CN101908987A - Method and device for detecting capability of power supply equipment - Google Patents

Abstract

The invention provides a method and device for detecting the capability of power supply equipment, which relate to the communication field and solve the problem that the detection accuracy of PSE to PD type cannot be known in the prior art. The method includes: adjusting the test voltage output by the power supply device to a different voltage value; using the adjusted different voltage value to output to the same power receiving device; The types detected under different voltage values; according to the detection results of the power supply equipment, determine the detection accuracy of the power supply equipment for the type of the powered equipment. The technical solution provided by the invention can be applied to equipment performance management.

Description

Method and device for detecting capability of power supply equipment

technical field

The invention relates to the communication field, in particular to a method and a device for detecting the capability of power supply equipment.

Background technique

Power over Ethernet POE (Power Over Ethernet, POE) system is a system that uses standard CAT5/5e twisted pair cables to remotely distribute power to powered devices connected to the remote end of the Ethernet through an Ethernet data transmission link. The system is mainly composed of three parts: power supply equipment (Power-Sourcing Equipment, PSE), usually refers to Ethernet switches, routers, hubs or other network switching equipment; Power receiving devices, such as IP phones, network cameras, wireless Ethernet access point devices, etc.; power supply interface links (Power Interface, PI), usually standard CAT5/5e twisted pair cables.

The IEEE802.3af and IEEE802.3at standards stipulate two power-over-Ethernet implementation modes, which are end span mode (endspan) and midspan mode (midspan) respectively. An end-span PSE device is an Ethernet device that combines power supply functions with data transmission functions, and a mid-span PSE device is generally used in switching devices that do not have power supply functions (such as switches, routers, hubs, or other network switching devices. ) and the power supply equipment between the powered equipment, the power is independently loaded into the line, this method realizes switching equipment (such as Ethernet switches, routers, hubs or other network switching equipment) that does not have the inherent power supply function Smooth transition to Ethernet devices with Power over Ethernet.

Before the PSE side, as the power supply device side, supplies power to the PD powered device side, it needs to perform a series of detection on the PD side, including PD type detection, power supply classification detection, overcurrent detection, and PD disconnection detection. Since the existing technology cannot know the ability of PSE to detect PD types, errors may occur when PSE detects certain types of PDs. For example, PSE has low detection accuracy for certain types of PDs. If you continue to use this PSE for detection , when this type of PD is detected, a detection error or a problem that a detection result cannot be detected will occur.

Contents of the invention

The present invention provides a method and a device for detecting the capability of power supply equipment, which solves the problem in the prior art that the detection accuracy of PSE to PD type cannot be known.

In order to solve the technical problems in the prior art, the present invention provides the following technical solutions:

A device for detecting the capability of power supply equipment, comprising:

The voltage adjustment module is used to adjust the test voltage output by the power supply equipment to different voltage values;

A power-on module, connected to the voltage adjustment module, for outputting different adjusted voltage values to the same powered device;

An acquisition module, connected to the power-on module, used to acquire the type detected by the power supply equipment and the power receiving equipment under different adjusted voltage values;

The determination module is connected with the acquisition module, and is configured to determine the detection accuracy of the type of the powered device by the power supply device according to the detection result of the power supply device.

Further, the device also has the following features: the voltage adjustment module is used to power on the test voltage to a locally preset power consumption device to obtain an adjusted voltage value.

Further, the device also has the following features: the power consumption devices in the voltage adjustment module are connected in the form of at least two sets of parallel circuits.

Further, the device also has the following characteristics: the power consumption components are resistors or crystal diodes.

Further, the device also has the following characteristics: the device also includes:

The current adjustment module includes a plurality of current adjustment units, wherein the resistance value of the load circuit composed of each current adjustment unit and the powered equipment corresponds to a different classification of the powered equipment, wherein:

The power-on module is also used to provide voltages for multiple load circuits composed of the same powered device and different current adjustment units using different adjusted voltage values;

The obtaining module is also used to obtain the classification information detected by the power supply equipment for each load circuit under different adjusted voltage values;

The determination module is further configured to determine whether the detection of the classification of the power receiving equipment by the power supply equipment is accurate by judging whether the classification information obtained under different adjusted voltage values is consistent with the classification corresponding to the load circuit Spend.

A method for detecting the capability of a power supply device, comprising:

Adjust the test voltage output by the power supply equipment to different voltage values;

Use different adjusted voltage values to output to the same powered equipment;

Obtaining the type detected by the power supply device for the power receiving device under different adjusted voltage values;

According to the detection result of the power supply equipment, the detection accuracy of the type of the power receiving equipment by the power supply equipment is determined.

