CN107888448B - Reverse power supply detection device and method - Google Patents
Reverse power supply detection device and method Download PDFInfo
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- CN107888448B CN107888448B CN201711057727.3A CN201711057727A CN107888448B CN 107888448 B CN107888448 B CN 107888448B CN 201711057727 A CN201711057727 A CN 201711057727A CN 107888448 B CN107888448 B CN 107888448B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
- H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
- H04M3/302—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
- H04M3/304—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using xDSL modems
Abstract
The invention provides a reverse power supply detection device, which is used for testing the functional integrity of a power supply unit and comprises: a power receiving unit, a control unit, and a display unit; the power supply unit is electrically connected with the power receiving unit of the reverse power supply detection device through a telephone line; the voltage output end of the power supply unit, the power receiving unit and the display unit are electrically connected with the control unit; the power receiving unit is used for receiving the electric energy provided by the power supply unit; the control unit is used for carrying out different application scene simulation configurations on the power receiving unit and monitoring whether the voltage value output by the power supply unit meets the preset requirement or not under different application scenes to generate a corresponding detection result; the display unit is used for displaying the detection result to a test user in real time. The invention also provides a reverse power supply detection method. The device can simply and effectively detect the reverse power supply equipment, and all standard detections can be automatically completed without manual intervention.
Description
Technical Field
The invention belongs to the technical field of DSL equipment detection, and particularly relates to a reverse power supply detection device and method.
Background
Because the network layout of the telephone line is complex, there may be a short circuit on the signal line, there may be a traditional telephone ringing signal in the line, for the complex application occasions such as the power supply of the telephone, this has very high requirements for the security of the RPF (Reverse power feed) unit, it needs to detect various possible situations in the design, the RPF module will carry on the handshake detection with the PD module of the receiving end, detect whether the receiving end is legal, the grade classification of the receiving end, every stage of the whole detection process has many situations, at present, it mainly uses the manual mode to carry on the whole detection very complicated and tedious, therefore how to carry on the detection of the complete function to the RPF module simply, effectively and fast is very important.
Disclosure of Invention
The present invention is directed to a reverse power supply detection apparatus and method for overcoming the disadvantages of the prior art.
Specifically, the present invention proposes the following specific examples:
the embodiment of the invention provides a reverse power supply detection device, which is used for testing the functional integrity of a power supply unit and comprises the following components: a power receiving unit, a control unit, and a display unit;
the power supply unit is electrically connected with the power receiving unit of the reverse power supply detection device through a telephone line; the voltage output end of the power supply unit, the power receiving unit and the display unit are electrically connected with the control unit;
the power receiving unit is used for receiving the electric energy provided by the power supply unit;
the control unit is used for carrying out different application scene simulation configurations on the power receiving unit and monitoring whether the voltage value output by the power supply unit meets the preset requirement under different application scenes so as to generate a corresponding detection result;
and the display unit is used for displaying the detection result to a test user in real time.
As a further improvement of the above technical solution, the application scenario includes: fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification; the fault detection specifically comprises: short circuit of telephone line, open circuit of telephone line, existence of DC power supply on telephone line and telephone off-hook of telephone line; the PD verification comprises: valid PD and invalid PD; the PD verification is used for judging whether the power receiving unit can receive the power supply of the power supply unit, only the power receiving unit which can receive the power supply of the power supply unit is a valid PD, and the power receiving unit which cannot receive the power supply of the power supply unit is an invalid PD; the control unit sequentially carries out simulation configuration according to the sequence of fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification, and only when a certain scene passes the detection, the control unit can automatically switch to the next scene for continuous detection.
As a further improvement of the above technical solution, the application scenario of the fault detection includes a simulated power-on process and a normal power supply process.
As a further improvement of the above technical solution, the PD classification verification is divided into three classes, the output power corresponding to each class is different, and it is required to detect whether the output power value matches with the corresponding class.
As a further improvement of the above technical solution, the voltage value output by the power supply unit during the fault detection is a value a, the voltage value output by the power supply unit after the fault detection verification is passed is a value B, the PD verification is continued, the voltage value output by the power supply unit when a valid PD is detected is a value C, and then the PD classification verification is performed, wherein the voltage value output by the power supply unit is greater than the value C and smaller than the value D; when the fault detection, the PD verification and the PD grading verification are all passed, the power supply unit outputs a normal voltage value as a numerical value E; the value a increases to the value E in order.
