that the average power that powered module inputs is being less than or equal to 25.5W and is being greater than 13W, be divided into the fourth stage (class 4).Because low-voltage is difficult to transmit higher-wattage, therefore low-voltage short distance transfer scheme is limited to the first order that standard specifies, namely detect that powered module 230 needs low pressure short distance to power by step one, also need to recognize powered module and be assigned to the first order, just can carry out low pressure short distance to power, otherwise will not power, in order to avoid damage is caused to powered module 230.
According to the above results, when detecting that powered module 230 is the powered module of low pressure, and when being assigned to the first order, namely carry out low pressure short distance to power, when carrying out low pressure short distance and powering, in order to powered module 230 power demand can be met, no longer power according to above-mentioned classification results when powering, but need the power supply supply that larger current (as 0.75A) can be provided, and also should as far as possible short (as 5m) in the length of supply line, to ensure the power that still can be supplied to powered module demand after removing line loss.That is, when by after detecting that powered module is the powered module of low pressure, determine whether that can carry out low pressure short distance powers by classification with regard to being only used to again, and not as the normative reference confessing power, and power with the supply power mode that can meet powered module 230 power demand completely; And when detecting that powered module 230 is for after high powered module (i.e. standard P D), can directly power according to IEEE802.3af/at standard.
In other examples, further, described power control module 220 and each power supply interface of described power module 210 adopt completely being connected.Namely 12/36 line to 45/78 line to being all connected, so that what ensure that high voltage supply and low pressure short distance power away is different lines pair, when selecting high voltage supply, a kind of scheme of 12/36 or 45/78 line centering can be selected to power, and when selecting low pressure short distance to transmit, then select the another kind of scheme in two schemes to power.For powered module 230, with standard specify the same, need carry out all fronts to connection.
The embodiment of the present invention also provides a kind of method utilizing POE system to carry out high-low pressure selection power supply, and be applied to the device that above-described embodiment provides, as shown in Figure 1, the method comprising the steps of:
S110, when powered model calling is to the power supply port of power control module, described supply module detects powered module;
S120, power control module carry out judging according to the result of described detection and are a kind of power supply of power module described in described powered model choice.In other examples, more specifically, as shown in Figure 2, described step S120, specifically comprises:
S121 power control module judges according to described testing result, and decision adopts high voltage supply or adopts low pressure short distance to power: if the Rdet=(16K-19K) of powered module side detected, then perform step S123; If powered module side Rdet=(19K-26.5K) detected, then perform step S122;
S122, power control module carry out classification, upper high voltage supply (44V-57V or 50V-57V), disconnection detection and shutoff according to IEEE802.3at/af standard to described powered module;
S123, power control module carry out classification to powered module, select corresponding supply power mode according to classification results.12V voltage is just directly sent from the power supply port of PSE by short distance netting twine (as 5M) by power control module by low-tension supply, deliver to the powered port of the powered module of low pressure short distance, for the powered module of low pressure short distance, if the bus of its operating voltage is 12V, then this 12V power supply directly can be used as on board supply, if its operating voltage bus is the voltage that 5V, 3.3V etc. are lower, a 12V with low cost then can be adopted to turn the DC-DC power source conversion module of low-voltage, be down to required voltage and use.In the case, the powered module of low pressure short distance no longer needs the 48V DC-DC power source modular converter of high cost, greatly reduces the cost of power receiving equipment.
In other examples, further, describedly select corresponding supply power mode according to classification results, specifically comprise:
When detecting that classification results is the first order, then low pressure short distance is carried out to powered module and power; If classification results is not the first order, then will not power.Be the powered module of low pressure short distance for testing result, then the power transfer module not turning low pressure in powered module containing 48V is described; If but second-fourth stage is decided to be in classification, then illustrate and need in powered module, to add 44V-57V or 50V-57V voltage according to IEEE802.3at/af standard, this damages the power receiving equipment not turning low-tension supply modular converter containing 48V possibly, therefore will not power for this situation, to ensure to damage powered module.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. utilize POE system to carry out a method for high-low pressure selection power supply, it is characterized in that, the method comprises:
S110, when powered model calling is to the power supply port of power control module, supply module detects and classification powered module;
S120, power control module carry out judging according to the result of described detection and classification and are a kind of power supply of described powered model choice power module or will not power, and wherein, described power supply comprises high voltage source and low-tension supply.