Further, the method also has the following characteristics: the test voltage is powered on to a locally preset power consumption device to obtain an adjusted voltage value.

Further, the method also has the following characteristics: the power consumption devices are connected in the form of at least two sets of parallel circuits. .

Further, the method also has the following characteristics: the power consumption components are resistors or crystal diodes.

Further, the method also has the following characteristics: the method also includes:

Different adjusted voltage values are used to provide voltages to multi-channel load circuits composed of the same powered device and different current adjustment units, wherein the resistance value of the load circuit composed of each current adjustment unit and the powered device corresponds to the power received Different classifications of equipment;

Obtaining the grading information detected by the power supply equipment for each load circuit under different adjusted voltage values;

By judging whether the classification information obtained under different adjusted voltage values is consistent with the classification corresponding to the load circuit, the detection accuracy of the classification of the power receiving device by the power supply device is determined.

In the technical solution provided by the present invention, by adjusting the obtained test voltage of the power supply equipment to different voltage values, and then obtaining the detection results of the power supply equipment for the power receiving equipment under different voltage environments, and then according to the detection results of the power supply equipment, The detection accuracy of the power supply equipment for the type of the power receiving equipment is determined, so as to achieve the purpose of knowing the detection capability of the power supply equipment.

Description of drawings

FIG. 1 is a schematic flow diagram of an embodiment of a method for detecting the capability of a power supply device provided by the present invention;

2 is a schematic flow diagram of an application example of a method for detecting the capability of a power supply device provided by the present invention;

Fig. 3 is a schematic flowchart of another application example of the method for detecting the capability of power supply equipment provided by the present invention;

Fig. 4 is a schematic structural diagram of an embodiment of a device for detecting the capability of power supply equipment provided by the present invention;

Fig. 5 is a schematic structural diagram of a detection system provided by the present invention using the device shown in Fig. 4 .

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the present invention provides a method for detecting the capability of power supply equipment, including:

Step 101, adjusting the test voltage output by the power supply equipment to different voltage values;

Step 102, using different adjusted voltage values to output to the same powered device;

Step 103, acquiring the type detected by the power supply device for the power receiving device under different adjusted voltage values;

Step 104, according to the detection result of the power supply equipment, determine the detection accuracy of the type of the power receiving equipment by the power supply equipment.

According to the technical solution provided by the present invention, the obtained test voltage of the power supply equipment is adjusted to different voltage values, and then the detection results of the power supply equipment for the power receiving equipment in different voltage environments are obtained, and then according to the detection results of the power supply equipment, determine The detection accuracy of the type of the power receiving device by the power supply device achieves the purpose of knowing the detection capability of the power supply device.

The technical scheme provided by the present invention is further described below:

Application example one

As shown in Figure 2, the present invention provides an application example of a method for detecting the capability of power supply equipment, including:

Step 201, power on the test voltage output by the power supply equipment for different voltage adjustment modules to obtain different adjusted voltage values;

In this step, the test voltage is adjusted to different voltage values by using the test power supply as a voltage adjustment module for adjusting the voltage. Voltage value.

The power consumption device can be a resistor or a crystal diode.

It should be noted that the power consumption device is not limited thereto, and those skilled in the art may also use other voltage consumption devices, which will not be repeated here.

In practical application, it can be implemented by using one or more parallel circuits in series with the powered equipment. If a parallel circuit is used to construct, each circuit in the parallel circuit is configured as a voltage adjustment module. Of course, the A new parallel circuit composed of at least two branches in the parallel circuit is used as a voltage adjustment module. If at least two parallel circuits are connected in series, at least one branch needs to be selected from each parallel circuit, and the selected The branch circuit is configured as a voltage regulation module. By disposing a switch on each branch, the use state of the branch is controlled, that is, the switch is turned off, which means that the test voltage is adjusted by using the circuit elements of the branch where the switch is located. When the voltage to be adjusted has n values, if a parallel circuit is used, the parallel circuit includes n branches, and the voltage adjustment capability in each branch is different from each other. For example, if it passes the power consumption adjustment test Voltage branches, taking resistance as an example, the total resistance of each branch resistance can be different in pairs; if m parallel circuits are used to realize, the number of branches in each parallel circuit is A1, A2, A3...Am, where A1*A2*A3...*Am>n, it can be obtained that multiple parallel circuits are used to implement. It can be seen from the above that, compared with the circuit elements required by using a parallel circuit, when the number of values to adjust the voltage output by the PSE is the same, the number of circuit elements required to use multiple parallel circuits in series is less It is less to implement in a parallel circuit, and the required hardware cost is low.

