CN112526318A - Ethernet power supply circuit detection method and device - Google Patents
Ethernet power supply circuit detection method and device Download PDFInfo
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- CN112526318A CN112526318A CN202011326268.6A CN202011326268A CN112526318A CN 112526318 A CN112526318 A CN 112526318A CN 202011326268 A CN202011326268 A CN 202011326268A CN 112526318 A CN112526318 A CN 112526318A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
Abstract
The invention discloses a device and a method for detecting a Power Over Ethernet (POE) circuit, wherein the device comprises the following components: be applied to POE power supply unit including first group power supply cable pair and second group power supply cable pair, include: the device comprises a first detection unit, a second detection unit and a grading unit; the first detection unit is used for detecting power supply of a first group of power supply cable pairs and outputting a first detection level; and/or the second detection unit is used for detecting power supply of a second group of power supply cable pairs and outputting a second detection level; the classification unit is configured to determine the type of the POE power supply device according to the first detection level and/or the second detection level. The POE circuit detection device and method provided by the embodiment of the invention can determine the power supply type of the PSE equipment so as to determine the operation strategy of the PD equipment according to the power supply type.
Description
Technical Field
The present invention relates to the field of Power Over Ethernet (POE) circuit detection methods and apparatuses, and in particular, to a POE circuit detection method and apparatus.
Background
POE refers to using the existing ethernet wiring infrastructure to provide data transmission and dc power supply for some Internet Protocol (IP) based terminals. There are two standards that current POE systems can follow, namely IEEE802.3af and IEEE802.3 at. The POE system defines two basic devices according to the standard: a Power Sourcing Equipment (PSE) and a Powered Device (PD), the PD being Powered by the PSE.
The length of an Ethernet standard cable supported by POE power supply is hundred meters, and in order to enable a network cable to transmit larger power and reduce the loss of the power in the transmission process of the network cable, the standard makes clear setting on transmission voltage. The transmission voltage range specified by IEEE802.3af is 44-57V (generally 48V); the IEEE802.3at is raised to 50-57V. The POE power supply method includes a middle jumper and a tail end jumper, and supplies power to an idle wire pair and a data wire pair in an ethernet standard cable respectively. The POE standard limits the output power of the PSE, IEEE802.3af supports 15.4 watts (W), and IEEE802.3at maximum supports no more than 30W.
Conventional PSE power only supports 2 cable pairs. For example, the PSE supports only powering with cable 1, cable 2, cable 3 and cable 6 of the ethernet twisted pair, or powering with cable 4, cable 5, cable 7 and cable 8 of the ethernet twisted pair. For example, if the PSE is powered by cable 1, cable 2, cable 3, and cable 6 of the ethernet twisted pair, the PSE sends a detection signal to the opposite end, and determines that the opposite end has a valid PD when detecting that the resistance and capacitance of the opposite end are within a predetermined range, for example, the resistance is in a range of 19 kilo-ohms to 26.5 kilo-ohms (k Ω), and the capacitance is 0.150 microfarads (μ F).
The negotiation grade of the PSE and the PD is 0-4 grades, wherein the power provided by the PSE is the maximum in 4 grades, and the output power is about 30W. With the development of power over ethernet applications, the variety of PDs is more and more abundant, and more PDs with power requirements greater than 30W appear, which are generally called high-power powered devices. When the power required by the PD is greater than 30W, the PSE needs to use 4 cable pairs to supply power, i.e., the PD is simultaneously powered by the first set of cable pairs and the second set of cable pairs, which is the case when power is supplied to high power ethernet (HPoE). Wherein a first set of cable pairs, also referred to as alternate a (ALT a), includes cable pair 2 and cable pair 3, i.e., cable 1, cable 2, cable 3, and cable 6; a second set of cable pairs (ALT B) includes cable pair 1 and cable pair 4, i.e., including cable 4, cable 5, cable 7, and cable 8.
Therefore, a corresponding circuit needs to be designed for detecting whether the PSE device can supply power by using 4 cable pairs, so as to determine the operation strategy after the PD is powered on according to the detection result, so as to prevent the PD from operating at the maximum power under the condition of insufficient power supply.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting a Power Over Ethernet (POE) circuit, which are used for solving the problem in the prior art that how to determine the power supply type of PSE equipment so as to determine the operation strategy of PD equipment according to the power supply type.
