CN204882744U - Power equipment detection circuitry and power equipment - Google Patents
Power equipment detection circuitry and power equipment Download PDFInfo
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- CN204882744U CN204882744U CN201520502524.0U CN201520502524U CN204882744U CN 204882744 U CN204882744 U CN 204882744U CN 201520502524 U CN201520502524 U CN 201520502524U CN 204882744 U CN204882744 U CN 204882744U
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Abstract
The utility model discloses a power equipment detection circuitry and power equipment is applied to power supply technical field, has solved the big technical problem of the PD detection scheme debugging degree of difficulty among the prior art to and the PD among the prior art detects the technical problem that the scheme only can supply the power supply unit about 40-55V to use. Wherein, power equipment detection circuitry, be applied to poE equipment on, this power equipment detection circuitry include: the PD polling circuit, PD discrimination circuit, first ether net gape, power output switch, power supply circuit change over switch. The technical scheme of the utility model realized the use that can support to be less than the following power supply unit of 40V, the application is nimble, and the feedback discrimination circuit of adoption debugs easily, changes in the realization.
Description
Technical field
The utility model relates to power supply technique field, particularly relates to a kind of power apparatus testing circuit and power apparatus.
Background technology
When existing Ethernet Cat.5 wiring architecture does not make any changes, for some are based on IP (InternetProtocol, Internet protocol) terminal (as IP telephone machine, wireless local network connecting point, web camera etc.) transmission of data signals while, the technology of direct current supply can also be provided by kind equipment for this reason.PoE (PowerSupplyEquipment, POE) technology can ensure the normal operation of existing network while guaranteeing existing structureization wiring safety, reduces costs to greatest extent.
Current industry mainly contains IEEE802.3af and IEEE802.3at about the standard of PoE, supports that PD (PowerDevice, power apparatus) power consumption is up to 25.5w.In addition, also have industry to use nonstandard LTPoE++ comparatively widely, support the PD power consumption up to 90w.
IEEE802.3af, IEEE802.3at and LTPoE++ regulation PSE output voltage and PD input voltage are all approximately 40V ~ 55V, only can for the power-supply unit of about 40 ~ 55V.
In addition, existing PD detection scheme is based on current sample, and need precision, complicated circuit realiration, debugging difficulty is large.
Utility model content
The purpose of this utility model is to provide a kind of power apparatus testing circuit and power apparatus, to solve the technical matters that in prior art, PD detection scheme debugging difficulty is large, and PD detection scheme of the prior art only can for the technical matters of the power-supply unit of about 40 ~ 55V.
First aspect, the utility model provides a kind of power apparatus testing circuit by embodiment, is applied on PoE equipment, described power apparatus testing circuit comprises: PD polling circuit, PD judging circuit, the first Ethernet interface, switch of power supply output, power circuit change-over switch; The PoE power supply of described PoE equipment successively by the first transmission line of described switch of power supply output, described power circuit change-over switch and described first Ethernet interface to or the second transmission line of described first Ethernet interface to being connected; Described PD polling circuit comprises time controling input end, differentiates result input end and power control signal output terminal, wherein, described time controling input end access poll time control signal, described power control signal output terminal is connected with the power control signal input end of described switch of power supply output; Described PD judging circuit comprises circuit switching control signal output terminal, differentiates result output terminal, the first feedback signal reception end, the second feedback signal reception end, wherein, described first feedback signal reception end connects described first transmission line pair, described second feedback signal reception end connects described second transmission line pair, described differentiation result output terminal connects described differentiation result input end, and the circuit switching control signal input end of described power circuit change-over switch is connected with described circuit switching control signal output terminal.
Preferably, described PoE power supply is accessed in one end of described switch of power supply output, and the other end connects the free end of described power circuit change-over switch, described first transmission line to described second transmission line to the upper stiff end all establishing described power circuit change-over switch; Wherein, under the control of described PD polling circuit, described switch of power supply output is closed or disconnect; Wherein, under the control of described PD judging circuit, described power circuit change-over switch is switched to described second transmission line to being connected, or is switched to described first transmission line being connected.
Second aspect, the utility model provides a kind of power apparatus by embodiment, with the PoE equipment interconnection with power apparatus testing circuit, described power apparatus comprises: the second Ethernet interface and PD feedback circuit, wherein, described PD feedback circuit comprises detection signal input end and feedback signals output terminal, and described detection signal input end connects the 3rd transmission line pair of described second Ethernet interface, and described feedback signal output connects the 4th transmission line pair of described second Ethernet interface; Wherein, when described second Ethernet interface and described PoE equipment interconnection, the PoE power supply of described PoE equipment is by after described power apparatus testing circuit and described 3rd transmission line, described PD feedback circuit is transferred to from described detection signal input end, then described PD feedback circuit returns effective PD feedback signal from described feedback signal output, described effective PD feedback signal by described 4th transmission line to being transferred to described power apparatus testing circuit; Wherein, described PoE power supply is by after described power apparatus testing circuit and described 4th transmission line, and when being transferred to described PD feedback circuit from described feedback signal output, described PD feedback circuit does not respond.