Preferably, the present invention uses a power consumption device to realize voltage adjustment, and the selected power consumption device is a crystal diode. Since the power consumption capability of the crystal diode is within a certain range, that is, between 0.15V and 1.7V, the testing personnel can know the current testing environment.

Step 202, using different adjusted voltage values to output to the same powered device;

Step 203, acquiring the type detected by the power supply device for the power receiving device under different adjusted voltage values;

In this step, as shown in Table 1, the types of PDs in the prior art are divided into 7 categories:

Item Parameter Symbol unit Min Max 1 Accept signature resistance Good kΩ 19.0 26.5 2 Accept signature capacity Cgood µF -- 0.150 3 Signature offset voltage tolerance Vos V 0 2.00 4 Signature offset current tolerance Ios µA 0 12.0 5 Reject signature resistance Rbad kΩ ＜15.0 ＞33.0 6 Reject signature capacity Cbad µF 10.0 -- 7 Open circuit resistance Ropen MΩ 0.500 --

Table 1 Classification of PDs specified in the IEEE802.3at standard

The methods for the power supply equipment to detect the type of the power receiving equipment in the prior art are all applicable to this invention, and will not be repeated here.

Step 204, judging whether the same detection results among the detection results of the power supply equipment meet the preset number management strategy.

In this step, the number management strategy is that the same detection results account for more than 80% of all detection results. If it is greater, it is determined that the number management strategy is satisfied; otherwise, it is determined that the number management strategy is not satisfied.

Step 205: Determine the detection accuracy of the type of the powered device by the power supply device according to the judgment result.

In this step, if it is determined that the number management strategy is satisfied, it is determined that the detection accuracy is high, which means that the power supply equipment can normally detect this type of powered equipment in the future, and make a power supply response according to the detection situation; otherwise , it is determined that the detection accuracy is low, which means that the power supply equipment will not be able to test this type of power receiving equipment in the future, and should not be used.

It should be noted that steps 201 to 205 can detect the detection accuracy of a certain type of power supply equipment, but are not limited thereto. Those skilled in the art can use the steps to detect other types of powered equipment to obtain the accuracy of power supply equipment for other types. Type detection accuracy, because the method and process are similar, so I won't go into details here.

The technical solution provided by Application Example 1 of the present invention adjusts the obtained test voltage of the power supply equipment to different voltage values, and then obtains the detection results of the power supply equipment for the power receiving equipment under different voltage environments, and then according to the detection results of the power supply equipment As a result, the detection accuracy of the power supply equipment for the type of power receiving equipment is determined, and the purpose of knowing the detection capability of the power supply equipment is achieved; the power consumption device is used to adjust the size of the test voltage, and the implementation method is simple; the method of connecting multiple parallel circuits in series Construct voltage adjustment circuit with low hardware cost.

Application example two

As shown in Figure 3, the present invention provides another application example of a method for detecting the capability of power supply equipment, including:

Step 301, adjust the voltage output by the power supply equipment to different voltage values, and use the adjusted different voltage values to provide voltages respectively to multiple load circuits composed of the same powered equipment and different current adjustment units, wherein each current adjustment unit is connected to the The resistance value of the load circuit composed of the powered equipment corresponds to the different classifications of the powered equipment.

In this step, each current adjustment unit is used to identify a classification of the powered equipment, which is realized by resistors with different resistance values, and the resistance value of each current adjustment unit is determined by the classification of the powered equipment. The corresponding current is determined, as shown in Table 2:

Measured Iclass Classification 0mA——5.00mA Class0 ＞5.00mA and ＜8.00mA May be Class 0or1 8.00mA——13.0mA Class 1 ＞13.0mA and ＜16.0mA EitherClass 1or2 16.0mA——21.0mA Class2 ＞5.00mA and ＜8.00mA Either Class 2or 3 8.00mA——13.0mA Class 3 ＞5.00mA and ＜8.00mA Either Class 3or 4 8.00mA——13.0mA Class4 ＞5.00mA and ＜8.00mA Either Class 4 or invalid class

Table 2 PD classification specified in IEEE802.3zt standard

For example, the resistance range of the resistor in the current adjustment unit of Class 0 can be obtained in the following way: (current voltage value ÷ the current value of Class0) - the resistance value of the powered device, refer to the current value of Class 0 in Table 2 The upper and lower limits of the value can be used to obtain the upper and lower limits of the resistance value of the resistor in the Class 0 current adjustment unit.

The voltage value may be the test voltage directly output by the power supply equipment, or the voltage after passing through the power consumption device.

