CN102761422B - A kind of power over ethernet electric power system of cascade and Power over Ethernet method thereof - Google Patents
A kind of power over ethernet electric power system of cascade and Power over Ethernet method thereof Download PDFInfo
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Abstract
The invention provides a kind of power over ethernet electric power system and Power over Ethernet method thereof of cascade, method wherein comprises: adopt cascade system that each PD equipment and PSE device are connected to form POE system; Start the POE power module in PSE device, the POE control unit out-put supply power of local terminal is to each Ethernet interface; In power output procedure, PD equipment at different levels receives by Ethernet interface the power that higher level equipment exports, and first utilizes it to be the load supplying of local terminal, then exports remaining power supply power to next stage PD equipment by Ethernet interface.The embodiment of the present invention adopts cascade system to build POE system, realizing under the prerequisite that PSE device powers for the PD equipment of low power consumption of a greater number simultaneously, the power port resource of PSE device can also be saved, simplifying supply line, utilize PSE device to export rationally and effectively.
Description
Technical field
The present invention relates to power over Ethernet field, particularly relate to a kind of power over ethernet electric power system and Power over Ethernet method thereof of cascade.
Background technology
POE (Power on Ethernet, Power over Ethernet) refer to when existing Ethernet category 5 twisted pair wiring architecture does not make any changes, while for some network-termination device transmission of data signals, the technology of direct current supply can also be provided by kind equipment for this reason.POE technology can ensure the normal operation of existing network while guaranteeing existing structureization wiring safety, a complete POE system comprises feeder ear equipment (PSE, Power Sourcing Equipment) and receiving end equipment (PD, Power Device) two parts.PSE device is the equipment of powering for ethernet client equipment, is also the manager of whole POE Power over Ethernet process simultaneously.And PD equipment is the PSE load accepting power supply, and the client device of POE system, as IP phone, network security video camera, and other ethernet devices many such as palmtop PC (PDA) or charger for mobile phone (power output of current PSE device is generally 13W or 25W to the maximum, and the equipment that thus in fact any power is no more than 13W/25W can obtain corresponding electric power from RJ45 socket).
Fig. 1 gives a typical POE system framework, and as shown in Figure 1, a typical POE system comprises: PSE device and multiple PD equipment, PSE device comprises POE power module, main control unit, POE control unit and Ethernet interface further.POE power module sends POE power state signal (as power supply type, output power of power supply information etc.) to POE control unit, concurrent power transmission source power; Main control unit completes the external power setting, state reading etc. to POE control unit by POE supervisory communications passage; POE control unit controls limited Ethernet interface, can externally carry out POE and power; Power receiving equipment has multiple, interconnects respectively by Ethernet cable and an Ethernet interface, to go forward side by side row data communication to obtain electric energy.
Along with the application of the data communications equipment such as router, switch adopting POE technology is more and more extensive, PD equipment also gets more and more, but the limited amount of ethernet port in PSE device, thus, when PSE device is powered to the PD equipment of the low power consumption of a greater number simultaneously, so not only need to take more port resource, and realize complex circuit.
Summary of the invention
The object of the present invention is to provide a kind of power over ethernet electric power system and method for supplying power to thereof of cascade, make PSE device can simultaneously to the supplying power for powered device of multiple low power consumption by cascade system;
Another object of the present invention is to power over ethernet electric power system and method for supplying power to thereof that a kind of cascade is provided, save the ethernet port resource in PSE device, simplify supply line.