The technical scheme that the utility model is provided by embodiment, at least has following technique effect or advantage:
Whether 1, PD judging circuit correctly can detect load is containing corresponding PD feedback circuit, not influence by voltage, the use lower than below 40V power-supply unit can be supported, use flexibly, solving PD detection scheme of the prior art only can for the technical matters of the power-supply unit of about 40 ~ 55V, and the application that compensate for existing PoE is blank.
2, without the need to accurate, complicated sample circuit, the feedback judging circuit of employing is easily debugged, the technical matters that PD detection scheme debugging difficulty is large, is easier to realize.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of power apparatus testing circuit in the utility model embodiment;
Fig. 2 is the connection diagram of power apparatus testing circuit and PD feedback circuit in the utility model embodiment;
Fig. 3 is the process flow diagram of the method for detection power equipment in the utility model embodiment.
Embodiment
In order to solve the technical matters that in prior art, PD detection scheme debugging difficulty is large, and PD detection scheme of the prior art only can for the technical matters of the power-supply unit of about 40 ~ 55V, the utility model embodiment provides a kind of power apparatus testing circuit and power apparatus, and general thought is as follows:
Comprise PD testing circuit and PD end portion, PD testing circuit is applied on PoE equipment, whether be containing PD testing circuit corresponding PD end, or general Ethernet interface if making the PoE equipment with PD judging circuit correctly can detect load, thus determine PSE whether supplying power for outside.
Pass through such scheme, whether PD judging circuit correctly can detect load is containing corresponding PD feedback circuit, not influence by voltage, the use lower than below 40V power-supply unit can be supported, use flexibly, solving PD detection scheme of the prior art only can for the technical matters of the power-supply unit of about 40 ~ 55V, and the application that compensate for existing PoE is blank.And without the need to accurate, complicated sample circuit, the feedback judging circuit of employing is easily debugged, the technical matters that PD detection scheme debugging difficulty is large, be easier to realize.
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Shown in figure 1, a kind of power apparatus testing circuit that the utility model embodiment provides, be applied on PoE equipment, the power apparatus testing circuit that the utility model embodiment provides comprises: PD polling circuit 1, PD judging circuit 2, first Ethernet interface 3, switch of power supply output 4, power circuit change-over switch 5.
First Ethernet interface 3 comprise the first transmission line to 7 and second transmission line to 8.The PoE power supply 6 of PoE equipment successively by after switch of power supply output 4, power circuit change-over switch 5 with the first transmission line to 7 or second transmission line be connected 8.
Whether PD polling circuit 1 has load to access on cycle polling PoE equipment, and controls unlatching or the closedown of switch of power supply output 4, and the time span of the unlatching of regulable control switch of power supply output 4 and the time span of closedown.
Concrete, PD polling circuit 1 comprises time controling input end 9, differentiates result input end 10 and power control signal output terminal 11, time controling input end 9 accesses poll time control signal, and power control signal output terminal 11 is connected with the power control signal input end 12 of switch of power supply output 4;
Specifically, PD polling circuit 1 receives poll time control signal when being useful signal, exports close command by power control signal output terminal 11 to switch of power supply output 4, controls switch of power supply output 4 and opens; When poll time control signal is invalid signals, export open command by power control signal output terminal 11 to switch of power supply output 4, switch of power supply output 4 is closed.
PD judging circuit 2 is for receiving PD feedback signal, judge that load is PD end or general RJ45LAN (LocalAreaNetwork based on PD feedback signal, LAN (Local Area Network)) mouth or WAN (WANWideAreaNetwork, wide area network) mouth, thus determine PoE power supply 6 whether supplying power for outside.
Concrete, PD judging circuit 2 comprises circuit switching control signal output terminal 13, differentiate result output terminal 14, first feedback signal reception end 15, second feedback signal reception end 16, wherein, first feedback signal reception end 15 correspondence connects the first transmission line to 7, and the second feedback signal reception end 16 correspondence connects the second transmission line to 8, differentiates that result output terminal 14 connects and differentiates result input end 10.The circuit switching control signal input end 17 of power circuit change-over switch 5 is connected with circuit switching control signal output terminal 13.