The resistors of each classification are connected in parallel circuit, and each branch is equipped with an enabling switch, and the classification to be detected is controlled by controlling the state of the enabling switch.

Step 302, obtaining the classification information detected by the power supply equipment for each load circuit under different adjusted voltage values;

For example, the different adjusted voltage values are A, B, and C respectively, then the classification information detected by the power supply equipment for each load circuit under the voltage value A is obtained, and the same is true for B and C.

Step 303, judging whether the classification information obtained under different adjusted voltage values is consistent with the classification corresponding to the load circuit;

In this step, it is determined whether the power supply equipment detects all the classifications of the powered equipment under a certain voltage value. For example, when the voltage is A, the power supply equipment detects that the classification of the load circuit is Class1. If you check the classification corresponding to the load circuit is Class1, it is determined that the two classification information are consistent, indicating that the power supply equipment is accurate in checking the classification at this voltage; otherwise, it is determined that the two classification information are inconsistent, indicating that the power supply equipment is not accurate in checking the classification at this voltage. The detection results of the classification of the power supply equipment under different voltages can be obtained by using the above method.

Step 304 , according to the judgment result, determine the detection accuracy of the classification of the power receiving device by the power supply device.

In this step, if the result determined in step 303 is that the power supply equipment is very accurate for each classification detection under each different adjustment voltage, it means that the classification detection accuracy of the power supply equipment for the powered equipment is high, and it can be used in the future Perform an accurate test on the classification of the powered equipment; otherwise, it means that the accuracy of the detection of the classification of the powered equipment by the power supply equipment is low, and there will be misjudgments in the classification detection of the powered equipment in the future.

It should be noted that steps 301 to 304 can detect the detection accuracy of the classification of a certain powered equipment by the power supply equipment, but is not limited to this, and those skilled in the art can use the steps to detect other powered equipment to obtain the classification of the power supply equipment. The classification detection accuracy of other powered equipment, because the method and process are similar, will not be repeated here.

In the technical solution provided by the second application example of the present invention, by connecting different current adjustment units with the power receiving equipment, the original classification detection object of the power supply equipment is changed from one to multiple, and then the classification information obtained by the power supply equipment is correct. , to determine the detection accuracy of the classification of the powered equipment by the power supply equipment.

Combining the methods shown in Figures 1 to 3, the present invention provides a device for detecting the capability of power supply equipment, as shown in Figure 4, including:

A voltage adjustment module 401, configured to adjust the test voltage output by the power supply device to a different voltage value;

The power-on module 402 is connected to the voltage adjustment module 401, and is used to output different adjusted voltage values to the same powered device;

An obtaining module 403, connected to the power-on module 402, configured to obtain the type detected by the power supply device for the powered device under different adjusted voltage values;

The determination module 404 is connected to the acquisition module 403 and configured to determine the detection accuracy of the type of the powered device by the power supply device according to the detection result of the power supply device.

Further, the voltage adjustment module is used to power on the test voltage to a locally preset power consumption device to obtain an adjusted voltage value.

Further, the power consumption devices in the voltage adjustment module are connected in the manner of at least two sets of parallel circuits.

Further, the power consumption components are resistors or crystal diodes.

Further, the device also includes:

The current adjustment module includes a plurality of current adjustment units, wherein the resistance value of the load circuit composed of each current adjustment unit and the powered equipment corresponds to a different classification of the powered equipment, wherein:

The power-on module is also used to provide voltages to multiple load circuits composed of the same powered device and different current adjustment units using different adjusted voltage values;

The obtaining module is also used to obtain the classification information detected by the power supply equipment for each load circuit under different adjusted voltage values;

The determination module is further configured to determine whether the classification information obtained under different adjusted voltage values is consistent with the classification corresponding to the load circuit, so as to determine whether the detection of the classification of the powered device by the power supply device is accurate Spend.

With reference to the above description, the present invention provides a system using the device, as shown in Figure 5, wherein:

Data/power supply signal input module, which is mainly used to separate Ethernet data signal and power supply signal;

The rectifier module is used to be compatible with the polarity of the power signal carried by different differential pairs;

The voltage adjustment module is composed of different numbers of diode channels, which are used to adjust the test voltage to different voltage values;

The current adjustment module consists of graded resistors of different sizes to adjust the current of the system.