The object of the invention is to be achieved through the following technical solutions:
A power over ethernet electric power system for cascade, comprises PSE device and n PD equipment; Described PSE device comprises: POE power module, the first main control unit, a POE control unit and at least one Ethernet interface; Described POE power module, for out-put supply power to a POE control unit; Described first main control unit, is read the external power setting of a POE control unit and state for being completed by POE supervisory communications passage; A described POE control unit, for controlling limited Ethernet interface, being the power limitation that each Ethernet interface is arranged according to main control unit, being configured on each Ethernet interface by the power that POE power module exports and exporting;
Described n PD equipment is connected by cascade system with PSE device; And each PD equipment comprises the 2nd POE control unit, DC/DC converting unit, load and at least two Ethernet interfaces, by Ethernet interface respectively with PSE device/upper level PD equipment and next stage PD equipment connection;
2nd POE control unit, for controlling limited Ethernet interface, power received by local terminal is divided into two parts, be the load supplying of local terminal after DC/DC converting unit conversion process by wherein a part of power, by another part power configuration to each Ethernet interface to export next stage PD equipment to.
Wherein, described PD equipment also comprises: the second main control unit, reads the external power setting of the 2nd POE control unit of local terminal and state for being completed by POE supervisory communications passage.
Wherein, described n PD equipment is connected successively.
Wherein, described PSE device is switch or router.
A Power over Ethernet method for cascade, comprises step:
Adopt cascade system that each PD equipment and PSE device are connected to form POE system;
Start the POE power module in PSE device, the POE control unit out-put supply power of local terminal is to each Ethernet interface;
In power output procedure, PD equipment at different levels receives by Ethernet interface the power that higher level equipment exports, and first utilizes it to be the load supplying of local terminal, then exports remaining power supply power to next stage PD equipment by Ethernet interface.
Wherein, also comprise: before structure POE system, power size needed for the general supply power exported according to PSE device and PD equipment, determining can the PD number of devices of cascade.
Wherein, the general supply watt level of the power size sum needed for all PD equipment≤PSE device output of described cascade.
Wherein, also comprise: in PSE device and each PD equipment end, the restriction output power of power supply of each Ethernet interface of local terminal is set respectively.
Compared with prior art, the embodiment of the present invention has following beneficial effect:
The embodiment of the present invention is improved PD equipment, set up POE control unit, the unnecessary power realized received by its utilization in conjunction with existing Ethernet interface is the function that other equipment carry out Power over Ethernet, and then adopt cascade system to build POE system, realizing under the prerequisite that PSE device powers for the PD equipment of low power consumption of a greater number simultaneously, the power port resource of PSE device can also be saved, simplifying supply line, utilize PSE device to export rationally and effectively.
Accompanying drawing explanation
Fig. 1 is traditional POE electric power system Organization Chart.
Fig. 2 is a kind of POE electric power system Organization Chart that the embodiment of the present invention provides.
Fig. 3 is the another kind of POE electric power system Organization Chart that the embodiment of the present invention provides.
Fig. 4 is the principle assumption diagram of the PD equipment that the embodiment of the present invention provides.
Fig. 5 is the flow chart of the POE method of supplying power to that the embodiment of the present invention provides.
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.
Core concept of the present invention is: for the low power consumption of a greater number PD equipment (power consumption as RC panel is only 3W ~ 4W) while powered demand, consider the reality of the port resource finite sum power output larger (being generally 13W/25W) of PSE device, the present invention adopts cascade system to power, embody rule as shown in Figures 2 and 3, multiple PD devices in series is also connected with an Ethernet interface of PSE device by a PD equipment, PSE device first exports relatively high power to a first PD equipment, by unnecessary power stage extremely connected next PD equipment while first this power of PD equipment utilization is load supplying, thus power for this PD equipment, by that analogy, thus realize PSE device and power for multiple PD equipment by an ethernet port simultaneously, can the quantity of PD equipment of cascade can determine according to the gross output of the power demand of each PD equipment and PSE device.
Shown in composition graphs 2 to Fig. 4, in the present embodiment, POE system comprises a PSE device and multiple PD equipment.The connected mode of PSE device and PD equipment is not limited to shown in Fig. 1 and Fig. 2, can determine, but it is completely the same to realize principle in actual application according to the particular requirement of the ethernet port quantity on PD equipment and user.
PSE device comprises POE power module, POE control unit, main control unit and multiple Ethernet interface.