The embodiment of the invention also provides a reverse power supply detection method, which uses a reverse power supply detection device to test the functional integrity of a power supply unit, wherein the reverse power supply detection device comprises: a power receiving unit, a control unit, and a display unit; the power supply unit is electrically connected with the power receiving unit of the reverse power supply detection device through a telephone line; the voltage output end of the power supply unit, the power receiving unit and the display unit are electrically connected with the control unit; the method comprises the following steps:
carrying out simulation configuration on an application scene of a power receiving unit;
monitoring whether the voltage value of the external power supply unit meets a preset requirement in the application scene;
and generating a corresponding detection result and displaying the detection result to a test user in real time through a display unit.
As a further improvement of the above technical solution, the application scenario includes: fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification; the fault detection specifically comprises: short circuit of telephone line, open circuit of telephone line, existence of DC power supply on telephone line and telephone off-hook of telephone line; the PD verification comprises: valid PD and invalid PD; the PD verification is used for judging whether the power receiving unit can receive the power supply of the power supply unit, only the power receiving unit which can receive the power supply of the power supply unit is a valid PD, and the power receiving unit which cannot receive the power supply of the power supply unit is an invalid PD; the control unit sequentially carries out simulation configuration according to the sequence of fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification, and only when a certain scene passes the detection, the control unit can automatically switch to the next scene for continuous detection.
As a further improvement of the above technical solution, the application scenario of the fault detection includes a simulated power-on process and a normal power supply process.
As a further improvement of the above technical solution, the PD classification verification is divided into three classes, the output power corresponding to each class is different, and it is required to detect whether the output power value matches with the corresponding class.
As a further improvement of the above technical solution, the voltage value output by the power supply unit during the fault detection is a value a, the voltage value output by the power supply unit after the fault detection verification is passed is a value B, the PD verification is continued, the voltage value output by the power supply unit when a valid PD is detected is a value C, and then the PD classification verification is performed, wherein the voltage value output by the power supply unit is greater than the value C and smaller than the value D; when the fault detection, the PD verification and the PD grading verification are all passed, the power supply unit outputs a normal voltage value as a numerical value E; the value a increases to the value E in order.
Compared with the prior art, the technical scheme provided by the invention at least has the following beneficial effects: the method comprises the following steps of carrying out different scene configuration on a power receiving unit through a control unit, wherein the scene configuration comprises the following steps: the scenes of short circuit and open circuit of the line, direct current power supply on the line, telephone off-hook of the line, effective PD, invalid PD, PD classification detection, line attenuation and the like required in the RPF standard are simulated and switched, meanwhile, the range of the voltage value output by the power supply unit meeting the standard requirement is monitored, and finally, the data is displayed through the display unit, thereby achieving the purpose of automatic detection. The reverse power supply equipment can be simply and effectively detected, and all standard detections can be automatically completed without manual intervention, so that the detection integrity of the product is improved, and the quality of the product is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a reverse power supply detection apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a reverse power supply detection method according to an embodiment of the present invention.
Description of the main element symbols:
101-a power receiving unit; 102-a control unit; 103-a display unit; 104-power supply unit.
Detailed Description
Various embodiments of the present disclosure will be described more fully hereinafter. The present disclosure is capable of various embodiments and of modifications and variations therein. However, it should be understood that: there is no intention to limit the scope of the disclosure to the specific embodiments disclosed herein, but rather, the disclosure is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of the various embodiments of the disclosure.
Hereinafter, the term "includes" or "may include" used in various embodiments of the present disclosure indicates the presence of the disclosed functions, operations, or elements, and does not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present disclosure, the terms "comprising," "having," and their derivatives, are intended to be only representative of the particular features, integers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to one or more other features, integers, steps, operations, elements, components, or combinations of the foregoing.