2. method as claimed in claim 1, it is characterized in that, described step S120, specifically comprises:
S121, power control module judge according to described testing result, and decision adopts high voltage supply or adopts low pressure short distance to power: if detect, the detection resistance of powered module side is 16K-19K, then perform step S123; If detect, the detection resistance of powered module side is 19K-26.5K, then perform step S122;
S122, power control module carry out classification, upper high voltage supply, disconnection detection and shutoff to described powered module;
S123, power control module carry out classification to powered module, and select corresponding supply power mode according to classification results.
3. method as claimed in claim 2, is characterized in that, in described S123: select corresponding supply power mode according to classification results, specifically comprise:
When detecting that classification results is the first order, then low pressure short distance is carried out to powered module and power; If classification results is not the first order, then will not power.
4. utilize POE system to carry out a device for high-low pressure selection power supply, it is characterized in that, comprising:
Power module, power control module and powered module, described power module connects described power control module, and described power control module connects described powered module, wherein, described power module, comprises at least two kinds of power supplies, wherein, described power supply is high voltage source and low-tension supply;
Described power control module, for detecting and classification described powered module, according to the result of described detection and the classification a kind of power supply wherein that is power module described in described powered model choice or will not power.
5. device as claimed in claim 4, is characterized in that, described power control module and each power supply interface of described power module adopt completely being connected.
6. device as claimed in claim 5, it is characterized in that, described powered module is: low pressure short distance power receiving equipment.
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| CN201110047783.5A CN102123034B (en) | 2011-02-28 | 2011-02-28 | POE system is utilized to carry out method and the device of high-low pressure selection power supply |
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| CN201110047783.5A CN102123034B (en) | 2011-02-28 | 2011-02-28 | POE system is utilized to carry out method and the device of high-low pressure selection power supply |
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| CN102123034B true CN102123034B (en) | 2015-08-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103546300B (en) * | 2012-07-16 | 2018-08-03 | 南京中兴新软件有限责任公司 | A kind of Power over Ethernet method and apparatus |
| CN103795550B (en) * | 2012-10-31 | 2017-10-17 | 华为技术有限公司 | Method of supplying power to and device |
| CN104348631B (en) * | 2013-07-26 | 2018-09-18 | 明泰科技股份有限公司 | The selection method of power receiving device, power supply system and operation mode |
| CN104869002A (en) * | 2014-02-20 | 2015-08-26 | 中兴通讯股份有限公司 | Powered method of automatically adjusting power demand grade, and powered device of automatically adjusting power demand grade |
| CN104954145B (en) * | 2014-03-29 | 2020-04-21 | 华为技术有限公司 | Ethernet power supply method, power supply equipment and Ethernet power supply system |
| CN105897432B (en) * | 2015-01-26 | 2019-03-26 | 浙江大华技术股份有限公司 | A kind of Power over Ethernet POE distributor |
| ES2713754T3 (en) | 2015-06-30 | 2019-05-23 | Signify Holding Bv | Device and method of power supply, power reception device |
| CN104994269B (en) * | 2015-07-22 | 2018-10-19 | 杭州海康威视数字技术股份有限公司 | Power supply unit, method for controlling power supply and device for image capture device |
| CN105049216B (en) * | 2015-08-25 | 2018-10-12 | 上海斐讯数据通信技术有限公司 | A kind of Power over Ethernet method and power supply system |
| US10735105B2 (en) * | 2018-05-04 | 2020-08-04 | Cisco Technology, Inc. | High power and data delivery in a communications network with safety and fault protection |
| CN109660364B (en) * | 2019-01-31 | 2020-08-18 | 普联技术有限公司 | Power supply system |
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| CN1950783A (en) * | 2004-05-10 | 2007-04-18 | 袍尔得辛有限公司 | Method for rapid port power reduction |
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