Wherein, POE power module, for outputting to POE control unit by power.
Main control unit, for completing the external power setting, state reading etc. to POE control unit by POE supervisory communications passage.
POE control unit, for controlling limited Ethernet interface, according to the power limitation that main control unit is the setting of each Ethernet interface, the power that POE power module exports is configured on each Ethernet interface, thus the power of setting is exported to by Ethernet interface on the PD equipment that is connected with this Ethernet interface.
PD equipment comprises main control unit, POE control unit, DC/DC converting unit, load and at least two Ethernet interfaces.
Wherein, an Ethernet interface, is connected with the Ethernet interface of PSE device or other PD equipment, receives the power signal that PSE device/other PD equipment exports, and this power signal is sent to POE control unit.
Main control unit, for completing the external power setting, state reading etc. to POE control unit by POE supervisory communications passage.
POE control unit, for controlling limited Ethernet interface, the power received by Ethernet interface is divided into two parts, be the load supplying in this equipment after DC/DC converting unit conversion process by wherein a part of power, according to the main control unit of local terminal be each Ethernet interface arrange power limitation by another part power configuration on each Ethernet interface, thus export unnecessary power, for other PD equipment are powered.
Refer to shown in Fig. 5, the method for supplying power to of above-mentioned POE system comprises the following steps:
501, power size needed for the general supply power exported according to PSE device and PD equipment, determining can the PD number of devices of cascade.
Particularly, the PD number of devices of cascade will meet following requirement:
The general supply watt level that power size sum needed for all PD equipment≤PSE device exports.
502, according to present case, adopt cascade system that each PD equipment and PSE device are connected to form POE system.
In framework process, be connected with an Ethernet interface of PSE device after each PD equipment can being connected as shown in Figure 2 successively, also connected mode as shown in Figure 3 can be adopted, also can adopt other connected modes, specifically unrestricted, as long as the port resource of shared PSE device can be saved.Framework for Fig. 2 is described by following process.
503, in PSE device and each PD equipment end, the restriction output power of power supply of each Ethernet interface of local terminal is set respectively by main control unit.
504, the power module in PSE device starts, the type of self and operating state are sent to the POE control unit of local terminal, POE control unit exports specific power to each Ethernet interface according to the restriction output power of power supply that the main control unit of local terminal sets.
505, the first order PD equipment be connected with PSE device receives the power that PSE device exports, and first utilizes it to be the load supplying of local terminal, remaining power is exported to second level PD equipment; The second season PD equipment and PD equipment afterwards by that analogy, all first meet the power demands of self, then export unnecessary power to next stage.
So far, the power supply process of all PD equipment is completed.
The foregoing is 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 (8)
1. a power over ethernet electric power system for cascade, comprises PSE device and n PD equipment; Described PSE device comprises: POE power module, the first main control unit, a POE control unit and at least one Ethernet interface; Described POE power module, for out-put supply power to a POE control unit; Described first main control unit, is read the external power setting of a POE control unit and state for being completed by POE supervisory communications passage; A described POE control unit, for controlling limited Ethernet interface, being the power limitation that each Ethernet interface is arranged according to main control unit, being configured on each Ethernet interface by the power that POE power module exports and exporting; It is characterized in that,
Described n PD equipment is connected by cascade system with PSE device; And each PD equipment comprises the 2nd POE control unit, DC/DC converting unit, load and at least two Ethernet interfaces, by Ethernet interface respectively with PSE device/upper level PD equipment and next stage PD equipment connection;
2nd POE control unit, for controlling limited Ethernet interface, power received by local terminal is divided into two parts, be the load supplying of local terminal after DC/DC converting unit conversion process by wherein a part of power, by another part power configuration to each Ethernet interface to export next stage PD equipment to.
2. the power over ethernet electric power system of cascade as claimed in claim 1, it is characterized in that, described PD equipment also comprises: the second main control unit, reads the external power setting of the 2nd POE control unit of local terminal and state for being completed by POE supervisory communications passage.