Expressions (such as "first", "second", and the like) used in various embodiments of the present disclosure may modify various constituent elements in the various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user equipment and the second user equipment indicate different user equipments, although both are user equipments. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present disclosure.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the present disclosure. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present disclosure belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined in various embodiments of the present disclosure.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a reverse power supply detection apparatus for testing the functional integrity of a power supply unit 104, including: a power receiving unit 101, a control unit 102, and a display unit 103.
The power supply unit 104 is electrically connected with the power receiving unit 101 of the reverse power supply detection device through a telephone line; the voltage output terminal of the power supply unit 104, the power receiving unit 101 and the display unit 103 are electrically connected to the control unit 102.
The power receiving unit 101 is configured to receive power provided by the power supply unit.
The control unit 102 is configured to perform different application scene simulation configurations on the power receiving unit 101 and monitor whether a voltage value output by the power supply unit 104 meets a preset requirement in different application scenes to generate a corresponding detection result.
The display unit 103 is used for displaying the detection result to a test user in real time.
The application scene comprises the following steps: fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification; the fault detection specifically comprises: short circuit of telephone line, open circuit of telephone line, existence of DC power supply on telephone line and telephone off-hook of telephone line; the PD verification comprises: valid PD and invalid PD; the PD verification is used for judging whether the power receiving unit can receive the power supply of the power supply unit, only the power receiving unit which can receive the power supply of the power supply unit is a valid PD, and the power receiving unit which cannot receive the power supply of the power supply unit is an invalid PD; the control unit sequentially carries out simulation configuration according to the sequence of fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification, and only when a certain scene passes the detection, the control unit can automatically switch to the next scene for continuous detection.
And only after the fault detection is passed, the scene of PD verification is switched to, when the PD verification is passed, the PD classification verification is switched to when the PD verification is passed, after the PD classification verification is passed, the PD supplies power normally, and after the normal power supply, the subsequent line attenuation verification scene and the overload protection verification scene are switched.
The application scenario of the fault detection also comprises a simulated power-on process and a normal power supply process.
Because telephone line shorts, opens, the presence of dc power, and telephone off-hook failures may initially exist, and may also occur during the power supply process, it is desirable to simulate different times of occurrence. The method specifically comprises the steps that the control unit controls the power receiving unit to switch and insert different fault phenomena (short circuit, open circuit, external direct-current power supply and off-hook), the voltage output range on a line is detected simultaneously, the power supply unit cannot output a standard voltage value E under the condition that a fault exists, the fault phenomena are divided into two conditions which occur in the power-on process and the normal power supply process, when the fault phenomena occur in the power-on process, the power supply unit cannot output the standard voltage value E, the voltage value which can be output at the moment is the value A, then the condition of handshake detection with the power receiving unit is returned again, when the fault phenomena occur in the normal power supply process, the power supply unit needs to stop continuous power supply immediately, and then the condition of handshake detection with the power receiving unit is returned again. The control unit inserts the fault phenomenon under different conditions, simultaneously monitors whether the voltage on the line meets the requirements or not, and displays the voltage through the display unit.
The PD classification verification is divided into three levels, the output power corresponding to each level is different, and whether the output power value is matched with the corresponding level needs to be detected.
The PD classification has three levels, namely SR1, SR2 and SR3, the power corresponding to the three levels is different, the power level corresponding to the power provided by the power supply unit is needed, and the verification process is PD classification verification.
When the fault detection is carried out, the voltage value output by the power supply unit is a value A, after the fault detection verification is passed, the voltage value output by the power supply unit is a value B, the PD verification is continued, when the effective PD is detected, the voltage value output by the power supply unit is a value C, then the PD classification verification is carried out, and the voltage value output by the power supply unit is greater than the value C and less than the value D; when the fault detection, the PD verification and the PD grading verification are all passed, the power supply unit outputs a normal voltage value as a numerical value E; all voltages are in the same unit of measure and the value A, B, C, D, E increases in turn.