Shown in Fig. 2, be the PD end containing PD feedback circuit 18 and the second Ethernet interface 19 for load, the course of work of the power apparatus testing circuit in the utility model embodiment be described:
Under initial situation, the free end of power circuit change-over switch 5 connects the first transmission line to 7, when PoE power supply 6 is transferred to 7 the second Ethernet interface 19 docked with the first Ethernet interface 3 by the first transmission line, PD feedback circuit 18 is transferred to 20 from the 3rd transmission line of the second Ethernet interface 19, PD feedback circuit 18 returns effective PD feedback signal, effective PD feedback signal turns back to the first Ethernet interface 3 through the 4th transmission line to 21, successively through the second transmission line of the first Ethernet interface 3 to 8, second feedback signal reception end 16 is transferred to PD judging circuit 2, PD judging circuit 2 receives after this effective PD feedback signal to power circuit change-over switch 5 outlet line switching command, next poll time control signal be useful signal arrive before, the free end of power circuit change-over switch 5 is switched to and is connected 8 with the second transmission line.When PoE power supply 6 is transferred to PD feedback circuit 18 to the 8, the 4th transmission line to 21 by the second transmission line.Now, PD feedback circuit 18 does not send effective PD feedback signal, therefore, in this poll time, does not have effective PD feedback signal to enter the first feedback signal reception end 15, then the first feedback signal reception end 15 keeps being input as invalid current potential.Through said process, show that accessed load is PD end.
Then, the differentiation result of " load is PD end " is transferred to PD polling circuit 1 by differentiation result output terminal 14 by PD judging circuit 2, PD polling circuit 1 stops poll after the differentiation result receiving this " load is PD end ", and send by power control signal output terminal 11 often open instruction to transmission switch of power supply output 4, then switch of power supply output 4 closes as normally open, simultaneously power circuit change-over switch 5 revert to free end connect the second transmission line to 8 default conditions, thus PoE power supply 6 holds continued power to PD, and when PD end disconnects with PoE equipment, second feedback signal reception end 16 of PD judging circuit 2 becomes high level from from low level, then PD judging circuit 2 thinks that PD holds load to disconnect, judging circuit 2 informs PD polling circuit 1, PD polling circuit 1 is sent by power control signal output terminal 11 stop PoE and to power instruction, then switch of power supply output 4 disconnects, cut off supply line.
Concrete, the first Ethernet interface 3 is RJ45 network interface.Power circuit change-over switch 5 is hilted broadsword double control switch.One end access PoE power supply 6 of switch of power supply output 4, the free end of the other end connecting power line road change-over switch 5 of switch of power supply output 4, the first transmission line to 7 and second transmission line to the stiff end all establishing power circuit change-over switch 5 on 8.
The method of power apparatus testing circuit detection power equipment, be applied to power apparatus testing circuit when docking the second Ethernet interface, referring to figs. 2 and 3 shown, the method comprises the steps:
S1, PD polling circuit 1 receives poll time control signal when being useful signal, and PD polling circuit 1 controls switch of power supply output 4 and closes, and makes PoE power supply 6 be transferred to the 3rd transmission line of the second Ethernet interface 19 to 20 by the first transmission line to 7;
If S2 second feedback signal reception end 16 receives effective PD feedback signal, then PD judging circuit 2 controls power circuit change-over switch 5 and is switched to and is connected 8 with the second transmission line, makes PoE power supply 6 be transferred to the 4th transmission line of the second Ethernet interface 19 to 21 by the second transmission line to 8;
S3, after power circuit change-over switch 5 is switched to and is connected 8 with the second transmission line, if the first feedback signal reception end 15 does not receive effective PD feedback signal, then determine that the second Ethernet interface 19 place load is the differentiation result of PD end;
S4, PD judging circuit 2 stops inquiry after receiving and differentiating result, and control switch of power supply output 4 and keep normally open, power circuit switches to original state, makes PoE power supply 6 hold continued power to PD, wherein, this original state is: power circuit change-over switch 5 is connected 7 with the first transmission line.
Conceive based on same utility model, shown in figure 2, the utility model embodiment still provides a kind of power apparatus, with the PoE equipment interconnection with power apparatus testing circuit, power apparatus comprises: the second Ethernet interface 19 and PD feedback circuit 18, second Ethernet interface 19 comprise the 3rd transmission line to 20 and the 4th transmission line to 21, wherein, PD feedback circuit 18 comprises detection signal input end 22 and feedback signals output terminal 23, detection signal input end 22 connects the 3rd transmission line to 20, and feedback signal output 23 connects the 4th transmission line to 21; Wherein, when second Ethernet interface 19 is with PoE equipment interconnection, the PoE power supply 6 of PoE equipment is by after power apparatus testing circuit and the 3rd transmission line 20, PD feedback circuit 18 is transferred to from detection signal input end 22, then PD feedback circuit 18 returns effective PD feedback signal from feedback signal output 23, and effective PD feedback signal is transferred to power apparatus testing circuit by the 4th transmission line to 21; Wherein, PoE power supply 6 is by after power apparatus testing circuit and the 4th transmission line 21, and when being transferred to PD feedback circuit 18 from feedback signal output 23, PD feedback circuit 18 does not respond.