3. the power over ethernet electric power system of cascade as claimed in claim 1 or 2, is characterized in that, described n PD equipment is connected successively.
4. the power over ethernet electric power system of cascade as claimed in claim 1 or 2, is characterized in that, described PSE device is switch or router.
5. a Power over Ethernet method for cascade, it is characterized in that, the method comprising the steps of:
Adopt cascade system that each PD equipment and PSE device are connected to form POE system;
Start the POE power module in PSE device, the POE control unit out-put supply power of local terminal is to each Ethernet interface;
In power output procedure, PD equipment at different levels receives by Ethernet interface the power that higher level equipment exports, and first utilizes it to be the load supplying of local terminal, then exports remaining power supply power to next stage PD equipment by Ethernet interface.
6. the Power over Ethernet method of cascade as claimed in claim 5, it is characterized in that, the method also comprises: before structure POE system, and power size needed for the general supply power exported according to PSE device and PD equipment, determining can the PD number of devices of cascade.
7. the Power over Ethernet method of cascade as claimed in claim 6, is characterized in that, the general supply watt level of the power size sum needed for all PD equipment≤PSE device output of described cascade.
8. the Power over Ethernet method of cascade as claimed in claim 5, it is characterized in that, the method also comprises: in PSE device and each PD equipment end, arrange the restriction output power of power supply of each Ethernet interface of local terminal respectively.
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| CN201210263179.0A CN102761422B (en) | 2012-07-27 | 2012-07-27 | A kind of power over ethernet electric power system of cascade and Power over Ethernet method thereof |
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| CN103856333B (en) * | 2012-12-03 | 2017-06-23 | 鸿富锦精密工业（深圳）有限公司 | May indicate that the Ethernet device and indicating means of state |
| CN107566132B (en) * | 2013-04-17 | 2021-05-04 | 柏思科技有限公司 | Method and system for supplying and receiving power over ethernet |
| US9594369B2 (en) * | 2013-10-01 | 2017-03-14 | Broadcom Corporation | Selective industrial power-over-network configuration and operation |
| US9634844B2 (en) * | 2014-01-30 | 2017-04-25 | Linear Technology Corporation | Detection scheme for four wire pair Power Over Ethernet system |
| CN105207785A (en) * | 2015-10-09 | 2015-12-30 | 浙江宇视科技有限公司 | PoE system |
| CN105610587B (en) * | 2016-03-17 | 2019-06-11 | 浙江宇视科技有限公司 | A kind of method of supplying power to and device |
| CN107888387B (en) * | 2016-09-30 | 2020-04-14 | 华为技术有限公司 | Power supply method, equipment and system |
| CN107979474B (en) | 2016-10-21 | 2020-06-26 | 华为技术有限公司 | Network device and power supply method |
| CN108933671B (en) * | 2017-05-26 | 2021-06-01 | 华为技术有限公司 | Power supply management method, equipment and system |
| CN110602821B (en) * | 2019-08-19 | 2022-03-22 | 广州市雅江光电设备有限公司 | POE power supply-based light control system, method and storage medium |
| CN110493015B (en) * | 2019-08-20 | 2024-04-09 | 广州市雅江光电设备有限公司 | POE signal switching equipment and signal switching method thereof |
| CN110658408B (en) * | 2019-10-14 | 2021-12-07 | 深圳供电局有限公司 | Test terminal platform and test system of transformer substation safety automatic device |
| EP3886362A1 (en) * | 2020-03-23 | 2021-09-29 | ABB Schweiz AG | Field device |
| CN114143120A (en) * | 2020-09-03 | 2022-03-04 | 瑞昱半导体股份有限公司 | Ethernet power supply device and power management method thereof |
| CN112415925A (en) * | 2020-10-30 | 2021-02-26 | 南京工程学院 | Displacement sensor control circuit and displacement sensor |
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