After the power supply unit is connected with the power receiving unit, whether a fault exists on a line (line short circuit, open circuit, direct current power supply existence and telephone off-hook occurrence) is detected firstly, if one of the 4 conditions occurs, the fault is indicated, if the fault occurs, the output voltage value of the power supply unit is a numerical value A, and fault detection is repeated until the fault passes verification. Since the fault detection is performed by adding a small value a to the line, this voltage is the only voltage to be detected at the beginning. When the fault detection is passed, the control unit switches different resistance values on the line of the power receiving unit through control, simultaneously, the voltage change condition on the line is monitored, when the resistance is the effective resistance of the power receiving unit, the voltage on the output line of the power supply unit can be increased to a value C, and under other conditions, the voltage is a value B, when the resistance is the effective resistance of the power receiving unit, the resistance value switching of the grading resistance is controlled, the voltage value on the output line of the power supply unit can be between the value C and the value D, and therefore the hand shaking condition between the power supply unit and the power receiving unit can be detected. Detecting a handshake between the power supply unit and the power receiving unit is to detect whether the PD is valid. The output voltage of the power supply unit is increased step by step, and the next step is carried out when the output voltage meets a requirement.
The line attenuation verification specifically comprises the following steps: after the power supply unit normally outputs the voltage value E, the control unit switches and controls the load change of the power receiving unit to enable the load of the power receiving unit to reach the maximum load required by the grade, controls the line attenuation to reach the maximum value required by the standard, and then detects whether the output voltage of the power supply unit can meet the requirement or not.
The overload protection verification specifically comprises the steps that after the control unit outputs a voltage value E normally to the power supply unit, the control unit adjusts the load of the power receiving unit, the load is increased to a required overload detection value, and meanwhile, whether the output voltage of the power supply unit can be subjected to overload protection or not is monitored, so that normal continuous power supply is stopped.
The detection mechanism flow chart is as follows: the method can be divided into two stages, wherein the first stage is to detect different conditions of each stage respectively until the power is supplied normally finally, the second stage is to increase the load and monitor the condition of the output voltage, and finally the overall detection is finished.
Example 2
As shown in fig. 2, an embodiment of the present invention provides a reverse power supply detection method, which uses a reverse power supply detection apparatus to test the functional integrity of a power supply unit, where the reverse power supply detection apparatus includes: a power receiving unit, a control unit, and a display unit; the power supply unit is electrically connected with the power receiving unit of the reverse power supply detection device through a telephone line; the voltage output end of the power supply unit, the power receiving unit and the display unit are electrically connected with the control unit; the method comprises the following steps:
s101, performing simulation configuration on an application scene on the power receiving unit.
S102, monitoring whether the voltage value of the external power supply unit meets the preset requirement or not in the application scene.
And S103, generating a corresponding detection result and displaying the detection result to a test user in real time through a display unit.
The application scene comprises the following steps: fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification; the fault detection specifically comprises: short circuit of telephone line, open circuit of telephone line, existence of DC power supply on telephone line and telephone off-hook of telephone line; the PD verification comprises: valid PD and invalid PD; the PD verification is used for judging whether the power receiving unit can receive the power supply of the power supply unit, only the power receiving unit which can receive the power supply of the power supply unit is a valid PD, and the power receiving unit which cannot receive the power supply of the power supply unit is an invalid PD; the control unit sequentially carries out simulation configuration according to the sequence of fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification, and only when a certain scene passes the detection, the control unit can automatically switch to the next scene for continuous detection.
The application scene of the fault detection comprises a simulated power-on process and a normal power supply process.
The PD classification verification is divided into three levels, the output power corresponding to each level is different, and whether the output power value is matched with the corresponding level needs to be detected.
When the fault detection is carried out, the voltage value output by the power supply unit is a value A, after the fault detection verification is passed, the voltage value output by the power supply unit is a value B, the PD verification is continued, when the effective PD is detected, the voltage value output by the power supply unit is a value C, then the PD classification verification is carried out, and the voltage value output by the power supply unit is greater than the value C and less than the value D; when the fault detection, the PD verification and the PD grading verification are all passed, the power supply unit outputs a normal voltage value as a numerical value E; all voltages are in the same unit of measure and the value A, B, C, D, E increases in turn.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the device in the implementation scenario may be distributed in the device in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above-mentioned invention numbers are merely for description and do not represent the merits of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. A reverse power supply detection device for testing the functional integrity of a power supply unit, comprising: a power receiving unit, a control unit, and a display unit;
the power supply unit is electrically connected with the power receiving unit of the reverse power supply detection device through a telephone line; the voltage output end of the power supply unit, the power receiving unit and the display unit are electrically connected with the control unit;
the power receiving unit is used for receiving the electric energy provided by the power supply unit;
the control unit is used for carrying out different application scene simulation configurations on the power receiving unit and monitoring whether the voltage value output by the power supply unit meets the preset requirement under different application scenes so as to generate a corresponding detection result;
and the display unit is used for displaying the detection result to a test user in real time.