An aspect of the present invention provides a POE circuit detection device, where the POE circuit detection device is applied to a POE power supply device including a first group of power supply cable pairs and a second group of power supply cable pairs, and the POE power supply device includes: the device comprises a first detection unit, a second detection unit and a grading unit; wherein the content of the first and second substances,
the first detection unit is used for detecting power supply of the first group of power supply cable pairs and outputting a first detection level; and/or the presence of a gas in the gas,
the second detection unit is used for detecting power supply of a second group of power supply cable pairs and outputting a second detection level;
the classification unit is configured to determine the type of the POE power supply device according to the first detection level and/or the second detection level.
Optionally, the first detection unit is a first switch control chip, and the second detection unit is a second switch control chip.
Alternatively, when the first group of power cable pairs includes cable pair 2 and cable pair 3, the second group of power cable pairs includes cable pair 1 and cable pair 4,
the first switch control chip is specifically configured to be connected to the cable pair 3 through a VSS terminal thereof, receive a detection current input by the cable pair 3, and output a first detection level to the classification unit through a T2P terminal thereof;
the second switch control chip is specifically configured to be connected to the cable pair 4 through its own VSS terminal, receive the detection current input by the cable pair 4, and output a second detection level to the classification unit through its own T2P terminal.
Further, the device further comprises a DC-DC conversion unit, positive terminals of input terminals of the DC-DC conversion unit are respectively connected with the cable pair 2 and the cable pair 1, and negative terminals of input terminals of the DC-DC conversion unit are respectively connected with the cable pair 3 and the cable pair 4, and are used for performing voltage conversion on power supplies output by the first group of power supply cables and the second group of power supply cables.
Optionally, the classifying unit is specifically configured to obtain a detection level waveform according to the received first detection level and/or the second detection level, and determine the type of the POE power supply device according to a mapping relationship between a pre-configured level waveform and the type of the power supply device.
Another aspect of the embodiments of the present invention further provides a method for detecting a POE power over ethernet circuit, where the method is applied to a POE power supply device including a first group of power supply cable pairs and a second group of power supply cable pairs, and the method includes:
the first detection unit is used for detecting power supply of the first group of power supply cable pairs and outputting a first detection level; and/or the presence of a gas in the gas,
the second detection unit is used for detecting power supply of the second group of power supply cable pairs and outputting a second detection level;
and the classification unit determines the type of the POE power supply equipment according to the first detection level and/or the second detection level.
Optionally, the first detection unit is a first switch control chip, and the second detection unit is a second switch control chip.
Alternatively, when the first group of power cable pairs includes cable pair 2 and cable pair 3, the second group of power cable pairs includes cable pair 1 and cable pair 4,
the first detecting element is to supplying power the detection to first group power supply cable pair, and the output first detection level specifically includes:
the self VSS terminal is connected with the cable pair 3, receives the detection current input by the cable pair 3, and outputs a first detection level to the classification unit through the self T2P terminal;
the second detection unit is used for detecting power supply of a second group of power supply cable pairs and outputting a second detection level, and the method specifically comprises the following steps;
the self VSS terminal is connected with the cable pair 4, receives the detection current input by the cable pair 4, and outputs a second detection level to the classification unit through the self T2P terminal.
Further, the method further comprises:
the DC-DC conversion unit is used for performing voltage conversion on power supplies output by the first group of power supply cables and the second group of power supply cables; the positive ends of the input ends of the DC-DC conversion units are respectively connected with the cable pair 2 and the cable pair 1, and the negative ends of the input ends of the DC-DC conversion modules are respectively connected with the cable pair 3 and the cable pair 4.
Optionally, the classifying unit determines the type of the POE power supply device according to the first detection level and/or the second detection level, and specifically includes:
and obtaining a detection level waveform according to the received first detection level and/or the second detection level, and determining the type of the POE power supply equipment according to a mapping relation between a pre-configured level waveform and the type of the power supply equipment.