One or more technical schemes that the utility model is provided by embodiment, at least have following technique effect or advantage:
Whether 1, PD judging circuit correctly can detect load is containing corresponding PD feedback circuit, not influence by voltage, the use lower than below 40V power-supply unit can be supported, use flexibly, solving PD detection scheme of the prior art only can for the technical matters of the power-supply unit of about 40 ~ 55V, and the application that compensate for existing PoE is blank.
2, without the need to accurate, complicated sample circuit, the feedback judging circuit of employing is easily debugged, the technical matters that PD detection scheme debugging difficulty is large, is easier to realize.
Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (3)
1. a power apparatus testing circuit, is applied on PoE equipment, it is characterized in that, described power apparatus testing circuit comprises: PD polling circuit, PD judging circuit, the first Ethernet interface, switch of power supply output, power circuit change-over switch;
The PoE power supply of described PoE equipment successively by the first transmission line of described switch of power supply output, described power circuit change-over switch and described first Ethernet interface to or the second transmission line of described first Ethernet interface to being connected;
Described PD polling circuit comprises time controling input end, differentiates result input end and power control signal output terminal, wherein, described time controling input end access poll time control signal, described power control signal output terminal is connected with the power control signal input end of described switch of power supply output;
Described PD judging circuit comprises circuit switching control signal output terminal, differentiates result output terminal, the first feedback signal reception end, the second feedback signal reception end, wherein, described first feedback signal reception end connects described first transmission line pair, described second feedback signal reception end connects described second transmission line pair, described differentiation result output terminal connects described differentiation result input end, and the circuit switching control signal input end of described power circuit change-over switch is connected with described circuit switching control signal output terminal.
2. power apparatus testing circuit as claimed in claim 1, it is characterized in that, described PoE power supply is accessed in one end of described switch of power supply output, the other end connects the free end of described power circuit change-over switch, described first transmission line to described second transmission line to the upper stiff end all establishing described power circuit change-over switch;
Wherein, under the control of described PD polling circuit, described switch of power supply output is closed or disconnect;
Wherein, under the control of described PD judging circuit, described power circuit change-over switch is switched to described second transmission line to being connected, or is switched to described first transmission line being connected.
3. a power apparatus, with the PoE equipment interconnection with power apparatus testing circuit, it is characterized in that, described power apparatus comprises: the second Ethernet interface and PD feedback circuit, wherein, described PD feedback circuit comprises detection signal input end and feedback signals output terminal, and described detection signal input end connects the 3rd transmission line pair of described second Ethernet interface, and described feedback signal output connects the 4th transmission line pair of described second Ethernet interface;
Wherein, when described second Ethernet interface and described PoE equipment interconnection, the PoE power supply of described PoE equipment is by after described power apparatus testing circuit and described 3rd transmission line, described PD feedback circuit is transferred to from described detection signal input end, then described PD feedback circuit returns effective PD feedback signal from described feedback signal output, described effective PD feedback signal by described 4th transmission line to being transferred to described power apparatus testing circuit;
Wherein, described PoE power supply is by after described power apparatus testing circuit and described 4th transmission line, and when being transferred to described PD feedback circuit from described feedback signal output, described PD feedback circuit does not respond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520502524.0U CN204882744U (en) | 2015-07-10 | 2015-07-10 | Power equipment detection circuitry and power equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520502524.0U CN204882744U (en) | 2015-07-10 | 2015-07-10 | Power equipment detection circuitry and power equipment |
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| CN204882744U true CN204882744U (en) | 2015-12-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991143A (en) * | 2015-07-10 | 2015-10-21 | 博为科技有限公司 | Power device detection circuit, power device detection method and power device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991143A (en) * | 2015-07-10 | 2015-10-21 | 博为科技有限公司 | Power device detection circuit, power device detection method and power device |
| CN104991143B (en) * | 2015-07-10 | 2018-01-23 | 博为科技有限公司 | Power apparatus detection circuit, the method and power apparatus for detecting power apparatus |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 314400 Room 201, building 2, No. 306, Gushui Road, Haining Economic Development Zone, Haining City, Jiaxing City, Zhejiang Province Patentee after: BIRTRONIX TECHNOLOGY CORPORATION Address before: 307, room 2, building 522, 314000 Asia Pacific Road, Nanhu District, Zhejiang, Jiaxing Patentee before: BIRTRONIX TECHNOLOGY CORPORATION |
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| CP02 | Change in the address of a patent holder |