2. The reverse power supply detection device according to claim 1, wherein the application scenario includes: fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification; the fault detection specifically comprises: short circuit of telephone line, open circuit of telephone line, existence of DC power supply on telephone line and telephone off-hook of telephone line; the PD verification comprises: valid PD and invalid PD; the PD verification is used for judging whether the power receiving unit can receive the power supply of the power supply unit, only the power receiving unit which can receive the power supply of the power supply unit is a valid PD, and the power receiving unit which cannot receive the power supply of the power supply unit is an invalid PD; the control unit sequentially carries out simulation configuration according to the sequence of fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification, and only when a certain scene passes the detection, the control unit can automatically switch to the next scene for continuous detection.
3. The reverse power supply detection device of claim 2, wherein the application scenario of the fault detection includes a simulated power-on process and a normal power supply process.
4. The reverse power supply detection device according to claim 2, wherein the PD classification verification is divided into three classes, each class has different corresponding output power, and it is required to detect whether the output power value matches the corresponding class.
5. The reverse power supply detection device according to claim 2, wherein the voltage value output by the power supply unit during the fault detection is a value a, the voltage value output by the power supply unit after the fault detection verification is passed is a value B, the PD verification is continued, the voltage value output by the power supply unit when a valid PD is detected is a value C, and then the PD classification verification is performed, and the voltage value output by the power supply unit is greater than the value C and less than the value D; when the fault detection, the PD verification and the PD grading verification are all passed, the power supply unit outputs a normal voltage value as a numerical value E; the value a increases to the value E in order.
6. A reverse power supply detection method for testing the functional integrity of a power supply unit using a reverse power supply detection device, the reverse power supply detection device comprising: a power receiving unit, a control unit, and a display unit; the power supply unit is electrically connected with the power receiving unit of the reverse power supply detection device through a telephone line; the voltage output end of the power supply unit, the power receiving unit and the display unit are electrically connected with the control unit; the method comprises the following steps:
carrying out simulation configuration on an application scene of a power receiving unit;
monitoring whether the voltage value of the external power supply unit meets a preset requirement in the application scene;
and generating a corresponding detection result and displaying the detection result to a test user in real time through a display unit.
7. The reverse power supply detection method according to claim 6, wherein the application scenario includes: fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification; the fault detection specifically comprises: short circuit of telephone line, open circuit of telephone line, existence of DC power supply on telephone line and telephone off-hook of telephone line; the PD verification comprises: valid PD and invalid PD; the PD verification is used for judging whether the power receiving unit can receive the power supply of the power supply unit, only the power receiving unit which can receive the power supply of the power supply unit is a valid PD, and the power receiving unit which cannot receive the power supply of the power supply unit is an invalid PD; the control unit sequentially carries out simulation configuration according to the sequence of fault detection, PD verification, PD classification verification, line attenuation verification and overload protection verification, and only when a certain scene passes the detection, the control unit can automatically switch to the next scene for continuous detection.
8. The reverse power supply detection method according to claim 7, wherein the application scenario of the fault detection includes a simulated power-on process and a normal power supply process.
9. The reverse power supply detection method according to claim 7, wherein the PD classification verification is divided into three classes, each class has different corresponding output power, and it is required to detect whether the output power value matches the corresponding class.
10. The reverse power supply detection method according to claim 7, wherein the voltage value output by the power supply unit during the fault detection is a value A, the voltage value output by the power supply unit after the fault detection verification is passed is a value B, the PD verification is continued, the voltage value output by the power supply unit when a valid PD is detected is a value C, and then the PD classification verification is carried out, wherein the voltage value output by the power supply unit is greater than the value C and less than the value D; when the fault detection, the PD verification and the PD grading verification are all passed, the power supply unit outputs a normal voltage value as a numerical value E; the value a increases to the value E in order.
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