The invention has the following beneficial effects:
the method and the device for detecting the POE circuit of the power over Ethernet provided by the embodiment of the invention are applied to POE power supply equipment comprising a first group of power supply cable pairs and a second group of power supply cable pairs, and comprise the following steps: the device comprises a first detection unit, a second detection unit and a grading unit; the power supply detection is carried out on the first group of power supply cable pairs through a first detection unit, and a first detection level is output; and/or the second detection unit detects the power supply of the second group of power supply cable pairs and outputs a second detection level; and the classification unit determines the type of the POE power supply equipment according to the first detection level and/or the second detection level. The embodiment of the invention respectively detects the power supply of the power supply cable pair of the power supply equipment PSE, identifies and classifies the power supply type and the power supply power of the PSE, determines the maximum power supply power which can be provided by the power supply equipment PSE, and can detect the two groups of power supply cable pairs in an isolation way without mutual influence.
Drawings
Fig. 1 is a schematic structural diagram of a power over ethernet POE circuit detection device in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a POE circuit detection device in the embodiment of the present invention;
fig. 3 is a schematic flow chart illustrating an implementation of the method for detecting a POE over ethernet circuit in the embodiment of the present invention.
Detailed Description
In order to solve the problem in the prior art that how to determine the power supply type of the PSE device to determine the operation policy of the PD device according to the power supply type, the POE circuit detection device for power over ethernet provided by the embodiment of the present invention is first configured. The structure of the apparatus of the present invention is shown in fig. 1, and the apparatus is applied to a POE power supply device including a first group of power supply cable pairs and a second group of power supply cable pairs, and includes: a first detection unit 11, a second detection unit 12, a classification unit 13; wherein the content of the first and second substances,
the first detection unit 11 is configured to perform power supply detection on a first group of power supply cable pairs and output a first detection level; and/or the presence of a gas in the gas,
the second detection unit 12 is configured to perform power supply detection on a second group of power supply cable pairs and output a second detection level;
the classification unit 13 is configured to determine the type of the POE power supply device according to the first detection level and/or the second detection level.
Preferably, the first detecting unit 11 is a first switch control chip, and the second detecting unit 12 is a second switch control chip. For example, the first and second switch control chips may be switch controllers TPS 23752.
Preferably, with reference to fig. 2, when the first set of power supply cable pairs comprises cable pair 2 and cable pair 3, i.e. cable 1, cable 2, cable 3 and cable 6; when the second group of power supply cable pairs includes cable pair 1 and cable pair 4, i.e. cable 4, cable 5, cable 7 and cable 8,
the first switch control chip is specifically configured to be connected to the cable pair 3 through a power supply negative electrode (VSS) terminal of the first switch control chip, receive a detection current input by the cable pair 3, and output a first detection level to the classification unit 13 through a Type-2-PSE Type device identification (T2P) terminal of the first switch control chip;
the second switch control chip is specifically configured to be connected to the cable pair 4 through its own VSS terminal, receive the detection current input by the cable pair 4, and output a second detection level to the classification unit 13 through its own T2P terminal.
Optionally, referring to fig. 2, the apparatus further includes a DC-DC conversion unit, positive ends of input ends of the DC-DC conversion unit are respectively connected to the cable pair 2 and the cable pair 1, and negative ends of input ends of the DC-DC conversion unit are respectively connected to the cable pair 3 and the cable pair 4, so as to perform voltage conversion on power supplies output by the first group of power supply cables and the second group of power supply cables.
The classification unit 13 is specifically configured to obtain a detection level waveform according to the received first detection level and/or the second detection level, and determine the type of the POE power supply device according to a mapping relationship between a pre-configured level waveform and the type of the power supply device. Alternatively, referring to fig. 2, the classification unit 13 may be implemented by a programmable logic device (CPLD). Specifically, when the classification unit 13 compares the level waveforms of the power supply apparatuses according to the prestored 802.3af standard, 802.3at standard, and HPoE standard with the detected level waveforms, it is determined which standard the power supply apparatus can supply power.
The POE power over ethernet circuit detection device provided in the embodiment of the present invention is applied to POE power supply equipment including a first group of power supply cable pairs and a second group of power supply cable pairs, and includes: the device comprises a first detection unit, a second detection unit and a grading unit; the power supply detection is carried out on the first group of power supply cable pairs through a first detection unit, and a first detection level is output; and/or the second detection unit detects the power supply of the second group of power supply cable pairs and outputs a second detection level; and the classification unit determines the type of the POE power supply equipment according to the first detection level and/or the second detection level. The embodiment of the invention respectively performs power supply detection on the power supply cable pairs of the power supply equipment PSE, identifies and classifies the power supply type and the power supply power of the PSE, determines the maximum power supply power which can be provided by the PSE power supply equipment, can perform isolated detection on two groups of power supply cable pairs, does not affect each other, performs power supply output through the same DC-DC conversion circuit, and can determine the power supply type of the PSE equipment at low cost so as to determine the operation strategy of the PD equipment according to the power supply type.