The device provided by the present invention adjusts the obtained test voltage of the power supply equipment to different voltage values, and then obtains the test results of the power supply equipment for the power receiving equipment under different voltage environments, and then determines the test voltage of the power supply equipment according to the test results of the power supply equipment. Describe the detection accuracy of the power supply equipment for the type of power receiving equipment to achieve the purpose of knowing the detection capability of the power supply equipment; use power consumption devices to adjust the size of the test voltage, the implementation method is simple; build a voltage adjustment circuit by connecting multiple parallel circuits in series , the hardware cost is low; by connecting different current adjustment units to the power receiving equipment, the original classification detection object of the power supply equipment is changed from one to multiple, and then the power supply equipment is determined by checking whether the classification information obtained by the power supply equipment is correct. The detection accuracy of the equipment to the classification of the powered equipment.

Those of ordinary skill in the art can understand that all or part of the steps of the above-mentioned embodiments can be implemented using a computer program flow, the computer program can be stored in a computer-readable storage medium, and the computer program can be run on a corresponding hardware platform (such as system, device, device, device, etc.), and when executed, includes one or a combination of the steps of the method embodiment.

Optionally, all or part of the steps in the above embodiments can also be implemented using integrated circuits, and these steps can be fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module accomplish. As such, the present invention is not limited to any specific combination of hardware and software.

The devices/functional modules/functional units in the above embodiments can be realized by general-purpose computing devices, and they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices.

When each device/functional module/functional unit in the above-mentioned embodiments is realized in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope described in the claims.

Claims (10)

1. a device that detects capacity of power-sourcing equipment is characterized in that, comprising:

Voltage regulator module is used for the test voltage of power supply unit output is adjusted into different magnitudes of voltage;

The module that powers on links to each other with described voltage regulator module, is used to adopt adjusted different magnitude of voltage to export to same power receiving equipment;

Acquisition module links to each other with the described module that powers on, and is used to obtain described power supply unit described power receiving equipment is being adopted the type that detection obtains under the adjusted different magnitudes of voltage;

Determination module links to each other with described acquisition module, is used for the testing result according to described power supply unit, determines the accuracy in detection of described power supply unit to the type of this power receiving equipment.

2. device according to claim 1 is characterized in that, it is that the local power consumption device that sets in advance powers on that described voltage regulator module is used for described test voltage, obtains adjusted magnitude of voltage.

3. device according to claim 2 is characterized in that, the mode that the power consumption device is taken to few two groups of parallel circuitss in the described voltage regulator module connects.

4. according to claim 2 or 3 described devices, it is characterized in that described power consumption components and parts are resistance or crystal diode.

5. device according to claim 1 is characterized in that, described device also comprises:

Current adjusting module comprises a plurality of current adjustment units, and wherein the resistance of the load circuit formed of each current adjustment unit and described power receiving equipment is to should the different classification of power receiving equipment, wherein:

The described module that powers on, the multichannel loading circuit that also is used to adopt adjusted different magnitude of voltage to form for same power receiving equipment and different current adjustment units provides voltage;

Described acquisition module also is used to obtain described power supply unit and under adjusted different magnitudes of voltage each load circuit is detected the rating information that obtains;

Whether described determination module also is used for by judging with the rating information that gets access under the adjusted different magnitudes of voltage consistently with the corresponding classification of described load circuit, determines the accuracy in detection of described power supply unit to the classification of described power receiving equipment.

6. a method that detects capacity of power-sourcing equipment is characterized in that, comprising:

The test voltage of power supply unit output is adjusted into different magnitudes of voltage;

Adopt adjusted different magnitude of voltage to export to same power receiving equipment;

Obtain described power supply unit described power receiving equipment is being adopted the type that detection obtains under the adjusted different magnitudes of voltage;

According to the testing result of described power supply unit, determine the accuracy in detection of described power supply unit to the type of this power receiving equipment.

7. method according to claim 6 is characterized in that, described test voltage for the local power consumption device that sets in advance powers on, is obtained adjusted magnitude of voltage.

8. method according to claim 7 is characterized in that, described power consumption device is to adopt the mode of at least two group parallel circuitss to connect.

9. according to claim 7 or 8 described methods, it is characterized in that described power consumption components and parts are resistance or crystal diode.

10. method according to claim 6 is characterized in that, described method also comprises:

The multichannel loading circuit that adopts adjusted different magnitude of voltage to form for same power receiving equipment and different current adjustment units provides voltage respectively, and wherein the resistance of each current adjustment unit and the load circuit of described power receiving equipment composition is to should the different classification of power receiving equipment;

Obtain described power supply unit and under adjusted different magnitudes of voltage, each load circuit is detected the rating information that obtains;

Whether consistent by judging the rating information under adjusted different magnitudes of voltage, get access to the corresponding classification of described load circuit, determine the accuracy in detection of described power supply unit to the classification of described power receiving equipment.

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