Based on the same inventive concept, an embodiment of the present invention provides a method for detecting a POE power over ethernet circuit, where the method may be applied to POE power supply equipment including a first group of power supply cable pairs and a second group of power supply cable pairs, and an implementation flow is as shown in fig. 3, where the method includes the following steps:
301, a first detection unit performs power supply detection on a first group of power supply cable pairs and outputs a first detection level; and/or the presence of a gas in the gas,
302, the second detection unit performs power supply detection on the second group of power supply cable pairs and outputs a second detection level;
It should be understood that step 301, and step 302 are not dependent, and the execution order is not sequential.
Optionally, the first detection unit is a first switch control chip, and the second detection unit is a second switch control chip. For example, the switch control chip may be a switch controller TPS 23752.
Alternatively, when the first group of power cable pairs includes cable pair 2 and cable pair 3, the second group of power cable pairs includes cable pair 1 and cable pair 4,
the first detecting element is to supplying power the detection to first group power supply cable pair, and the output first detection level specifically includes:
the self VSS terminal is connected with the cable pair 3, receives the detection current input by the cable pair 3, and outputs a first detection level to the classification unit through the self T2P terminal;
the second detection unit is used for detecting power supply of a second group of power supply cable pairs and outputting a second detection level, and the method specifically comprises the following steps;
the self VSS terminal is connected with the cable pair 4, receives the detection current input by the cable pair 4, and outputs a second detection level to the classification unit through the self T2P terminal.
Further, the method further comprises:
the DC-DC conversion unit is used for performing voltage conversion on power supplies output by the first group of power supply cables and the second group of power supply cables; the positive ends of the input ends of the DC-DC conversion units are respectively connected with the cable pair 2 and the cable pair 1, and the negative ends of the input ends of the DC-DC conversion modules are respectively connected with the cable pair 3 and the cable pair 4.
Optionally, the classifying unit determines the type of the POE power supply device according to the first detection level and/or the second detection level, and specifically includes:
and obtaining a detection level waveform according to the received first detection level and/or the second detection level, and determining the type of the POE power supply equipment according to a mapping relation between a pre-configured level waveform and the type of the power supply equipment. Specifically, when the classification unit 13 compares the level waveforms of the power supply apparatuses according to the prestored 802.3af standard, 802.3at standard, and HPoE standard with the detected level waveforms, it is determined which standard the power supply apparatus can supply power.
It should be understood that the implementation principle and the process of the POE circuit detection method provided by the embodiment of the present invention are similar to those in fig. 1 and 2 and the embodiments shown above, and are not described herein again.
The method and the device for detecting the POE circuit of the power over Ethernet provided by the embodiment of the invention are applied to POE power supply equipment comprising a first group of power supply cable pairs and a second group of power supply cable pairs, and comprise the following steps: the device comprises a first detection unit, a second detection unit and a grading unit; the power supply detection is carried out on the first group of power supply cable pairs through a first detection unit, and a first detection level is output; and/or the second detection unit detects the power supply of the second group of power supply cable pairs and outputs a second detection level; and the classification unit determines the type of the POE power supply equipment according to the first detection level and/or the second detection level. The embodiment of the invention respectively performs power supply detection on the power supply cable pairs of the power supply equipment PSE, identifies and classifies the power supply type and the power supply power of the PSE, determines the maximum power supply power which can be provided by the PSE power supply equipment, can perform isolated detection on two groups of power supply cable pairs, does not affect each other, performs power supply output through the same DC-DC conversion circuit, and can determine the power supply type of the PSE equipment at low cost so as to determine the operation strategy of the PD equipment according to the power supply type.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
In addition, in some of the flows described in the above embodiments and the drawings, a plurality of operations are included in a specific order, but it should be clearly understood that the operations may be executed out of the order presented herein or in parallel, and the sequence numbers of the operations, such as 201, 202, 203, etc., are merely used for distinguishing different operations, and the sequence numbers themselves do not represent any execution order. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While alternative embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (10)
1. The utility model provides a power over Ethernet POE circuit detection device which characterized in that, the device is applied to the POE power supply unit who includes first group power supply cable pair and second group power supply cable pair, includes: the device comprises a first detection unit, a second detection unit and a grading unit; wherein the content of the first and second substances,
the first detection unit is used for detecting power supply of the first group of power supply cable pairs and outputting a first detection level; and/or the presence of a gas in the gas,
the second detection unit is used for detecting power supply of a second group of power supply cable pairs and outputting a second detection level;
the classification unit is configured to determine the type of the POE power supply device according to the first detection level and/or the second detection level.
2. The apparatus of claim 1, wherein the first detection unit is a first switch control chip and the second detection unit is a second switch control chip.
3. The apparatus of claim 2, wherein when the first set of power cable pairs comprises cable pair 2 and cable pair 3, and the second set of power cable pairs comprises cable pair 1 and cable pair 4,
the first switch control chip is specifically configured to be connected to the cable pair 3 through a power supply negative electrode VSS terminal of the first switch control chip, receive the detection current input by the cable pair 3, and output a first detection level to the classification unit through a T2P terminal of the first switch control chip;
the second switch control chip is specifically configured to be connected to the cable pair 4 through a power supply negative terminal VSS thereof, receive the detection current input by the cable pair 4, and output a second detection level to the classification unit through a terminal T2P thereof.
4. The apparatus according to claim 2, further comprising a DC-DC conversion unit, wherein positive terminals of input terminals of the DC-DC conversion unit are respectively connected to the cable pair 2 and the cable pair 1, and negative terminals of input terminals of the DC-DC conversion unit are respectively connected to the cable pair 3 and the cable pair 4, for performing voltage conversion on power sources output by the first group of power supply cables and the second group of power supply cables.
5. The apparatus according to any one of claims 1 to 4, wherein the classification unit is specifically configured to obtain a detection level waveform according to the received first detection level and/or the second detection level, and determine the type of the POE power supply device according to a mapping relationship between a pre-configured level waveform and the type of the power supply device.
6. A method for detecting a POE circuit, wherein the method is applied to a POE power supply device comprising a first group of power supply cable pairs and a second group of power supply cable pairs, and the method comprises the following steps:
the first detection unit is used for detecting power supply of the first group of power supply cable pairs and outputting a first detection level; and/or the presence of a gas in the gas,
the second detection unit is used for detecting power supply of the second group of power supply cable pairs and outputting a second detection level;
and the classification unit determines the type of the POE power supply equipment according to the first detection level and/or the second detection level.
7. The method of claim 6, wherein the first detection unit is a first switch control chip and the second detection unit is a second switch control chip.
8. The method of claim 7, wherein when the first set of power cable pairs includes cable pair 2 and cable pair 3, and the second set of power cable pairs includes cable pair 1 and cable pair 4,
the first detecting element is to supplying power the detection to first group power supply cable pair, and the output first detection level specifically includes:
the first switch control chip is connected with the cable pair 3 through a VSS end of the first switch control chip, receives the detection current input by the cable pair 3, and outputs a first detection level to the classification unit through a T2P end of the first switch control chip;
the second detecting unit supplies power to the second group power supply cable pair and detects, and the output second detection level specifically includes:
the second switch control chip is connected with the cable pair 4 through a VSS end of the second switch control chip, receives the detection current input by the cable pair 4, and outputs a second detection level to the classification unit through a T2P end of the second switch control chip.
9. The method of claim 7, further comprising:
the DC-DC conversion unit is used for performing voltage conversion on power supplies output by the first group of power supply cables and the second group of power supply cables; the positive ends of the input ends of the DC-DC conversion units are respectively connected with the cable pair 2 and the cable pair 1, and the negative ends of the input ends of the DC-DC conversion modules are respectively connected with the cable pair 3 and the cable pair 4.
10. The method according to any of claims 6 to 9, wherein the determining, by the classification unit, the type of the POE power supply device according to the first detection level and/or the second detection level specifically includes:
and the classification unit obtains a detection level waveform according to the received first detection level and/or the second detection level, and determines the type of the POE power supply equipment according to a mapping relation between a pre-configured level waveform and the type of the power supply equipment.
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